CN116425063A - Crane with overload locking device - Google Patents
Crane with overload locking device Download PDFInfo
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- CN116425063A CN116425063A CN202310693330.2A CN202310693330A CN116425063A CN 116425063 A CN116425063 A CN 116425063A CN 202310693330 A CN202310693330 A CN 202310693330A CN 116425063 A CN116425063 A CN 116425063A
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- 238000006073 displacement reaction Methods 0.000 claims description 7
- 230000002596 correlated effect Effects 0.000 claims description 6
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- 230000005012 migration Effects 0.000 claims description 2
- 238000013508 migration Methods 0.000 claims description 2
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- 238000009434 installation Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 6
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- 230000008569 process Effects 0.000 description 4
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- 238000004804 winding Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/88—Safety gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention relates to the technical field of lifting, in particular to a crane with an overload locking device, which comprises a tower body, a rotary arm, a hoisting mechanism and a triggering device, wherein the hoisting mechanism and the triggering device are respectively arranged on two side arms of the rotary arm; the triggering device comprises a load moment module and a counterweight moment module, wherein the counterweight moment module is used for converting the gravity of the counterweight block and outputting the counterweight block in a rotating mode; the load moment module integrates the gravity of the weight and the distance between the weight and the tower body, outputs the weight in a rotating mode, compares the weight with the rotating amplitude output by the weight moment module, judges whether the moment of the weight is larger than the weight moment exceeding the weight of the weight block, and if the moment of the weight exceeds the weight moment of the weight block, the hoisting mechanism is locked and stopped in time to avoid damaging the device. The weight of the weight and the distance between the weight and the tower body are comprehensively considered, and whether the overload is caused or not is judged more accurately by taking the weight and the distance between the weight and the tower body as the result.
Description
Technical Field
The invention relates to the technical field of lifting, in particular to a crane with an overload locking device.
Background
The tower crane is a common hoisting machine and is mainly used for transporting construction equipment and materials in the vertical direction and the horizontal direction, and one side of the rotary arm is used for hoisting a heavy object when the rotary arm rotates around the tower body, and the other side of the rotary arm needs to be weighted to prevent the inclined damage caused by overlarge stress on one side of the rotary arm. When the gravity of the lifted weight is large or the distance from the tower body is long, the moment of the lifted weight relative to the tower body is large, and the stability of the whole device can be influenced, so that an overload locking device is required to be additionally arranged on the crane, and the crane is locked when the moment of the lifted weight is larger than a limit value, and the crane stops in time to avoid causing larger loss. The existing lifting equipment generally judges whether the lifting equipment is overloaded according to the weight of a heavy object, and the judging mode is single, so that the lifting range of the whole device is affected.
Disclosure of Invention
When the distance between the heavy object and the tower body is large, even if the weight of the heavy object does not exceed the rated weight, overload can be caused, so that whether the heavy object is overloaded or not is judged, the weight of the heavy object and the distance between the heavy object and the tower body are comprehensively considered, the moment of the heavy object is comprehensively obtained, and whether the overload is more accurate is judged according to the result.
The invention provides a crane with an overload locking device, which solves the problem that the existing overload locking device is used for judging single overload condition of a heavy object.
The invention relates to a crane with an overload locking device, which adopts the following technical scheme:
the crane with the overload locking device comprises a tower body, a rotary arm, a hoisting mechanism, a triggering device, a hoisting mechanism and a locking device, wherein the middle section of the rotary arm is arranged on the tower body, the hoisting mechanism is used for hoisting heavy objects, and the hoisting mechanism and the triggering device are respectively arranged on two side arms of the rotary arm; the triggering device comprises a load moment module and a counterweight moment module, the load moment module comprises a moment arm unit, a gravity unit and a feedback unit, the moment arm unit is used for acquiring the distance between the hoisting mechanism and the tower body in the horizontal direction, the gravity unit is used for acquiring the gravity of a weight hoisted by the hoisting mechanism, and the feedback unit integrates the distance acquired by the moment arm unit with the gravity acquired by the gravity unit and outputs the integrated distance and the gravity in a rotating mode; a balancing weight is further arranged on one side of the rotary arm, which is close to the triggering device, and the balancing weight moment module is used for converting the gravity of the balancing weight and outputting the balancing weight in a rotating mode; when the rotation amplitude output by the feedback unit is increased to be equal to the rotation amplitude output by the counterweight moment module, triggering the hoisting mechanism to stop hoisting.
Further, the triggering device comprises a fixing frame and a central sleeve arranged on the fixing frame, and the central sleeve is arranged along the extension direction of the rotary arm; the feedback unit comprises an output rotary table, a transmission rotary table and a connecting rod, wherein the output rotary table is rotatably arranged on the central sleeve and is connected with the central sleeve through a torsion spring; the transmission turntable is rotatably and axially movably arranged on the fixed frame along the central sleeve and is positioned on one side of the output turntable, which is close to the tower body; the side surface of the transmission turntable, which is close to the output turntable, is provided with a conical surface surrounding the central sleeve, one end of the conical surface, which is close to the output turntable, is a small end, and the end, which is far away from the output turntable, is a large end; one end of the connecting rod is arranged on the output turntable in a sliding way along the radial direction of the output turntable, and the other end of the connecting rod is arranged on the transmission turntable in a sliding way along the inclined direction of the conical surface, so that the transmission turntable can move towards the direction close to the output turntable and can drive the output turntable to rotate through the connecting rod; the force arm unit enables the distance between the hoisting mechanism and the tower body in the horizontal direction to be in positive correlation with the distance of the transmission turntable moving towards the direction close to the output turntable; the gravity unit enables the gravity of the weight hoisted by the hoisting mechanism to be positively related to the rotation amplitude of the transmission turntable.
