Lithium battery lamination grabbing mechanism

Abstract

The utility model relates to a grabbing mechanism for lithium battery laminations, which comprises a rotating device comprising a driver and a rotating table, the driver is connected with the rotating table, and the driver is used for driving the rotating table to rotate; the first synchronous clamping device comprises a first bidirectional spiral lead screw, a first sliding rail, a first motor, two clamping plates and two first connecting seats, the first motor is connected with the first bidirectional spiral lead screw, and the upper portions of the two clamping plates are fixedly connected with the two first connecting seats in a one-to-one correspondence mode; the two first connecting bases are installed on the forward thread section and the reverse thread section of the first two-way spiral lead screw through lead screw sleeves correspondingly, the second synchronous clamping device comprises a second two-way spiral lead screw, a second sliding rail, a second motor, two connecting fixing plates and two second connecting bases, and the lifting device is installed on the two connecting fixing plates; the grabbing mechanism provided by the utility model is high in automation degree, can complete automatic grabbing of the laminated sheets completely, efficiently and stably, and improves the automation and stability in the production process.

Description

Technical Field

[0001] This utility model belongs to the field of lithium battery production technology, specifically relating to a gripping mechanism for stacked lithium batteries. Background Technology

[0002] With the development of new energy technologies, the application range of batteries is becoming increasingly wide, mainly in the fields of consumer electronics, electric vehicles, and energy storage. Among them, lithium batteries have superior energy storage performance, high voltage platform, and light weight, and are more widely used in new energy technologies. In the lithium battery production process, stacking equipment is needed to stack the sheets, followed by cutting. In the traditional production process, the collection of lithium battery stacks is done manually, which consumes a lot of manpower and time.

[0003] Existing automated lithium battery gripping mechanisms primarily focus on the replacement of automotive lithium batteries and the movement and gripping of pre-assembled lithium batteries. Methods employed include adsorption gripping, electromagnetic gripping, and claw gripping. However, due to the repeated folding of the stacked sheets, existing devices cannot completely grip the stacked sheets during the gripping process, making automated mechanical gripping of the stacked sheets quite complex. Furthermore, during automated gripping, the clamping force of rigid gripping mechanisms can cause deformation of the stacked sheets, reducing productivity. Additionally, the diverse shapes and sizes of the stacked sheets necessitate gripping mechanisms with high adaptability and adjustability. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a gripping mechanism for lithium battery stacks, which solves the technical problems such as the easy deformation of stacks caused by the use of rigid gripping mechanisms.

[0005] To solve the above problems, the technical solution of this utility model is: a gripping mechanism for lithium battery stacks, comprising:

[0006] A rotating device includes a driver and a rotary table, the driver being connected to the rotary table and used to drive the rotary table to rotate;

[0007] The first synchronous clamping device includes a first bidirectional spiral screw, a first slide rail, a first motor, two clamping plates, and two first connecting seats. The first bidirectional spiral screw is horizontally rotatably mounted on a rotating platform. The first slide rail is fixedly mounted on the rotating platform and is parallel to the first bidirectional spiral screw. The first motor is connected to the first bidirectional spiral screw and drives it to rotate. The upper parts of the two clamping plates are fixedly connected to the two first connecting seats one-to-one. The two first connecting seats are respectively mounted on the forward and reverse threaded sections of the first bidirectional spiral screw through screw sleeves. Both first connecting seats are slidably mounted on the first slide rail. The first bidirectional spiral screw rotates forward and reverse to move the two clamping plates closer to each other and further away from each other. The two clamping plates cooperate to clamp stacked pieces.

[0008] The second synchronous clamping device includes a second bidirectional spiral screw, a second slide rail, a second motor, two connecting fixing plates, and two second connecting seats. The second bidirectional spiral screw is horizontally rotatably mounted on a rotating platform. The second slide rail is fixedly mounted on the rotating platform and is parallel to the second bidirectional spiral screw. The second motor is connected to the second bidirectional spiral screw and is used to drive the second bidirectional spiral screw to rotate. The upper parts of the two connecting fixing plates are fixedly connected to the two second connecting seats one-to-one. The two second connecting seats are respectively mounted on the forward thread section and the reverse thread section of the second bidirectional spiral screw through screw sleeves. Both second connecting seats are slidably disposed on the second slide rail. The forward and reverse rotation of the second bidirectional spiral screw causes the two connecting fixing plates to move closer and further apart from each other. The second bidirectional spiral screw and the first bidirectional spiral screw form a cross structure.

