CN115303998B

CN115303998B - Lifting table

Info

Publication number: CN115303998B
Application number: CN202211246999.9A
Authority: CN
Inventors: 张玉灿
Original assignee: Nantong Tongzhou Yida Port Machinery Co ltd
Current assignee: Nantong Tongzhou Yida Port Machinery Co ltd
Priority date: 2022-10-12
Filing date: 2022-10-12
Publication date: 2023-06-20
Anticipated expiration: 2042-10-12
Also published as: CN115303998A

Abstract

The invention relates to the field of lifting platforms, in particular to a lifting platform. The device comprises a base shell, a supporting device and an adjusting device, wherein the supporting device comprises a mounting plate and a turnover assembly, the turnover assembly comprises a turnover tension spring, a rocker arm structure and a limiting structure, and the adjusting device comprises a main shaft, a sliding block and a locking structure. Under the action of gravity, the slider of top compresses reset spring, and the slider of below stretches reset spring, and two telescopic links no longer collineation, two locking dislocation are opened, and upset extension spring releases spacingly, drives the mounting panel to the horizontal upset, and when two telescopic links collineation again, locking ring and two locking position locking cooperation to the rotation of locking telescopic link, simultaneously, the length of length locking piece locking telescopic link makes the mounting panel by locking in the horizontality, realizes not measuring ground inclination, can adjust the angle by oneself so that the mounting panel is horizontal to guaranteed the ascending vertical of elevating gear lifting direction, convenient to use is swift.

Description

Lifting table

Technical Field

The invention relates to the field of lifting platforms, in particular to a lifting platform.

Background

The lifting platform is a multifunctional lifting loading and unloading mechanical device. The lifting platform has the characteristics of stable and accurate lifting, frequent starting, large carrying capacity and the like, and effectively solves various lifting operations to meet the lifting demands of different heights, so that the lifting platform is widely applicable to various industries. To ensure the safety of the lifting process when the lifting platform is on a plane with a gradient, the lifting platform is usually leveled. In the prior art, the name of the airport loading platform lifting leveling device is CN110092316B, and the lifting leveling device comprises a front translation leveling mechanism, a front folding arm, a rear folding arm and a rear translation leveling mechanism; one end of the front folding arm and one end of the rear folding arm are hinged with the chassis, and the other ends of the front folding arm and the rear folding arm are respectively hinged with the bottom surface of the loading platform; the front folding arm and the rear folding arm realize the lifting or front-back pitching of the loading platform through the synchronous or independent movement of the lifting oil cylinder; the front translation leveling mechanism and the rear translation leveling mechanism simultaneously have one horizontal degree of freedom and four vertical degrees of freedom, the horizontal degree of freedom of the front translation leveling mechanism and the rear translation leveling mechanism move to realize translation or rotation adjustment of the loading platform, the combined movement of the vertical degrees of freedom realizes fine adjustment or left-right inclination adjustment of the loading platform lifting, however, the platform needs to be lifted by manually leveling the lifting platform after measuring the inclination angle of the ground, and the lifting operation can be carried out very inconvenient.

Disclosure of Invention

The invention provides a lifting platform, which aims to solve the problem that the lifting platform needs to measure the gradient firstly and then artificially level the lifting platform on the ground with the gradient.

The invention relates to a lifting platform, which adopts the following technical scheme: a lifting platform comprises a base shell, a supporting device and an adjusting device. The base shell is arranged back and forth. The support device comprises a mounting plate and a turnover assembly. The mounting panel is equipped with two, parallel arrangement about two mounting panels, and the front end projection of the mounting panel of top is in the mounting panel middle part of below. The mounting plate is rotatably mounted on the base housing.

The turnover assembly comprises a turnover tension spring, a rocker arm structure and a limiting structure. The two turnover tension springs are respectively arranged at the front end and the rear end of the mounting plate. The two ends of the turnover tension spring at the front end are respectively connected with the front ends of the two mounting plates, the two ends of the turnover tension spring at the rear end are respectively connected with the rear ends of the two mounting plates, and the turnover tension spring is in a force storage state.

The limit structure is arranged between the base shell and the mounting plate and used for enabling the overturning tension spring to keep in a force storage state and enabling the overturning tension spring to release limit to shrink when the road surface has a gradient. The rocker arm structure is arranged at the front end and the rear end of the mounting plate and is configured to drive the mounting plate to turn to a horizontal state when the turnover tension spring contracts. The adjusting device is arranged between the two mounting plates and comprises a main shaft, a sliding block and a locking structure. The main shaft is arranged left and right. The two ends of the main shaft are fixed on the base shell.

