Expanding and shrinking device and technology for deep processing of hollow ultrathin wall of body builder

Abstract

The invention discloses a deep processing expanding and shrinking device and process for a hollow ultrathin wall of a body builder, and particularly relates to the technical field of deep processing equipment for hollow ultrathin-wall profiles. The deep processing expanding and shrinking device comprises a mounting frame, and a limiting device is arranged in the middle of an inner cavity of a mounting hole and slidably mounted on the outer surface of the mounting frame; expanding and shrinking components are arranged on the two sides of the upper portion of the limiting device correspondingly, and pushing devices are arranged on the two sides of the upper end of the mounting frame correspondingly. According to the expansion and contraction device for deep processing of the hollow ultrathin wall of the fitness equipment, by arranging the limiting devices, after a worker places the fitness equipment on the upper portion of the lower fixing piece, output ends of second hydraulic cylinders on the two sides push limiting plates on the two sides to move towards the sides close to each other; the fitness equipment placed on the upper portion of the lower fixing piece is limited through the two limiting plates, the fitness equipment needing to be machined is located between the two limiting plates, then the fitness equipment can be expanded and contracted conveniently, and the reliability of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hollow ultra-thin-wall profile deep processing equipment, and in particular to a hollow ultra-thin-wall deep processing expansion and contraction device for fitness equipment. Background Art

[0002] In the production process of fitness equipment, many parts such as barbells, dumbbells and other hollow thin-walled parts need to be expanded and contracted. Through this device, the size of these parts can be accurately adjusted to meet the needs of different users or the requirements of matching with other parts.

[0003] Chinese patent publication number CN112275922A discloses an expansion and contraction device for deep processing of hollow ultra-thin-wall profiles, including a frame device for support, two transverse shifting devices for lateral feeding are symmetrically installed on the frame device, a longitudinal shifting device for longitudinal feeding is installed on the transverse shifting device, an extrusion device for expanding and contracting hollow ultra-thin-wall profiles is installed on the longitudinal shifting device, and a clamping device for clamping the hollow ultra-thin-wall profiles for rotation is installed in the middle of the frame device. The device avoids changing the mold for expansion and contraction through the setting of rotating line contact extrusion, saves time and effort, and improves work efficiency; the setting of changing the expansion and contraction diameter through longitudinal shift meets the requirements of hollow ultra-thin-wall profiles for different diameters after expansion and contraction, and increases the overall applicability; the symmetrical and independent settings at both ends facilitate simultaneous processing of both ends and separate expansion or contraction, but in actual use, the device requires the staff to manually place the processed object in the middle of the device, but cannot accurately place the processed parts in the corresponding position, affecting the subsequent expansion and contraction movement of the processed parts. Summary of the invention

[0004] The main purpose of the present invention is to provide a hollow ultra-thin wall deep processing expansion and contraction device and process for fitness equipment, which can effectively solve the problem that workers need to manually place the processed objects in the middle of the device, but cannot accurately place the processed parts to the corresponding positions, affecting the subsequent expansion and contraction movement of the processed parts.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A hollow ultra-thin wall deep processing expansion and contraction device for fitness equipment comprises a mounting frame, a mounting hole is penetrated through the middle part of the upper end of the mounting frame, a fixing device slidably mounted on the outer surface of the mounting frame is arranged in the middle part above the mounting hole, a limiting device is arranged in the middle part of the inner cavity of the mounting hole, the limiting device is slidably mounted on the outer surface of the mounting frame, a supporting frame is arranged in the middle part of the upper end of the mounting frame, a hydraulic cylinder 1 is arranged in the middle part of the upper side of the supporting frame, the outer surface of the output rod of the hydraulic cylinder 1 is fixedly connected to the middle part of the upper side of the limiting device, the output end of the hydraulic cylinder 1 is fixedly connected to the upper part of the fixing device, expansion and contraction components are arranged on both sides of the upper part of the limiting device, and pushing devices are arranged on both sides of the upper end of the mounting frame.

[0007] Specifically, before expanding or contracting the fitness equipment, the staff needs to put the fitness equipment to be expanded or contracted into the middle of the fixing device, and then the pushing device pushes the limiting device to operate so that the limiting device limits the fitness equipment. After the limiting device limits the fitness equipment, the hydraulic cylinder outputs to drive the fixing device to fix the fitness equipment. During this process, the hydraulic cylinder drives the limiting device to move downward so that the limiting device does not hinder the subsequent expansion and contraction of the fitness equipment.

