Cylindrical roller and bidirectional thrust roller pin combined bearing

Abstract

The utility model discloses a cylindrical roller and bidirectional thrust roller pin combined bearing, and belongs to the technical field of bearings. Comprises: a bearing support providing a rotary support effect; the bearing rotating part is arranged on the bearing supporting part, the bearing rotating part comprises an axial bearing part, a radial bearing part and a bearing inner ring, the axial bearing part and the radial bearing part are both arranged in the outer ring supporting part, the bearing inner ring is arranged in the axial bearing part and the radial bearing part, and the axial bearing part and the radial bearing part are arranged in the outer ring supporting part. Axial rotary support and radial rotary support are provided by the axial bearing part and the radial bearing part; and the rotary sealing piece is arranged on the bearing supporting piece and plays a role in rotary sealing for the output shaft part. The utility model has the advantages of simple structure, reasonable design, innovative structure, high bearing rigidity, high sealing performance, convenience in use, large rigidity and high precision.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, and more specifically, to a cylindrical roller and bidirectional thrust needle roller combined bearing. Background Art

[0002] As a high-load and high-precision motion bearing mechanism, combined roller bearings have now been widely used in various occasions that require precise rotation and high-rigidity support. The cylindrical roller and bidirectional thrust needle roller combined bearing is a bearing that combines a cylindrical roller bearing and a bidirectional thrust needle roller bearing, so that the combined bearing can withstand both axial force and radial force, so that the combined bearing can be used in sports occasions that need to withstand large overturning bending moments. At present, the cylindrical roller and bidirectional thrust needle roller combined bearings on the market have been widely used in the field of CNC turntables, and are usually called "turntable bearings". The turntable bearings usually have an outer ring and two inner rings. The outer ring has a larger outer diameter than the inner ring. The first inner ring has a radial raceway and an axial raceway. Through the cooperation with the outer ring and the second inner ring, the bearing has three groups of rollers. The upper and lower groups of radial rollers are arranged on both sides of the upper and lower planes of the outer ring, and the middle axial roller is located in the annular space formed by the axial raceway of the first inner ring and the outer cylindrical surface of the outer ring. The first inner ring is connected to the second inner ring by several connecting screws, so that two inner rings, one outer ring, three rows of rollers and the corresponding cage form a whole. The radial rollers are spaced by the cage, and the axial rollers are generally arranged in full roll, so that the bearing has good rotation accuracy and load-bearing rigidity. Since the raceways of turntable bearings with this structure are all open, a rotary sealing structure must be set when in use to prevent the lubricating grease in the bearing raceway from leaking out and contaminating the external structure or being contaminated by the external environment; at the same time, in order to meet other more abundant application scenarios, a cylindrical roller and bidirectional thrust needle roller combination bearing with different structures is designed. While solving the grease sealing problem, it also improves the rich application scenarios of turntable bearings, which has important application prospects. Utility Model Content

[0003] In order to overcome the above defects, the utility model provides a cylindrical roller and bidirectional thrust needle roller combined bearing, which specifically adopts the following technical solutions:

[0004] A cylindrical roller and bidirectional thrust needle roller combined bearing, comprising:

[0005] A bearing support member, which provides a rotation support function;

[0006] A bearing rotating member, which is arranged on the bearing support member, and the bearing rotating member includes an axial bearing member, a radial bearing member and a bearing inner ring, the axial bearing member and the radial bearing member are both arranged in the outer ring support member, the bearing inner ring is arranged in the axial bearing member and the radial bearing member, and is provided with axial rotation support and radial rotation support by the axial bearing member and the radial bearing member;

[0007] The rotary seal is arranged on the bearing support and plays a rotary sealing role for the output shaft part.

[0008] Preferably, the bearing support member comprises an outer ring support member and a support seal, and the support seal plays a sealing role on the outer ring support member for the lubricating grease of the bearing rotating member.

