CN212251005U - Chain transmission stepless speed change device - Google Patents
Chain transmission stepless speed change device Download PDFInfo
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- CN212251005U CN212251005U CN202020448992.5U CN202020448992U CN212251005U CN 212251005 U CN212251005 U CN 212251005U CN 202020448992 U CN202020448992 U CN 202020448992U CN 212251005 U CN212251005 U CN 212251005U
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 33
- 238000006073 displacement reaction Methods 0.000 claims description 22
- 230000000694 effects Effects 0.000 claims description 4
- 230000005484 gravity Effects 0.000 claims description 3
- 239000010720 hydraulic oil Substances 0.000 claims description 3
- 238000005491 wire drawing Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
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Abstract
The utility model discloses a machinery field chain drive infinitely variable speed device, it mainly includes slide base plate system, sliding support system, speed governing conical disk and control system, chain and main shaft transmission system, and during sliding support arranged the ball spout of slide base plate in through the ball, the sprocket was installed to the support, through the radial position of control support on the slide base plate, changed the working radius of sprocket group to realize the infinitely variable speed purpose. The utility model overcomes metal V takes the big moment of torsion ability of friction formula infinitely variable transmission to transmit weak and have certain friction loss's shortcoming, can realize big moment of torsion infinitely variable function betterly in design variable speed scope, especially can change speed smoothly continuously, can open loop control, also can closed loop control, and the infinitely variable control to machinery field, especially automobile field's infinitely variable control has special meaning.
Description
Technical Field
The utility model relates to a mechanical stepless speed change device especially relates to a chain drive stepless speed change device.
Background
The speed change device is an important device in the mechanical field, and is divided into a step speed change device and a stepless speed change device from a speed change mode, and the ideal speed change device is a stepless speed change device which can realize continuous smooth speed change, but relatively complicated stepless speed change and hydraulic transmission, but has lower mechanical efficiency, and motor transmission can also be realized, but the speed change device is used in an electric power system. At present, a mechanical stepless speed change device is mainly a metal V-belt friction type stepless speed change device, but because the friction force of a metal V belt is utilized to transmit power, the capability of transmitting large torque is weak, certain friction loss exists, the reliability is also poor, and the mechanical stepless speed change device is generally used in a system with relatively small power.
SUMMERY OF THE UTILITY MODEL
The technical problem solved by the utility model is to provide a stepless speed change device of chain transmission power, overcome metal V and taken the big moment of torsion ability of friction formula stepless speed change device transmission weak point and have certain friction loss's shortcoming, can realize big moment of torsion stepless speed change function betterly at design speed change scope.
The utility model discloses a realize above-mentioned chain drive infinitely variable function through following technical scheme: a chain-driven stepless speed variator is composed of slide base disc system, slide supporter, chain wheel system, speed regulating conic disc and control system, chain and mainshaft drive system.
The slide base plate system is one of the main devices of power input, output and intermediate power transmission, and is configured in pairs, two are a pair, one is power input and the other is power output, and can be cascaded, the output of the previous pair is used as the input of the next pair, the more the cascade number is, the larger the stepless speed change range is, and the total speed change ratio is the product of all stages of speed change ratios.
The sliding support and chain wheel system is a chain wheel group supported by the sliding support, and mainly comprises a main sliding support, a secondary sliding support, a main chain wheel, a secondary chain wheel, a chain wheel limit nut, a chain wheel tension spring and the like.
The speed regulating conic disc and control system as the main speed regulating controller consists of conic disc, bearing, displacement support, speed regulating pull wire, displacement controller, etc.
The chain and main shaft transmission system is a main device for power input, power intermediate transmission and power output, and mainly consists of input shaft, output shaft, intermediate transmission shaft (two-pair or more linkage system), chain, guide chain wheel and tension chain wheel.