[0009] The lifting device has two parts, which are respectively installed on two connecting and fixing plates. The lifting end of the lifting device is fixedly installed with the lifting plate.

[0010] There are two propulsion cylinders, which are respectively installed on two lifting plates. One propulsion cylinder has a lifting plate fixedly installed on its propulsion end, and the other propulsion cylinder has a propulsion plate installed on its propulsion end. The two propulsion cylinders are used to drive the lifting plate and the propulsion plate to move closer and further away from each other. The propulsion plate is used to push the stacked pieces onto the lifting plate under the drive of the corresponding propulsion cylinder.

[0011] Preferably, a brake disc is coaxially fixedly mounted on the first bidirectional spiral screw and / or the second bidirectional spiral screw, and a brake caliper corresponding to the brake disc is fixedly mounted on the rotating platform.

[0012] Preferably, the brake disc is located on the end of the corresponding bidirectional screw that is furthest from the corresponding motor.

[0013] Preferably, the lifting device includes:

[0014] The lifting motor is fixedly mounted on the connecting plate.

[0015] The gear is rotatably mounted on the connecting plate; the lifting motor is connected to the gear through a transmission assembly; the lifting motor is used to drive the gear to rotate.

[0016] A movable rack is vertically fixed on the lifting plate, and the movable rack is meshed with a gear.

[0017] The movable guide rail is vertically fixedly installed on the lifting plate;

[0018] The guide block is fixedly installed on the connecting plate and slides on the moving guide rail.

[0019] Preferably, the transmission assembly includes:

[0020] Synchronous pulley one is coaxially fixedly mounted on the motor shaft of the lifting motor;

[0021] Synchronous pulley two is fixedly connected to the gear on the same axis;

[0022] The synchronous transmission belt is fitted onto synchronous pulley one and synchronous pulley two.

[0023] Preferably, a flexible rubber block that contacts the stacked pieces is fixedly disposed on the clamping surface of the clamping plate.

[0024] Preferably, a support block is fixedly provided at the lower part of the gripping surface of the gripping plate, and the support block is used to support the stacked pieces.

[0025] Preferably, the two clamping plates and the two connecting fixing plates are located around the stack of pieces during the clamping process.

[0026] Preferably, it also includes a fixed platform, on which a vertical connecting shaft is rotatably mounted via bearings. A horizontal plate is fixedly installed in the middle of the connecting shaft, with the horizontal plate located above the fixed platform. A bearing is installed between the horizontal plate and the fixed platform. The lower end of the connecting shaft is connected to the rotary table via a flange, and the upper end of the connecting shaft is connected to a driver. The driver is used to drive the connecting shaft to rotate, thereby causing the rotary table to rotate.

[0027] Preferably, the driver is a drive motor.

[0028] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0029] The gripping mechanism of this invention has a high degree of automation and good adjustability. It can complete the automated gripping of stacked pieces in a complete, efficient and stable manner, reducing manual operation and improving the automation and stability of the production process. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the lithium battery stacking grasping mechanism of this utility model;

[0031] Figure 2This is a schematic diagram of the rotating platform in the lithium battery stacking grasping mechanism of this utility model;

[0032] Figure 3 yes Figure 2 Schematic diagram of a partial cross-section at point A in the middle;

[0033] Figure 4 This is a schematic diagram of the bidirectional spiral screw mechanism in the lithium battery stacking grasping mechanism of this utility model;

[0034] Figure 5 This is a schematic diagram of the brake in the gripping mechanism for lithium battery stacking of this utility model;

[0035] Figure 6 This is a schematic diagram of the lifting device in the lithium battery stacking grasping mechanism of this utility model;

[0036] Figure 7 This is a schematic diagram of the propulsion cylinder in the gripping mechanism for lithium battery stacking of this utility model;

[0037] Figure 8 This is a schematic diagram of the first synchronous gripping device in the lithium battery stacking gripping mechanism of this utility model.

