CN109592606B

CN109592606B - Multifunctional carrier

Info

Publication number: CN109592606B
Application number: CN201910077323.3A
Authority: CN
Inventors: 田小林; 张汝权; 钟才粦
Original assignee: Dongguan Jiuneng Machinery Co ltd
Current assignee: Tian Xiaolin
Priority date: 2019-01-24
Filing date: 2019-01-24
Publication date: 2020-09-08
Anticipated expiration: 2039-01-24
Also published as: CN109592606A

Abstract

The invention discloses a multifunctional carrier which comprises a frame, bearing wheels, a bearing frame, a hoisting device, a traction guide device, a control handle, a power supply device and a control device, wherein the bearing wheels are arranged at the rear end of the frame, and the bearing frame vertically moves on the frame; the hoisting device is arranged on the frame and connected to the bearing frame, and drives the bearing frame to vertically lift and move; the traction guide device comprises a steering wheel, a bogie and a driving mechanism, the bogie is vertically pivoted at the front end of the frame, the steering wheel is arranged at the lower end of the bogie, the driving mechanism is arranged on the bogie, and the output end of the driving mechanism is connected to the steering wheel in a transmission way; the control handle is arranged on the frame, the horizontal rotation control handle can control the horizontal pivoting of the steering frame, and the vertical rotation control handle can control the vertical lifting device to vertically lift the bearing frame; the power supply device can be detached from the frame, the control device is electrically connected between the power supply device and the driving mechanism, and the control device controls the driving mechanism to drive the steering wheel to rotate, adjust the rotating speed and brake.

Description

Multifunctional carrier

Technical Field

The invention relates to the technical field of engineering carrying machinery, in particular to a multifunctional carrying vehicle.

Background

At present, a manpower cart is a transportation tool widely used in engineering transportation at construction sites, storage logistics and the like.

However, the existing manual cart is pulled, pulled or pushed basically by manpower, in practical application, a user often needs to manually move the cart by manpower to load materials, the carried materials are heavy, the manual pulling and pulling are very laborious, the cart is not easy to turn, the cart is inflexible to move, the user also needs to manually move the cart to unload the materials when arriving at a destination, the labor intensity is high, the user is very easy to fatigue, the cart has high requirements on the physical performance of the user, the cart is very inconvenient to use, the carrying time and the manpower are greatly increased, the efficiency is low, and the engineering progress is easily influenced. And the existing manpower cart has simple and crude structure, easy damage, short service life and single function. It is difficult to meet the engineering transportation and use requirements of construction sites, warehouse logistics and the like.

Therefore, there is a high necessity for a multi-purpose truck to overcome the above-mentioned problems.

Disclosure of Invention

The invention aims to provide a multifunctional carrier which has the advantages of high mechanical and electric working degree, labor saving and convenience in use, high working efficiency, diversified functions, difficulty in damage and long service life.

In order to achieve the above object, the present invention provides a multi-functional cart, comprising:

a frame;

the bearing wheel is arranged at the rear end of the frame;

the bearing frame is vertically arranged on the frame in a moving manner;

the lifting device is arranged on the frame, the output end of the lifting device is connected to the bearing frame, and the lifting device drives the bearing frame to vertically lift and move;

the traction guide device comprises a steering wheel, a bogie and a driving mechanism, the bogie is vertically pivoted at the front end of the frame, the steering wheel is arranged at the lower end of the bogie, the driving mechanism is arranged on the bogie, and the output end of the driving mechanism is in transmission connection with the steering wheel;

the control handle is arranged on the frame and can rotate horizontally and vertically; the steering handle is also associated with the upper end of the bogie and the input end of the hoisting device, the steering handle is horizontally rotated to steer the bogie to horizontally pivot, and the vertical rotation of the steering handle can steer the hoisting device to vertically lift the carrier;

the power supply device is detachably arranged on the frame; and

the control device is electrically connected between the power supply device and the driving mechanism and controls the driving mechanism to drive the steering wheel to rotate, adjust the rotating speed and brake.

Preferably, the lifting device is a hydraulic ram, a housing of the hydraulic ram is vertically pivoted to the front end of the frame, and the housing of the hydraulic ram is fixedly connected to the upper end of the bogie; the lower end of the operating handle is pivoted on the shell of the hydraulic jack around a horizontal axial lead, and the input ejector rod of the hydraulic jack can be pushed to vertically move by vertically rotating the operating handle; the bearing frame can be horizontally and rotatably connected with an output mandril of the hydraulic jack.

Preferably, the bearing frame comprises a bracket, a fork frame, a crane boom and a pivot sleeve, the bracket vertically slides on the frame, the fork frame is fixed on the bracket along the front-back direction, the lower end of the crane boom is fixedly connected to the bracket, the upper end of the pivot sleeve is pivoted to the upper end of the crane boom around a horizontal axis, and the lower end of the pivot sleeve is vertically pivoted to an output ejector rod of the hydraulic ram.

Preferably, the fork frame comprises a horizontal fork plate, a vertical connecting plate and a barb, the horizontal fork plate is fixed to the lower end of the vertical connecting plate along the front-back direction, the barb is fixed to the upper end of the vertical connecting plate, the vertical connecting plate is fixedly connected to the rear side of the bracket, and the barb is clamped and fixed to the top of the bracket.

Preferably, the frame includes a front frame, a protective cover, a fixing sleeve, a support arm and a guide rail, wherein an accommodating cavity is formed on the front frame, the protective cover can be opened and closed at the top of the accommodating cavity, the fixing sleeve is fixed on the front side of the front frame, the support arm is fixed on the front frame along the front-back direction, and the guide rail is fixed on the front frame along the vertical direction; the lower end of the shell of the hydraulic jack and the upper end of the bogie are both pivoted in the fixed sleeve, and the bearing wheel is arranged at the rear end of the supporting arm; the power supply device is a rechargeable battery pack which is detachably accommodated in the accommodating cavity; the bracket is also provided with a sliding bearing, a guide groove which is vertically arranged is formed in the guide rail, and the sliding bearing slides in the guide groove; the lower end of the side wall of the guide groove, which is close to one side of the front frame, is provided with an avoiding groove, and the sliding bearing at the lower end of the bracket can slide in or slide out of the avoiding groove.

Preferably, the multi-purpose cart further comprises an auxiliary pedal, the auxiliary pedal is connected to the front end of the cart frame in a foldable and pivotal manner, and the auxiliary pedal has a horizontally-arranged unfolded state and a vertically-arranged folded state.

Preferably, the traction guide device further comprises a rotating shaft sleeve, the rotating shaft sleeve is horizontally pivoted to the lower end of the bogie, and the steering wheel is fixed on the rotating shaft sleeve; the driving mechanism comprises a motor, a transmission shaft and a speed reducer, the motor is fixed on one side of the bogie, the speed reducer is fixed on one side of the bogie, which is far away from the motor, and the input end and the output end of the speed reducer are both positioned on one side close to the bogie; the transmission shaft penetrates into the rotating shaft sleeve in a clearance mode, one end of the transmission shaft is fixedly connected to the output end of the motor, the other end of the transmission shaft is fixedly connected to the input end of the speed reducer, and the output end of the speed reducer is fixedly connected to the rotating shaft sleeve.

Preferably, the control device comprises an emergency stop braking signal triggering unit, a speed regulation signal triggering unit, a contactor unit and a controller unit with an E-ABS braking function, wherein a signal output end of the emergency stop braking signal triggering unit is connected with a mechanical braking signal input end of the controller unit, a mechanical braking signal output end of the controller unit is connected with a signal input end of the contactor unit, and a signal output end of the contactor unit is connected with a phase line of the motor; the signal output end of the speed regulation signal trigger unit is connected with the speed regulation signal detection input end of the controller unit, the Hall line of the controller unit is connected with the Hall line of the motor, and the phase line of the controller unit is connected with the phase line of the motor.