Further, the counterweight moment module is positioned on one side, far away from the tower body, of the load moment module and comprises an induction rod, a transmission rod group and an output assembly, the induction rod is axially and slidably arranged on the fixed frame along the central sleeve, and the displacement of the induction rod, which moves towards the direction far away from the tower body, is positively correlated with the weight of the counterweight; the output assembly is positioned on one side of the induction rod, which is close to the tower body, and comprises a transmission sleeve and a standard turntable, wherein the transmission sleeve is axially and slidably arranged on the central sleeve along the central sleeve, and the central sleeve limits the transmission sleeve to rotate around the central sleeve; the standard turntable is in spiral fit with the transmission sleeve, and the fixed frame limits the standard turntable to axially move along the central sleeve; when the induction rod moves, the transmission sleeve is driven to move through the transmission rod group, so that the standard turntable rotates.
Further, a trigger rod is arranged on the output rotary table, a contact switch is arranged on the standard rotary table, and the contact switch is electrically connected with the hoisting mechanism; when the rotation amplitude of the output turntable is increased to be equal to that of the standard turntable, the trigger rod is contacted with the contact switch, and the trigger hoisting mechanism is triggered to be closed.
Further, the transmission rod group comprises a horizontal rod, a first vertical rod, a second vertical rod and an inclined rod, wherein the horizontal rod is horizontally arranged, and two ends of the horizontal rod can be installed on the fixing frame in an up-and-down sliding manner; the first vertical rod and the second vertical rod are both arranged between the induction rod and the output assembly, are both vertically arranged and are slidably arranged on the fixing frame along the horizontal direction, and the first vertical rod is positioned on one side of the second vertical rod, which is close to the output assembly; the fixed frame is provided with a chute, the chute and the inclined rod are both positioned between the output assembly and the induction rod and are obliquely arranged along the direction from top to bottom and approaching the induction rod, and the lower end of the chute is positioned at one side of the lower end of the inclined rod, which is close to the tower body; the upper end of the inclined rod is hinged with the fixing frame, and the lower end of the inclined rod can slide up and down and is rotatably arranged on the induction rod; the first vertical rod and the horizontal rod are connected in series through a first pin shaft, the first pin shaft can vertically slide along the first vertical rod and can horizontally slide along the horizontal rod, and the first pin shaft is slidably arranged on the chute; the second vertical rod and the horizontal rod are connected in series through a second pin shaft, the second pin shaft can vertically slide along the second vertical rod and can horizontally slide along the horizontal rod, and the second pin shaft is slidably arranged on the inclined rod along the extending direction of the inclined rod; the second vertical rod is connected with the transmission sleeve; the inside adjusting part that is provided with of center sleeve, adjusting part connect output carousel and first montant, and under output carousel initial condition, restrict first montant horizontal migration, and then restrict the horizon bar through the cooperation of first round pin axle and chute and reciprocate to when the response pole is to keeping away from the body of a tower direction and remove, make the second montant drive transmission sleeve to keeping away from the body of a tower direction and remove.
Further, the adjusting assembly comprises a transmission column, a transmission ring and an adjusting column, wherein the transmission column is positioned in the central sleeve and is coaxial with the output turntable and fixedly connected with the output turntable, the transmission ring is in spiral fit with the transmission column, and the central sleeve limits the transmission ring to rotate along with the transmission column and allows the transmission ring to axially move along the transmission column; the adjusting column is axially and slidably arranged in the central sleeve along the central sleeve and is connected with the transmission ring through a pressure spring, and the adjusting column is connected with the first vertical rod; a locking component is arranged between the transmission turntable and the standard turntable, and the locking component prevents the standard turntable from rotating when the transmission turntable moves towards the direction close to the output turntable.
Further, the locking component comprises a sliding plate, a sliding rod and a friction plate, wherein the sliding plate is axially and slidably arranged on the fixed frame along the central sleeve and can synchronously move along with the transmission turntable; the sliding rod is axially arranged along the central sleeve, one end of the sliding rod is connected with the sliding plate, and the other end of the sliding rod is connected with the friction plate through a spring; the friction plate is arranged in contact with the standard turntable; when the sliding plate moves along with the transmission turntable towards the direction close to the output turntable, the sliding rod and the spring push the friction plate to be in friction contact with the standard turntable, so that the standard turntable is prevented from rotating when the output turntable rotates.
Further, the locking assembly further comprises a fixed plate and an elastic piece, and the sliding plate is positioned at one side of the transmission turntable far away from the output turntable; the fixed plate is fixedly arranged on the fixed frame and positioned between the sliding plate and the friction plate, the sliding rod slidably passes through the fixed plate, the fixed plate is connected with the sliding plate through the elastic piece, and when the transmission turntable moves towards the direction close to the output turntable, the elastic piece promotes the sliding plate to move towards the side close to the output turntable.
