False welding prevention tool for electromagnetic wire welding

Abstract

The invention discloses a false welding prevention tool for electromagnetic wire welding, and relates to the field of electromagnetic wire welding, the false welding prevention tool comprises a base, two ends of the surface of the base are respectively provided with a fixed seat and a movable seat, and the top of the fixed seat and the top of the movable seat are both provided with corresponding first glands; the surface, opposite to the first gland, of the fixed seat and the surface, opposite to the first gland, of the movable seat are each provided with a plurality of semicircular clamping grooves, and the diameter values of the semicircular clamping grooves are sequentially increased. First locking units are arranged between the fixed seat and the first gland and between the movable seat and the first gland, a guide groove is formed in the surface of the base, and a first guide block is installed at the bottom of the movable seat. According to the false welding prevention tool for electromagnetic wire welding, through mutual cooperation of the movable base, the fixed base, the first gland, the control unit and the first locking unit, quick butt joint and stable clamping can be conducted on electromagnetic wires in the electromagnetic wire welding process, and the electromagnetic wire welding process is more efficient and stable.

Description

Technical Field

[0001] This invention relates to electromagnetic wire welding technology, and more specifically to a tooling for preventing incomplete welds in electromagnetic wire welding. Background Technology

[0002] Electromagnetic wire is a conductive metal wire with an insulating layer, mainly used in the manufacture of coils or windings in motors, electrical appliances, and electrical instruments. It is a key material for realizing electromagnetic energy conversion and signal transmission. Its quality directly affects the performance, reliability, and service life of motors, electrical appliances, and other products, and it is widely used in many fields such as power, electronics, communications, transportation, and aerospace.

[0003] Electromagnetic wire butt welding is a common step in the production of electromagnetic equipment and motors. In existing technologies, to maximize processing efficiency, operators typically hold the electromagnetic wire by hand. This traditional method has significant drawbacks: firstly, manual holding offers poor stability, and slight hand tremors during welding can easily cause the wire to misalign, leading to defects such as incomplete welds and cracks; secondly, the surface temperature of the electromagnetic wire can reach 800-1200℃ during welding, posing a risk of burns to manual operation in such high temperatures, and prolonged operation may also lead to fatigue and decreased precision, further exacerbating safety hazards and quality fluctuations. Therefore, this invention proposes a fixture for preventing incomplete welds in electromagnetic wire welding to address the aforementioned shortcomings of existing technologies. Summary of the Invention

[0004] The purpose of this invention is to provide a tooling for preventing incomplete soldering in electromagnetic wire welding, so as to solve the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tooling for preventing false welding of electromagnetic wires, comprising a base, a fixed seat and a movable seat respectively provided at both ends of the surface of the base, a corresponding first pressure cap provided on the top of the fixed seat and the movable seat, and a plurality of semi-circular clamping grooves provided on the surfaces of the fixed seat and the first pressure cap facing each other and the surfaces of the movable seat and the first pressure cap facing each other, wherein the diameter values ​​of the plurality of semi-circular clamping grooves increase sequentially. A first locking unit is provided between the fixed seat and the first pressure cover, and between the movable seat and the first pressure cover. A guide groove is provided on the surface of the base. A first guide block is installed at the bottom of the movable seat. The movable seat is slidably connected to the surface of the base through the first guide block and the guide groove. A control unit is provided between the movable seat and the base.

[0006] Furthermore, the first locking unit includes first vertical grooves symmetrically opened on both sides of the fixed seat and the movable seat. First positioning guide plates are fixedly installed on both sides of the bottom of the first cover and slidably connected to the inner wall of the first vertical groove. A first limiting plate is fixedly installed on the side of the inner wall of the first vertical groove away from the first positioning guide plate. First moving grooves are symmetrically opened on both sides of the first cover. A first pressing block is slidably connected to the inner side of the first moving groove. A first pressing spring is fixedly installed between one end of the first pressing block and the inner wall of the first moving groove. The other end of the first pressing block extends to the outside of the first moving groove.

