Clamping arm assembly

Abstract

The utility model discloses a clamping arm assembly. The clamping arm assembly comprises a frame, two clamping arm mechanisms and a wheel base adjusting mechanism. The two clamping arm mechanisms are installed on the frame, and at least one clamping arm mechanism can move relative to the frame in the length direction of the frame so as to adapt to different automobile wheelbases; the wheel base adjusting mechanism corresponds to at least one of the two clamping arm mechanisms and is used for controlling the corresponding clamping arm mechanism to move on the frame, the wheel base adjusting mechanism comprises a chain, a driving chain wheel and a first rotating driving part, and the chain extends in the length direction of the frame and is connected with the frame; and the driving chain wheel is meshed with the chain and is in transmission connection with the first rotary driving piece. By means of the structure of the clamping arm mechanism, the clamping arm assembly can be suitable for carrying vehicles with different wheelbases, the carrying efficiency during vehicle carrying is improved, the movement of the clamping arm mechanism is achieved through the structure of the vehicle frame, and the effect of reducing the manufacturing cost is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of automotive handling technology, and in particular relates to a clamping arm assembly. Background Technology

[0002] With the advent of intelligent manufacturing and Industry 4.0, automated material handling systems have become an indispensable and important component of modern manufacturing. AGVs (Automated Guided Vehicles), with their high efficiency, flexibility, and intelligence, are playing an increasingly important role in intelligent parking garages, material handling, and production line integration. Among the many functional components of an AGV, the gripper arm, as a key component directly involved in vehicle handling and cargo gripping, directly affects the AGV's working efficiency and flexibility. Currently, most AGVs on the market are designed to work with vehicle transporters to handle vehicles of different wheelbases. These vehicle transporters rely on tracks for movement, which limits the AGV's adaptability and flexibility and increases costs. Utility Model Content

[0003] In view of this, it is necessary to provide a clamping arm assembly with a wheelbase adjustment function.

[0004] A clamping arm assembly, the clamping arm assembly comprising:

[0005] Two clamping arm mechanisms are mounted on the frame of the car transporter, and at least one of the clamping arm mechanisms is capable of moving relative to the frame along the length direction of the frame in order to adapt to different car wheelbases;

[0006] A wheelbase adjustment mechanism, corresponding to at least one of the two clamping arm mechanisms, is used to control the movement of the corresponding clamping arm mechanism on the frame. The wheelbase adjustment mechanism includes a chain, a drive sprocket, and a first rotary drive member. The chain extends along the length direction of the frame and is connected to the frame. The drive sprocket meshes with the chain and is connected to the first rotary drive member for transmission.

[0007] Understandably, by utilizing the meshing between the drive sprocket and the chain on the frame, the action and reaction forces between the drive sprocket and the chain are used to achieve the movement of the clamping arm mechanism on the frame, and to achieve the purpose of adjusting the distance between the two clamping arm mechanisms. This allows the distance between the two clamping arm mechanisms on the clamping arm assembly to be adaptively adjusted according to the vehicle's wheelbase when the clamping arm assembly enters the bottom of the vehicle. In this way, the clamping arm assembly is not only suitable for handling vehicles with different wheelbases and improving the handling efficiency, but also reduces manufacturing costs by using the frame's own structure to realize the movement of the clamping arm mechanism.

[0008] In one embodiment, the wheelbase adjustment mechanism further includes an idler sprocket, which is disposed on one side of the drive sprocket and engages with the chain to tension the chain.

[0009] It is understandable that using an idler sprocket to tension the chain ensures the stability of the meshing between the drive sprocket and the chain, thus meeting the usage requirements of the clamping arm mechanism moving on the frame.

[0010] In one embodiment, the number of chains is configured to be multiple, and the multiple chains are arranged at intervals along the width direction of the frame;

[0011] The number of drive sprockets is configured to be multiple, and each drive sprocket corresponds one-to-one with a chain, and the multiple drive sprockets can rotate synchronously.

[0012] Understandably, by using multiple drive sprockets and multiple chains to mesh with each other, the clamping arm mechanism can move on the frame under the drive of multiple drive sprockets. This can improve the stability of the clamping arm mechanism when it moves on the frame and prevent it from tilting during the movement.

[0013] In one embodiment, the number of the first rotary drive members is configured to be one;

[0014] The multiple drive sprockets are connected by a connecting shaft for transmission.

[0015] It is understandable that using a single primary rotary drive to drive multiple drive sprockets simultaneously ensures the synchronization of the rotation of the multiple drive sprockets and reduces costs.

