Threading universal joint

Abstract

The utility model discloses a threading universal joint which comprises a body, a supporting body, a shell and a guide sliding groove. 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 is connected with an external movement use end; the shell covers the body, and an opening is formed in the end, away from the supporting body, of the shell. At least one guide sliding groove is formed in the edge of the opening and extends in the extending direction of the opening. The outer edge of the universal joint is optimally designed according to the dynamic characteristics of a rope, so that the rope cannot be pulled and blocked with the outer edge and enters the roller in the body through the guide sliding groove, and the smoothness in the using process is improved.

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 used in fitness equipment is a special connection component, which is mainly used to transmit motion force in fitness equipment. It is widely used, for example, in treadmills, spinning bikes, rowing machines and other equipment. When these equipment are running, wires or ropes are needed to transmit motion force while maintaining a certain degree of flexibility and direction change. The design of the threading universal joint allows free rotation in multiple directions, thereby ensuring that the wires or ropes can smoothly transmit force in complex motion trajectories.

[0003] The most important thing about the universal joint during use is that it meets the performance requirements of fitness equipment in specific application scenarios, such as bearing frequent reciprocating, high-intensity motion loads, and adapting to complex and changeable motion trajectories. Traditional universal joints will jam during use, affecting the user experience and exercise effects, especially during the rope pulling process, where the outer edge of the universal joint gets stuck, which is a common phenomenon. On the other hand, traditional universal joints usually have a bearing on one side of the end for use in motion, which is then connected to the rotating shaft. Although this reduces friction and wear, there is usually a gap between the bearing and the bearing seat in specific fitness scenarios. After long-term use, the stability of the entire fitness equipment system is challenged. Therefore, the new generation of fitness equipment has higher requirements for the smoothness and safety of the use of universal joints. 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 shell, and a guide slot; 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 piece is provided, and the connecting piece is connected to an external moving use end; the shell cover is arranged on the main body, and at the end away from the support body, the shell is provided with an opening; at least one guide slot is provided at the edge of the opening, and the guide slot extends along the extension direction of the opening.

[0005] Preferably, the opening is symmetrical along the central axis of the body, and a guide slot is provided on each side of the symmetrical opening.

[0006] Preferably, the opening is in a strip shape, the guide slot is in a strip shape, and the width in the middle of the guide slot is greater than the width at both ends.

[0007] Preferably, a side of the guide slot close to the opening is recessed toward the roller.

[0008] Preferably, the inner side of the guide slot is a curved surface, and the curvature of the curved surface gradually increases from the side away from the opening to the side close to the opening.

[0009] Preferably, a rolling groove is provided on the roller.

[0010] Preferably, the support body is a bearing.

[0011] Preferably, the support body and the connecting piece are integrally formed.

[0012] Preferably, the supporting body is a sleeve, and the rotation center of the sleeve is coaxial with the rotation axis.

[0013] Preferably, an oil seal is provided at the connection between the support body and the rotating shaft.

[0014] According to the threading universal joint of the embodiment of the utility model, the outer edge of the universal joint can be optimized according to the dynamic characteristics of the rope, so that the rope will not be pulled and stuck by the outer edge, and enter the roller inside the main body through the guide groove, thereby improving the smoothness of the use process; on the other hand, the integrated design of the support body makes the structure simpler and more compact, improves the reliability and stability of the mechanical system, and is more convenient to assemble, which not only improves the assembly efficiency of the mechanical equipment, but also reduces the production cost; at the same time, the integrated structure enhances the strength of the shaft, improves the load capacity and vibration resistance of the mechanical equipment, and is more suitable for the scenario of repeatedly weighing heavy load fitness equipment. Although the increase in friction slightly increases the wear, in the actual use test, the effect of this wear on the life is very limited.

[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 This is a schematic diagram of the structure of a threading universal joint according to an embodiment of the utility model;

[0017] Figure 2 The figure is a schematic diagram of the interior of a threading universal joint according to an embodiment of the utility model. DETAILED DESCRIPTION

[0018] 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.

[0019] First, combine Figure 1 , 2 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.

[0020] like Figure 1 , 2As shown, the threading universal joint of the embodiment of the utility model comprises a main body 1 , a support body 2 , a shell 3 , and a guide slot 4 .

[0021] Specifically, Figure 1 , 2 As shown, the body 1 includes a rotating shaft, and a roller 12 is arranged on the rotating shaft 11. The roller 12 rotates on the rotating shaft 11, providing stable support and guidance for the rope; at the same time, the stability of the rope when transmitting force is ensured; the support body 2 is arranged at one end of the body 1, and a connecting piece 6 is arranged on the support body 2, which improves the strength and stability of the universal joint, and the connecting piece 6 is connected to the external movement use end; the shell 3 is covered on the body 1, and at the end away from the support body 2, the shell 3 is provided with an opening 31, and the shell 3 protects the internal structure of the universal joint and prevents the intrusion of dust and impurities. The design of the opening 31 allows the rope to easily enter the interior of the universal joint and contact with the roller 12; at least one guide slot 4 is arranged on the edge of the opening 31, and the guide slot 4 extends along the extension direction of the opening 31. The design of the guide slot 4 is optimized for the dynamic characteristics of the rope, so that the rope can smoothly pass through the slot into the interior of the universal joint and contact with the roller 12, which avoids the problem that the rope is stuck on the outer edge of the universal joint during the pulling process, and improves the fluency of the use process.