Preferably, the multi-functional carrier still includes mounting box, control handle, the upper end of control handle is bent forward and is extended formation installation department, the control handle is fixed in on the installation department, the mounting box is fixed in the installation department reaches on the control handle, scram brake signal trigger unit is for locating scram button on the mounting box, speed governing signal trigger unit is for locating speed governing on the control handle is changeed the handle.

Preferably, the speed reducer comprises a front cover, a rotation prevention disc, a box body, a rear cover, an input shaft and a primary planetary gear assembly located in the box body, wherein the front cover is fixedly closed at one end of the box body, and the rear cover is fixedly closed at the other end of the box body; the anti-rotation disc is fixed on the inner side of the front cover and is clamped in the box body in a circumferentially fixed manner; an inner gear ring is formed on the inner side of the box body, and the input shaft is pivoted on the rear cover and the front cover along the direction from the front cover to the rear cover; the primary planetary gear assembly comprises a first planetary gear carrier, a first sun gear and a first planetary gear set, wherein the first sun gear is fixed on the input shaft, the first planetary gear set is pivoted on the first planetary gear carrier along the circumferential distribution, the first sun gear is meshed with the inner side of the first planetary gear set, and the outer side of the first planetary gear set is meshed with the inner gear ring.

Preferably, the speed reducer further comprises a first friction pad, a second-stage planetary gear assembly, a second friction pad and a third-stage planetary gear assembly which are all located in the box body and sequentially distributed along the direction from the rear cover to the front cover, wherein the second-stage planetary gear assembly comprises a second planetary gear carrier, a second sun gear and a second planetary gear set, the second sun gear is fixed on the first planetary gear carrier, the second planetary gear set is pivoted on the second planetary gear carrier in a circumferentially distributed manner, the second sun gear is meshed with the inner side of the second planetary gear set, and the outer side of the second planetary gear set is meshed with the inner gear ring; the third planetary gear assembly comprises a third planetary gear carrier, a third sun gear and a third planetary gear set, wherein the third sun gear is fixed on the second planetary gear carrier, the third planetary gear set is pivoted on the third planetary gear carrier along the circumferential distribution, the third sun gear is meshed with the inner side of the third planetary gear set, and the outer side of the third planetary gear set is meshed with the inner gear ring; an output shaft sleeve extends from the third planetary gear carrier towards the direction far away from the second planetary gear carrier, the output shaft sleeve is pivoted on the front cover, and the output shaft sleeve is fixedly connected to the rotating shaft sleeve; the first friction pad frictionally collides between the first planetary gear carrier and the second planetary gear carrier, and the second friction pad frictionally collides between the second planetary gear carrier and the third planetary gear carrier; one end of the input shaft close to the front cover is pivoted on the output shaft sleeve, and the input shaft penetrates through the first planetary gear carrier, the second sun gear, the first friction gasket, the second planetary gear carrier, the third sun gear, the second friction gasket and the third planetary gear carrier in sequence in a clearance manner along the direction from the rear cover to the front cover; clamping teeth are formed on the outer edge of the anti-rotation disc and fixedly clamped on the inner gear ring.

Compared with the prior art, the bearing wheel of the multifunctional carrier is arranged at the rear end of the frame, and the bearing frame is vertically arranged on the frame; the lifting device is arranged on the frame, the output end of the lifting device is connected to the bearing frame, and the lifting device drives the bearing frame to vertically lift and move; the traction guide device comprises a steering wheel, a bogie and a driving mechanism, the bogie is vertically pivoted at the front end of the frame, the steering wheel is arranged at the lower end of the bogie, the driving mechanism is arranged on the bogie, and the output end of the driving mechanism is connected to the steering wheel in a transmission way; the control handle is arranged on the frame and can rotate horizontally and vertically; the operating handle is also connected with the upper end of the bogie and the input end of the hoisting device, the horizontal rotating operating handle can operate the horizontal pivoting of the bogie, and the vertical rotating operating handle can operate the vertical lifting of the hoisting device to the bearing frame; the power supply device is detachably arranged on the frame, the control device is electrically connected between the power supply device and the driving mechanism, and the control device controls the driving mechanism to drive the steering wheel to rotate, adjust the rotating speed and brake. The lifting device can be operated through the vertical rotating control handle, so that the lifting device drives the bearing frame to vertically lift and move, the bearing frame can lift and lower materials after being inserted into the bottom of the materials, the materials are automatically loaded and unloaded, and the materials are loaded and unloaded without manual handling; the power is supplied by the power supply device, the control device controls the driving mechanism to work, and the driving mechanism is controlled to drive the steering wheel to rotate to steer, adjust the rotating speed and brake, so that the frame is driven to move back and forth, the vehicle speed is adjusted and the vehicle is braked without being pulled by manpower; the steerable bogie is horizontally pivoted by a horizontal rotation steering, and steering operation can be flexibly performed. Can be more convenient laborsaving transport heavier material, remove in a flexible way, greatly reduced intensity of labour is big, the user is indefatigable, and is low to user's physical stamina requirement, and convenient to use is laborsaving, and the transport time and the manpower that have significantly reduced, efficiency improves greatly, is favorable to accelerating the engineering progress. Moreover, the structure is more simple firm, and is not fragile, and life prolongs greatly, has realized mechanized loading and unloading and has electrically ordered about the removal, and the function is more diversified, the engineering transport user demand of satisfying construction site and storage commodity circulation etc. that can be better.

Drawings

Fig. 1 is a perspective view of the combination of the multi-purpose cart according to the present invention.

Fig. 2 is an exploded schematic view of fig. 1.

FIG. 3 is a perspective view of the multi-purpose cart of the present invention from another perspective.

Fig. 4 is an exploded schematic view of fig. 3.

Fig. 5 is an assembled perspective view of the traction guide of the multi-purpose guided vehicle according to the present invention.

Fig. 6 is an exploded schematic view of fig. 5.

Fig. 7 is a block diagram showing the configuration of the control device of the multi-purpose transportation vehicle according to the present invention.

Fig. 8 is a structural view of an embodiment of a control device of the multi-purpose transport vehicle according to the present invention.

Fig. 9 is a brake control flowchart of the control device of the multi-purpose transportation vehicle according to the present invention.

Detailed Description

Embodiments of the present invention will now be described with reference to the drawings, wherein like element numerals represent like elements.