The beneficial effects of the invention are as follows: the crane with the overload locking device disclosed by the invention feeds the gravity of the weight and the distance between the weight and the tower body back to the feedback unit, outputs the weight and the distance between the weight and the tower body in a rotating mode, compares the weight and the distance with the rotating frame output by the counterweight moment module, judges whether the moment of the weight is larger than the counterweight moment exceeding the counterweight moment of the counterweight, and judges whether the moment of the weight is related to the gravity of the weight and the distance between the weight and the tower body. In the process that the hoisting mechanism lifts the weight into the air and then moves along the rotary arm, if the hoisting mechanism moves further in the direction away from the tower body, the distance between the weight and the tower body is increased, the torque of the obtained weight is also increased, and if the torque of the weight exceeds the weight torque of the balancing weight, the hoisting mechanism is locked and stopped in time and does not move continuously, so that the damage to the device is avoided. The weight of the weight and the distance between the weight and the tower body are comprehensively considered, and whether the overload is caused or not is judged more accurately by taking the weight and the distance between the weight and the tower body as the result.
Further, when the hoisting mechanism returns to the initial position each time, the rotation amplitude of the standard turntable can be adjusted according to the change of the stiffness coefficient of the torsion spring, measurement inaccuracy caused by fatigue and abrasion of the torsion spring is reduced, automatic calibration can be realized, and the operation is convenient.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a schematic overall construction of an embodiment of a crane with overload lock of the present invention;
FIG. 2 is a schematic view of the trigger device in an embodiment of a crane with overload lock of the present invention;
FIG. 3 is a schematic cross-sectional view of a trigger device in an embodiment of a crane with an overload lock of the present invention;
FIG. 4 is a schematic diagram of the feedback unit and a portion of the adjusting assembly of an embodiment of a crane with an overload lock according to the present invention;
FIG. 5 is a schematic view of the structure of the output assembly and a portion of the adjustment assembly of an embodiment of a crane with an overload lock of the present invention;
FIG. 6 is a schematic view of the structure of a drive rod assembly in an embodiment of a crane with an overload lock of the present invention;
in the figure: 100. a tower body; 110. a rotary arm; 130. a hoisting mechanism; 140. balancing weight; 200. a triggering device; 210. a fixing frame; 211. a chute; 212. a fixing plate; 220. a central sleeve; 230. an induction rod; 240. a drive rod group; 241. a horizontal bar; 242. a first vertical rod; 243. a second vertical rod; 244. a diagonal rod; 245. a first pin; 246. a second pin; 247. a first link; 248. a second link; 251. an output turntable; 252. a transmission turntable; 253. a connecting rod; 254. a torsion spring; 255. a trigger lever; 256. a conical surface; 257. a first chute; 258. a hydraulic telescopic cylinder; 259. a rotary oil hydraulic cylinder; 260. an output assembly; 261. a transmission sleeve; 262. a standard turntable; 263. a contact switch; 270. an adjustment assembly; 271. a drive column; 272. a drive ring; 273. an adjusting column; 274. a pressure spring; 280. a locking assembly; 281. a slip plate; 282. a slide bar; 283. a friction plate; 284. a spring; 285. an elastic member.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
An embodiment of the crane with overload locking apparatus of the present invention, as shown in fig. 1 to 6, includes a tower body 100, a swing arm 110 mounted to the tower body 100 at a middle section, a hoisting mechanism 130 for hoisting a weight, and a triggering device 200.
The hoisting mechanism 130 and the triggering device 200 are respectively installed on two side arms of the revolving arm 110, the hoisting mechanism 130 is used for hoisting a weight, the hoisting mechanism 130 can move along the extension direction of the revolving arm 110 so as to change the hoisting position of the weight, in an initial state, the hoisting mechanism 130 is positioned close to the tower body 100, and when the weight is hoisted, the hoisting mechanism 130 moves to the upper side of the weight along the revolving arm 110 in the direction away from the tower body 100. The hoisting mechanism 130 is a hoisting device commonly used in the art, and will not be described here.
The triggering device 200 comprises a load moment module and a counterweight moment module, wherein the load moment module comprises a moment arm unit, a gravity unit and a feedback unit, the moment arm unit is used for acquiring the distance between the hoisting mechanism 130 and the tower body 100 in the horizontal direction, the gravity unit is used for acquiring the gravity of a weight hoisted by the hoisting mechanism 130, and the feedback unit integrates the distance acquired by the moment arm unit with the gravity acquired by the gravity unit and outputs the integrated distance and the gravity in a rotating mode; the rotary arm 110 is further provided with a balancing weight 140 at one side close to the triggering device 200, and the balancing weight moment module is used for converting the gravity of the balancing weight 140 and outputting the gravity in a rotating mode; when the rotation amplitude output by the feedback unit is increased to be equal to the rotation amplitude output by the counterweight moment module, the hoisting mechanism 130 is triggered to stop hoisting.