[0008] Preferably, the fixing device includes a lower fixing member and an upper fixing member, the middle portion of the upper end of the upper fixing member is fixedly connected to the output end of the hydraulic cylinder, and both sides of the outer surface of the lower fixing member are provided with L-shaped rods slidably mounted on the outer surface of the mounting frame, and the two L-shaped rods are respectively fixed to the outer surface of the mounting frame by two fixing pins, and the lower fixing member is adapted for use with the upper fixing member.

[0009] Specifically, the lower fixing member and the upper fixing member are both composed of V-shaped plates, and when the hydraulic cylinder drives the upper fixing member to move downward, multiple V-shaped plates on the upper fixing member can be inserted between the multiple V-shaped plates on the lower fixing member, so that the lower fixing member and the upper fixing member can fix fitness equipment of different sizes.

[0010] Furthermore, since the lower fixing member and the upper fixing member can fix fitness equipment of different sizes, the centers of fitness equipment of different sizes are not at the same height when they are fixed. Therefore, after the staff places the fitness equipment on the upper part of the lower fixing member, the staff can adjust the height of the lower fixing member. When adjusting the height of the lower fixing member, the L-shaped rod will also slide on the outer surface of the mounting frame. After the adjustment is completed, the L-shaped rod is fixed to the outer surface of the mounting frame by bolts, thereby fixing the lower fixing member.

[0011] Preferably, the limiting device includes a connecting plate 1, and connecting rods slidably mounted on the outer surface of the mounting frame are provided on both sides of the outer surface of the connecting plate 1, and mounting plates are provided at the lower ends of the four connecting rods, and a limiting member is provided at the middle part of the upper end of the mounting plate.

[0012] Preferably, the limiting member includes two limiting plates, which are respectively slidably installed on both sides of the upper end of the mounting plate, and a connecting tube is provided on the side of the outer surfaces of the two limiting plates away from each other, and two limiting rods 1 installed in the middle part of the upper end of the mounting plate are penetrated through the lower part of the two limiting plates, and a spring 1 is wound around the outer surface of the two limiting rods 1, and the two ends of the two springs 1 are respectively fixedly connected to the outer surfaces of the two limiting plates.

[0013] Specifically, after the staff places the fitness equipment on the upper part of the lower fixing part and completes the height adjustment, the two outputs of the hydraulic cylinders on both sides respectively push the limit plates on both sides to move toward each other, and the fitness equipment placed on the upper part of the lower fixing part is limited by the two limit plates, so that the fitness equipment to be processed is in the middle of the two limit plates, so that the fitness equipment can be expanded and contracted later.

[0014] Furthermore, in the process of the two limit plates moving toward each other, the spring 1 wrapped around the surface of the limit rod 1 will be compressed. When the hydraulic cylinder 2 no longer outputs, the limit plates on both sides will return to their initial positions under the push of the two springs 1.

[0015] Preferably, the pushing device includes a second hydraulic cylinder, which is fixedly mounted on the upper end of the mounting frame, and the output end of the second hydraulic cylinder is adapted for use with a connecting tube, and a positioning member is provided at the output end of the second hydraulic cylinder, and the positioning member is slidably mounted on the upper end of the mounting frame.

[0016] Preferably, the positioning member includes a second positioning plate, and the second positioning plate is slidably mounted on the upper end of the mounting frame. A limiting groove is provided in the middle of the second positioning plate, close to the side of the second hydraulic cylinder. The limiting groove is adapted for use with the output end of the second hydraulic cylinder, and a connecting groove is provided in the middle of the second positioning plate, away from the side of the second hydraulic cylinder.

[0017] Specifically, when the staff places the fitness equipment on the upper part of the lower fixing part, the hydraulic cylinders 2 on both sides are output, and the hydraulic cylinders 2 on both sides respectively push the two limit plates to move closer to each other through the connecting tubes on both sides, so that the limit plates on both sides can limit the fitness equipment.

[0018] Furthermore, when the output of the second hydraulic cylinder drives the two limit plates to move, since the limit groove contacts the output end of the second hydraulic cylinder, there is no fixed relationship between the limit groove and the output end of the second hydraulic cylinder, and therefore the positioning member does not move.