Referring to fig. 1 to 6, the multi-purpose truck 100 of the present invention includes a frame 20, a bearing wheel 30, a carriage 40, a lifting device (not shown), a traction guide 10, a handle 60, a power supply device (not shown), and a control device 200, wherein the bearing wheel 30 is disposed at a rear end of the frame 20. The bearing frame 40 vertically moves and is arranged on the frame 20, the lifting device is arranged on the frame 20, the output end of the lifting device is connected to the bearing frame 40, the lifting device drives the bearing frame 40 to vertically move up and down, and the material can be lifted and lowered after the bearing frame 40 is inserted into the bottom of the material. The traction guiding device 10 comprises a steering wheel 11, a bogie 12 and a driving mechanism 13, wherein the bogie 12 is vertically pivoted at the front end of the frame 20, the steering wheel 11 is arranged at the lower end of the bogie 12, the driving mechanism 13 is arranged on the bogie 12, and the output end of the driving mechanism 13 is in transmission connection with the steering wheel 11. The operating handle 60 is arranged on the frame 20, and the operating handle 60 can rotate horizontally and vertically; the operating handle 60 is further associated with the upper end of the bogie 12 and the input end of the lifting device, the horizontal rotating operating handle 60 can operate the horizontal pivoting of the bogie 12, the vertical rotating operating handle 60 can operate the vertical lifting carrier 40 of the lifting device, the power supply device is detachably arranged on the frame 20, the control device 200 is electrically connected between the power supply device and the driving mechanism 13, and the control device 200 controls the driving mechanism 13 to drive the steering wheel 11 to rotate, adjust the rotating speed and brake. The lifting device can be operated by vertically rotating the operating handle 60, so that the lifting device drives the bearing frame 40 to vertically lift and move, the bearing frame 40 can lift and lower materials after being inserted into the bottom of the materials, the materials can be automatically loaded and unloaded, and the materials are loaded and unloaded without manual handling; the power is supplied by the power supply device, the control device 200 controls the driving mechanism 13 to work, and the driving mechanism 13 is controlled to drive the steering wheel 11 to rotate to steer, adjust the rotating speed and brake, so that the frame 20 is driven to move back and forth, adjust the vehicle speed and brake without being pulled by manpower; the steering operation can be flexibly performed by operating the steering handle 60 to horizontally pivot the bogie 12. Can be more convenient laborsaving transport heavier material, remove in a flexible way, greatly reduced intensity of labour is big, the user is indefatigable, and is low to user's physical stamina requirement, and convenient to use is laborsaving, and the transport time and the manpower that have significantly reduced, efficiency improves greatly, is favorable to accelerating the engineering progress. Moreover, the structure is simpler and firmer, not fragile, and life prolongs greatly, has realized mechanized loading and unloading and has electrically driven the removal, and the function is more diversified. Specifically, the following:

referring to fig. 1 and 2, in the present embodiment, the lifting device is preferably a hydraulic ram 50, and the specific structure of the hydraulic ram 50 is well known to those skilled in the art, for example, the hydraulic ram 50 may be more specifically an oil pressure type hydraulic ram, but not limited thereto, and therefore, the details thereof are not described herein again. The hydraulic ram 50 in this embodiment has a housing 51, and an input ram 52, an output ram 53 and a pressure relief pedal 54 all disposed on the housing 51, and drives the input ram 52 to reciprocate, so that hydraulic oil can be pressed into a jacking cylinder body in the housing 51 to jack up the output ram 53; when the vehicle is required to descend, the output push rod 53 can be gradually lowered by pressing the pressure release pedal 54 to release the pressure. The shell 51 of the hydraulic jack 50 is vertically pivoted to the front end of the frame 20, and the shell 51 of the hydraulic jack 50 is fixedly connected to the upper end of the bogie 12; the lower end of the operating handle 60 is pivoted on the shell 51 of the hydraulic jack 50 around a horizontal axial lead, and the operating handle 60 can be vertically rotated to push the input mandril 52 of the hydraulic jack 50 to vertically move; the carriage 40 is horizontally rotatably connected to the output ram 53 of the hydraulic ram 50. That is, the horizontal rotation axis of the carriage 40, the axis of the output ram 53 of the ram 50, the axis of the vertically pivoted housing 51 of the ram 50, and the axis of the vertically pivoted bogie 12 coincide with each other. When the handle 60 is horizontally rotated, the handle 60 drives the housing 51 of the hydraulic ram 50 to rotate the bogie 12, thereby performing a steering operation. The vertical rotation operating handle 60 can push the input ram 52 of the hydraulic ram 50 to move vertically, so that the hydraulic oil can be pressed into the jacking cylinder body in the housing 51, and the output ram 53 jacks up to lift the carrier 40. The bearing frame 40 is horizontally and rotatably connected with the output mandril 53 of the hydraulic jack 50, so that the operating handle 60 cannot be hindered from driving the shell 51 of the hydraulic jack 50 to rotate, and meanwhile, the bearing frame 40 can be conveniently jacked up by the output mandril 53 of the hydraulic jack 50, so that the structure is more reasonable and compact.

Referring to fig. 1 to 4, the carriage 40 includes a bracket 41, a fork 42, a boom 43 and a pivot sleeve 44, the bracket 41 vertically slides on the frame 20, the fork 42 is fixed on the bracket 41 along the front-back direction, the lower end of the boom 43 is fixedly connected to the bracket 41, the upper end of the pivot sleeve 44 is pivoted to the upper end of the boom 43 around a horizontal axis, and the lower end of the pivot sleeve 44 is vertically pivoted to the output ram 53 of the hydraulic ram 50, so that the carriage 40 can be horizontally rotated and connected to the output ram 53 of the hydraulic ram 50, and the structure is simple and reasonable. In the present embodiment, the boom 43 is preferably an integrated L-shaped structure, which is more firm and has stronger load capacity.

In detail, in this embodiment, the fork 42 includes the horizontal fork board 421, the vertical connecting board 422 and the barb 423, the horizontal fork board 421 is fixed in the lower extreme of the vertical connecting board 422 along the fore-and-aft direction, and the included angle formed between the horizontal fork board 421 and the vertical connecting board 422 is preferably less than or equal to 90 °, and when the material is too heavy, the included angle formed between the horizontal fork board 421 and the vertical connecting board 422 can be prevented from changing too much and causing the material carried by the horizontal fork board 421 to slide backwards. The barb 423 is fixed in the upper end of vertical connecting plate 422, and vertical connecting plate 422 fixed connection is in the rear side of bracket 41, and the barb 423 block is fixed in the top of bracket 41 for crotch 42 structure is more firm, and can be more firm stable fix on bracket 41, has stronger load capacity. And can be conveniently forked or placed by the horizontal fork plate 421. In this embodiment, two forks 42 are preferably disposed on the bracket 41, and certainly, the specific number of forks 42 disposed on the bracket 41 is not limited thereto, and in other embodiments, the forks can be flexibly selected according to actual use requirements, and therefore, detailed description is omitted here.

Referring to fig. 1 to 4, the frame 20 includes a front frame 21, a protective cover 22, a fixing sleeve 23, a supporting arm 24 and a guiding rail 25, wherein an accommodating cavity 211 is formed on the front frame 21, the protective cover 22 can be opened and closed at the top of the accommodating cavity 211, the fixing sleeve 23 is fixed at the front side of the front frame 21, the supporting arm 24 is fixed on the front frame 21 along the front-back direction, and the guiding rail 25 is fixed on the front frame 21 along the vertical direction, so that the structure of the frame 20 is more stable and the installation of other components is facilitated.

Wherein, the lower end of the shell 51 of the hydraulic jack 50 and the upper end of the bogie 12 are both pivoted in the fixing sleeve 23, so that the pivoted mounting structure is more reasonable and compact, and is more firm and reliable. The front frame 21 is also fixed with a protective shell 26 surrounding the fixed sleeve 23, which not only protects the internal parts such as the fixed sleeve 23, but also protects the personal safety of the user and avoids being pinched and injured.

Meanwhile, the bearing wheel 30 is arranged at the rear end of the supporting arm 24, namely, the bearing wheel 30 is pivoted at the rear end of the supporting arm 24 around a horizontal axis. Optionally, in the present embodiment, a support arm 24 is disposed on each of the left and right sides of the front frame 21, and a bearing wheel 30 is disposed on each support arm 24, although the number of the support arms 24 and the bearing wheels 30 is not limited thereto, and in other embodiments, the number can be flexibly selected according to the use requirement, and therefore, the description thereof is omitted here.