[0016] In one embodiment, the number of drive sprockets is configured to be two, one of which is connected to the connecting shaft via a first coupling;

[0017] The first rotary drive component is connected to a first speed reducer, which is connected to another drive sprocket and the connecting shaft.

[0018] It is understandable that by using the first reducer and the first coupling, the transmission connection between the first rotary drive component and the two drive sprockets can be realized, thus satisfying the usage requirement of one first rotary drive component to control the rotation of two drive sprockets.

[0019] In one embodiment, the first coupling is configured as a universal coupling;

[0020] The connecting shaft is connected to the first reducer via a rigid coupling.

[0021] It is understandable that by utilizing the structural characteristics of the universal coupling, the assembly between the connecting shaft and the corresponding drive sprocket can be adaptively adjusted, which facilitates the assembly between the connecting shaft and the corresponding drive sprocket.

[0022] In one embodiment, the gripper mechanism includes four robotic arms, a second rotary drive and four rack assemblies, with two robotic arms forming a group, and each group of robotic arms being used to grip a car tire.

[0023] Each of the four robotic arms is equipped with an arc-shaped gear; the four rack assemblies correspond one-to-one with the four arc-shaped gears, and the arc-shaped gears can be connected to the second rotary drive component through the corresponding rack assembly.

[0024] Understandably, by utilizing the transmission connection between the arc gear and the rack assembly, the clamping arm mechanism can switch back and forth between the folded state and the working state by rotation, which can reduce the space required for the clamping arm mechanism to be assembled on the frame.

[0025] In one embodiment, the rack assembly includes a rack and a ball screw, the rack being threadedly connected to the ball screw and meshing with a corresponding arc-shaped gear;

[0026] In this configuration, the two ball screws corresponding to each set of robotic arm swing arms are connected by a second coupling for transmission.

[0027] It is understandable that a second coupling is used to achieve the transmission connection between the two ball screws corresponding to each set of robotic arms. This ensures the consistency of the movement of the two racks, thereby ensuring the synchronization of the rotation of the two robotic arms in each set, so as to meet the usage requirements of each set of robotic arms to grip car tires.

[0028] In one embodiment, the number of the second rotary drive members is configured to be one;

[0029] In this configuration, the two opposing ball screws in the two sets of robotic arm swing arms are connected by a synchronous transmission assembly.

[0030] It is understandable that using a synchronous transmission component to realize the transmission connection between the second rotary drive and the two opposing ball screws in the two sets of robotic arms allows each gripper mechanism to use only one second rotary drive to drive the two sets of robotic arms to grip the car tire. This simplifies the structure of the gripper mechanism and reduces costs, while also ensuring the consistency of the movement of the two sets of robotic arms to meet the usage requirements of driving the two sets of robotic arms.

[0031] In one embodiment, the synchronous transmission assembly includes two second reducers and a synchronous transmission shaft. The two second reducers correspond one-to-one with the two ball screws, and the second reducers are connected to the corresponding ball screws in a transmission connection. Furthermore, the two second reducers are connected to each other through the synchronous transmission shaft.

[0032] The second rotary drive component is connected to one of the second reducers in a transmission connection.

[0033] It is understandable that the above-mentioned structure of the second reducer and synchronous transmission shaft realizes the synchronous transmission between the two opposite ball screws in each set of robot arm swing arms, which simplifies the structure of the synchronous transmission assembly.

[0034] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0035] The clamping arm assembly claimed in this application utilizes the meshing between the drive sprocket and the chain on the frame. This allows the clamping arm mechanism to move on the frame using the action and reaction forces between the drive sprocket and the chain, and achieves the purpose of adjusting the distance between the two clamping arm mechanisms. When the clamping arm assembly enters the bottom of the vehicle, the distance between the two clamping arm mechanisms on the clamping arm assembly can be adaptively adjusted according to the vehicle's wheelbase. Thus, the clamping arm assembly is not only suitable for handling vehicles with different wheelbases and improving the handling efficiency, but also reduces manufacturing costs by using the frame's own structure to realize the movement of the clamping arm mechanism. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the clamping arm assembly provided in this application.

[0038] Figure 2 This is a structural schematic diagram of another state of the clamping arm assembly provided in this application.

[0039] Figure 3 This is a schematic diagram of the assembly of the clamping arm mechanism and the wheelbase adjustment mechanism in this application.