The two sliding blocks are arranged, the two sliding blocks are distributed on the upper side and the lower side of the main shaft, and the projection of the two sliding blocks on the horizontal plane is distributed on the front side and the rear side of the main shaft. The slider is slidably mounted on the corresponding mounting plate in the front-rear direction. A telescopic rod is arranged between the sliding block and the main shaft. One end of the telescopic rod is hinged on the sliding block, the other end of the telescopic rod is hinged on the main shaft, and when the mounting plate is horizontal, the two telescopic rods are collinear. The hinge ends of the telescopic rods and the main shaft are preset with locking positions, and when the two telescopic rods are collinear, the two locking positions coincide. The telescopic rods are internally provided with reset springs which are used for resetting the sliding blocks when the mounting plates are turned to be in a horizontal state, and the telescopic amounts of the two telescopic rods when the mounting plates are in a horizontal state are identical and collinear.

The locking structure includes an angle locking member and a length locking member. The angle locking member includes a locking ring. The locking ring is sleeved on the main shaft, and the main shaft is provided with a rotation position and a clamping position of the locking ring, and the locking ring is rotatably and slidably arranged on the main shaft along the main shaft when the locking ring is in the rotation position, and moves to the clamping position when the two locking positions are overlapped to prevent the locking ring from rotating and is in locking fit with the two locking positions to lock the rotation between the telescopic rod and the main shaft. The length locking piece is used for locking the length of the telescopic rod when the locking ring is in locking fit with the two locking positions, so that the mounting plate is locked in a horizontal state.

Further, the rocker arm structure includes a front rocker arm group and a rear rocker arm group that are symmetrical about the center of the main shaft. The front rocker arm group comprises two front rocker arm pieces which are symmetrical left and right. The front rocker arm member includes a front hinge shaft and two front rocker arm levers. The front hinge shaft is fixedly connected to the front end of the base shell. The two front rocker arms are distributed on the front side and the rear side of the front hinge shaft. The front rocker arm rod is arranged up and down, the lower end of the front rocker arm rod is hinged on the front hinge shaft, and the upper end of the front rocker arm rod is hinged with the front end of the corresponding mounting plate. The rear rocker arm group comprises two rear rocker arm members which are symmetrical left and right. The rear rocker arm member includes a rear hinge shaft and two rear rocker arm levers. The rear hinge shaft is fixedly connected to the rear end of the base shell. The two rear rocker arms are distributed on the front side and the rear side of the rear hinge shaft. The rear rocker arm rod is arranged up and down, the upper end of the rear rocker arm rod is hinged on the rear hinge shaft, and the lower end of the rear rocker arm rod is hinged with the rear end of the corresponding mounting plate.

Further, the limiting structure is provided with two limiting grooves and limiting plates, and the limiting grooves and the limiting plates are symmetrically arranged on the left side and the right side of the mounting plate. The limiting groove is arranged on the mounting plate. The limiting plate is slidably arranged on the base shell along the main shaft, and the limiting plate is slidably inserted in the limiting groove.

Further, two angle locking pieces are arranged and are symmetrically arranged on two sides of the telescopic rod. The angle locking piece further comprises a first clamping ring, a second clamping ring and a driving piece. The first snap ring is arranged between the telescopic rod and the locking ring. The first clamping ring is rotatably arranged on the main shaft and fixedly arranged on the telescopic rod above, and the locking position of the telescopic rod above is arranged on the first clamping ring. The first snap ring is provided with a first notch. The first notch is a locking position above. The second snap ring is arranged between the locking ring and the first snap ring. The second snap ring is rotatably arranged on the main shaft and fixedly arranged on the telescopic rod below, and the locking position of the telescopic rod below is arranged on the second snap ring. The second snap ring is provided with a second notch. The second notch is a locking position below, and when the mounting plate is in a horizontal state, the second notch and the first notch are overlapped.

One side of the locking ring, which is close to the second clamping ring, is provided with a locking piece. The locking piece slidable mounting is in the second breach for when the locking ring is in the rotation position, the locking ring can rotate along with the second snap ring, and when the mounting panel level, the locking ring removes to the screens position, with the rotation of card locking ring, makes simultaneously the locking piece insert first breach after the second breach of sliding, realizes the pivoted locking between telescopic link and the main shaft. The driving piece is used for driving the locking ring to move from the rotating position to the locking position.

Further, the driving parts are symmetrically arranged in a left-right mode and comprise a driving rack, a driving gear, a worm, a sleeve and a push ring. The driving rack is arranged at the lower end of the limiting plate. The drive gear is rotatably mounted on the base housing and is positioned between the spindle and the drive rack. The driving rack and the driving gear are meshed for transmission. The worm is fixedly connected to the driving gear coaxially. The sleeve is sleeved on the main shaft, and the spiral groove is driven between the inner wall of the sleeve and the outer peripheral wall of the main shaft. The peripheral wall of the sleeve is meshed with the worm for transmission. The push ring is sleeved on the main shaft in a sliding way and is positioned between the locking ring and the sleeve. The push ring is abutted with the locking ring. A buffer spring is arranged between the push ring and the sleeve.