Preferably, the power supply device is a rechargeable battery pack 70, the rechargeable battery pack 70 is detachably accommodated in the accommodating cavity 211, and when the rechargeable battery pack 70 is used up, the rechargeable battery pack can be conveniently detached and replaced, so that the rechargeable battery pack is more convenient to use.

Preferably, the bracket 41 is further provided with a sliding bearing 411, the guide rail 25 is provided with a vertically arranged guide groove 251 therein, and the sliding bearing 411 slides in the guide groove 251. Optionally, in this embodiment, two sliding bearings 411 arranged along the vertical direction are disposed on both left and right sides of the bracket 41, and correspondingly, the corresponding guide rails 25 are disposed on both left and right sides of the frame 20 for slidably mounting the sliding bearings 411, so as to reduce the sliding resistance, and make the vertical sliding of the bracket 41 on the frame 20 more smooth and convenient. Furthermore, the lower end of the side wall of the guide groove 251 near the front frame 21 is provided with an escape groove 252, and the sliding bearing 411 at the lower end of the bracket 41 can slide into or out of the escape groove 252. Then, when the horizontal fork plate 421 is needed to fork up the material, the output ram 53 of the hydraulic ram 50 releases the lift arm 43 and the bracket 41 to move downward, the sliding bearing 411 at the upper end of the bracket 41 slides downward in the guide groove 251, and under the action of the self gravity of the horizontal fork plate 421, the sliding bearing 411 at the lower end of the bracket 41 slides downward in the guide groove 251 into the escape groove 252, so that the lower end of the bracket 41 is inclined in the direction approaching the front frame 21, and the rear end of the horizontal fork plate 421 is inclined downward, so that the rear end of the horizontal fork plate 421 can be inserted under the rack loaded with the material more conveniently. After the horizontal fork plate 421 is inserted under the loading rack, the output ram 53 of the hydraulic ram 50 jacks up the boom 43 and the bracket 41 to move upward, the sliding bearing 411 at the upper end of the bracket 41 slides upward in the guide groove 251, the sliding bearing 411 at the lower end of the bracket 41 slides upward out of the escape groove 252 and slides into the guide groove 251 to continue sliding upward, so that the lower end of the bracket 41 swings away from the front frame 21 to return to a vertical position state, and simultaneously the rear end of the horizontal fork plate 421 swings upward to return to an initial position state, so that the horizontal fork plate 421 forks the material. Therefore, the included angle formed between the horizontal fork plate 421 and the vertical connecting plate 422 is preferably smaller than or equal to 90 degrees, so that the horizontal fork plate 421 can conveniently fork materials, and the heavier materials can be prevented from sliding and falling off the horizontal fork plate 421 in the running and moving process of the multifunctional truck 100.

Referring to fig. 1, the multi-purpose cart 100 further includes an auxiliary step 20a, the auxiliary step 20a is pivotally connected to the front end of the frame 20 in a retractable manner, and the auxiliary step 20a has a horizontally disposed unfolded state and a vertically disposed folded state. In the present embodiment, the auxiliary pedal 20a is specifically disposed on the front frame 21, and the auxiliary pedal 20a is disposed on both sides of the front frame 21. When the auxiliary step 20a is in the unfolded state (as shown in fig. 1), the user can conveniently stand on the auxiliary step 20a and move along with the multi-function cart 100 of the present invention, so as to further reduce the physical strength consumption of the user, and the use is more convenient and labor-saving. When a narrow turning road is encountered, the assist pedal 20a can be folded to a folded state to avoid collision with obstacles on the edge of the road, so that the vehicle can smoothly pass through the narrow turning road.

Referring to fig. 5 and 6, the traction guide device 10 further includes a rotating shaft sleeve 14, the rotating shaft sleeve 14 is horizontally pivoted to the lower end of the bogie 12, and the steering wheel 11 is fixed on the rotating shaft sleeve 14; specifically, the driving mechanism 13 includes a motor 131, a transmission shaft 132 and a speed reducer 133, the motor 131 is fixed on one side of the bogie 12, the speed reducer 133 is fixed on one side of the bogie 12 away from the motor 131, and an input end and an output end of the speed reducer 133 are both located on one side close to the bogie 12; the transmission shaft 132 is inserted into the rotating shaft sleeve 14 with a gap, one end of the transmission shaft 132 is fixedly connected to the output end 1311 of the motor 131, the other end of the transmission shaft 132 is fixedly connected to the input end of the speed reducer 133, and the output end of the speed reducer 133 is fixedly connected to the rotating shaft sleeve 14.

Fig. 7 is a block diagram of a control device 200 of the multifunctional transportation vehicle 100 according to the present invention, in which the control device 200 includes an emergency stop braking signal triggering unit 201, a speed regulation signal triggering unit 202, a contactor unit 203, and a controller unit 204 with an E-ABS braking function, a signal output terminal of the emergency stop braking signal triggering unit 201 is connected to a mechanical braking signal input terminal of the controller unit 204, a mechanical braking signal output terminal of the controller unit 204 is connected to a signal input terminal of the contactor unit 203, and a signal output terminal of the contactor unit 203 is connected to a phase line of the motor 131; the signal output end of the speed regulation signal trigger unit 202 is connected with the speed regulation signal detection input end of the controller unit 204, the hall line of the controller unit 204 is connected with the hall line of the motor 131, and the phase line of the controller unit 204 is connected with the phase line of the motor 131.

Referring to fig. 1 to 4 and fig. 8, a structure of an embodiment of a control device 200 of a multi-purpose cart 100 according to the present invention is shown, the multi-purpose cart 100 further includes a mounting box 80, a handle 90, a mounting portion 61 formed by bending and extending an upper end of the handle 60 forward, the handle 90 fixed to the mounting portion 61, the mounting box 80 fixed to the mounting portion 61 and the handle 90, and an emergency stop brake signal triggering unit 201 provided on the mounting box 80, for example, when a user uses the multi-purpose cart 100 according to the present invention, the user holds the handle 90 with both hands and tilts the handle 60 forward to make the mounting portion 61 and the mounting box 80 horizontal, and the emergency stop button 80a faces the user's body, when the user encounters an obstacle in front to block the user's forward movement, the user's body presses the emergency stop button 80a smoothly, generating an emergency stop brake signal, the controller unit 204 turns off the driving signal to the motor 131, and executes the power-off of the motor 131; meanwhile, the scram braking signal triggering unit 201 starts the contactor unit 203, so that three-phase lines of the motor 131 are short-circuited to realize braking, and the steering wheel 11 is braked to stop rotating, thereby preventing personal injury safety accidents to users. The multi-purpose van 100 of the present invention is more secure and reliable. It should be noted that, in this embodiment, the input ram 52 of the hydraulic ram 50 is driven to move constantly upward by the elastic force of an elastic member 55, so that when the user does not operate the operating handle 60 to tilt forward, the input ram 52 of the hydraulic ram 50 can push the operating handle 60 to return constantly to the vertical position, which is more convenient and reasonable for use, and in this embodiment, the elastic member 55 is specifically, but not limited to, a spring. The speed-regulating signal triggering unit 202 is a speed-regulating rotating handle 202a arranged on the control handle 90, when the speed-regulating rotating handle 202a is at an initial position (not operated and rotated), the controller unit 204 detects that the voltage of the speed-regulating signal is smaller than a preset voltage value, the controller unit 204 opens a three-phase lower bridge to short-circuit three-phase lines of the motor 131, and locks the motor 131, and the motor is in a state that the braking steering wheel 11 stops rotating, that is, when a user does not operate the speed-regulating rotating handle 202a to rotate, the steering wheel 11 is in a state that the steering wheel stops rotating, so that personal injury safety accidents to the user are prevented. The controller unit 204 in this embodiment is an MCU series embedded chip 204a, the contactor unit 203 is preferably an external relay 203a, and the motor 131 is preferably a brushless motor 131 a. Moreover, the specific connections between the MCU series embedded chip 204a and the emergency stop button 80a, the speed-adjusting knob 202a, the relay 203a, and the brushless motor 131a are conventional technologies well known to those skilled in the art, and therefore, the detailed description thereof is omitted here. Certainly, in other embodiments, the controller unit 204 may also adopt series of embedded chips such as PSOC, which are not limited to the above, and these chips have multiple sets of input/output ports, and the signal input/output ends of the emergency stop braking signal triggering unit 201, the speed regulation signal triggering unit 202, the contactor unit 203 and the motor 131 may be connected to different input/output ports of the controller unit 204, and then set and program, which are conventional technologies known by those skilled in the art, and therefore, the details are not described herein again.

