Battery cell tab folding device for lithium battery packaging production line
By designing an automated battery cell folding ear device, using the bending channel and limit structure, the problems of low production efficiency and poor bending accuracy of folding ears in the lithium battery packaging production line are solved, and efficient and accurate ears are achieved Bending improves product quality and consistency.
Patent Information
- Application Number
- CN202420637486.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-03-29
AI Technical Summary
In the existing lithium battery packaging production lines, the production efficiency of the folding ear is low and the bending accuracy is poor, which affects the product quality and consistency, mainly due to the efficiency and accuracy problems caused by manual operation.
A battery-cell folding ear device is designed, including machine base, station seat, sliding groove, bending block, abutment mechanism and other components. Through automated bending channels and limit structures, automatic bending of the ear is achieved. Folding and position correction ensures bending accuracy and consistency.
It improves the production efficiency and product quality of lithium battery cells, ensures the uniformity and stability of the bending position of the extreme ears, reduces component wear, and improves the service life and automation level of the device.
Smart Images
Figure CN222153462U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium battery production, in particular to a battery cell folding ear device for a lithium battery packaging production line. Background Art
[0002] In the structure of lithium battery cells, the tabs are conductive sheets connecting the positive and negative poles of the cell, and are used to lead the electrical energy inside the battery for use by external devices. Folding the tabs refers to bending or folding the tabs to better adapt to the shape and size of the cell and ensure their stable connection with the external connector.
[0003] In the prior art, the tab folding process on the lithium battery packaging production line is mostly carried out by manual bending of the battery cell tabs. However, manual operation has the following problems: 1. The production efficiency of manual tab folding is low, which is difficult to meet the mass production of lithium batteries; 2. Manual tab folding cannot ensure the bending accuracy of the tabs, and the bending position of the tabs is not uniform, affecting the quality and consistency of the product. Utility Model Content
[0004] In view of the deficiencies in the above-mentioned prior art, the present application provides a device for folding the tabs of a lithium battery cell packaging production line, which aims to improve the production efficiency of the battery cell and can efficiently, accurately and stably bend the tabs to a specified position to improve the quality and consistency of the product.
[0005] The above invention objectives of the present application are achieved through the following technical solutions:
[0006] A machine base, a workstation seat is arranged on the machine base, a first sliding groove is vertically provided on the workstation seat, a centering block is arranged in the first sliding groove, a bending block is slidably provided on the first sliding groove, a matching groove is arranged in the middle of the bending block, the centering block is located directly above the bending block and is matched with the matching groove, two opposite second sliding grooves are horizontally provided on the top of the workstation seat, each of the second sliding grooves is connected to the first sliding groove and is slidably provided with a positioning block, and a bending channel for placing the pole ear is formed between the positioning block, the centering block and the bending block;
[0007] The abutment mechanism is arranged on the machine base. When the battery cell pole ear is located in the bending channel, the abutment mechanism is used to abut the bending block from above and drive the alignment block to slide close to the centering block.
[0008] By adopting the above technical scheme, when the battery cell pole ear is located in the bending channel, the abutment mechanism can abut the pole ear downward to the bending block, and drive the bending block to slide vertically in the first sliding groove, so that the pole ear completes the bending process under the action of the abutment mechanism and the bending block clamping up and down. At the same time, the alignment block slides horizontally in the second sliding groove close to the centering block until it abuts the outer edge of the pole ear, so that the two pole ears are centered close to the inside, thereby realizing the horizontal position correction of the pole ear. Compared with the traditional manual folding of the pole ear operation, it is only necessary to place the battery cell pole ear on the bending block, and the abutment mechanism can drive the pole ear to cooperate with the bending channel for automatic bending, which can improve production efficiency. The pole ear is bent under the limiting action of the centering block, the alignment block, the bending block and the abutment mechanism in all directions, which can ensure the bending accuracy of the pole ear, so that the bending position of the pole ear is unified, thereby improving the quality and consistency of the product.
