Rotatable clamping soft package lithium battery cell heat sealing clamp

Abstract

The present application relates to the field of lithium battery cell packaging, in particular to a rotatable clamping soft package lithium battery cell heat sealing clamp, comprising a base, the middle part of the base is connected with a clamping mechanism; connecting mechanism, the connecting mechanism is arranged on the upper end of the clamping mechanism; chuck mechanism, the chuck mechanism is movably connected with the upper end of the clamping mechanism through the connecting mechanism, and the rotation of the lithium battery cell after clamping is realized through the chuck mechanism; the chuck mechanism comprises a clamping seat, the end of the connecting mechanism is fixedly welded with the clamping seat, the middle part of the side away from the chuck mechanism of the clamping seat is movably connected with a connecting seat, the inner side of the clamping seat is provided with equidistantly distributed positioning clamping grooves, the side of the clamping head is provided with a limiting hole, the inner side of the limiting hole is provided with a steel ball, the inner side of the clamping head is provided with a fixed seat opposite the limiting hole, and the inner side of the fixed seat is provided with a spring. Compared with the prior art, the rotatable clamping soft package lithium battery cell heat sealing clamp has the advantages of facilitating the rotation of the clamped lithium battery cell.

Description

[0001] This application is a divisional application of Chinese invention patent application No. 202110714568.X, filed on June 25, 2021, entitled "A heat-sealing fixture for soft-pack lithium battery cells and its heat-sealing process". Technical Field

[0002] This invention relates to the field of lithium battery cell packaging technology, and in particular to a rotatable clamping heat-sealing fixture for soft-pack lithium battery cells. Background Technology

[0003] With increasing public awareness of environmental protection and the growing prominence of environmental problems, environmental pollution has received increasing attention. Lithium-ion batteries, due to their advantages such as high energy density, long cycle life, stable discharge performance, and wide operating temperature range, have become ideal power sources for various portable electronic products and are the preferred power source for hybrid vehicles, pure electric vehicles, and energy storage applications. However, their manufacturing process requires heat sealing of the pouch lithium-ion cells. Therefore, specialized clamps are needed to hold the lithium-ion cells.

[0004] Currently, the heat-sealing clamps for soft-pack lithium battery cells on the market are inconvenient for clamping cylindrical lithium battery cells and have poor flexibility. After clamping, the battery cells cannot be rotated, making it inconvenient to attach the packaging film to the outside of the battery cells.

[0005] Therefore, it is necessary to provide a new rotatable clamping heat-sealing fixture for soft-pack lithium battery cells to solve the above-mentioned technical problems. Summary of the Invention

[0006] To solve the above-mentioned technical problems, the present invention provides a heat-sealing fixture for flexible lithium battery cells that allows for easy clamping and rotation of cylindrical lithium battery cells.

[0007] The rotatable clamping heat-sealing fixture for soft-pack lithium battery cells provided by the present invention includes: a base, wherein a clamping mechanism is connected to the middle of the base; a connecting mechanism, wherein the connecting mechanism is disposed at the upper end of the clamping mechanism; and a clamping head mechanism, wherein the clamping head mechanism is movably connected to the upper end of the clamping mechanism through the connecting mechanism, and the rotation of the lithium battery cell after clamping is realized by the clamping head mechanism.

[0008] The clamping mechanism includes connecting columns. Two opposing connecting columns are fixedly connected to the inner side of the base. A left clamping arm and a right clamping arm are movably connected to the middle part of the two connecting columns, respectively.

[0009] The clamping mechanism includes a clamping seat. The clamping seat is fixedly welded to the end of the connecting mechanism. A connecting seat is movably connected to the middle of the side of the clamping seat away from the clamping mechanism. The inner side of the clamping seat is provided with equally spaced positioning slots. A limit hole is opened on the side of the clamping head. A steel ball is placed inside the limit hole. A fixing seat is provided on the inner side of the clamping head opposite to the limit hole. A spring is placed inside the fixing seat.

[0010] Preferably, a left clamping arm and a right clamping arm are movably connected to the middle part of the two connecting columns, respectively. Specifically, the left clamping arm and the right clamping arm are rotatably connected to the middle part of the two connecting columns. A left clamping arm slide groove is provided at the lower part of the left clamping arm, and a right clamping arm slide groove is provided at the lower part of the right clamping arm. A connecting bolt is connected through the inner side of the left clamping arm slide groove and the right clamping arm slide groove. A guide seat is provided on the outer side of the connecting bolt, and a control air rod is connected to the middle part of the connecting bolt.

