Multi-degree-of-freedom robot arm for fitness equipment and fitness equipment

Abstract

This invention provides a multi-degree-of-freedom robotic arm for fitness equipment and the fitness equipment itself. The multi-degree-of-freedom robotic arm includes: a sliding limit assembly, a first angle adjustment limit assembly, a second angle adjustment limit assembly, and a robotic arm. The first angle adjustment limit assembly is movably mounted on the column of the fitness equipment via the sliding limit assembly. The robotic arm is connected to the first angle adjustment limit assembly via the second angle adjustment limit assembly. The first angle adjustment limit assembly includes a first button cover, a first button, a first fixing plate, a first elastic limit member, and a rotating connector. The rotating connector is disposed between the sliding limit assembly and the second angle adjustment limit assembly, and has a first mounting hole in the horizontal direction. This invention not only satisfies the multi-degree-of-freedom adjustment of the robotic arm but also effectively reduces the production and assembly costs of the product, improves material commonality, and meets the adjustment requirements of the robotic arm for fitness equipment.

Description

Technical Field

[0001] This invention relates to a robotic arm, more particularly to a multi-degree-of-freedom robotic arm for fitness equipment, and further to fitness equipment including the multi-degree-of-freedom robotic arm. Background Technology

[0002] In the field of fitness equipment, the adjustability of robotic arms is crucial to meeting the needs of diverse users. Traditional fitness equipment robotic arms typically only allow for angle or height adjustment in a single direction, resulting in limited functionality. For example, some robotic arms only support vertical angle adjustment and cannot make rapid adjustments in the horizontal direction. This forces users to frequently adjust their posture or reset the equipment during use, and it is also inconvenient for meeting the needs of customers performing different fitness programs. Even though some existing robotic arms can adjust both angle and height, their inefficient structural design, with independent functions and structures between components, leads to problems such as fragmented material usage, high production costs, and cumbersome assembly processes. These shortcomings make it difficult to meet the demands of fitness equipment manufacturers for reduced production costs and improved assembly efficiency in terms of robotic arm adjustment. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a multi-degree-of-freedom robotic arm for fitness equipment. The aim is to optimize the design of the structure so that the robotic arm can meet the multi-degree-of-freedom adjustment requirements, further reduce its production and assembly costs, improve material sharing and assembly efficiency, and meet the adjustment requirements of the robotic arm for fitness equipment.

[0004] To address this, the present invention provides a multi-degree-of-freedom robotic arm for fitness equipment, comprising: a sliding limit component, a first angle adjustment limit component, a second angle adjustment limit component, and a robotic arm; the first angle adjustment limit component is movably mounted on the column of the fitness equipment via the sliding limit component, and the robotic arm is connected to the first angle adjustment limit component via the second angle adjustment limit component; The first angle adjustment limiting component includes a first button cover, a first button, a first fixed plate, a first elastic limiting member, and a rotating connector. The first button is mounted on the first fixed plate via the first button cover, and the first fixed plate is fixedly connected to the top and bottom of the sliding limiting component. The rotating connector is disposed between the sliding limiting component and the second angle adjustment limiting component, and a first mounting hole is provided at the first end of the rotating connector in the horizontal direction. The first elastic limiting member is disposed in the first mounting hole and passes through the first fixed plate, abutting against the first button. When the first button is pressed, the first elastic limiting member is pressed and disengaged from the first fixed plate, at which time the rotating connector can rotate relative to the first fixed plate. When the first button is released, the first elastic limiting member is inserted into the first fixed plate under elastic action, thereby limiting the rotating connector in the horizontal direction.

[0005] A further improvement of the present invention is that the first elastic limiting member includes a first pin and a first spring, wherein the first spring is disposed directly below the first pin.

[0006] A further improvement of the present invention is that the first fixing plate is provided with a first limiting hole, the number of the first limiting holes being an integer multiple of the number of the first mounting holes; the bottom of the first button is provided with a first pressing post, the number and position of the first pressing post corresponding to the number and position of the first limiting holes respectively; and the height of the first pressing post corresponding to the thickness of the first fixing plate.