Further, the telescopic rod comprises a sub rod and a main rod. The main rod is sleeved on the outer side of the sub rod in a sliding way. The length locking member includes a locking rack, a locking gear, and a locking plate. The locking gear is rotatably mounted on the female lever. The locking rack is arranged along the length direction of the sub-rod, one end of the locking rack is fixedly connected to the sub-rod, and the other end of the locking rack is meshed with the locking gear. The locking plate is arranged along the length direction of the female rod. The locking plate is slidably mounted on the female lever along the locking gear axis. One end of the locking plate is connected with a locking spring. The locking spring is abutted with the push ring. The other end of the locking plate is provided with a locking hole. The lock hole is internally provided with a spline. The locking gear shaft is provided with a key slot at one end close to the locking plate, and the key slot is used for pushing the locking plate to enable the locking gear shaft to be inserted into the lock hole when the push ring pushes the locking ring to move to the clamping position, and the spline is matched with the key slot.

Further, a clamping groove is arranged at the clamping position. The periphery of the locking ring is provided with a clamping protrusion which is used for being clamped into the clamping groove to prevent the locking ring from rotating when the locking ring moves to the clamping position.

Further, the traveling wheels are arranged at the lower end of the base shell.

Further, a lifting device is detachably arranged on the upper mounting plate to realize lifting, and after the mounting plate is adjusted to be horizontal, the lifting device is moved to the upper side of the mounting plate, and the bottom plate is fixed on the upper mounting plate through bolts.

Further, two ends of the turnover tension spring are connected with connecting seats. The connecting seat is rotatably arranged on the mounting plate.

The beneficial effects of the invention are as follows: when the lifting platform equipment is placed on the ground with a gradient, under the action of gravity, the upper sliding block compresses the return spring, the lower sliding block stretches the return spring, the two telescopic rods are not collinear any more, so that the two locking positions are staggered, then the overturning tension spring is released from limiting, the mounting plate is overturned to a horizontal state under the cooperation of the rocker arm structure, when the mounting plate overturns to the horizontal state, the two telescopic rods are collinear again, the locking ring moves to the locking position to prevent the locking ring from rotating and is in locking cooperation with the two locking positions so as to lock the rotation between the telescopic rods and the main shaft, and meanwhile, the length locking piece locks the length of the telescopic rods, so that the mounting plate is locked in the horizontal state, the ground inclination angle can be automatically adjusted without measuring, the mounting plate is horizontal, the lifting direction of the lifting device is ensured to be vertical, and the lifting platform equipment is convenient and quick to use.

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 view of a lifting platform according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of an embodiment of the present invention;

FIG. 3 is a schematic view of the supporting device and the adjusting device according to the embodiment of the present invention;

FIG. 4 is a cross-sectional view of a support device and an adjustment device of an embodiment of the present invention;

FIG. 5 is an enlarged view of FIG. 4 at A;

FIG. 6 is a top view of an embodiment of the present invention;

FIG. 7 is an enlarged view at B in FIG. 6;

FIG. 8 is a cross-sectional view at B-B in FIG. 6;

FIG. 9 is an enlarged view of FIG. 8 at C;

fig. 10 is an enlarged view of D in fig. 8;

FIG. 11 is a schematic structural view of an adjusting device according to an embodiment of the present invention;

FIG. 12 is an enlarged view at E in FIG. 11;

FIG. 13 is an exploded view of an angle lock of an embodiment of the present invention;

FIG. 14 is a schematic view of the structure of a spindle according to an embodiment of the present invention;

FIG. 15 is a state diagram of the mounting plate and adjustment device with grade of an embodiment of the present invention;

in the figure: 100. a lifting device; 110. a walking wheel; 150. a base shell; 160. a limiting plate; 211. a mounting plate; 213. a front rocker arm; 214. a rear rocker arm; 221. a slide block; 222. a sub-rod; 223. a female rod; 224. a locking plate; 225. locking the gear rotating shaft; 231. a first snap ring; 232. a second snap ring; 233. a locking ring; 234. a locking piece; 241. a main shaft; 242. a sleeve; 243. a push ring; 244. a buffer spring; 245. a worm; 310. overturning the tension spring; 320. a connecting seat; 410. a clamping groove; 420. locking the rack.

