Bearing nut and bearing

Abstract

The utility model provides a bearing nut and a bearing, and relates to the technical field of mechanical parts, the technical key points are that the bearing nut comprises a nut main body, an inner ring bearing ring and a spring ring, the nut main body is sleeved on the periphery of the inner ring bearing ring, and the spring ring is positioned between the nut main body and the inner ring bearing ring; the inner ring bearing ring is dynamically connected with the nut body through the elastic pre-tightening force of the spring ring and can freely rotate in the nut body. Through the arrangement of the spring ring, in the application process, the radial pre-tightening force generated by the spring ring in the compression state enables the inner ring bearing ring and the nut body to form stable dynamic connection, the free rotation function of the bearing ring under the conventional working condition is guaranteed, axial vibration and radial impact are absorbed through elastic deformation, and the service life of the bearing ring is prolonged. And the anti-loosening performance of the nut under a dynamic load is obviously improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical parts technical field especially, relates to a bearing nut and bearing. BACKGROUND

[0002] At present, the conventional bearing nut adopts the structure design of inlaid steel ball or ball bearing, and the connection of bearing ring and nut body is realized through the thread cooperation of precision machining. This kind of technical scheme usually relies on the following process to realize: annular raceway is processed in the inner wall of the nut to accommodate the steel ball, and the bearing parts are fixed by the external thread fastener or compression ring, so that the relative rotation function of the bearing ring is realized. This kind of structure is widely used in mechanical transmission system, aiming at reducing the rotation friction and transmitting the axial load.

[0003] However, the above-mentioned technology has the following defects in practical application: first, high-precision raceway processing and thread cooperation need to rely on special machine tools and complex process, resulting in rising production cost; second, the steel ball, bearing ring and threaded part need to be positioned and locked for many times through tools during assembly, the operation process is complicated and time-consuming, and the labor cost is high; third, in long-term use, the thread cooperation surface is easy to loosen due to vibration or wear, which causes the separation of the bearing ring and the nut body, and causes the risk of equipment disintegration; fourth, the steel ball structure of rigid connection cannot effectively buffer the impact load, and the stress is concentrated in the local contact area, accelerating the fatigue damage of the parts. In addition, the nut needs to be disassembled and replaced as a whole during maintenance, and the bearing ring cannot be independently repaired or quickly replaced, which further restricts its economy and reliability. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the problems in the prior art.

[0005] In order to realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A bearing nut, comprising a nut body, an inner ring bearing ring and a spring ring, the nut body is sleeved on the outer periphery of the inner ring bearing ring, and the spring ring is located between the nut body and the inner ring bearing ring; the inner ring bearing ring is dynamically connected with the nut body through the elastic pre-tightening force of the spring ring, and can rotate freely in the nut body.

[0007] Preferably, the nut body comprises a threaded part and a fixed part in sequence along the axial direction, both are integrally formed and the inner diameter decreases in sequence; the inner side of the fixed part is provided with an annular groove for installing the spring ring; the inner side of the threaded part is provided with an internal thread, and the fixed part is used for limiting the inner ring bearing ring.

[0008] Preferably, the inner ring bearing ring comprises a main body part and an embedded part, which are integrally formed; the outer periphery of the main body part is provided with a fixed groove corresponding to the annular groove to form a mounting space for the spring ring, and the cross section of the mounting space formed by the fixed groove and the annular groove in the vertical direction is rectangular; the outer periphery of the embedded part is chamfered.

[0009] Preferably, the inner side of the end of the fixed part away from the threaded part is provided with an abutting part, which is in the form of a circular ring, the inner side wall of which abuts against the outer side wall of the embedded part of the inner ring bearing ring, and the thicknesses of the two are consistent.

[0010] Preferably, the inner diameter of the threaded part is larger than the inner diameter of the fixed part, forming a stepped inner cavity structure for guiding the assembly and positioning of the inner ring bearing ring.

[0011] Preferably, the outer periphery profiles of the threaded part and the fixed part are consistent, and the outer periphery of both ends of the screw cap body is chamfered.

[0012] Preferably, the spring ring is in the form of a notched ring structure, is mounted between the annular groove and the fixed groove of the inner ring bearing ring, and is in a compressed state, providing radial pre-tightening force and axial buffering through elastic deformation.

[0013] Preferably, the inner ring bearing ring is detachably connected with the screw cap body through the elastic support of the spring ring, and the fixed groove and the annular groove are symmetrically distributed to constrain the radial displacement of the spring ring.

[0014] Preferably, the inner side of the inner ring bearing ring is sequentially provided with a straight hole, a tapered hole and an eccentric hole, the inner diameter of the tapered hole gradually decreases from the end close to the fixed part to the straight hole, and the minimum inner diameter of the tapered hole is equal to the inner diameter of the straight hole.