[0007] A further improvement of the present invention is that a first rotation limiting member is provided at the first end of the rotating connector, and a first rotation limiting groove is provided on the inner side of the first fixed plate, the position of the first rotation limiting groove corresponding to the position of the first rotation limiting member.

[0008] A further improvement of the present invention is that the first angle adjustment limiting component further includes a first connecting ring, the first connecting ring adopts a circular rotating structure with an opening, the opening of the first connecting ring is sleeved on one end of the rotating connector near the sliding limiting component; the first end face of the rotating connector is provided with a first groove and a second groove, the inner wall of the first connecting ring is provided with a blocking end and a limiting protrusion, the blocking end is embedded in the first groove, and the limiting protrusion is provided in the second groove.

[0009] A further improvement of the present invention is that the second angle adjustment limiting component includes a second button cover, a second button, a second fixed plate, and a second elastic limiting member. The second button is disposed on the second fixed plate through the second button cover, and the second fixed plate is fixedly connected to the robotic arm. The second end of the rotating connector is provided with a second mounting hole in the vertical direction. The second elastic limiting member is disposed in the second mounting hole and passes through the second fixed plate to abut against the second button. When the second button is pressed, the second elastic limiting member is pressed and disengaged from the second fixed plate. At this time, the second fixed plate can rotate relative to the rotating connector. When the second button is released, the second elastic limiting member is inserted into the second fixed plate under elastic action, thereby limiting the second fixed plate in the vertical direction.

[0010] A further improvement of the present invention is that the second fixed plate is provided with a second limiting hole, the number of the second limiting holes being an integer multiple of the number of the second mounting holes; the bottom of the second button is provided with a second pressing post, the number and position of the second pressing post corresponding to the number and position of the second limiting holes, respectively.

[0011] A further improvement of the present invention is that the second angle adjustment limiting component further includes a second connecting ring, the second connecting ring adopts a circular rotating structure with an opening, the opening of the second connecting ring is sleeved on one end of the rotating connector near the robotic arm, and a wire outlet groove is provided on the end face of the second connecting ring.

[0012] A further improvement of the present invention is that the sliding limiting component includes a fixing part, a spacer, and a pin. The fixing part has a sleeve hole in the middle, the spacer is disposed in the sleeve hole, and the fixing part is sleeved on the column through the spacer and the sleeve hole. The column has a pin hole, and the pin passes through the fixing part and is movably connected to the pin hole.

[0013] The present invention also provides a fitness equipment, including a multi-degree-of-freedom robotic arm for fitness equipment as described above, and including a column. The robotic arm is connected to the sliding limit component through a second angle adjustment limit component and a first angle adjustment limit component. The sliding limit component is connected to the column.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the first angle adjustment limiting component is movably mounted on the column of the fitness equipment through the sliding limiting component, thereby enabling height adjustment through the sliding limiting component and rapid angle adjustment in the horizontal direction through the first angle adjustment limiting component; furthermore, the robotic arm is connected to the first angle adjustment limiting component through the second angle adjustment limiting component, thereby enabling rapid angle adjustment in the vertical direction through the second angle adjustment limiting component; further still, the first angle adjustment limiting component and the second angle adjustment limiting component can share a rotating connecting member, thereby effectively improving the commonality of materials and structural design. Therefore, the present invention not only satisfies the multi-degree-of-freedom adjustment of the robotic arm, but also effectively reduces the production and assembly costs of the product, improves the commonality of materials, and well meets the adjustment needs of the robotic arm for fitness equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a multi-degree-of-freedom robotic arm according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a fitness equipment according to an embodiment of the present invention; Figure 3 This is a partial structural schematic diagram of a fitness equipment according to an embodiment of the present invention; Figure 4 This is an assembly schematic diagram of the first angle adjustment limiting component according to an embodiment of the present invention; Figure 5 This is an exploded view of a first angle adjustment limiting component according to an embodiment of the present invention; Figure 6 This is an exploded view of a first angle adjustment limiting component according to an embodiment of the present invention from another perspective; Figure 7 This is a schematic diagram of the structure of a rotating connector according to an embodiment of the present invention; Figure 8 This is a schematic diagram of an optimized structure of a first angle adjustment limiting component according to an embodiment of the present invention; Figure 9 This is an exploded view of a second angle adjustment limiting component according to an embodiment of the present invention; Figure 10 This is an exploded view of the second angle adjustment limiting component according to an embodiment of the present invention from another perspective; Figure 11 This is a schematic diagram of the optimized structure of the second angle adjustment limiting component according to an embodiment of the present invention.