[0040] Figure 4This is a structural schematic diagram from another perspective when the clamping arm mechanism and the wheelbase adjustment mechanism are assembled in this application.

[0041] Figure 5 This is a schematic diagram of the clamping arm mechanism in this application.

[0042] Figure 6 This is a schematic diagram of the wheelbase adjustment mechanism in this application.

[0043] Figure 7 This is a partial structural schematic diagram of the wheelbase adjustment mechanism in this application.

[0044] Reference numerals: 100, clamping arm assembly; 10, frame; 11, vehicle body slide rail; 20, clamping arm mechanism; 201, roller; 21, clamping arm mounting base; 211, first trigger plate; 212, second trigger plate; 22, robotic arm swing arm; 221, arc gear; 23, second rotary drive component; 231, motor mounting plate; 24, rack assembly; 241, rack; 242, ball screw; 2421, second coupling; 25, synchronous transmission assembly; 251, second reduction gear. 252. Synchronous drive shaft; 30. Shaft distance adjustment mechanism; 31. Chain; 311. Chain pull rod; 312. Chain pull seat; 32. Drive sprocket; 321. Connecting shaft; 301. First coupling; 302. Rigid coupling; 323. Sprocket mounting seat; 33. First rotary drive component; 331. First reducer; 34. Idler sprocket; 101. First detection sensor; 102. Second detection sensor; 103. Third detection sensor; 40. Controller. Detailed Implementation

[0045] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] It should be noted that when a component is said to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or may have an intervening component.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] The clamping arm assembly claimed in this application specifically refers to a car transporter used in automated parking systems for moving cars.

[0049] like Figures 1 to 7 As shown, an embodiment of this application provides a clamping arm assembly including two clamping arm mechanisms 20 and a wheelbase adjustment mechanism 30. The two clamping arm mechanisms 20 are mounted on the frame 10 of the car transporter. At least one clamping arm mechanism 20 can move relative to the frame 10 along the length direction of the frame 10 to adapt to different car wheelbases. The wheelbase adjustment mechanism 30 corresponds to at least one of the two clamping arm mechanisms 20 and is used to control the movement of the corresponding clamping arm mechanism 20 on the frame 10. The wheelbase adjustment mechanism 30 includes a chain 31, a drive sprocket 32, and a first rotary drive member 33. The chain 31 extends along the length direction of the frame 10 and is connected to the frame 10. Both ends of the chain 31 are connected to the frame 10. The drive sprocket 32 ​​meshes with the chain 31 and is connected to the first rotary drive member 33.

[0050] It is understandable that by utilizing the meshing between the drive sprocket 32 ​​and the chain 31 on the frame 10, the action and reaction forces between the drive sprocket 32 ​​and the chain 31 can be used to realize the movement of the clamping arm mechanism 20 on the frame 10, and achieve the purpose of adjusting the distance between the two clamping arm mechanisms 20. When the clamping arm assembly enters the bottom of the vehicle, the distance between the two clamping arm mechanisms 20 on the clamping arm assembly can be adaptively adjusted according to the wheelbase of the vehicle. In this way, the clamping arm assembly is not only suitable for handling vehicles with different wheelbases and improving the handling efficiency, but also reduces manufacturing costs by using the structure of the frame 10 itself to realize the movement of the clamping arm mechanism 20.

[0051] like Figure 1 , Figure 2 As shown, in one embodiment, the clamping arm assembly of this application has one clamping arm mechanism 20 that moves on the vehicle frame 10. It is understood that in other embodiments, both clamping arm mechanisms 20 are also configured to move on the vehicle frame 10. It should be noted that the specific structure of the clamping arm mechanism 20, and how it clamps the vehicle tire during operation, can adopt conventional methods of existing clamping arm assemblies, and will not be elaborated upon here.

[0052] like Figure 1 , Figure 2 and Figure 5 As shown, in one embodiment, the frame 10 includes a body slide rail 11; wherein, a roller 201 is rotatably connected to the movable clamping arm mechanism 20, the roller 201 is disposed on the body slide rail 11, and the clamping arm mechanism 20 can move on the body slide rail 11 via the roller 201. That is, the clamping arm mechanism 20 can achieve movement by the rolling of the roller 201 on the body slide rail 11, which can reduce the frictional resistance encountered by the clamping arm mechanism 20 when moving on the frame 10, thereby facilitating the adjustment of the distance between the two clamping arm mechanisms 20 in the clamping arm assembly. Here, there are four rollers 201, which are symmetrically arranged in pairs and rotatably connected to the clamping arm mounting base 21 on the clamping arm mechanism 20.