[0009] In a preferred example, the present application can be further configured as follows: the abutment mechanism includes a lifting plate, which is vertically slidably arranged on the machine base, and a first abutment member and a second abutment member are arranged at the bottom of the lifting plate, the first abutment member is located directly above the bending channel and is used to abut the bending block, the side of the alignment block away from the centering block is an inclined surface, and the second abutment member is located directly above the inclined surface, and when the first abutment member abuts against the bending block, the second abutment member abuts against the inclined surface, and a first cylinder is vertically installed on the machine base, and a piston rod of the first cylinder is fixedly connected to the lifting plate.
[0010] By adopting the above technical solution, when the pole ear of the battery cell is located in the bending channel, the first cylinder is started to drive the lifting plate to drive the first abutment member to move downward until it abuts the pole ear and the bending block, thereby realizing the abutment function of the pole ear and the bending block. At the same time, the second abutment member abuts against the inclined surface, so that the second abutment member can provide the alignment block with a thrust to slide in the direction close to the center block, thereby realizing the function of driving the alignment block to slide at the same time.
[0011] In a preferred example, the present application can be further configured as follows: the second abutment member includes a roller, the roller is rotatably connected to the lifting plate, and when the first abutment member abuts against the bending block, the roller abuts against the inclined surface.
[0012] By adopting the above technical solution, a roller is provided, and when the roller abuts against the inclined surface of the alignment block, the sliding friction between the two can be converted into rolling friction, thereby reducing the wear of the alignment block and increasing the service life of the components.
[0013] In a preferred example, the present application can be further configured as follows: a first sliding rod passes through the machine base corresponding to the position sliding of the bending block, the bottom of the bending block is fixedly connected to the top of the first sliding rod, the first sliding rod is sleeved with a first spring, one end of the first spring is fixedly connected to the bottom of the bending block and the other end is fixedly connected to the machine base.
[0014] By adopting the above technical solution, a first sliding rod is set to provide an installation position for the first spring, and provide a guiding function for the bending block and the first spring. When the pole ear and the bending block move downward at the same time to perform a bending operation, the first spring is compressed and deformed to provide an upward thrust to the bending block, so that the bending block slides downward with the pole ear while providing an upward support to the pole ear, thereby further improving the upper and lower clamping effect of the abutment mechanism and the bending block, stabilizing the bending effect, and after completing the bending process and taking out the battery cell, the first spring can drive the bending block to complete the reset upward, which is convenient for subsequent bending operations of the battery cell.
[0015] In a preferred example, the present application can be further configured as follows: an installation groove is opened in the bottom wall of the second sliding groove along its length direction, a second sliding rod is fixedly installed in the installation groove along its length direction, a sliding block is slidably connected to the second sliding rod, the sliding block is fixedly connected to the bottom of the alignment block, a second spring is sleeved on the second sliding rod, one end of the second spring is fixedly connected to a side wall of the installation groove close to the centering block and the other end is fixedly connected to the sliding block.
[0016] By adopting the above technical solution and setting a second spring, after the bending process is completed and the battery cell is taken out, the second spring can drive the slider to drive the alignment block to slide away from the centering block to complete the reset, which is convenient for subsequent bending operations of the battery cell.
[0017] In a preferred example, the present application can be further configured as follows: a positioning fixture is provided at a position of the machine base corresponding to the work station seat, the positioning fixture includes two positioning side plates, a positioning channel with openings at both ends is formed between the two positioning side plates, the positioning channel is used for placing the battery cell, one end of the positioning channel is constructed and connected to the bending channel, and the other end of the positioning channel is provided with a pushing component for pushing the battery cell to slide.
[0018] By adopting the above technical solution and setting a positioning fixture, it is possible to provide an installation position for the battery cell to be processed, which is convenient for the staff to load the materials. At the same time, the positioning channel formed by the two positioning side plates connected to the bending channel is arranged to facilitate the pushing component to automatically push the battery cell until the pole ear is located in the bending channel, thereby realizing automatic loading and improving production efficiency.
[0019] In a preferred example, the present application can be further configured as follows: the pushing assembly includes a pushing block and a second cylinder, the pushing block is slidably arranged in the positioning channel and is adapted to the positioning channel, the second cylinder is horizontally installed on the machine base, and the piston rod of the second cylinder is fixedly connected to the side of the pushing block away from the positioning fixture.