[0019] Preferably, the expansion and contraction component includes a second connecting plate, which is slidably mounted on the lower end of the first connecting plate, and an expansion and contraction mechanism is provided at the lower end of the second connecting plate. A limiting rod second is fixedly mounted on a lower end of the connecting plate in the middle of the upper end of the second connecting plate, and a spring second is wound around the outer surface of the limiting rod second, and one end of the spring second away from the hydraulic cylinder one is fixedly connected to the outer surface of the second connecting plate.

[0020] Preferably, the telescopic mechanism includes a positioning plate 1, the upper end of the positioning plate 1 is fixedly connected to the lower end of the connecting plate 2, the positioning plate 1 and the positioning plate 2 are adapted for use, a limiting block is provided on one side of the middle part of the lower end of the positioning plate 1, the limiting block is adapted for use with the output end of the hydraulic cylinder 2, the limiting block is adapted for use with the limiting groove, a connecting block is provided on the other side of the middle part of the lower end of the positioning plate 1, the connecting block is adapted for use with the connecting groove, and an expansion and contraction part is provided on the side of the outer surface of the connecting block away from the limiting block.

[0021] Specifically, after the limiting device limits the fitness equipment that needs to be expanded or contracted, hydraulic cylinder 2 returns to its initial state. At this time, the output of hydraulic cylinder 1 drives connecting plate 1 and connecting rod to drive the mounting plate and the limiting part to move downward. At the same time, in the process of hydraulic cylinder 1 driving connecting plate 1 to move downward, connecting plate 1 will also drive the expansion and contraction parts on both sides to move downward. In the process of the expansion and contraction parts moving downward, the expansion and contraction mechanism will combine with the positioning part.

[0022] Furthermore, after the telescopic mechanism and the positioning piece are combined, the connecting block will enter the inner cavity of the connecting groove. At this time, if the hydraulic cylinder 2 outputs, the output end of the hydraulic cylinder 2 will contact the surface of the connecting block, so that the connecting block can drive the positioning plate 1 and the positioning plate 2 to move together.

[0023] Furthermore, when the expansion and contraction mechanism and the positioning member are combined, the output of hydraulic cylinder 2 drives the expansion and contraction mechanism and the positioning member to move, so that the expansion and contraction member contacts the fitness equipment, thereby causing the expansion and contraction member to expand and contract the fitness equipment. After the expansion and contraction is completed, hydraulic cylinder 2 drives the expansion and contraction mechanism and the positioning member to move to the initial position. When the expansion and contraction member is out of contact with the fitness equipment, at this time, hydraulic cylinder 1 drives the expansion and contraction member to move upward and return to the initial position through connecting plate 1. At the same time, the expansion and contraction mechanism will also return to the initial position under the action of spring 2, and will not hinder the next expansion and contraction movement of the expansion and contraction mechanism on the fitness equipment.

[0024] Furthermore, when the hydraulic cylinder drives the expansion and contraction component to move upward, the upper fixing part will also release the fixation of the fitness equipment. At this time, the staff can remove the fitness equipment after expansion and contraction, and then put in the next fitness equipment that needs to be expanded and contracted, and repeat this process.

[0025] Furthermore, the expansion and contraction member is a cylindrical extrusion body in the drawings of this specification, but the staff can replace it as needed.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. In the present invention, by setting a limiting device, after the staff places the fitness equipment on the upper part of the lower fixing member, the two outputs of the hydraulic cylinders on both sides respectively push the limiting plates on both sides to move toward the side close to each other, and the fitness equipment placed on the upper part of the lower fixing member is limited by the two limiting plates, so that the fitness equipment to be processed is in the middle of the two limiting plates, so that the fitness equipment can be expanded and contracted later, thereby improving the reliability of the device.

