Jacking device and vehicle

Abstract

The utility model discloses a jacking device and a vehicle, the jacking device comprises a chassis, a platform, a connecting rod assembly and a driving part, and the chassis is provided with a first hinge seat and a second hinge seat; a third hinge seat and a fourth hinge seat are arranged on the platform; the first end of the connecting rod assembly is hinged to the first hinge base and the third hinge base, and the second end of the connecting rod assembly is hinged to the second hinge base and the fourth hinge base. The driving part is connected to the middle of the connecting rod assembly, the middle of the connecting rod assembly is located between the first end and the second end of the connecting rod assembly, and the driving part drives the connecting rod assembly to move in the second direction so as to adjust the distance between the chassis and the platform in the first direction. According to the jacking device, the driving component is connected to the middle of the connecting rod assembly, so that the overall stress of the connecting rod assembly is balanced, and the overall stability of the jacking device is improved.

Description

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on December 22, 2023, with application number 2023235341805 and application name “Jacking device and vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of vehicle technology, and in particular to a jacking device and a vehicle. Background Art

[0003] An AGV (Automatic Guided Vehicle) is an automated guided transport vehicle equipped with electromagnetic or optical guidance systems. It can travel along a prescribed path and offers safety features and various load-carrying functions. A jack-up AGV has a lifting mechanism that allows it to reach the bottom of a shelf, lift the entire shelf, and then lower it to its target location, effectively moving materials.

[0004] In existing AGVs, the lifting driving force of the lifting device acts on one end of the connecting rod mechanism, and the lifting mechanism is subjected to unbalanced force, resulting in poor overall stability of the lifting mechanism. Utility Model Content

[0005] The purpose of this application is to provide a jacking device and a vehicle to solve the problem of unbalanced force on the jacking device.

[0006] To achieve the purpose of this application, this application provides the following technical solutions:

[0007] In a first aspect, the present application provides a lifting device, comprising:

[0008] A chassis, wherein a first hinge seat and a second hinge seat are provided on the chassis;

[0009] A platform is spaced apart from the chassis along a first direction, and a third hinge seat and a fourth hinge seat are provided on the platform;

[0010] a connecting rod assembly, wherein a first end of the connecting rod assembly is hinged to the first hinge seat and the third hinge seat, and a second end of the connecting rod assembly is hinged to the second hinge seat and the fourth hinge seat;

[0011] A driving component is connected to the middle portion of the connecting rod assembly, the middle portion of the connecting rod assembly is located between the first end and the second end of the connecting rod assembly, and the driving component drives the connecting rod assembly to move in a second direction to adjust the distance between the chassis and the platform in the first direction, and the second direction is different from the first direction.

[0012] In one embodiment, the connecting rod assembly includes a first connecting rod, a second connecting rod and a third connecting rod, wherein the first end of the first connecting rod is hinged to the first hinge seat, the first end of the second connecting rod is hinged to the second hinge seat, the first end of the third connecting rod is hinged to the second end of the first connecting rod and the third hinge seat, and the second end of the third connecting rod is hinged to the second end of the second connecting rod and the fourth hinge seat;

[0013] The driving component is connected to the middle portion of the third connecting rod, the middle portion of the third connecting rod is located between the first end and the second end of the third connecting rod, and the driving component drives the third connecting rod to move in the second direction.

[0014] In one embodiment, the driving component includes a driving body, a rotating shaft and a crank, the driving body drives the rotating shaft to rotate, the first end of the crank is fixed to the rotating shaft, and the second end of the crank is connected to the middle part of the third connecting rod.

[0015] In one embodiment, the rotation axis extends along a third direction, and the third direction is perpendicular to the first direction.

[0016] In one embodiment, a guide groove extending along the length direction of the third connecting rod is provided in the middle portion of the third connecting rod, and a first roller is provided on the second end of the crank, and the first roller is disposed in the guide groove.

[0017] In one embodiment, the guide groove includes a limiting groove wall and an opening, and the limiting groove wall and the opening are respectively provided at two ends of the guide groove along the length direction of the third connecting rod.

[0018] In one embodiment, the connecting rod assembly also includes a fourth connecting rod and a fifth connecting rod, the first end of the fourth connecting rod is hinged to the first end of the third connecting rod, the second end of the fourth connecting rod is hinged to the third articulated seat, the first end of the fifth connecting rod is hinged to the second end of the third connecting rod, and the second end of the fifth connecting rod is hinged to the fourth articulated seat.