[0020] By adopting the above technical solution, the second cylinder is started, so that the piston rod drives the push block to slide in the positioning channel until it contacts the battery cell to be processed, so that the battery cell can be automatically pushed until the tab is located in the bending channel.
[0021] In summary, the present application includes at least one of the following beneficial technical effects:
[0022] 1. Compared with the traditional manual bending of the tabs, it is only necessary to place the tabs of the battery cell on the bending block. The abutment mechanism can drive the tabs to automatically bend in coordination with the bending channel, which can improve production efficiency. The tabs are bent under the limiting action of the centering block, the alignment block, the bending block and the abutment mechanism in all directions, which can ensure the bending accuracy of the tabs, so that the bending position of the tabs is unified, and the quality and consistency of the products are improved.
[0023] 2. When the pole ear and the bending block move downward at the same time to perform the bending operation, the first spring is compressed and deformed to provide an upward thrust to the bending block, so that the bending block slides downward with the pole ear while providing an upward support to the pole ear, thereby further improving the upper and lower clamping effect of the abutment mechanism and the bending block, stabilizing the bending effect, and after completing the bending process and taking out the battery cell, the first spring can drive the bending block to complete the reset upward, which is convenient for subsequent bending operations of the battery cell.
[0024] 3. By setting the second spring, after the bending process is completed and the battery cell is taken out, the second spring can drive the slider to drive the alignment block to slide away from the center block to complete the reset, which is convenient for the subsequent bending operation of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a schematic diagram of the overall structure of a cell tab folding device of a lithium battery packaging production line in one embodiment of the present application;
[0026] Figure 2 This is a schematic diagram of the structure of a workstation in one embodiment of the present application;
[0027] Figure 3 yes Figure 1 A partial enlarged schematic diagram of the middle U part;
[0028] Figure 4 It is a partial cross-sectional schematic diagram of a cell tab folding device of a lithium battery packaging production line in one embodiment of the present application.
[0029] : Reference numerals: G1, machine base; G2, work station seat; G3, first sliding groove; G4, centering block; G5, bending block; G6, matching groove; G7, second sliding groove; G8, alignment block; G9, pole ear; G10, bending channel; G11, abutment mechanism; G111, lifting plate; G112, first abutment member; G113, second abutment member; G114, first cylinder; G12, inclined surface; G13, roller; G14, first slide bar; G15, first spring; G16, mounting groove; G17, second slide bar; G18, slider; G19, second spring; G20, positioning side plate; G21, positioning channel; G22, pushing assembly; G221, pushing block; G222, second cylinder. DETAILED DESCRIPTION
[0030] The following is a description of exemplary embodiments of the present application in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.
[0031] It should be noted that the terms "first", "second", etc. in the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure.
[0032] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally means that the associated objects before and after are in an "or" relationship.
[0033] The following describes a cell tab folding device for a lithium battery packaging production line of the present application with reference to the accompanying drawings.
