Bearing and trainer provided with same

Abstract

The bearing is arranged on a rotating shaft between two rotating parts which rotate relatively in a sleeving mode, the bearing comprises an outer rotating body, an inner rotating body and a transmission part, the outer rotating body is arranged in one rotating part, the inner rotating body is arranged in the outer rotating body in a relatively rotating mode, and the transmission part is arranged in the outer rotating body. Any end of the inner rotating body extends out of the outer rotating body to abut against the other rotating part, so that a preset distance is kept between the two rotating parts, and a plurality of transmission parts are arranged between the outer rotating body and the inner rotating body to reduce rotating friction; the outer rotating body is arranged in one rotating part, one end of the inner rotating body extends out of the outer rotating body to abut against the other rotating part, so that the bearing is limited to move in the axial direction through the opposite acting force of the other rotating part, the preset distance is kept between the two rotating parts, and relative rotation between the two rotating parts is not interfered; extra mounting of spacer bushes is not needed, so that the assembly efficiency is improved, and the mounting steps of the trainer are simplified.

Description

Technical Field

[0001] This application belongs to the field of fitness equipment technology, and in particular relates to a bearing and a training device equipped with the bearing. Background Technology

[0002] In recent years, with the popularization of fitness awareness, the number of people exercising has continued to rise, which in turn has led to a continuous increase in the demand for fitness equipment.

[0003] The existing training device includes two rotating parts, a bearing, and a spacer. The two rotating parts are arranged to rotate relative to each other. The bearing is located between the two rotating parts to reduce rotational friction. The spacer is located between one of the rotating parts and the bearing to maintain a preset distance between the rotating parts and the bearing and to prevent the bearing from moving along its axial direction.

[0004] However, the bearings are small in size, and the corresponding spacers are also small in size, making it very inconvenient to assemble or weld the spacers, and they are easy to lose. Utility Model Content

[0005] To address the shortcomings of related technologies, this application provides a bearing and a training device equipped with the bearing. The bearing is sleeved on a shaft between two relatively rotating components. By placing an outer rotating body inside one rotating component and setting one end of an inner rotating body to extend out of the outer rotating body to abut against the other rotating component, the bearing's axial movement is restricted by the reverse force of the other rotating component, and the two rotating components maintain a preset distance, without interfering with the relative rotation between the two rotating components. Furthermore, no additional spacer is required, which improves assembly efficiency and simplifies the training device installation steps.

[0006] On one hand, this application provides a bearing sleeved on a shaft between two relatively rotating components, the bearing comprising:

[0007] An outer rotating body, wherein at least one end of the outer rotating body is open and the interior is hollow, and the outer rotating body is disposed within one of the rotating components;

[0008] An inner rotating body is rotatably disposed within the outer rotating body, and one end of the inner rotating body extends out of the outer rotating body through the opening to abut against another rotating component, thereby maintaining a preset distance between the two rotating components;

[0009] A transmission component, wherein a plurality of the transmission components are disposed between the outer rotating body and the inner rotating body, the transmission components being used to roll relative to the outer rotating body or the inner rotating body to reduce friction when the outer rotating body and the inner rotating body rotate relative to each other;

[0010] When the outer rotating body and the inner rotating body rotate relative to each other based on the preset distance, the two rotating components rotate relative to each other simultaneously based on the preset distance without interfering with each other, and the friction during relative rotation is reduced by the transmission component.

[0011] In some embodiments, the bearing further includes:

[0012] A first limiting structure is used to restrict the transmission member from rolling along the rotation axis of the outer rotating body or the inner rotating body.

[0013] In some embodiments, the first limiting structure includes:

[0014] The first baffle is disposed on one side of the transmission component and located between the outer rotating body and the inner rotating body;

[0015] The second baffle is disposed on the other side of the transmission member, opposite to the first baffle, and is located between the outer rotating body and the inner rotating body.

[0016] In some embodiments, the first baffle, the second baffle, the inner rotating body, and the outer rotating body together form a limiting space to prevent the transmission member from disengaging from the position between the inner rotating body and the outer rotating body.

[0017] In some embodiments, the bearing further includes:

[0018] The two ends of the transmission component respectively abut against the inner wall of the outer rotating body and the outer wall of the inner rotating body;

[0019] A first limiting groove surrounds the inner rotating body and is formed on the outer wall of the inner rotating body. One end of the transmission member extends into the first limiting groove, and the transmission member rolls around the outer wall of the inner rotating body along the first limiting groove.