[0009] Preferably, the outer ring support member includes a first bearing outer ring and a second bearing outer ring, the first bearing outer ring is provided with a stepped hole for providing support for the bearing rotating member; the second bearing outer ring is fastened to one end face of the first bearing outer ring by connecting screws to provide support for the bearing rotating member.

[0010] Preferably, the supporting seal comprises an O-ring, and the O-ring is embedded in a sealing groove on an end surface of the first bearing outer ring, so that the first bearing outer ring and the second bearing outer ring are statically sealed.

[0011] Preferably, the axial bearing member comprises a first axial bearing member and a second axial bearing member, and the first axial bearing member and the second axial bearing member are both arranged in the outer ring support member to provide axial rotation support for the bearing inner ring.

[0012] Preferably, the first axial bearing member comprises a radial roller cage and radial rollers, the radial roller cage is embedded in one end hole of the stepped hole, and a plurality of radial rollers are rotatably embedded in pockets on the circumferential direction of the end surface of the radial roller cage.

[0013] Preferably, the second axial bearing member has the same structure as the first axial bearing member, and the second axial bearing member is embedded in an opening at one end of the stepped hole to provide axial support to the bearing inner ring by cooperating with the second bearing outer ring.

[0014] Preferably, the radial bearing member comprises an axial roller, and the axial roller is embedded in a radial raceway on the inner diameter of one end of the stepped hole, and a plurality of the axial rollers are arranged in full rolling along the circumference of the radial raceway.

[0015] Preferably, the bearing inner ring is embedded in an annular raceway formed by the first axial bearing member, the second axial bearing member and the radial bearing member, and the two end faces of the bearing inner ring are respectively rollingly fitted with the first axial bearing member and the second axial bearing member, and the outer side surface of the bearing inner ring is rollingly fitted with the radial bearing member.

[0016] Preferably, the rotary seal is embedded in a rotary seal installation groove on the inner wall of the other end of the stepped hole.

[0017] The utility model at least has the following beneficial effects:

[0018] 1) The utility model cylindrical roller and bidirectional thrust needle roller combined bearing has a simple structure, reasonable design, innovative structure, high load-bearing rigidity, high sealing performance, convenient use, high rigidity and high precision;

[0019] 2) The outer ring support of the cylindrical roller and bidirectional thrust needle roller combined bearing of the utility model is thicker, and the fixed mounting screws and the connecting screws are on the same pitch circle. Under the same installation conditions, the fixed mounting screws will play a role in strengthening the installation rigidity of the bearing itself;

[0020] 3) In the utility model, an O-ring is arranged between the first bearing outer ring and the second bearing outer ring of the cylindrical roller and bidirectional thrust needle roller combined bearing, so that the bearing can be completely sealed to the outside on the external mounting surface. Without adding a sealing device to the bearing itself, there is no need to worry about the risk of grease inside the bearing leaking out. This will greatly simplify the sealing design of the bearing use environment, simplify the design and reduce costs;

[0021] 4) The cylindrical roller and bidirectional thrust needle roller combined bearing of the utility model further enriches the application scenarios of turntable bearings, provides design convenience for turntable bearings to be matched with DD motors or mechanical reduction devices, and provides new ideas for simpler modular design;

[0022] 5) The utility model cylindrical roller and bidirectional thrust needle roller combined bearing does not need to reserve a separate oil filling hole for the bearing. Due to the embedded connected arrangement of the inner cavity of the bearing raceway, the inner cavity can be easily used as the bearing grease storage chamber, or the bearing raceway can be connected with the lubrication channel of the external reduction mechanism, so that the lubrication is more sufficient and the service life is longer.