[0034] like Figure 1 , Figure 2 and Figure 3As shown, the cell folding ear device of the lithium battery packaging production line includes a machine base G1, on which a workstation G2 is fixedly installed, a first sliding groove G3 is vertically opened in the middle of a side surface of the workstation G2 close to the machine base G1, a centering block G4 is extended outward from the inner bottom wall of the first sliding groove G3, a bending block G5 is slidingly arranged in the first sliding groove G3, a matching groove G6 is opened in the middle of the bending block G5, and the centering block G4 is located directly above the bending block G5 and is matched with the matching groove G6 to ensure that there is no gap between the bending block G5 and the centering block G4 There is a gap, two opposite second sliding grooves G7 are horizontally provided on the top of the workstation seat G2, each second sliding groove G7 is connected to the first sliding groove G3 and is slidably provided with a positioning block G8, and a bending channel G10 for placing the pole ear G9 is formed between the positioning block G8, the centering block G4 and the bending block G5. A contact mechanism G11 is provided on the top of the machine base G1. When the battery cell pole ear G9 is located in the bending channel G10, the contact mechanism G11 is used to contact the bending block G5 from above and drive the positioning block G8 to slide close to the centering block G4. When the cell tab G9 is located in the bending channel G10, the abutment mechanism G11 can abut the tab G9 downward to the bending block G5, and drive the bending block G5 to slide vertically in the first sliding groove G3, so that the tab G9 is clamped up and down by the abutment mechanism G11 and the bending block G5 to complete the bending process. At the same time, the alignment block G8 slides horizontally in the second sliding groove G7 in the direction close to the centering block G4 until it abuts against the outer edge of the tab G9, so that the two tabs G9 are centered close to the inside, and the tab G9 is horizontally aligned. Compared with the traditional manual folding of the pole ear G9, it is only necessary to place the battery cell pole ear G9 on the bending block G5, and the abutment mechanism G11 can drive the pole ear G9 to cooperate with the bending channel G10 for automatic bending, which can improve the production efficiency. The pole ear G9 is bent under the limiting action of the centering block G4, the alignment block G8, the bending block G5 and the abutment mechanism G11 in various directions, which can ensure the bending accuracy of the pole ear G9, so that the bending position of the pole ear G9 is unified, and the quality and consistency of the product are improved.
[0035] Among them, Figure 1 and Figure 3As shown, the abutment mechanism G11 includes a lifting plate G111, which is vertically slidably arranged on the base G1, and a first abutment member G112 and a second abutment member G113 are arranged at the bottom of the lifting plate G111. The first abutment member G112 is located directly above the bending channel G10 and is used to abut the bending block G5. The side of the alignment block G8 away from the centering block G4 is an inclined surface G12, and the second abutment member G113 is located directly above the inclined surface G12. When the first abutment member G112 abuts against the bending block G5, the second abutment member G113 abuts against the inclined surface G12. The base G1 is vertically installed with a first abutment member G112. Cylinder G114, the piston rod of the first cylinder G114 is fixedly connected to the lifting plate G111. When the battery cell tab G9 is located in the bending channel G10, the first cylinder G114 is started to drive the lifting plate G111 to drive the first abutment member G112 to move downward until it abuts the tab G9 and the bending block G5, thereby realizing the abutment function of the tab G9 and the bending block G5. At the same time, the second abutment member G113 abuts against the inclined surface G12, so that the second abutment member G113 can provide the alignment block G8 with a thrust to slide in the direction close to the center block G4, thereby realizing the function of driving the alignment block G8 to slide.
[0036] Furthermore, in order to reduce the wear of the alignment block G8, the second abutment member G113 includes a roller G13, which is rotatably connected to the lifting plate G111. When the first abutment member G112 abuts against the bending block G5, the roller G13 abuts against the inclined surface G12. By setting the roller G13, when the roller abuts against the inclined surface G12 of the alignment block G8, the sliding friction between the two can be converted into rolling friction, thereby reducing the wear of the alignment block G8 and increasing the service life of components.
[0037] In addition, if Figure 2 and Figure 4 As shown, the base G1 slides corresponding to the position of the bending block G5 and penetrates the first slide bar G14, the bottom of the bending block G5 is fixedly connected to the top of the first slide bar G14, the first slide bar G14 is sleeved with a first spring G15, one end of the first spring G15 is fixedly connected to the bottom of the bending block G5 and the other end is fixedly connected to the base G1, by setting the first slide bar G14, it is possible to provide an installation position for the first spring G15, and provide a guiding effect for the bending block G5 and the first spring G15, between the tab G9 and the bending block G5 At the same time, when moving downward to perform the bending operation, the first spring G15 is compressed and deformed to provide an upward thrust to the bending block G5, so that the bending block G5 slides downward with the pole ear G9 while providing an upward support to the pole ear G9, thereby further improving the upper and lower clamping effect of the abutment mechanism G11 and the bending block G5, stabilizing the bending effect, and after completing the bending process and taking out the battery cell, the first spring G15 can drive the bending block G5 to complete the reset upward, which is convenient for subsequent bending operations of the battery cell.
