Restraining tray tightening device

Abstract

The utility model discloses a restraining tray tightening device which comprises a guide shaft, a deflector rod block and a deflector rod, the guide shaft is used for being connected with a main shaft of a motor, the deflector rod block is connected to the guide shaft, the deflector rod is connected to the deflector rod block in a sliding mode, and the sliding direction of the deflector rod is parallel to the axis direction of the guide shaft. An elastic piece is connected between the driving lever and the driving lever block and used for providing elastic force acting on the driving lever in the axial direction of the driving lever. According to the restraining tray tightening device, the deflector rod of a flexible structure is adopted, a power component (motor) for driving the restraining tray tightening device and a rotating rod for restraining a tray screw can be effectively protected, and the situation that the power component (motor) and the rotating rod are damaged is avoided.

Description

Technical Field

[0001] The utility model relates to the field of battery capacity division and formation equipment, in particular to a restraint tray tightening device. Background Art

[0002] Formation is an indispensable process in the production of lithium batteries, and the pressure stability, negative pressure airtightness and thermal uniformity of the battery during formation are all important factors affecting the battery qualification rate. In the prior art, a restraint tray is used to restrain and pressurize the battery before formation, and then transport it to the formation equipment, relying on the equipment or factory to provide heat to maintain a high-temperature production environment.

[0003] When the restraint tray restrains and pressurizes the battery, after the restraint tray enters the restraint machine and is in place, the restraint machine pushes the restraint tightening device toward the restraint tray. When the power motor of the restraint tightening device drives the lever of the restraint tightening device to rotate, the screw of the restraint tray is driven to rotate. When the screw rotates, it drives the layer plate of the restraint tray to move to restrain and pressurize the battery.

[0004] The existing restraint tightening lever is mainly a metal lever fixed with a thread or an integrally processed metal lever block. The rotating rod on the restraint tray screw is fitted through the gap between the levers, and finally the screw is driven to rotate as the motor rotates to realize the restraint or release of the battery.

[0005] However, both the separate threaded lever and the one-piece metal lever have obvious shortcomings:

[0006] ①. The separate threaded lever is connected to the restraint tightening device through threads. It will become loose after long-term use and needs to be checked and tightened regularly;

[0007] ② Although the one-piece metal lever will not loosen, the processing is cumbersome and wastes materials;

[0008] ③. Both types of restraint levers have the risk of colliding with the rotating rod of the restraint pallet screw. This is mainly because the restraint tightening device cannot ensure that the rotating rod of the restraint pallet screw always stops in the same position when materials are incoming. As a result, the lever and the rotating rod will collide during the advancement of the restraint tightening device. If the number of collisions increases, the rotating rod on the screw will bend and deform, and the power motor and reducer of the restraint tightening device will also be damaged. Utility Model Content

[0009] In order to overcome the deficiencies of the prior art, the utility model provides a restraining pallet tightening device, which adopts a lever with a flexible structure to solve the problem that the rotating rod is deformed and bent and the power motor is damaged after a large number of collisions.

[0010] The technical solution adopted by the utility model to solve its technical problems is:

[0011] A restraint pallet tightening device comprises a guide shaft, a lever block and a lever, wherein the guide shaft is used to be connected to the main shaft of a motor, the lever block is connected to the guide shaft, the lever is slidably connected to the lever block, and the sliding direction of the lever is parallel to the axial direction of the guide shaft, an elastic member is connected between the lever and the lever block, and the elastic member is used to provide an elastic force acting on the lever in the axial direction of the lever.

[0012] As a further improvement of the above technical solution, two of the shifting rods are connected to the shifting rod block, and the two shifting rods are symmetrically arranged based on the axis center of the shifting rod block.

[0013] As a further improvement of the above technical solution, a guide hole is provided on the shifting rod block, and the shifting rod is slidably connected in the guide hole.

[0014] As a further improvement of the above technical solution, the guide hole includes a first guide hole and a second guide hole which are connected to each other, and the diameter of the second guide hole is smaller than the diameter of the first guide hole; the shift rod includes a rod portion and a head portion, the diameter of the head portion is larger than the diameter of the rod portion, the head portion is slidably connected to the first guide hole, and the rod portion is slidably connected to the second guide hole.

[0015] As a further improvement of the above technical solution, one end of the rod away from the head is provided with a conical surface, and the apex of the conical surface is ground flat.

[0016] As a further improvement of the above technical solution, the elastic member includes a compression spring, and the compression spring is connected between the head and the bottom of the first guide hole.

[0017] As a further improvement of the above technical solution, the head is provided with a fixing hole, and one end of the compression spring is connected to the fixing hole.

[0018] As a further improvement of the above technical solution, a ball structure is provided at one end of the lever block away from the guide shaft, and the ball structure is used to reduce the contact area between the lever block and the screw.