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 lift table of the present invention is shown in fig. 1 to 15: a lifting table includes a base housing 150, a support means and an adjustment means. The base housing 150 is provided back and forth, and the upper portion is hollow and provided as a mounting groove. The support device is disposed in the mounting slot and includes a mounting plate 211 and a flip assembly. The two mounting plates 211 are arranged in parallel, and the front ends of the upper mounting plates 211 are projected to the middle of the lower mounting plates 211. The mounting plate 211 is rotatably mounted on the base housing 150.

The turnover assembly includes a turnover tension spring 310, a rocker arm structure and a limit structure. The two turnover tension springs 310 are arranged, and the two turnover tension springs 310 are respectively arranged at the front end and the rear end of the mounting plate 211. The two ends of the turnover tension spring 310 at the front end are respectively connected with the front ends of the two mounting plates 211, the two ends of the turnover tension spring 310 at the rear end are respectively connected with the rear ends of the two mounting plates 211, and the turnover tension spring 310 is in a force storage state. The limiting structure is provided between the base housing 150 and the mounting plate 211 for maintaining the turnover tension spring 310 in a power storage state, and releasing the turnover tension spring 310 from limitation to contract when the road surface has a slope.

The rocker arm structure is provided at both front and rear ends of the mounting plate 211, and is configured to drive the mounting plate 211 to turn to a horizontal state when the turn-over tension spring 310 is contracted. The adjusting means is provided between the two mounting plates 211, comprising a spindle 241, a slider 221 and a locking structure.

The main shaft 241 is disposed right and left. The main shaft 241 is fixed to the base housing 150 at both ends. The two sliding blocks 221 are arranged, the two sliding blocks 221 are distributed on the upper side and the lower side of the main shaft 241, and projections of the two sliding blocks 221 on a horizontal plane are distributed on the front side and the rear side of the main shaft 241. The slider 221 is slidably mounted on the corresponding mounting plate 211 in the front-rear direction. A telescopic rod is arranged between the sliding block 221 and the main shaft 241. One end of the telescopic rod is hinged on the sliding block 221, the other end is hinged on the main shaft 241, and when the mounting plate 211 is horizontal, the two telescopic rods are collinear. The hinge ends of the telescopic rod and the main shaft 241 are preset with locking positions, and when the two telescopic rods are collinear, the two locking positions coincide. A return spring is arranged in the telescopic rods and is used for resetting the sliding blocks 221 when the mounting plate 211 is turned to be in a horizontal state, and the telescopic amounts of the two telescopic rods when the mounting plate 211 is in a horizontal state are identical and are collinear.

The locking structure includes an angle locking member and a length locking member. The angle lock includes a lock ring 233. The locking ring 233 is sleeved on the main shaft 241, and the main shaft 241 is provided with a rotation position and a locking position of the locking ring 233, and the locking ring 233 is rotatably and slidably mounted on the main shaft 241 along the main shaft 241 when the locking ring 233 is in the rotation position, and when the locking positions on the hinged ends of the two telescopic rods and the main shaft 241 are overlapped, the locking ring 233 moves to the locking position to prevent the locking ring 233 from rotating and is in locking fit with the two locking positions to lock the rotation between the telescopic rods and the main shaft 241. The length locking member is used to lock the length of the telescopic rod when the locking ring 233 and the two locking positions are locked in cooperation, so that the mounting plate 211 is locked in a horizontal state. When the lifting platform device is placed on the ground with a gradient, under the action of gravity, the upper sliding block 221 compresses the return spring, the lower sliding block 221 stretches the return spring, the two telescopic rods are not collinear any more, so that the two locking positions are staggered, then the limit of the overturning tension spring 310 is released, the mounting plate 211 is overturned to a horizontal state under the cooperation of a rocker arm structure, when the mounting plate 211 overturns to the horizontal state, the two telescopic rods are collinear again, the locking ring 233 moves to a locking position to prevent the locking ring 233 from rotating and is in locking cooperation with the two locking positions to lock the rotation between the telescopic rods and the main shaft 241, and meanwhile, the length locking piece locks the length of the telescopic rods, so that the mounting plate 211 is locked in the horizontal state, and the angle can be automatically adjusted without measuring the inclination angle of the ground, so that the lifting direction of the lifting device 100 is vertical, and the lifting device is convenient and quick to use.