[0011] Preferably, the chuck mechanism is movably connected to the upper end of the clamping mechanism via a connecting mechanism. Specifically, the connecting mechanism includes a connecting housing, and the upper ends of the left and right clamping arms are fixedly welded to the connecting housing. A threaded hole is opened on the upper side of the connecting housing, and a fixing bolt is threadedly connected to the inner side of the threaded hole. A movable block is slidably connected to the middle of the connecting housing, and the end of the movable block is fixedly welded to the chuck mechanism.

[0012] Preferably, a connecting seat is movably connected to the middle of the side of the clamping seat away from the chuck mechanism. Specifically, a connecting bearing is fixedly connected to the middle of the side of the clamping seat away from the chuck mechanism, and a clamping head is rotatably connected to the side of the connecting bearing away from the clamping seat through the connecting seat.

[0013] Preferably, an insulating pad is fixedly bonded to the side of the connecting seat away from the clamping seat, and the surface of the insulating pad has anti-slip protrusions in a matrix pattern.

[0014] Preferably, a feeding mechanism is provided in the upper middle part of the base. The feeding mechanism includes a groove. A lifting air rod is installed in the middle of the upper middle part of the base. A lifting platform is movably connected to the upper end of the lifting air rod. A V-shaped groove is provided in the middle of the lifting platform. Two sets of positioning spring plates are arranged on the upper surface of the lifting platform.

[0015] Preferably, the upper end of the lifting air rod is movably connected to a lifting platform. Specifically, the bottom of the lifting platform is fixedly connected to a retaining seat by bolts, and the middle part of the retaining seat is rotatably connected to the lifting air rod through a bearing seat.

[0016] In addition, the present invention also provides a heat sealing process for a heat sealing fixture for soft-pack lithium battery cells, the specific steps of which are as follows:

[0017] a. The spacing of the clamping mechanism is adjusted by the connecting mechanism to ensure effective clamping of the lithium battery cell;

[0018] b. Align the lithium battery cell as close as possible to the center of the two sets of clamping heads. Control the clamping mechanism through the clamping mechanism to make the left and right clamping arms close to the center of the base, so that the insulating pads at the ends of the two sets of clamping heads press against the center of both sides of the lithium battery cell, thereby completing the positioning and clamping of the lithium battery cell.

[0019] c. By rotating the lithium battery cell, the two sets of clamping heads rotate under the action of the connecting bearing. While rotating, the packaging film is wrapped around the lithium battery cell once, and the beginning and end of the packaging film are fused together by heat treatment.

[0020] d. The lifting air rod is used to raise the V-groove on the lifting platform so that it fits with the lithium battery cell and is clamped by the positioning spring plate. At the same time, the left and right clamping arms are separated from the base by controlling the clamping mechanism.

[0021] e. By connecting the bearing housing, rotate the lifting platform to rotate the side of the lithium battery cell to the appropriate position, and then heat seal the excess packaging film at both ends of the lithium battery cell in sequence to expose the electrodes.

[0022] Compared with related technologies, the rotatable clamping heat-sealing fixture for soft-pack lithium battery cells provided by the present invention has the following advantages:

[0023] This invention provides a rotatable clamping heat-sealing fixture for soft-pack lithium battery cells. The clamping mechanism utilizes the lever principle and is pneumatically controlled for opening and closing, making operation simple, convenient, and time-saving, greatly improving the clamping efficiency of lithium battery cells. Furthermore, the connecting mechanism is movable, facilitating the adjustment of the clamping head spacing, thus enabling the fixture to clamp different types of lithium battery cells, improving its versatility. The rotation between the clamping head and the clamping base facilitates the rotation of the clamped lithium battery cell, which is beneficial for the encapsulation of the outer packaging film of the lithium battery cell. The bonding of the insulating pad further enhances the sealing effect. The clamping head provides good protection, preventing short circuits in the lithium battery cell caused by leakage during clamping and improving the safety of the clamp. The insulating pad and anti-slip protrusions are integrated and made of high-temperature resistant rubber material. Due to the properties of this material, it can buffer the two ends of the lithium battery cell during clamping and improve the stability of the lithium battery cell clamping. It is also equipped with a rotatable and lifting unloading mechanism, which facilitates secondary positioning and clamping of cylindrical lithium battery cells, and rotates the clamped lithium battery cell to a suitable operating position to facilitate heat sealing of both ends of the lithium battery cell. Attached Figure Description

[0024] Figure 1 A schematic diagram of a preferred embodiment of the heat-sealing fixture for soft-pack lithium battery cells provided by the present invention;

[0025] Figure 2 for Figure 1 The diagram shows the internal three-dimensional structure.