[0038] Reference numerals: 1. Rotating device; 11. Driver; 12. Rotary table; 2. First synchronous clamping device; 21. First bidirectional spiral screw; 22. First slide rail; 23. First motor; 24. Clamping plate; 241. Flexible rubber block; 242. Support block; 25. First connecting seat; 251. Mounting plate; 252. Connecting side plate; 3. Second synchronous clamping device; 31. Second bidirectional spiral screw; 32. Second slide rail; 34. Connecting fixing plate; 35. Second connecting... 4. Seat; 41. Lifting device; 42. Lifting plate; 43. Lifting motor; 44. Gear; 45. Moving rack; 46. Moving guide rail; 47. Guide block; 48. Transmission assembly; 49. Synchronous pulley one; 40. Synchronous pulley two; 41. Synchronous transmission belt; 50. Pushing cylinder; 51. Lifting plate; 52. Pushing plate; 6. Brake disc; 61. Brake caliper; 72. Fixed platform; 73. Bearing; 74. Connecting shaft; 75. Horizontal plate; 76. Flange; 77. Laminated plate. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0040] Example: Figures 1-8As shown, this embodiment provides a gripping mechanism for lithium battery stack 8, including a rotating device 1, a first synchronous gripping device 2, a second synchronous gripping device 3, a lifting device 4, and a propulsion cylinder 5; the rotating device 1 includes a driver 11 and a rotating table 12, the driver 11 is connected to the rotating table 12, and the driver 11 is used to drive the rotating table 12 to rotate; the first synchronous gripping device 2 includes a first bidirectional spiral screw 21, a first slide rail 22, a first motor 23, two gripping plates 24, and two first connecting seats 25, the first bidirectional spiral screw 21 is horizontally rotatably mounted on the rotating table 12, the first slide rail 22 is fixedly mounted on the rotating table 12, and the first slide rail 22 is parallel to the first bidirectional spiral screw 21. The first motor 23 is connected to the first bidirectional spiral screw 21, and the first motor 23 is used to drive the first bidirectional spiral screw 21 to rotate. The upper parts of the two clamping plates 24 are fixedly connected to the two first connecting seats 25 one by one. The two first connecting seats 25 are respectively installed on the forward thread section and the reverse thread section of the first bidirectional spiral screw 21 through the screw sleeve. The two first connecting seats 25 are slidably arranged on the first slide rail 22. The first bidirectional spiral screw 21 rotates forward and reverse to drive the two clamping plates 24 to move closer and further away from each other. The two clamping plates 24 cooperate to clamp the stacked pieces 8. The second synchronous clamping device 3 includes the second bidirectional spiral screw 31, the second slide rail 32, the second motor, and the two connecting plates 24. The second bidirectional spiral screw 31 is horizontally rotatably mounted on the rotary table 12, connected to the fixed plate 34 and two second connecting seats 35. A second slide rail 32 is fixedly mounted on the rotary table 12, parallel to the second bidirectional spiral screw 31. A second motor is connected to the second bidirectional spiral screw 31 and drives its rotation. The upper parts of the two fixed plates 34 are fixedly connected to the two second connecting seats 35 one-to-one. The two second connecting seats 35 are respectively mounted on the forward and reverse thread sections of the second bidirectional spiral screw 31 via screw sleeves. Both second connecting seats 35 are slidably mounted on the second slide rail 32. The second bidirectional spiral screw 31 rotates in the forward direction. The two connecting plates 34 are rotated in opposite directions to move closer and further apart; the second bidirectional spiral screw 31 and the first bidirectional spiral screw 21 form a cross structure; there are two lifting devices 4, which are respectively installed on the two connecting plates 34, and the lifting end of the lifting device 4 is fixedly installed with a lifting plate 41; there are two push cylinders 5, which are respectively installed on the two lifting plates 41, and the pushing end of one push cylinder 5 is fixedly installed with a lifting plate 51, and the pushing end of the other push cylinder 5 is installed with a push plate 52. The two push cylinders 5 are used to drive the lifting plate 51 and the push plate 52 to move closer and further apart, and the push plate 52 is used to push the stacked pieces 8 onto the lifting plate 51 under the drive of the corresponding push cylinder 5.

