Welding equipment for rotating shaft

Abstract

The utility model discloses welding equipment for a rotating shaft, which belongs to the technical field of welding repair of the rotating shaft, and is characterized in that the welding equipment comprises a rotation adjusting mechanism, a clamping assembly, a supporting assembly, a back plate and a bottom plate, the rotation adjusting mechanism comprises an adjusting assembly and a rotating assembly, and the adjusting assembly can be used for connecting and adjusting the rotating assembly; the rotating assembly can rotate and adjust the rotating shaft according to needs when the rotating shaft is welded and repaired, the rotating assembly is used in cooperation with the adjusting assembly, and the rotating assembly can be adjusted according to the size of the rotating shaft, so that the rotating assembly can limit and support the rotating shafts of different sizes left and right, and the clamping assembly can be used in cooperation with the rotating adjusting mechanism. The rotating shaft can be vertically clamped and limited, the situation that the rotating shaft deviates when the rotating shaft is rotated can be prevented, the supporting assembly can be used in cooperation with the rotation adjusting mechanism when the rotating shaft is welded and repaired, the rotating shaft is supported, and therefore the rotating shaft can be welded and repaired conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of rotating shaft welding repair, in particular to a rotating shaft welding device. Background Art

[0002] A rotating shaft, as the name implies, is a shaft that is required to connect the main parts of a product and is used to withstand both bending and torque during rotation.

[0003] At present, a Chinese utility model with the announcement number of CN209867717U discloses a welding device for a rotating shaft, which is used to weld a rotating shaft and a rib plate together, including a positioner and a lifting platform, wherein the positioner includes a fixed first displacement end and a movably arranged second displacement end, the first displacement end is provided with a first clamping claw for fixing one end of the rotating shaft, and the second displacement end is provided with a second clamping claw for fixing the other end of the rotating shaft; the lifting platform is arranged between the first clamping claw and the second clamping claw, and the lifting platform is provided with a movable fixed plate, the fixed plate is used to fix the rib plate, and the fixed plate is also provided with a plurality of clamping devices for clamping the rib plate and / or the rotating shaft. The rotating shaft welding device of this structure has the advantage of a high degree of automation compared with the rotating shaft welding device of the existing structure. During the welding process, the welded part can be rotated automatically, and together with the welding robot, fully automatic welding of the rotating shaft can be realized.

[0004] In modern society, the use of rotating shafts is becoming more and more widespread and frequent, so the rotating shafts may be worn. Rotating shaft welding equipment is needed to weld and repair the rotating shafts. Most of the existing rotating shafts are cylindrical. In the process of welding and repairing, the rotating shafts are mostly placed on a plane and then manually welded and repaired. However, during the repair process, the shaft needs to be continuously rotated, which will increase the consumption of manpower and reduce the efficiency. In addition, during the rotation of the rotating shaft, it cannot be guaranteed that the rotating shaft will not be offset, which will cause errors in the repair and may cause the repair to fail. Utility Model Content

[0005] The utility model provides a welding device for a rotating shaft, aiming to solve the problem that most of the existing rotating shafts are cylindrical, and in the process of welding repair, the rotating shaft is mostly placed on a plane and then manually welded and repaired. However, during the repair process, the shaft needs to be continuously rotated, which will increase the consumption of manpower and reduce the efficiency. In addition, during the rotation of the rotating shaft, it cannot be guaranteed that the rotating shaft will not be offset, which will cause errors in the repair and may cause the repair to fail.

[0006] The utility model is implemented as follows: a welding device for a rotating shaft comprises a rotation adjustment mechanism, a clamping assembly, a support assembly, a back plate and a bottom plate, wherein the rotation adjustment mechanism is arranged at the rear side of the top of the bottom plate, the clamping assembly is arranged at the front side of the back plate, the support assembly is arranged at the front side of the top of the bottom plate, and the back plate is welded to the rear side of the top of the bottom plate;

[0007] The rotation adjustment mechanism comprises an adjustment component and a rotation component. The adjustment component is arranged on the rear side of the top of the bottom plate, and the rotation component is arranged inside the adjustment component.

