CN115303998A

CN115303998A - Lifting platform

Info

Publication number: CN115303998A
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: 2022-11-08
Anticipated expiration: 2042-10-12
Also published as: CN115303998B

Abstract

The invention relates to the field of lifting platforms, in particular to a lifting platform. Including base shell, strutting arrangement and adjusting device, strutting arrangement includes mounting panel and upset subassembly, and the upset subassembly includes upset extension spring, rocker structure and limit structure, and adjusting device includes main shaft, slider and locking structure. Under the action of gravity, the slider compression reset spring of top, the tensile reset spring of slider of below, two telescopic links are no longer the collineation, two lock positions are staggered, it is spacing that the upset extension spring is relieved, order about the mounting panel and overturn to the level, when two telescopic links collineation once more, lock ring and two lock positions locking cooperation, with the rotation of locking telescopic link, and simultaneously, the length of length locking piece locking telescopic link, make the mounting panel locked at the horizontality, realize need not measure the ground inclination, angle of adjustment so that the mounting panel level by oneself, thereby the ascending vertical of elevating gear lifting direction has been guaranteed, high durability and convenient use.

Description

Lifting platform

Technical Field

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

Background

The lifting platform is a multifunctional hoisting, 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 the problem that various lifting operations meet the lifting requirements of different heights, so that the lifting platform is widely applied to various industries. Lifting platforms are typically leveled while on a sloped surface to ensure safety of the lifting process. In the prior art, for example, the name of publication No. CN110092316B is a lifting leveling device for an airport loading platform, which includes 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 and unloading platform; the front folding arm and the rear folding arm realize the lifting or the front and back pitching of the loading and unloading platform through the synchronous or independent movement of the lifting oil cylinders; the front translation leveling mechanism and the rear translation leveling mechanism have a horizontal degree of freedom and four vertical degrees of freedom at the same time, the horizontal degree of freedom movement of the front translation leveling mechanism and the rear translation leveling mechanism realizes the translation or rotation adjustment of the loading and unloading platform, the combined movement of the vertical degree of freedom realizes the fine adjustment or the left-right inclination adjustment of the lifting of the loading and unloading platform, however, the platform needs to be leveled after the inclination angle of the ground is measured, and then the lifting platform is manually leveled, so that the lifting operation can be carried out, and the operation is very inconvenient.

Disclosure of Invention

The invention provides a lifting platform, which aims to solve the problem that the lifting platform needs to be leveled manually after the gradient is measured on the ground with the gradient.

The lifting platform adopts the following technical scheme: a lifting platform comprises a base shell, a supporting device and an adjusting device. The base shells are arranged in front and back. The supporting device comprises a mounting plate and a turnover assembly. The mounting panel is equipped with two, and 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 upset subassembly includes upset extension spring, rocker structure and limit structure. The upset extension spring is equipped with two, and two upset extension springs are established both ends around the mounting panel respectively. Two ends of the turning tension spring at the front end are respectively connected with the front ends of the two mounting plates, two ends of the turning tension spring at the rear end are respectively connected with the rear ends of the two mounting plates, and the turning tension spring is in a force storage state.

The limiting structure is arranged between the base shell and the mounting plate and used for enabling the overturning tension spring to keep a force storage state and enabling the overturning tension spring to relieve limiting so as to contract when the road surface has a slope. 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 overturn towards the horizontal state when the overturning 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 at the left and the right. Two ends of the main shaft are fixed on the base shell.

The two sliding blocks are distributed 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 distributed on the front side and the rear side of the main shaft. The slide block 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 each telescopic rod is hinged to the corresponding sliding block, the other end of each telescopic rod is hinged to the corresponding main shaft, and when the mounting plate is horizontal, the two telescopic rods are collinear. The hinged 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 superposed. Be equipped with reset spring in the telescopic link for make the slider reset when the mounting panel upset to horizontality, and make two telescopic links the flexible volume when the mounting panel level the same with the collineation.