[0041] With the above configuration, using a bidirectional helical screw, only one motor is needed to achieve the clamping and releasing action of the gripping plate 24, resulting in a compact, simple, and highly efficient structure. The lifting plate and the pushing plate 52 are driven by a propulsion electric cylinder 5, which offers high control precision, fast response, stable operation, and high reliability. When gripping the lithium battery stack 8, the movement speed can be precisely adjusted according to different work requirements to accurately complete various action tasks. The use of two bidirectional, dissimilar helical screws placed in a cross shape and a rotating table 12 structure enables the gripping of lithium battery stacks 8 of different directions, shapes, and sizes, offering strong adaptability and significantly improving gripping efficiency. The motor and electric cylinder drive provides high controllability and integration with various control systems, including PLCs, industrial computers, and touch screens, enabling seamless integration for automated control. Remote monitoring and control via network communication further enhance the level of intelligent production. This gripping mechanism has a compact structure and a high degree of automation in the gripping process, reducing the cost and instability of manual collection.

[0042] The lithium battery stack 8 gripping mechanism in this embodiment is used for automated gripping of lithium battery stacks 8. Its main function is to improve the automation level of the lithium battery production line, standardize production, reduce labor costs, improve production efficiency, and ensure production stability. It has a high degree of automation, strong adaptability, and can be widely applied to the automated gripping of various types of stacks 8, standardizing production and ensuring production stability.

[0043] The gripping mechanism of this invention uses a bidirectional spiral screw to synchronously move the gripper composed of two gripping plates 24. This differs from the prior art which uses a cylinder to drive the gripper. The prior art uses a cylinder to drive the gripper, which has low precision. The repeatability of a regular cylinder is only about ±1mm. The cylinder is not precise enough and will cause damage to the stacked pieces 8 when gripping them. In contrast, the bidirectional spiral screw device of this invention has high positioning precision, with a repeatability of ±0.01mm or even higher. The precise control effectively reduces damage to the stacked pieces 8.

[0044] Existing devices employ methods such as adsorption gripping, electromagnetic gripping, and claw gripping. However, due to the repeated folding of the stacked sheets 8, adsorption gripping and electromagnetic gripping can only grip the top layer of the stacked sheets 8. Existing claw grippers are designed for assembled lithium batteries; when used to grip the stacked sheets 8 during the production process, the folding nature of the stacked sheets 8 prevents them from gripping the bottom sheets, thus failing to grip the complete stacked sheets 8. The push cylinder 5 of this invention can effectively grip the stacked sheets 8 completely. This invention differs from existing technologies by adding a push cylinder 5, a push plate 52, and a lifting plate 51. This invention uses two push cylinders 5 to control the movement of the push plate 52 and the lifting plate 51 to achieve the initial gripping of the stacked sheets 8.

[0045] During operation, the rotary table 12 first rotates to a suitable position. The bidirectional spiral screw adjusts the distance between the two clamping plates 24 and the distance between the two connecting and fixing plates 34 according to the size of the stacked pieces 8. At the same time, the lifting device 4 drives the push cylinder 5 to the corresponding position where the stacked pieces 8 can be gripped. The push cylinder 5 controls the push plate 52 to push the stacked pieces 8 onto the lifting plate 51. The lifting device 4 lifts the lifting plate 51. The first motor 23 drives the first bidirectional spiral screw 21 to rotate, thereby driving the clamping plate 24 to clamp the stacked pieces 8.

[0046] In this embodiment, a lithium battery stack gripping mechanism is provided, wherein a first bidirectional spiral screw 21 and a second bidirectional spiral screw 31 are respectively mounted on the lower part of the rotary table 12 via a screw assembler.

[0047] This embodiment provides a gripping mechanism for stacked lithium batteries. A brake disc 6 is coaxially mounted on the first bidirectional spiral screw 21 and / or the second bidirectional spiral screw 31. A brake caliper 61, corresponding to the brake disc 6, is fixedly mounted on the rotary table 12. This configuration uses the friction between the brake caliper 61 and the brake disc 6 to brake the corresponding bidirectional spiral screw. The brake disc 6 and brake caliper 61 work together to fix the gripping plate 24 after the stacked batteries 8 are gripped. This avoids damage to the product caused by excessive force applied by the first motor 23, or product drop caused by insufficient force applied by the first motor 23, thus improving gripping stability. Unlike existing technologies that lack a braking system or use electromagnetic brakes, which have poor low-speed braking performance, low efficiency, and high temperature at low speeds requiring heat dissipation measures, and have relatively low braking torque, this embodiment's brake system, composed of the brake caliper 61 and brake disc 6, offers strong braking performance, good braking stability, and excellent heat dissipation.

[0048] In this embodiment, a gripping mechanism for stacked lithium batteries has a brake disc 6 located at the end of the corresponding bidirectional helical screw away from the corresponding motor. This configuration simplifies the structure, makes the rotary table 12 more evenly stressed, and improves the operational stability of the mechanism.