[0019] In one embodiment, a second roller is provided on one of the chassis and the platform, and a guide rail is provided on the other of the chassis and the platform. The guide rail extends along the first direction, and the second roller is provided in the guide rail.

[0020] In one embodiment, the jacking device further includes a support frame, two connecting rod assemblies are provided, the two connecting rod assemblies are spaced apart, the support frame is connected between the two connecting rod assemblies, and the driving component is connected to at least one of the connecting rod assemblies.

[0021] In one embodiment, the chassis is further provided with a fifth hinge seat and a sixth hinge seat, the support frame includes a first support rod and a second support rod, each of the connecting rod assemblies includes a first connecting rod, a second connecting rod and a third connecting rod, and in one of the two connecting rod assemblies,

[0022] The first end of the first connecting rod is hinged to the first hinge seat, the first end of the second connecting rod is hinged to the second hinge seat, the first end of the third connecting rod is hinged to the second end of the first connecting rod and the first end of the first support rod, and the second end of the third connecting rod is hinged to the second end of the second connecting rod and the first end of the second support rod;

[0023] In the other of the two connecting rod assemblies,

[0024] The first end of the first connecting rod is hinged to the fifth hinge seat, the first end of the second connecting rod is hinged to the sixth hinge seat, the first end of the third connecting rod is hinged to the second end of the first connecting rod and the second end of the first support rod, and the second end of the third connecting rod is hinged to the second end of the second connecting rod and the second end of the second support rod;

[0025] The driving component is connected to the middle portion of one of the third connecting rods.

[0026] In a second aspect, the present application provides a vehicle comprising a driving wheel and the jacking device as described above, wherein the driving wheel is rotatably connected to the chassis.

[0027] The jacking device and vehicle provided in the embodiments of the present application are configured such that the first end of the connecting rod assembly is hinged to the first hinge seat and the third hinge seat, and the second end of the connecting rod assembly is hinged to the second hinge seat and the fourth hinge seat. The driving component drives the connecting rod assembly to move in the second direction, and can drive the platform connected to the connecting rod assembly to move in the first direction to adjust the distance between the platform and the chassis in the first direction, thereby realizing the lifting and lowering of the platform; by connecting the driving component to the middle part of the connecting rod assembly, the overall force of the connecting rod assembly is balanced, thereby improving the overall stability of the jacking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the implementation methods or the description of the prior art. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A schematic diagram of a portion of the structure of a vehicle according to an embodiment of the present application;

[0030] Figure 2 for Figure 1 Side view of;

[0031] Figure 3 This is a schematic structural diagram of a jacking device according to one embodiment of the present application;

[0032] Figure 4 This is a schematic structural diagram of a third connecting rod according to an embodiment of the present application;

[0033] Figure 5 This is a schematic structural diagram of a guide rail and a second roller according to an embodiment of the present application;

[0034] Figure 6 This is a schematic structural diagram of a platform according to one embodiment of the present application;

[0035] Figure 7 This is a schematic structural diagram of a connecting rod assembly and a support frame according to an embodiment of the present application;

[0036] Figure 8 This is a schematic structural diagram of the first support rod and the first connecting rod in one embodiment of the present application.

[0037] Description of reference numerals:

[0038] 100, driving wheel; 200, chassis; 210, first articulated seat; 220, second articulated seat; 230, guide rail; 240, fifth articulated seat; 250, sixth articulated seat; 300, platform; 310, third articulated seat; 311, first through-hole; 312, second through-hole; 320, fourth articulated seat; 321, third through-hole; 322, fourth through-hole; 330, second roller; 340, first mounting plate; 350, second mounting plate; 400, connecting rod assembly ; 410, first connecting rod; 420, second connecting rod; 430, third connecting rod; 431, guide groove; 431a, limiting groove wall; 431b, opening; 440, fourth connecting rod; 450, fifth connecting rod; 500, driving component; 510, driving body; 520, crank; 521, first roller; 530, reducer; 600, support frame; 610, first support rod; 620, second support rod; 630, third support rod; 640, fourth support rod. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0040] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be an intermediate component.

[0041] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used in this application includes any and all combinations of one or more of the relevant listed items.