The placement position of the balancing weight 140 on the rotary arm 110 is determined, and the rotation output by the balancing weight moment module is only related to the gravity of the balancing weight 140, and only the rotation of the balancing weight moment module is needed to be output according to the gravity of the balancing weight 140 during conversion. The weight of the weight and the distance between the weight and the tower body 100 are fed back to the feedback unit and then are output in a rotating mode, the weight is compared with the rotating amplitude output by the weight moment module, whether the moment of the weight is larger than the weight moment exceeding the weight 140 is judged, the moment of the weight is related to the weight of the weight and the distance between the weight and the tower body 100, the weight is hoisted to be separated from the ground by the hoisting mechanism 130, the weight born by the hoisting mechanism 130 is increased, the obtained moment of the weight is increased, if the moment of the weight exceeds the weight moment of the weight 140, the hoisting mechanism 130 is locked and stopped in time, the hoisting is not continued, and the damage to the device is avoided. In the process that the hoisting mechanism 130 lifts the weight into the air and then moves along the rotary arm 110, if the hoisting mechanism 130 moves further away from the tower body 100, the distance between the weight and the tower body 100 increases, the torque of the obtained weight also increases, and if the torque of the weight exceeds the weight torque of the balancing weight 140, the hoisting mechanism 130 is locked and stopped in time, and does not move continuously, so that the damage to the device is avoided.
In this embodiment, the triggering device 200 includes a fixing frame 210 and a central sleeve 220 fixedly installed to the fixing frame 210, the central sleeve 220 being disposed along the extension direction of the rotary arm 110; the feedback unit includes an output turntable 251, a transmission turntable 252, and a connection rod 253, and the output turntable 251 is rotatably installed to the center sleeve 220 and is connected with the center sleeve 220 through a torsion spring 254. The transmission turntable 252 is rotatably and axially movably mounted on the fixed frame 210 along the central sleeve 220 and is positioned on one side of the output turntable 251 close to the tower body 100; the side of drive turntable 252 adjacent output turntable 251 is provided with a tapered surface 256 about central sleeve 220, the end of tapered surface 256 adjacent output turntable 251 being the small end and the end remote from output turntable 251 being the large end. One end of the connecting rod 253 is arranged on the output turntable 251 in a sliding way along the radial direction of the output turntable 251, and the other end of the connecting rod 253 is arranged on the transmission turntable 252 in a sliding way along the inclined direction of the conical surface 256, so that the transmission turntable 252 can move towards the direction close to the output turntable 251 and can drive the output turntable 251 to rotate through the connecting rod 253; specifically, a first chute 257 is arranged on the conical surface 256 along the direction of the generatrix of the conical surface 256, a second chute is arranged on the surface of the output turntable 251, which is close to the transmission turntable 252, along the radial direction of the output turntable 251, and two ends of the connecting rod 253 are respectively and slidably arranged on the first chute 257 and the second chute; the connecting rods 253 can be multiple, are circumferentially arranged at intervals around the transmission turntable 252, and are arranged corresponding to the first sliding grooves 257 and the second sliding grooves.
The force arm unit makes the distance between the hoisting mechanism 130 and the tower body 100 in the horizontal direction positively correlated with the distance between the transmission turntable 252 and the direction close to the output turntable 251, namely, the more the hoisting mechanism 130 moves towards the direction far away from the tower body 100, the more the transmission turntable 252 moves towards the direction of the output turntable 251, so that the closer the connecting rod 253 is to the large end of the conical surface 256, the easier the output turntable 251 is driven by the transmission turntable 252 to overcome the torsion force of the torsion spring 254 and rotate; specifically, the displacement of the hoisting mechanism 130 moving away from the tower body 100 can be monitored by an infrared range finder, the movement of the transmission turntable 252 can be driven by a hydraulic telescopic cylinder 258, and the hydraulic telescopic cylinder 258 adapts the extending amount according to the displacement monitored by the infrared range finder, so that the moving amount of the transmission turntable 252 is matched with the moving amount of the hoisting mechanism 130. The gravity unit makes the gravity of the weight hoisted by the hoisting mechanism 130 and the rotation amplitude of the transmission turntable 252 positively correlated, that is, the larger the gravity of the weight hoisted by the hoisting mechanism 130 is, the larger the rotation amplitude of the transmission turntable 252 is, and the larger the transmission turntable 252 drives the output turntable 251 to rotate through the connecting rod 253. Specifically, a hydraulic cylinder is disposed between the hoisting mechanism 130 and the weight to be hoisted, the transmission turntable 252 is driven to rotate by an external rotary hydraulic cylinder 259, the hydraulic cylinder is communicated with the rotary hydraulic cylinder 259 through an oil pipe, the larger the weight of the weight to be hoisted is, the larger the oil quantity in the rotary hydraulic cylinder, which is extruded to flow into the rotary hydraulic cylinder 259, the larger the rotation amplitude output by the rotary hydraulic cylinder 259 is, and the rotation amplitude of the transmission turntable 252 is matched with the weight of the weight to be hoisted.