In this embodiment, the rocker arm structure includes a front rocker arm group and a rear rocker arm group that are centered symmetrically about the main shaft 241. The front rocker arm group comprises two front rocker arm pieces which are symmetrical left and right. The front rocker member comprises a front hinge shaft and two front rocker bars 213. The front hinge shaft is fixedly coupled to the front end of the base housing 150. Two front rocker arms 213 are distributed on the front and rear sides of the front hinge shaft. The front rocker arm 213 is disposed up and down, with its lower end hinged to the front hinge shaft and its upper end hinged to the front end of the corresponding mounting plate 211. The rear rocker arm group comprises two rear rocker arm members which are symmetrical left and right. The rear rocker member includes a rear hinge shaft and two rear rocker levers 214. The rear hinge shaft is fixedly coupled to the rear end of the base housing 150. Two rear rocker levers 214 are distributed on the front and rear sides of the rear hinge shaft. The rear rocker arm 214 is disposed up and down, with its upper end hinged to the rear hinge shaft and its lower end hinged to the rear end of the corresponding mounting plate 211. The tilt tension spring 310, when contracted, drives the two mounting plates 211 toward each other in the front-rear direction, and brings the two front rocker levers 213 toward each other, and the two rear rocker levers 214 toward each other. The front ends of the mounting plates 211 are lifted upward during the approaching of the two front rocker arms 213 to each other and the rear ends of the mounting plates 211 are lowered downward during the approaching of the two rear rocker arms 214 to each other.

In this embodiment, two limiting structures are symmetrically disposed on the left and right sides of the mounting plate 211, including a limiting groove and a limiting plate 160. The limit groove is provided on the mounting plate 211. The limiting plate 160 is slidably mounted on the base housing 150 along the main shaft 241, and the limiting plate 160 is slidably inserted into the limiting groove. In use, the limiting plate 160 is pulled out of the limiting groove to enable the mounting plate 211 to be released from the limit, so that the rotation capacity of the mounting plate 211 on the base shell 150 is restored.

In this embodiment, two angle locking members are provided, and the two angle locking members are symmetrically disposed on two sides of the telescopic rod. The angle locking member further includes a first snap ring 231, a second snap ring 232, and a driving member. The first snap ring 231 is provided between the telescopic rod and the locking ring 233. The first snap ring 231 is rotatably mounted on the main shaft 241 and fixedly mounted on the telescopic rod located above, and the locking position of the telescopic rod located above is set on the first snap ring 231. The first snap ring 231 is provided with a first notch. The first notch is a locking position located above. The second snap ring 232 is disposed between the lock ring 233 and the first snap ring 231. The second snap ring 232 is rotatably mounted on the main shaft 241 and fixedly mounted on the lower telescopic rod, and the locking position of the lower telescopic rod is set on the second snap ring 232. The second snap ring 232 is provided with a second notch. The second notch is a locking position below, and when the mounting plate 211 is in a horizontal state, the second notch and the first notch are coincident.

The locking ring 233 is provided with a locking piece 234 on a side close to the second snap ring 232. The locking piece 234 is slidably mounted in the second notch, and is configured to, when the locking ring 233 is in the rotation position, enable the locking ring 233 to rotate along with the second snap ring 232, and when the mounting plate 211 is horizontal, enable the locking ring 233 to move to the locking position to lock the locking ring 233 for rotation, and enable the locking piece 234 to slide through the second notch and then insert into the first notch, so as to achieve locking of rotation between the telescopic rod and the main shaft 241.

The driving member is used for driving the locking ring 233 to move from the rotating position to the locking position. The driving member pushes the locking ring 233 and moves the locking piece 234 to the locking position, and the locking protrusion is locked into the locking groove 410 to prevent the locking ring 233 from rotating. Simultaneously, the locking piece 234 is clamped into the first notch, so that the rotation between the telescopic rod and the main shaft 241 is locked.

In this embodiment, two driving members are symmetrically arranged on the left and right, including a driving rack, a driving gear, a worm 245, a sleeve 242 and a push ring 243. The driving rack is disposed at the lower end of the limiting plate 160. The drive gear is rotatably mounted on the base housing 150 between the main shaft 241 and the drive rack. The driving rack and the driving gear are meshed for transmission. The worm 245 is fixedly connected coaxially to the drive gear. The sleeve 242 is sleeved on the main shaft 241, and a spiral groove is driven between the inner wall of the sleeve 242 and the outer peripheral wall of the main shaft 241. The peripheral wall of the sleeve 242 engages the worm 245. The push ring 243 is slidably sleeved on the main shaft 241 and is located between the locking ring 233 and the sleeve 242. The push ring 243 abuts against the lock ring 233. A buffer spring 244 is arranged between the push ring 243 and the sleeve 242, and the buffer spring 244 is used for accumulating the force of the buffer sleeve 242 when the buffer sleeve 242 pushes the push ring 243 before the first notch is overlapped with the second notch, so that the push ring 243 pushes the locking ring 233 to enable the locking piece 234 to be pressed against the first clamping ring 231, and when the first notch is overlapped with the second notch, the first time releases the force to push the locking piece 234 into the first notch, thereby locking the rotation angle of the telescopic rod.

In this embodiment, the telescoping pole includes a child pole 222 and a parent pole 223. The main bar 223 is slidably sleeved outside the sub bar 222.