[0042] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0043] An AGV (Automatic Guided Vehicle) is an automated guided vehicle equipped with electromagnetic or optical guidance systems. It can travel along a prescribed path and offers safety features and various load-carrying functions. A jacking AGV has a lifting mechanism that allows it to reach the bottom of a shelf, lift the entire shelf, and then lower it to its target location, effectively moving materials.

[0044] In existing AGVs, the lifting driving force of the lifting device acts on one end of the connecting rod mechanism, and the lifting mechanism is subjected to unbalanced force, resulting in poor overall stability of the lifting mechanism.

[0045] refer to Figure 1 The present application provides a vehicle, which includes a driving wheel 100 and a lifting device, and the lifting device includes a chassis 200 and a platform 300. The driving wheel 100 is rotatably connected to the chassis 200, and the driving wheel 100 rotates to drive the vehicle to travel. Specifically, the vehicle of the present application is an automated guided vehicle (AGV). The platform 300 in the lifting device can be raised and lowered relative to the chassis 200. The rotation of the driving wheel 100 and the raising and lowering of the platform 300 are controlled by a control system to realize the automatic travel of the vehicle and the transportation of materials. When materials need to be transported, the vehicle travels to the bottom of the shelf, and the lifting device is used to raise the platform 300. The shelf is supported on the bottom of the shelf to lift the entire shelf. Then, after reaching the target position, the platform 300 is lowered to place the shelf on the ground to realize the transportation of materials.

[0046] refer to Figure 1 、 Figure 2 and Figure 3 The present application provides a jacking device, including a chassis 200, a platform 300, a connecting rod assembly 400 and a driving component 500. There are two driving wheels 100, which are rotatably connected to both sides of the chassis 200 respectively. The chassis 200 is provided with a first articulated seat 210 and a second articulated seat 220; the platform 300 and the chassis 200 are separated along the first direction, and the platform 300 is provided with a third articulated seat 310 and a fourth articulated seat 320; the first end of the connecting rod assembly 400 is articulated with the first articulated seat 210 and the third articulated seat 310, and the second end of the connecting rod assembly 400 is articulated with the second articulated seat 220 and the fourth articulated seat 320; the driving component 500 is connected to the middle part of the connecting rod assembly 400, and the middle part of the connecting rod assembly 400 is located between the first end and the second end of the connecting rod assembly 400. The driving component 500 drives the connecting rod assembly 400 to move in the second direction to adjust the distance d between the chassis 200 and the platform 300 in the first direction. The second direction is different from the first direction.

[0047] In the present application, the height direction of the chassis 200 is the first direction X, the width direction of the chassis 200 is the third direction Z, the third direction Z is perpendicular to the first direction X, the second direction is located in a plane perpendicular to the third direction Z, the second direction changes with the movement of the connecting rod assembly 400, and the second direction includes the length direction Y of the chassis 200.

[0048] In the jacking device provided in the embodiment of the present application, the platform 300 is arranged parallel to the chassis 200, and the platform 300 is a material carrying platform. By hingedly connecting the first end of the connecting rod assembly 400 to the first hinge seat 210 and the third hinge seat 310, and hingedly connecting the second end of the connecting rod assembly 400 to the second hinge seat 220 and the fourth hinge seat 320, the driving component 500 drives the connecting rod assembly 400 to move in the second direction, and can drive the platform 300 connected to the connecting rod assembly 400 to move in the first direction X, so as to adjust the distance d between the platform 300 and the chassis 200 in the first direction X, thereby realizing the lifting and lowering of the platform 300; by connecting the driving component 500 to the middle part of the connecting rod assembly 400, the overall force of the connecting rod assembly 400 is balanced, thereby improving the overall stability of the jacking device.

[0049] Specifically, the connecting rod assembly 400 includes a first connecting rod 410, a second connecting rod 420 and a third connecting rod 430. The first end of the first connecting rod 410 is hinged to the first hinge seat 210, the first end of the second connecting rod 420 is hinged to the second hinge seat 220, the first end of the third connecting rod 430 is hinged to the second end of the first connecting rod 410 and the third hinge seat 310, and the second end of the third connecting rod 430 is hinged to the second end of the second connecting rod 420 and the fourth hinge seat 320; that is, the chassis 200, the first connecting rod 410, the second connecting rod 420 and the third hinge seat 320 are hinged. 0 and the third link 430 are connected to form a quadrilateral structure in the plane of the first direction X and the second direction. The driving component 500 is connected to the middle part of the third link 430, and the middle part of the third link 430 is located between the first end and the second end of the third link 430. The driving component 500 drives the third link 430 to move in the second direction, and can drive the platform 300 connected to the third link 430 to move in the first direction X, so as to adjust the distance between the platform 300 and the chassis 200 in the first direction X, thereby realizing the lifting and lowering of the platform 300.