[0020] The second limiting groove surrounds the outer rotating body and is formed on the inner wall of the outer rotating body. One end of the transmission member extends into the second limiting groove, and the transmission member rolls around the inner wall of the outer rotating body along the second limiting groove.

[0021] On the other hand, this application also provides a training device equipped with the bearing described in any of the above claims. The training device includes at least two rotating components that are rotatably arranged relative to each other. The bearing is sleeved on a shaft between the two rotating components to reduce friction and maintain a preset distance between the two rotating components when they rotate relative to each other.

[0022] In some embodiments, the two rotating components arranged in relative rotation are the base frame assembly and the power arm, respectively.

[0023] The power arm is rotatably mounted on the base frame assembly, the rotating shaft passes through the power arm and is connected to the base frame assembly, and the power arm rotates relative to the base frame assembly via the rotating shaft;

[0024] The inner rotating body is sleeved on the rotating shaft, and the outer rotating body is disposed on the power arm. Either end of the inner rotating body extends out of the outer rotating body to abut against the base frame assembly, so that the power arm and the base frame assembly can rotate relative to each other without interference based on the preset distance.

[0025] In some embodiments, the base frame assembly includes:

[0026] Erecting the frame;

[0027] An extension member, one end of which is fixed to the upright, and the other end of which is connected to the rotating shaft and abuts against the inner rotating body.

[0028] In some embodiments, the trainer further includes:

[0029] A bearing hole is formed on the power arm. The inner wall of the bearing hole abuts against the outer wall of the outer rotating body. One end of the inner rotating body extends outward from the outer rotating body and abuts against the extension on one side of the bearing hole.

[0030] In some embodiments, the trainer further includes:

[0031] A stop boss is provided inside the bearing hole. The stop boss is used to restrict the bearing to prevent the bearing from moving along its rotational axis.

[0032] In summary, this application provides a bearing and a training device equipped with the bearing. The bearing is sleeved on a shaft between two relatively rotating components. By placing an outer rotating body inside one rotating component and having one end of an inner rotating body extend out of the outer rotating body to abut against the other rotating component, the bearing's axial movement is restricted by the reverse force of the other rotating component, and the two rotating components maintain a preset distance, without interfering with the relative rotation between the two rotating components. Furthermore, no additional spacer is required, improving assembly efficiency and simplifying the training device installation process. A first limiting structure restricts the transmission component from rolling along the rotation axis of the outer or inner rotating body, thereby ensuring stable operation of the transmission component. The first and second baffles isolate external interference, preventing dust and debris from interfering with the operation of the transmission components. The limiting space restricts the transmission components to prevent them from disengaging from the position between the inner and outer rotating bodies. The second limiting structure restricts the transmission components from rolling along the rotational axis of the outer or inner rotating body, ensuring stable operation. The first and second limiting grooves ensure the transmission components move along a preset trajectory, further guaranteeing stable operation. An extension component expands the relative flexibility of the power arm and the upright. Bearing holes facilitate bearing connection to rotating components. A stop boss restricts the bearing, preventing it from moving along its rotational axis.

[0033] Other features and advantages of this application will be set forth in the description which follows, and in part will be obvious from the description or may be learned by practicing the invention. The objectives and other advantages of this application may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0034] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0035] Figure 1 This is a front view of the bearing in this application;

[0036] Figure 2 For this application Figure 1 Schematic diagram of AA section;

[0037] Figure 3 This is an assembly diagram of the trainer in this application when the bearing is installed.

[0038] In the picture:

[0039] 100. Outer rotating body; 200. Inner rotating body; 300. Transmission component; 400. First baffle; 500. Second baffle; 600. Base frame assembly; 601. Vertical frame; 602. Extension component; 700. Power arm; 701. Bearing hole; 800. Rotating shaft. Detailed Implementation

[0040] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0041] In the description of this application, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do 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. Therefore, they should not be construed as limitations on this application.

[0042] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Specific Implementation Example 1

[0045] Reference Appendix Figure 1 To be continued Figure 3 , Figure 1 This is a front view of the bearing in this application. Figure 2 For this application Figure 1 Schematic diagram of AA section; Figure 3 This is an assembly diagram of the trainer in this application when the bearing is installed; the following is in conjunction with the attached diagram. Figure 1 To be continued Figure 3 Specific embodiments are described below.

