Pressure-bearing structure for ball cage coupling and ball cage coupling

Abstract

The utility model provides a pressure-bearing structure for a ball cage coupling and the ball cage coupling, and relates to the field of coupling structures. The pressure-bearing structure comprises a coupling outer sleeve, a spherical seat, an ejector rod body, an ejector rod spring, a steel ball, a retainer and a coupling shaft head; the spherical seat is positioned and mounted in the coupler outer sleeve through a bearing, the coupler shaft head is mounted in the coupler outer sleeve through a steel ball and a retainer, the ejector rod body is mounted at the end, close to the spherical seat, of the coupler shaft head, and one end of the ejector rod body extends out of the coupler shaft head and is in contact with the spherical seat; the ejector rod spring is installed between the ejector rod body and the coupler shaft head. The spherical seat with the bearing is matched with the ejector rod body, so that additional axial force and additional bending moment generated in the working process of the coupler can be effectively reduced, the working stability of the coupler is improved, and the service life of the coupler is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of coupling structures, in particular to a pressure-bearing structure for a ball cage coupling and the ball cage coupling. Background Art

[0002] The ball cage universal coupling is connected to the driving and driven shafts through the ball cage outer ring, star-shaped inner ring and retaining frame respectively. The centers of the force-transmitting steel balls are located in the plane passing through the center of the coupling and are installed in the raceway composed of the spherical outer ring and the outer spherical grooves of the star-shaped inner ring. The centers of the two spheres coincide with the center of the universal coupling. In order to ensure that the centers of all steel balls are on the bisector of the angle between the axes of the two shafts, the steel balls are installed in the window of the retaining frame, thereby ensuring that when the angle between the driving and driven shafts of the coupling changes, the force transmission point can always be located on the bisector of the angle. Therefore, the rotational speed between the driving and driven shafts of the ball cage universal coupling can be kept synchronized.

[0003] like Figure 1 As shown, the ball cage body of the coupling in the prior art is directly pressed on the spherical seat through the push rod, which has the following problems:

[0004] 1. The additional force generated during the operation of the coupling directly acts on the coupling body, affecting the smoothness of the movement and reducing the dynamic balance accuracy.

[0005] 2. It is impossible to reduce abnormal vibration during operation. When working at a certain angle, it is impossible to eliminate the additional component of the axial force, which seriously affects the service life of the coupling. Utility Model Content

[0006] In view of the defects in the prior art, the purpose of the utility model is to provide a pressure-bearing structure for a ball cage coupling and a ball cage coupling.

[0007] According to the utility model, a pressure-bearing structure for a ball cage coupling is provided, comprising a coupling outer sleeve, a spherical seat, a push rod body, a push rod spring, a steel ball and a retaining frame, and a coupling shaft head; the spherical seat is positioned and installed in the coupling outer sleeve through a bearing, the coupling shaft head is installed in the coupling outer sleeve through a steel ball and a retaining frame, the push rod body is installed at the end of the coupling shaft head close to the spherical seat, one end of the push rod body extends out of the coupling shaft head and contacts the spherical seat; the push rod spring is installed between the push rod body and the coupling shaft head.

[0008] Preferably, a bearing seat and a bearing end cover are provided in the coupling outer sleeve, and the bearing seat and the bearing end cover cooperate with fasteners to position and install the bearing.

[0009] Preferably, the bearing seat is welded to the coupling sleeve, the bearing end cover is fastened to the bearing seat by screws, and the bearing is clamped between the bearing seat and the bearing end cover.

[0010] Preferably, the bearing comprises a thrust ball bearing.

[0011] Preferably, a cavity for accommodating a push rod body is provided at the end of the coupling shaft head close to the spherical seat, and the push rod body is clamped in the cavity of the coupling shaft head.

[0012] Preferably, the ejector body comprises a chamber for accommodating an ejector spring, one end of the ejector spring contacts the inner wall of the ejector body chamber, and the other end of the ejector spring contacts the coupling shaft head.

[0013] Preferably, the surface of the push rod body in contact with the spherical seat is an arc-shaped surface.