The locking structure includes an angle lock and a length lock. The angular locking member includes a locking ring. The locking ring is sleeved on the main shaft, the main shaft is provided with a rotating position and a clamping stopping position of the locking ring, when the locking ring is located at the rotating position, the locking ring can rotate and can be installed on the main shaft in a sliding mode along the main shaft, when the two locking positions are overlapped, the locking ring moves to the clamping stopping position to prevent the locking ring from rotating, and the locking ring is matched with the two locking positions in a locking mode 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 and the two locking positions are in locking fit, so that the mounting plate is locked in a horizontal state.

Further, the rocker arm structure comprises a front rocker arm group and a rear rocker arm group which are symmetrical about the main shaft center. The front rocker arm group comprises two front rocker arms which are bilaterally symmetrical. The front rocker arm member includes a front hinge shaft and two front rocker arms. The front articulated shaft is fixedly connected at 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 hinged 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 hinged 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 arms which are bilaterally symmetrical. The rear rocker arm member includes a rear hinge shaft and two rear rocker arms. The rear articulated shaft is fixedly connected at 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 articulated 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 hinged shaft, and the lower end of the rear rocker arm rod is hinged with the rear end of the corresponding mounting plate.

Furthermore, limit structure is equipped with two, establishes the mounting panel left and right sides symmetrically, including spacing groove and limiting 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, the angle locking pieces are two, and the two angle locking pieces are arranged on the two sides of the telescopic rod in a bilateral symmetry mode. The angle lock also includes a first snap ring, a second snap ring, and a driver. The first clamping ring is arranged between the telescopic rod and the locking ring. The first clamping ring is rotatably installed on the main shaft and fixedly installed on the telescopic rod located above, and the locking position of the telescopic rod located above is arranged on the first clamping ring. The first snap ring is provided with a first notch. The first notch is an upper locking position. The second snap ring is arranged between the locking ring and the first snap ring. The second clamping ring is rotatably arranged on the main shaft and fixedly arranged on the lower telescopic rod, and the locking position of the lower telescopic rod is arranged on the second clamping ring. The second snap ring is provided with a second gap. The second notch is a lower locking position, and when the mounting plate is in a horizontal state, the second notch and the first notch are superposed.

One side of the locking ring close to the second snap ring is provided with a locking block. Locking piece slidable mounting is in the second breach for when the lock ring is in when rotating the position, the lock ring can rotate along with the second snap ring, and when the mounting panel level, the lock ring removes to stopping the position, rotates in order to stop the lock ring, makes the locking piece slide insert first breach behind the second breach simultaneously, 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 clamping position.

Furthermore, the driving pieces are arranged in a bilateral symmetry mode and comprise driving racks, driving gears, worms, sleeves and push rings. The driving rack is arranged at the lower end of the limiting plate. The driving gear is rotatably mounted on the base housing and is located between the spindle and the driving rack. The driving rack is in meshing transmission with the driving gear. The worm is coaxially and fixedly connected to the driving gear. The sleeve is sleeved on the main shaft, and the spiral groove between the inner wall of the sleeve and the outer peripheral wall of the main shaft drives. The peripheral wall of the sleeve is in meshing transmission with the worm. The push ring is slidably sleeved on the main shaft 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 female rod is slidably sleeved on the outer side of the secondary rod. The length lock includes a lock rack, a lock gear, and a lock plate. The locking gear is rotatably mounted 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. A locking plate is slidably mounted on the female rod 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. A spline is arranged in the lock hole. The locking gear wheel rotating shaft is provided with a key groove at one end close to the locking plate, the key groove is used for pushing the locking plate to enable the locking gear wheel rotating shaft to be inserted into the locking hole when the push ring pushes the locking ring to move to the clamping position, and the spline is matched with the key groove.

Furthermore, a clamping groove is arranged at the clamping stop position. The locking ring periphery is equipped with the card protrudingly for when the locking ring removed to the card end position, the protruding card of card is gone into in the draw-in groove in order to prevent the locking ring rotation.

