A bidirectional clamping fixing clamp for a battery

Abstract

The application provides a bidirectional clamping fixing clamp for a battery, which comprises a clamp and a self-locking mechanism, wherein the self-locking mechanism is arranged on the clamp, the clamp comprises a base, a first clamping hand and a second clamping hand, the first clamping hand and the second clamping hand are movably arranged on the base through the self-locking mechanism, and the first clamping hand and the second clamping hand are arranged in a stacked mode; the self-locking mechanism comprises a self-locking cylinder, a wedge-shaped cam, a first follower device and a second follower device, the self-locking cylinder is arranged at both ends of one side of the base, the first follower device and the second follower device are arranged on the other side of the base, a piston rod of the self-locking cylinder extends to the other side of the base and is connected with the wedge-shaped cam, and the wedge-shaped cam is located between the first follower device and the second follower device; the wedge-shaped cam is used for realizing bidirectional synchronous movement and self-locking of the clamp, and realizing clamping and loosening of a soft package battery pressing machine electric clamp.

Description

Technical Field

[0001] This invention relates to the field of soft-pack battery clamp technology, and more specifically to a bidirectional clamping fixture for batteries. Background Technology

[0002] Lithium batteries have advantages such as high operating voltage, small size, no memory effect and long life, and are widely used in communication products, automotive power batteries and other fields. In the production process of lithium batteries, the formation process is to activate the positive and negative electrode chemicals in the battery through charge and discharge tests, improve its charging performance and discharge efficiency during use, and make the lithium battery electrochemical, that is, the activation process of lithium battery materials.

[0003] During the charge and discharge test of a lithium battery, the test probe releases a constant current into the battery. At this time, the electrolyte inside the lithium battery undergoes a chemical reaction under the influence of the current, thereby generating heat. The battery casing on the outer surface expands under the influence of the internal chemical reaction.

[0004] Chinese patent application No. 202310243726.7, published on July 14, 2023, discloses a soft-pack restraint tray with water circulation temperature control. The restraint tray body includes a U-shaped frame, a clamping mechanism, and a transmission mechanism. This structure uses the transmission mechanism to push the pressure plate to move in a single direction to achieve clamping of the battery by the clamping plate (electric clamp). However, the unidirectional drive cannot guarantee that all the electric clamps are in the same state. Some may be loose and some may still be clamped. As a result, when the battery is removed, there may be a problem of scratching the tabs. Summary of the Invention

[0005] The purpose of this invention is to provide a bidirectional clamping fixture for batteries, which uses a wedge cam to achieve bidirectional synchronous movement and self-locking of the fixture, thereby enabling the clamping and loosening of the soft-pack battery press clamp, so that all batteries can maintain the same clamping or loosening state.

[0006] To achieve the above objective, a bidirectional clamping fixture for batteries includes a clamp and a self-locking mechanism. The self-locking mechanism is disposed on the clamp. The clamp includes a base, a first gripper, and a second gripper. The first gripper and the second gripper are movably disposed on the base via the self-locking mechanism, and the first gripper and the second gripper are stacked vertically.

[0007] The self-locking mechanism includes a self-locking cylinder, a wedge-shaped cam, a first follower wheel device, and a second follower wheel device. The self-locking cylinder is located at both ends on one side of the base, and the first follower wheel device and the second follower wheel device are located on the other side of the base. The piston rod of the self-locking cylinder extends to the other side of the base and is connected to the wedge-shaped cam. The wedge-shaped cam is located between the first follower wheel device and the second follower wheel device.

[0008] The first gripper is connected to a first follower wheel device at both ends, and the second gripper is connected to a second follower wheel device at both ends. The first follower wheel device drives the first gripper to move along the length of the base, and the second follower wheel device drives the second gripper to move along the length of the base. The first gripper and the second gripper move in opposite directions. The self-locking cylinders located at both ends of the base synchronously drive the wedge cam to extend or retract, driving the first follower wheel device and the second follower wheel device to move.

[0009] The above structure, by setting a first follower wheel device and a second follower wheel device, with the first follower wheel device driving the first gripper to move along the length of the base from one end of the base to the other end, and the second follower wheel device driving the second gripper to move in the opposite direction from the first gripper to one end of the base, thereby clamping the battery by the alternating movement of the first and second grippers. At the same time, by setting a wedge cam, the first and second follower wheels are driven to move in opposite directions in a bidirectional manner, thereby achieving the clamping of the battery by the first and second grippers, and the squeezing action of the wedge cam makes the first and second grippers less likely to loosen, making the self-locking structure simple and stable.