[0008] In order to enable the adjustment component to achieve the effect of connecting and adjusting the rotating component, as a preferred welding device for a rotating shaft of the utility model, the adjustment component includes a first connecting groove, an adjustment groove, a guide block and a connecting box, the first connecting groove is opened on the rear side of the connecting box, the adjustment groove is opened on the front side of the connecting box, the guide block is fixedly connected to the top of the front side of the connecting box, and the connecting box is fixedly connected to the rear side of the top of the base plate.

[0009] In order to enable the rotating assembly to achieve the effect of supporting the rotating shaft, the rotating assembly can achieve the effect of rotating and adjusting the rotating shaft as required when the rotating shaft is welded and repaired, and the rotating assembly is used in conjunction with the adjusting assembly to achieve the effect of adjusting the rotating assembly according to the size of the rotating shaft, so that the rotating assembly can achieve the effect of left and right limiting and supporting rotating shafts of different sizes. As a preferred welding equipment for a rotating shaft of the utility model, the rotating assembly includes a connecting column, a transmission rod, a rotating rod, a rotating column, a connecting cylinder and an adjusting block, the connecting column is slidably connected to the inside of a first connecting groove, the transmission rod is fixedly connected to the rear side of the rotating rod, the rotating rod is rotatably connected to the inner wall of the connecting column, the rotating column is fixedly connected to the surface of the rotating rod, the connecting cylinder is rotatably connected to the front side of the rotating rod, the front side of the connecting cylinder is fixedly connected to the rear side of the adjusting block, and the adjusting block is slidably connected to the inside of the adjusting groove.

[0010] In order to enable the clamping assembly to cooperate with the rotation adjustment mechanism and achieve the effect of clamping and limiting the rotating shaft up and down, thereby preventing the rotating shaft from being offset when the rotating shaft is rotated, as a preferred welding equipment for the rotating shaft of the utility model, the clamping assembly includes a rotating drum, a limiting plate, a fixed column, a connecting plate, an adjustment seat and a guide space, the rotating drum is rotatably connected to the surface of the fixed column, the limiting plate is fixedly connected to the front side of the fixed column, the fixed column is fixedly connected to the front side of the connecting plate, the connecting plate is fixedly connected to the front side of the adjustment seat, the adjustment seat is movably connected to the inside of the guide space, and the guide space is opened on the front side of the back plate.

[0011] In order to enable the support assembly to cooperate with the rotation adjustment mechanism when welding and repairing the shaft to support the shaft, thereby facilitating welding and repairing the shaft, a preferred welding device for the shaft of the utility model includes a support plate, an electric telescopic rod, a base, a slider and a slide groove, the support plate is fixedly connected to the top of the electric telescopic rod, the electric telescopic rod is fixedly connected to the top of the base, the base is fixedly connected to the top of the slider, the slider is slidably connected to the inside of the slide groove, and the slide groove is opened on the front side of the top of the bottom plate.

[0012] In order to enable the rotating motor to provide rotating power for the transmission rod, and to enable the fixed block to fix and support the rotating motor, thereby preventing the rotating motor from being unable to provide power to the transmission rod due to the lack of a support, and at the same time making the motor more stable during operation, the limit block can be provided so that the limit block can play the role of limiting and adjusting the fixed block. As a preferred welding device for a rotating shaft of the utility model, the rear side of the transmission rod is fixedly connected to the rotating motor, the bottom of the rotating motor is fixedly connected to the fixed block, the front side of the fixed block is fixedly connected to the limit block, and the limit block is slidably connected to the rear side of the back plate.

[0013] In order to make the limiting groove achieve the effect of sliding connection with the limiting block, as a preferred welding device for a rotating shaft of the utility model, a limiting groove is opened at the bottom of the rear side of the back plate, and the interior of the limiting groove is slidingly connected with the surface of the limiting block.