Referring to fig. 5 and 6, the traction guide device 10 further includes a rotating shaft sleeve 14, the rotating shaft sleeve 14 is horizontally pivoted to the lower end of the bogie 12, and the steering wheel 11 is fixed on the rotating shaft sleeve 14; specifically, both ends of the rotating shaft sleeve 14 are pivotally connected to the lower end of the bogie 12 through the first bearing 142, and a positioning plate 141 is further fixedly disposed on the rotating shaft sleeve 14, and the positioning plate 141 may be a quincunx structure, but not limited thereto. The steering wheel 11 is fixed on the positioning plate 141, so that the structure that the steering wheel 11 is fixed on the rotating shaft sleeve 14 is realized, and the installation structure is more stable.

The driving mechanism 13 includes a motor 131, a transmission shaft 132 and a speed reducer 133, the motor 131 is fixed to one side of the bogie 12, a front end cover 1312 of the motor 131 further includes a water blocking ring 1312a and a water draining groove 1312b, the water blocking ring 1312a surrounds the output end 1311 of the motor 131, and the water draining groove 1312b vertically penetrates from the lower edge of the output end 1311 of the motor 131 to the bottom of the front end cover 1312 of the motor 131. So as to better play the role of water blocking and draining and better protect the motor 131. The reduction gear 133 is fixed in the one side that deviates from motor 131 on the bogie 12, and the input and the output of reduction gear 133 all are located the one side that is close to bogie 12 for motor 131 and the distribution that reduction gear 133 can be balanced are in bogie 12 both sides, and the load of bogie 12 both sides is more balanced, avoids appearing one side load overweight, and the too light unbalance phenomenon of opposite side load is more steady at directive wheel 11 operation in-process, and structural configuration is more reasonable.

Meanwhile, the transmission shaft 132 is inserted into the rotating shaft sleeve 14 with a gap, one end of the transmission shaft 132 is fixedly connected to the output end 1311 of the motor 131, the other end of the transmission shaft 132 is fixedly connected to the input end of the speed reducer 133, and the output end of the speed reducer 133 is fixedly connected to the rotating shaft sleeve 14. So that the rotation of the transmission shaft 132 and the rotation of the rotary shaft sleeve 14 do not interfere with each other and do not affect each other.

Referring to fig. 5 and 6, the reducer 133 includes a front cover 1331, an anti-rotation disk 1331a, a box 1332, a rear cover 1334, an input shaft 1335 and a first-stage planetary gear assembly 1336 located in the box 1332, wherein the front cover 1331 is fixedly closed at one end of the box 1332, and the rear cover 1334 is fixedly closed at the other end of the box 1332; the rotation preventing disc 1331a is fixed inside the front cover 1331, and the rotation preventing disc 1331a is circumferentially and fixedly engaged with the box 1332 to prevent the front cover 1331 and the box 1332 from rotating relatively, so that the front cover 1331 and the box 1332 can be more firmly and stably fixedly connected together. The anti-rotation disc 1331a may be fixed to the inner side of the front cover 1331 by welding or integral molding, and therefore, will not be described herein again. An annular gear (not shown) is formed inside the case 1332, and the input shaft 1335 is pivotally connected to the rear cover 1334 and the front cover 1331 in a direction from the front cover 1331 to the rear cover 1334. Preferably, in this embodiment, the output end 1311 of the motor 131 is formed with a first positioning groove 1311a, one end of the transmission shaft 132 close to the motor 131 is formed with a first positioning post 1321 which is in insertion fit with the first positioning groove 1311a in a circumferential positioning manner, one end of the transmission shaft 132 away from the motor 131 is formed with a second positioning groove 1322, one end of the input shaft 1335 close to the motor 131 is formed with a second positioning post 1335a which is in insertion fit with the second positioning groove 1322 in a circumferential positioning manner, so as to realize a structure that the transmission shaft 132 is fixedly transmitted between the output end 1311 and the input shaft 1335 of the motor 131. Preferably, the first positioning slot 1311a and the second positioning slot 1322 are both regular hexagonal grooves, and the first positioning column 1321 and the second positioning column 1335a are both regular hexagonal columns, so that the insertion and engagement structure for circumferential positioning is simpler and firmer, but not limited thereto, and will not be described herein again.

Referring to fig. 6, the primary planetary gear assembly 1336 includes a first planetary gear carrier 1336a, a first sun gear 1336b, and a first planetary gear set 1336c, wherein the first sun gear 1336b is fixed on the input shaft 1335, the first planetary gear set 1336c is pivoted to the first planetary gear carrier 1336a along the circumferential direction, the first sun gear 1336b is engaged with the inner side of the first planetary gear set 1336c, and the outer side of the first planetary gear set 1336c is engaged with the inner gear ring. Furthermore, the reducer 133 further includes a first friction pad 1339a, a second planetary gear assembly 1337, a second friction pad 1339b and a third planetary gear assembly 1338 which are all located in the box 1332 and sequentially distributed along the direction from the rear cover 1334 to the front cover 1331, the second planetary gear assembly 1337 includes a second planet carrier 1337a, a second sun gear 1337b and a second planetary gear set 1337c, the second sun gear 1337b is fixed on the first planet carrier 1336a, the second planetary gear set 1337c is pivotally connected to the second planet carrier 1337a along the circumferential direction, the second sun gear 1337b is engaged with the inner side of the second planetary gear set 1337c, and the outer side of the second planetary gear set 1337c is engaged with the inner gear ring. The third planetary gear assembly 1338 includes a third planetary gear carrier 1338a, a third sun gear 1338b and a third planetary gear set 1338c, the third sun gear 1338b is fixed on the second planetary gear carrier 1337a, the third planetary gear set 1338c is pivoted on the third planetary gear carrier 1338a along the circumferential distribution, the third sun gear 1338b is engaged with the inner side of the third planetary gear set 1338c, and the outer side of the third planetary gear set 1338c is engaged with the inner gear ring; the third planet carrier 1338a extends with an output shaft sleeve 1338d away from the second planet carrier 1337a, the output shaft sleeve 1338d is pivotally connected to the front cover 1331, preferably, the output shaft sleeve 1338d is pivotally connected to the front cover 1331 through a second bearing 1338f to reduce friction. And, still be provided with first oil blanket 1338g between output shaft sleeve 1338d and protecgulum 1331 to guarantee the leakproofness between output shaft sleeve 1338d and the protecgulum 1331, the structure is more reasonable. The output shaft 1338d is fixedly connected to the rotary shaft sleeve 14. Then, the input shaft 1335 drives the first sun gear 1336b to rotate, the first sun gear 1336b drives the first planetary gear set 1336c to rotate on the inner gear ring, and further drives the first planetary gear carrier 1336a to rotate, so as to realize the first-stage speed reduction and increase the torque; meanwhile, the second sun gear 1337b rotates synchronously with the first planetary gear carrier 1336a, and the second sun gear 1337b drives the second planetary gear set 1337c to rotate on the inner ring gear, thereby driving the second planetary gear carrier 1337a to rotate, realizing two-stage speed reduction and further increasing the torque; meanwhile, the third sun gear 1338b rotates synchronously with the second planet carrier 1337a, and the third sun gear 1338b drives the third planet gear set 1338c to rotate on the inner gear ring, which in turn drives the third planet carrier 1338a to rotate, so as to realize three-stage speed reduction and maximize torque, and the rotation shaft sleeve 1338d is used for transmitting the rotation speed and the torque output by the motor 131 to the rotation shaft sleeve 14, so that after the rotation speed and the torque are reduced by the reducer 133, a low-speed large torque is output, so that the steering wheel 11 can operate at a low speed, but a large torque is obtained, and a stronger power is used for dragging the frame 20 to move. Therefore, through the conversion of the reducer 133, the motor 131 with lower power can be selected to obtain large torque, so that the rechargeable battery pack 70 can be used for a longer time, the rechargeable battery pack 70 does not need to be replaced frequently, and the use is more energy-saving and convenient.