[0046] Reference Appendix Figure 1 With appendix Figure 2 This application provides a bearing, including an outer rotating body 100, an inner rotating body 200, and transmission components 300. The bearing is sleeved on a shaft 800 between two relatively rotating components. The outer rotating body 100 is open at least one end and hollow inside, and is disposed on one of the rotating components. The inner rotating body 200 is relatively rotatably disposed inside the outer rotating body 100, and any end of the inner rotating body 200 extends out of the outer rotating body 100 through the opening to abut against the other rotating component, so that a preset distance is maintained between the two rotating components. A plurality of transmission components 300 are disposed between the outer rotating body 100 and the inner rotating body 200. The transmission components 300 are used to roll relative to the outer rotating body 100 or the inner rotating body 200 to reduce the friction when the outer rotating body 100 and the inner rotating body 200 rotate relative to each other.

[0047] When the outer rotating body 100 and the inner rotating body 200 rotate relative to each other based on a preset distance, the two rotating parts rotate relative to each other simultaneously based on the preset distance without interfering with each other, and the friction during relative rotation is reduced by the transmission component 300.

[0048] It should be noted that the preset spacing is the axial interval between the two rotating parts to avoid contact and friction between the two rotating parts.

[0049] Specifically, the outer rotating body 100 is made of materials including but not limited to high-strength alloy steel, which improves the load-bearing capacity and wear resistance of the outer rotating body 100 and extends the service life of the bearing.

[0050] The outer rotating body 100 is a cylindrical or cylindrical component with one end open and the interior hollow, so that the inner rotating body 200 can pass through and partially extend out.

[0051] The outer surface of the outer rotating body 100 is precision machined, which ensures the accuracy and stability of bearing installation, reduces performance degradation caused by improper installation, ensures close matching with the installation environment, and lays the foundation for stable bearing operation.

[0052] The inner rotating body 200 is made of materials including but not limited to high-strength alloy steel. The shape of the inner rotating body 200 matches that of the outer rotating body 100. The outer diameter of the inner rotating body 200 is smaller than the inner diameter of the outer rotating body 100 so that it can rotate freely within the outer rotating body 100.

[0053] One end of the inner rotating body 200 extends through the opening of the outer rotating body 100 to form a boss-like abutment surface, which is used to make close contact with other components, thereby keeping other components at a preset distance from the outer rotating body 100 and ensuring that other components avoid contact and friction with the outer rotating body 100 when rotating relative to the outer rotating body 100.

[0054] Furthermore, by setting one end of the inner rotating body 200 to extend out of the outer rotating body 100 to abut against other components, the bearing's axial movement is limited by the counterforce of the other components, maintaining a preset distance. This eliminates the need for additional spacers, improving assembly efficiency and simplifying the training device installation process.

[0055] The transmission component 300 includes, but is not limited to, balls or rollers, and multiple transmission components 300 are evenly distributed between the outer rotating body 100 and the inner rotating body 200.

[0056] Ball bearings or rollers serve as transmission components 300. The inner rotating body 200 is supported within the outer rotating body 100 by the transmission components 300, which can significantly reduce the friction between the outer rotating body 100 and the inner rotating body 200 during relative rotation, reduce energy consumption and temperature rise, and the multiple evenly distributed transmission components 300 ensure the smooth operation and long service life of the bearing.

[0057] In some embodiments, a lubrication channel or lubrication hole is provided between the inner rotating body 200 and the outer rotating body 100 for storing and supplying lubricant, including but not limited to grease or lubricating oil.

[0058] The lubricant can be evenly distributed to all transmission components 300 and raceways through lubrication channels or lubrication holes, further reducing friction and wear between the outer rotating body 100 and the inner rotating body 200, and improving the operating efficiency and life of the bearing.

[0059] In some embodiments, the bearing is also provided with an automatic lubrication device, which is used to automatically replenish lubricant according to the operating condition of the bearing, so as to ensure that the bearing always maintains a good lubrication condition during long-term operation.

[0060] The automatic lubrication device includes a spring-capped oil cup and a connecting tube. It uses capillary action to draw the lubricant in the spring-capped oil cup onto the bearing through a core made of twisted wool or cotton thread. The design of the spring-capped oil cup can maintain a certain oil pressure to ensure a continuous supply of lubricant.