[0053] like Figure 3 , Figure 4 As shown, in one embodiment, the gripper arm mechanism 20 includes four robotic arms 22, a second rotary drive 23, and four rack assemblies 24. Two robotic arms 22 form a group, and each group of robotic arms 22 is used to grip a car tire. Each of the four robotic arms 22 is equipped with an arc-shaped gear 221. The four rack assemblies 24 correspond one-to-one with the four arc-shaped gears 221, and the arc-shaped gears 221 can be connected to the second rotary drive 23 via the corresponding rack assembly 24. That is, the rotation of the robotic arms 22 on the gripper arm mounting base 21 can be achieved through gear and rack meshing. Here, the second rotary drive 23 is configured as a motor, which can be mounted on the gripper arm mounting base 21 of the gripper arm mechanism 20 via a motor mounting plate 231. It is understood that in other embodiments, the second rotary drive 23 can also be a rotary cylinder, a rotary hydraulic cylinder, etc., which will not be elaborated upon here.

[0054] like Figure 3As shown, in one embodiment, the rack assembly 24 includes a rack 241 and a ball screw 242. The rack 241 is threaded to the ball screw 242 and meshes with a corresponding arc gear 221. This threaded connection between the ball screw 242 and the rack 241 allows the ball screw 242 to drive the rack 241 to move axially upwards along its axis when rotating. The meshing between the rack 241 and the corresponding arc gear 221 causes the arc gear 221 mounted on the robotic arm 22 to rotate, thereby driving the robotic arm 22 to rotate. The two ball screws 242 corresponding to each robotic arm 22 are connected by a second coupling 2421. This ensures the consistency of the movement of the two racks 241, thereby ensuring the synchronization of the rotation of the two robotic arms 22 in each set of robotic arms 22, so as to meet the usage requirements of each set of robotic arms 22 to grip the car tire.

[0055] like Figure 3 , Figure 4 As shown, in one embodiment, the number of second rotary drive members 23 is configured to be one; wherein, the two opposing ball screws 242 of the two sets of robotic arm swing arms 22 are connected by a synchronous transmission assembly 25. That is to say, the clamping arm mechanism 20 can use only one second rotary drive member 23 to drive the two sets of robotic arm swing arms 22 to clamp the car tire. This simplifies the structure of the clamping arm mechanism 20 and reduces costs, while also ensuring the consistency of the movement of the two sets of robotic arm swing arms 22 to meet the usage requirements of driving the two sets of robotic arm swing arms 22.

[0056] like Figure 3 , Figure 4 As shown, in one embodiment, the synchronous transmission assembly 25 includes two second reducers 251 and a synchronous transmission shaft 252. Each of the two second reducers 251 corresponds to one of the two ball screws 242, and the second reducers 251 are connected to their respective ball screws 242. Furthermore, the two second reducers 251 are connected to each other via the synchronous transmission shaft 252. In other words, the two ball screws 242 corresponding to the two sets of robotic arms 22 can be connected via two second reducers 251 and a synchronous transmission shaft 252, thus simplifying the structure of the synchronous transmission assembly 25. Here, the second rotary drive 23 is connected to one of the second reducers 251.

[0057] like Figures 1 to 4 , Figure 6As shown, in one embodiment, the chain 31 passes through the corresponding clamping arm mechanism 20. One end of the chain 31 is fixed to the frame 10 by the chain pull rod 311, and the other end of the chain 31 is fixed to the frame 10 by the chain pull seat 312. In this way, the chain 31 can be tensioned and assembled and fixed to the frame 10.

[0058] like Figures 1 to 4 , Figure 6 As shown, in one embodiment, multiple chains 31 are configured, arranged sequentially at intervals along the width direction of the frame 10; correspondingly, multiple drive sprockets 32 are also configured, each corresponding to one of the multiple chains 31, and the multiple drive sprockets 32 can rotate synchronously. This allows the clamping arm mechanism 20 to move on the frame 10 under the drive of the multiple drive sprockets 32, thereby improving the stability of the clamping arm mechanism 20 when moving on the frame 10 and preventing deflection during movement. Here, there are two chains 31. It is understood that in other embodiments, the number of chains 31 may also be three, four, or even more, or the number of chains 31 may be configured as one, which will not be elaborated here.