[0015] The application also provides a bearing comprising the bearing screw cap described above.

[0016] Advantages:

[0017] 1. Through the setting of the spring ring, the radial pre-tightening force generated by the spring ring in the compressed state during application enables the inner ring bearing ring and the screw cap body to form a stable dynamic connection, which not only ensures the free rotation function of the bearing ring under normal working conditions, but also absorbs axial vibration and radial impact through elastic deformation, significantly improving the anti-loosening performance of the screw cap under dynamic load.

[0018] 2. The tapered hole-straight hole composite structure of the inner ring bearing ring cooperates with the flexible support of the spring ring to adaptively compensate for the assembly eccentricity of the shaft or bolt, reduce local stress concentration of the contact surface, and prolong the service life of the components.

[0019] 3、ring groove and fixed groove symmetrical layout and spring ring gap design, not only simplifies the assembly process, but also through the modularization setting of elastic element, the maintenance and replacement of bearing ring do not need to disassemble the whole nut system, greatly improve the maintenance efficiency. The structure combines the characteristics of rigid connection and elastic buffering, has the significant advantages of high reliability, long service life and easy maintenance in the field of mechanical transmission. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an overall structure schematic view of a bearing nut in an embodiment of the utility model;

[0021] Figure 2 It is a split schematic view of a bearing nut in an embodiment of the utility model;

[0022] Figure 3 It is a sectional view of a bearing nut in an embodiment of the utility model.

[0023] LEGEND:

[0024] 1, nut body;12, threaded part;13, fixed part;131, bearing part;132, annular groove;2, inner ring bearing ring;21, main part;211, fixed groove;22, embedded part;23, straight hole;24, taper hole;25, eccentric hole;3, spring ring. DETAILED DESCRIPTION

[0025] The utility model will be further explained in detail in combination with specific embodiments.

[0026] Please refer to Figure 1 and Figure 2 A bearing nut, comprising a nut body 1, an inner ring bearing ring 2 and a spring ring 3, the nut body 1 is sleeved on the outer periphery of the inner ring bearing ring 2, the spring ring 3 is located between the nut body 1 and the inner ring bearing ring 2, and the inner ring bearing ring 2 can rotate freely in the nut body.

[0027] In an embodiment, please refer to Figure 1 The nut body 1 is arranged in a whole annular shape, the outer periphery of the two ends of the nut body 1 in the axial direction is chamfered, the nut body 1 is composed of two parts, which are threaded part 12 and fixed part 13 respectively, the two parts are integrally formed, and the outer rings of the two parts are consistent, the inner circle of the threaded part 12 is larger than that of the fixed part 13, specifically, the inner diameters of the threaded part 12 and the fixed part 13 are sequentially reduced. Wherein, the fixed part 13 is located at one end of the nut body 1, the threaded part 12 is the main part of the nut body 1, and the fixed part 13 is used for fixing the inner ring bearing ring 2.

[0028] In one implementation, please refer to Figure 2 and Figure 3 The inner sidewall of the threaded portion 12 is provided with an internal thread, and the fixing portion 11 is provided with a supporting portion 131 on the side opposite to the threaded portion 12. The supporting portion 131 is located inside the fixing portion 13 and is annular. The supporting portion 131 is used to support the inner ring bearing ring 2.

[0029] An annular groove 132 is provided on the inner side of the fixing part 13, and the annular groove 132 is used to install the spring coil 3.

[0030] Please see Figure 2 and Figure 3 The inner bearing ring 2 abuts against the inner side of the fixing part 13. The inner bearing ring 2 consists of two parts: a main body 21 and an insert part 22. The main body 21 and the insert part 22 are integrally formed. The outer side wall of the insert part 22 abuts against the inner side wall of the abutting part 131, and the thickness of the insert part 22 and the abutting part 131 are the same. The main body 21 is located inside the abutting part 131. A fixing groove 211 is provided on the outer periphery of the main body 21. The fixing groove 211 and the annular groove 132 are correspondingly arranged to form an installation space for fixing the spring ring 3. The installation space formed by the fixing groove 211 and the annular groove 132 has a rectangular cross-section in the vertical direction. By making the installation space rectangular, the installation space can be evenly stressed, preventing loosening. In one embodiment, the outer periphery of the main body 21 pointing towards the insert part 22 is chamfered.

[0031] Please see Figure 2 and Figure 3 In one embodiment, the bearing portion is provided with a straight hole 23, a tapered hole 24 and an eccentric hole 25 on its inner side. The straight hole 23 is located at one end of the inner ring bearing 2 pointing towards the fixed portion 13. The circular hole is located at one end of the inner ring bearing hole away from the fixed portion 13. The inner diameter of the tapered hole 24 gradually decreases from the circular hole towards the straight hole 23. The minimum inner diameter of the tapered hole 24 is equal to the inner diameter of the straight hole 23.