[0061] Reference Appendix Figure 1 With appendix Figure 2 In some embodiments, the bearing is provided with a first limiting structure, which is used to restrict the transmission member 300 from rolling along the rotation axis of the outer rotating body 100 or the inner rotating body 200. The first limiting structure includes a first baffle 400 and a second baffle 500. The first baffle 400 is disposed on one side of the transmission member 300 and located between the outer rotating body 100 and the inner rotating body 200. The second baffle 500 is disposed on the other side of the transmission member 300 opposite to the first baffle 400 and is located between the outer rotating body 100 and the inner rotating body 200.

[0062] Specifically, the first baffle 400 and the second baffle 500 are fixed on the outer rotating body 100 and located on one side of the transmission member 300. The second baffle 500 is fixed on the other side of the transmission member 300 relative to the first baffle 400. The first baffle 400 and the second baffle 500 are located between the outer rotating body 100 and the inner rotating body 200.

[0063] The first baffle 400 and the second baffle 500 are fixed to the inner wall of the outer rotating body 100 by bolts, welding or other means. The first baffle 400 and the second baffle 500 are used to prevent the transmission component 300 from rolling to both sides when subjected to axial force. In addition, the first baffle 400 and the second baffle 500 can block dust or debris from entering the bearing and ensure the stable operation of the transmission component 300.

[0064] The first baffle 400 and the second baffle 500 should be made of wear-resistant, corrosion-resistant and strong materials. The materials used to make the first baffle 400 and the second baffle 500 include, but are not limited to, steel or alloy materials, to ensure that the baffles are not easily damaged during long-term use and to maintain the stability of their limiting function.

[0065] Reference Appendix Figure 2 In some embodiments, the first baffle 400, the second baffle 500, the inner rotating body 200, and the outer rotating body 100 together form a limiting space to prevent the transmission member 300 from disengaging from the position between the inner rotating body 200 and the outer rotating body 100.

[0066] When the transmission component 300 moves radially along the rotation axis, the lateral movement of the transmission component 300 is restricted by the inner rotating body 200 and the outer rotating body 100; when the transmission component 300 moves axially along the rotation axis, the longitudinal movement of the transmission component 300 is restricted by the first baffle 400 and the second baffle 500; the limiting space formed by the first baffle 400, the second baffle 500, the inner rotating body 200 and the outer rotating body 100 is used to ensure that the transmission component 300 operates stably inside it and to prevent the transmission component 300 from leaving the position between the inner rotating body 200 and the outer rotating body 100.

[0067] In other embodiments, the two ends of the transmission member 300 abut against the inner wall of the outer rotating body 100 and the outer wall of the inner rotating body 200, respectively; the bearing is provided with a second limiting structure, which is used to restrict the transmission member 300 from rolling along the rotation axis of the outer rotating body 100 or the inner rotating body 200. The second limiting structure includes a first limiting groove, which surrounds the inner rotating body 200 and is formed on the outer wall of the inner rotating body 200. One end of the transmission member 300 extends into the first limiting groove, and the transmission member 300 rolls around the outer wall of the inner rotating body 200 along the first limiting groove.

[0068] Specifically, the two ends of the transmission component 300 abut against the inner wall of the outer rotating body 100 and the outer wall of the inner rotating body 200, respectively, to ensure that the transmission component 300 can stably transmit power during rotation. Furthermore, since both ends of the transmission component 300 are supported, the swaying of the transmission component 300 in the axial direction is reduced.

[0069] The first limiting groove surrounds the inner rotating body 200 and is formed on the outer wall of the inner rotating body 200. The width of the first limiting groove is set to match the outer diameter of the transmission component 300 to ensure that one end of the transmission component 300 can smoothly extend into the first limiting groove and roll along the outer wall of the inner rotating body 200 in the groove.

[0070] The depth of the first limiting groove is set in accordance with the outer diameter of the transmission component 300, so as to prevent the transmission component 300 from coming out of the first limiting groove and to avoid generating excessive frictional resistance.

[0071] In some embodiments, the second limiting structure further includes a second limiting groove, which surrounds the outer rotating body 100 and is formed on the inner wall of the outer rotating body 100. One end of the transmission member 300 extends into the second limiting groove, and the transmission member 300 rolls along the second limiting groove around the outer wall of the inner rotating body 200.