[0014] In order to enable the second connecting groove to achieve the effect of sliding connection with the connecting column, as a preferred welding device for a rotating shaft of the utility model, a second connecting groove is opened on the rear side of the back plate, and the interior of the second connecting groove is slidingly connected to the surface of the connecting column.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The welding equipment for the rotating shaft is provided with a rotation adjustment mechanism, and the rotation adjustment mechanism includes an adjustment component and a rotation component. Through the provision of the adjustment component, the adjustment component can achieve the effect of connecting and adjusting the rotation component. Through the provision of the rotation component, the rotation component can achieve the effect of supporting the rotating shaft. At the same time, the rotation component can achieve the effect of rotationally adjusting the rotating shaft as required when welding and repairing the rotating shaft. The rotation component is used in conjunction with the adjustment component, and can play the effect of adjusting the rotating component according to the size of the rotating shaft, so that the rotating component can achieve the effect of left and right limiting and supporting rotating shafts of different sizes. Through the provision of the clamping component, the clamping component can be used in conjunction with the rotation adjustment mechanism to achieve the effect of clamping and limiting the rotating shaft up and down, thereby preventing the rotating shaft from being offset when rotating the rotating shaft. Through the provision of the support component, the support component can be used in conjunction with the rotation adjustment mechanism when welding and repairing the rotating shaft to support the rotating shaft, thereby achieving the effect of facilitating welding and repairing the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the overall structure diagram of the welding equipment for the rotating shaft of the utility model;

[0018] Figure 2 It is a connection diagram of the support assembly in the utility model;

[0019] Figure 3 It is a connection diagram of the adjustment component and the rotating component in the utility model;

[0020] Figure 4 This is a schematic diagram of the connection of the rear side of the back plate in the utility model;

[0021] Figure 5 It is a connection schematic diagram of the clamping assembly in the utility model.

[0022] In the figure, 1. rotating adjustment mechanism; 101. adjusting component; 1011. first connecting groove; 1012. adjusting groove; 1013. guide block; 1014. connecting box; 102. rotating component; 1021. connecting column; 1022. transmission rod; 1023. rotating rod; 1024. rotating column; 1025. connecting cylinder; 1026. adjusting block; 2. clamping component; 201. rotating cylinder; 202. limiting plate; 203. fixing column; 204. connecting plate; 205. adjusting seat; 206. guiding space; 3. supporting component; 301. supporting plate; 302. electric telescopic rod; 303. base; 304. slider; 305. slide groove; 4. back plate; 5. bottom plate; 6. rotating motor; 7. fixing block; 8. limiting block; 9. limiting groove; 10. second connecting groove. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0025] See also Figure 1-5 The utility model provides a technical solution: a welding device for a rotating shaft, comprising a rotation adjustment mechanism 1, a clamping assembly 2, a support assembly 3, a back plate 4 and a bottom plate 5, wherein the rotation adjustment mechanism 1 is arranged at the rear side of the top of the bottom plate 5, the clamping assembly 2 is arranged at the front side of the back plate 4, the support assembly 3 is arranged at the front side of the top of the bottom plate 5, and the back plate 4 is welded to the rear side of the top of the bottom plate 5;

[0026] The rotation adjustment mechanism 1 includes an adjustment component 101 and a rotation component 102 . The adjustment component 101 is arranged at the rear side of the top of the bottom plate 5 , and the rotation component 102 is arranged inside the adjustment component 101 .

[0027] In this embodiment: through the setting of the rotation adjustment mechanism 1, the rotation adjustment mechanism 1 includes an adjustment component 101 and a rotation component 102. Through the setting of the adjustment component 101, the adjustment component 101 can achieve the effect of connecting and adjusting the rotation component 102. Through the setting of the rotation component 102, the rotation component 102 can achieve the effect of supporting the rotating shaft. At the same time, the rotation component 102 can achieve the effect of rotating and adjusting the rotating shaft as required when welding and repairing the rotating shaft. The rotation component 102 is used in conjunction with the adjustment component 101, which can play a role in adjusting the rotation shaft according to the size of the rotating shaft. The effect of adjusting the rotating component 102 is that the rotating component 102 can achieve the effect of limiting and supporting the rotating shafts of different sizes to the left and right. Through the setting of the clamping component 2, the clamping component 2 can be used in conjunction with the rotating adjustment mechanism 1 to achieve the effect of clamping and limiting the rotating shaft up and down, thereby preventing the rotating shaft from being offset when the rotating shaft is rotated. Through the setting of the supporting component 3, the supporting component 3 can be used in conjunction with the rotating adjustment mechanism 1 when welding and repairing the rotating shaft to support the rotating shaft, thereby achieving the effect of facilitating welding and repairing the rotating shaft.