Preferably, the first friction pad 1339a rubs against the first planetary carrier 1336a and the second planetary carrier 1337a to reduce the friction between the first planetary carrier 1336a and the second planetary carrier 1337a, so that the rotation of the first planetary carrier 1336a and the second planetary carrier 1337a is not affected by each other, and the rotation is smoother. The second friction pads 1339b rub against the second planetary carrier 1337a and the third planetary carrier 1338a to reduce friction between the second planetary carrier 1337a and the third planetary carrier 1338a, so that the rotation of the second planetary carrier 1337a and the third planetary carrier 1338a is not affected by each other, and the rotation is smoother.

Furthermore, one end of the input shaft 1335 close to the front cover 1331 is pivotally connected to the output shaft 1338d, i.e. the input shaft 1335 is indirectly pivotally connected to the front cover 1331 through the output shaft 1338d, and the output shaft 1338d of the input shaft 1335 is coaxial with the output shaft. Preferably, the end of the input shaft 1335 near the front cover 1331 is pivotally connected to the output shaft 1338d through a third bearing 1335b to reduce friction. And, a second oil seal 1335d is also arranged between the input shaft 1335 and the output shaft sleeve 1338d to ensure the tightness between the input shaft 1335 and the output shaft sleeve 1338d, and the structure is more reasonable. The end of the input shaft 1335 remote from the front cover 1331 is pivotally connected to the rear cover 1334 by a fourth bearing 1335c to reduce friction. The input shaft 1335 is sequentially inserted into the first carrier 1336a, the second sun gear 1337b, the first friction pad 1339a, the second carrier 1337a, the third sun gear 1338b, the second friction pad 1339b and the third carrier 1338a with a gap in the direction from the rear cover 1334 to the front cover 1331, so that the input shaft 1335 does not interfere with the rotation of the first carrier 1336a, the second sun gear 1337b, the first friction pad 1339a, the second carrier 1337a, the third sun gear 1338b, the second friction pad 1339b and the third carrier 1338a, and the structure is more reasonable.

Preferably, the outer side of the output shaft sleeve 1338d is formed with positioning protruding strips 1338e distributed along the circumferential direction, and one end of the inner side of the rotating shaft sleeve 14 far away from the motor 131 is formed with positioning slots 143 engaged with the positioning protruding strips 1338e in a one-to-one corresponding manner in a clamping and positioning manner, so as to realize the structure that the output shaft sleeve 1338d is fixedly connected to the rotating shaft sleeve 14, and the fixedly connected structure is firmer and more reliable.

Preferably, in the embodiment, the anti-rotation disk 1331a has engaging teeth 1331b formed on an outer edge thereof, and the engaging teeth 1331b are fixedly engaged with the inner gear ring, so as to realize a structure that the anti-rotation disk 1331a is circumferentially fixed and engaged with the box 1332, and the structure is more reasonable and compact. Of course, the specific implementation structure of the anti-rotation disk 1331a that is circumferentially fixed and engaged with the box 1332 is not limited thereto, and it can also be implemented by other structures that are circumferentially engaged and positioned, and therefore, the detailed description thereof is omitted here.

The operation of the multi-purpose truck 100 of the present invention will be described in detail with reference to the accompanying drawings:

the input mandril 52 of the hydraulic jack 50 can be controlled to reciprocate by vertically rotating the control handle 60, so that hydraulic oil can be pressed into the jacking cylinder body in the shell 51, and the output mandril 53 jacks up the bearing frame 40; when the material loading and unloading device needs to descend, the output ejector rod 53 of the hydraulic jack 50 can drive the loading frame 40 to gradually descend as long as the pressure relief pedal 54 of the hydraulic jack 50 is pressed for pressure relief, the loading frame 40 can lift and descend the material after being inserted into the bottom of the material, the automatic loading and unloading of the material are achieved, and the material loading and unloading device does not need manual carrying to load and unload the material.

The power is supplied by the power supply device, the control device 200 controls the driving mechanism 13 to work, and the driving mechanism 13 is controlled to drive the steering wheel 11 to rotate to steer, adjust the rotating speed and brake, so that the frame 20 is driven to move back and forth, and the vehicle speed is adjusted and braked. The motor 131 drives the input shaft 1335 to drive the first sun gear 1336b to rotate through the transmission shaft 132, the first sun gear 1336b drives the first planetary gear set 1336c to rotate on the inner gear ring, and further drives the first planetary gear carrier 1336a to rotate, so as to realize first-stage speed reduction and increase torque; meanwhile, the second sun gear 1337b rotates synchronously with the first planetary gear carrier 1336a, and the second sun gear 1337b drives the second planetary gear set 1337c to rotate on the inner ring gear, thereby driving the second planetary gear carrier 1337a to rotate, realizing two-stage speed reduction and further increasing the torque; meanwhile, the third sun gear 1338b rotates synchronously with the second planet carrier 1337a, and the third sun gear 1338b drives the third planet gear set 1338c to rotate on the inner gear ring, which in turn drives the third planet carrier 1338a to rotate, so as to realize three-stage speed reduction and maximize torque, and the torque is transmitted to the rotating shaft sleeve 14 through the output shaft sleeve 1338d, so that the steering wheel 11 can operate at a low speed, but obtains a large torque. The steering operation can be flexibly performed by operating the steering handle 60 to horizontally pivot the bogie 12.

When the auxiliary step 20a is in the unfolded state (as shown in fig. 1), the user can conveniently stand on the auxiliary step 20a to move along with the multi-function cart 100 of the present invention. When a narrow turning road is encountered, the assist pedal 20a can be folded to the folded state. When the user meets an obstacle in front of the user to block the user from moving forward, the body of the user presses the emergency stop button 80a, so that the driving mechanism 13 immediately brakes the steering wheel 11 to stop rotating, and personal injury safety accidents to the user are prevented.