[0007] Furthermore, a first auxiliary plate corresponding to the first limiting plate is fixedly connected to the bottom of the first pressing block. The first auxiliary plate and the first limiting plate are provided with a number of matching first triangular teeth on their opposite sides. The first triangular teeth are arranged in right-angled triangles. When the first auxiliary plate moves downward, the inclined surface of the first triangular teeth on the first auxiliary plate slides downward along the inclined surface of the first triangular teeth on the first limiting plate.

[0008] Furthermore, the control unit includes symmetrically arranged translation slots on both sides of the bottom of the movable seat. A control block is slidably connected to the inner side of the translation slot. A limiting spring is fixedly connected between one end of the control block and the inner wall of the translation slot. The other end of the control block extends to the outside of the translation slot. A control plate is installed at the bottom of the control block. Elongated slots corresponding to the control plate are symmetrically arranged on both sides of the base surface. A number of control slots are equidistantly arranged on the inner wall of the elongated slots along its length. A number of control strips that are adapted to the control slots are fixedly installed on the surface of the control plate.

[0009] Furthermore, the base is provided with an auxiliary welding mechanism, which includes two auxiliary seats that are slidably connected to the surface of the base. The two auxiliary seats are arranged between the fixed seat and the movable seat. A second guide block is fixedly installed at the bottom of the auxiliary seat, and the second guide block is slidably connected to the inner side of the guide groove.

[0010] Furthermore, a second pressure cover is provided on the top of the auxiliary seat. Several straightening semicircular grooves are provided on the surface of the second pressure cover facing the auxiliary seat. The position and specifications of the several straightening semicircular grooves correspond to the semicircular clamping grooves. The inner wall of the semicircular clamping groove is rough, while the inner wall of the straightening semicircular groove is smooth. The groove opening of the straightening semicircular groove is provided with rounded corners.

[0011] Furthermore, a second locking unit is provided between the second pressure cover and the auxiliary seat. The second locking unit includes second vertical grooves symmetrically opened on both sides inside the auxiliary seat. Second positioning guide plates are fixedly installed on both sides of the bottom of the second pressure cover and slidably connected to the inner wall of the second vertical groove. A second limiting plate is fixedly installed on the side of the inner wall of the second vertical groove away from the second positioning guide plate. Second moving grooves are symmetrically opened on both sides of the second pressure cover. A second pressing block is slidably connected to the inner side of the second moving groove. A second pressing spring is fixedly installed between one end of the second pressing block and the inner wall of the second moving groove. The other end of the second pressing block extends to the outside of the second moving groove.

[0012] Furthermore, a second auxiliary plate corresponding to the second limiting plate is fixedly connected to the bottom of the second pressing block. The second auxiliary plate and the second limiting plate are provided with a number of matching second triangular teeth on their opposite sides. The second triangular teeth are arranged in right-angled triangles. When the second auxiliary plate moves downward, the inclined surface of the second triangular teeth on the second auxiliary plate slides downward along the inclined surface of the second triangular teeth on the second limiting plate.

[0013] Furthermore, hooks are symmetrically and rotatably connected to both sides of the movable seat, and hanging blocks adapted to the hooks are fixedly installed on the sides of the fixed seat and the movable seat. When the hook is hung on the hanging block, the fixed seat is in contact with the surface of the corresponding auxiliary seat, and the movable seat is in contact with the surface of the corresponding auxiliary seat.

[0014] Compared with the prior art, the anti-cold solder joint fixture for electromagnetic wire welding provided by the present invention has the following beneficial effects: 1. This anti-cold welding fixture for electromagnetic wire welding, through the cooperation between the movable seat, the fixed seat, the first pressure cover, the control unit, and the first locking unit, can quickly connect and stably clamp the electromagnetic wire during the welding process, making the electromagnetic wire welding process more efficient and stable.

[0015] 2. This anti-cold-weld fixture for electromagnetic wire welding, through the setting of an auxiliary welding mechanism, allows for the straightening of the bent portion of the free end of the electromagnetic wire before welding, thereby making the connection process of the electromagnetic wire more convenient and efficient, and also helping to improve the stability of the welding. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1This is a schematic diagram of the overall structure provided in an embodiment of the present invention; Figure 2 This is a partial cross-sectional view of the base structure provided in an embodiment of the present invention; Figure 3 This is a partial cross-sectional view of the movable seat provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the first limiting plate and the first auxiliary plate in a separated state according to an embodiment of the present invention; Figure 5 This is a partial cross-sectional view of the auxiliary seat provided in an embodiment of the present invention; Figure 6 Provided for embodiments of the present invention Figure 5 Enlarged structural diagram at point A in the middle.