Preferably, the sliding base plate is a cylindrical disc with a plurality of groups of ball sliding grooves arranged in the radial direction, a spline shaft hole arranged in the center, and a shaft neck and a fixed pulley hole seat arranged at corresponding positions at one axial end.
Preferably, the main sliding support is a combination body provided with a conical disc sliding surface, a ball sliding groove, a main chain wheel shaft, a main chain wheel limiting block, a wire pulling hole seat, a tension spring hole seat and the like, wherein the main chain wheel is a special chain wheel and is arranged on the main chain wheel shaft, part of the excircle of the chain wheel is provided with chain teeth, the number of the chain teeth is generally three to five, the central tooth is taken as a radial central line (normal line), the chain wheels at two sides of the central line are symmetrically provided with rotating limiting blocks, the corresponding positions of the main chain wheel shaft are also provided with the rotating limiting blocks, the main chain wheel and the chain wheel shaft are limited to rotate relatively in a positive direction or a reverse direction within a set angle range, and the chain wheel shaft is rigidly connected with the sliding support, so that the main chain wheel can play a role of supporting the chain to radially expand (contract) the diameter, and can play a role of tooth chain combination transmission power, and simultaneously, the main chain wheel, the tension spring hook hole is arranged, the main chain wheel and the support are elastically positioned by the chain wheel tension spring, when the main chain wheel is not meshed with the chain, the main chain wheel and the rotating centrifugal force of the chain wheel jointly act, the gravity center of the whole main chain wheel is positioned on the central tooth as a central line (normal line) and leans against the tooth side of the chain, and therefore the tooth when the main chain wheel is meshed with the chain is a middle tooth or a middle side tooth conveniently.
Preferably, the auxiliary sliding support is substantially the same as the main sliding support, except that the auxiliary sliding support is not provided with a limit block, and the auxiliary chain wheel is not provided with a rotation limit block as the main chain wheel, and the rest parts are the same.
Preferably, the speed regulation cone disc and the control system, the speed regulation cone disc is a disc with a cone angle of 45 degrees with the axis, a slideway is arranged on the conical surface and a speed regulation stay wire hole seat is arranged at the corresponding position, the slideway and the hole seat respectively correspond to the ball sliding groove of the sliding base disc, a bearing is arranged on the speed regulation cone disc and is connected with a displacement support for controlling the displacement through the bearing, the main shaft of the displacement support is a hollow shaft so as to conveniently arrange a middle shaft to be connected with the corresponding sliding base disc, a displacement control device is a device for controlling the displacement of the cone disc through external mechanical force (can be driven by a hydraulic oil cylinder, a hydraulic oil pump, a motor and the like and has a self-locking function), the function of the speed regulation cone disc is that when the speed regulation cone disc axially moves, the cone disc slideway tightly pushes the sliding surface of the sliding support cone disc to jointly act with the speed regulation stay wire, thereby controlling, thereby adjusting the rotating diameter of the chain wheel rotating group and achieving the purpose of speed regulation.
Preferably, in the chain and spindle transmission system, the input shaft is connected with the power input sliding base discs, the intermediate transmission shaft is used for connecting two or more pairs of intermediate transmission sliding base discs (arranged in the hollow conical disc bracket), the output shaft is connected with the power output sliding base discs, each pair of chains is mutually linked with each pair of sliding base disc chaining wheel sets, a guide chain wheel is arranged on the tight edge of each chain and fixed on the machine base to change the direction of the chains so as to improve the meshing effect of chain teeth, and a tensioning chain wheel is arranged on the loose edge of each chain and elastically connected with the machine base while ensuring the meshing direction with the chains so as to ensure that the length of the chains can meet the system requirements in all speed change ranges.
The utility model discloses positive progress effect lies in: the chain-driven stepless speed change device can be used in various mechanical devices requiring speed change, in particular in the field of automobiles, is connected with a planetary gear speed changer, can realize forward and reverse control, improves the speed change ratio range, can adapt to a larger torque system, has higher mechanical efficiency, can change speed smoothly and continuously, can be controlled in an open loop mode and a closed loop mode, and is simple and reliable in speed change control.