[0059] like Figure 6 As shown, in one embodiment, the number of first rotary drive members 33 is configured as one; wherein, multiple drive sprockets 32 are connected by a connecting shaft 321. This allows the wheelbase adjustment mechanism 30 to use one first rotary drive member 33 to drive multiple drive sprockets 32 to rotate synchronously, thus ensuring the synchronicity of the rotation of multiple drive sprockets 32 and reducing costs. Here, the first rotary drive member 33 is specifically a drive motor. When there are two drive sprockets 32, one of the drive sprockets 32 is connected to the connecting shaft 321 via a first coupling 301; wherein, a first reducer 331 is connected to the first rotary drive member 33, and the first reducer 331 is connected to the other drive sprocket 32 ​​and the connecting shaft 321 respectively. It can be understood that in other embodiments, the first rotary drive member 33 may also be a rotary cylinder, a rotary hydraulic cylinder, etc. It should be noted that the aforementioned drive sprocket 32 ​​can be mounted on the clamp arm mounting base 21 of the clamp arm mechanism 20 via the sprocket mounting base 323, thereby achieving the assembly connection of the drive sprocket 32 ​​on the clamp arm mechanism 20.

[0060] like Figure 6As shown, in one embodiment, the first coupling 301 is configured as a universal coupling; and the connecting shaft 321 and the first reducer 331 are connected by a rigid coupling 302. This utilizes the structural characteristics of the universal coupling to allow for adaptive adjustment of the assembly between the connecting shaft 321 and the corresponding drive sprocket 32, thus facilitating the assembly between the connecting shaft 321 and the corresponding drive sprocket 32.

[0061] like Figure 7 As shown, in one embodiment, the wheelbase adjustment mechanism 30 further includes an idler sprocket 34. The idler sprocket 34 is disposed on one side of the drive sprocket 32 ​​and meshes with the chain 31 to tension the chain 31. This ensures the stability of the meshing between the drive sprocket 32 ​​and the chain 31, meeting the usage requirements of the clamping arm mechanism 20 moving on the frame 10. Here, each drive sprocket 32 ​​corresponds to two idler sprockets 34, which are disposed on both sides of the corresponding drive sprocket 32 ​​and rotatably connected to the sprocket mounting base 323.

[0062] The clamping arm assembly also includes a detection sensor (not shown) that can detect the position of the clamping arm mechanism 20 on the frame 10 and generate a feedback signal. The feedback signal is used to control the first rotary drive 33 to close so that the clamping arm mechanism 20 stops moving, thus enabling the automation of the adjustment of the distance between the two clamping arm mechanisms 20.

[0063] like Figures 2 to 4 As shown, in one embodiment, the detection sensor includes a first detection sensor 101, which is mounted on the frame 10. When the distance between the two clamping arm mechanisms 20 is at its maximum, the first detection sensor 101 can be triggered by the moving clamping arm mechanism 20 and generate a feedback signal. That is, the clamping arm assembly can achieve automatic control when the distance between the two clamping arm mechanisms 20 is at its maximum. Here, the first detection sensor 101 is configured as a photoelectric switch, micro switch, proximity switch, etc., fixed on the frame 10. Correspondingly, a first trigger plate 211 is mounted on the clamping arm mounting base 21 of the clamping arm mechanism 20, and the clamping arm mechanism 20 can trigger the first detection sensor 101 with the first trigger plate 211.

[0064] like Figure 1 , Figure 4As shown, in one embodiment, the detection sensor includes a second detection sensor 102, which is mounted on the frame 10. When the distance between the two clamping arm mechanisms 20 is at its minimum, the second detection sensor 102 can be triggered by the moving clamping arm mechanism 20 and generate a feedback signal. That is, the clamping arm assembly can achieve automatic control when the distance between the two clamping arm mechanisms 20 is minimized. Here, the second detection sensor 102 is configured as a photoelectric switch, micro switch, proximity switch, etc., fixed on the frame 10. Correspondingly, a second trigger plate 212 is mounted on the clamping arm mounting base 21 of the clamping arm mechanism 20, and the clamping arm mechanism 20 can trigger the second detection sensor 102 with the second trigger plate 212.

[0065] like Figures 1 to 4 As shown, in one embodiment, the detection sensor includes a third detection sensor 103, which is mounted on the moving clamping arm mechanism 20. The third detection sensor 103 can detect the position of the car tire (not shown) and generate a feedback signal. That is, the clamping arm assembly can ensure that the clamping arm mechanism 20 automatically stops when it moves to a position where it can clamp the car tire by detecting when the clamping arm mechanism 20 is aligned with the car tire, so as to meet the usage requirements of the clamping arm mechanism 20 clamping the car tire. Here, the third detection sensor 103 is configured as a photoelectric switch, proximity switch, etc.