[0072] The second limiting groove surrounds the outer rotating body 100 and is formed on the inner wall of the outer rotating body 100. The width of the second limiting groove is set to match the outer diameter of the transmission component 300 to ensure that one end of the transmission component 300 can smoothly extend into the second limiting groove and roll along the inner wall of the outer rotating body 100 in the groove.

[0073] The depth of the second limiting groove is set in accordance with the outer diameter of the transmission component 300. This is to prevent the transmission component 300 from coming out of the second limiting groove, while also avoiding excessive frictional resistance.

[0074] The second limiting groove cooperates with the first limiting groove to limit the transmission component 300, ensuring that the transmission component 300 moves along the preset trajectory, and further ensuring the stable operation of the transmission component 300; and because the contact area between the transmission component 300 and the inner rotating body 200 and the outer rotating body 100 is increased, friction loss is reduced and transmission efficiency is improved. Specific Implementation Example 2

[0076] Reference Appendix Figure 3 This application also provides a training device, on which the bearing described in the first specific embodiment is mounted.

[0077] The trainer includes at least two rotating parts arranged in a relative rotational configuration, with a bearing installed between the two rotating parts to reduce friction and maintain a preset distance when the two rotating parts rotate relative to each other.

[0078] The outer rotating body 100 of the bearing is mounted on one of the rotating components. One end of the inner rotating body 200 of the bearing extends out of the outer rotating body 100 to abut against the other rotating component. Thus, the reverse force applied by the rotating component to the inner rotating body 200 restricts the entire bearing from moving along its axial direction and keeps the two rotating components at a preset distance. No additional spacer is required, which improves assembly efficiency and simplifies the installation steps of the trainer.

[0079] Reference Appendix Figure 3 In some embodiments, the two relatively rotatable components include a base frame assembly 600 and a power arm 700. The power arm 700 is rotatably mounted on the base frame assembly 600. A rotating shaft 800 passes through the power arm 700 and is connected to the base frame assembly 600. The power arm 700 rotates relative to the base frame assembly 600 via the rotating shaft 800. An inner rotating body is sleeved on the rotating shaft 800, and an outer rotating body is mounted on the power arm 700. Either end of the inner rotating body extends out of the outer rotating body to abut against the base frame assembly 600, so that the power arm 700 and the base frame assembly 600 can rotate relative to each other without interference based on a preset distance.

[0080] Specifically, the base frame assembly 600 is fixed on a bearing plane as a fixed base frame. The power arm 700 is rotatably mounted on the base frame assembly 600 and rotates relative to it. The power arm 700 is equipped with a handle and a counterweight bar. The user pushes the power arm 700 to rotate relative to the base frame assembly 600 through the handle to exercise. The counterweight bar is used to load counterweights.

[0081] The rotating shaft 800 is mounted on the power arm 700. Both ends of the rotating shaft 800 extend out of the power arm 700 and are connected to the base frame assembly 600 respectively. Two bearings are provided at both ends of the rotating shaft 800 so that the base frame assembly 600 and both ends of the power arm 700 maintain a preset distance.

[0082] The inner rotating body of the bearing is sleeved on the rotating shaft 800, and the outer rotating body of the bearing is fixed on the power arm 700. Either end of the inner rotating body extends out of the outer rotating body to abut against the base frame assembly 600.

[0083] When the power arm 700 rotates relative to the base frame assembly 600, the power arm 700 drives the outer rotating body to rotate relative to the inner rotating body of the base frame assembly 600.

[0084] Based on the boss-type setting where the inner rotating body extends out of the outer rotating body, the power arm 700 and the base frame assembly 600 maintain a preset distance so that they can rotate relative to each other without interfering with each other.

[0085] The friction between the power arm 700 and the base frame assembly 600 is reduced by the rolling of the transmission components between the inner and outer rotating bodies.

[0086] Reference Appendix Figure 3 In some embodiments, the base frame assembly 600 includes a stand 601 and an extension 602, one end of which is fixed to the stand 601, and the other end is connected to the pivot 800 and abuts against the inner rotating body.

[0087] Specifically, the support frame 601 is fixed on the bearing plane as a base frame, and the power arm 700 is located on one side of the support frame 601 and is rotatably connected to the support frame 601.