Furthermore, the lower end of the base shell is provided with a travelling wheel.

Furthermore, a lifting device is detachably mounted on the mounting plate above the base plate to achieve lifting, and after the mounting plate is adjusted to be horizontal, the lifting device is moved to the position above the mounting plate, and the base plate is fixed on the mounting plate above the base plate through bolts.

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

The invention has the beneficial effects that: when the lifting platform equipment is placed on the ground with slope, under the action of gravity, the upper sliding block compresses the reset spring, the lower sliding block stretches the reset spring, the two telescopic rods are not collinear any more, so that the two locking positions are staggered, then the overturning tension spring is relieved from limiting, the mounting plate is overturned towards the horizontal state under the cooperation of the rocker arm structure, when the mounting plate is overturned 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 matched with the two locking positions in a locking manner to lock the rotation between the telescopic rods and the main shaft, meanwhile, the length of the telescopic rods is locked by the length locking piece, so that the mounting plate is locked at the horizontal state, the angle can be automatically adjusted to enable the mounting plate to be horizontal without measuring the inclination angle of the ground, the vertical lifting direction of the lifting device is ensured, and the use is convenient and rapid.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an embodiment of an elevating platform according to the present invention;

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

FIG. 3 is a schematic structural view of a supporting device and an adjusting device according to an embodiment of the 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 taken at A in FIG. 4;

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 taken at B-B of FIG. 6;

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

FIG. 10 is an enlarged view taken at D in FIG. 8;

FIG. 11 is a schematic structural view of an adjustment 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 the angle lock of the embodiment of the present invention;

FIG. 14 is a schematic view of the spindle of the embodiment of the present invention;

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

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

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

An embodiment of an elevator platform of the present invention is shown in fig. 1 to 15: an elevating platform comprises a base shell 150, a supporting device and an adjusting device. The base housing 150 is disposed in front and rear, and the upper portion is hollow and is provided with a mounting groove. The support device is arranged in the mounting groove and comprises a mounting plate 211 and a turnover assembly. The mounting panel 211 is equipped with two, parallel arrangement about two mounting panels 211, and the front end projection of the mounting panel 211 of top is in the mounting panel 211 middle part of below. The mounting plate 211 is rotatably mounted on the base housing 150.

The turnover assembly comprises a turnover tension spring 310, a rocker arm structure and a limiting structure. The two turnover tension springs 310 are respectively arranged at the front end and the rear end of the mounting plate 211. Two ends of the turning tension spring 310 at the front end are respectively connected with the front ends of the two mounting plates 211, two ends of the turning tension spring 310 at the rear end are respectively connected with the rear ends of the two mounting plates 211, and the turning tension spring 310 is in a power storage state. The limit structure is provided between the base housing 150 and the mounting plate 211, for keeping the reverse tension spring 310 in a power storage state, and releasing the limit of the reverse tension spring 310 to be contracted when the road surface has a slope.

The rocker arm structure is arranged at the front end and the rear end of the mounting plate 211 and is configured to drive the mounting plate 211 to turn towards the horizontal state when the turning tension spring 310 contracts. The adjusting device is arranged between the two mounting plates 211 and comprises a main shaft 241, a sliding block 221 and a locking structure.

The main shaft 241 is provided left and right. Both ends of the main shaft 241 are fixed to the base housing 150. The number of the sliding blocks 221 is two, the two sliding blocks 221 are distributed on the upper side and the lower side of the main shaft 241, and the projections of the two sliding blocks 221 on the horizontal plane are distributed on the front side and the rear side of the main shaft 241. The sliders 221 are slidably mounted on the corresponding mounting plates 211 in the front-rear direction. An expansion link is arranged between the slide block 221 and the main shaft 241. One end of the telescopic rod is hinged on the sliding block 221, the other end of the telescopic rod is hinged on the main shaft 241, and when the mounting plate 211 is horizontal, the two telescopic rods are collinear. The articulated ends of the telescopic rods and the main shaft 241 are predisposed with a locking position, and when the two telescopic rods are collinear, the two locking positions coincide. Be equipped with reset spring in the telescopic link for make slider 221 reset when mounting panel 211 upset to horizontality, and make two telescopic links the same with the collineation in flexible volume when mounting panel 211 is horizontal.