[0049] This embodiment provides a gripping mechanism for stacked lithium batteries. The lifting device 4 includes a lifting motor 42, a gear 43, a movable rack 44, a movable guide rail 45, and a guide block 46. The lifting motor 42 is fixedly mounted on a connecting plate 34. The gear 43 is rotatably mounted on the connecting plate 34. The lifting motor 42 is connected to the gear 43 via a transmission assembly 47. The lifting motor 42 drives the gear 43 to rotate. The movable rack 44 is vertically fixedly mounted on a lifting plate 41 and meshes with the gear 43. The movable guide rail 45 is vertically fixedly mounted on the lifting plate 41. The guide block 46 is fixedly mounted on the connecting plate 34 and slidably engaged on the movable guide rail 45.

[0050] With this configuration, the lifting motor 42 drives the gear 43 to rotate, which in turn drives the moving rack 44 to move up and down. As a result, the lifting plate 41 moves up and down with the moving rack 44. The guide block 46 and the moving guide rail 45 slide together, which improves the lifting stability of the lifting plate 41. The use of gear 43 and moving rack 44 for transmission makes the lifting process smooth and with low noise.

[0051] This embodiment provides a lithium battery stack gripping mechanism. The transmission assembly 47 includes a first synchronous pulley 471, a second synchronous pulley 472, and a synchronous transmission belt 473. The first synchronous pulley 471 is coaxially fixedly mounted on the motor shaft of the lifting motor 42; the second synchronous pulley 472 is coaxially fixedly connected to a gear 43; the synchronous transmission belt 473 is sleeved on the first synchronous pulley 471 and the second synchronous pulley 472. The lifting motor 42 drives the first synchronous pulley 471 to rotate, and the first synchronous pulley 471 drives the second synchronous pulley 472 to rotate through the synchronous transmission belt 473, thereby causing the gear 43 to rotate with the second synchronous pulley 472. The structure is simple, the operation is stable, and the use of belt drive makes the lifting motion smooth and the noise low.

[0052] In this embodiment, a gripping mechanism for lithium battery stacks is provided, wherein a flexible rubber block 241 is fixedly disposed on the gripping surface of the gripping plate 24 to contact the stack 8. The flexible rubber block 241 is used to improve the stability of gripping and to protect the stack 8 from damage.

[0053] In this embodiment, a gripping mechanism for lithium battery stacks is provided, wherein a support block 242 is fixedly disposed on the lower part of the gripping surface of the gripping plate 24, and the support block 242 is used to support the stack 8. With this arrangement, the support blocks 242 of the two gripping plates 24 are located at the lower part of the stack 8 to support the stack 8, which has a simple structure and improves gripping stability.

[0054] In this embodiment, a gripping mechanism for lithium battery stacks is provided, in which two gripping plates 24 and two connecting fixing plates 34 are positioned around the stack 8 during the gripping process. This arrangement, with the two gripping plates 24 and the two connecting fixing plates 34 facing each other, ensures that the gripping plates 24 and the connecting fixing plates 34 do not interfere with each other during movement, resulting in a compact arrangement and improved space utilization.

[0055] This embodiment of a lithium battery stack gripping mechanism further includes a fixed platform 7. A vertical connecting shaft 72 is rotatably mounted on the fixed platform 7 via a bearing 71. A horizontal plate 73 is fixedly disposed at the middle of the connecting shaft 72, and the horizontal plate 73 is located above the fixed platform 7. A bearing 71 is disposed between the horizontal plate 73 and the fixed platform 7. The lower end of the connecting shaft 72 is connected to a rotating platform 12 via a flange 74, and the upper end of the connecting shaft 72 is connected to a driver 11. The driver 11 is used to drive the connecting shaft 72 to rotate, thereby driving the rotating platform 12 to rotate. Preferably, the driver 11 is fixedly connected to the fixed platform 7. The flange 74 can be detachably fixedly connected to the connecting shaft 72 via fasteners.

[0056] In this embodiment, a lithium battery stack gripping mechanism is provided, wherein the bearing 71 is a deep groove ball bearing 71.

[0057] In this embodiment, a lithium battery stack gripping mechanism is provided, wherein the driver 11 is a drive motor. The motor shaft of the drive motor is connected to the vertical connecting shaft 72 by a key.