[0038] In addition, if Figure 4 As shown, in order to realize the reset function of the alignment block G8, the inner bottom wall of the second sliding groove G7 is provided with an installation groove G16 along its own length direction, and a second sliding rod G17 is fixedly installed in the installation groove G16 along its own length direction, and a slider G18 is slidably connected to the second sliding rod G17, and the slider G18 is fixedly connected to the bottom of the alignment block G8. A second spring G19 is sleeved on the second sliding rod G17, and one end of the second spring G19 is fixedly connected to a side wall of the installation groove G16 close to the centering block G4 and the other end is fixedly connected to the slider G18. By providing the second spring G19, after the bending process is completed and the battery cell is taken out, the second spring G19 can drive the slider G18 to drive the alignment block G8 to slide in the direction away from the centering block G4 to complete the reset, so as to facilitate the subsequent bending operation of the battery cell.
[0039] In one embodiment, if Figure 1 and Figure 3 As shown, in order to reduce the cost of manual operation and improve the automation performance of the device, a positioning fixture is provided at the position of the machine base G1 corresponding to the work station G2, and the positioning fixture includes two positioning side plates G20, and a positioning channel G21 with openings at both ends is formed between the two positioning side plates G20, and the positioning channel G21 is used for placing the battery cell. One end of the positioning channel G21 is set up and connected to the bending channel G10, and the other end of the positioning channel G21 is provided with a pushing component G22 for pushing the battery cell to slide. By setting the positioning fixture, an installation position can be provided for the battery cell to be processed, which is convenient for the staff to load the material. At the same time, the setting of the positioning channel G21 formed by connecting the bending channel G10 to the two positioning side plates G20 facilitates the pushing component G22 to automatically push the battery cell until the tab G9 is located in the bending channel G10, which can realize automatic loading and improve production efficiency.
[0040] Specifically, the pushing assembly G22 includes a pushing block G221 and a second cylinder G222. The pushing block G221 is slidably arranged in the positioning channel G21 and is adapted to the positioning channel G21. The second cylinder G222 is horizontally installed on the machine base G1. The piston rod of the second cylinder G222 is fixedly connected to the side of the pushing block G221 away from the positioning fixture. By starting the second cylinder G222, the piston rod drives the pushing block G221 to slide in the positioning channel G21 until it contacts the battery cell to be processed, thereby automatically pushing the battery cell until the tab G9 is located in the bending channel G10.
[0041] The implementation principle of a cell tab folding device for a lithium battery packaging production line in the embodiment of the present application is as follows: when working, the cell to be processed is first placed in the positioning channel G21 formed by the two positioning side plates G20, and the tab G9 is downwardly abutted to the bending block G5 through the abutment mechanism G11, and the bending block G5 is driven to slide vertically in the first sliding groove G3, so that the tab G9 completes the bending process under the action of the upper and lower clamping of the abutment mechanism G11 and the bending block G5, and at the same time, the alignment block G8 slides horizontally in the second sliding groove G7 close to the centering block G4 until it abuts against the outer edge of the tab G9, so that the two Each tab G9 is centered close to the inside to achieve horizontal position correction of the tab G9. Compared with the traditional manual folding of the tab G9, it is only necessary to place the battery cell tab G9 on the bending block G5. The abutment mechanism G11 can drive the tab G9 to automatically bend in cooperation with the bending channel G10, which can improve production efficiency. The tab G9 is bent under the limiting action of the centering block G4, the alignment block G8, the bending block G5 and the abutment mechanism G11 in various directions, which can ensure the bending accuracy of the tab G9, so that the bending position of the tab G9 is unified, thereby improving product quality and consistency.
[0042] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.