The locking structure includes an angle lock and a length lock. The angular locking member comprises a locking 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 stop position of the locking ring 233, so that when the locking ring 233 is in the rotation position, the locking ring 233 can rotate and can be slidably mounted on the main shaft 241 along the main shaft 241, and when the two telescopic rods and the locking positions on the hinged end of the main shaft 241 are overlapped, the locking ring 233 moves to the stop 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. The length locking member is used to lock the length of the telescopic bar when the locking ring 233 and the two locking positions are lockingly engaged, so that the mounting plate 211 is locked in a horizontal state. When the lifting platform equipment is placed on the ground with slope, under the action of gravity, the upper sliding block 221 compresses the reset spring, the lower sliding block 221 stretches the reset 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 towards the horizontal state under the cooperation of the rocker arm structure, when the mounting plate 211 is overturned to the horizontal state, the two telescopic rods are collinear again, the locking ring 233 moves to the 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, meanwhile, the length of the telescopic rods is locked by the length locking piece, so that the mounting plate 211 is locked at the horizontal state, the purpose of automatically adjusting the angle to enable the mounting plate 211 to be horizontal without measuring the inclination angle of the ground is achieved, the verticality in the lifting direction of the lifting device 100 is ensured, and the lifting platform equipment is convenient and rapid to use.

In the present embodiment, the rocker arm structure includes a front rocker arm group and a rear rocker arm group that are centrosymmetric about the main shaft 241. The front rocker arm group comprises two front rocker arms which are bilaterally symmetrical. The front rocker member includes a front hinge shaft and two front rocker arms 213. The front hinge shaft is fixedly coupled to the front end of the base housing 150. Two front rocker arms 213 are disposed at front and rear sides of the front hinge shaft. The front rocker arm 213 is arranged up and down, the lower end is hinged on the front hinge shaft, and the upper end is hinged with the front end of the corresponding mounting plate 211. The rear rocker arm group comprises two rear rocker arms which are bilaterally symmetrical. The rear rocker member includes a rear hinge shaft and two rear rocker arms 214. The rear hinge shaft is fixedly coupled to the rear end of the base housing 150. Two rear rocker arms 214 are disposed on the front and rear sides of the rear hinge shaft. The rear rocker arm 214 is disposed up and down, and has an upper end hinged to the rear hinge shaft and a lower end hinged to the rear end of the corresponding mounting plate 211. The reverse tension spring 310, when retracted, drives the two mounting plates 211 toward each other in the forward-backward direction and causes the two front rocker levers 213 to approach each other and the two rear rocker levers 214 to approach each other. The two front rocker arms 213 lift the front end of the mounting plate 211 upward while approaching each other, and the two rear rocker arms 214 drop the rear end of the mounting plate 211 downward while approaching each other.

In this embodiment, two limiting structures are provided, symmetrically provided on the left and right sides of the mounting plate 211, including the limiting grooves and the limiting plates 160. The limiting groove is arranged on the mounting plate 211. The stopper plate 160 is slidably mounted on the base housing 150 along the main shaft 241, and the stopper plate 160 is slidably inserted into the stopper groove. In use, the limit plate 160 is pulled out of the limit groove to free the mounting plate 211 from the limit, thereby restoring the ability of the mounting plate 211 to rotate on the base housing 150.