[0014] Preferably, the coupling outer sleeve, the spherical seat, the push rod body and the coupling shaft head are all coaxial.

[0015] Preferably, the material of the pressure-bearing structure of the ball cage coupling includes a wear-resistant metal material.

[0016] According to the utility model, a ball cage coupling is provided, which adopts a pressure-bearing structure for the ball cage coupling.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The utility model can effectively reduce and lower the additional axial force and additional bending moment generated during the operation of the coupling by cooperating the spherical seat with the bearing with the ejector rod body, thereby improving the working stability of the coupling and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0020] Figure 1 This is a schematic diagram of the existing pressure-bearing structure in the background technology mainly embodied in the utility model;

[0021] Figure 2 This is a schematic diagram of the pressure-bearing structure of the present application in a specific implementation mode of the present utility model;

[0022] Figure 3 This is a schematic diagram of the utility model mainly showing the conversion of additional force and additional bending moment into the centripetal force and torque of the circular motion of the bearing;

[0023] Figure 4 This is a force decomposition diagram of the coupling when it works at a certain working angle;

[0024] Figure 5 This is a force diagram mainly embodied in the utility model when the pressure-bearing structure of this application is working.

[0025] Reference numerals:

[0026] Coupling sleeve 1 Coupling shaft head 6

[0027] Bearing seat 2 Thrust ball bearing 7

[0028] Bearing end cover 3 Push rod body 8

[0029] Spherical seat 4 Ejector spring 9

[0030] Steel ball and cage 5 DETAILED DESCRIPTION

[0031] The utility model is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for those of ordinary skill in the art, several changes and improvements can be made without departing from the concept of the utility model. These all belong to the protection scope of the utility model.

[0032] like Figure 2 As shown, a pressure-bearing structure for a ball cage coupling provided by the utility model comprises a coupling outer sleeve 1, a spherical seat 4, a push rod body 8, a push rod spring 9, a steel ball and a retainer 5, and a coupling shaft head 6. The spherical seat 4 is installed in the coupling outer sleeve 1 through a bearing, the coupling shaft head 6 is installed in the coupling outer sleeve 1 through a steel ball and a retainer 5, the push rod body 8 is installed at the end of the coupling shaft head 6 close to the spherical seat 4, one end of the push rod body 8 extends out of the coupling shaft head 6 and contacts the spherical seat 4, and the push rod spring 9 is installed between the push rod body and the coupling shaft head 6.

[0033] In actual use, the coupling will bear axial force in addition to radial force and torque during movement. The axial force is generated by the braking force and inertia force of the transmission device. If the axial force exceeds the bearing capacity of the coupling, it will affect the normal operation of the coupling. The present application uses the spherical seat 4 with bearings to cooperate with the push rod body 8 to effectively reduce and lower the additional axial force and additional bending moment generated during the operation of the coupling, thereby improving the stability of the coupling and extending its service life.

[0034] Specifically, a bearing seat 2 and a bearing end cover 3 are arranged in the coupling outer sleeve 1, and the bearing seat 2 and the bearing end cover 3 cooperate with fasteners to position and install the bearing. The present application provides an implementation method in which the bearing seat 2 and the bearing end cover 3 cooperate with fasteners to position and install the bearing: the bearing seat 2 is welded to the coupling outer sleeve 1, the bearing end cover 3 is fastened to the bearing seat 2 by screws, and the bearing is clamped between the bearing seat 2 and the bearing end cover 3. Preferably, the bearing includes a thrust ball bearing 7.

[0035] More specifically, a chamber for accommodating a push rod body 8 is provided at the end of the coupling shaft head 6 close to the spherical seat 4, and the push rod body 8 is stuck in the chamber of the coupling shaft head 6. The push rod body 8 includes a chamber for accommodating a push rod spring 9, one end of the push rod spring 9 contacts the inner wall of the chamber of the push rod body 8, and the other end of the push rod spring 9 contacts the coupling shaft head 6. Thus, the integral installation of the pressure-bearing structure is realized.