The length lock includes a locking rack 420, a locking gear, and a locking plate 224. The locking gear is rotatably mounted on the female bar 223. The locking rack 420 is disposed along the length direction of the sub-lever 222, with one end fixedly coupled to the sub-lever 222 and the other end engaged with the locking gear. The locking plate 224 is provided along the length direction of the female bar 223. The locking plate 224 is slidably mounted on the female bar 223 along the locking gear axis. A locking spring is connected to one end of the locking plate 224. The locking spring abuts the push ring 243. The other end of the locking plate 224 is provided with a locking hole. The lock hole is internally provided with a spline. The locking gear shaft 225 is provided with a key groove at one end near the locking plate 224, for pushing the locking plate 224 to insert the locking gear shaft 225 into the lock hole while pushing the locking ring 233 to move to the locking position by the push ring 243, and the spline is engaged with the key groove key to lock the length of the telescopic rod.

In the present embodiment, a locking groove 410 is provided at the locking position. The locking ring 233 has a locking protrusion at its outer periphery for locking into the locking groove 410 to prevent the locking ring 233 from rotating when the locking ring 233 moves to the locking position. When the mounting plate 211 is horizontal, the two telescopic rods are collinear, and the locking piece 234 enters the first notch, and simultaneously, the locking ring 233 slides into the clamping groove 410. The catch 410 mates with the catch stop.

In this embodiment, the traveling wheel 110 is installed at the lower end of the base housing 150 for convenient movement.

In this embodiment, the lifting device 100 is detachably mounted on the upper mounting plate 211 to achieve lifting, and the lifting device 100 includes a base plate, a mast, a cage and a motor. The bottom plate is detachably mounted on the upper mounting plate 211; the mast is fixedly mounted on the base plate, the cage is mounted on the mast so as to be movable up and down, and the motor is mounted on the upper mounting plate 211 for driving the cage up and down.

In this embodiment, the two ends of the turnover tension spring 310 are connected with the connection seats 320. The connection holder 320 is rotatably installed on the installation plate 211 for allowing the reverse tension spring to rotate adaptively as the installation plate 211 rotates.

In combination with the above embodiment, the use principle and working process of the present invention are as follows: when the telescopic device is used on the ground with a gradient, in the first step, the front end of the base shell 150 is placed towards the lower direction of the gradient, under the action of gravity, the upper sliding block 221 compresses the reset spring downwards, the upper telescopic rod contracts and rotates around the main shaft 241, the lower sliding block 221 stretches the reset spring downwards, the lower telescopic rod stretches and rotates around the main shaft 241, and the two telescopic rods are not collinear any more, so that the first notch and the second notch are staggered.

In the second step, the limiting plate 160 is pulled out of the limiting groove. On the one hand, the flipping tension spring 310 is released from the limit to contract. That is, the two mounting plates 211 are driven to approach each other in the front-rear direction by the contraction of the flip tension spring 310, and the two front rocker levers 213 are driven to approach each other, and the two rear rocker levers 214 are driven to approach each other. The front ends of the mounting plates 211 are lifted upward during the approaching of the two front rocker arms 213 to each other and the rear ends of the mounting plates 211 are lowered downward during the approaching of the two rear rocker arms 214 to each other. That is, the mounting plate 211 is rotated in the horizontal direction by the cooperation of the flip tension spring 310 and the swing arm structure. On the other hand, when the limiting plate 160 drives the driving rack to pull out of the limiting groove, the driving rack drives the driving gear to rotate, the driving gear drives the worm 245 to rotate, and the worm 245 drives the sleeve 242 to rotate and simultaneously pushes the push ring 243 to move towards the locking ring 233 through the buffer spring 244. During this process, the buffer spring 244 performs power accumulation. Because the first notch and the second notch at this time have been staggered, the locking piece 234 abuts against the first snap ring 231, so that the locking ring 233 is in a rotating position and cannot move continuously, and because the locking piece 234 is slidably mounted in the second notch, the locking ring 233 rotates synchronously through the locking piece 234 and the second snap ring 232.

Third, when the mounting plate 211 rotates to the horizontal position, the return springs drive the sliding block 221 to slide to the initial position and finally balance, that is, the two return springs have the same power accumulation state, so that the extension amounts of the upper and lower telescopic rods are the same. The two telescoping rods are re-collinear such that the first notch and the second notch coincide again. The buffer spring 244 releases the force, on the one hand, the locking ring 233 is pushed to move to the locking position with the locking piece 234, and the locking protrusion is locked into the locking groove 410 to prevent the locking ring 233 from rotating. Simultaneously, the locking piece 234 is clamped into the first notch, so that the rotation between the telescopic rod and the main shaft 241 is locked. On the other hand, the locking plate 224 is pushed so that the spline and the key groove are matched to prevent the locking gear from rotating, and the locking gear prevents the relative sliding of the sub rod 222 and the main rod 223 through the locking rack 420, so that the length of the telescopic rod is locked, and the mounting plate 211 is locked in a horizontal state. Therefore, when the road surface is on a gradient, the angle of the mounting plate 211 can be automatically adjusted to be in a horizontal state and automatically locked only by extracting the limiting plate 160 without measuring the gradient of the gradient road surface. When the mounting plate 211 is adjusted to be horizontal, the lifting device 100 is moved above the mounting plate 211, and the bottom plate is fixed to the mounting plate 211 above by bolts. Thereby ensuring the vertical direction of the lifting device 100 in the lifting direction and convenient and quick use.