[0032] The spring coil 3 is located within the fixing groove 211 and the annular groove 132. In one embodiment, the cross-section of the spring coil 3 in the vertical direction is a right trapezoid; in other embodiments, the cross-section of the spring coil 3 in the vertical direction can also be triangular, circular, or quadrilateral. The spring coil 3 has a notch, and when it is located within the fixing groove 211 and the annular groove 132, it is in a compressed state. The spring coil 3 allows the inner bearing ring 2 to be snapped into the nut body, enabling the inner bearing ring to rotate freely within the nut body. Simultaneously, when the bearing ring is subjected to external force, the deformation of the spring coil 3 achieves a buffering and shock-absorbing effect.

[0033] This application also provides a bearing that includes the bearing nut described above.

[0034] The bearing nut provided in this application, through the setting of the spring ring 3, during application, the radial preload generated by the spring ring 3 under the compression state enables the inner bearing ring 2 to form a stable dynamic connection with the nut body 1. This not only ensures the free rotation function of the bearing ring under normal working conditions, but also absorbs axial vibration and radial impact through elastic deformation, significantly improving the nut's anti-loosening performance under dynamic load. Secondly, the composite structure of the tapered hole 24-straight hole 23 of the inner bearing ring 2, combined with the flexible support of the spring ring 3, can adaptively compensate for the assembly eccentricity of the shaft or bolt, reduce local stress concentration on the contact surface, and extend the service life of the component.

[0035] Furthermore, the symmetrical layout of the annular groove 132 and the fixed groove 211, along with the notch design of the spring ring 3, not only simplifies the assembly process but also, through the modular arrangement of the elastic elements, allows for the maintenance and replacement of the bearing ring without disassembling the entire nut system, significantly improving maintenance efficiency. This structure combines rigid connection with elastic buffering characteristics, offering significant advantages in mechanical transmission fields such as high reliability, long service life, and ease of maintenance.

Claims

1. A bearing nut, characterized in that, The device includes a nut body, an inner bearing ring, and a spring ring. The nut body is fitted around the outer circumference of the inner bearing ring, and the spring ring is located between the nut body and the inner bearing ring. The inner bearing ring is dynamically connected to the nut body through the elastic preload of the spring ring and can rotate freely within the nut body.

2. The bearing nut according to claim 1, characterized in that, The nut body includes a threaded part and a fixing part in sequence along the axial direction. The two parts are integrally formed and their inner diameters decrease sequentially. The fixing part has an annular groove on its inner side for installing a spring ring. The threaded part has an internal thread on its inner side. The fixing part is used to limit the inner ring bearing ring.

3. The bearing nut according to claim 2, characterized in that, The inner bearing ring includes a main body and an embedded part, which are integrally formed; the outer periphery of the main body is provided with a fixing groove, which corresponds to the annular groove to form an installation space for the spring ring; the installation space formed by the fixing groove and the annular groove has a rectangular cross-section in the vertical direction; the outer periphery of the embedded part is chamfered.

4. The bearing nut according to claim 3, characterized in that, The fixing part has a supporting part on the inner side of the end opposite to the threaded part. The supporting part is annular, and its inner sidewall abuts against the outer sidewall of the embedded part of the inner ring bearing ring, and the two have the same thickness.

5. The bearing nut according to claim 4, characterized in that, The inner diameter of the threaded portion is larger than the inner diameter of the fixed portion, forming a stepped inner cavity structure, which is used to guide the assembly and positioning of the inner ring bearing ring.

6. The bearing nut according to claim 5, characterized in that, The outer periphery contours of the threaded part and the fixed part are consistent, and the outer periphery of both ends of the nut body are chamfered.

7. The bearing nut according to claim 6, characterized in that, The spring ring is a notched annular structure, installed between the annular groove and the fixed groove of the inner bearing ring, and is in a compressed state, providing radial preload and axial buffer through elastic deformation.

8. The bearing nut according to claim 7, characterized in that, The inner bearing ring is detachably connected to the nut body through the elastic support of the spring ring, and the fixing groove and the annular groove are symmetrically distributed to constrain the radial displacement of the spring ring.

9. The bearing nut according to claim 1, characterized in that, The inner ring of the bearing ring is provided with a straight hole, a tapered hole and an eccentric hole in sequence on the inner side. The inner diameter of the tapered hole gradually decreases from the end near the fixed part to the straight hole, and the minimum inner diameter of the tapered hole is equal to the inner diameter of the straight hole.

10. A bearing, characterized in that, Includes the bearing nut as described in any one of claims 1-9.

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