[0026] Figure 3 for Figure 1 The diagram shows the structure of the chuck mechanism.

[0027] Figure 4 for Figure 1 The diagram shows the structural schematic of the steel ball connection.

[0028] Figure 5 for Figure 1 The diagram shows the structure of the feeding mechanism.

[0029] The diagram is labeled as follows: 1. Base; 2. Clamping mechanism; 21. Connecting column; 22. Left clamping arm; 23. Left clamping arm slide groove; 24. Right clamping arm; 25. Right clamping arm slide groove; 26. Connecting bolt; 27. Guide seat; 28. Control air rod; 3. Connecting mechanism; 31. Connecting housing; 32. Threaded hole; 33. Fixing bolt; 34. Movable block; 4. Clamping mechanism; 41. Clamping seat; 42. Connecting bearing; 43. Connecting seat; 44. Positioning slot; 45. Clamping head; 46. Limiting hole; 47. Steel ball; 48. Fixing seat; 49. Spring; 49a. Insulating pad; 49b. Anti-slip protrusion; 5. Unloading mechanism; 51. Groove; 52. Lifting air rod; 53. Card seat; 54. Bearing seat; 55. Lifting platform; 56. V-groove; 57. Positioning spring plate. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Please refer to the following: Figures 1 to 5 The present invention provides a rotatable clamping heat sealing fixture for soft-pack lithium battery cells, comprising: a base 1, wherein a clamping mechanism 2 is connected to the middle of the base 1; a connecting mechanism 3, wherein the connecting mechanism 3 is disposed at the upper end of the clamping mechanism 2; and a clamping mechanism 4, wherein the clamping mechanism 4 is movably connected to the upper end of the clamping mechanism 2 through the connecting mechanism 3, and the rotation of the lithium battery cell after clamping is realized through the clamping mechanism 4.

[0032] In this embodiment, the clamping mechanism 2 uses a pneumatic rod to control the opening and closing, which is quick and easy to operate. The spacing of the clamping mechanism 4 can be adjusted through the connecting mechanism 3. The clamping mechanism 4 is a rotatable structure, which facilitates the rotation of the lithium battery cell after clamping and provides convenience for wrapping the packaging film on the outer wall of the lithium battery cell.

[0033] In the specific implementation process, such as Figure 1 and Figure 2As shown, the clamping mechanism 2 includes connecting posts 21. Two aligned connecting posts 21 are fixedly connected to the inner side of the base 1. A left clamping arm 22 and a right clamping arm 24 are movably connected to the middle part of the two connecting posts 21, respectively. Specifically, the left clamping arm 22 and the right clamping arm 24 are rotatably connected to the middle part of the two connecting posts 21, respectively. A left clamping arm slide groove 23 is provided at the lower part of the left clamping arm 22, and a right clamping arm slide groove 25 is provided at the lower part of the right clamping arm 24. A connecting bolt 26 is connected through the inner side of the left clamping arm slide groove 23 and the right clamping arm slide groove 25. A guide seat 27 is provided on the outer side of the connecting bolt 26, and a control air rod 28 is connected to the middle part of the connecting bolt 26.

[0034] In this embodiment, the left clamping arm 22 and the right clamping arm 24 are respectively sleeved on the middle of the two connecting posts 21. Then, the connecting bolt 26 is inserted into the groove in the middle of the guide seat 27 and passes through the left clamping arm slide groove 23 and the right clamping arm slide groove 25 in sequence. Then, the middle of the connecting bolt 26 is connected to the control rod 28. When the control rod 28 is lifted, the connecting bolt 26 moves up along the guide seat 27 and causes the left clamping arm slide groove 23 and the right clamping arm slide groove 25 to slide in opposite directions along the connecting bolt 26, so that the connecting bolt 26 is in contact with the lowest point of the left clamping arm slide groove 23 and the right clamping arm slide groove 25 respectively. At this time, the lower part of the left clamping arm 22 and the right clamping arm 24 moves up and the upper part moves down, thereby unfolding the left clamping arm 22 and the right clamping arm 24. Conversely, by compressing the control rod 28, the left clamping arm 22 and the right clamping arm 24 are closed towards the middle of the base 1.