[0019] As a further improvement of the above technical solution, the ball structure includes a receiving groove arranged on the lever block, a ball located in the receiving groove, and a ball cover plate covering the receiving groove, the ball cover plate is provided with an opening, a part of the ball extends out of the opening and the ball is in sliding contact with the edge of the opening.

[0020] As a further improvement of the above technical solution, the ball, the lever block and the screw are located on the same axis.

[0021] The beneficial effects of the utility model are:

[0022] In the utility model, an elastic member structure is added between the lever and the lever block, so that when the lever collides with the rotating rod, it will shrink back, and the elastic force of the elastic member plays a buffering role, which can effectively protect the power component (motor) driving the restraining tray tightening device and the rotating rod of the restraining tray screw, and avoid their damage. In addition, the ball structure can reduce the friction between the lever block and the restraining tray screw, thereby increasing the service life of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] Figure 1 It is a schematic diagram of the assembly of the tightening device for restraining a pallet according to an embodiment of the utility model;

[0025] Figure 2 It is a front view of the tightening device for restraining a pallet according to an embodiment of the utility model;

[0026] Figure 3 It is a cross-sectional view of the tightening device for restraining a pallet along the axis of the rotating rod according to an embodiment of the utility model;

[0027] Figure 4 It is a schematic diagram of a ball bearing structure in a tightening device for a restrained tray according to an embodiment of the utility model;

[0028] Figure 5 It is a cross-sectional view of the tightening device for restraining a pallet along the axis of the lever according to an embodiment of the utility model;

[0029] Figure 6 This is a schematic diagram of the utility model embodiment of the restraint tray tightening device Figure 1 ;

[0030] Figure 7 This is a schematic diagram of the utility model embodiment of the restraint tray tightening device Figure 2 .

[0031] Figure numerals: 10, guide shaft; 101, countersunk hole; 11, lever block; 110, first guide hole; 111, second guide hole; 12, lever; 121, head; 122, rod; 123, fixing hole; 13, ball structure; 131, receiving groove; 132, ball; 133, ball cover plate; 14, compression spring; 20, screw; 21, rotating rod. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the utility model, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the fact that according to the specific implementation situation, a better connection structure can be formed by adding or reducing connection accessories. For example, fixed connection / fixed installation can be selected according to the needs of screw connection, bolt connection, pin connection, key connection, bonding, mortise and tenon connection, welding, riveting and other methods. For example, detachable connection can be selected according to the needs of screw connection, bolt connection, threaded connection, snap connection, mortise and tenon connection, Velcro connection and other methods. The various technical features in the creation of the utility model can be combined interactively without conflicting with each other.

[0033] Reference Figure 1-Figure 7 The embodiment of the utility model discloses a restraint tray tightening device, which includes a guide shaft 10, a lever block 11 and a lever 12, wherein the lever block 11 is connected to the guide shaft 10, and the guide shaft 10 is connected to the main shaft of a motor (a motor with a reducer). The restraint tray tightening device moves synchronously with the motor toward the restraint tray until the lever 12 forms a cross-structure cooperation with the rotating rod 21 on the screw 20 in the restraint tray, and then the guide shaft 10 is driven to rotate by the motor, thereby driving the lever 12 on the lever block 11 to rotate. When the lever 12 rotates, it abuts against the rotating rod 21 on the screw 20 in the restraint tray. Under the cooperation of the lever 12 and the rotating rod 21, the screw 20 rotates synchronously with the restraint tray tightening device, and when the screw 20 rotates, it drives the layer plate to move to realize the restraint, pressurization or release of the battery in the restraint tray.

[0034] In this embodiment, two levers 12 are connected to the lever block 11, and the two levers 12 are symmetrically arranged based on the axis center of the lever block 11. In addition, the lever 12 is slidably connected to the lever block 11, and the sliding direction of the lever 12 is parallel to the axis direction of the guide shaft 10. An elastic member is connected between the lever 12 and the lever block 11, and the elastic member is used to provide an elastic force acting on the lever 12 in the axial direction of the lever 12. In this way, when the tightening device moves toward the direction of the restraining tray, if the lever 12 collides with the rotating rod 21, the lever 12 moves back under the action of the elastic member, and the elastic member provides a buffering effect, thereby avoiding a hard contact collision between the lever 12 and the rotating rod 21, thereby avoiding the rotating rod 21 from being bent and damaged by collision, and avoiding power components such as the motor and the reducer from being damaged by collision.

[0035] In a specific embodiment, a guide hole is provided on the lever block 11, and the lever 12 is slidably connected in the guide hole. Further, the guide hole includes a first guide hole 110 and a second guide hole 111 which are connected to each other, and the diameter of the second guide hole 111 is smaller than the diameter of the first guide hole 110. The lever 12 includes a rod 122 and a head 121, and the diameter of the head 121 is larger than the diameter of the rod 122. The head 121 is slidably connected in the first guide hole 110, and the rod 122 is slidably connected in the second guide hole 111. Through the above-mentioned structural setting, it is ensured that the lever 12 slides stably in the lever block 11, and under the cooperation of the guide hole of the step structure and the lever 12, the lever 12 can be prevented from falling off from the lever block 11.

