Threading universal joint

Abstract

The utility model discloses a threading universal joint which comprises a body, a supporting body, a connecting piece and a threading hole. The body comprises a rotating shaft which is provided with a roller; the supporting body is arranged at one end of the body, a connecting piece is arranged on the supporting body, and the connecting piece comprises at least two bearings; the connecting piece is connected with an external movement use end; the threading hole is formed in the rotating shaft, penetrates through the rotating shaft and extends from the external movement use end to the roller. According to the universal joint, the two sides of the connecting piece are each internally provided with one bearing to replace an original single bearing, and the stability and durability of the universal joint can be remarkably improved. By means of the improvement, loads can be dispersed more effectively, abrasion can be reduced more effectively, the possibility of deformation and abrasion is reduced, the rigidity of the whole structure is enhanced, gaps between the connecting piece and the rotating shaft are reduced in the high-strength training process, and motion stability and accuracy are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of sports equipment, in particular to a threading universal joint. Background Art

[0002] The threading universal joint, as a specialized connection component, plays a vital role in fitness equipment, mainly used to effectively transmit motion force. Its application is very common, not only can be seen in treadmills and spinning bikes, but also widely used in fitness equipment such as rowing machines. When these devices are in operation, wires or ropes, as a medium for transmitting motion force, need to maintain flexibility and adaptability to changes in direction. The ingenious design of the threading universal joint lies in its ability to rotate freely in multiple directions, ensuring that the wires or ropes can still smoothly transmit force in complex motion paths, thereby achieving smooth operation of the equipment.

[0003] The most important thing about the universal joint during use is to meet the performance requirements of fitness equipment in specific application scenarios, such as bearing frequent reciprocating and high-intensity motion loads, and adapting to complex and changeable motion trajectories. In the traditional universal joint design, the core part, the universal joint body, is closely connected to the bearing to ensure stability. When the bearing rotates, the universal joint body will also rotate synchronously. On the other hand, the connector on the universal joint is fixed to the arm on the fitness equipment by external threads. However, in actual use, especially during high-intensity training, there is a clear gap between the connector and the shaft, which leads to instability of the universal joint during rotation, which manifests as a certain degree of shaking. This shaking not only affects the training effect, but may also have an adverse effect on the service life of the fitness equipment. Utility Model Content

[0004] According to an embodiment of the utility model, in order to solve the above-mentioned deficiencies in the prior art, a threading universal joint is provided, comprising a main body, a support body, a connecting member, and a threading hole; the main body comprises a rotating shaft, on which a roller is provided; the support body is arranged at one end of the main body, on which a connecting member is provided, and the connecting member comprises at least two bearings; the connecting member is connected to the external movement use end; the threading hole is arranged inside the rotating shaft and passes through the rotating shaft, and the threading hole extends from the external movement use end toward the direction of the roller.

[0005] Preferably, the connection member comprises a pair of bearings.

[0006] Preferably, a pair of bearings are respectively arranged at two ends of the connecting member.

[0007] Preferably, a pair of bearings are respectively provided with ribs, and each rib is arranged on the outside of the connecting piece.

[0008] Preferably, the support body further comprises a retaining spring, which is arranged at one end of the bearing away from the roller, and the retaining spring is clamped on the rotating shaft.

[0009] Preferably, the radius of the threading hole is 0.5 to 0.8 times the radius of the rotating shaft.

[0010] Preferably, the radius of the threading hole is 2 / 3 times the radius of the rotating shaft.

[0011] Preferably, a groove is provided on the outer side of the body, and the groove is coupled with the outer threading ball portion.

[0012] Preferably, a magnet is provided at the groove.

[0013] Preferably, the connecting piece is provided with an external thread.

[0014] According to the threading universal joint of the embodiment of the utility model, a bearing is built into each side of the connecting piece to replace the original single bearing design, which can significantly improve the stability and durability of the universal joint. This improvement can more effectively disperse the load, reduce wear, thereby reducing the possibility of deformation and wear, and enhance the rigidity of the overall structure, thereby reducing the gap between the connecting piece and the rotating shaft during high-intensity training, and ensuring the smoothness and accuracy of movement.

[0015] It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the prior art threading universal joint;

[0017] Figure 2 This is a schematic diagram of the interior of a threading universal joint according to an embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of a threading universal joint according to an embodiment of the utility model. DETAILED DESCRIPTION

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

[0020] First, combine Figure 2 , 3 Description The threading universal joint according to the embodiment of the utility model is a key component in a mechanical system, which transmits torque and realizes the transmission of power or motion. It is widely used in the automotive industry, medical equipment, life tools, etc. In this embodiment, the universal joint structure in fitness equipment is taken as an example for explanation.

[0021] like Figure 2 , 3As shown, the threading universal joint of the embodiment of the utility model comprises a main body 2, a supporting body, a connecting member 3, and a threading hole 1.

[0022] Specifically, Figure 2 , 3 As shown, the main body 2 includes a rotating shaft, and the rotating shaft 21 is the core part of the universal joint, which allows free rotation. A roller 22 is provided on the rotating shaft 21, and the rope is pulled along the roller 22; a support body is provided at one end of the main body 2, and a connecting member 3 is provided on the support body. The support body provides stable support for the universal joint, and the connecting member 3 is connected to the external movement use end through a bearing 4. The use of the bearing 4 can further reduce friction and improve the durability and stability of the universal joint. The connecting member 3 of this scheme includes at least two bearings 4, which can more effectively disperse the load, reduce wear, and enhance the rigidity of the overall structure, thereby improving the stability and durability of the universal joint, and the connecting member 3 is connected to the external movement use end; a threading hole 1 is provided inside the rotating shaft 21 and passes through the rotating shaft 21, and the telescopic self-threading hole 1 passes through the inside, and the threading hole 1 extends from the external movement use end toward the direction of the roller 22, and extends outward from a section of the roller 22 along the direction of the threading hole 1.