In this embodiment, the angle locking piece is equipped with two, and two angle locking pieces are established in the telescopic link both sides bilateral symmetry. The angle lock also includes a first snap ring 231, a second snap ring 232, and a driver. A first snap ring 231 is provided between the telescoping rod and the locking ring 233. The first snap ring 231 is rotatably mounted on the main shaft 241 and is fixedly mounted on the upper telescopic link, and the lock position of the upper telescopic link 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 locking ring 233 and the first snap ring 231. The second snap ring 232 is rotatably mounted on the main shaft 241 and is fixedly mounted on the lower telescopic rod, and the lock position of the lower telescopic rod is disposed on the second snap ring 232. A second notch is formed on the second snap ring 232. The second notch is a lower lock position, and when the mounting plate 211 is in a horizontal state, the second notch and the first notch coincide.

A locking piece 234 is disposed on a side of the locking ring 233 adjacent to the second snap ring 232. The locking piece 234 is slidably mounted in the second notch, and is used for when the locking ring 233 is in the rotation position, the locking ring 233 can rotate along with the second snap ring 232, and when the mounting plate 211 is horizontal, the locking ring 233 moves to the stop position to stop the locking ring 233 to rotate, and meanwhile, the locking piece 234 slides through the second notch and then is inserted into the first notch, so that the rotation locking between the telescopic rod and the main shaft 241 is realized.

The driving member drives the lock ring 233 to move from the rotational position to the locking position. The driving member pushes the locking ring 233 and drives the locking piece 234 to move to the locking position, and the locking piece is locked in the locking slot 410 to prevent the locking ring 233 from rotating. Meanwhile, the locking block 234 is clamped into the first notch, so that the rotation between the telescopic rod and the main shaft 241 is locked.

In the present embodiment, there are two driving members arranged in bilateral symmetry, including a driving rack, a driving gear, a worm 245, a sleeve 242 and a push ring 243. The driving rack is arranged at the lower end of the limit plate 160. A drive gear is rotatably mounted on the base housing 150 between the main shaft 241 and the drive rack. The driving rack is in meshing transmission with the driving gear. The worm 245 is coaxially fixedly connected to the driving gear. The sleeve 242 is sleeved on the main shaft 241, and the inner wall of the sleeve 242 and the outer peripheral wall of the main shaft 241 are in spiral groove transmission. The peripheral wall of the sleeve 242 is in meshing engagement with the worm 245. The push ring 243 is slidably fitted over the main shaft 241 and is located between the lock 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 is used for storing the force of the buffer spring 244 when the buffer sleeve 242 pushes the push ring 243 before the first gap and the second gap are overlapped, so that the push ring 243 pushes the locking ring 233 to enable the locking block 234 to be pressed against the first snap ring 231, and when the first gap and the second gap are overlapped, the force is released for the first time to push the locking block 234 into the first gap, so that the rotation angle of the telescopic rod is locked.

In the present embodiment, the telescopic bar includes a sub bar 222 and a female bar 223. The female rod 223 is slidably fitted over the outer side of the male rod 222.

The length lock includes a lock rack 420, a lock gear, and a lock plate 224. The locking gear is rotatably mounted on the female rod 223. The locking rack 420 is disposed along the length of the sub-rod 222, and has one end fixedly coupled to the sub-rod 222 and the other end engaged with the locking gear. The locking plate 224 is disposed along the length of the female rod 223. The locking plate 224 is slidably mounted on the female rod 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. A spline is arranged in the lock hole. One end of the locking gear rotating shaft 225 close to the locking plate 224 is provided with a key groove for pushing the locking plate 224 to insert the locking gear rotating shaft 225 into the locking hole while the pushing ring 243 pushes the locking ring 233 to move to the locking position, and the spline and the key groove are in key fit to lock the length of the telescopic rod.

In this embodiment, the locking position is provided with a locking slot 410. The locking ring 233 is provided at an outer circumference thereof with a catching protrusion for catching the locking ring 233 into the catching groove 410 to prevent the locking ring 233 from rotating when the locking ring 233 moves to the catching position. When the mounting plate 211 is horizontal, the two telescoping rods are collinear, and the locking ring 233 slides into the slot 410 as the locking block 234 enters the first notch. The card slot 410 mates with the card stop.