Fig. 9 is a brake control flowchart of the control device 200 of the multi-purpose truck 100 according to the present invention, and the specific brake control steps of the control device 200 are as follows:

s00: the controller unit 204 and related functions are initialized;

s01: the controller unit 204 determines whether an emergency stop braking signal is transmitted to the mechanical braking signal input end of the controller unit 204 at the signal output end of the emergency stop braking signal triggering unit 201, and if not, executes step S05; if yes, go to step S02;

s02: the controller unit 204 turns off the driving signal to the motor 131, and performs power-off of the motor 131; meanwhile, the emergency stop brake signal triggering unit 201 starts the contactor unit 203, so that three phase lines of the motor 131 are short-circuited, and braking is realized; then step S03 is executed;

s03: the controller unit 204 detects whether the emergency stop braking signal disappears, and if not, the controller unit 204 continues to detect whether the emergency stop braking signal disappears; if yes, go to step S04;

s04: the emergency stop braking signal triggering unit 201 closes the contactor unit 203, so that the three-phase line of the motor 131 is disconnected, and braking is stopped; then step S01 is executed;

s05: the controller unit 204 detects whether the voltage of the speed regulation signal sent by the speed regulation signal trigger unit 202 is greater than a preset voltage value, and if so, executes other set operations; if not, go to step S06; in this embodiment, the preset voltage value is 1.2V, but not limited thereto;

s06: the controller unit 204 determines whether the rotating speed of the motor 131 is less than a preset rotating speed value through the obtained hall signal of the motor 131, and if not, executes step S07; if yes, go to step S08; in the present embodiment, the preset rotation speed value is 200r/m, but not limited thereto;

s07: the controller unit 204 starts the E-ABS brake motor 131 to decelerate while executing step S06;

s08: the controller unit 204 opens the three-phase lower bridge to short-circuit the three-phase lines of the motor 131, locks the motor 131 and realizes braking; after braking, step S09 is executed;

s09: the controller unit 204 detects whether the voltage of the speed-adjusting signal sent by the speed-adjusting signal triggering unit 202 is greater than a preset voltage value, if not, the controller unit 204 continues to open the three-phase lower bridge, so that the three-phase line of the motor 131 is short-circuited, the motor 131 is locked, and braking is maintained; if yes, go to step S10;

s10: the controller unit 204 turns off the three-phase lower axle, exits the lock motor 131 routine, and executes step S01.

Moreover, when the controller unit 204 is damaged and cannot work normally, the emergency stop and brake signal triggering unit 201 can directly open the contactor unit 203, so that the three-phase line of the motor 131 is short-circuited, and braking is realized. Multiple safety guarantee is realized, and the method is safer and more reliable.

Furthermore, the controller unit 204 controls the rotation speed of the motor 131 by detecting the voltage of the speed-adjusting signal through the controller unit 204 to match the corresponding rotation speed according to a set program, and the rotation direction of the motor 131 is controlled by a commutation signal triggered by a commutation switch (not shown) connected to the controller unit 204 to switch the rotation direction of the motor 131. The diverter switch is also preferably provided on the handlebar 90 for easy manipulation by the user. The specific implementation of the controller unit 204 for controlling the rotation speed and the rotation direction of the motor 131 is common knowledge of those skilled in the art, and therefore, will not be described herein again.

Compared with the prior art, the bearing wheel 30 of the multifunctional transportation vehicle 100 of the invention is arranged at the rear end of the frame 20, and the bearing frame 40 is vertically arranged on the frame 20; the lifting device is arranged on the frame 20, the output end of the lifting device is connected to the bearing frame 40, and the lifting device drives the bearing frame 40 to vertically move up and down; the traction guide device 10 comprises a steering wheel 11, a bogie 12 and a driving mechanism 13, wherein the bogie 12 is vertically pivoted at the front end of the frame 20, the steering wheel 11 is arranged at the lower end of the bogie 12, the driving mechanism 13 is arranged on the bogie 12, and the output end of the driving mechanism 13 is in transmission connection with the steering wheel 11; the operating handle 60 is arranged on the frame 20, and the operating handle 60 can rotate horizontally and vertically; the handle 60 is also associated with the upper end of the truck 12 and the input end of the lifting device, the horizontal rotation handle 60 operates the horizontal pivoting of the truck 12, and the vertical rotation handle 60 operates the vertical lifting of the carrier 40 by the lifting device; the power supply device is detachably arranged on the frame 20, the control device 200 is electrically connected between the power supply device and the driving mechanism 13, and the control device 200 controls the driving mechanism 13 to drive the steering wheel 11 to rotate for steering, rotating speed adjustment and braking. The lifting device can be operated by vertically rotating the operating handle 60, so that the lifting device drives the bearing frame 40 to vertically lift and move, the bearing frame 40 can lift and lower materials after being inserted into the bottom of the materials, the materials can be automatically loaded and unloaded, and the materials are loaded and unloaded without manual handling; the power is supplied by the power supply device, the control device 200 controls the driving mechanism 13 to work, and the driving mechanism 13 is controlled to drive the steering wheel 11 to rotate to steer, adjust the rotating speed and brake, so that the frame 20 is driven to move back and forth, adjust the vehicle speed and brake without being pulled by manpower; the steering operation can be flexibly performed by operating the steering handle 60 to horizontally pivot the bogie 12. Can be more convenient laborsaving transport heavier material, remove in a flexible way, greatly reduced intensity of labour is big, the user is indefatigable, and is low to user's physical stamina requirement, and convenient to use is laborsaving, and the transport time and the manpower that have significantly reduced, efficiency improves greatly, is favorable to accelerating the engineering progress. Moreover, the structure is more simple firm, and is not fragile, and life prolongs greatly, has realized mechanized loading and unloading and has electrically ordered about the removal, and the function is more diversified, the engineering transport user demand of satisfying construction site and storage commodity circulation etc. that can be better.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.

Claims

1. A multi-functional carrier, characterized by, includes:

a frame;

the bearing wheel is arranged at the rear end of the frame;

the bearing frame is vertically arranged on the frame in a moving manner;

the traction guide device comprises a steering wheel, a bogie and a driving mechanism, the bogie is vertically pivoted at the front end of the frame, the steering wheel is arranged at the lower end of the bogie, the driving mechanism is arranged on the bogie, and the output end of the driving mechanism is in transmission connection with the steering wheel; the traction guide device also comprises a rotating shaft sleeve, the rotating shaft sleeve is horizontally pivoted at the lower end of the bogie, and the steering wheel is fixed on the rotating shaft sleeve; the driving mechanism comprises a motor, a transmission shaft and a speed reducer, the motor is fixed on one side of the bogie, the speed reducer is fixed on one side of the bogie, which is far away from the motor, and the input end and the output end of the speed reducer are both positioned on one side close to the bogie; the transmission shaft penetrates into the rotating shaft sleeve in a clearance mode, one end of the transmission shaft is fixedly connected to the output end of the motor, the other end of the transmission shaft is fixedly connected to the input end of the speed reducer, and the output end of the speed reducer is fixedly connected to the rotating shaft sleeve;

the power supply device is detachably arranged on the frame; and

the control device is electrically connected between the power supply device and the driving mechanism and controls the driving mechanism to drive the steering wheel to rotate, adjust the rotating speed and brake; the control device comprises an emergency stop braking signal trigger unit, a speed regulation signal trigger unit, a contactor unit and a controller unit with an E-ABS braking function, wherein the signal output end of the emergency stop braking signal trigger unit is connected with the mechanical braking signal input end of the controller unit, the mechanical braking signal output end of the controller unit is connected with the signal input end of the contactor unit, and the signal output end of the contactor unit is connected with a phase line of the motor; the signal output end of the speed regulating signal trigger unit is connected with the speed regulating signal detection input end of the controller unit, the Hall line of the controller unit is connected with the Hall line of the motor, and the phase line of the controller unit is connected with the phase line of the motor;