[0035] In this embodiment, the left clamping arm 22 and the right clamping arm 24 utilize the principle of levers and are pneumatically controlled to open and close. The operation is simple, convenient, fast, and time-saving, greatly improving the clamping efficiency of lithium battery cells.

[0036] refer to Figure 1 As shown, the chuck mechanism 4 is movably connected to the upper end of the clamping mechanism 2 through the connecting mechanism 3. Specifically, the connecting mechanism 3 includes a connecting housing 31. The upper ends of the left clamping arm 22 and the right clamping arm 24 are both fixedly welded to the connecting housing 31. A threaded hole 32 is opened on the upper side of the connecting housing 31, and a fixing bolt 33 is threadedly connected to the inner side of the threaded hole 32. A movable block 34 is slidably connected to the middle of the connecting housing 31, and the end of the movable block 34 is fixedly welded to the chuck mechanism 4.

[0037] In this embodiment, one side of the clamping mechanism 4 is fixedly welded to the end of the movable block 34, and the connecting housing 31 is welded to the upper end of the clamping mechanism 2. The end of the movable block 34 is inserted into the connecting housing 31, and then the two sets of movable blocks 34 are pushed towards the lithium battery cell according to the length of the lithium battery cell, so that the clamping mechanism 4 can effectively clamp the lithium battery cell. Then, the fixing bolt 33 is rotated, and with its cooperation with the threaded hole 32, the movable block 34 is pressed and fixed, thereby completing the adjustment of the spacing of the clamping mechanism 4.

[0038] In this embodiment, the sliding connection between the movable block 34 and the connecting housing 31 facilitates the adjustment of the spacing of the clamping mechanism 4, thereby enabling the clamp to be used for clamping different types of lithium battery cells and improving its versatility.

[0039] refer to Figure 1 , Figure 3 and Figure 4 As shown, the chuck mechanism 4 includes a clamping seat 41. The clamping seat 41 is fixedly welded to the end of the connecting mechanism 3. A connecting seat 43 is movably connected to the middle of the side of the clamping seat 41 away from the chuck mechanism 4. The inner side of the clamping seat 41 is provided with equally spaced positioning slots 44. The side of the clamping head 45 is provided with a limiting hole 46. A steel ball 47 is placed inside the limiting hole 46. A fixing seat 48 is provided on the inner side of the clamping head 45, directly opposite to the limiting hole 46. A spring 49 is placed inside the fixing seat 48. The connecting seat 43 is movably connected to the middle of the side of the clamping seat 41 away from the chuck mechanism 4. Specifically, a connecting bearing 42 is fixedly connected to the middle of the side of the clamping seat 41 away from the chuck mechanism 4. The side of the connecting bearing 42 away from the clamping seat 41 is rotatably connected to the clamping head 45 through the connecting seat 43.

[0040] In this embodiment, the setting of the connecting bearing 42 facilitates the rotation of the clamping head 45 on the clamping seat 41, thereby facilitating the rotation of the lithium battery cell after clamping and making it easier to encapsulate the outer side of the lithium battery cell with a packaging film.

[0041] In this embodiment, when the clamping head 45 rotates, the steel ball 47 moves towards the inner side of the limiting hole 46 under the pressure of the inner wall of the clamping seat 41, causing the spring 49 to be compressed. After rotation, the steel ball 47 is pressed towards the outer side of the limiting hole 46 under the action of the spring force of the spring 49, and engages with the positioning groove 44 on the inner side of the clamping seat 41, so that the clamping head 45 is positioned after rotation. Through the setting of this structure, the rotation of the clamping head 45 is well damped, which improves the stability of the lithium battery cell during rotation and facilitates its fixation after rotation.