[0018] Explanation of reference numerals in the attached figures: 1. Base; 2. Fixed base; 21. Movable base; 22. First guide block; 23. First pressure cap; 24. Semicircular clamping groove; 25. Guide groove; 3. First positioning guide plate; 31. First limiting plate; 32. First pressing block; 33. First pressing spring; 34. First auxiliary plate; 35. First triangular tooth; 4. Control block; 41. Limiting spring; 42. Control plate; 43. Control slot; 44. Control strip; 5. Auxiliary base; 51. Second guide block; 52. Second pressure cap; 53. Straightening semicircular groove; 6. Second positioning guide plate; 61. Second limiting plate; 62. Second pressing block; 63. Second pressing spring; 64. Second auxiliary plate; 65. Second triangular tooth; 7. Hook; 71. Hanging block. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0020] Example 1: Please see Figures 1-6 A fixture for preventing false welds in electromagnetic wire welding includes a base 1. A fixed seat 2 and a movable seat 21 are respectively provided at both ends of the surface of the base 1. A corresponding first pressure cap 23 is provided on the top of both the fixed seat 2 and the movable seat 21. A plurality of semi-circular clamping grooves 24 are provided on the surfaces of the fixed seat 2 and the first pressure cap 23 facing each other, as well as on the surfaces of the movable seat 21 and the first pressure cap 23 facing each other. The diameter of the plurality of semi-circular clamping grooves 24 increases sequentially, so that the fixture can be used for welding electromagnetic wires of different specifications.

[0021] A first locking unit is provided between the fixed seat 2 and the first pressure cover 23, and between the movable seat 21 and the first pressure cover 23. A guide groove 25 is provided on the surface of the base 1. A first guide block 22 is installed at the bottom of the movable seat 21. The movable seat 21 is slidably connected to the surface of the base 1 through the first guide block 22 and the guide groove 25. A control unit is provided between the movable seat 21 and the base 1.

[0022] In this embodiment, the first locking unit includes first vertical grooves symmetrically formed on both sides of the fixed base 2 and the movable base 21. First positioning guide plates 3 are fixedly installed on both sides of the bottom of the first pressure cover 23 and are slidably connected to the inner wall of the first vertical groove. A first limiting plate 31 is fixedly installed on the side of the inner wall of the first vertical groove away from the first positioning guide plate 3. First moving grooves are symmetrically formed on both sides of the first pressure cover 23. A first pressing block 32 is slidably connected to the inner side of the first moving groove. A first abutment is fixedly installed between one end of the first pressing block 32 and the inner wall of the first moving groove. The compression spring 33 and the other end of the first pressing block 32 extend to the outside of the first moving groove. The bottom of the first pressing block 32 is fixedly connected to a first auxiliary plate 34 corresponding to the first limiting plate 31. The first auxiliary plate 34 and the first limiting plate 31 are provided with a number of matching first triangular teeth 35 on the opposite side surface. The first triangular teeth 35 are arranged in right-angled triangles. When the first auxiliary plate 34 moves downward, the inclined surface of the first triangular teeth 35 on the first auxiliary plate 34 slides downward along the inclined surface of the first triangular teeth 35 on the first limiting plate 31.

[0023] In this embodiment, the control unit includes symmetrically opened translation slots on both sides of the bottom of the movable base 21. A control block 4 is slidably connected to the inner side of the translation slot. A limiting spring 41 is fixedly connected between one end of the control block 4 and the inner wall of the translation slot. The other end of the control block 4 extends to the outside of the translation slot. A control plate 42 is installed at the bottom of the control block 4. Long slots corresponding to the control plate 42 are symmetrically opened on both sides of the surface of the base 1. A plurality of control slots 43 are equidistantly opened on the inner wall of the long slots along its length direction. A plurality of control strips 44 that are adapted to the control slots 43 are fixedly installed on the surface of the control plate 42.