[0023] Preferably, if Figure 3 As shown, the connecting member 3 includes a pair of bearings 4, which can reduce the assembly cost while ensuring the stability and durability of the universal joint.

[0024] Preferably, if Figure 3 As shown, a pair of bearings 4 are respectively arranged at both ends of the connecting member 3 to form a symmetrical support force effect, which can effectively disperse the load, reduce the wear of a single bearing 4, and increase the service life.

[0025] Preferably, a pair of bearings 4 are respectively provided with ribs, each of which is arranged on the outside of the connecting member 3. The provision of the ribs can prevent the bearings 4 from falling off during use, while increasing the stability of the structure and improving the safety of the universal joint.

[0026] Preferably, if Figure 2 As shown, the support body also includes a retaining spring 5, which is arranged at one end of the bearing 4 away from the roller 22. The retaining spring 5 is clamped on the rotating shaft 21. The introduction of the retaining spring 5 can further fix the bearing 4 to prevent it from being displaced due to vibration and other reasons, thereby ensuring the stability of the universal joint during long-term use.

[0027] Preferably, the radius of the threading hole 1 is 0.5 to 0.8 times the radius of the rotating shaft 21, which is larger than the radial direction of the threading hole 1 in the prior art. Reasonable setting of the ratio of the radius of the threading hole 1 to the radius of the rotating shaft 21 ensures that the cable can pass through smoothly and effectively reduces the wear on the edge of the threading hole 1, while reducing the problem of decreased structural strength caused by the excessive size of the threading hole 1, thereby achieving a balance between strength and function.

[0028] Preferably, the radius of the threading hole 1 is 2 / 3 times the radius of the rotating shaft 21, which effectively reduces the wear on the edge of the threading hole 1, so that the universal joint can maintain a high structural strength while meeting the requirements of cable passing, thereby improving the overall durability.

[0029] Preferably, if Figure 2 , 3 As shown, a groove 6 is provided on the outer side of the main body 2, and the groove 6 is coupled with the external threading ball part, which can effectively store the product during the entire transportation and storage process and save space.

[0030] Preferably, a magnet is provided at the groove 6, and the provision of the magnet can further increase the fixing effect of the threading ball, prevent it from falling off, and provide a better storage effect.

[0031] Preferably, the connecting member 3 is provided with an external thread to effectively fix it to the external moving use end.

[0032] When in use, the universal joint allows free rotation in multiple directions through its internal rotating shaft 21 and roller 22 structure, thereby flexibly transmitting the movement of the external motion end. The cable passes smoothly through the enlarged threading hole 1, reducing friction with the hole wall. The storage slot can also effectively prevent the loss of the accessory ball.

[0033] Above, refer to Figures 1 to 3 The threading universal joint according to the embodiment of the utility model is described, and the stability and durability of the universal joint can be significantly improved by replacing the original single bearing 4 design with a bearing 4 built in each side of the connecting member 3. This improvement can more effectively disperse the load, reduce wear, thereby reducing the possibility of deformation and wear, and enhance the rigidity of the overall structure, thereby reducing the appearance of the gap between the connecting member 3 and the rotating shaft 21 during high-intensity training, and ensuring the smoothness and accuracy of the movement.

[0034] In the description of the present invention, it should be noted that, unless otherwise specified, “plurality” means two or more than two; the orientations or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “inside”, “outside”, “top”, and “bottom” are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] It should be noted that, in this specification, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprises..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0036] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. A threading universal joint, characterized in that: Include: A body, the body comprising a rotating shaft, and a roller is provided on the rotating shaft; A support body, the support body is arranged at one end of the main body, the support body is provided with a connecting piece, and the connecting piece includes at least two bearings; A connecting piece connected to the external motion use end; A threading hole is arranged inside the rotating shaft and passes through the rotating shaft, and the threading hole extends from the external movement use end toward the roller direction.

2. The threading universal joint according to claim 1, characterized in that: The connecting member includes a pair of bearings.

3. The threading universal joint according to claim 2, characterized in that: The pair of bearings are respectively arranged at two ends of the connecting member.

4. The threading universal joint according to claim 3, characterized in that: The pair of bearings are respectively provided with ribs, and each rib is arranged on the outside of the connecting member.

5. The threading universal joint according to claim 3 or 4, characterized in that: The support body further comprises a retaining spring, which is arranged at one end of the bearing away from the roller, and the retaining spring is retained on the rotating shaft.

6. The threading universal joint according to claim 1, characterized in that: The radius of the threading hole is 0.5 to 0.8 times the radius of the rotating shaft.

7. The threading universal joint according to claim 6, characterized in that: The radius of the threading hole is 2 / 3 times the radius of the rotating shaft.

8. The threading universal joint according to claim 1, characterized in that: A groove is arranged on the outer side of the body, and the groove is coupled with the outer threading ball part.

9. The threading universal joint according to claim 8, characterized in that: A magnet is arranged at the groove.

10. The threading universal joint according to claim 1, characterized in that: The connecting piece is provided with external threads.

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