[0016] Attached image labels: 1-Sliding limit assembly; 11-Fixing part; 12-Spacer; 13-Pin; 14-Sleeve hole; 2-First angle adjustment limiting component; 21-First button cover; 22-First button; 221-First pressing post; 23-First fixing plate; 231-First limiting hole; 232-First rotation limiting groove; 24-First elastic limiting member; 241-First pin; 242-First spring; 25-Rotating connector; 251-First mounting hole; 252-First rotation limiting member; 253-First groove; 254-Second groove; 255-Second mounting hole; 256-Second rotation limiting member; 26-First connecting ring; 261-Blocking end; 262-Limiting protrusion; 3-Second angle adjustment limit assembly; 31-Second button cover; 32-Second button; 321-Second pressing post; 33-Second fixing plate; 331-Second limiting hole; 332-Second rotation limiting groove; 34-Second elastic limiting component; 35-Second connecting ring; 351-Cable outlet groove; 4-Robotic arm; 5-Post; 51-Pin hole. Detailed Implementation

[0017] In the description of this invention, if directional descriptions are involved, such as "up," "down," "front," "back," "left," "right," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, it is only for the convenience of describing the invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. If a technical feature is referred to as "set," "fixed," "connected," or "installed" on another technical feature, it can be directly set, fixed, or connected to the other technical feature, or it can be indirectly set, fixed, connected, or installed on the other technical feature.

[0018] In the description of this invention, the term "several" means one or more; the term "multiple" means two or more; the terms "greater than," "less than," and "exceeding" are all understood to exclude the stated number; and the terms "above," "below," and "within" are all understood to include the stated number. The terms "first," "second," etc., are understood to be used only to distinguish identical or similar technical feature names, and should not be construed as implying / indicating the relative importance of the technical features, the number of technical features, or the sequential relationship between the technical features.

[0019] The preferred embodiments of the present invention will now be described in further detail with reference to the accompanying drawings.

[0020] like Figures 1 to 11As shown, this embodiment provides a multi-degree-of-freedom robotic arm for fitness equipment, including: a sliding limit component 1, a first angle adjustment limit component 2, a second angle adjustment limit component 3, and a robotic arm 4; the first angle adjustment limit component 2 is movably mounted on the column 5 of the fitness equipment through the sliding limit component 1, and the robotic arm 4 is connected to the first angle adjustment limit component 2 through the second angle adjustment limit component 3.

[0021] The first angle adjustment limiting component 2 includes a first button cover 21, a first button 22, a first fixing plate 23, a first elastic limiting member 24, and a rotating connector 25. The first button 22 is mounted on the first fixing plate 23 via the first button cover 21, and the first fixing plate 23 is fixedly connected to the top and bottom of the sliding limiting component 1. The rotating connector 25 is disposed between the sliding limiting component 1 and the second angle adjustment limiting component 3, and the first end of the rotating connector 25 has a first mounting hole 251 in the horizontal direction. The first elastic limiting member 24 is disposed in the first mounting hole 251 and passes through the first fixing plate 23 to abut against the first button. 22; When the first button 22 is pressed, the first elastic limiting member 24 is pressed and disengaged from the first fixed plate 23. The first elastic limiting member 24 sinks down to be fully accommodated in the first mounting hole 251. At this time, the rotating connecting member 25 can rotate relative to the first fixed plate 23, that is, there is no relative limiting effect between the first fixed plate 23 and the rotating connecting member 25, realizing the angle adjustment of the robotic arm 4 in the horizontal direction; when the angle adjustment in the horizontal direction is completed, the first button 22 is released, and the first elastic limiting member 24 is inserted into the first fixed plate 23 under the elastic action, realizing the horizontal limiting of the rotating connecting member 25 and limiting the new angle after adjustment.