[0028] As a technical optimization solution of the utility model, the adjustment component 101 includes a first connecting groove 1011, an adjustment groove 1012, a guide block 1013 and a connecting box 1014. The first connecting groove 1011 is opened on the rear side of the connecting box 1014, the adjustment groove 1012 is opened on the front side of the connecting box 1014, the guide block 1013 is fixedly connected to the top of the front side of the connecting box 1014, and the connecting box 1014 is fixedly connected to the rear side of the top of the base plate 5.

[0029] In this embodiment: through the setting of the first connecting groove 1011, the first connecting groove 1011 can achieve the effect of sliding connection of the connecting column 1021, through the setting of the adjusting groove 1012, the adjusting groove 1012 can achieve the effect of providing connection conditions for the rotating rod 1023 and the connecting tube 1025, through the setting of the guide block 1013, a guide rail is provided on the rear side of the guide block 1013, so that the adjustment block 1026 can be adjusted left and right, and through the setting of the connecting box 1014, the connecting box 1014 can have the effect of fixedly connecting the guide block 1013.

[0030] As a technical optimization scheme of the utility model, the rotating component 102 includes a connecting column 1021, a transmission rod 1022, a rotating rod 1023, a rotating column 1024, a connecting tube 1025 and an adjusting block 1026. The connecting column 1021 is slidably connected to the inside of the first connecting groove 1011, the transmission rod 1022 is fixedly connected to the rear side of the rotating rod 1023, the rotating rod 1023 is rotatably connected to the inner wall of the connecting column 1021, the rotating column 1024 is fixedly connected to the surface of the rotating rod 1023, the connecting tube 1025 is rotatably connected to the front side of the rotating rod 1023, the front side of the connecting tube 1025 is fixedly connected to the rear side of the adjusting block 1026, and the adjusting block 1026 is slidably connected to the inside of the adjusting groove 1012.

[0031] In this embodiment: by setting the connecting column 1021, the connecting column 1021 can achieve the effect of rotationally connecting the rotating rod 1023; by setting the transmission rod 1022, the transmission rod 1022 can achieve the effect of connecting to the rotating motor 6; by setting the rotating rod 1023, the rotating rod 1023 can achieve the effect of fixedly connecting the rotating column 1024; by setting the rotating column 1024, the rotating column 1024 can achieve the effect of rotationally adjusting the rotating shaft; by setting the connecting tube 1025, the connecting tube 1025 can achieve the effect of rotationally connecting the rotating rod 1023; by setting the adjusting block 1026, the adjusting block 1026 can achieve the effect of movably connecting the guide block 1013.

[0032] As a technical optimization solution of the utility model, the clamping assembly 2 includes a rotating drum 201, a limiting plate 202, a fixed column 203, a connecting plate 204, an adjusting seat 205 and a guide space 206. The rotating drum 201 is rotatably connected to the surface of the fixed column 203, the limiting plate 202 is fixedly connected to the front side of the fixed column 203, the fixed column 203 is fixedly connected to the front side of the connecting plate 204, the connecting plate 204 is fixedly connected to the front side of the adjusting seat 205, the adjusting seat 205 is movably connected to the inside of the guide space 206, and the guide space 206 is opened on the front side of the back plate 4.

[0033] In this embodiment: by setting the rotating drum 201, the rotating drum 201 is used in conjunction with the rotating column 1024, so as to achieve the effect of clamping and limiting the rotating shaft; by setting the limiting plate 202, the limiting plate 202 is used in conjunction with the connecting plate 204, so that the rotational connection between the rotating drum 201 and the fixed column 203 can obtain the effect of limiting; by setting the adjusting seat 205, the adjusting seat 205 can achieve the effect of connecting and supporting the connecting plate 204; by setting the guide space 206, the guide space 206 is an existing device that can connect and adjust the adjusting seat 205.