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

In this embodiment, the upper mounting plate 211 is detachably mounted with a lifting device 100 to realize 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 connection seat 320 is connected to both ends of the reverse tension spring 310. The connection base 320 is rotatably installed on the installation plate 211 for allowing the reverse tension spring to rotate properly as the installation plate 211 rotates.

With the above embodiments, the usage principle and the working process of the present invention are as follows: when using on the ground that has the slope, first step, place base shell 150 front end orientation slope down, under the effect of gravity, the slider 221 that is in the top compresses the reset spring downwards to make the telescopic link shrink of top and rotate around main shaft 241, the slider 221 that is in the below stretches reset spring downwards, and make the telescopic link extension of below and rotate around main shaft 241, two telescopic links are no longer the collineation, make first breach and second breach stagger.

Second, the limiting plate 160 is pulled out of the limiting groove. On the one hand, the reverse tension spring 310 is released from the limit to be contracted. That is, under the contraction of the reverse tension spring 310, the two mounting plates 211 are driven to approach each other in the front-rear direction, and the two front rocker arms 213 and the two rear rocker arms 214 approach each other. The front ends of the mounting plates 211 are lifted upward as the two front rocker arms 213 approach each other, and the rear ends of the mounting plates 211 are lowered downward as the two rear rocker arms 214 approach each other. That is, the mounting plate 211 is rotated in the horizontal direction in cooperation with the reverse tension spring 310 and the swing arm structure. On the other hand, when the stopper plate 160 pulls the drive rack out of the stopper groove, the drive rack rotates the drive gear, the drive gear rotates the worm 245, and the worm 245 drives the sleeve 242 to rotate and pushes the push ring 243 to move toward the lock ring 233 by the buffer spring 244. In this process, the buffer spring 244 accumulates force. Since the first notch and the second notch are already 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 since 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.

Thirdly, 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 obtain balance, that is, the two return springs have the same power storage state, so that the extension amounts of the upper and lower telescopic rods are the same. The two telescopic rods are again collinear so that the first and second gaps coincide again. The buffer spring 244 releases the force to push the locking ring 233 to move to the locking position with the locking piece 234, and the locking projection is locked in the locking groove 410 to prevent the locking ring 233 from rotating. Meanwhile, the locking block 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 to enable the spline and the key groove to be matched to prevent the locking gear from rotating, the locking gear prevents the relative sliding of the secondary rod 222 and the primary rod 223 through the locking rack 420, the length of the telescopic rod is locked, and the mounting plate 211 is locked in a horizontal state. Therefore, when the slope road surface is on, the inclination of the slope road does not need to be measured, only the limiting plate 160 needs to be pulled out, and the mounting plate 211 can automatically adjust the angle to be in a horizontal state and automatically lock. After 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 that the lifting device 100 is vertical in the lifting direction and convenient and fast to use.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

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

the base shells are arranged in 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 in the middle of the lower mounting plate; the mounting plate is rotatably arranged 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; two ends of the turning tension spring at the front end are respectively connected with the front ends of the two mounting plates, two ends of the turning tension spring at the rear end are respectively connected with the rear ends of the two mounting plates, and the turning tension spring is in a force storage state;

the limiting structure is arranged between the base shell and the mounting plate and used for keeping the overturning tension spring in a power storage state and releasing the overturning tension spring for limiting to contract when the road surface has a slope;