[0050] The driving component 500 includes a driving body 510, a rotating shaft and a crank 520. The driving body 510 drives the rotating shaft to rotate. The crank 520 extends radially along the rotating shaft. The first end of the crank 520 is fixed on the rotating shaft, and the second end of the crank 520 is connected to the middle part of the third connecting rod 430. Among them, the driving body 510 can be a motor, an engine, etc. The driving force output by the driving body 510 is transmitted to the rotating shaft after the reducer 530. The rotation of the rotating shaft drives the crank 520 to swing. The swing of the crank 520 causes the third connecting rod 430 to move in an arc in a plane perpendicular to the third direction Z. The second direction changes with the movement of the third connecting rod 430. In the plane formed by the first direction X and the second direction, the third connecting rod 430 moves in the second direction under the drive of the crank 520, thereby rotating the first connecting rod 410 and the second connecting rod 420, so that the platform 300 connected to the third connecting rod 430 can move in the first direction X, thereby adjusting the distance d between the platform 300 and the chassis 200, and realizing the lifting and lowering of the platform 300.

[0051] In one embodiment, the rotating shaft extends along a third direction Z, which is perpendicular to the first direction X. Specifically, the driving body 510, the reducer 530, and the rotating shaft are sequentially arranged along the third direction Z, thereby reducing the space occupied by the lifting device in the first direction X, and making the distance d between the platform 300 and the chassis 200 smaller to accommodate lower shelf transportation.

[0052] refer to Figure 3 and Figure 4A guide groove 431 extending along the length of the third connecting rod 430 is provided in the middle of the third connecting rod 430. A first roller 521 is provided on the second end of the crank 520 and is disposed in the guide groove 431. In the present application, the first roller 521 cooperates with the guide groove 431 of the third connecting rod 430, allowing the first roller 521 to roll relative to the groove wall of the guide groove 431, thereby making the crank 520 drive the third connecting rod 430 to move more smoothly.

[0053] The guide groove 431 includes a limiting groove wall 431a and an opening 431b, which are respectively provided at both ends of the guide groove 431 along the length direction of the third connecting rod 430. Specifically, the third connecting rod 430 extends along the length direction Y of the chassis 200. The limiting groove wall 431a and the opening 431b are located at both ends of the guide groove 431 in the length direction Y of the chassis 200. The opening 431b allows the first roller 521 to enter the guide groove 431. When the driving body 510 drives the crank 520 to swing, the first roller 521 can abut against the limiting groove wall 431a. The limiting groove wall 431a can limit the position of the first roller 521 after the platform 300 rises to a desired height, thereby improving the stability of the platform 300 when it is stationary.

[0054] refer to Figure 2 、 Figure 3 、 Figure 5 and Figure 6 The connecting rod assembly 400 also includes a fourth connecting rod 440 and a fifth connecting rod 450. The first end of the fourth connecting rod 440 is hinged to the first end of the third connecting rod 430, the second end of the fourth connecting rod 440 is hinged to the third hinge seat 310, the first end of the fifth connecting rod 450 is hinged to the second end of the third connecting rod 430, and the second end of the fifth connecting rod 450 is hinged to the fourth hinge seat 320. Specifically, the third link 430, the fourth link 440, the fifth link 450 and the platform 300 are connected to form another quadrilateral structure, and the third link 430 is driven to move in the second direction by the driving component 500, so that the distance between the third link 430 and the platform 300 changes; wherein, the distance between the platform 300 and the third link 430 increases as the distance between the third link 430 and the chassis 200 increases, and the distance between the platform 300 and the third link 430 decreases as the distance between the third link 430 and the chassis 200 decreases, so that the distance d between the platform 300 and the chassis 200 can be changed by driving the third link 430 to move.