[0042] refer to Figure 1 and Figure 2 As shown, an insulating pad 49a is fixedly bonded to the side of the connecting seat 43 away from the clamping seat 41, and the surface of the insulating pad 49a has anti-slip protrusions 49b in a matrix pattern.

[0043] In this embodiment, after the clamping head 45 is connected to the clamping base 41, the insulating pad 49a is fixedly bonded to the other side of the clamping head 45, which can provide better protection for the surface of the clamping head 45, prevent short circuit of the lithium battery cell caused by leakage during clamping, and improve the safety of the clamp.

[0044] In this embodiment, the insulating pad 49a and the anti-slip protrusions 49b are an integrated structure and are made of high-temperature resistant rubber material. Due to the characteristics of this material, it can buffer the two ends of the lithium battery cell during the clamping process and prevent wear on the lithium battery cell. The anti-slip protrusions 49b increase the friction of the insulating pad 49a surface, thereby improving the stability of clamping the lithium battery cell.

[0045] refer to Figure 1 , Figure 2 and Figure 5 As shown, a feeding mechanism 5 is provided in the middle of the upper side of the base 1. The feeding mechanism 5 includes a groove 51. A lifting air rod 52 is installed in the middle of the groove 51. The upper end of the lifting air rod 52 is movably connected to a lifting platform 55. A V-groove 56 is provided in the middle of the lifting platform 55, and two sets of positioning spring plates 57 are aligned on the upper surface of the lifting platform 55. The upper end of the lifting air rod 52 is movably connected to the lifting platform 55. Specifically, a retaining seat 53 is fixedly connected to the bottom of the lifting platform 55 by bolts. The middle of the retaining seat 53 is rotatably connected to the lifting air rod 52 through a bearing seat 54.

[0046] In this embodiment, after the lithium battery cell is heat-sealed after the outer packaging film is wrapped around it, the lifting platform 55 is raised by the lifting air rod 52. The lithium battery cell squeezes the positioning spring plate 57 and slides down to the lower side of the positioning spring plate 57, where it fits into the V-groove 56, completing the secondary positioning and clamping of the cylindrical lithium battery cell. Then the clamping mechanism 2 unfolds to both sides, at which point the lithium battery cell is fully subjected to the force of the lifting platform 55.

[0047] In this embodiment, the lower part of the lifting platform 55 is rotatably connected to the lifting air rod 52 through the bearing seat 54, which facilitates the rotation of the entire lifting platform 55. The clamped lithium battery cell can be rotated to a suitable operating position, and then the two ends of the lithium battery cell can be heat-sealed.

[0048] The heat sealing process of a rotatable clamping heat sealing fixture for soft-pack lithium battery cells according to the present invention comprises the following steps:

[0049] a. The spacing of the clamping mechanism 4 is adjusted by the connecting mechanism 3 to ensure effective clamping of the lithium battery cell;

[0050] b. The lithium battery cell is aligned as close as possible to the center of the two sets of clamping heads 45. The clamping mechanism 2 controls the clamping mechanism 4 to make the left clamping arm 22 and the right clamping arm 24 close towards the center of the base 1, so that the insulating pads 49a at the ends of the two sets of clamping heads 45 press against the center of both sides of the lithium battery cell, thereby completing the positioning and clamping of the lithium battery cell.

[0051] c. By rotating the lithium battery cell, the two sets of clamping heads 45 rotate under the action of the connecting bearing 42. While rotating, the packaging film is wrapped around the lithium battery cell once, and the beginning and end of the packaging film are fused together by heat treatment.

[0052] d. The lifting air rod 52 is raised to make the V-groove 56 on the lifting platform 55 fit with the lithium battery cell and clamp it under the action of the positioning spring plate 57. At the same time, the left clamping arm 22 and the right clamping arm 24 are separated to both sides of the base 1 by controlling the clamping mechanism 2.

[0053] e. Through the connection of bearing seat 54, rotate the lifting platform 55 to rotate the side end of the lithium battery cell to a suitable position, and then heat seal the excess packaging film at both ends of the lithium battery cell in sequence to expose the electrodes.