[0088] The extension 602 extends the position of the upright 601 connected to the pivot 800 and the position of the inner rotating body, thereby making the relative positional relationship between the upright 601 and the power arm 700 more flexible and adapting to the design requirements of some special scenarios.

[0089] The rotating shaft 800 is mounted on the power arm 700. Both ends of the rotating shaft 800 extend out of the power arm 700 and are connected to one end of the two extension members 602 respectively. The other ends of the two extension members 602 are fixed to the upright frame 601 by bolts. Two bearings are provided at both ends of the rotating shaft 800 so that the extension members 602 and both ends of the power arm 700 maintain a preset distance.

[0090] The inner rotating body of the bearing is sleeved on the rotating shaft 800, and the outer rotating body of the bearing is fixed on the power arm 700. Either end of the inner rotating body extends out of the outer rotating body to abut against the extension member 602.

[0091] When the power arm 700 rotates relative to the extension 602, the power arm 700 drives the outer rotating body to rotate relative to the inner rotating body that is in contact with the extension 602.

[0092] Based on the boss-type setting where the inner rotating body extends out of the outer rotating body, the power arm 700 and the extension 602 maintain a preset distance to rotate relative to each other without interference, that is, the power arm 700 and the upright 601 maintain a preset distance to rotate relative to each other without interference.

[0093] The friction between the power arm 700 and the extension 602 during relative rotation is reduced by the rolling of the transmission component 300 between the inner and outer rotating bodies.

[0094] Reference Appendix Figure 3 In some embodiments, the power arm 700 is also provided with a bearing hole 701, the inner wall of the bearing hole 701 abuts against the outer wall of the outer rotating body 100, and one end of the inner rotating body 200 extends outward from the bearing hole 701 to abut against the extension 602 on one side of the bearing hole 701.

[0095] The bearing hole 701 is used to install the bearing. The inner wall of the bearing hole 701 abuts against the outer wall of the outer rotating body 100 so that the outer rotating body 100 and the power arm 700 with the bearing hole 701 are relatively fixed. The inner rotating body 200 extends out of the outer rotating body 100 and extends out of the bearing hole 701 to abut against the extension 602 on one side of the bearing hole 701, so that the inner rotating body 200 and the extension 602 are relatively fixed.

[0096] When the power arm 700 and the extension 602 rotate relative to each other, it is converted into relative rotation between the outer rotating body 100 and the inner rotating body 200. Based on the boss-type setting of the inner rotating body 200 extending out of the outer rotating body 100, a preset distance is maintained between the power arm 700 and the extension 602, and the friction between the power arm 700 and the extension 602 during relative rotation is reduced by the transmission component 300.

[0097] In some embodiments, a stop boss is provided in the bearing hole 701 to restrict the bearing and prevent the bearing from moving along its rotation axis.

[0098] Specifically, the stop boss is provided on the inner wall of the bearing hole 701. The stop boss is used to restrict the bearing from moving along its rotation axis, thereby preventing the bearing from going deep into the bearing hole 701, or preventing the bearing from coming out of the bearing hole 701.

[0099] This application provides a bearing and a training device equipped with it. The bearing is sleeved on a rotating shaft 800 between a relatively rotating power arm 700 and a base frame assembly 600. By placing an outer rotating body 100 inside the power arm 700 and providing one end of an inner rotating body 200 extending out of the outer rotating body 100 to abut against the base frame assembly 600, the reverse force of the base frame assembly 600 restricts the bearing's axial movement and maintains a preset distance between the power arm 700 and the base frame assembly 600, without interfering with the relative rotation between the power arm 700 and the base frame assembly 600. Furthermore, no additional spacer is required, improving assembly efficiency and simplifying the training device installation process. A first limiting structure restricts the transmission component 300 from rolling along the rotation axis of the outer rotating body 100 or the inner rotating body 200, thereby ensuring the stable operation of the transmission component 300. A second limiting structure further restricts the transmission component 300 from rolling along the rotation axis of the outer rotating body 100 or the inner rotating body 200. The first baffle 400 and the second baffle 500 isolate external interference to prevent dust and debris from interfering with the operation of the transmission component 300; the limiting space limits the transmission component 300 to prevent it from disengaging from the position between the inner rotating body 200 and the outer rotating body 100; the second limiting structure restricts the transmission component 300 from rolling along the rotation axis of the outer rotating body 100 or the inner rotating body 200, thereby ensuring the stable operation of the transmission component 300; the extension 602 expands the relative setting flexibility of the power arm 700 and the stand 601; the first limiting groove and the second limiting groove ensure that the transmission component 300 moves along a preset trajectory, further ensuring the stable operation of the transmission component 300; the bearing hole 701 allows for the installation of bearings, facilitating the connection of bearings to rotating components; the stop boss limits the bearings, preventing them from moving along their rotation axis.