[0028] 2. In the present invention, by providing an expansion and contraction component and a pushing device, when the telescopic mechanism is not combined with the positioning member, the second hydraulic cylinder can push the limit plate to move. When the telescopic mechanism and the positioning member are combined, the fitness equipment can be expanded and contracted under the push of the second hydraulic cylinder, so that the second hydraulic cylinder can push different components to operate. At the same time, the first hydraulic cylinder can drive the limit device to move downward while also driving the expansion and contraction components on both sides to move downward, thereby reducing the manufacturing cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure of the fixing device of the present invention;

[0031] Figure 3 It is a schematic diagram of the structure of the limiting device of the present invention;

[0032] Figure 4 It is a schematic diagram of the structure of the position-limiting member of the present invention;

[0033] Figure 5 It is a schematic diagram of the assembly of the pushing device of the present invention;

[0034] Figure 6 It is a schematic diagram of the structure of the pushing device of the present invention;

[0035] Figure 7 It is a schematic diagram of the assembly of the expansion and contraction components of the present invention;

[0036] Figure 8 It is a schematic diagram of the structure of the expansion and contraction component of the present invention;

[0037] Fig. 9 It is a schematic diagram of the telescopic mechanism structure of the present invention;

[0038] Fig.10 It is a schematic diagram of the assembly of the telescopic mechanism and the positioning member of the present invention.

[0039] In the figure: 1. mounting frame; 11. mounting hole; 2. fixing device; 21. lower fixing piece; 22. upper fixing piece; 23. L-shaped rod; 3. limiting device; 31. connecting plate 1; 32. connecting rod; 33. mounting plate; 34. limiting piece; 341. limiting plate; 342. connecting tube; 343. limiting rod 1; 344. spring 1; 4. supporting frame; 5. hydraulic cylinder 1; 6. expansion and contraction component; 61. connecting plate 2; 62. expansion and contraction mechanism; 621. positioning plate 1; 622. limiting block; 623. connecting block; 624. expansion and contraction piece; 63. limiting rod 2; 64. spring 2; 7. pushing device; 71. hydraulic cylinder 2; 72. positioning piece; 721. positioning plate 2; 722. limiting groove; 723. connecting groove. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0041] Embodiment 1, as Figure 1 As shown, the present embodiment discloses a hollow ultra-thin wall deep processing expansion and contraction device for fitness equipment, comprising a mounting frame 1, a mounting hole 11 is penetrated through the middle of the upper end of the mounting frame 1, a fixing device 2 slidably mounted on the outer surface of the mounting frame 1 is arranged in the middle above the mounting hole 11, a limiting device 3 is arranged in the middle of the inner cavity of the mounting hole 11, the limiting device 3 is slidably mounted on the outer surface of the mounting frame 1, a supporting frame 4 is arranged in the middle of the upper end of the mounting frame 1, a hydraulic cylinder 5 is arranged in the middle of the upper side of the supporting frame 4, the outer surface of the output rod of the hydraulic cylinder 5 is fixedly connected to the middle of the upper side of the limiting device 3, the output end of the hydraulic cylinder 5 is fixedly connected to the upper part of the fixing device 2, and pushing devices 7 are arranged on both sides of the upper end of the mounting frame 1.

[0042] Specifically, before expanding or contracting the fitness equipment, the staff needs to place the fitness equipment to be expanded or contracted into the middle of the fixing device 2, and then use the pushing device 7 to push the limiting device 3 to operate, so that the limiting device 3 limits the fitness equipment. After the limiting device 3 limits the fitness equipment, the output of the hydraulic cylinder 5 drives the fixing device 2 to fix the fitness equipment. During this process, the hydraulic cylinder 5 will drive the limiting device 3 to move downward, so that the limiting device 3 does not hinder the subsequent expansion and contraction movement of the fitness equipment.

[0043] In order to fix the fitness equipment that needs to be processed, such as Figure 2 As shown, the fixing device 2 includes a lower fixing member 21 and an upper fixing member 22. The middle portion of the upper end of the upper fixing member 22 is fixedly connected to the output end of the hydraulic cylinder 5. Both sides of the outer surface of the lower fixing member 21 are provided with L-shaped rods 23 slidably mounted on the outer surface of the mounting frame 1. The two L-shaped rods 23 are respectively fixed to the outer surface of the mounting frame 1 by two fixing pins. The lower fixing member 21 and the upper fixing member 22 are adapted for use.

[0044] Specifically, the lower fixing member 21 and the upper fixing member 22 are both composed of V-shaped plates, and when the hydraulic cylinder 5 drives the upper fixing member 22 to move downward, the multiple V-shaped plates on the upper fixing member 22 can be inserted between the multiple V-shaped plates on the lower fixing member 21, so that the lower fixing member 21 and the upper fixing member 22 can fix fitness equipment of different sizes.