In this embodiment, the counterweight moment module is located at a side of the load moment module far away from the tower body 100, and includes an induction rod 230, a transmission rod group 240 and an output assembly 260, the induction rod 230 is axially slidably mounted on the fixing frame 210 along the central sleeve 220, and the displacement of the induction rod 230 moving in a direction far away from the tower body 100 is positively correlated with the weight of the counterweight 140; specifically, the balancing weights 140 are multiple, the balancing weights 140 are sequentially arranged along the axial direction of the central sleeve 220, the more the balancing weights 140 are, the greater the overall weight is, the sensing rod 230 comprises a sliding part and a sensing part which are fixedly connected, the sliding part is axially slidably mounted on the fixing frame 210 along the central sleeve 220, one end, far away from the sliding part, of the sensing part is attached to one side, far away from the tower body 100, of the balancing weights 140, and the more the balancing weights 140 are, the more the sensing part pushing the sensing rod 230 moves towards the direction far away from the tower body 100. The output assembly 260 is located on one side of the induction rod 230 near the tower body 100, and comprises a transmission sleeve 261 and a standard turntable 262, wherein the transmission sleeve 261 is axially and slidably installed on the central sleeve 220 along the central sleeve 220, and the central sleeve 220 limits the transmission sleeve 261 to rotate around the central sleeve 220; specifically, the transmission sleeve 261 is engaged with the center sleeve 220 by splines axially disposed along the center sleeve 220. The standard turntable 262 is in screw fit with the transmission sleeve 261, and the fixed frame 210 limits the axial movement of the standard turntable 262 along the central sleeve 220; specifically, the movement of the standard dial 262 along the axial direction of the center sleeve 220 may be limited by providing a stop on the mount 210. When the sensing rod 230 moves, the transmission sleeve 261 is driven to move through the transmission rod group 240, so that the standard turntable 262 rotates under the spiral fit with the transmission sleeve 261, and the more the displacement of the sensing rod 230 moves, the more the displacement of the sensing rod 230 drives the transmission sleeve 261 to move through the transmission rod group 240, and the larger the rotating amplitude of the standard turntable 262.
In this embodiment, the trigger rod 255 is mounted on the output turntable 251, the contact switch 263 is mounted on the standard turntable 262, and the contact switch 263 is electrically connected with the winding mechanism 130; when the rotation width of the output turntable 251 is increased to be equal to the rotation width of the standard turntable 262, the trigger lever 255 contacts the contact switch 263 to trigger the winding mechanism 130 to be turned off.
In this embodiment, the transmission rod set 240 includes a horizontal rod 241, a first vertical rod 242, a second vertical rod 243 and an inclined rod 244, where the horizontal rod 241 is horizontally disposed and two ends of the horizontal rod are slidably mounted on the fixing frame 210; the first vertical rod 242 and the second vertical rod 243 are both positioned between the sensing rod 230 and the output assembly 260, are both vertically arranged and are slidably mounted on the fixing frame 210 along the horizontal direction, and the first vertical rod 242 is positioned on one side of the second vertical rod 243 close to the output assembly 260; the fixed frame 210 is provided with a chute 211, the chute 211 and the inclined rod 244 are respectively positioned between the output assembly 260 and the sensing rod 230 and are obliquely arranged along the direction from top to bottom and approaching the sensing rod 230, and the lower end of the chute 211 is positioned at one side of the lower end of the inclined rod 244 approaching the tower body 100; the inclined rod 244 is hinged to the fixing frame 210 at an upper end thereof, and is rotatably installed at a sliding portion of the sensing rod 230 at a lower end thereof to be vertically slidable. The first vertical rod 242 and the horizontal rod 241 are connected in series through a first pin shaft 245, the first pin shaft 245 can vertically slide along the first vertical rod 242 and can horizontally slide along the horizontal rod 241, and the first pin shaft 245 passes through the first vertical rod 242 and the horizontal rod 241 and is slidably arranged on the chute 211. The second vertical rod 243 is connected with the horizontal rod 241 in series through a second pin 246, the second pin 246 can vertically slide along the second vertical rod 243 and can horizontally slide along the horizontal rod 241, and the second pin 246 passes through the second vertical rod 243 and the horizontal rod 241 and is slidably mounted on the diagonal rod 244 along the extending direction of the diagonal rod 244. The second vertical rod 243 is connected with the transmission sleeve 261; specifically, the second vertical rod 243 is provided with a first hinge seat, the end of the transmission sleeve 261 is provided with a first link 247, and the first link 247 is rotatably installed on the first hinge seat, so that the transmission sleeve 261 moves horizontally along with the second vertical rod 243 synchronously. The central sleeve 220 is internally provided with an adjusting component 270, the adjusting component 270 is connected with the output rotary table 251 and the first vertical rod 242, and the output rotary table 251 limits the first vertical rod 242 to horizontally move in an initial state, and further limits the horizontal rod 241 to vertically move through the cooperation of the first pin shaft 245 and the chute 211, so that when the induction rod 230 moves in a direction away from the tower body 100, the second vertical rod 243 drives the transmission sleeve 261 to move in a direction away from the tower body 100.