Drawings
Fig. 1 is a schematic structural view of a two-pair six-chute chain transmission stepless speed change device.
Fig. 2 is a schematic view of a single slider base plate.
Fig. 3 is a schematic structural view of a single main sliding bracket.
Fig. 4 is a schematic view of a single pair of sliding supports.
FIG. 5 is a schematic view of a single main sprocket configuration.
FIG. 6 is a schematic view of a single pair sprocket arrangement.
Fig. 7 is a schematic structural diagram of a speed regulation conical disc.
Fig. 8 is a schematic diagram of the deceleration effect.
Fig. 9 is a schematic diagram of the speed increasing effect.
Detailed Description
The following provides a preferred embodiment of the present invention with reference to the accompanying drawings to explain the technical solutions of the present invention in detail.
Fig. 1 shows a schematic structural diagram of a chain-driven stepless transmission with two pairs of six sliding chutes, which mainly comprises an input shaft 101, four sliding bases 102, 105, 112, 115, four speed-adjusting conical discs 103, 104, 113, 114, one of two main sliding brackets 106 (eight in total) on each sliding base, one of four pairs of sliding brackets 107 on each sliding base, an output shaft 108, a hydraulic motor 109, one of two displacement brackets 110, balls 111 of sliding base chutes of balls, six speed-adjusting pull wires 116 in each group, two sprocket tension springs 117 on each sprocket, one of two tension sprockets 118, one of two guide sprockets 119, one of two guide sprockets, two tight sides of two chains, one of two chains 120, six sliding chutes of sliding bases arranged at 60 degrees symmetrically, two main sliding brackets arranged on the diagonal of the sliding bases, mutually forming 180 degrees, four pairs of sliding supports are arranged, and the main sliding support and the adjacent pair of sliding supports form an angle of 60 degrees with each other.
Fig. 2 shows a schematic structural diagram of a single six-groove sliding base plate, which mainly comprises a sliding base plate journal 201, one of six ball sliding grooves 202 symmetrically arranged at 60 degrees on the circumference, a ball baffle fixing screw hole 203, and a speed-regulating wire-pulling turning pulley seat hole 204.
As shown in fig. 3, the main sliding bracket mainly includes a combination of a ball chute 301, a main sprocket rotation limiting block 302, a main sprocket shaft 303, a speed-adjusting wire-drawing hole seat 304, a sprocket tension spring hole seat 305, a conical disc sliding surface 306, and the like.
Fig. 4 is a schematic structural view of the secondary sliding support, which is substantially the same as the primary sliding support except that the position of the limiting block is a cylindrical platform 401.
Fig. 5 is a schematic structural diagram of a main sprocket, which mainly comprises a rotation limiting block 501, a sprocket 502, a sprocket tension spring hole seat 503, and the like.
As shown in FIG. 6, the structure of the auxiliary chain wheel is the same as that of the main chain wheel except that no rotation limiting block is provided.
Fig. 7 is a schematic structural diagram of a speed regulation cone disc, which is a cone disc assembly with a cone surface of 45 degrees and is composed of a speed regulation stay wire hole seat 701, a bearing seat 702, a slideway 703 and the like.
The working principle of the utility model is as follows: as shown in fig. 1, the displacement control device controls the hydraulic motor 107 to rotate, the displacement bracket 108 is driven to move by the gear (the displacement bracket is supported on the machine base by the slide block), the speed regulation conical disc moves on the displacement bracket by the action of the speed regulation conical disc bearing, the main (pair) sliding bracket is driven to move radially on the sliding base disc by the ball 111 (the displacement of the displacement bracket is the same as the radial displacement of each sliding bracket because the taper of the speed regulation conical disc is 45 degrees), and the main chain wheel and the pair chain wheel are both arranged on the chain wheel shaft of each main (pair) sliding bracket, so that the working radius of the chain wheel group on each sliding base disc is changed, the chain wheel group of each pair of sliding base discs is changed in diameter, one side is increased in diameter, the other side is decreased (shown in fig. 7 and 8), and under the action of the chain, thereby achieving the purpose of stepless speed regulation.
