Welding tool for community fitness equipment

Abstract

The invention provides a community fitness equipment welding tool, which belongs to the technical field of fitness equipment production, and comprises a base, and a first polishing mechanism and a second polishing mechanism which are mounted on the base. The first grinding mechanism is used for polishing or grinding a large-area area of the fitness equipment, and the second grinding mechanism is used for polishing or grinding a small-area area, where the first grinding mechanism is inconvenient to work, on the fitness equipment. The first grinding mechanism comprises a rotating roller fixedly welded to a first support and rotationally installed on the first support, a first adjusting assembly installed on the circumferential face of the first rotating roller, a first air cushion installed on the first adjusting assembly, a grinding tool fixed to the side face of the first air cushion and a first motor installed on the first support. The first air cushion deforms correspondingly according to the pressure distribution condition, so that the shapes of the first air cushion and the grinding tool are matched with the shape of the workpiece, the grinding tool is more attached to the surface of the workpiece when the workpiece is polished or ground, and the polishing or grinding effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fitness equipment production. More specifically, it relates to a welding fixture for community fitness equipment. Background Art

[0002] Fitness exercise is an important way for modern people to improve physical fitness and shape body postures. Its core goals include muscle strengthening, improvement of cardiopulmonary function, and prevention of sports injuries. Fitness equipment, as the carrier of exercise, can be classified into single-function equipment (such as treadmills, rowing machines) and multi-function equipment (such as squat racks, bench presses) according to functions. These equipment are usually made of metal alloys, engineering plastics, and composite materials, and need to have both structural strength and ergonomic characteristics. In the production process of fitness equipment, welding is a key link to ensure the function, safety, and aesthetics of the product. To ensure the welding quality, it is necessary to polish and grind the welded joints. Taking metal parts as an example, barbell rods, handles, etc. need to be polished to remove burrs and oxide layers to avoid skin abrasions or equipment jams caused by rough surfaces during exercise; the surfaces of plastics and composite materials need to be ground to be smooth to reduce the impact of frictional resistance on the smoothness of movement. In addition, inadequately polished equipment is prone to residual stress concentration points, which may cause cracks or fractures after long-term use. Polishing can not only form a uniform protective layer to delay metal corrosion and plastic aging, but also improve the product texture through a highly polished surface, meeting consumers' appearance requirements for high-end fitness equipment.

[0003] Currently, the polishing and grinding of fitness equipment mainly rely on two types of equipment: fixed grinding machines and multi-axis linkage devices. The fixed grinding machine fixes the workpiece through a hydraulic-driven fixture and performs linear grinding with a rotating grinding wheel or brush, which is suitable for regularly shaped parts (such as barbell rods); the multi-axis linkage device adjusts the angle of the grinding disc using adjustable hydraulic columns and rotating shafts, and can adapt to some irregular curved surfaces (such as the arc of the handle). The typical process flow includes rough grinding (removing burrs), fine grinding (refining the texture), and polishing (enhancing the gloss), and a dust suction device is required throughout the process to control dust pollution. However, the existing equipment has significant defects in application: First, most equipment relies on grinding wheels or brushes of fixed sizes and cannot adjust the shape of the contact surface according to the local curvature of the equipment (such as the grooves of the handle, the edges of the joints), resulting in uneven distribution of grinding pressure and easy generation of untreated areas; Second, the existing auxiliary structures (such as slider limit frames) are mostly rigid supports and cannot adjust synchronously with the deformation of the equipment during the grinding process, exacerbating the grinding differences between the edge area and the central area. Summary of the Invention

[0004] The purpose of the present invention is to provide a welding fixture for community fitness equipment, aiming to solve the problem that the polishing and grinding equipment in the prior art cannot adjust the shape of the grinding tool according to the shape of the workpiece.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a welding tooling for community fitness equipment, including a base; a first grinding mechanism arranged on the base; the first grinding mechanism has a grinding tool for polishing or grinding a workpiece, a rotating roller for mounting the grinding tool, and a first air cushion arranged between the rotating roller and the grinding tool; the grinding tool, the rotating roller and the first air cushion are fixedly connected; when polishing or grinding the workpiece, under the action of pressure, the first air cushion will deform, so that the grinding tool adapts to the shape of the workpiece.