[0045] Furthermore, since the lower fixing member 21 and the upper fixing member 22 can fix fitness equipment of different sizes, the centers of fitness equipment of different sizes are not at the same height when fixed. Therefore, after the staff places the fitness equipment on the upper part of the lower fixing member 21, the staff can adjust the height of the lower fixing member 21. When adjusting the height of the lower fixing member 21, the L-shaped rod 23 will also slide on the outer surface of the mounting frame 1. After the adjustment is completed, the L-shaped rod 23 is fixed to the outer surface of the mounting frame 1 by bolts, thereby fixing the lower fixing member 21.

[0046] In order to limit the fitness equipment that needs to be processed, such as Figure 3 As shown, the limiting device 3 includes a connecting plate 31, and connecting rods 32 slidably mounted on the outer surface of the mounting frame 1 are arranged on both sides of the outer surface of the connecting plate 31, and a mounting plate 33 is arranged at the lower end of the four connecting rods 32, and a limiting member 34 is arranged in the middle of the upper end of the mounting plate 33.

[0047] Further, such as Figure 4 As shown, the limiting member 34 includes two limiting plates 341, and the two limiting plates 341 are respectively slidably installed on both sides of the upper end of the mounting plate 33. The outer surfaces of the two limiting plates 341 are provided with connecting tubes 342 on the sides away from each other. The lower parts of the two limiting plates 341 are penetrated by two limiting rods 343 installed in the middle part of the upper end of the mounting plate 33. The outer surfaces of the two limiting rods 343 are both wound with springs 344, and the two ends of the two springs 344 are respectively fixedly connected to the outer surfaces of the two limiting plates 341.

[0048] Further, such as Figure 5 As shown, the pushing device 7 includes a second hydraulic cylinder 71 , which is fixedly mounted on the upper end of the mounting frame 1 , and the output end of the second hydraulic cylinder 71 is adapted for use with the connecting tube 342 .

[0049] Specifically, after the staff places the fitness equipment on the upper part of the lower fixing member 21 and completes the height adjustment, the outputs of the hydraulic cylinders 71 on both sides respectively push the limit plates 341 on both sides to move toward each other, and the fitness equipment placed on the upper part of the lower fixing member 21 is limited by the two limit plates 341, so that the fitness equipment to be processed is in the middle of the two limit plates 341, so that the fitness equipment can be expanded and contracted later.

[0050] Furthermore, when the two limit plates 341 move toward each other, the spring 1 344 wrapped around the surface of the limit rod 1 343 will be compressed. When the hydraulic cylinder 2 71 no longer outputs, the limit plates 341 on both sides will return to their initial positions under the push of the two springs 1 344.

[0051] Embodiment 2: This embodiment further improves the expansion and contraction component 6 based on the embodiment 1. Figure 1 As shown, expansion and contraction components 6 are provided on both sides of the upper portion of the limiting device 3 .

[0052] In order to expand and contract the fitness equipment, at the same time, the hydraulic cylinder 2 71 can push the limit device 3 to operate, such as Figure 5 As shown, a positioning member 72 is provided at the output end of the second hydraulic cylinder 71 , and the positioning member 72 is slidably mounted on the upper end of the mounting frame 1 .

[0053] Further, such as Figure 6 As shown, the positioning member 72 includes a second positioning plate 721, which is slidably mounted on the upper end of the mounting frame 1. A limiting groove 722 is provided on the middle part of the positioning plate 721, close to the side of the hydraulic cylinder 71. The limiting groove 722 is adapted for use with the output end of the hydraulic cylinder 71. A connecting groove 723 is provided on the middle part of the positioning plate 721, away from the side of the hydraulic cylinder 71.

[0054] Specifically, when the staff places the fitness equipment on the upper part of the lower fixing member 21, the hydraulic cylinders 71 on both sides are output, and the hydraulic cylinders 71 on both sides push the two limit plates 341 to move toward each other through the connecting tubes 342 on both sides, so that the limit plates 341 on both sides can limit the fitness equipment.

[0055] Furthermore, when the output of the second hydraulic cylinder 71 drives the two limit plates 341 to move, since the limit groove 722 contacts the output end of the second hydraulic cylinder 71, there is no fixed relationship between the limit groove 722 and the output end of the second hydraulic cylinder 71, the positioning member 72 will not move.