[0058] In this embodiment, a lithium battery stack gripping mechanism is provided. A lifting motor 42 is mounted on the outside of a connecting fixing plate 34, and a pusher cylinder 5 is mounted on the inside of a lifting device 4. The motor shaft of the first motor 23 and one end of the first bidirectional spiral screw 21 are connected by a coupling, and the motor shaft of the second motor and one end of the second bidirectional spiral screw 31 are connected by a coupling.

[0059] This embodiment provides a gripping mechanism for stacked lithium batteries. Both the first connecting seat 25 and the second connecting seat 35 include a mounting plate 251. Connecting side plates 252 are fixedly disposed on opposite sides of the mounting plate 251. The upper part of the mounting plate 251 is slidably connected to a corresponding slide rail, and a lead screw sleeve is disposed on the lower part of the mounting plate 251. A clamping plate 24 and a connecting fixing plate 34 are detachably and fixedly connected to the two connecting side plates 252 on the corresponding connecting seats.

[0060] This embodiment provides a gripping mechanism for stacked lithium batteries. The rotating table 12 has a plate-like structure and several openings are provided on the rotating table 12 to reduce weight and improve flexibility.

[0061] Compared with the prior art, this utility model has the advantages of high positioning accuracy, good motion stability, precise force control, ability to withstand large loads, high transmission efficiency, good low-speed braking effect, immunity to electromagnetic interference, and immunity to the folding characteristics of the stacked plates 8, allowing for complete grasping.

[0062] The high positioning accuracy, smooth motion, precise force control, ability to withstand large loads, and high transmission efficiency of this invention are due to the use of a bidirectional helical screw. The screw transmits motion through precise thread engagement, achieving high-precision linear positioning, typically reaching ±0.01mm or even higher. During movement, the continuous thread engagement ensures smooth motion with minimal speed variation, eliminating the instability caused by air pressure fluctuations found in cylinders. This improves the processing accuracy and stability of the equipment. The output force can be precisely controlled as needed; by selecting appropriate parameters such as screw diameter, pitch, and drive motor power, different force outputs can be achieved to meet various load requirements. In contrast, the output force of a cylinder mainly depends on air pressure and piston area, resulting in relatively imprecise force control. Rolling friction screws, such as ball screws, offer high transmission efficiency, typically between 90% and 99%, efficiently converting input rotational motion into linear motion, reducing energy loss, and overcoming the shortcomings of low drive accuracy, unstable motion, and low transmission efficiency of cylinders.

[0063] The good low-speed braking effect and the lack of electromagnetic interference are due to the use of a braking device in this invention. The brake caliper 61 is pressed tightly against the brake disc 6, and the friction between the two converts kinetic energy into heat energy. It is not affected by speed and can better meet the braking requirements.

[0064] Unaffected by the folding characteristics of the stacked pieces 8, it can be grasped completely. Two propulsion cylinders 5 are used, overcoming the limitation of existing technologies that cannot completely grasp the stacked pieces 8 due to their folding characteristics. This invention has the advantage of completely grasping the stacked pieces 8.