[0022] In this embodiment, the first fixing plate 23 is fixedly connected to the top and bottom of the sliding limiting component 1. That is, two first fixing plates 23 are provided, one above the other, to clamp the rotating connecting member 25 in the middle. Correspondingly, the first mounting hole 251 is provided at the top and bottom of the first end of the rotating connecting member 25 for cooperating with the first elastic limiting member 24; the rotating connecting member 25 serves as a shared intermediate joint connecting member for the first angle adjusting limiting component 2 and the second angle adjusting limiting component 3. It is worth noting that, firstly, the two first fixed plates 23 are fixedly installed at the top and bottom of the sliding limiting component 1, which is limited by the column 5. Therefore, during horizontal angle adjustment, these two first fixed plates 23 remain stationary, while the central rotating connector 25 rotates. In this case, the first fixed plates 23 are not affected by the rotational torque, thus avoiding impact on their service life. Secondly, the first end of the rotating connector 25 has a first mounting hole 251 in the horizontal direction for fitting and installing the first elastic limiting component 24. The second end of the rotating connector 25 can then provide a foundation for vertical angle adjustment, enabling material sharing. The first end of the rotating connector 25 refers to the end of the rotating connector 25 closest to the sliding limiting component 1; the second end of the rotating connector 25 refers to the end of the rotating connector 25 furthest from the sliding limiting component 1.

[0023] In this embodiment, the sliding limit component 1 refers to a limiting structure used to realize the movable connection of the column 5 of the fitness equipment, and a pin limit component is preferably used. Figures 1 to 3 as well as Figure 6 As shown, the sliding limiting component 1 in this embodiment includes a fixing part 11, a spacer 12, and a pin 13. The fixing part 11 has a central hole 14, and the spacer 12 is disposed within the hole 14. The spacer 12 is preferably made of POM to prevent scratching the surface of the column 5 during sliding. The fixing part 11 is fitted onto the column 5 through the spacer 12 and the hole 14. The column 5 has a pin hole 51, and the pin 13 passes through the fixing part 11 and is movably connected to the pin hole 51. The pin 13 is an elastic pin. When height adjustment is required, i.e., Z-axis height adjustment, the pin handle of the pin 13 can be pulled outwards to disengage the pin from the pin hole 51, thus achieving Z-axis up-and-down adjustment. After adjustment, the position of the sliding limiting component 1 is fixed again through the corresponding pin hole 51, achieving the limiting function after height adjustment.

[0024] In this embodiment, the first angle adjustment limiting component 2 and the second angle adjustment limiting component 3 adopt the same structure, and are used to realize angle adjustment in the horizontal direction and the vertical direction, respectively. It should be noted that the first angle adjustment limiting component 2 and the second angle adjustment limiting component 3 share a rotating connector 25. This optimized structural design improves material sharing and reduces product production and assembly costs.

[0025] Therefore, this embodiment enables height adjustment via the sliding limit component 1 and rapid horizontal angle adjustment via the first angle adjustment limit component 2. Furthermore, the robotic arm 4 is connected to the first angle adjustment limit component 2 via the second angle adjustment limit component 3, enabling rapid vertical angle adjustment via the second angle adjustment limit component 3. Additionally, the first angle adjustment limit component 2 and the second angle adjustment limit component 3 share the same rotating connector 25, effectively improving the commonality of materials and structural design. This embodiment not only satisfies the multi-degree-of-freedom adjustment of the robotic arm—that is, the height, horizontal angle, and vertical angle adjustment of the robotic arm 4—but also effectively reduces product manufacturing and assembly costs, improves material commonality, and well meets the adjustment requirements of robotic arms used in fitness equipment.