[0024] In use, the operator passes one of the electromagnetic wires to be welded through the semicircular clamping groove 24 on the fixed base 2 and presses down the first pressure cover 23 on the fixed base 2, causing the first auxiliary plate 34 to move downward. This causes the inclined surface of the first triangular tooth 35 on the first auxiliary plate 34 to be squeezed with the inclined surface of the first triangular tooth 35 on the first limiting plate 31. As a result, the first auxiliary plate 34 overcomes the deformation force of the first pressure spring 33 and moves away from the first limiting plate 31, so that the semicircular clamping groove 24 on the first pressure cover 23 can cooperate with the semicircular clamping groove 24 on the fixed base 2 to stably clamp and fix it. Then, by the same operation, another electromagnetic wire to be welded is passed through the semicircular clamping groove 24 on the movable base 21 and stably clamped and fixed by the first pressure cover 23 provided thereon.

[0025] After the electromagnetic wires on the fixed base 2 and the movable base 21 are installed, the operator presses the control blocks 4 on both sides of the movable base 21, causing the control blocks 4 to move and drive the control plate 42 to move. The movement of the control plate 42 causes the control strip 44 to exit from the control slot 43, so that the movement of the movable base 21 is no longer restricted. At this time, the operator can move the movable base 21 to adjust the position of the two electromagnetic wires to be welded, so that the connection stability of the two electromagnetic wires is better.

[0026] Example 2: This embodiment provides a technical solution based on the above embodiments: an auxiliary welding mechanism is provided on the base 1, the auxiliary welding mechanism includes two auxiliary seats 5 slidably connected to the surface of the base 1, the two auxiliary seats 5 are arranged between the fixed seat 2 and the movable seat 21, and a second guide block 51 is fixedly installed at the bottom of the auxiliary seat 5, the second guide block 51 is slidably connected to the inner side of the guide groove 25.

[0027] It should be added that the top of the auxiliary seat 5 is provided with a second pressure cover 52. The second pressure cover 52 and the side surface facing the auxiliary seat 5 are provided with a number of straightening semicircular grooves 53. The position and specifications of the straightening semicircular grooves 53 correspond to the semicircular clamping grooves 24. The inner wall of the semicircular clamping groove 24 is rough, while the inner wall of the straightening semicircular groove 53 is smooth. The groove opening of the straightening semicircular groove 53 is provided with rounded corners, so that the semicircular clamping groove 24 can stably clamp and fix the electromagnetic wire. In addition, the rounded corners of the straightening semicircular groove 53 and the groove opening can guide and straighten the bent end of the electromagnetic wire during the movement, so that the straightened end of the electromagnetic wire can remain straight and facilitate welding.

[0028] In this embodiment, a second locking unit is provided between the second pressure cover 52 and the auxiliary seat 5. The second locking unit includes second vertical grooves symmetrically opened on both sides inside the auxiliary seat 5. Second positioning guide plates 6 are fixedly installed on both sides of the bottom of the second pressure cover 52 and slidably connected to the inner wall of the second vertical groove. A second limiting plate 61 is fixedly installed on the side of the inner wall of the second vertical groove away from the second positioning guide plate 6. Second moving grooves are symmetrically opened on both sides of the second pressure cover 52. A second pressing block 62 is slidably connected to the inner side of the second moving groove. One end of the second pressing block 62 is connected to the inner wall of the second moving groove. A second pressing spring 63 is fixedly installed. The other end of the second pressing block 62 extends to the outside of the second moving groove. A second auxiliary plate 64 corresponding to the second limiting plate 61 is fixedly connected to the bottom of the second pressing block 62. Several matching second triangular teeth 65 are provided on the side surface of the second auxiliary plate 64 facing the second limiting plate 61. The second triangular teeth 65 are arranged in right-angled triangles. When the second auxiliary plate 64 moves downward, the inclined surface of the second triangular teeth 65 on the second auxiliary plate 64 slides downward along the inclined surface of the second triangular teeth 65 on the second limiting plate 61.