[0010] Furthermore, the first follower wheel device includes a first drive wheel, a first follower wheel, a first drive assembly, and a first follower assembly. The first drive assembly is movably disposed at one end of the base, and the first drive wheel is mounted on the first drive assembly. The first follower assembly is movably disposed at the other end of the base, and the first follower wheel is mounted on the first follower assembly. One end of the first gripper is mounted on the first drive assembly, and the other end of the first gripper is mounted on the first follower assembly. This configuration, with the first follower wheel device movably disposed on the base, ensures that the wedge cam can push the first gripper to move. Through synchronous clamping, all batteries can be kept in the same clamped or released state.

[0011] Furthermore, the second follower wheel device includes a second drive wheel, a second follower wheel, a second drive assembly, and a second follower assembly. The second follower assembly is movably disposed at one end of the base and at a position corresponding to the first drive assembly. The second follower wheel is disposed on the second follower assembly, and the first drive wheel and the second follower wheel correspond to each other. The first drive assembly drives the first drive wheel to move towards the second follower wheel. A wedge-shaped cam located at one end of the base is positioned between the first drive wheel and the second follower wheel, and the wedge-shaped cam presses against the first drive wheel and the second follower wheel. One end of the second gripper is disposed on the second drive assembly, and the other end of the second gripper is disposed on the second follower assembly. This configuration, by movably disposing of the second follower wheel device on the base, ensures that the wedge-shaped cam pressing against the first drive wheel and the second follower wheel can drive the first gripper and the second gripper to move.

[0012] Furthermore, the second drive assembly is movably disposed at the other end of the base and at a position corresponding to the first follower assembly. A second drive wheel is provided on the second drive assembly, corresponding to the first follower wheel. The second drive assembly drives the second drive wheel to move towards the first follower wheel. A wedge-shaped cam located at the other end of the base is positioned between the second drive wheel and the first follower wheel, and the wedge-shaped cam presses against the second drive wheel and the first follower wheel. With this configuration, the first gripper and the second gripper can be moved by the wedge-shaped cam pressing against the second drive wheel and the first follower wheel.

[0013] Furthermore, the first drive assembly includes a first drive cylinder, a first drive slider, a first drive guide rail, and a first drive connecting plate. The first drive guide rail is disposed on one end of the base, and the first drive slider is slidably disposed on the first drive guide rail. The first drive connecting plate is disposed on the first drive slider, and the first drive cylinder is disposed on the base at one end of the first drive connecting plate. The piston rod of the first drive cylinder is connected to one end of the first drive connecting plate, and the first drive wheel is rotatably disposed on the other end of the first drive connecting plate via a first drive wheel shaft. One end of the first gripper is disposed on the first drive connecting plate. Thus, by configuring the first drive assembly, when the wedge cam retracts, the first drive cylinder drives the first drive slider to move the first drive wheel, thereby driving the first gripper to move from the other end of the base to one end of the base, thereby causing the first gripper to disengage from the second gripper, thus releasing the battery.

[0014] Furthermore, the first follower assembly includes a first follower guide rail, a first follower slider, and a first follower connecting plate. The first follower guide rail is disposed at the other end of the base, the first follower slider is slidably disposed on the first follower guide rail, the first follower connecting plate is disposed on the first follower slider, a first follower wheel is rotatably disposed at one end of the first follower connecting plate via a first follower wheel shaft, and the other end of the first gripper is disposed on the first follower connecting plate. The first follower assembly facilitates the movement of the first gripper.

[0015] Furthermore, the second drive assembly includes a second drive cylinder, a second drive slider, a second drive guide rail, and a second drive connecting plate. The second drive guide rail is located at the other end of the base, and the second drive slider is slidably mounted on the second drive guide rail. The second drive connecting plate is located on the second drive slider. A second drive wheel, rotatable via a second drive wheel shaft, is located at the end of the second drive connecting plate near the first follower wheel. A wedge-shaped cam is located between the first drive wheel and the second follower wheel. A second drive cylinder is located on the base at the end of the second drive connecting plate away from the first follower wheel. The piston rod of the second drive cylinder is connected to the second drive connecting plate, and one end of the second gripper is located on the second drive connecting plate. Thus, by configuring the second drive assembly, when the wedge-shaped cam retracts, the second drive cylinder drives the second drive slider to move the second drive wheel, thereby driving the second gripper to move from one end of the base to the other end, causing the second gripper to disengage from the first gripper, thereby releasing the battery.