[0066] like Figure 1 , Figure 2 The image shows a car transporter, which includes a frame 10, a clamping arm assembly 100, and a controller 40. The controller 40 is electrically connected to a first rotary drive member 33 and is used to control the opening and closing of the first rotary drive member 33. In other words, the clamping arm assembly can be controlled by the controller 40 to move the clamping arm mechanism 20, allowing the clamping arm assembly to adjust the distance between the two clamping arm mechanisms 20 via externally transmitted signals. This satisfies the requirement that when the clamping arm assembly enters the underside of the vehicle, the distance between the two clamping arm mechanisms 20 on the clamping arm assembly can be adaptively adjusted according to the vehicle's wheelbase.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. A clamping arm assembly, characterized in that, The clamp arm assembly (100) includes: Two clamping arm mechanisms (20) are mounted on the frame (10) of the car transporter. At least one of the clamping arm mechanisms (20) is capable of moving relative to the frame (10) along the length direction of the frame (10) to adapt to different car wheelbases. A wheelbase adjustment mechanism (30) is provided, corresponding to at least one of the two clamping arm mechanisms (20), for controlling the movement of the corresponding clamping arm mechanism (20) on the frame (10). The wheelbase adjustment mechanism (30) includes a chain (31), a drive sprocket (32), and a first rotary drive member (33). The chain (31) extends along the length of the frame (10) and is connected to the frame (10). The drive sprocket (32) meshes with the chain (31) and is connected to the first rotary drive member (33) in a transmission connection.

2. The clamping arm assembly according to claim 1, characterized in that, The wheelbase adjustment mechanism (30) also includes an idler sprocket (34), which is located on one side of the drive sprocket (32) and meshes with the chain (31) to tension the chain (31).

3. The clamping arm assembly according to claim 1, characterized in that, The number of chains (31) is configured to be multiple, and the multiple chains (31) are arranged sequentially at intervals along the width direction of the frame (10); The number of drive sprockets (32) is configured to be multiple, and each drive sprocket (32) corresponds to one of the multiple chains (31), and the multiple drive sprockets (32) can rotate synchronously.

4. The clamping arm assembly according to claim 3, characterized in that, The number of the first rotary drive (33) is configured to be one; The multiple drive sprockets (32) are connected by a connecting shaft (321).

5. The clamping arm assembly according to claim 4, characterized in that, The number of drive sprockets (32) is configured to be two, one of which is connected to the connecting shaft (321) via a first coupling (301); The first rotary drive member (33) is connected to a first reducer (331), which is connected to another drive sprocket (32) and the connecting shaft (321).

6. The clamping arm assembly according to claim 5, characterized in that, The first coupling (301) is configured as a universal coupling; The connecting shaft (321) and the first reducer (331) are connected by a rigid coupling (302).

7. The clamping arm assembly according to claim 1, characterized in that, The clamping arm mechanism (20) includes four robotic arms (22), a second rotary drive (23) and four rack assemblies (24). Two robotic arms (22) form a group, and each group of robotic arms (22) is used to clamp car tires. Among them, each of the four robotic arm swing arms (22) is provided with an arc gear (221); the four rack assemblies (24) correspond one-to-one with the four arc gears (221), and the arc gears (221) can be connected to the second rotary drive (23) through the corresponding rack assembly (24).

8. The clamping arm assembly according to claim 7, characterized in that, The rack assembly (24) includes a rack (241) and a ball screw (242). The rack (241) is threaded to the ball screw (242) and meshes with the corresponding arc gear (221). The two ball screws (242) corresponding to each set of robotic arm swing arms (22) are connected by a second coupling (2421).

9. The clamping arm assembly according to claim 8, characterized in that, The number of the second rotary drive (23) is configured to be one; Among them, the two opposing ball screws (242) in the two sets of robotic arm swing arms (22) are connected by a synchronous transmission assembly (25).

10. The clamping arm assembly according to claim 9, characterized in that, The synchronous transmission assembly (25) includes two second reducers (251) and a synchronous transmission shaft (252). The two second reducers (251) correspond one-to-one with the two ball screws (242), and the second reducers (251) are connected to the corresponding ball screws (242) in a transmission connection. Furthermore, the two second reducers (251) are connected to each other through the synchronous transmission shaft (252). The second rotary drive (23) is connected to one of the second reducers (251) in a transmission connection.

Images