In this embodiment, the adjusting assembly 270 includes a driving post 271, a driving ring 272 and an adjusting post 273, the driving post 271 is located in the central sleeve 220 and is coaxial and fixedly connected with the output turntable 251, the driving ring 272 is in screw fit with the driving post 271, and the central sleeve 220 limits the driving ring 272 to rotate with the driving post 271 and allows the driving ring 272 to move axially along the driving post 271; the adjusting column 273 is axially and slidably arranged in the central sleeve 220 along the central sleeve 220 and is connected with the driving ring 272 through a pressure spring 274, and the adjusting column 273 is connected with the first vertical rod 242; specifically, the first vertical rod 242 is provided with a second hinge seat, the end of the adjusting column 273 is provided with a second connecting rod 248, and the second connecting rod 248 is rotatably installed on the second hinge seat, so that the first vertical rod 242 moves horizontally along with the adjusting column 273 synchronously. When the output rotary table 251 returns to the initial state and the stiffness coefficient of the torsion spring 254 is attenuated, the output rotary table 251 rotates a preset angle relative to the torsion spring 254 in a normal state, the output rotary table 251 drives the transmission column 271 to rotate, so that the transmission ring 272 pushes the adjustment column 273 to move away from the tower body 100 through the compression spring 274, the adjustment column 273 drives the first vertical rod 242 to move away from the tower body 100, the horizontal rod 241 is further moved downwards through the cooperation of the first pin shaft 245 and the chute 211, the second vertical rod 243 is guided by the inclined rod 244 to move away from the tower body 100, and the transmission sleeve 261 is driven to move away from the tower body 100, so that the standard rotary table 262 further rotates, the rotation width of the standard rotary table 262 is increased, the new stiffness coefficient of the torsion spring 254 is adapted, and the problem that feedback torque is inaccurate due to fatigue of the torsion spring 254 and the limit lifting is influenced is prevented. A locking component 280 is arranged between the transmission turntable 252 and the standard turntable 262, and the locking component 280 prevents the standard turntable 262 from rotating when the transmission turntable 252 moves towards the direction close to the output turntable 251, so that the rotation of the standard turntable 262 is avoided when the output turntable 251 rotates in the lifting process, and the output rotating amplitude of the counterweight moment module is prevented from being influenced.
In this embodiment, the locking assembly 280 includes a sliding plate 281, a sliding rod 282 and a friction plate 283, wherein the sliding plate 281 is axially slidably mounted on the fixing frame 210 along the central sleeve 220 and can move synchronously with the transmission turntable 252; the sliding rod 282 is axially arranged along the central sleeve 220, one end of the sliding rod is connected with the sliding plate 281, and the other end of the sliding rod is connected with the friction plate 283 through a spring 284; the friction plate 283 is disposed in contact with the standard turntable 262; when the sliding plate 281 moves along with the transmission turntable 252 in a direction approaching the output turntable 251, the sliding rod 282 and the spring 284 push the friction plate 283 to be in friction contact with the standard turntable 262, so that the standard turntable 262 is prevented from rotating when the output turntable 251 rotates.
In this embodiment, locking assembly 280 further includes a fixed plate 212 and an elastic element 285, and a sliding plate 281 is located on the side of drive turntable 252 away from output turntable 251; the fixed plate 212 is fixedly mounted on the fixed frame 210 and is located between the sliding plate 281 and the friction plate 283, the sliding rod 282 slidably passes through the fixed plate 212, the fixed plate 212 is connected with the sliding plate 281 through the elastic element 285, and when the transmission turntable 252 moves towards the direction approaching the output turntable 251, the elastic element 285 is a tension spring, so that the sliding plate 281 is urged to move towards the side approaching the output turntable 251. In some other embodiments, a circumferential groove may be provided on the outer circumference of drive turntable 252 such that slip plate 281 is positioned within the circumferential groove to move synchronously with drive turntable 252 without affecting the rotation of drive turntable 252, and without the use of resilient members 285 to facilitate the synchronous movement of slip plate 281 with drive turntable 252.
The hoist with overload locking apparatus of the present invention is located at a position of the swing arm 110 near the tower body 100, and the initial distance from the tower body 100 may be 0, before the hoist is used. At this time, since the transmission turntable 252 and the output turntable 251 are not driven by external force and do not rotate, the adjusting assembly 270 limits the first vertical rod 242 to move horizontally, and further limits the horizontal rod 241 to move up and down through the cooperation of the first pin shaft 245 and the chute 211. The balancing weights 140 are sequentially placed along the axial direction of the central sleeve 220, the sensing part of the sensing rod 230 is pushed by the balancing weights 140 to move towards the direction far away from the tower body 100 and drives the inclined rod 244 to rotate towards the direction far away from the tower body 100 around the upper end of the inclined rod, and the horizontal rod 241 is limited to move up and down, so that the second vertical rod 243 moves towards the direction far away from the tower body 100 and drives the transmission sleeve 261 to move through the second connecting rod 248, the standard turntable 262 rotates under the spiral fit with the transmission sleeve 261, and the rotating angle of the standard turntable 262 is positively correlated with the weight of the balancing weights 140.
When a heavy object needs to be lifted, the hoisting mechanism 130 is moved to the position above the heavy object in the direction away from the tower body 100, the hydraulic telescopic cylinder 258 drives the transmission turntable 252 to move towards the direction close to the output turntable 251, the moving distance of the transmission turntable 252 is matched with the moving distance of the hoisting mechanism 130, the sliding plate 281 moves synchronously with the transmission turntable 252, and the sliding rod 282 and the spring 284 push the friction plate 283 to push the standard turntable 262, so that the standard turntable 262 is prevented from further rotation. During the hoisting process of the hoisting mechanism 130, the weight extrudes the hydraulic oil in the hydraulic oil cylinder to flow into the rotary oil cylinder 259 under the action of gravity, so that the rotary oil cylinder 259 drives the transmission turntable 252 to rotate, and the larger the weight of the weight is, the larger the rotation amplitude output by the rotary oil cylinder 259 is. When the transmission turntable 252 moves towards the direction approaching to the output turntable 251, the connecting rod 253 moves towards the direction far away from the central sleeve 220, so that when the transmission turntable 252 rotates, the output turntable 251 is driven by the connecting rod 253 to overcome the torsion of the torsion spring 254 more easily; the movement and rotation degree of the transmission turntable 252 is fed back to the rotation amplitude of the output turntable 251 through the movement and transmission of the connecting rod 253, so that the comparison with the rotation amplitude of the standard turntable 262 is facilitated, and whether the weight is overloaded or not is judged. When the rotation width of the output turntable 251 is increased to be equal to the rotation width of the standard turntable 262, the trigger lever 255 contacts the contact switch 263 to trigger the winding mechanism 130 to be turned off.
