Movable joint with low axial force

Abstract

The utility model relates to the technical field of low-axial-force movable joints, and discloses a low-axial-force movable joint which comprises an outer joint sleeve, an inner joint sleeve, a movable joint sleeve and an inner joint sleeve. The outer wall of the inner joint core is provided with a convex part which is matched with the guide groove; the rolling body group is arranged between the guide groove and the lug boss and is used for converting sliding friction into rolling friction; the rolling body set is composed of three rolling wheels, the three rolling wheels are evenly distributed in the circumferential direction, and the central included angle between every two adjacent rolling wheels is 120 degrees. According to the low-axial-force moving joint, the rolling body set composed of the three rolling wheels is arranged between the outer joint sleeve and the inner joint core and matched with the arc-shaped guide groove and the protruding part arc-shaped groove which are in a specific proportion, traditional sliding friction is effectively converted into rolling friction, axial movement resistance is remarkably reduced, meanwhile, a quenched and tempered 40Cr steel material is adopted, and the service life of the low-axial-force moving joint is prolonged. On the premise that the structural strength is guaranteed, high precision, low abrasion and long service life of the movable joint are achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of low axial force sliding joints, specifically a low axial force sliding joint. Background Technology

[0002] Low axial force sliding joint technology is a technology designed to effectively reduce frictional resistance and axial force between internal components of the sliding joint by optimizing structural design and material selection.

[0003] However, in traditional designs, the contact between sliding parts often leads to high frictional resistance, which not only increases energy consumption but also accelerates the wear of the parts. In some applications, precise control of axial force is required to ensure the stability and efficiency of the device. Traditional moving joints cannot effectively reduce or control axial force, thus affecting overall performance. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A low axial force sliding joint includes:

[0007] The outer sleeve has a guide groove on its inner wall;

[0008] The inner core has an outer wall with a protrusion that cooperates with the guide groove;

[0009] The rolling element assembly, located between the guide groove and the protrusion, is used to convert sliding friction into rolling friction.

[0010] As a further embodiment of this utility model: the rolling element assembly consists of three rollers, which are evenly distributed along the circumference and the included angle between the centers of adjacent rollers is 120°.

[0011] As a further improvement of this utility model, the cross-section of the guide groove is arc-shaped, and the ratio of the radius of the arc to the radius of the roller is between 1.5:1 and 2:1.

[0012] As a further improvement of this utility model: the top of the protrusion is provided with an arc-shaped groove that cooperates with the roller, and the radius of curvature of the arc-shaped groove is the same as the radius of the roller.

[0013] As a further improvement of this utility model, the outer sleeve and inner core are made of 40Cr steel, which is formed by quenching and tempering heat treatment.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention effectively transforms traditional sliding friction into rolling friction by setting a rolling element group consisting of three rollers between the outer sleeve and the inner core, combined with a specific ratio of arc-shaped guide groove and arc-shaped groove of the protrusion, which significantly reduces axial movement resistance. At the same time, by using quenched and tempered 40Cr steel material, high precision, low wear and long service life of the moving section are achieved while ensuring structural strength. Attached Figure Description

[0016] Figure 1 A schematic diagram of a sliding joint with low axial force;

[0017] Figure 2 This is a schematic diagram of a guide groove structure in a low axial force moving joint;

[0018] Figure 3 A schematic diagram of the rolling element assembly structure in a low axial force sliding joint;

[0019] Figure 4 This is a schematic diagram of a protrusion structure in a low axial force moving joint.

[0020] In the diagram: 100, outer sleeve; 101, guide groove; 200, inner core; 201, protrusion; 202, rolling element assembly. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0024] Example

[0025] Please see Figure 1-4 This is an embodiment of the present invention, which provides a low-axial-force sliding joint, comprising:

[0026] The outer sleeve 100 has a guide groove 101 on its inner wall;

[0027] The inner core 200 has a protrusion 201 on its outer wall that cooperates with the guide groove 101;

[0028] The rolling element assembly 202, which is disposed between the guide groove 101 and the protrusion 201, is used to convert sliding friction into rolling friction.

[0029] Specifically, the rolling element assembly 202 consists of three rollers, which are evenly distributed along the circumference and the included angle between the centers of adjacent rollers is 120°.

[0030] Furthermore, the three-point uniform distribution structure ensures even load distribution, avoids local stress concentration, and guarantees the stability and balance of the moving section during movement, effectively preventing the occurrence of off-center loading.

[0031] Specifically, the cross-section of the guide groove 101 is arc-shaped, and the ratio of the arc radius to the roller radius is between 1.5:1 and 2:1.

[0032] Furthermore, this specific proportional design ensures good contact between the roller and the guide groove while leaving appropriate clearance space, which reduces frictional resistance and can accommodate lubricating grease, significantly improving the smoothness of movement and service life of the moving section.

[0033] Specifically, the top of the protrusion 201 is provided with an arc-shaped groove that cooperates with the roller, and the radius of curvature of the arc-shaped groove is the same as the radius of the roller.

[0034] Furthermore, the precisely matched arc-shaped contact surface design makes the load transfer more uniform, reduces contact stress, avoids edge effects, reduces operating noise, and improves the smoothness of the moving section's operation.

[0035] Specifically, the outer sleeve 100 and the inner core 200 are made of 40Cr steel, which is formed by quenching and tempering heat treatment.

[0036] Furthermore, the material selection and heat treatment process give the component excellent comprehensive mechanical properties, ensuring sufficient strength and hardness to withstand loads while maintaining good toughness, effectively preventing deformation and wear during use.

[0037] In use, the low axial force moving joint is installed in the mechanical structure that requires relative axial movement. The outer sleeve 100 is fixed to the equipment base, and the inner core 200 is connected to the moving parts. When the equipment is running, the inner core 200 moves axially, and its protrusion 201 rolls in the guide groove 101 through three evenly distributed rollers 202, achieving low-resistance and smooth movement. During use, grease needs to be added to the guide groove 101 regularly to keep the rollers 202 rolling smoothly and extend their service life.

[0038] In summary, by setting a rolling element group 202 consisting of three rollers between the outer sleeve and the inner core, and cooperating with a circular arc guide groove 101 and a raised arc groove in a specific ratio, the traditional sliding friction is effectively converted into rolling friction, which significantly reduces the axial movement resistance. At the same time, by using 40Cr steel material that has been quenched and tempered, the high precision, low wear and long service life of the moving joint are achieved while ensuring the structural strength.

[0039] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0040] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0041] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A sliding joint with low axial force, characterized in that: include: The outer sleeve (100) has a guide groove (101) on its inner wall. The inner core (200) has a protrusion (201) on its outer wall that cooperates with the guide groove (101); The rolling element assembly (202) disposed between the guide groove (101) and the protrusion (201) is used to convert sliding friction into rolling friction.

2. The sliding joint with low axial force according to claim 1, characterized in that: The rolling element assembly (202) consists of three rollers, which are evenly distributed along the circumference and the included angle between the centers of adjacent rollers is 120°.

3. A sliding joint with low axial force according to claim 2, characterized in that: The cross-section of the guide groove (101) is arc-shaped, and the ratio of the radius of the arc to the radius of the roller is between 1.5:1 and 2:

1.

4. A sliding joint with low axial force according to claim 2, characterized in that: The top of the protrusion (201) is provided with an arc-shaped groove that cooperates with the roller, and the radius of curvature of the arc-shaped groove is the same as the radius of the roller.

5. A sliding joint with low axial force according to claim 1, characterized in that: The outer sleeve (100) and inner core (200) are made of 40Cr steel and are formed by quenching and tempering heat treatment.

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