[0006] In a possible implementation manner, the first grinding mechanism includes: a first bracket mounted on the base, a first motor mounted on the first bracket, the rotating roller is rotatably connected to the first bracket, the rotating roller is coaxially arranged and fixedly connected with the power output shaft of the first motor, and the first motor is used to drive the rotating roller to rotate so as to drive the grinding tool to polish or grind the workpiece.

[0007] In a possible implementation manner, the first bracket includes mounting ears fixedly connected to the mounting member, there are two mounting ears, a distance is provided between the two mounting ears, the rotating roller is arranged between the two mounting ears, and both ends of the rotating roller are rotatably connected to the two mounting ears respectively, and the first motor is fixedly connected to the mounting ears.

[0008] In a possible implementation manner, the first grinding mechanism further includes a first adjustment component, which is arranged between the first air cushion and the rotating roller, there are multiple first adjustment components and they are evenly distributed along the axial direction of the rotating roller, the first adjustment component has an annular airbag arranged between the rotating roller and the first air cushion, the annular airbag can expand, and the annular airbag is used to adjust the distance between part of the first air cushion and the rotating roller, so as to adjust the shape of the grinding tool.

[0009] In a possible implementation manner, the first adjustment component includes a fixing member fixedly connected to the circumferential surface of the rotating roller, a chamber for mounting the annular airbag is arranged on the fixing member, a part of the annular airbag is fixedly connected to the fixing member, a part of the annular airbag is fixedly connected to the first air cushion, when the annular airbag contracts or expands, it drives part of the first air cushion to bulge, so as to adjust the distance between part of the first air cushion and the rotating roller.

[0010] In a possible implementation, it further includes a second grinding mechanism which is installed on the base. The second grinding mechanism has a grinding disc for polishing or grinding a workpiece, a turntable for mounting the grinding disc, and a second air cushion disposed between the turntable and the grinding disc. When polishing or grinding the workpiece, under the action of pressure, the second air cushion will deform, so that the grinding disc adapts to the shape of the workpiece.

[0011] In a possible implementation, the second grinding mechanism includes a second bracket installed on the base, and a second motor installed on the second bracket. The power output shaft of the second motor is coaxially arranged and fixedly connected with the turntable. The second motor is used to drive the turntable to rotate, so as to drive the grinding disc to polish or grind the workpiece.

[0012] In a possible implementation, the second grinding mechanism further includes a second adjusting component which is disposed between the second air cushion and the turntable. The second adjusting component is used to adjust the distance between part of the second air cushion and the turntable, so as to adjust the shape of the grinding disc.

[0013] In a possible implementation, a plurality of second adjusting components are provided and are perpendicular to the turntable. The second adjusting component includes a fixed tube fixedly connected to the side surface of the turntable, a piston rod fixedly connected to the side surface of the second air cushion, and a columnar airbag disposed inside the fixed tube. The piston rod is inserted into the fixed tube. One end of the columnar airbag is fixedly connected to the fixed tube, and the other end is fixedly connected to the piston rod.

[0014] In a possible implementation, both the turntable and the second motor are disposed on the top of the second bracket and are perpendicular to the second bracket.

[0015] The welding tool for community fitness equipment provided by the present invention has the following beneficial effects: Compared with the prior art, when the welding tool for community fitness equipment of the present invention performs polishing or grinding work, there is a large pressure between the workpiece and the first grinding mechanism. Since there are differences in the shape between the workpiece and the grinding tool, different positions of the grinding tool bear different pressures. The first air cushion will deform accordingly according to the pressure distribution, so that the shapes of the first air cushion and the grinding tool adapt to the shape of the workpiece. When polishing or grinding the workpiece, the grinding tool fits more closely to the surface of the workpiece, improving the polishing or grinding effect. Description of the Drawings

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the attached drawings required for use in the embodiments or the description of the prior art. Obviously, the attached drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other attached drawings can also be obtained based on these attached drawings.