the brake control step flow of the control device is as follows:

s00: initializing the function of the controller unit;

s01: the controller unit judges whether an emergency stop brake signal is transmitted to a mechanical brake signal input end of the controller unit from a signal output end of the emergency stop brake signal trigger unit, and if not, the step S05 is executed; if yes, go to step S02;

s02: the controller unit turns off a driving signal to the motor and executes the motor power-off; meanwhile, the emergency stop brake signal trigger unit starts the contactor unit to short-circuit three-phase lines of the motor, so that braking is realized; then step S03 is executed;

s03: the controller unit detects whether the emergency stop braking signal disappears, and if not, the controller unit continues to detect whether the emergency stop braking signal disappears; if yes, go to step S04;

s04: the emergency stop braking signal triggering unit closes the contactor unit to disconnect the three-phase line of the motor and stop braking; then step S01 is executed;

s05: the controller unit detects whether the voltage of the speed regulating signal sent by the speed regulating signal trigger unit is greater than a preset voltage value, and if so, executes other set operations; if not, go to step S06;

s06: the controller unit judges whether the rotating speed of the motor is smaller than a preset rotating speed value or not through the obtained motor Hall signal, and if not, the step S07 is executed; if yes, go to step S08;

s07: the controller unit starts the E-ABS brake motor to decelerate, and simultaneously executes the step S06;

s08: the controller unit opens the three-phase lower bridge to enable three phase lines of the motor to be in short circuit, the motor is locked, and braking is achieved; after braking, step S09 is executed;

s09: the controller unit detects whether the speed regulating signal voltage sent by the speed regulating signal trigger unit is greater than a preset voltage value, if not, the controller unit continues to open the three-phase lower bridge, so that three phase lines of the motor are in short circuit, the motor is locked, and braking is maintained; if yes, go to step S10;

s10: the controller unit turns off the three-phase lower axle, exits the lock motor routine, and executes step S01.

2. The multi-purpose cart of claim 1, wherein said lifting device is a hydraulic ram having a housing vertically pivotally connected to a front end of said frame, said hydraulic ram housing fixedly attached to an upper end of said truck; the lower end of the operating handle is pivoted on the shell of the hydraulic jack around a horizontal axial lead, and the input ejector rod of the hydraulic jack can be pushed to vertically move by vertically rotating the operating handle; the bearing frame can be horizontally and rotatably connected with an output mandril of the hydraulic jack.

3. The multi-purpose cart of claim 2, wherein said carriage comprises a carriage vertically slidable on said frame, a fork fixed to said carriage in a fore-and-aft direction, a boom having a lower end fixedly attached to said carriage, and a pivot sleeve having an upper end pivotally attached to an upper end of said boom about a horizontal axis, and a lower end vertically attached to an output ram of said hydraulic ram.

4. The multi-purpose cart according to claim 3, wherein said fork comprises a horizontal fork plate fixed to a lower end of said vertical connection plate in a front-rear direction, a vertical connection plate fixed to an upper end of said vertical connection plate, and a barb fixed to a rear side of said rack, said barb being snap-fitted to a top of said rack.

5. The multi-purpose cart according to claim 3, wherein said cart frame comprises a front frame, a protection cover, a fixing cover, a support arm and a guide rail, said front frame having a receiving cavity formed therein, said protection cover being openable and closable to a top of said receiving cavity, said fixing cover being fixed to a front side of said front frame, said support arm being fixed to said front frame in a front-rear direction, said guide rail being fixed to said front frame in a vertical direction; the lower end of the shell of the hydraulic jack and the upper end of the bogie are both pivoted in the fixed sleeve, and the bearing wheel is arranged at the rear end of the supporting arm; the power supply device is a rechargeable battery pack which is detachably accommodated in the accommodating cavity; the bracket is also provided with a sliding bearing, a guide groove which is vertically arranged is formed in the guide rail, and the sliding bearing slides in the guide groove; the lower end of the side wall of the guide groove, which is close to one side of the front frame, is provided with an avoiding groove, and the sliding bearing at the lower end of the bracket can slide in or slide out of the avoiding groove.

6. The multi-purpose cart of any one of claims 1 to 5, further comprising an auxiliary step pivotally connected to said frame in a retractable manner, said auxiliary step having a horizontally disposed deployed position and a vertically disposed stowed position.

7. The multi-purpose cart of claim 1, further comprising a mounting box and a handle bar, wherein the handle bar is bent forward to form a mounting portion, the handle bar is fixed to the mounting portion, the mounting box is fixed to the mounting portion and the handle bar, the emergency stop and brake signal triggering unit is an emergency stop button disposed on the mounting box, and the speed control signal triggering unit is a speed control knob disposed on the handle bar.

8. The multi-purpose cart of claim 1, wherein said speed reducer comprises a front cover, a rotation prevention plate, a housing, a rear cover, an input shaft, and a primary planetary gear assembly located in said housing, said front cover being fixedly closed at one end of said housing, said rear cover being fixedly closed at the other end of said housing; the anti-rotation disc is fixed on the inner side of the front cover and is clamped in the box body in a circumferentially fixed manner; an inner gear ring is formed on the inner side of the box body, and the input shaft is pivoted on the rear cover and the front cover along the direction from the front cover to the rear cover; the primary planetary gear assembly comprises a first planetary gear carrier, a first sun gear and a first planetary gear set, wherein the first sun gear is fixed on the input shaft, the first planetary gear set is pivoted on the first planetary gear carrier along the circumferential distribution, the first sun gear is meshed with the inner side of the first planetary gear set, and the outer side of the first planetary gear set is meshed with the inner gear ring.

9. The multi-purpose cart of claim 8, wherein said speed reducer further comprises a first friction pad, a second planetary gear assembly, a second friction pad, and a third planetary gear assembly, all disposed in said housing and sequentially arranged along a direction from said rear cover to said front cover, said second planetary gear assembly comprises a second planetary gear carrier, a second sun gear, a second planetary gear set, said second sun gear is fixed on said first planetary gear carrier, said second planetary gear set is pivotally connected to said second planetary gear carrier along a circumferential direction, said second sun gear is engaged with an inner side of said second planetary gear set, and an outer side of said second planetary gear set is engaged with said inner gear ring; the third planetary gear assembly comprises a third planetary gear carrier, a third sun gear and a third planetary gear set, wherein the third sun gear is fixed on the second planetary gear carrier, the third planetary gear set is pivoted on the third planetary gear carrier along the circumferential distribution, the third sun gear is meshed with the inner side of the third planetary gear set, and the outer side of the third planetary gear set is meshed with the inner gear ring; an output shaft sleeve extends from the third planetary gear carrier towards the direction far away from the second planetary gear carrier, the output shaft sleeve is pivoted on the front cover, and the output shaft sleeve is fixedly connected to the rotating shaft sleeve; the first friction pad frictionally collides between the first planetary gear carrier and the second planetary gear carrier, and the second friction pad frictionally collides between the second planetary gear carrier and the third planetary gear carrier; one end of the input shaft close to the front cover is pivoted on the output shaft sleeve, and the input shaft penetrates through the first planetary gear carrier, the second sun gear, the first friction gasket, the second planetary gear carrier, the third sun gear, the second friction gasket and the third planetary gear carrier in sequence in a clearance manner along the direction from the rear cover to the front cover; clamping teeth are formed on the outer edge of the anti-rotation disc and fixedly clamped on the inner gear ring.