[0034] As a technical optimization solution of the utility model, the support assembly 3 includes a support plate 301, an electric telescopic rod 302, a base 303, a slider 304 and a slide groove 305. The support plate 301 is fixedly connected to the top of the electric telescopic rod 302, the electric telescopic rod 302 is fixedly connected to the top of the base 303, the base 303 is fixedly connected to the top of the slider 304, the slider 304 is slidably connected to the inside of the slide groove 305, and the slide groove 305 is opened on the front side of the top of the bottom plate 5.

[0035] In this embodiment: by setting the support plate 301, the support plate 301 can achieve the effect of supporting the rotating shaft; by setting the electric telescopic rod 302, the electric telescopic rod 302 can achieve the effect of adjusting the support plate 301 up and down; by setting the base 303, the base 303 can achieve the effect of connecting and supporting the electric telescopic rod 302; by setting the slider 304, the slider 304 can achieve the effect of connecting the base 303; by setting the slide groove 305, the slide groove 305 can achieve the effect of sliding connection with the slider 304.

[0036] As a technical optimization solution of the utility model, the rear side of the transmission rod 1022 is fixedly connected to a rotating motor 6, the bottom of the rotating motor 6 is fixedly connected to a fixed block 7, the front side of the fixed block 7 is fixedly connected to a limiting block 8, and the limiting block 8 is slidably connected to the rear side of the back plate 4.

[0037] In this embodiment: by setting the rotating motor 6, the rotating motor 6 can provide rotational power for the transmission rod 1022, and by setting the fixed block 7, the fixed block 7 can achieve the effect of fixedly supporting the rotating motor 6, thereby preventing the rotating motor 6 from being unable to provide power to the transmission rod 1022 due to the lack of a support, and at the same time making the motor more stable during operation, and by setting the limit block 8, the limit block 8 can achieve the effect of limiting the fixed block 7.

[0038] As a technical optimization solution of the utility model, a limiting groove 9 is provided at the bottom of the rear side of the back plate 4 , and the interior of the limiting groove 9 is slidably connected to the surface of the limiting block 8 .

[0039] In this embodiment, by providing the limiting groove 9 , the limiting groove 9 can achieve the effect of sliding connection with the limiting block 8 .

[0040] As a technical optimization solution of the present invention, a second connection groove 10 is opened on the rear side of the back plate 4 , and the interior of the second connection groove 10 is slidably connected to the surface of the connection column 1021 .

[0041] In this embodiment, by providing the second connection groove 10 , the second connection groove 10 can achieve the effect of sliding connection with the connection column 1021 .

[0042] Working principle: First, when welding and repairing the rotating shaft, place the thicker rotating end on the top of the connecting box 1014, and then use the guide block 1013 to adjust the adjusting block 1026, so that the adjusting block 1026 drives the connecting cylinder 1025 and the rotating rod 1023, thereby adjusting the rotating column 1024, so that the rotating column 1024 clamps the rotating shaft, thereby supporting the rotating shaft from the top of the connecting box 1014, and being located at the top between the two rotating columns 1024, and then adjust the rotating cylinder 201 through the guide space 206, so that the bottom of the rotating cylinder 201 contacts the top of the rotating shaft, and then open the electric telescopic rod 302 to adjust the support plate 301, so that the support plate 301 is on the rotating shaft. The other end of the shaft is adjusted so that the shaft is flush with the base plate 5, and then the surface of the shaft can be repaired. When the shaft needs to be rotated, the rotating motor 6 is turned on so that the rotating motor 6 provides rotational power for the transmission rod 1022, so that the transmission rod 1022 drives the rotating rod 1023 to rotate, so that the rotating rod 1023 drives the rotating column 1024 to rotate, so that the shaft can be rotated in coordination with the limit of the rotating drum 201. When the rotating motor 6 is turned on, two rotating motors 6 are required to apply opposite forces to the two transmission rods 1022. After the rotation of the shaft is adjusted, the welding repair work can be continued until the shaft is removed after the repair is completed.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding device for a rotating shaft, comprising a rotation adjustment mechanism (1), a clamping assembly (2), a supporting assembly (3), a back plate (4) and a bottom plate (5), characterized in that: The rotation adjustment mechanism (1) is arranged on the rear side of the top of the bottom plate (5), the clamping assembly (2) is arranged on the front side of the back plate (4), the supporting assembly (3) is arranged on the front side of the top of the bottom plate (5), and the back plate (4) is welded to the rear side of the top of the bottom plate (5); The rotation adjustment mechanism (1) comprises an adjustment component (101) and a rotation component (102), wherein the adjustment component (101) is arranged on the rear side of the top of the bottom plate (5), and the rotation component (102) is arranged inside the adjustment component (101).