Claims
1. A cell tab folding device for a lithium battery packaging production line, characterized in that: include: A machine base (G1), wherein a work station seat (G2) is arranged on the machine base (G1), the work station seat (G2) is vertically provided with a first sliding groove (G3), a centering block (G4) is arranged in the first sliding groove (G3), a bending block (G5) is slidably arranged in the first sliding groove (G3), a matching groove (G6) is arranged in the middle of the bending block (G5), the centering block (G4) is located directly above the bending block (G5) and is matched with the matching groove (G6), two opposite second sliding grooves (G7) are horizontally arranged on the top of the work station seat (G2), each of the second sliding grooves (G7) is connected to the first sliding groove (G3) and is slidably provided with a positioning block (G8), and a bending channel (G10) for placing a pole ear (G9) is formed between the positioning block (G8), the centering block (G4) and the bending block (G5); An abutment mechanism (G11), wherein the abutment mechanism (G11) is arranged on the machine base (G1), and when the battery cell tab (G9) is located in the bending channel (G10), the abutment mechanism (G11) is used to abut the bending block (G5) from above and drive the alignment block (G8) to slide close to the centering block (G4).
2. A cell tab folding device for a lithium battery packaging production line as claimed in claim 1, characterized in that: The abutment mechanism (G11) comprises a lifting plate (G111), the lifting plate (G111) is vertically slidably arranged on the machine base (G1), a first abutment member (G112) and a second abutment member (G113) are arranged at the bottom of the lifting plate (G111), the first abutment member (G112) is located directly above the bending channel (G10) and is used to abut the bending block (G5), and the alignment block (G8) is away from the centering block (G4) One side surface of the machine base (G1) is an inclined surface (G12), and the second abutment member (G113) is located directly above the inclined surface (G12). When the first abutment member (G112) abuts against the bending block (G5), the second abutment member (G113) abuts against the inclined surface (G12). A first cylinder (G114) is vertically installed on the machine base (G1), and a piston rod of the first cylinder (G114) is fixedly connected to the lifting plate (G111).
3. A cell tab folding device for a lithium battery packaging production line as claimed in claim 2, characterized in that: The second abutment member (G113) comprises a roller (G13), and the roller (G13) is rotatably connected to the lifting plate (G111). When the first abutment member (G112) abuts against the bending block (G5), the roller (G13) abuts against the inclined surface (G12).
4. A cell tab folding device for a lithium battery packaging production line as claimed in claim 1, characterized in that: The machine base (G1) is slidably connected to the position of the bending block (G5) via a first slide bar (G14); the bottom of the bending block (G5) is fixedly connected to the top of the first slide bar (G14); the first slide bar (G14) is sleeved with a first spring (G15); one end of the first spring (G15) is fixedly connected to the bottom of the bending block (G5) and the other end is fixedly connected to the machine base (G1).
5. The cell tab folding device for a lithium battery packaging production line according to claim 1, characterized in that: The bottom wall of the second sliding groove (G7) is provided with a mounting groove (G16) along its length direction, a second sliding rod (G17) is fixedly installed in the mounting groove (G16) along its length direction, a sliding block (G18) is slidably connected to the second sliding rod (G17), the sliding block (G18) is fixedly connected to the bottom of the alignment block (G8), a second spring (G19) is sleeved on the second sliding rod (G17), one end of the second spring (G19) is fixedly connected to a side wall of the mounting groove (G16) close to the centering block (G4), and the other end is fixedly connected to the sliding block (G18).
6. A cell tab folding device for a lithium battery packaging production line as claimed in claim 1, characterized in that: A positioning fixture is provided at a position of the machine base (G1) corresponding to the workstation seat (G2), and the positioning fixture includes two positioning side plates (G20). A positioning channel (G21) with openings at both ends is formed between the two positioning side plates (G20). The positioning channel (G21) is used for placing the battery cell. One end of the positioning channel (G21) is built and connected to the bending channel (G10), and the other end of the positioning channel (G21) is provided with a pushing component (G22) for pushing the battery cell to slide.
7. A cell tab folding device for a lithium battery packaging production line as claimed in claim 6, characterized in that: The pushing assembly (G22) comprises a pushing block (G221) and a second cylinder (G222); the pushing block (G221) is slidably disposed in the positioning channel (G21) and is adapted to the positioning channel (G21); the second cylinder (G222) is horizontally mounted on the machine base (G1); and the piston rod of the second cylinder (G222) is fixedly connected to a side of the pushing block (G221) away from the positioning fixture.