[0036] Furthermore, the surface of the push rod body 8 in contact with the spherical seat 4 is an arc surface. The coupling jacket 1, the spherical seat 4, the push rod body 8 and the coupling shaft head 6 are all coaxial. The material of the pressure-bearing structure of the ball cage coupling includes a wear-resistant metal material.

[0037] like Figure 3 As shown, the pressure-bearing structure of the present application is embedded in the bearing structure by the spherical seat 4. When additional axial force or additional bending moment is generated, the spherical seat 4 pushes the thrust ball bearing 7 to move. In this way, the additional force and additional bending moment are converted into the centripetal force and torque of the bearing circular motion, thereby reducing the axial force. When the coupling is working and has a certain working angle, its axial force is as follows Figure 4 As shown, the axial force F will produce a horizontal component force F1 and a vertical component force F2. The axial force is related to the distance between the two axial ends of the coupling. When the distance between the two axial ends is close, the axial force generated by the coupling is very small and can be ignored. However, when the distance between the two axial ends is far, the axial force will be larger. Generally speaking, the couplings used in rolling mills are larger, and their axial forces will also be large, which will have a significant impact on the service life of the coupling. When the working angle is 2°, its vertical component force F2 is approximately 3.5% of the axial force F. The vertical component force is one of the important reasons that affect the movement stability of the coupling. After using this pressure-bearing structure, such as Figure 5 As shown, the component force F2 will be greatly reduced, reducing the abnormal vibration generated during operation, thereby improving the stability during operation.

[0038] According to the utility model, a ball cage coupling is provided, which adopts a pressure-bearing structure for the ball cage coupling.

[0039] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other at will.

Claims

1. A pressure-bearing structure for a ball cage coupling, characterized in that: It includes a coupling outer sleeve, a spherical seat, a push rod body, a push rod spring, a steel ball and a retaining frame, and a coupling shaft head; The spherical seat is positioned and installed in the coupling outer sleeve through a bearing, the coupling shaft head is installed in the coupling outer sleeve through a steel ball and a retaining frame, the push rod body is installed at the end of the coupling shaft head close to the spherical seat, and one end of the push rod body extends out of the coupling shaft head and contacts the spherical seat; The push rod spring is installed between the push rod body and the coupling shaft head.

2. The pressure-bearing structure for a ball cage coupling according to claim 1, characterized in that: A bearing seat and a bearing end cover are arranged in the coupling outer sleeve, and the bearing seat and the bearing end cover cooperate with fasteners to position and install the bearing.

3. The pressure-bearing structure for a ball cage coupling according to claim 2, characterized in that: The bearing seat is welded to the coupling outer sleeve, the bearing end cover is fastened to the bearing seat by screws, and the bearing is clamped between the bearing seat and the bearing end cover.

4. The pressure-bearing structure for a ball cage coupling according to claim 1, characterized in that: The bearing comprises a thrust ball bearing.

5. The pressure-bearing structure for a ball cage coupling according to claim 1, characterized in that: The end of the coupling shaft head close to the spherical seat is provided with a cavity for accommodating a push rod body, and the push rod body is clamped in the cavity of the coupling shaft head.

6. The pressure-bearing structure for a ball cage coupling according to claim 1, characterized in that: The ejector body comprises a chamber for accommodating an ejector spring, one end of the ejector spring contacts the inner wall of the ejector body chamber, and the other end of the ejector spring contacts the coupling shaft head.

7. The pressure-bearing structure for a ball cage coupling according to claim 1, characterized in that: The surface where the push rod body contacts the spherical seat is an arc surface.

8. The pressure-bearing structure for a ball cage coupling according to claim 1, characterized in that: The coupling outer sleeve, the spherical seat, the push rod body and the coupling shaft head are all coaxial.

9. The pressure-bearing structure for a ball cage coupling according to claim 1, characterized in that: The material of the pressure-bearing structure of the ball cage coupling includes wear-resistant metal material.

10. A ball cage coupling, characterized in that: A pressure-bearing structure for a ball cage coupling as described in any one of claims 1 to 9 is adopted.

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