2. A rotating shaft welding device according to claim 1, characterized in that: The adjustment component (101) comprises a first connection groove (1011), an adjustment groove (1012), a guide block (1013) and a connection box (1014); the first connection groove (1011) is provided on the rear side of the connection box (1014); the adjustment groove (1012) is provided on the front side of the connection box (1014); the guide block (1013) is fixedly connected to the top of the front side of the connection box (1014); and the connection box (1014) is fixedly connected to the rear side of the top of the bottom plate (5).

3. The rotating shaft welding device according to claim 1, characterized in that: The rotating assembly (102) comprises a connecting column (1021), a transmission rod (1022), a rotating rod (1023), a rotating column (1024), a connecting tube (1025) and an adjusting block (1026); the connecting column (1021) is slidably connected to the inside of the first connecting groove (1011); the transmission rod (1022) is fixedly connected to the rear side of the rotating rod (1023); the rotating rod (1023) is rotatably connected to the inner wall of the connecting column (1021); the rotating column (1024) is fixedly connected to the surface of the rotating rod (1023); the connecting tube (1025) is rotatably connected to the front side of the rotating rod (1023); the front side of the connecting tube (1025) is fixedly connected to the rear side of the adjusting block (1026); and the adjusting block (1026) is slidably connected to the inside of the adjusting groove (1012).

4. The rotating shaft welding device according to claim 1, characterized in that: The clamping assembly (2) comprises a rotating drum (201), a limiting plate (202), a fixed column (203), a connecting plate (204), an adjusting seat (205) and a guiding space (206); the rotating drum (201) is rotatably connected to the surface of the fixed column (203); the limiting plate (202) is fixedly connected to the front side of the fixed column (203); the fixed column (203) is fixedly connected to the front side of the connecting plate (204); the connecting plate (204) is fixedly connected to the front side of the adjusting seat (205); the adjusting seat (205) is movably connected to the inside of the guiding space (206); and the guiding space (206) is opened on the front side of the back plate (4).

5. The rotating shaft welding device according to claim 1, characterized in that: The support assembly (3) comprises a support plate (301), an electric telescopic rod (302), a base (303), a slider (304) and a slide groove (305); the support plate (301) is fixedly connected to the top of the electric telescopic rod (302); the electric telescopic rod (302) is fixedly connected to the top of the base (303); the base (303) is fixedly connected to the top of the slider (304); the slider (304) is slidably connected to the inside of the slide groove (305); and the slide groove (305) is opened on the front side of the top of the bottom plate (5).

6. The rotating shaft welding device according to claim 3, characterized in that: The rear side of the transmission rod (1022) is fixedly connected to a rotating motor (6), the bottom of the rotating motor (6) is fixedly connected to a fixing block (7), the front side of the fixing block (7) is fixedly connected to a limiting block (8), and the limiting block (8) is slidably connected to the rear side of the back plate (4).

7. A rotating shaft welding device according to claim 6, characterized in that: A limiting groove (9) is provided at the bottom of the rear side of the back plate (4), and the interior of the limiting groove (9) is slidably connected to the surface of the limiting block (8).

8. The rotating shaft welding device according to claim 3, characterized in that: A second connection groove (10) is provided on the rear side of the back plate (4), and the interior of the second connection groove (10) is slidably connected to the surface of the connection column (1021).

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