[0056] In order to scale fitness equipment, Figure 7 and Figure 8 As shown, the expansion and contraction component 6 includes a connecting plate 61, which is slidably installed on the lower end of the connecting plate 31, and a telescopic mechanism 62 is provided at the lower end of the connecting plate 61. A limiting rod 63 fixedly installed on the lower end of the connecting plate 31 is provided in the middle of the upper end of the connecting plate 61, and a spring 64 is wound around the outer surface of the limiting rod 63. The end of the spring 64 away from the hydraulic cylinder 5 is fixedly connected to the outer surface of the connecting plate 61.

[0057] Further, such as Fig. 9 and Fig.10 As shown, the telescopic mechanism 62 includes a positioning plate 621, the upper end of the positioning plate 621 is fixedly connected to the lower end of the connecting plate 61, the positioning plate 621 is adapted for use with the positioning plate 721, a limiting block 622 is provided on one side of the middle part of the lower end of the positioning plate 621, the limiting block 622 is adapted for use with the output end of the hydraulic cylinder 71, the limiting block 622 is adapted for use with the limiting groove 722, a connecting block 623 is provided on the other side of the middle part of the lower end of the positioning plate 621, the connecting block 623 is adapted for use with the connecting groove 723, and an expansion and contraction part 624 is provided on the outer surface of the connecting block 623 away from the limiting block 622.

[0058] Specifically, after the limiting device 3 limits the fitness equipment that needs to be expanded or contracted, the hydraulic cylinder 2 71 returns to the initial state. At this time, the output of the hydraulic cylinder 1 5 drives the mounting plate 33 and the limiting member 34 to move downward by driving the connecting plate 1 31 and the connecting rod 32. At the same time, in the process of the hydraulic cylinder 1 5 driving the connecting plate 1 31 to move downward, the connecting plate 1 31 will also drive the expansion and contraction components 6 on both sides to move downward. In the process of the expansion and contraction components 6 moving downward, the expansion and contraction mechanism 62 will combine with the positioning member 72.

[0059] Furthermore, after the telescopic mechanism 62 and the positioning member 72 are combined, the connecting block 623 will enter the inner cavity of the connecting groove 723, as shown in FIG. Fig.10 As shown, at this time, if the hydraulic cylinder 2 71 outputs, the output end of the hydraulic cylinder 2 71 will contact the surface of the connecting block 623, so that the connecting block 623 can drive the positioning plate 1 621 and the positioning plate 2 721 to move together.

[0060] Furthermore, when the telescopic mechanism 62 and the positioning member 72 are combined, the output of the second hydraulic cylinder 71 drives the expansion and contraction mechanism 62 and the positioning member 72 to move, so that the expansion and contraction member 624 contacts the fitness equipment, thereby causing the expansion and contraction member 624 to expand and contract the fitness equipment. After the expansion and contraction is completed, the second hydraulic cylinder 71 drives the expansion and contraction mechanism 62 and the positioning member 72 to move to the initial position. When the expansion and contraction member 624 is out of contact with the fitness equipment, at this time, the hydraulic cylinder 1 5 drives the expansion and contraction member 6 to move upward and return to the initial position through the connecting plate 1 31. At the same time, the expansion and contraction mechanism 62 will also return to the initial position under the action of the second spring 64, and will not hinder the expansion and contraction movement of the expansion and contraction mechanism 62 on the fitness equipment next time.

[0061] Furthermore, when the hydraulic cylinder 1 5 drives the expansion and contraction component 6 to move upward, the upper fixing member 22 will also release the fixation of the fitness equipment. At this time, the staff can remove the fitness equipment after expansion and contraction, and then put in the next fitness equipment that needs to be expanded and contracted, and repeat this process.

[0062] Furthermore, the expansion and contraction member 624 is a cylindrical extrusion body in the drawings of this specification, but the staff can replace it as needed.