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 towards the horizontal state when the turning 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; two ends of the main shaft are fixed on the base shell;

the two sliding blocks are distributed 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 distributed 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 and back directions; a telescopic rod is arranged between the sliding block and the main shaft; one end of each telescopic rod is hinged to the corresponding sliding block, the other end of each telescopic rod is hinged to the corresponding main shaft, and when the mounting plate is horizontal, the two telescopic rods are collinear; the hinge joint end of the telescopic rod and the main shaft is preset with a locking position, and when the two telescopic rods are collinear, the two locking positions are superposed; a return spring is arranged in the telescopic rods and used for returning the sliding blocks when the mounting plate is turned to be in a horizontal state, and the telescopic quantities of the two telescopic rods are the same to be collinear when the mounting plate is in the horizontal state;

the locking structure comprises an angle locking piece and a length locking piece; the angle locking member includes a locking ring; the locking ring is sleeved on the main shaft, the main shaft is provided with a rotating position and a clamping position of the locking ring, the locking ring can rotate and can be slidably arranged on the main shaft along the main shaft when the locking ring is positioned at the rotating position, when the two locking positions are overlapped, 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 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 and the two locking positions are in locking fit, so that the mounting plate is locked in a horizontal state.

2. An elevator platform according to claim 1, wherein: 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 arms which are bilaterally symmetrical; the front rocker arm component comprises a front articulated shaft and two front rocker arms; the front articulated shaft is fixedly connected with 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 articulated 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 hinged 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 arms which are bilaterally symmetrical; the rear rocker arm component comprises a rear articulated shaft and two rear rocker arms; the rear articulated 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 articulated 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 hinged shaft, and the lower end of the rear rocker arm rod is hinged with the rear end of the corresponding mounting plate.

3. An elevator platform as claimed in claim 2, wherein: 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, and the limiting plate is slidably inserted in the limiting groove.

4. An elevator platform as claimed in claim 3, wherein: the two angle locking pieces are arranged on the two sides of the telescopic rod in a bilateral symmetry manner; the angle locking piece also 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 upper telescopic rod, and the locking position of the upper telescopic rod is arranged on the first clamping ring; a first notch is arranged on the first clamping ring; the first notch is an upper locking position;

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 lower telescopic rod, and the locking position of the lower telescopic rod is arranged on the second clamping ring; a second notch is arranged on the second clamping ring; the second notch is a lower locking position and is superposed with the first notch when the mounting plate is in a horizontal state;

a locking block is arranged on one side, close to the second clamping ring, of the locking ring; the locking block is slidably arranged in the second notch, the locking ring can rotate along with the second clamping ring when the locking ring is located at the rotating position, the locking ring moves to the 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 between the telescopic rod and the main shaft is locked;

the driving piece is used for driving the locking ring to move from the rotating position to the clamping position.

5. An elevator platform as claimed in claim 4, wherein: the two driving pieces are arranged in bilateral symmetry and comprise driving racks, driving gears, worms, sleeves and push rings;

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 is in meshing transmission with the driving gear; the worm is coaxially and fixedly connected to the driving gear; the sleeve is sleeved on the main shaft, and the inner wall of the sleeve and the outer peripheral wall of the main shaft are in spiral groove transmission; the peripheral wall of the sleeve is in meshing transmission with the worm;

the push ring is sleeved on the main shaft in a sliding manner 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.

6. An elevator platform as claimed in claim 5, wherein: the telescopic rod comprises a sub rod and a main rod; the female rod is sleeved outside the male rod in a sliding manner;

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 wheel rotating shaft is provided with a key groove at one end close to the locking plate, the key groove is used for pushing the locking plate to enable the locking gear wheel rotating shaft to be inserted into the locking hole when the push ring pushes the locking ring to move to the clamping position, and the spline is matched with the key groove.

7. An elevator platform as claimed in claim 6, wherein: a clamping groove is arranged at the clamping stop position; the locking ring periphery is equipped with the card protrudingly for when the locking ring removed to the card and stops the position, the protruding card of card is gone into in the draw-in groove in order to prevent the locking ring rotation.

8. An elevator platform as claimed in claim 1, wherein: the lower end of the base shell is provided with a traveling wheel.

9. An elevator platform according to claim 1, wherein: and a lifting device is detachably arranged on the mounting plate above the lifting device to realize lifting.

10. An elevator platform according to claim 1, wherein: two ends of the turning tension spring are connected with connecting seats; the connecting seat is rotatably arranged on the mounting plate.