[0029] During operation, after the electromagnetic wire is installed, that is, when the electromagnetic wire passes through the semi-circular clamping groove 24 and the straightening semi-circular groove 53 simultaneously, the operator presses down on the second pressure cover 52, so that the second pressure cover 52 fits against the surface of the auxiliary seat 5, so that the upper and lower sets of straightening semi-circular grooves 53 can be pressed against the outside of the electromagnetic wire. Then, the operator pushes the auxiliary seat 5, so that the free end of the electromagnetic wire gradually enters the interior of the straightening semi-circular groove 53 and is pressed and straightened by its inner wall. After one unidirectional movement, the operator presses the second pressing blocks 62 on both sides, so that the second auxiliary plate 64 moves away from the second limiting plate 61, so that the second triangular teeth 65 set on them separate. At this time, the upward movement of the second pressure cover 52 is no longer restricted. The operator lifts the second pressure cover 52 upward and pushes the auxiliary seat 5 in the opposite direction, so that it moves to the corresponding fixed seat 2 or movable seat 21.

[0030] Determine whether the electromagnetic wire needs to be straightened again based on its actual condition after straightening. After straightening is completed and the auxiliary seat 5 is reset, the operator presses down the second pressure cover 52 so that the second pressure cover 52 and the auxiliary seat 5 cooperate to press and fix the electromagnetic wire. Then, the position of the electromagnetic wire is adjusted and welded.

[0031] Example 3: This embodiment provides a technical solution based on the above embodiment: hooks 7 are symmetrically rotatably connected to both sides of the movable seat 21, and hanging blocks 71 adapted to the hooks 7 are fixedly installed on the side of the fixed seat 2 and the movable seat 21. When the hooks 7 are hung on the hanging blocks 71, the fixed seat 2 is in contact with the surface of the corresponding auxiliary seat 5, and the movable seat 21 is in contact with the surface of the corresponding auxiliary seat 5.

[0032] During operation, the hook 7 is hung on the hanging block 71, so that the auxiliary seat 5 can maintain a stable state with the corresponding movable seat 21 and fixed seat 2, thereby making the electromagnetic wire connection more stable during the welding process. Furthermore, when the auxiliary seat 5 is working, by removing the hook 7, the movable seat 21 and fixed seat 2 can maintain a stable state, while the auxiliary seat 5 can move normally to straighten the bent section of the electromagnetic wire.

[0033] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fixture for preventing incomplete soldering in electromagnetic wire welding, characterized in that, Includes a base (1), with a fixed seat (2) and a movable seat (21) respectively provided at both ends of the surface of the base (1). The top of the fixed seat (2) and the movable seat (21) are each provided with a corresponding first pressure cap (23). The surfaces of the fixed seat (2) and the first pressure cap (23) facing each other, as well as the surfaces of the movable seat (21) and the first pressure cap (23) facing each other, are provided with a plurality of semi-circular clamping grooves (24). The diameter values ​​of the plurality of semi-circular clamping grooves (24) increase sequentially. A first locking unit is provided between the fixed seat (2) and the first pressure cover (23) and between the movable seat (21) and the first pressure cover (23). A guide groove (25) is provided on the surface of the base (1). A first guide block (22) is installed at the bottom of the movable seat (21). The movable seat (21) is slidably connected to the surface of the base (1) through the first guide block (22) and the guide groove (25). A control unit is provided between the movable seat (21) and the base (1).

2. The anti-cold solder joint fixture for electromagnetic wire welding according to claim 1, characterized in that, The first locking unit includes a first vertical groove symmetrically opened on both sides of the fixed seat (2) and the movable seat (21). A first positioning guide plate (3) is fixedly installed on both sides of the bottom of the first cover (23) and slidably connected to the inner wall of the first vertical groove. A first limiting plate (31) is fixedly installed on the side of the inner wall of the first vertical groove away from the first positioning guide plate (3). A first moving groove is symmetrically opened on both sides of the first cover (23). A first pressing block (32) is slidably connected to the inner side of the first moving groove. A first pressing spring (33) is fixedly installed between one end of the first pressing block (32) and the inner wall of the first moving groove. The other end of the first pressing block (32) extends to the outside of the first moving groove.