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

1. A elevating platform, its characterized in that: comprises a base shell, a supporting device and an adjusting device;

the base shell is arranged front and back;

the supporting device comprises a mounting plate and a turnover assembly;

the two mounting plates are arranged in parallel up and down, and the front end of the upper mounting plate is projected to the middle of the lower mounting plate; the mounting plate is rotatably mounted on the base shell;

the overturning assembly comprises an overturning tension spring, a rocker arm structure and a limiting structure; the two turnover tension springs are respectively arranged at the front end and the rear end of the mounting plate; the two ends of the turnover tension spring at the front end are respectively connected with the front ends of the two mounting plates, the two ends of the turnover tension spring at the rear end are respectively connected with the rear ends of the two mounting plates, and the turnover tension spring is in a force storage state;

the limiting structure is arranged between the base shell and the mounting plate and is used for enabling the overturning tension spring to keep a power storage state and enabling the overturning tension spring to release limiting for shrinkage when the road surface has a gradient;

the rocker arm structures are arranged at the front end and the rear end of the mounting plate and are configured to drive the mounting plate to turn to a horizontal state when the turnover tension spring contracts;

the adjusting device is arranged between the two mounting plates and comprises a main shaft, a sliding block and a locking structure;

the main shaft is arranged left and right; the two ends of the main shaft are fixed on the base shell;

the two sliding blocks are arranged on the upper side and the lower side of the main shaft, and the projections of the two sliding blocks on the horizontal plane are arranged on the front side and the rear side of the main shaft; the sliding blocks are slidably arranged on the corresponding mounting plates along the front-back direction; a telescopic rod is arranged between the sliding block and the main shaft; one end of the telescopic rod is hinged on the sliding block, the other end of the telescopic rod is hinged on the main shaft, and when the mounting plate is horizontal, the two telescopic rods are collinear; the hinge ends of the telescopic rods and the main shaft are preset with locking positions, and when the two telescopic rods are collinear, the two locking positions are coincident; the telescopic rods are internally provided with reset springs, and the reset springs are used for resetting the sliding blocks when the mounting plates are turned to a horizontal state, and the telescopic amounts of the two telescopic rods are identical and collinear when the mounting plates are horizontal;

the locking structure comprises an angle locking piece and a length locking piece; the angle locking piece comprises a locking ring; the locking ring is sleeved on the main shaft, and the main shaft is provided with a rotating position and a clamping position of the locking ring, and is used for being rotatably and slidably arranged on the main shaft along the main shaft when the locking ring is in the rotating position, and moving to the clamping position to prevent the locking ring from rotating when the two locking positions are overlapped and being matched with the two locking positions in a locking way so as to lock the rotation between the telescopic rod and the main shaft; the length locking piece is used for locking the length of the telescopic rod when the locking ring is in locking fit with the two locking positions, so that the mounting plate is locked in a horizontal state,

the rocker arm structure comprises a front rocker arm group and a rear rocker arm group which are symmetrical about the center of the main shaft;

the front rocker arm group comprises two front rocker arm pieces which are bilaterally symmetrical; the front rocker arm piece comprises a front hinge shaft and two front rocker arm levers; the front hinge shaft is fixedly connected to the front end of the base shell; the two front rocker arms are distributed on the front side and the rear side of the front hinge shaft; the front rocker arm rod is arranged up and down, the lower end of the front rocker arm rod is hinged to the front hinge shaft, and the upper end of the front rocker arm rod is hinged to the front end of the corresponding mounting plate;

the rear rocker arm group comprises two rear rocker arm pieces which are bilaterally symmetrical; the rear rocker arm piece comprises a rear hinge shaft and two rear rocker arm levers; the rear hinge shaft is fixedly connected to the rear end of the base shell; the two rear rocker arms are distributed on the front side and the rear side of the rear hinge shaft; the upper end of the rear rocker arm rod is hinged to the rear hinge shaft, the lower end of the rear rocker arm rod is hinged to the rear end of the corresponding mounting plate, two limiting structures are arranged, and the two limiting structures are symmetrically arranged on the left side and the right side of the mounting plate and comprise limiting grooves and limiting plates; the limiting groove is arranged on the mounting plate; the limiting plate is slidably arranged on the base shell along the main shaft, the limiting plate is slidably inserted in the limiting groove, two angle locking pieces are arranged, and the two angle locking pieces are symmetrically arranged on two sides of the telescopic rod; the angle locking piece further comprises a first clamping ring, a second clamping ring and a driving piece;