[0055] In the present application, a second roller 330 is provided on one of the chassis 200 and the platform 300, and a guide rail 230 is provided on the other of the chassis 200 and the platform 300. The guide rail 230 extends along the first direction X, and the second roller 330 is disposed in the guide rail 230. Specifically, a first mounting plate 340 and a second mounting plate 350 are provided on the platform 300. Two second rollers 330 are provided, and the two second rollers 330 are rotatably connected to the first mounting plate 340 and the second mounting plate 350, respectively. The guide rail 230 is provided on the chassis 200. Through the cooperation between the second rollers 330 and the guide rail 230, the platform 300 moves only in the first direction X, thereby lifting or lowering materials.

[0056] refer to Figure 2 、 Figure 6 、 Figure 7 and Figure 8 The jacking device further includes a support frame 600. Two connecting rod assemblies 400 are provided, and the support frame 600 is connected between the two connecting rod assemblies 400. Specifically, the two connecting rod assemblies 400 are spaced apart in the third direction Z. The two connecting rod assemblies 400 are connected between the chassis 200 and the platform 300 to improve the stability of the platform 300. The two connecting rod assemblies 400 are connected by the support frame 600. The driving component 500 is connected to the third connecting rod 430 in at least one of the connecting rod assemblies 400, and the two connecting rod assemblies 400 are synchronized through the support frame 600 to drive the platform 300 to rise and fall.

[0057] In one embodiment, the chassis 200 is further provided with a fifth hinge seat 240 and a sixth hinge seat 250, the support frame 600 includes a first support rod 610 and a second support rod 620, each connecting rod assembly 400 includes a first connecting rod 410, a second connecting rod 420 and a third connecting rod 430, and in one of the two connecting rod assemblies 400, the first end of the first connecting rod 410 is hinged to the first hinge seat 210, the first end of the second connecting rod 420 is hinged to the second hinge seat 220, the first end of the third connecting rod 430 is hinged to the second end of the first connecting rod 410 and the first end of the first support rod 610, and the third connecting rod 430 is hinged to the second end of the first connecting rod 410 and the first end of the first support rod 610. The second end of the rod 430 is hinged to the second end of the second link 420 and the first end of the second support rod 620; in the other link assembly 400 of the two link assemblies 400, the first end of the first link 410 is hinged to the fifth hinge seat 240, the first end of the second link 420 is hinged to the sixth hinge seat 250, the first end of the third link 430 is hinged to the second end of the first link 410 and the second end of the first support rod 610, and the second end of the third link 430 is hinged to the second end of the second link 420 and the second end of the second support rod 620; the driving component 500 is connected to the middle part of a third link 430. Specifically, the two ends of the first support rod 610 are respectively hinged to the first ends of the two third connecting rods 430, and the two ends of the second support rod 620 are respectively hinged to the second ends of the two third connecting rods 430 and then connected to one of the third connecting rods 430 through a driving component 500 to achieve synchronous movement of the two connecting rod assemblies 400; when assembling the jacking device, the platform 300, the support frame 600 and the two connecting rod assemblies 400 can be assembled into a whole first, and then installed on the chassis 200 through the first hinge seat 210, the second hinge seat 220, the fifth hinge seat 240 and the sixth hinge seat 250, which is convenient for disassembly, assembly and maintenance of the jacking device as a whole.

[0058] Among them, the support frame 600 also includes a third support rod 630 and a fourth support rod 640, the two ends of the third support rod 630 are respectively connected to the fourth link 440 in the two connecting rod assemblies 400, and the two ends of the fourth support rod 640 are respectively connected to the fifth link 450 in the two connecting rod assemblies 400; the third hinge seat 310 is provided with a first through hole 311 and a second through hole 312 at intervals in the third direction Z, and the fourth hinge seat 320 is provided with a third through hole 321 and a fourth through hole 322 at intervals in the third direction Z, the third support rod 630 is passed through the first through hole 311 and the second through hole 312, and the fourth support rod 640 is passed through the third through hole 321 and the fourth through hole 322 to realize the hinge between the platform 300 and the two connecting rod assemblies 400.

[0059] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", and "outside" are based on the orientation or positional relationship described in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application.

[0060] The above disclosure is only a preferred embodiment of the present application, and certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present application are still within the scope covered by the present application.