In the operation process, the speed regulating conical disc and the bracket chain wheel group on each sliding base disc rotate at the same speed. The chain transmits power by a main chain wheel in an engagement area in a chain wheel group, and the main chain wheel can transmit power because a rotation limiting block of the main chain wheel is combined with a limiting block on a main chain wheel shaft to limit the main chain wheel to rotate on the chain wheel shaft, and because two main chain wheels in each group of chain wheels are distributed at 180 degrees, one main chain wheel in a working area every week is ensured under the action of a guide chain wheel. When each chain wheel works, the chain wheel and the chain are disengaged and separated by an angle every time the chain wheel group rotates for one circle, and at the moment, under the combined action of a chain wheel tension spring (symmetrically arranged on the chain wheel) and the centrifugal force of the chain wheel (the gravity center on the chain wheel is at the toothed end), the central teeth of the chain tooth area are basically arranged on the intersection point of the rotation normal line and the radial direction, so that conditions are created for meshing with the chain again.
In the whole system of fig. 1, a slide base plate 102 is connected with an input shaft 101, a slide base plate 105 is connected with an output shaft 108, and a slide base plate 115 is connected with a slide base plate 112 through an intermediate transmission shaft. The power transmission and speed change process is that the input shaft 101 transmits power to the sliding base plate 102, the chain transmits the power to the sliding base plate 115, the intermediate transmission shaft transmits the power to the sliding base plate 112, the chain transmits the power to the sliding base plate 105 and the output shaft 108, and therefore the speed change purpose is achieved.
Claims (6)
1. A chain transmission stepless speed change device is characterized by mainly comprising a sliding seat base disc system, a sliding support, a chain wheel system, a speed regulation conical disc, a control system, a chain and a main shaft transmission system;
the slide base plate system is one of the main devices of power input, output and middle power transmission, and is configured in pairs, wherein two are a pair, one is power input, the other is power output, and the output of the previous pair is used as the input of the next pair, the more the cascade number is, the larger the stepless speed change range is, and the total speed change ratio is the product of all stages of speed change ratios;
the sliding support and chain wheel system is a chain wheel group supported by the sliding support, and mainly comprises a main sliding support, a secondary sliding support, a main chain wheel, a secondary chain wheel, a chain wheel limit nut, a chain wheel tension spring and the like;
the speed regulation conical disc and the control system are main control devices for speed regulation, and comprise a conical disc, a bearing, a displacement bracket, a speed regulation pull wire, a displacement control device and the like;
the chain and main shaft transmission system is the main device for power input, power intermediate transmission and power output, and is mainly formed from input shaft, output shaft, intermediate transmission shafts of two pairs of cascade systems or more, chain, guide chain wheel and tension chain wheel.
2. The chain-driven continuously variable transmission as claimed in claim 1, wherein the slider base is a cylindrical disk having a plurality of sets of ball runners arranged in a radial direction, a splined shaft hole arranged at a center, a journal arranged at a corresponding position at one end in an axial direction, and a fixed pulley hole seat.