[0016] Furthermore, the second follower assembly includes a second follower guide rail, a second follower slider, and a second follower connecting plate. The second follower guide rail is disposed at one end of the base, and the second follower slider is slidably disposed on the second follower guide rail. The second follower connecting plate is disposed on the second follower slider, and a second follower wheel, rotatable via a second follower wheel shaft, is disposed at one end of the second follower connecting plate near the first drive wheel. The second follower wheel is positioned close to the first drive wheel, and a wedge-shaped cam is disposed between the second follower wheel and the first drive wheel. The other end of the second gripper is disposed on the second follower connecting plate. This second follower assembly facilitates the movement of the second gripper.

[0017] Furthermore, the front end of the wedge-shaped cam is provided with an inclined surface extending outward and backward from the center of the wedge-shaped cam, and the first follower wheel device and the second follower wheel device roll and fit against the inclined surface. This configuration allows the first and second follower wheel devices to roll and move laterally along the inclined surface while the wedge-shaped cam extends, resulting in a simple and effective structure.

[0018] Furthermore, the first gripper is provided with one or more first clamping pieces, and the second gripper is provided with one or more second clamping pieces. The first clamping pieces and the second clamping pieces are arranged opposite to each other to form a clamping space for the battery. The first gripper and the second gripper move in opposite directions to bring the first clamping pieces and the second clamping pieces closer to each other, thereby clamping the battery. The structure is simple and effective. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is an exploded view of the present invention.

[0021] Figure 3 This is a top view of the present invention.

[0022] Figure 4 for Figure 2 Enlarged view of point A in the middle.

[0023] Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0024] Figure 6 for Figure 3 A magnified view of point C in the middle. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1-6 As shown, a bidirectional clamping fixture for batteries includes a clamp and a self-locking mechanism. The self-locking mechanism 1 is disposed on the clamp 2. The clamp 2 includes a base 21, a first clamp 22 and a second clamp 23. The first clamp 22 and the second clamp 23 are movably disposed on the base 21 through the self-locking mechanism 1, and the first clamp 22 and the second clamp 23 are stacked vertically.

[0027] The self-locking mechanism 1 includes a self-locking cylinder 11, a wedge-shaped cam 12, a first follower wheel device 3, and a second follower wheel device 4. The self-locking cylinder 11 is located at both ends on one side of the base 2, and the first follower wheel device 3 and the second follower wheel device 4 are located on the other side of the base 2. The piston rod of the self-locking cylinder 11 extends to the other side of the base 2 and is connected to the wedge-shaped cam 12. The wedge-shaped cam 12 is located between the first follower wheel device 3 and the second follower wheel device 4.

[0028] like Figures 1-2As shown, the first gripper 22 is connected to a first follower wheel device 3 at both ends, and the second gripper 23 is connected to a second follower wheel device 4 at both ends. The first follower wheel device 3 drives the first gripper 22 to move along the length direction of the base, and the second follower wheel device 4 drives the second gripper 23 to move along the length direction of the base. The first gripper 22 and the second gripper 23 move in opposite directions. The self-locking cylinders located at both ends of the base synchronously drive the wedge-shaped cam to extend or retract, driving the first follower wheel device and the second follower wheel device to move. In this embodiment, the first gripper 22 is provided with one or more first clamping pieces 221, and the second gripper 23 is provided with one or more second clamping pieces 231 corresponding to the first clamping pieces 221. A battery clamping space (not shown in the figure) is formed between the first clamping pieces 221 and the second clamping pieces 231. The first gripper 22 and the second gripper 23 move in opposite directions, causing the first clamping pieces 221 and the second clamping pieces 231 to move closer to each other, thereby achieving battery clamping.

[0029] like Figures 2-5 As shown, the first follower wheel device 3 includes a first drive wheel 31, a first follower wheel 32, a first drive assembly 33, and a first follower assembly 34. The first drive assembly 33 is movably disposed at one end of the base 2, and the first drive wheel 31 is mounted on the first drive assembly 33. The first follower assembly 34 is movably disposed at the other end of the base 2, and the first follower wheel 32 is mounted on the first follower assembly 34. One end of the first gripper 22 is mounted on the first drive assembly 33, and the other end of the first gripper 22 is mounted on the first follower assembly 34. With this configuration, the first follower wheel device 32, movably mounted on the base 2, ensures that the wedge cam 12 can push the first gripper 22 to move.