[0063] Embodiment 3, the present application also discloses a method for using a withstand voltage detection device for electric power equipment, the specific steps are as follows:

[0064] S1. Before expanding or contracting the fitness equipment, the staff needs to place the fitness equipment to be expanded or contracted on the upper part of the lower fixing member 21. Since the diameters of the fitness equipment are different, the staff can adjust the height of the lower fixing member 21 through the L-shaped rod 23;

[0065] S2. After the staff has adjusted the height of the lower fixing member 21, the hydraulic cylinders 71 on both sides are started, so that the hydraulic cylinders 71 on both sides push the limiting plates 341 on both sides to limit the fitness equipment, so that the fitness equipment is located between the two limiting plates 341, so that the expanding and contracting component 6 can expand and contract the fitness equipment later;

[0066] S3. After the limiting device 3 limits the fitness equipment, the hydraulic cylinder 1 5 drives the upper fixing member 22 to move downward to fix the fitness equipment. At the same time, the hydraulic cylinder 1 5 drives the expansion and contraction components 6 on both sides to move downward through the connecting plate 1 31, so that the expansion and contraction mechanism 62 is combined with the positioning member 72, so that the hydraulic cylinder 2 71 can drive the telescopic mechanism 62 and the positioning member 72 to move when outputting;

[0067] S4. The fitness equipment is fixed under the action of the upper fixing member 22 and the lower fixing member 21. After the telescopic mechanism 62 and the positioning member 72 are combined, the hydraulic cylinder 2 71 outputs to drive the expansion and contraction member 624 on the expansion and contraction mechanism 62 to move, so that the expansion and contraction member 624 expands and contracts the fitness equipment.

[0068] It should be noted that the specific installation method, circuit arrangement and connection method, and control method of the hydraulic cylinder 1 5 and the two hydraulic cylinders 2 71 used in the above-mentioned embodiment 1 are conventional designs in the prior art and will not be elaborated in detail in the present invention.

[0069] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hollow ultra-thin wall deep processing expansion and contraction device for fitness equipment, comprising a mounting frame (1), characterized in that: A mounting hole (11) is provided in the middle of the upper end of the mounting frame (1); a fixing device (2) slidably mounted on the outer surface of the mounting frame (1) is provided in the middle of the upper end of the mounting hole (11); a limiting device (3) is provided in the middle of the inner cavity of the mounting hole (11); the limiting device (3) is slidably mounted on the outer surface of the mounting frame (1); a support frame (4) is provided in the middle of the upper end of the mounting frame (1); a hydraulic cylinder (5) is provided in the middle of the upper side of the support frame (4); the outer surface of the output rod of the hydraulic cylinder (5) is fixedly connected to the middle of the upper side of the limiting device (3); the output end of the hydraulic cylinder (5) is fixedly connected to the upper part of the fixing device (2); expansion and contraction components (6) are provided on both sides of the upper part of the limiting device (3); and a pushing device (7) is provided on both sides of the upper end of the mounting frame (1).

2. The hollow ultra-thin wall deep processing expansion and contraction device of a fitness equipment according to claim 1, characterized in that: The fixing device (2) comprises a lower fixing member (21) and an upper fixing member (22); the middle portion of the upper end of the upper fixing member (22) is fixedly connected to the output end of the hydraulic cylinder (5); both sides of the outer surface of the lower fixing member (21) are provided with L-shaped rods (23) slidably mounted on the outer surface of the mounting frame (1); the two L-shaped rods (23) are respectively fixed to the outer surface of the mounting frame (1) by two fixing pins; the lower fixing member (21) and the upper fixing member (22) are adapted for use.

3. The hollow ultra-thin wall deep processing expansion and contraction device of a fitness equipment according to claim 1, characterized in that: The limiting device (3) comprises a connecting plate (31), both sides of the outer surface of the connecting plate (31) are provided with connecting rods (32) slidably mounted on the outer surface of the mounting frame (1), the lower ends of the four connecting rods (32) are provided with mounting plates (33), and the middle part of the upper end of the mounting plate (33) is provided with a limiting member (34).

4. The hollow ultra-thin wall deep processing expansion and contraction device for fitness equipment according to claim 3, characterized in that: The limiting member (34) comprises two limiting plates (341), the two limiting plates (341) are respectively slidably mounted on both sides of the upper end of the mounting plate (33), a connecting tube (342) is provided on the side of the outer surfaces of the two limiting plates (341) away from each other, two limiting rods (343) installed on the middle part of the upper end of the mounting plate (33) are penetrated through the lower part of the two limiting plates (341), the outer surfaces of the two limiting rods (343) are respectively wound with springs (344), and the two ends of the two springs (344) are respectively fixedly connected to the outer surfaces of the two limiting plates (341).