3. The chain transmission stepless speed change device according to claim 1, wherein the main sliding bracket is a combination of a conical pulley sliding surface, a ball sliding groove, a main sprocket shaft, a main sprocket limiting block, a wire pulling hole seat, a tension spring hole seat, etc., wherein the main sprocket is a special sprocket, which is mounted on the main sprocket shaft, and has sprocket teeth arranged on a part of the outer circumference of the sprocket, the number of the sprocket teeth is generally three to five, the central tooth is taken as a radial central line, the rotation limiting blocks are symmetrically arranged on the sprocket wheels on both sides of the central line, the rotation limiting block is also arranged at the corresponding position of the main sprocket shaft, the main sprocket and the sprocket shaft are limited to be capable of rotating relatively forward or reverse within a set angle range, and the sprocket shaft is rigidly connected with the sliding bracket, so that the main sprocket can play a role of supporting the chain to perform radial diameter expansion or radial diameter reduction, and play a role of tooth chain combination transmission power, meanwhile, the main chain wheel is provided with a tension spring hook hole on the other radial side of the center line of the chain teeth, the tension spring elastically positions the main chain wheel and the bracket, and the main chain wheel and the rotating centrifugal force of the chain wheel act together when not meshed with the chain, so that the center of gravity of the whole main chain wheel is positioned on the center line of the teeth and leans against the tooth side of the chain, and the teeth are middle teeth or middle side teeth when the main chain wheel is meshed with the chain.
4. The chain driven continuously variable transmission as claimed in claim 1, wherein said secondary sliding bracket is substantially the same as said main sliding bracket except that the secondary sliding bracket is free of a stopper and the secondary sprocket is free of a rotation stopper unlike the main sprocket.
5. The chain-driven continuously variable transmission as claimed in claim 1, wherein the speed-adjusting cone and the control system are formed by a cone-shaped disc having a taper angle of 45 degrees with respect to the axis, a slide track is formed on the cone surface and a wire-drawing hole seat is formed at a corresponding position, the slide track and the hole seat are respectively corresponding to the ball grooves of the base plate of the slide base, a bearing is provided on the speed-adjusting cone and is connected to a displacement support for controlling displacement through the bearing, a main shaft of the displacement support is a hollow shaft to conveniently provide the intermediate shaft to be connected to the corresponding base plate of the slide base, a displacement control device is a device for controlling the displacement of the cone through external mechanical force, the device can be driven by a hydraulic cylinder, a hydraulic oil pump, a motor and the like and has a self-locking function, and the function is that when the speed-adjusting cone moves axially, the slide track of the cone is pressed against the, thereby controlling the radial positions of the main sliding bracket and the auxiliary sliding bracket on the base plate of the sliding seat, adjusting the rotating diameter of the chain wheel rotating group and achieving the purpose of speed regulation.
6. The chain driven continuously variable transmission as claimed in claim 1, wherein the chain and main shaft drive system has an input shaft connected to the power input base plate, an intermediate drive shaft for connecting two or more pairs of intermediate drive base plates, an output shaft connected to the power output base plate, each pair of chains interlocked with the chain wheel groups on each pair of base plates, a guide sprocket fixed to the frame at a tight side of the chain for changing the direction of the chains to improve the meshing effect of the teeth, and a tension sprocket at a slack side of the chains for ensuring the direction of meshing with the chains and for elastically engaging the frame to ensure that the chain length can be adapted to the system requirements in all ranges of speed change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020448992.5U CN212251005U (en) | 2020-03-20 | 2020-03-20 | Chain transmission stepless speed change device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020448992.5U CN212251005U (en) | 2020-03-20 | 2020-03-20 | Chain transmission stepless speed change device |
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| Publication Number | Publication Date |
|---|---|
| CN212251005U true CN212251005U (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020448992.5U Expired - Fee Related CN212251005U (en) | 2020-03-20 | 2020-03-20 | Chain transmission stepless speed change device |
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| CN (1) | CN212251005U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114586508A (en) * | 2022-02-10 | 2022-06-07 | 河源市陈氏华兴农业发展有限公司 | Seeding speed adjusting mechanism and seeder |
-
2020
- 2020-03-20 CN CN202020448992.5U patent/CN212251005U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114586508A (en) * | 2022-02-10 | 2022-06-07 | 河源市陈氏华兴农业发展有限公司 | Seeding speed adjusting mechanism and seeder |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20201229 |