[0017] Figure 1 Structural schematic diagram of the welding tooling for community fitness equipment provided by the embodiment of the present invention; Figure 2 Structural schematic diagram of the first grinding mechanism provided by the embodiment of the present invention; Figure 3 Structural schematic diagram of the rotating roller, the first adjustment assembly, the first air cushion and the grinding tool provided by the embodiment of the present invention; Figure 4 Structural schematic diagram of the first adjustment assembly and the rotating roller provided by the embodiment of the present invention; Figure 5 Structural schematic diagram of the first adjustment assembly provided by the embodiment of the present invention; Figure 6 Structural schematic diagram of the second grinding mechanism provided by the embodiment of the present invention; Figure 7 Structural schematic diagram of the turntable, the second adjustment assembly, the second air cushion and the grinding disc provided by the embodiment of the present invention; Figure 8 Cross-sectional schematic diagram of the second adjustment assembly provided by the embodiment of the present invention. Description of the drawings: 1. Base; 2. First grinding mechanism; 21. First bracket; 211. Mounting ear; 22. Rotating roller; 23. First air cushion; 24. Grinding tool; 25. First motor; 26. First adjustment assembly; 261. Fixed part; 262. Annular airbag; 3. Second grinding mechanism; 31. Second bracket; 32. Turntable; 33. Second air cushion; 34. Grinding disc; 35. Second motor; 36. Second adjustment assembly; 361. Fixed tube; 362. Piston rod; 363. Columnar airbag. Detailed implementation manners

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention will be further described in detail below with reference to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] Refer to Figures 1 to 8 , and now a welding tooling for community fitness equipment provided by the present invention will be described.

[0021] Refer to Figure 1 ,Figure 2 , Figure 3 and Figure 4 , a welding tool for community fitness equipment provided by an embodiment of the present invention includes a base 1, a first grinding mechanism 2 and a second grinding mechanism 3 mounted on the base 1. The first grinding mechanism 2 is used for polishing or grinding a relatively large area of the fitness equipment, and the second grinding mechanism 3 is used for polishing or grinding a relatively small area of the fitness equipment and an area where the first grinding mechanism 2 is inconvenient to work.

[0022] The first grinding mechanism 2 includes a first bracket 21 fixedly welded, a roller 22 rotatably mounted on the first bracket 21, a first adjustment assembly 26 mounted on the circumferential surface of the first roller 22, a first air cushion 23 mounted on the first adjustment assembly 26, a grinding tool 24 fixed to the side of the first air cushion 23, and a first motor 25 mounted on the first bracket 21.

[0023] The first air cushion 23 is filled with air. Under the action of pressure, the air cushion can be deformed, so as to change the shape of the grinding tool 24, making the shape of the grinding tool 24 more conform to the shape of the workpiece to be ground. The first adjustment assembly 26 is annular and provided with a plurality of them. The first adjustment assemblies 26 are evenly distributed along the axial direction of the roller 22. The diameter of the first adjustment assembly 26 can be adjusted to adjust the distance between part of the grinding tool 24 and the roller 22, so as to adjust the shape of the grinding tool 24, and thus make the shape of the mold more conform to the shape of the workpiece to be ground.

[0024] When grinding or polishing the fitness equipment, if the shape of the grinding or polishing area is similar to the shape of the grinding tool 24, under the action of pressure, the first air cushion 23 is deformed during grinding or polishing, so as to adjust the shape of the grinding tool 24, making the shape of the grinding tool 24 adapt to the shape of the polishing or grinding area. If the shape of the grinding or polishing area differs greatly from the shape of the grinding tool 24, the distance between part of the mold and the roller 22 is adjusted through the first adjustment assembly 26, so as to adjust the shape of the mold. Since the elasticity of the grinding tool 24 is poor, when the first adjustment assembly 26 adjusts the shape of the mold, there is a large tensile stress between the grinding tool 24 and the first adjustment assembly 26. Subsequently, under the action of the tensile stress, the first air cushion 23 is deformed, so as to prevent the first adjustment assembly 26 and the grinding tool 24 from being damaged by the tensile stress.

[0025] The first bracket 21 includes two oppositely arranged mounting ears 211. Both mounting ears 211 are welded to the base 1, and a spacing for mounting the roller 22 is provided between the two mounting ears 211. A rotating hole is formed in the mounting ear 211. The two ends of the roller 22 are provided with rotating shafts. The roller 22 is mounted between the two mounting ears 211 through the rotating shafts and can rotate along the axis of the rotating shaft. The first motor 25 is mounted on one mounting ear 211, and the power output shaft of the first motor 25 is fixedly connected to the rotating shaft. When grinding or polishing fitness equipment, the first motor 25 drives the roller 22 to rotate through the power output shaft and the rotating shaft, so as to grind or polish the fitness equipment.