[0036] In this embodiment, the end of the rod portion 122 away from the head 121 is set as a conical surface, and the apex of the conical surface is flattened. The design of the conical surface can reduce the collision area between the lever 12 and the rotating rod 21, and can quickly stagger after the collision. The flattening of the apex of the conical surface can prevent the rotating rod 21 from being stabbed.

[0037] In some embodiments, the elastic member includes a compression spring 14, which is connected between the head 121 and the bottom of the first guide hole 110. Further, the head 121 is provided with a fixing hole 123, one end of the compression spring 14 is connected to the fixing hole 123, and the end of the first guide hole 110 away from the second guide hole 111 passes through the lever block 11. The guide shaft 10 is provided with a countersunk hole 101. When the lever block 11 and the guide shaft 10 are fixedly connected by bolts, the first guide hole 110 is coaxial with the countersunk hole 101, and the other end of the compression spring 14 abuts against the countersunk hole 101. The above structural setting facilitates the installation of the lever 12 and the compression spring 14, and the structure is stable after installation and will not fall off.

[0038] In some embodiments, a ball structure 13 is provided at one end of the lever block 11 away from the guide shaft 10, and the ball structure 13 is used to reduce the contact area between the lever block 11 and the screw 20. Specifically, the ball structure 13 includes a receiving groove 131 provided on the lever block 11, a ball 132 located in the receiving groove 131, and a ball cover plate 133 covered on the receiving groove 131, and an opening is provided on the ball cover plate 133, a part of the ball 132 extends out of the opening and the ball 132 is in sliding contact with the edge of the opening, and the ball 132 is in sliding contact with the lever block 11 and the screw The rod 20 is on the same axis. When the lever 12 and the rotating rod 21 are staggered and engaged, the tightening device will be parallel to the screw 20 in the restraint tray. In an unexpected situation, when the lever block 11 is not parallel to the screw 20, the end of the screw 20 contacts the ball 132 (the end of the screw 20 in the prior art contacts the end of the lever block 11, which will cause interference in the non-parallel state, causing damage to the screw 20 or the tightening device). The ball 132 rotates during the non-parallel state, which can reduce the contact area and resistance, thereby avoiding damage to the screw 20 or the tightening device.

[0039] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A restraint pallet tightening device, comprising a guide shaft, a lever block and a lever, wherein the guide shaft is used to connect with the main shaft of the motor, and the lever block is connected to the guide shaft, characterized in that: The lever is slidably connected to the lever block, and the sliding direction of the lever is parallel to the axial direction of the guide shaft. An elastic member is connected between the lever and the lever block, and the elastic member is used to provide an elastic force acting on the lever in the axial direction of the lever.

2. A restraint pallet tightening device according to claim 1, characterized in that: The lever block is connected with two levers, and the two levers are symmetrically arranged based on the axis center of the lever block.

3. A restraint pallet tightening device according to claim 2, characterized in that: The lever block is provided with a guide hole, and the lever is slidably connected in the guide hole.

4. A restraint pallet tightening device according to claim 3, characterized in that: The guide hole includes a first guide hole and a second guide hole which are connected to each other, and the diameter of the second guide hole is smaller than the diameter of the first guide hole; the shift rod includes a rod portion and a head portion, the diameter of the head portion is larger than the diameter of the rod portion, the head portion is slidably connected to the first guide hole, and the rod portion is slidably connected to the second guide hole.

5. A restraint pallet tightening device according to claim 4, characterized in that: One end of the rod portion away from the head portion is provided with a conical surface, and the apex of the conical surface is ground flat.

6. A restraint pallet tightening device according to claim 4, characterized in that: The elastic member comprises a compression spring connected between the head and the bottom of the first guide hole.

7. A restraint pallet tightening device according to claim 6, characterized in that: The head is provided with a fixing hole, and one end of the compression spring is connected to the fixing hole.

8. The restraint pallet tightening device according to claim 1, characterized in that: A ball structure is arranged at one end of the lever block away from the guide shaft, and the ball structure is used to reduce the contact area between the lever block and the screw rod.

9. The restraint pallet tightening device according to claim 8, characterized in that: The ball structure includes a receiving groove arranged on the lever block, a ball located in the receiving groove, and a ball cover plate covering the receiving groove. The ball cover plate is provided with an opening, a part of the ball extends out of the opening and the ball is in sliding contact with the edge of the opening.

10. The restraint pallet tightening device according to claim 9, characterized in that: The ball, the lever block and the screw are located on the same axis.

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