[0100] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0101] The above embodiments are only used to illustrate the technical solutions of this application and not to limit them; although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this application or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in this application.

Claims

1. A bearing for fitting on a rotating shaft between two rotating members rotating in opposite directions, characterized in that, The bearing comprises: an outer rotor, which is open at least one end and hollow inside, and is arranged in one of the rotating parts; an inner rotor, which is arranged in the outer rotor in a relative rotation manner, and any end of the inner rotor extends out of the outer rotor through the opening to abut against the other rotating part, so that the two rotating parts keep a preset interval; a plurality of transmission members, which are arranged between the outer rotor and the inner rotor, and are used to roll relative to the outer rotor or the inner rotor to reduce the friction when the outer rotor and the inner rotor rotate relative to each other; when the outer rotor and the inner rotor rotate relative to each other based on the preset interval, the two rotating parts rotate relative to each other without interference based on the preset interval, and the friction is reduced by the transmission members when rotating relative to each other.

2. The bearing of claim 1, wherein Further comprising: a first limiting structure, which is used to limit the axial rolling of the transmission member along the rotation axis of the outer rotor or the inner rotor.

3. The bearing of claim 2, wherein, The first limiting structure comprises: a first baffle, which is arranged on one side of the transmission member and between the outer rotor and the inner rotor; a second baffle, which is arranged on the other side of the transmission member relative to the first baffle, and is located between the outer rotor and the inner rotor.

4. The bearing of claim 3, wherein The first baffle, the second baffle, the inner rotor and the outer rotor form a limiting space to avoid the transmission member from deviating from the position between the inner rotor and the outer rotor.

5. The bearing of claim 1, wherein Further comprising: the two ends of the transmission member abut against the inner wall of the outer rotor and the outer wall of the inner rotor, respectively; a first limiting groove, which surrounds the inner rotor and is arranged on the outer wall of the inner rotor, and one end of the transmission member extends into the first limiting groove, and the transmission member rolls along the outer wall of the inner rotor around the first limiting groove; a second limiting groove, which surrounds the outer rotor and is arranged on the inner wall of the outer rotor, and one end of the transmission member extends into the second limiting groove, and the transmission member rolls along the inner wall of the outer rotor around the second limiting groove.

6. A trainer provided with a bearing according to any one of the preceding claims 1 to 5, characterized in that The trainer comprises at least two rotating parts arranged in a relative rotation manner, and the bearing is arranged on a rotating shaft between the two rotating parts to reduce the friction and keep a preset interval when the two rotating parts rotate relative to each other through the bearing.

7. The trainer of claim 6, wherein, The two rotating parts arranged in a relative rotation manner are a chassis assembly and a power arm, respectively; the power arm is arranged in a rotation manner on the chassis assembly, the rotating shaft passes through the power arm and is connected with the chassis assembly, and the power arm rotates relative to the chassis assembly through the rotating shaft; the inner rotor is arranged on the rotating shaft, the outer rotor is arranged on the power arm, and any end of the inner rotor extends out of the outer rotor to abut against the chassis assembly, so that the power arm and the chassis assembly rotate relative to each other without interference based on the preset interval.

8. The trainer of claim 7, wherein, The chassis assembly comprises: a stand; an extension member, one end of which is fixedly arranged on the stand, and the other end is connected with the rotating shaft and abuts against the inner rotor.

9. The trainer according to claim 8, characterized in that, Further comprising: A bearing hole is formed in the power arm, an inner wall of the bearing hole abuts against an outer wall of the outer rotor, and the inner rotor extends out of one end of the outer rotor to correspondingly abut against the extension member on one side of the bearing hole.

10. The trainer of claim 9, wherein, Also included are: A gear position boss is arranged in the bearing hole, and the gear position boss is used to limit the bearing to avoid axial movement of the bearing along its rotation axis.

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