Claims

1. A lifting device, characterized in that: include: A chassis, wherein a first hinge seat and a second hinge seat are provided on the chassis; A platform is spaced apart from the chassis along a first direction, and a third hinge seat and a fourth hinge seat are provided on the platform; a connecting rod assembly, wherein a first end of the connecting rod assembly is hinged to the first hinge seat and the third hinge seat, and a second end of the connecting rod assembly is hinged to the second hinge seat and the fourth hinge seat; A driving component is connected to the middle portion of the connecting rod assembly, the middle portion of the connecting rod assembly is located between the first end and the second end of the connecting rod assembly, and the driving component drives the connecting rod assembly to move in a second direction to adjust the distance between the chassis and the platform in the first direction, and the second direction is different from the first direction.

2. The lifting device according to claim 1, characterized in that: The connecting rod assembly includes a first connecting rod, a second connecting rod and a third connecting rod, wherein the first end of the first connecting rod is hinged to the first hinge seat, the first end of the second connecting rod is hinged to the second hinge seat, the first end of the third connecting rod is hinged to the second end of the first connecting rod and the third hinge seat, and the second end of the third connecting rod is hinged to the second end of the second connecting rod and the fourth hinge seat; The driving component is connected to the middle portion of the third connecting rod, and the middle portion of the third connecting rod is located between the first end and the second end of the third connecting rod. The driving component drives the third connecting rod to move in the second direction.

3. The lifting device according to claim 2, characterized in that: The driving component includes a driving body, a rotating shaft and a crank. The driving body drives the rotating shaft to rotate. The first end of the crank is fixed to the rotating shaft, and the second end of the crank is connected to the middle part of the third connecting rod.

4. The lifting device according to claim 3, characterized in that: The rotation axis extends along a third direction, and the third direction is perpendicular to the first direction.

5. The lifting device according to claim 3, characterized in that: A guide groove extending along the length direction of the third connecting rod is provided in the middle portion of the third connecting rod, and a first roller is provided on the second end of the crank, and the first roller is arranged in the guide groove.

6. The lifting device according to claim 5, characterized in that: The guide groove includes a limiting groove wall and an opening, and the limiting groove wall and the opening are respectively arranged at two ends of the guide groove along the length direction of the third connecting rod.

7. The lifting device according to claim 2, characterized in that: The connecting rod assembly also includes a fourth connecting rod and a fifth connecting rod, the first end of the fourth connecting rod is hinged to the first end of the third connecting rod, the second end of the fourth connecting rod is hinged to the third articulated seat, the first end of the fifth connecting rod is hinged to the second end of the third connecting rod, and the second end of the fifth connecting rod is hinged to the fourth articulated seat.

8. The lifting device according to claim 1 or 7, characterized in that: A second roller is provided on one of the chassis and the platform, and a guide rail is provided on the other of the chassis and the platform. The guide rail extends along the first direction, and the second roller is provided in the guide rail.

9. The lifting device according to claim 1, characterized in that: The lifting device also includes a support frame, two connecting rod assemblies are provided, the two connecting rod assemblies are arranged at intervals, the support frame is connected between the two connecting rod assemblies, and the driving component is connected to at least one of the connecting rod assemblies.

10. The lifting device according to claim 9, characterized in that: The chassis is further provided with a fifth hinge seat and a sixth hinge seat, the support frame includes a first support rod and a second support rod, each of the connecting rod assemblies includes a first connecting rod, a second connecting rod and a third connecting rod, and in one of the two connecting rod assemblies, The first end of the first connecting rod is hinged to the first hinge seat, the first end of the second connecting rod is hinged to the second hinge seat, the first end of the third connecting rod is hinged to the second end of the first connecting rod and the first end of the first support rod, and the second end of the third connecting rod is hinged to the second end of the second connecting rod and the first end of the second support rod; In the other of the two connecting rod assemblies, The first end of the first connecting rod is hinged to the fifth hinge seat, the first end of the second connecting rod is hinged to the sixth hinge seat, the first end of the third connecting rod is hinged to the second end of the first connecting rod and the second end of the first support rod, and the second end of the third connecting rod is hinged to the second end of the second connecting rod and the second end of the second support rod; The driving component is connected to the middle portion of one of the third connecting rods.

11. A vehicle, characterized in that: It comprises a driving wheel and a jacking device according to any one of claims 1 to 10, wherein the driving wheel is rotatably connected to the chassis.

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