[0022] Preferably, if Figure 1 As shown, the opening 31 is symmetrical along the central axis of the body 1, and a guide groove 4 is provided on each side of the symmetrical opening 31. The symmetrical design of the opening 31 allows the rope to enter the universal joint from both sides when it is pulled in different directions, thereby improving the flexibility and applicability of use.

[0023] Preferably, if Figure 1 As shown, the opening 31 is in a strip shape, the guide slot 4 is in a strip shape, the width in the middle of the guide slot 4 is greater than the width at both ends, allowing the rope to enter the universal joint more easily. The design that the width in the middle of the guide slot 4 is greater than the width at both ends can provide a better guiding effect, ensuring that the rope is guided by the slot as much as possible, reducing jamming caused by deviation or shaking.

[0024] Preferably, the side of the guide groove 4 close to the opening 31 is recessed toward the roller 12. The recessed design of the guide groove 4 can better fit the shape of the rope, provide a smoother transition for the rope, reduce the friction and resistance of the rope before entering the roller 12, and further improve the fluency of use.

[0025] Preferably, the inner side of the guide groove 4 is a curved surface, and the curvature of the curved surface gradually increases from the side away from the opening 31 to the side close to the opening 31. The curved guide groove 4 can better guide the rope into the roller 12. The design of gradually increasing curvature gradually reduces the resistance encountered by the rope during sliding, further improving the fluency and comfort of use.

[0026] Preferably, if Figure 2 As shown, a rolling groove 5 is provided on the roller 12. The rolling groove 5 on the roller 12 is designed to provide more stable rope support, prevent the rope from deflecting or shaking when sliding on the roller 12, ensure the smooth transmission of force, and improve the stability and safety of use.

[0027] Preferably, the support body 2 is a bearing. Using a bearing as the support body 2 can further reduce the friction and resistance of the universal joint during rotation, thereby improving the rotation flexibility and service life of the universal joint.

[0028] Preferably, if Figure 2 As shown, the support body 2 and the connecting member 6 are integrally formed, and the integrally formed design of the support body 2 and the connecting member 6 improves the structural strength of the entire universal joint and reduces looseness or deformation caused by long-term use or heavy load. At the same time, the integral forming also simplifies the assembly process and improves production efficiency.

[0029] Preferably, the support body 2 is a sleeve, and the rotation center of the sleeve is coaxial with the rotating shaft 11. The sleeve-type support body 2 can ensure that the universal joint remains coaxial during rotation, avoiding vibration and noise caused by eccentricity. At the same time, the sleeve structure also makes the support body 2 more durable and suitable for heavy loads and long-term use.

[0030] Preferably, an oil seal is provided at the joint between the support body 2 and the rotating shaft 11 to effectively prevent the leakage of lubricating oil and the entry of dust and impurities, thereby ensuring the lubrication performance and service life of the universal joint. At the same time, the oil seal can also reduce the friction and wear caused by poor lubrication, thereby increasing the service life of the universal joint.

[0031] When in use, when the rope is pulled to either side at the opening 31, the rope can be guided by the guide slot 4 to smoothly enter the universal joint, contact the roller 12 and slide on the roller 12, so as to achieve force transmission and direction change. The integrated structure of the support body 2 enhances the strength of the shaft, improves stability and vibration resistance, and ensures reliability in heavy load scenarios such as repeated weighing of fitness equipment.

[0032] Above, refer to Figure 1 , 2The threading universal joint according to the embodiment of the utility model is described, which can optimize the design of the outer edge of the universal joint according to the dynamic characteristics of the rope, so that the rope will not be pulled and stuck by the outer edge, and enter the internal roller 12 of the main body 1 through the guide groove 4, thereby improving the smoothness of the use process; on the other hand, the integrated design of the support body 2 makes the structure simpler and more compact, improves the reliability and stability of the mechanical system, and is more convenient to assemble, which not only improves the assembly efficiency of the mechanical equipment, but also reduces the production cost; at the same time, the integrated structure enhances the strength of the shaft, improves the load capacity and vibration resistance of the mechanical equipment, and is more suitable for the scenario of repeatedly weighing heavy load fitness equipment. Although the increase in friction slightly increases the wear, in the actual use test, the effect of this wear on the life is very limited.

[0033] 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.

[0034] 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.

[0035] 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 is connected to the external movement use end; A shell, the shell cover is arranged on the body, and the shell is provided with an opening at one end away from the support body; A guide slot, wherein at least one guide slot is disposed on the edge of the opening, and the guide slot extends along the extension direction of the opening.

2. The threading universal joint according to claim 1, characterized in that: The opening is symmetrical along the central axis of the body, and a guide slot is provided on each side of the symmetrical opening.

3. The threading universal joint according to claim 2, characterized in that: The opening is in a strip shape, the guide slot is in a strip shape, and the width in the middle of the guide slot is greater than the width at both ends.

4. The threading universal joint according to claim 3, characterized in that: A side of the guide slot close to the opening is recessed toward the roller.

5. The threading universal joint according to claim 4, characterized in that: The inner side of the guide slot is a curved surface, and the curvature of the curved surface gradually increases from the side away from the opening to the side close to the opening.

6. The threading universal joint according to claim 1, characterized in that: The roller is provided with a rolling groove.

7. The threading universal joint according to claim 1, characterized in that: The supporting body is a bearing.

8. The threading universal joint according to claim 1, characterized in that: The supporting body and the connecting member are integrally formed.

9. The threading universal joint according to claim 8, characterized in that: The supporting body is a sleeve, and the rotation center of the sleeve is coaxial with the rotating shaft.

10. The threading universal joint according to claim 8, characterized in that: An oil seal is provided at the connection between the support body and the rotating shaft.

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