[0023] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the cylindrical roller and bidirectional thrust needle roller combined bearing of the utility model;

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of the cylindrical roller and bidirectional thrust needle roller combined bearing of the utility model after the outer ring of the first bearing is removed;

[0026] Figure 3 This is a radial section front view of the cylindrical roller and bidirectional thrust needle roller combined bearing of the utility model;

[0027] Figure 4 It is a schematic diagram of the radial cross-section stereoscopic structure of the cylindrical roller and bidirectional thrust needle roller combined bearing of the utility model.

[0028] Among them: 1-first bearing outer ring, 2-second bearing outer ring, 3-connecting screws, 4-mounting through holes, 5-O-rings, 6-bearing inner rings, 7-second axial bearing members, 8-radial roller cages, 9-radial rollers, 10-axial rollers, 11-rotating seals. DETAILED DESCRIPTION

[0029] The following will describe the technical solution of the present invention in detail by way of embodiments with reference to the accompanying drawings. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0030] The term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another type of association object relationship, indicating that there can be two relationships. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0031] according to Figure 1-Figure 4 As shown, a cylindrical roller and bidirectional thrust needle roller combined bearing comprises a bearing support, a bearing rotating member and a rotating seal 11, wherein the bearing rotating member and the rotating seal 11 are both arranged on the bearing support. The bearing support comprises an outer ring support and a supporting seal, wherein the supporting seal is arranged on the outer ring support.

[0032] The outer ring support member includes a first bearing outer ring 1 and a second bearing outer ring 2. The first bearing outer ring 1 is provided with a stepped hole for providing support for the bearing rotating member. The second bearing outer ring 2 is fastened to one end face of the first bearing outer ring 1 by a connecting screw 3 to provide support for the bearing rotating member. Further, the first bearing outer ring 1 is provided with a mounting through hole 4, and the mounting through hole 4 is used to mount the outer ring support member at a predetermined position by a mounting screw. A plurality of mounting through holes 4 are evenly distributed around the first bearing outer ring 1 in the circumferential direction.

[0033] The supporting seal comprises an O-ring 5, which is embedded in a sealing groove on one end face of the first bearing outer ring 1. The sealing groove is an annular groove, and the axis of the sealing groove coincides with the axis of the stepped hole. When the second bearing outer ring 2 is fastened to one end face of the first bearing outer ring 1, the O-ring 5 can improve the static sealing between the second bearing outer ring 2 and the first bearing outer ring 1, and provide sealing for the bearing rotating parts and the lubricating grease in the stepped hole.

[0034] The bearing rotating part includes an axial bearing part, a radial bearing part and a bearing inner ring 6, wherein the axial bearing part and the radial bearing part are both arranged in the outer ring support part, and the bearing inner ring 6 is arranged in the axial bearing part and the radial bearing part. The axial bearing part includes a first axial bearing part and a second axial bearing part 7, wherein the first axial bearing part and the second axial bearing part 7 are both arranged in the outer ring support part. The first axial bearing part includes a radial roller retainer 8 and a radial roller 9, wherein the radial roller retainer 8 is embedded in the stepped surface at one end of the stepped hole, and the radial roller 9 is rotatably embedded in the pocket hole of the end surface of the radial roller retainer 8, and is fixed at intervals by the radial roller retainer 8, and the axis of the radial roller 9 is parallel to the radial line of the stepped hole. A plurality of radial rollers 9 are evenly distributed circumferentially around the radial roller retainer 8. The function is to prevent the radial rollers 9 from being squeezed against each other during rolling and to maintain a constant spacing. The pocket thickness is slightly smaller than the diameter of the radial roller 9, so that the radial roller 9 can be pressed into the pocket with a portion leaking out, which can support the cage from contacting the raceway. Furthermore, the radial cross section of the radial roller cage 8 is T-shaped, and the raised portion of the T-shaped cross section of the radial roller cage 8 serves to retain lubricating grease.

[0035] The second axial bearing member 7 has the same structure as the first axial bearing member. The second axial bearing member 7 is embedded in an opening at one end of the stepped hole and provides axial support to the bearing inner ring 6 by cooperating with the second bearing outer ring 2 .