The hoisting mechanism 130 returns to the initial position after hoisting, the friction plate 283 does not push against the standard turntable 262 any more, the torsion spring 254 recovers deformation to enable the output turntable 251 to rotate and reset, as the use times increase, if the torsion spring 254 is in fatigue wear and the stiffness coefficient is reduced, the output turntable 251 rotates relative to the normal reset position by a preset angle after reset, the output turntable 251 drives the transmission column 271 to rotate, further the transmission ring 272 pushes the adjustment column 273 to move away from the tower body 100 through the pressure spring 274, the adjustment column 273 drives the first vertical rod 242 to move away from the tower body 100, further the horizontal rod 241 moves downwards through the cooperation of the first pin shaft 245 and the chute 211, the second vertical rod 243 moves away from the tower body 100 under the guidance of the inclined rod 244, and the transmission sleeve 261 is driven to move away from the tower body 100, so that the standard turntable 262 further rotates, the rotating width of the standard turntable 262 is increased, the novel stiffness coefficient of the torsion spring 254 is adapted, and the problem that feedback moment inaccuracy caused by fatigue of the torsion spring 254 is prevented, and lifting limit is affected is avoided. And when the hoisting mechanism 130 returns to the initial position each time, the rotation width of the standard turntable 262 can be adjusted according to the change of the stiffness coefficient of the torsion spring 254, so that measurement inaccuracy caused by fatigue and abrasion of the torsion spring 254 is reduced, automatic calibration can be realized, and the operation is convenient.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (8)
1. The utility model provides a hoist with overload locking device, includes tower body, middle section installation in the gyration arm of tower body and the hoist mechanism who is used for hoisting heavy object, its characterized in that: the device also comprises a triggering device;
the hoisting mechanism and the triggering device are respectively arranged on two side arms of the rotary arm;
the triggering device comprises a load moment module and a counterweight moment module, the load moment module comprises a moment arm unit, a gravity unit and a feedback unit, the moment arm unit is used for acquiring the distance between the hoisting mechanism and the tower body in the horizontal direction, the gravity unit is used for acquiring the gravity of a weight hoisted by the hoisting mechanism, and the feedback unit integrates the distance acquired by the moment arm unit with the gravity acquired by the gravity unit and outputs the integrated distance and the gravity in a rotating mode; a balancing weight is further arranged on one side of the rotary arm, which is close to the triggering device, and the balancing weight moment module is used for converting the gravity of the balancing weight and outputting the balancing weight in a rotating mode; when the rotation amplitude output by the feedback unit is increased to be equal to the rotation amplitude output by the counterweight moment module, triggering the hoisting mechanism to stop hoisting.
2. Crane with overload locking device according to claim 1, characterized in that: the triggering device comprises a fixed frame and a central sleeve arranged on the fixed frame, and the central sleeve is arranged along the extension direction of the rotary arm; the feedback unit comprises an output rotary table, a transmission rotary table and a connecting rod, wherein the output rotary table is rotatably arranged on the central sleeve and is connected with the central sleeve through a torsion spring; the transmission turntable is rotatably and axially movably arranged on the fixed frame along the central sleeve and is positioned on one side of the output turntable, which is close to the tower body; the side surface of the transmission turntable, which is close to the output turntable, is provided with a conical surface surrounding the central sleeve, one end of the conical surface, which is close to the output turntable, is a small end, and the end, which is far away from the output turntable, is a large end; one end of the connecting rod is arranged on the output turntable in a sliding way along the radial direction of the output turntable, and the other end of the connecting rod is arranged on the transmission turntable in a sliding way along the inclined direction of the conical surface, so that the transmission turntable can move towards the direction close to the output turntable and can drive the output turntable to rotate through the connecting rod; the force arm unit enables the distance between the hoisting mechanism and the tower body in the horizontal direction to be in positive correlation with the distance of the transmission turntable moving towards the direction close to the output turntable; the gravity unit enables the gravity of the weight hoisted by the hoisting mechanism to be positively related to the rotation amplitude of the transmission turntable.
3. Crane with overload locking device according to claim 2, characterized in that: the counterweight moment module is positioned at one side of the load moment module far away from the tower body and comprises an induction rod, a transmission rod group and an output assembly, the induction rod is axially and slidably arranged on the fixed frame along the central sleeve, and the displacement of the induction rod moving towards the direction far away from the tower body is positively correlated with the weight of the counterweight; the output assembly is positioned on one side of the induction rod, which is close to the tower body, and comprises a transmission sleeve and a standard turntable, wherein the transmission sleeve is axially and slidably arranged on the central sleeve along the central sleeve, and the central sleeve limits the transmission sleeve to rotate around the central sleeve; the standard turntable is in spiral fit with the transmission sleeve, and the fixed frame limits the standard turntable to axially move along the central sleeve; when the induction rod moves, the transmission sleeve is driven to move through the transmission rod group, so that the standard turntable rotates.