[0026] Referring to Figure 5 , the first adjusting assembly 26 includes a fixing member 261 fixedly connected to the circumferential surface of the roller 22 and an annular airbag 262 installed inside the fixing member 261. A mounting hole is formed at the central position of the fixing member 261. The fixing member 261 is sleeved and fixed on the side surface of the roller 22 through the mounting hole. An annular mounting groove is formed on the side surface of the fixing member 261 to form a chamber for mounting the annular airbag 262. The annular airbag 262 is installed in the mounting groove, and the annular airbag 262 is connected to an external air source. When the first adjusting assembly 26 adjusts the shape of the grinding tool 24, the external air source inflates the annular airbag 262, increasing the pressure inside the annular airbag 262, causing the annular airbag 262 to expand, thereby increasing the distance between part of the grinding tool 24 and the roller 22, so as to change the shape of the grinding tool 24, so that the shape of the mold is adapted to the shape of the polishing or grinding area.

[0027] Referring to Figure 6 and Figure 7, the second grinding mechanism 3 includes a second bracket 31 welded to the base 1, a turntable 32 mounted on the second bracket 31, a second adjustment assembly 36 mounted on the turntable 32, a second air cushion 33 mounted on the second adjustment assembly 36, a grinding disc 34 mounted on the second air cushion 33, and a second motor 35 mounted on the second bracket 31. The second motor 35 and the turntable 32 are respectively arranged on both sides of the second bracket 31, and the power output shaft of the second motor 35 is coaxial with and fixedly connected to the turntable 32. When using the second grinding mechanism 3 to polish or grind fitness equipment, if the shape of the grinding disc 34 is similar to the shape of the grinding or polishing area, the second air cushion 33 will be deformed by the pressure generated during grinding, so as to change the shape of the grinding disc 34 and make the grinding disc 34 better fit the grinding or polishing area. If the shape of the grinding disc 34 is quite different from the shape of the grinding or polishing area, the distance between part of the grinding disc 34 and the turntable 32 is adjusted through the second adjustment mechanism to adjust the shape of the grinding disc 34. Since the grinding disc 34 has poor elasticity, a large tensile stress will be generated between the grinding disc 34 and the second adjustment assembly 36. Under the action of the tensile stress, the second air cushion 33 undergoes adaptive deformation, so as to avoid damaging the grinding disc 34 or the second adjustment assembly 36 due to the tensile stress when adjusting the shape of the grinding disc 34.

[0028] The shape of the second bracket 31 is set to be the same as the shape of the mounting ear 211 in the first bracket 21, and a mounting tube is provided at the top of the second bracket 31. The second motor 35 is mounted on the top of the second bracket 31 through bolts. The power output shaft of the second motor 35 passes through the inside of the mounting tube and is fixedly connected to the turntable 32. When using the second grinding mechanism 3 to grind or polish fitness equipment, the second motor 35 works and drives the turntable 32 to rotate through its power output shaft.

[0029] Refer to Figure 8 , the second adjustment assembly 36 includes a fixed tube 361 fixedly connected to the turntable 32, a piston rod 362 inserted into the inside of the fixed tube 361, and a columnar airbag 363 arranged inside the fixed tube 361. The piston rod 362 is slidable inside the fixed tube 361. The columnar airbag 363 is arranged between the piston rod 362 and the turntable 32, with one end fixedly connected to the turntable 32 and the other end fixedly connected to the piston rod 362. The columnar airbag 363 is connected to an external air source. When adjusting the distance between the grinding disc 34 and the turntable 32, the external air source supplies air to the columnar airbag 363, increasing the pressure inside the columnar airbag 363, causing the columnar airbag 363 to expand, thereby pushing the piston rod 362 out of the fixed tube 361, so as to adjust the distance between the turntable 32 and part of the grinding disc 34 and change the shape of the grinding disc 34.