5. The hollow ultra-thin wall deep processing expansion and contraction device for fitness equipment according to claim 4, characterized in that: The pushing device (7) comprises a second hydraulic cylinder (71), the second hydraulic cylinder (71) being fixedly mounted on the upper end of the mounting frame (1), the output end of the second hydraulic cylinder (71) being adapted for use with a connecting tube (342), the output end of the second hydraulic cylinder (71) being provided with a positioning member (72), the positioning member (72) being slidably mounted on the upper end of the mounting frame (1).

6. The hollow ultra-thin wall deep processing expansion and contraction device for fitness equipment according to claim 5, characterized in that: The positioning member (72) comprises a second positioning plate (721), wherein the second positioning plate (721) is slidably mounted on the upper end of the mounting frame (1), a limiting groove (722) is provided in the middle of the second positioning plate (721) on a side close to the second hydraulic cylinder (71), the limiting groove (722) is adapted for use with the output end of the second hydraulic cylinder (71), and a connecting groove (723) is provided in the middle of the second positioning plate (721) on a side away from the second hydraulic cylinder (71).

7. The hollow ultra-thin wall deep processing expansion and contraction device of fitness equipment according to claim 6, characterized in that: The expansion and contraction component (6) comprises a second connecting plate (61), wherein the second connecting plate (61) is slidably mounted on the lower end of the first connecting plate (31), a telescopic mechanism (62) is arranged at the lower end of the second connecting plate (61), a limiting rod (63) fixedly mounted on the lower end of the first connecting plate (31) is arranged at the middle part of the upper end of the second connecting plate (61), a second spring (64) is wound around the outer surface of the second limiting rod (63), and an end of the second spring (64) away from the first hydraulic cylinder (5) is fixedly connected to the outer surface of the second connecting plate (61).

8. The hollow ultra-thin wall deep processing expansion and contraction device for fitness equipment according to claim 7, characterized in that: The expansion and contraction mechanism (62) comprises a positioning plate (621), the upper end of which is fixedly connected to the lower end of the connecting plate (61), the positioning plate (621) and the positioning plate (721) are adapted for use, a limiting block (622) is arranged on one side of the middle of the lower end of the positioning plate (621), the limiting block (622) is adapted for use with the output end of the hydraulic cylinder (71), the limiting block (622) and the limiting groove (722) are adapted for use, a connecting block (623) is arranged on the other side of the middle of the lower end of the positioning plate (621), the connecting block (623) and the connecting groove (723) are adapted for use, and an expansion and contraction component (624) is arranged on the side of the outer surface of the connecting block (623) away from the limiting block (622).

9. A method for using the hollow ultra-thin wall deep processing expansion and contraction device of any one of claims 1 to 8, characterized in that: The specific steps are as follows: S1. Before expanding or contracting the fitness equipment, the staff needs to place the fitness equipment to be expanded or contracted on the upper part of the lower fixing member (21). Since the diameters of the fitness equipment are different, the staff can adjust the height of the lower fixing member (21) through the L-shaped rod (23); S2. After the staff has adjusted the height of the lower fixing member (21), the hydraulic cylinders (71) on both sides are started, so that the hydraulic cylinders (71) on both sides push the limiting plates (341) on both sides to limit the fitness equipment, so that the fitness equipment is located between the two limiting plates (341), so that the expansion and contraction component (6) can expand and contract the fitness equipment later; S3. After the limiting device (3) limits the fitness equipment, the hydraulic cylinder (5) drives the upper fixing member (22) to move downward to fix the fitness equipment. At the same time, the hydraulic cylinder (5) drives the expansion and contraction components (6) on both sides to move downward through the connecting plate (31), so that the telescopic mechanism (62) is combined with the positioning member (72), so that the hydraulic cylinder (71) can drive the telescopic mechanism (62) and the positioning member (72) to move when it is output; S4. The fitness equipment is fixed under the action of the upper fixing member (22) and the lower fixing member (21), and after the telescopic mechanism (62) and the positioning member (72) are combined, the second hydraulic cylinder (71) is output to drive the expansion and contraction member (624) on the expansion and contraction mechanism (62) to move, so that the expansion and contraction member (624) expands and contracts the fitness equipment.

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