[0026] like Figure 8 As shown, preferably, in this embodiment, the first elastic limiting member 24 includes a first pin 241 and a first spring 242, with the first spring 242 positioned directly below the first pin 241. Therefore, when the first button 22 is not pressed, under the action of the first spring 242, the first pin 241 extends from the rotating connector 25 and engages the first fixed plate 23; when the first button 22 is pressed, the first pin 241 sinks and releases the first fixed plate 23, and after the first button 22 is released, the first pin 241 automatically springs back up to achieve re-limiting.

[0027] like Figures 4 to 6 As shown, in this embodiment, the first fixed plate 23 is provided with a first limiting hole 231, and the number of the first limiting holes 231 is an integer multiple of the number of the first mounting holes 251. This integer multiple can be set and adjusted according to actual needs. For example, if the number of the first limiting holes 231 is twice the number of the first mounting holes 251, then there are two settings for horizontal angle adjustment. The bottom of the first button 22 is provided with a first pressing post 221. The number and position of the first pressing posts 221 correspond to the number and position of the first limiting holes 231, respectively, so as to facilitate corresponding assembly and pressing operation. Moreover, the height of the first pressing post 221 corresponds to the thickness of the first fixed plate 23, so that pressing the first button 22 will not interfere with the rotation of the rotating connector 25.

[0028] like Figures 5 to 7As shown, in this embodiment, the first end of the rotating connector 25 is provided with a first rotating limiting member 252 (such as a protrusion or mounting screw), and the inner side of the first fixed plate 23 is provided with a first rotating limiting groove 232. The first rotating limiting groove 232 is an arc-shaped groove, and the position of the first rotating limiting groove 232 corresponds to the position of the first rotating limiting member 252. Therefore, in addition to the limiting effect between the first fixed plate 23, the first elastic limiting member 24 and the rotating connector 25, a further limiting effect is achieved through the matching first rotating limiting member 252 and the first rotating limiting groove 232 to ensure the reliability of the product and make the structural design more reasonable and efficient.

[0029] like Figure 5 and Figure 8 As shown, in this embodiment, the first angle adjustment limiting component 2 further includes a first connecting ring 26. The first connecting ring 26 adopts a circular rotating structure with an opening. The opening of the first connecting ring 26 is sleeved on one end of the rotating connector 25 near the sliding limiting component 1, so that the relative rotation between the rotating connector 25 and the sliding limiting component 1 can be smoother through the first connecting ring 26.

[0030] like Figure 7 and Figure 8 As shown, the first end face of the rotating connector 25 in this embodiment is provided with a first groove 253 and a second groove 254. The inner wall of the first connecting ring 26 is provided with a blocking end 261 and a limiting protrusion 262. The blocking end 261 is embedded in the first groove 253, and the limiting protrusion 262 is provided in the second groove 254. This ensures that the first connecting ring 26 and the rotating connector 25 rotate synchronously, and during the rotation, the blocking end 261 can press against the internal structure of the rotating connector 25.

[0031] In this embodiment, the second angle adjustment limiting component 3 adopts the same structure as the first angle adjustment limiting component 2, and therefore can also achieve the same effect as the first angle adjustment limiting component 2 described above; the difference is that the second angle adjustment limiting component 3 is used to achieve angle adjustment in the vertical direction. Therefore, only a simple description and explanation are given below.

[0032] like Figures 9 to 11As shown, in this embodiment, the second angle adjustment limiting component 3 includes a second button cover 31, a second button 32, a second fixed plate 33, and a second elastic limiting member 34. The second button 32 is disposed on the second fixed plate 33 through the second button cover 31, and the second fixed plate 33 is fixedly connected to the robotic arm 4. The second end of the rotating connector 25 is provided with a second mounting hole 255 in the vertical direction. The second elastic limiting member 34 is disposed in the second mounting hole 255 and passes through the second fixed plate 33 to abut against the second button 32. When the second button 32 is pressed, the second elastic limiting member 34 is pressed and disengaged from the second fixed plate 33. At this time, the rotating connector 25 is limited and does not move by the first angle adjustment limiting component 2, and the second fixed plate 33 can rotate relative to the rotating connector 25 to realize the angle adjustment of the robotic arm 4 in the vertical direction. When the second button 32 is released, the second elastic limiting member 34 is inserted into the second fixed plate 33 under the action of elasticity to realize the vertical limitation of the second fixed plate 33.