[0030] The second grinding mechanism 3 is used to grind or polish smaller areas or some hole and groove areas on fitness equipment. When grinding or polishing a hole and groove area, if the depth of the hole and groove is small and the diameter is large, and the grinding disc 34 does not need to be deformed to a large extent, the second air cushion 33 is driven to deform by the pressure during the grinding or polishing process, so that the grinding disc 34 fits against the inner wall of the hole and groove. If the depth of the hole and groove is large and the diameter is small, resulting in a large curvature of the inner wall of the hole and groove, and the grinding disc 34 cannot be made to fit against the inner wall of the hole and groove only by the deformation of the second air cushion 33, the control part of the second adjustment mechanism is extended, causing the columnar airbag 363 in the middle part to expand, pushing out the piston rod 362 at the center position, so that the grinding disc 34 in the middle position protrudes to form a curved surface, and further making the grinding disc 34 fit more closely against the inner wall of the hole and groove.

[0031] When grinding or polishing fitness equipment, first analyze the area and shape of the grinding or polishing area. If the area of this area is large and the shape is more suitable for using the first grinding mechanism 2 for polishing or grinding, then use the first grinding mechanism 2. If the shape of the grinding or polishing area is similar to the shape of the grinding tool 24, during grinding or polishing, the first air cushion 23 deforms under the action of pressure, thereby adjusting the shape of the grinding tool 24 to make the shape of the grinding tool 24 match the shape of the polishing or grinding area. If the shape of the grinding or polishing area differs greatly from the shape of the grinding tool 24, the distance between some molds and the roller 22 is adjusted through the first adjustment component 26, thereby adjusting the shape of the molds. After grinding is completed, the external air source evacuates the air inside the annular airbag 262, reducing the pressure of the annular airbag 262, causing the annular airbag 262 to contract, thereby reducing the distance between the grinding tool 24 and the roller 22 and making the grinding tool 24 reset.

[0032] If the grinding or polishing area is small or the curvature of the shape is large, and it is not possible to grind or polish well using the first grinding mechanism 2, then use the second grinding mechanism 3 for grinding or polishing. If the grinding disc 34 in the grinding or polishing area does not need to be deformed to a large extent, the second air cushion 33 is driven to deform by the pressure during the grinding or polishing process, so that the grinding disc 34 fits against the inner wall of the hole and groove. If the curvature of the grinding or polishing area is large and the grinding disc 34 cannot be made to fit against the inner wall of the hole and groove only by the deformation of the second air cushion 33, the control part of the second adjustment mechanism is extended, causing the columnar airbag 363 in the middle part to expand, pushing out the piston rod 362 at the center position, so that the grinding disc 34 in the middle position protrudes to form a curved surface, and further making the grinding disc 34 fit more closely against the inner wall of the hole and groove. After grinding or polishing is completed, the external air source is controlled to evacuate the air inside the columnar airbag 363, reducing the pressure inside the columnar airbag 363, causing the columnar airbag 363 to contract, thereby pulling the piston rod 362 back to its original position, and further making the grinding disc 34 reset.

[0033] In this embodiment, the shape of the grinding disc 34 is disc-shaped, and the shape of the grinding tool 24 is cylindrical. The grinding disc 34 and the grinding tool 24 can be made of the same material, such as sandpaper. Both the first grinding mechanism 2 and the second grinding mechanism 3 perform grinding work. When performing polishing work, the grinding disc 34 and the grinding tool 24 can be replaced with polishing tools. Alternatively, either the grinding tool 24 or the grinding disc 34 can be changed into a polishing tool, so that one of the first grinding mechanism 2 and the second grinding mechanism 3 performs grinding tasks and the other performs polishing tasks.

[0034] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A welding tool for community fitness equipment, characterized in that: include: Base (1); A first grinding mechanism (2) is arranged on the base (1); the first grinding mechanism (2) comprises a grinding tool (24) for polishing or grinding a workpiece, a roller (22) for mounting the grinding tool (24), and a first air cushion (23) arranged between the roller (22) and the grinding tool (24); the grinding tool (24), the roller (22) and the first air cushion (23) are all fixedly connected; when polishing or grinding a workpiece, the first air cushion (23) will deform under the action of pressure, so that the grinding tool (24) adapts to the shape of the workpiece.