the first clamping ring is arranged between the telescopic rod and the locking ring; the first clamping ring is rotatably arranged on the main shaft and fixedly arranged on the telescopic rod above, and the locking position of the telescopic rod above is arranged on the first clamping ring; the first clamping ring is provided with a first notch; the first notch is a locking position above;

the second clamping ring is arranged between the locking ring and the first clamping ring; the second clamping ring is rotatably arranged on the main shaft and fixedly arranged on the telescopic rod below, and the locking position of the telescopic rod below is arranged on the second clamping ring; the second clamping ring is provided with a second notch; the second notch is a locking position below, and when the mounting plate is in a horizontal state, the second notch is overlapped with the first notch;

a locking block is arranged on one side of the locking ring, which is close to the second clamping ring; the locking block is slidably arranged in the second notch and used for rotating along with the second clamping ring when the locking ring is in a rotating position, and moving to a clamping position when the mounting plate is horizontal so as to clamp the locking ring to rotate, and meanwhile, the locking block is inserted into the first notch after sliding through the second notch, so that the rotation locking between the telescopic rod and the main shaft is realized;

the driving piece is used for driving the locking ring to move from the rotation position to the locking position, and two driving pieces are symmetrically arranged left and right and comprise a driving rack, a driving gear, a worm, a sleeve and a push ring;

the driving rack is arranged at the lower end of the limiting plate; the driving gear is rotatably arranged on the base shell and is positioned between the main shaft and the driving rack; the driving rack and the driving gear are meshed for transmission; the worm is coaxially and fixedly connected to the driving gear; the sleeve is sleeved on the main shaft, and spiral grooves are formed between the inner wall of the sleeve and the outer peripheral wall of the main shaft for transmission; the peripheral wall of the sleeve is meshed with the worm for transmission;

the push ring is sleeved on the main shaft in a sliding way and is positioned between the locking ring and the sleeve; the push ring is abutted with the locking ring; a buffer spring is arranged between the push ring and the sleeve, and the telescopic rod comprises a sub rod and a main rod; the main rod is sleeved on the outer side of the sub rod in a sliding way;

the length locking piece comprises a locking rack, a locking gear and a locking plate; the locking gear is rotatably arranged on the female rod; the locking rack is arranged along the length direction of the sub-rod, one end of the locking rack is fixedly connected to the sub-rod, and the other end of the locking rack is meshed with the locking gear;

the locking plate is arranged along the length direction of the female rod; the locking plate is slidably arranged on the female rod along the axis of the locking gear; one end of the locking plate is connected with a locking spring; the locking spring is abutted with the push ring; the other end of the locking plate is provided with a locking hole; a spline is arranged in the lock hole; the locking gear rotating shaft is provided with a key groove at one end close to the locking plate, and is used for pushing the locking plate to enable the locking gear rotating shaft to be inserted into the lock hole when the pushing ring pushes the locking ring to move to a clamping position, and the spline is matched with the key groove key, and the clamping position is provided with a clamping groove; the periphery of the locking ring is provided with a clamping protrusion, when the locking ring moves to a clamping position, the clamping protrusion is clamped into the clamping groove to prevent the locking ring from rotating, when the lifting platform is placed on the ground with a gradient, under the action of gravity, the sliding block above the lifting platform compresses the return spring, the sliding block below the lifting platform stretches the return spring, the two telescopic rods are not collinear any more, so that the two locking positions are staggered, the overturning tension spring is released from limiting, the mounting plate is overturned to a horizontal state under the cooperation of a rocker arm structure, when the mounting plate overturns to the horizontal state, the two telescopic rods are collinear again, the locking ring moves to the clamping position to prevent the locking ring from rotating and is matched with the two locking positions in a locking manner, the length of the telescopic rods is locked by the length locking piece, the mounting plate is locked in the horizontal state, the ground inclination angle can be automatically adjusted, and the mounting plate can be horizontal.

2. A lifting platform as claimed in claim 1, wherein: the traveling wheels are arranged at the lower end of the base shell.

3. A lifting platform as claimed in claim 1, wherein: and a lifting device is detachably arranged on the upper mounting plate so as to realize lifting.

4. A lifting platform as claimed in claim 1, wherein: the two ends of the turnover tension spring are connected with connecting seats; the connecting seat is rotatably arranged on the mounting plate.