[0030] like Figures 2-5 As shown, the second follower wheel device 4 includes a second drive wheel 41, a second follower wheel 42, a second drive assembly 43, and a second follower assembly 44. The second follower assembly 44 is movably disposed at one end of the base 2 and at a position corresponding to the first drive assembly 33. The second follower wheel 42 is provided on the second follower assembly 44, and the first drive wheel 31 and the second follower wheel 42 correspond to each other. The first drive assembly 33 drives the first drive wheel 31 to move towards the second follower wheel 42. A wedge-shaped cam 12 located at one end of the base is positioned between the first drive wheel 31 and the second follower wheel 42, and the wedge-shaped cam 12 is configured to press against the first drive wheel 31 and the second follower wheel 42. One end of the second gripper 23 is disposed on the second drive assembly 43, and the other end of the second gripper 23 is disposed on the second follower assembly 44. With this configuration, by movably disposing of the second follower wheel device 4 on the base 21, it is ensured that the wedge-shaped cam 12 pressing against the first drive wheel 31 and the second follower wheel 42 can drive the first gripper 22 and the second gripper 23 to move.

[0031] like Figures 2-5 As shown, the second drive assembly 43 is movably disposed at the other end of the base 2, corresponding to the first follower assembly 34. A second drive wheel 41 is provided on the second drive assembly 43, corresponding to the first follower wheel 32. The second drive assembly 43 drives the second drive wheel 41 to move towards the first follower wheel 32. A wedge-shaped cam 12 located at the other end of the base 2 is positioned between the second drive wheel 41 and the first follower wheel 32, and the wedge-shaped cam 12 presses against the second drive wheel 41 and the first follower wheel 32. With this configuration, the first gripper 22 and the second gripper 23 can be moved by the wedge-shaped cam 12 pressing against the second drive wheel 41 and the first follower wheel 32.

[0032] like Figures 2-4 As shown, the first drive assembly 33 includes a first drive cylinder 331, a first drive slider 332, a first drive guide rail 333, and a first drive connecting plate 334. The first drive guide rail 333 is disposed on one end of the base 2. The first drive slider 332 is slidably disposed on the first drive guide rail 333. The first drive connecting plate 334 is disposed on the first drive slider 332. The first drive cylinder 331 is disposed on the base 2 at one end of the first drive connecting plate 334. The piston rod of the first drive cylinder 331 is connected to one end of the first drive connecting plate 334. The first drive wheel 31 is rotatably disposed on the other end of the first drive connecting plate 334 through the first drive wheel shaft 311. One end of the first gripper 22 is disposed on the first drive connecting plate 334. With this configuration, by setting the first drive assembly 33, when the wedge cam 12 retracts, the first drive cylinder 331 drives the first drive slider 332 to move the first drive wheel 31, thereby driving the first gripper 22 to move from the other end of the base 2 to one end of the base 2, thereby causing the first gripper 22 to leave the second gripper 23, thus releasing the battery.

[0033] like Figures 2-5 As shown, the first follower assembly 34 includes a first follower guide rail 341, a first follower slider 342, and a first follower connecting plate 343. The first follower guide rail 341 is disposed at the other end of the base 2. The first follower slider 342 is slidably disposed on the first follower guide rail 341. The first follower connecting plate 343 is disposed on the first follower slider 342. The first follower wheel 32 is rotatably disposed at one end of the first follower connecting plate 343 via the first follower wheel shaft 321. The other end of the first gripper 22 is disposed on the first follower connecting plate 343. The first follower assembly 34 facilitates the movement of the first gripper 22.

[0034] like Figures 2-5As shown, the second drive assembly 43 includes a second drive cylinder 431, a second drive slider 432, a second drive guide rail 433, and a second drive connecting plate 434. The second drive guide rail 433 is disposed at the other end of the base 2. The second drive slider 432 is slidably disposed on the second drive guide rail 433. The second drive connecting plate 434 is disposed on the second drive slider 432. The second drive wheel 41 is rotatably disposed on the second drive connecting plate 434 near the first follower wheel 32 via the second drive wheel shaft 411. The second drive wheel 41 is disposed near the first follower wheel 32. A wedge-shaped cam 12 is disposed between the first drive wheel 41 and the second follower wheel 32. The second drive cylinder 431 is disposed on the base 2 at the end of the second drive connecting plate 434 away from the first follower wheel 32. The piston rod of the second drive cylinder 431 is connected to the second drive connecting plate 434. One end of the second gripper 23 is disposed on the second drive connecting plate 434. With this configuration, by setting the second drive assembly 43, when the wedge cam 12 retracts, the second drive cylinder 431 drives the second drive slider 432 to move the second drive wheel 41, thereby driving the second gripper 23 to move from one end of the base 2 to the other end of the base 2, thereby causing the second gripper 23 to leave the first gripper 22, thus releasing the battery.