2. A welding tool for community fitness equipment according to claim 1, characterized in that: The first grinding mechanism (2) comprises: a first bracket (21) mounted on the base (1), a first motor (25) mounted on the first bracket (21), the roller (22) being rotatably connected to the first bracket (21), the roller (22) being coaxially arranged and fixedly connected with a power output shaft of the first motor (25), and the first motor (25) being used to drive the roller (22) to rotate so as to drive the grinding tool (24) to polish or grind the workpiece.

3. A welding tool for community fitness equipment according to claim 2, characterized in that: The first bracket (21) comprises a mounting ear (211) fixedly connected to the base (1), two mounting ears (211) are provided, a spacing is provided between the two mounting ears (211), the rotating roller (22) is arranged between the two mounting ears (211), two ends of the rotating roller (22) are respectively rotatably connected to the two mounting ears (211), and the first motor (25) is fixedly connected to the mounting ears (211).

4. A welding tool for community fitness equipment according to claim 2, characterized in that: The first grinding mechanism (2) further comprises a first adjusting component (26), which is arranged between the first air cushion (23) and the rotating roller (22), and the first adjusting component (26) is provided with a plurality of first adjusting components (26) which are evenly distributed along the axial direction of the rotating roller (22), and the first adjusting component (26) has an annular airbag (262) arranged between the rotating roller (22) and the first air cushion (23), and the annular airbag (262) is inflatable, and the annular airbag (262) is used to adjust the distance between part of the first air cushion (23) and the rotating roller (22), thereby adjusting the shape of the grinding tool (24).

5. A welding tool for community fitness equipment according to claim 4, characterized in that: The first adjustment component (26) comprises a fixing member (261) fixedly connected to the circumferential surface of the roller (22); the fixing member (261) is provided with a chamber for mounting the annular airbag (262); a portion of the annular airbag (262) is fixedly connected to the fixing member (261); a portion of the annular airbag (262) is fixedly connected to the fixing member (261); a portion of the annular airbag (262) is fixedly connected to the first air cushion (23); when the annular airbag (262) contracts or expands, a portion of the first air cushion (23) is driven to bulge, thereby adjusting a portion of the distance between the first air cushion (23) and the roller (22).

6. A welding tool for community fitness equipment according to claim 1, characterized in that: The invention also comprises a second grinding mechanism (3), which is mounted on the base (1); the second grinding mechanism (3) comprises a grinding disc (34) for polishing or grinding a workpiece, a turntable (32) for mounting the grinding disc (34), and a second air cushion (33) arranged between the turntable (32) and the grinding disc (34); when polishing or grinding the workpiece, the second air cushion (33) will deform under the action of pressure, so that the grinding disc (34) adapts to the shape of the workpiece.

7. A welding tool for community fitness equipment according to claim 6, characterized in that: The second grinding mechanism (3) comprises a second bracket (31) mounted on the base (1), and a second motor (35) mounted on the second bracket (31); a power output shaft of the second motor (35) is coaxially arranged and fixedly connected to the turntable (32); the second motor (35) is used to drive the turntable (32) to rotate, thereby driving the grinding disc (34) to polish or grind the workpiece.

8. A welding tool for community fitness equipment according to claim 7, characterized in that: The second grinding mechanism (3) further comprises a second adjusting component (36), which is arranged between the second air cushion (33) and the turntable (32), and the second adjusting component (36) is used to partially adjust the distance between the second air cushion (33) and the turntable (32), thereby adjusting the shape of the grinding disc (34).

9. A welding tool for community fitness equipment according to claim 8, characterized in that: The second adjustment component (36) is provided with a plurality of parts which are perpendicular to the turntable (32). The second adjustment component (36) includes a fixed tube (361) fixedly connected to the side of the turntable (32), a piston rod (362) fixedly connected to the side of the second air cushion (33), and a columnar air bag (363) arranged inside the fixed tube (361). The piston rod (362) is inserted into the fixed tube (361), and one end of the columnar air bag (363) is fixedly connected to the fixed tube (361), and the other end is fixedly connected to the piston rod (362).

10. A welding tool for community fitness equipment according to claim 7, characterized in that: The rotating disk (32) and the second motor (35) are both arranged on the top of the second bracket (31) and are perpendicular to the second bracket (31).

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