Claims

1. A gripping mechanism for lithium battery laminations, characterized by, include: The rotating device (1) includes a driver (11) and a rotating table (12). The driver (11) is connected to the rotating table (12) and the driver (11) is used to drive the rotating table (12) to rotate. The first synchronous clamping device (2) includes a first bidirectional spiral screw (21), a first slide rail (22), a first motor (23), two clamping plates (24), and two first connecting seats (25). The first bidirectional spiral screw (21) is horizontally rotatably mounted on the rotary table (12). The first slide rail (22) is fixedly mounted on the rotary table (12) and is parallel to the first bidirectional spiral screw (21). The first motor (23) is connected to the first bidirectional spiral screw (21) and is used to drive the first bidirectional spiral screw (25). Rotating towards the screw (21), the upper parts of the two clamping plates (24) are fixedly connected to the two first connecting seats (25) one by one. The two first connecting seats (25) are respectively installed on the forward thread section and the reverse thread section of the first bidirectional screw (21) through the screw sleeve. The two first connecting seats (25) are slidably set on the first slide rail (22). The first bidirectional screw (21) rotates forward and reverse to drive the two clamping plates (24) to move closer and further away from each other. The two clamping plates (24) cooperate to clamp the stacked pieces (8). The second synchronous clamping device (3) includes a second bidirectional spiral screw (31), a second slide rail (32), a second motor, two connecting fixing plates (34), and two second connecting seats (35). The second bidirectional spiral screw (31) is horizontally rotatably mounted on the rotary table (12). The second slide rail (32) is fixedly mounted on the rotary table (12) and is parallel to the second bidirectional spiral screw (31). The second motor is connected to the second bidirectional spiral screw (31) and is used to drive the second bidirectional spiral screw (31) to rotate. The upper parts of the two connecting fixing plates (34) are fixedly connected to the two second connecting seats (35) one by one. The two second connecting seats (35) are respectively installed on the forward thread section and the reverse thread section of the second bidirectional spiral screw (31) through the screw sleeve. The two second connecting seats (35) are slidably set on the second slide rail (32). The second bidirectional spiral screw (31) rotates forward and reverse to drive the two connecting fixing plates (34) to move closer and further away from each other. The second bidirectional spiral screw (31) and the first bidirectional spiral screw (21) form a cross structure. The lifting device (4) has two parts, which are respectively installed on two connecting and fixing plates (34). The lifting end of the lifting device (4) is fixedly installed with the lifting plate (41). There are two propulsion cylinders (5), which are respectively installed on two lifting plates (41). One propulsion cylinder (5) has a lifting plate (51) fixedly installed on its propulsion end, and the other propulsion cylinder (5) has a propulsion plate (52) installed on its propulsion end. The two propulsion cylinders (5) are used to drive the lifting plate (51) and the propulsion plate (52) to move closer and further away from each other, respectively. The propulsion plate (52) is used to push the stacked pieces (8) onto the lifting plate (51) under the drive of the corresponding propulsion cylinder (5).

2. The mechanism according to claim 1, wherein Brake discs (6) are coaxially fixedly mounted on the first bidirectional spiral screw (21) and / or the second bidirectional spiral screw (31), and brake calipers (61) that correspond to and cooperate with the brake discs (6) are fixedly mounted on the rotary table (12).

3. The mechanism according to claim 2, wherein The brake disc (6) is located on the end of the corresponding bidirectional screw away from the corresponding motor.

4. The mechanism according to claim 1, wherein The lifting device (4) includes: The lifting motor (42) is fixedly installed on the connecting fixing plate (34); Gear (43) is rotatably mounted on connecting fixing plate (34); lifting motor (42) is connected to gear (43) through transmission assembly (47); lifting motor (42) is used to drive gear (43) to rotate; The movable rack (44) is vertically fixed on the lifting plate (41), and the movable rack (44) is meshed with the gear (43); The movable guide rail (45) is vertically fixed on the lifting plate (41); The guide block (46) is fixedly installed on the connecting plate (34) and slides on the moving guide rail (45).

5. The mechanism according to claim 4, wherein The transmission assembly (47) includes: Synchronous pulley 1 (471) is coaxially fixed on the motor shaft of the lifting motor (42); Synchronous pulley 2 (472) is coaxially and fixedly connected to gear (43); A synchronous transmission belt (473) is fitted onto synchronous pulley one (471) and synchronous pulley two (472).

6. The mechanism according to claim 1, wherein A flexible rubber block (241) that contacts the stacked pieces (8) is fixedly installed on the clamping surface of the clamping plate (24).

7. The mechanism according to claim 1, wherein A support block (242) is fixedly installed on the lower part of the clamping surface of the clamping plate (24), and the support block (242) is used to support the stacked pieces (8).

8. The mechanism according to claim 1, wherein Two clamping plates (24) and two connecting fixing plates (34) are located around the stacked pieces (8) during the clamping process.

9. The mechanism according to claim 1, wherein It also includes a fixed platform (7), on which a vertical connecting shaft (72) is rotatably mounted via a bearing (71). A horizontal plate (73) is fixedly mounted in the middle of the connecting shaft (72), and the horizontal plate (73) is located above the fixed platform (7). A bearing (71) is provided between the horizontal plate (73) and the fixed platform (7). The lower end of the connecting shaft (72) is connected to the rotary table (12) via a flange (74), and the upper end of the connecting shaft (72) is connected to a driver (11). The driver (11) is used to drive the connecting shaft (72) to rotate so as to drive the rotary table (12) to rotate.

10. The mechanism according to claim 1, wherein The driver (11) is a drive motor.

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