[0035] like Figures 2-4 As shown, the second follower assembly 44 includes a second follower guide rail 441, a second follower slider 442, and a second follower connecting plate 443. The second follower guide rail 441 is disposed at one end of the base 2. The second follower slider 442 is slidably disposed on the second follower guide rail 441. The second follower connecting plate 443 is disposed on the second follower slider 442. The second follower wheel 42 is rotatably disposed on the second follower connecting plate 443 near the first drive wheel 31 via a second follower wheel shaft 421. The second follower wheel 42 is disposed close to the first drive wheel 31. A wedge-shaped cam 12 is disposed between the second follower wheel 42 and the first drive wheel 31. The other end of the second gripper 23 is disposed on the second follower connecting plate 443. The second follower assembly 44 facilitates the movement of the second gripper 23.

[0036] like Figure 6 As shown, the front end of the wedge cam 12 is provided with an inclined surface 121 extending outward and backward from the center of the wedge cam 12. The first drive wheel 31 and the second follower wheel 424 roll and fit against the inclined surface 121. With this configuration, the inclined surface allows the first and second follower wheel devices to roll and move laterally along the inclined surface when the wedge cam extends, resulting in a simple and effective structure.

[0037] The working principle of this invention is as follows: By setting a first follower wheel device 3 and a second follower wheel device 4, the first follower wheel device 3 drives the first gripper 22 to move along the length of the base 2 from one end of the base 2 to the other end of the base 2, while the second follower wheel device 4 drives the second gripper 23 to move in the opposite direction of the first gripper 22 from the other end of the base 2 to one end of the base 2. Thus, the battery can be clamped by the staggered movement of the first gripper 22 and the second gripper 23. At the same time, by setting a wedge cam 12, the first follower wheel device 3 and the second follower wheel device 4 are driven to move in opposite directions in a bidirectional manner, thereby achieving the clamping of the battery by the first gripper 22 and the second gripper 23. The squeezing action of the wedge cam 12 makes it difficult for the first gripper 22 and the second gripper 23 to loosen, making the self-locking structure simple and stable. Through the synchronous clamping action, all batteries can be kept in the same clamped or loose state.

Claims

1. A bidirectional clamping fixture for batteries, comprising a clamp and a self-locking mechanism, wherein the self-locking mechanism is disposed on the clamp, characterized in that: The clamp includes a base, a first clamp and a second clamp. The first clamp and the second clamp are movably mounted on the base via a self-locking mechanism, and the first clamp and the second clamp are stacked one on top of the other. The self-locking mechanism includes a self-locking cylinder, a wedge-shaped cam, a first follower wheel device, and a second follower wheel device. The self-locking cylinder is located at both ends on one side of the base, and the first follower wheel device and the second follower wheel device are located on the other side of the base. The piston rod of the self-locking cylinder extends to the other side of the base and is connected to the wedge-shaped cam. The wedge-shaped cam is located between the first follower wheel device and the second follower wheel device. The first gripper is connected to a first follower wheel device at both ends, and the second gripper is connected to a second follower wheel device at both ends. The first follower wheel device drives the first gripper to move along the length of the base, and the second follower wheel device drives the second gripper to move along the length of the base. The first gripper and the second gripper move in opposite directions. The self-locking cylinders located at both ends of the base synchronously drive the wedge cam to extend or retract, driving the first follower wheel device and the second follower wheel device to move.

2. The battery bidirectional clamping fixture according to claim 1, characterized in that: The first follower wheel device includes a first drive wheel, a first follower wheel, a first drive assembly, and a first follower assembly. The first drive assembly is movably disposed at one end of the base, and the first drive wheel is disposed on the first drive assembly. The first follower assembly is movably disposed at the other end of the base, and the first follower wheel is disposed on the first follower assembly. One end of the first gripper is disposed on the first drive assembly, and the other end of the first gripper is disposed on the first follower assembly.