[0033] like Figure 9 and Figure 10 As shown, in this embodiment, the second fixing plate 33 is provided with second limiting holes 331, and the number of second limiting holes 331 is an integer multiple of the number of second mounting holes 255; the bottom of the second button 32 is provided with second pressing posts 321, and the number and position of the second pressing posts 321 correspond to the number and position of the second limiting holes 331, respectively. Similarly, the integer multiple here can also be set and adjusted according to actual needs; the larger the multiple, the more adjustable levels are available.

[0034] like Figure 11 As shown, in this embodiment, the second angle adjustment and limiting component 3 further includes a second connecting ring 35. The second connecting ring 35 adopts a circular rotating structure with an opening, and the opening of the second connecting ring 35 is sleeved on the end of the rotating connector 25 near the robotic arm 4. Furthermore, a cable outlet groove 351 is provided on the end face of the second connecting ring 35 to provide a cable outlet structure for the robotic arm 4.

[0035] Preferred, such as Figure 7 and Figure 10 As shown, the rotating connector 25 in this embodiment also includes a second rotating limiting member 256. Correspondingly, the inner side of the second fixed plate 33 is provided with a second rotating limiting groove 332 that matches the second rotating limiting member 256. The second rotating limiting groove 332 adopts an arc-shaped groove to achieve a further limiting effect, so as to ensure the reliability of the product and make the structural design more reasonable and efficient.

[0036] like Figure 2As shown, this embodiment also provides a fitness equipment, including a multi-degree-of-freedom robotic arm for fitness equipment as described above, and a column 5. The robotic arm 4 is connected to the sliding limit component 1 through the second angle adjustment limit component 3 and the first angle adjustment limit component 2. The sliding limit component 1 is connected to the column 5.

[0037] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A multi-degree-of-freedom robotic arm for fitness equipment, characterized in that, include: The equipment includes a sliding limit assembly (1), a first angle adjustment limit assembly (2), a second angle adjustment limit assembly (3), and a robotic arm (4). The first angle adjustment limit assembly (2) is movably mounted on the column (5) of the fitness equipment via the sliding limit assembly (1), and the robotic arm (4) is connected to the first angle adjustment limit assembly (2) via the second angle adjustment limit assembly (3). The first angle adjustment limiting component (2) includes a first button cover (21), a first button (22), a first fixed plate (23), a first elastic limiting member (24), and a rotating connector (25). The first button (22) is mounted on the first fixed plate (23) via the first button cover (21). The first fixed plate (23) is fixedly connected to the top and bottom of the sliding limiting component (1). The rotating connector (25) is located between the sliding limiting component (1) and the second angle adjustment limiting component (3), and the first end of the rotating connector (25) has a first mounting hole in the horizontal direction. 251); The first elastic limiting member (24) is disposed in the first mounting hole (251) and passes through the first fixed plate (23) to abut against the first button (22); when the first button (22) is pressed, the first elastic limiting member (24) is pressed and disengaged from the first fixed plate (23). At this time, the rotating connector (25) can rotate relative to the first fixed plate (23); when the first button (22) is released, the first elastic limiting member (24) is inserted into the first fixed plate (23) under elastic action, thereby limiting the rotating connector (25) in the horizontal direction.

2. The multi-degree-of-freedom robotic arm for fitness equipment according to claim 1, characterized in that, The first elastic limiting member (24) includes a first pin (241) and a first spring (242), with the first spring (242) disposed directly below the first pin (241).