4. A crane with overload locking apparatus as claimed in claim 3 wherein: the output turntable is provided with a trigger rod, the standard turntable is provided with a contact switch, and the contact switch is electrically connected with the hoisting mechanism; when the rotation amplitude of the output turntable is increased to be equal to that of the standard turntable, the trigger rod is contacted with the contact switch, and the trigger hoisting mechanism is triggered to be closed.
5. A crane with overload locking apparatus as claimed in claim 3 wherein: the transmission rod group comprises a horizontal rod, a first vertical rod, a second vertical rod and an inclined rod, wherein the horizontal rod is horizontally arranged, and two ends of the horizontal rod can be installed on the fixing frame in an up-and-down sliding manner; the first vertical rod and the second vertical rod are both arranged between the induction rod and the output assembly, are both vertically arranged and are slidably arranged on the fixing frame along the horizontal direction, and the first vertical rod is positioned on one side of the second vertical rod, which is close to the output assembly; the fixed frame is provided with a chute, the chute and the inclined rod are both positioned between the output assembly and the induction rod and are obliquely arranged along the direction from top to bottom and approaching the induction rod, and the lower end of the chute is positioned at one side of the lower end of the inclined rod, which is close to the tower body; the upper end of the inclined rod is hinged with the fixing frame, and the lower end of the inclined rod can slide up and down and is rotatably arranged on the induction rod; the first vertical rod and the horizontal rod are connected in series through a first pin shaft, the first pin shaft can vertically slide along the first vertical rod and can horizontally slide along the horizontal rod, and the first pin shaft is slidably arranged on the chute; the second vertical rod and the horizontal rod are connected in series through a second pin shaft, the second pin shaft can vertically slide along the second vertical rod and can horizontally slide along the horizontal rod, and the second pin shaft is slidably arranged on the inclined rod along the extending direction of the inclined rod; the second vertical rod is connected with the transmission sleeve; the inside adjusting part that is provided with of center sleeve, adjusting part connect output carousel and first montant, and under output carousel initial condition, restrict first montant horizontal migration, and then restrict the horizon bar through the cooperation of first round pin axle and chute and reciprocate to when the response pole is to keeping away from the body of a tower direction and remove, make the second montant drive transmission sleeve to keeping away from the body of a tower direction and remove.
6. The crane with overload locking apparatus of claim 5 wherein: the adjusting assembly comprises a transmission column, a transmission ring and an adjusting column, the transmission column is positioned in the central sleeve and is coaxial with the output turntable and fixedly connected with the output turntable, the transmission ring is in spiral fit with the transmission column, and the central sleeve limits the transmission ring to rotate along with the transmission column and allows the transmission ring to axially move along the transmission column; the adjusting column is axially and slidably arranged in the central sleeve along the central sleeve and is connected with the transmission ring through a pressure spring, and the adjusting column is connected with the first vertical rod; a locking component is arranged between the transmission turntable and the standard turntable, and the locking component prevents the standard turntable from rotating when the transmission turntable moves towards the direction close to the output turntable.
7. The crane with overload locking apparatus of claim 6 wherein: the locking component comprises a sliding plate, a sliding rod and a friction plate, wherein the sliding plate is axially and slidably arranged on the fixed frame along the central sleeve and can synchronously move along with the transmission turntable; the sliding rod is axially arranged along the central sleeve, one end of the sliding rod is connected with the sliding plate, and the other end of the sliding rod is connected with the friction plate through a spring; the friction plate is arranged in contact with the standard turntable; when the sliding plate moves along with the transmission turntable towards the direction close to the output turntable, the sliding rod and the spring push the friction plate to be in friction contact with the standard turntable, so that the standard turntable is prevented from rotating when the output turntable rotates.
8. The crane with overload locking apparatus of claim 7 wherein: the locking assembly further comprises a fixed plate and an elastic piece, and the sliding plate is positioned at one side of the transmission turntable far away from the output turntable; the fixed plate is fixedly arranged on the fixed frame and positioned between the sliding plate and the friction plate, the sliding rod slidably passes through the fixed plate, the fixed plate is connected with the sliding plate through the elastic piece, and when the transmission turntable moves towards the direction close to the output turntable, the elastic piece promotes the sliding plate to move towards the side close to the output turntable.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310693330.2A CN116425063A (en) | 2023-06-13 | 2023-06-13 | Crane with overload locking device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310693330.2A CN116425063A (en) | 2023-06-13 | 2023-06-13 | Crane with overload locking device |
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| CN116425063A true CN116425063A (en) | 2023-07-14 |
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| CN202310693330.2A Pending CN116425063A (en) | 2023-06-13 | 2023-06-13 | Crane with overload locking device |
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| CN116605774A (en) * | 2023-07-17 | 2023-08-18 | 山东兴源机械有限公司 | Overhead bridge type overhead crane |
| CN117383441A (en) * | 2023-12-07 | 2024-01-12 | 山西机电职业技术学院 | Overload self-protection crane |
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Application publication date: 20230714 |