3. A bidirectional clamping fixture for batteries according to claim 2, characterized in that: The second follower wheel device includes a second drive wheel, a second follower wheel, a second drive assembly, and a second follower assembly. The second follower assembly is movably disposed at one end of the base and at a position corresponding to the first drive assembly. The second follower wheel is disposed on the second follower assembly. The first drive wheel and the second follower wheel correspond to each other. The first drive assembly drives the first drive wheel to move toward the second follower wheel. A wedge-shaped cam located at one end of the base is positioned between the first drive wheel and the second follower wheel and is configured to press against the first drive wheel and the second follower wheel. One end of the second gripper is disposed on the second drive assembly, and the other end of the second gripper is disposed on the second follower assembly.

4. A bidirectional clamping fixture for batteries according to claim 3, characterized in that: The second drive assembly is movably disposed at the other end of the base and at a position corresponding to the first follower assembly. A second drive wheel is provided on the second drive assembly, and the second drive wheel and the first follower wheel correspond to each other. The second drive assembly drives the second drive wheel to move in the direction of the first follower wheel. A wedge-shaped cam located at the other end of the base is located between the second drive wheel and the first follower wheel, and the wedge-shaped cam presses against the second drive wheel and the first follower wheel.

5. A bidirectional clamping fixture for batteries according to claim 3, characterized in that: The first drive assembly includes a first drive cylinder, a first drive slider, a first drive guide rail, and a first drive connecting plate. The first drive guide rail is disposed on one end of the base, the first drive slider is slidably disposed on the first drive guide rail, the first drive connecting plate is disposed on the first drive slider, the first drive cylinder is disposed on the base at one end of the first drive connecting plate, the piston rod of the first drive cylinder is connected to one end of the first drive connecting plate, the first drive wheel is rotatably disposed on the other end of the first drive connecting plate through the first drive wheel shaft, and one end of the first gripper is disposed on the first drive connecting plate.

6. A bidirectional clamping fixture for batteries according to claim 4, characterized in that: The first follower component includes a first follower guide rail, a first follower slider, and a first follower connecting plate. The first follower guide rail is disposed at the other end of the base. The first follower slider is slidably disposed on the first follower guide rail. The first follower connecting plate is disposed on the first follower slider. The first follower wheel is rotatably disposed at one end of the first follower connecting plate via the first follower wheel shaft. The other end of the first gripper is disposed on the first follower connecting plate.

7. A bidirectional clamping fixture for batteries according to claim 6, characterized in that: The second drive assembly includes a second drive cylinder, a second drive slider, a second drive guide rail, and a second drive connecting plate. The second drive guide rail is disposed at the other end of the base. The second drive slider is slidably disposed on the second drive guide rail. The second drive connecting plate is disposed on the second drive slider. The second drive wheel is rotatably disposed on the second drive connecting plate at the end near the first follower wheel via the second drive wheel shaft. The second drive wheel is disposed close to the first follower wheel. A wedge-shaped cam is disposed between the first drive wheel and the second follower wheel. The second drive cylinder is disposed on the base at the end of the second drive connecting plate away from the first follower wheel. The piston rod of the second drive cylinder is connected to the second drive connecting plate. One end of the second gripper is disposed on the second drive connecting plate.

8. A bidirectional clamping fixture for batteries according to claim 5, characterized in that: The second follower assembly includes a second follower guide rail, a second follower slider, and a second follower connecting plate. The second follower guide rail is disposed at one end of the base. The second follower slider is slidably disposed on the second follower guide rail. The second follower connecting plate is disposed on the second follower slider. The second follower wheel is rotatably disposed at one end of the second follower connecting plate near the first drive wheel via a second follower wheel shaft. The second follower wheel is disposed close to the first drive wheel. A wedge-shaped cam is disposed between the second follower wheel and the first drive wheel. The other end of the second gripper is disposed on the second follower connecting plate.

9. A bidirectional clamping fixture for batteries according to claim 1, characterized in that: The front end of the wedge-shaped cam is provided with an inclined surface extending outward and backward from the center of the wedge-shaped cam, and the first follower wheel device and the second follower wheel device roll and fit against the inclined surface.

10. A bidirectional clamping fixture for batteries according to claim 1, characterized in that: The first clamping hand is provided with one or more first clamping pieces, and the second clamping hand is provided with one or more second clamping pieces. The first clamping pieces and the second clamping pieces are arranged opposite each other to form a clamping space for the battery.

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