3. The anti-cold solder joint fixture for electromagnetic wire welding according to claim 2, characterized in that, The bottom of the first pressing block (32) is fixedly connected to a first auxiliary plate (34) corresponding to the first limiting plate (31). The first auxiliary plate (34) and the first limiting plate (31) are provided with a number of matching first triangular teeth (35) on the opposite side surface. The first triangular teeth (35) are arranged in right-angled triangles. When the first auxiliary plate (34) moves downward, the inclined surface of the first triangular teeth (35) on the first auxiliary plate (34) slides downward along the inclined surface of the first triangular teeth (35) on the first limiting plate (31).

4. The anti-cold solder joint fixture for electromagnetic wire welding according to claim 3, characterized in that, The control unit includes symmetrically opened translation slots on both sides of the bottom of the movable seat (21). A control block (4) is slidably connected to the inner side of the translation slot. A limiting spring (41) is fixedly connected between one end of the control block (4) and the inner wall of the translation slot. The other end of the control block (4) extends to the outside of the translation slot. A control plate (42) is installed at the bottom of the control block (4). Long slots corresponding to the control plate (42) are symmetrically opened on both sides of the surface of the base (1). Several control slots (43) are equidistantly opened on the inner wall of the long slots along its length direction. Several control strips (44) that are adapted to the control slots (43) are fixedly installed on the surface of the control plate (42).

5. The anti-cold solder joint fixture for electromagnetic wire welding according to claim 4, characterized in that, An auxiliary welding mechanism is provided on the base (1). The auxiliary welding mechanism includes two auxiliary seats (5) that are slidably connected to the surface of the base (1). The two auxiliary seats (5) are located between the fixed seat (2) and the movable seat (21). A second guide block (51) is fixedly installed at the bottom of the auxiliary seat (5). The second guide block (51) is slidably connected to the inner side of the guide groove (25).

6. The anti-cold solder joint fixture for electromagnetic wire welding according to claim 5, characterized in that, The top of the auxiliary seat (5) is provided with a second pressure cover (52). The second pressure cover (52) and the side surface facing the auxiliary seat (5) are provided with a number of straightening semicircular grooves (53). The position and specifications of the number of straightening semicircular grooves (53) are corresponding to the semicircular clamping groove (24). The inner wall of the semicircular clamping groove (24) is rough, while the inner wall of the straightening semicircular groove (53) is smooth. The groove opening of the straightening semicircular groove (53) is provided with rounded corners.

7. The anti-cold solder joint fixture for electromagnetic wire welding according to claim 6, characterized in that, A second locking unit is provided between the second pressure cover (52) and the auxiliary seat (5). The second locking unit includes a second vertical groove symmetrically opened on both sides inside the auxiliary seat (5). A second positioning guide plate (6) is fixedly installed on both sides of the bottom of the second pressure cover (52) and slidably connected to the inner wall of the second vertical groove. A second limiting plate (61) is fixedly installed on the side of the inner wall of the second vertical groove away from the second positioning guide plate (6). A second moving groove is symmetrically opened on both sides of the second pressure cover (52). A second pressing block (62) is slidably connected to the inner side of the second moving groove. A second pressing spring (63) is fixedly installed between one end of the second pressing block (62) and the inner wall of the second moving groove. The other end of the second pressing block (62) extends to the outside of the second moving groove.

8. The anti-cold solder joint fixture for electromagnetic wire welding according to claim 7, characterized in that, The bottom of the second pressing block (62) is fixedly connected to a second auxiliary plate (64) corresponding to the second limiting plate (61). The second auxiliary plate (64) and the second limiting plate (61) are provided with a number of matching second triangular teeth (65) on the opposite side surface. The second triangular teeth (65) are arranged in right-angled triangles. When the second auxiliary plate (64) moves downward, the inclined surface of the second triangular teeth (65) on the second auxiliary plate (64) slides downward along the inclined surface of the second triangular teeth (65) on the second limiting plate (61).

9. The anti-cold solder joint fixture for electromagnetic wire welding according to claim 8, characterized in that, Hooks (7) are symmetrically rotatably connected to both sides of the movable seat (21). The fixed seat (2) and the side of the movable seat (21) are fixedly installed with hanging blocks (71) that are compatible with the hooks (7). When the hooks (7) are hung on the hanging blocks (71), the fixed seat (2) is in contact with the surface of the corresponding auxiliary seat (5), and the movable seat (21) is in contact with the surface of the corresponding auxiliary seat (5).

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