3. The multi-degree-of-freedom robotic arm for fitness equipment according to claim 1, characterized in that, The first fixed plate (23) is provided with a first limiting hole (231), the number of the first limiting holes (231) is an integer multiple of the number of the first mounting holes (251); the bottom of the first button (22) is provided with a first pressing post (221), the number and position of the first pressing post (221) correspond to the number and position of the first limiting hole (231); and the height of the first pressing post (221) corresponds to the thickness of the first fixed plate (23).

4. The multi-degree-of-freedom robotic arm for fitness equipment according to claim 1, characterized in that, The first end of the rotating connector (25) is provided with a first rotating limit member (252), and the inner side of the first fixed plate (23) is provided with a first rotating limit groove (232). The position of the first rotating limit groove (232) corresponds to the position of the first rotating limit member (252).

5. The multi-degree-of-freedom robotic arm for fitness equipment according to any one of claims 1 to 4, characterized in that, The first angle adjustment limiting component (2) further includes a first connecting ring (26), which adopts a circular rotating structure with an opening. The opening of the first connecting ring (26) is sleeved on one end of the rotating connector (25) near the sliding limiting component (1). The first end face of the rotating connector (25) is provided with a first groove (253) and a second groove (254). The inner wall of the first connecting ring (26) is provided with a blocking end (261) and a limiting protrusion (262). The blocking end (261) is embedded in the first groove (253), and the limiting protrusion (262) is provided in the second groove (254).

6. The multi-degree-of-freedom robotic arm for fitness equipment according to any one of claims 1 to 4, characterized in that, The second angle adjustment limiting component (3) includes a second button cover (31), a second button (32), a second fixed plate (33), and a second elastic limiting member (34). The second button (32) is mounted on the second fixed plate (33) through the second button cover (31), and the second fixed plate (33) is fixedly connected to the robotic arm (4). The second end of the rotating connector (25) is provided with a second mounting hole (255) in the vertical direction. The second elastic limiting member (34) is disposed in the second mounting hole (255) and passes through the second fixed plate (33) to abut against the second button (32). When the second button (32) is pressed, the second elastic limiting member (34) is pressed and disengaged from the second fixed plate (33). At this time, the second fixed plate (33) can rotate relative to the rotating connector (25). When the second button (32) is released, the second elastic limiting member (34) is inserted into the second fixed plate (33) under elastic action to limit the second fixed plate (33) in the vertical direction.

7. The multi-degree-of-freedom robotic arm for fitness equipment according to claim 6, characterized in that, The second fixed plate (33) is provided with a second limiting hole (331), the number of the second limiting holes (331) is an integer multiple of the number of the second mounting holes (255); the bottom of the second button (32) is provided with a second pressing post (321), the number and position of the second pressing post (321) correspond to the number and position of the second limiting hole (331) respectively.

8. The multi-degree-of-freedom robotic arm for fitness equipment according to claim 6, characterized in that, The second angle adjustment limiting component (3) also includes a second connecting ring (35). The second connecting ring (35) adopts a circular rotating structure with an opening. The opening of the second connecting ring (35) is sleeved on one end of the rotating connector (25) near the robotic arm (4), and a wire outlet groove (351) is provided on the end face of the second connecting ring (35).

9. The multi-degree-of-freedom robotic arm for fitness equipment according to any one of claims 1 to 4, characterized in that, The sliding limiting component (1) includes a fixing part (11), a spacer (12) and a pin (13). The fixing part (11) has a sleeve hole (14) in the middle. The spacer (12) is disposed in the sleeve hole (14). The fixing part (11) is sleeved on the column (5) through the spacer (12) and the sleeve hole (14). The column (5) has a pin hole (51). The pin (13) passes through the fixing part (11) and is movably connected to the pin hole (51).

10. A fitness equipment, characterized in that, It includes a multi-degree-of-freedom robotic arm for fitness equipment as described in any one of claims 1 to 9, and includes a column (5), wherein the robotic arm (4) is connected to the sliding limit component (1) via the second angle adjustment limit component (3) and the first angle adjustment limit component (2), and the sliding limit component (1) is connected to the column (5).

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