[0054] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A heat-seal fixture for rotationally clamping a soft-pack lithium cell, characterized by, Include: Base (1), the middle of the base (1) is connected with clamping mechanism (2); Connecting mechanism (3), the connecting mechanism (3) is arranged at the upper end of the clamping mechanism (2); Chuck mechanism (4), the chuck mechanism (4) is movably connected with the upper end of the clamping mechanism (2) through the connecting mechanism (3), and the chuck mechanism (4) is used for realizing rotation after clamping the lithium battery cell; The clamping mechanism (2) includes a connecting column (21), the inner side of the base (1) is fixedly connected with two oppositely arranged connecting columns (21), and the middle parts of the two connecting columns (21) are movably connected with a left clamping arm (22) and a right clamping arm (24), respectively. The chuck mechanism (4) includes a clamping seat (41), the end of the connecting mechanism (3) is fixedly welded with the clamping seat (41), the middle part of the side, away from the chuck mechanism (4), of the clamping seat (41) is movably connected with a connecting seat (43), the inner side of the clamping seat (41) is provided with equidistantly distributed positioning clamping grooves (44), the side of the clamping head (45) is provided with a limiting hole (46), the inner side of the limiting hole (46) is provided with a steel ball (47), and the inner side of the clamping head (45) is provided with a fixed seat (48) at the position opposite to the limiting hole (46), and the inner side of the fixed seat (48) is provided with a spring (49).

2. The soft-pouch lithium cell heat-seal fixture of claim 1, wherein, The chuck mechanism (4) is movably connected with the upper end of the clamping mechanism (2) through the connecting mechanism (3), specifically, the connecting mechanism (3) includes a connecting shell (31), the upper ends of the left clamping arm (22) and the right clamping arm (24) are fixedly welded with the connecting shell (31), the upper side of the connecting shell (31) is provided with a threaded hole (32), the inner side of the threaded hole (32) is threadedly connected with a fixed bolt (33), and the middle part of the connecting shell (31) is slidably connected with a movable block (34), and the end of the movable block (34) is fixedly welded with the chuck mechanism (4).

3. The pinched soft-pack lithium cell heat seal fixture of claim 2, wherein, The middle parts of the two connecting columns (21) are movably connected with a left clamping arm (22) and a right clamping arm (24), specifically, the left clamping arm (22) and the right clamping arm (24) are rotatably connected with the middle parts of the two connecting columns (21), respectively, the lower part of the left clamping arm (22) is provided with a left clamping arm sliding groove (23), the lower part of the right clamping arm (24) is provided with a right clamping arm sliding groove (25), the inner sides of the left clamping arm sliding groove (23) and the right clamping arm sliding groove (25) are penetrated and connected with a connecting bolt (26), the outer side of the connecting bolt (26) is provided with a guide seat (27), and the middle part of the connecting bolt (26) is connected with a control air rod (28).

4. The soft-pouch lithium cell heat-seal fixture of claim 1, wherein, The middle part of the side, away from the chuck mechanism (4), of the clamping seat (41) is movably connected with a connecting seat (43), specifically, the middle part of the side, away from the chuck mechanism (4), of the clamping seat (41) is fixedly connected with a connecting bearing (42), and the side, away from the clamping seat (41), of the connecting bearing (42) is rotatably connected with a clamping head (45) through the connecting seat (43).

5. The soft-pouch lithium cell heat-seal fixture of claim 1, wherein, The connecting seat (43) is fixedly bonded with an insulating pad (49a) on the side away from the clamping seat (41), and the surface of the insulating pad (49a) is provided with anti-skid convex points (49b) in a matrix form.

6. The soft-pouch lithium cell heat-seal fixture of claim 1, wherein, The upper middle part of the base (1) is provided with a blanking mechanism (5), the blanking mechanism (5) comprises a groove (51), the upper middle part of the base (1) is provided with a groove (51) in the middle part, the middle part of the groove (51) is provided with a jacking air rod (52), the upper end of the jacking air rod (52) is movably connected with a jacking table (55), the middle part of the jacking table (55) is provided with a V-shaped groove (56), and the upper surface of the jacking table (55) is provided with two groups of positioning spring sheets (57) in a front-to-back manner.

7. The pinched soft-pack lithium cell heat seal fixture of claim 6, wherein, The upper end of the jacking air rod (52) is movably connected with a jacking table (55), specifically, the bottom of the jacking table (55) is fixedly connected with a clamping seat (53) through bolts, and the middle part of the clamping seat (53) is rotatably connected with the jacking air rod (52) through a bearing seat (54).

Images