[0036] The radial bearing member includes an axial roller 10, which is embedded in a radial raceway on the inner diameter of one end of the stepped hole. The radial raceway is in the shape of an annular groove, and the axis of the radial raceway coincides with the axis of the stepped hole, and the center plane of the axial roller 10 coincides with the center plane of the bearing inner ring 6. A plurality of axial rollers 10 are arranged in full rolling along the circumference of the radial raceway.

[0037] The bearing inner ring 6 is embedded in the annular raceway formed by the first axial bearing member, the second axial bearing member 7 and the radial bearing member, and the two end faces of the bearing inner ring 6 are respectively rollingly fitted with the first axial bearing member and the second axial bearing member 7, and the outer side face of the bearing inner ring 6 is rollingly fitted with the radial bearing member. The first axial bearing member and the second axial bearing member 7 cooperate to constrain the axial direction of the bearing inner ring 6, thereby improving the axial stability of the bearing inner ring 6; the radial bearing member constrains the radial direction of the bearing inner ring 6, thereby improving the radial stability of the bearing inner ring 6.

[0038] Specifically, the free end face of the second axial bearing member 7 is in rolling contact with the second bearing outer ring 2. By controlling the torque of the connecting screw 3 and the diameter of the radial roller 9, the axial clearance of the bearing inner ring 6 can be controlled and adjusted to a suitable value according to the motion conditions.

[0039] The rotary seal 11 is embedded in the rotary seal installation groove on the inner wall of the other end of the stepped hole, and the axis of the rotary seal installation groove coincides with the axis of the stepped hole. The rotary seal 11 plays a rotary sealing role for the customer's output shaft part.

[0040] As described above, the utility model cylindrical roller and bidirectional thrust needle roller combined bearing has a simple structure, reasonable design, innovative structure, high load-bearing rigidity, high sealing performance, easy use, large rigidity and high precision; the thickness of the outer ring support member in the utility model cylindrical roller and bidirectional thrust needle roller combined bearing is thicker, and the fixed mounting screws and the connecting screws are on the same pitch circle. Under the same installation conditions, the fixed mounting screws will play a role in strengthening the installation rigidity of the bearing itself; at the same time, an O-ring is arranged between the first bearing outer ring and the second bearing outer ring in the cylindrical roller and bidirectional thrust needle roller combined bearing, so that the bearing can achieve complete sealing of the external mounting surface to the outside, and there is no need to worry about adding a sealing device to the bearing itself. There is a risk of grease leakage inside the core bearing, which will greatly simplify the sealing design of the bearing use environment, simplify the design and reduce costs; further, the cylindrical roller and bidirectional thrust needle roller combination bearing further enriches the application scenarios of turntable bearings, provides design convenience for turntable bearings with DD motors, or mechanical reduction devices, and provides new ideas for simpler modular design; cylindrical roller and bidirectional thrust needle roller combination bearings do not need to reserve separate oil filling holes for the bearings. Due to the embedded connecting arrangement of the inner cavity of the bearing raceway, the inner cavity can be easily used as the bearing's grease storage cavity, or the bearing raceway can be connected to the lubrication channel of the external reduction mechanism, so that the lubrication is more sufficient and the service life is longer.

[0041] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A cylindrical roller and bidirectional thrust needle roller combined bearing, characterized in that: include: A bearing support member, which provides a rotation support function, and the bearing support member includes an outer ring support member and a support seal member; A bearing rotating member, which is arranged on the bearing support member, and the bearing rotating member includes an axial bearing member, a radial bearing member and a bearing inner ring, the axial bearing member and the radial bearing member are both arranged in the outer ring support member, the bearing inner ring is arranged in the axial bearing member and the radial bearing member, and is provided with axial rotation support and radial rotation support by the axial bearing member and the radial bearing member; The rotary seal is arranged on the bearing support and plays a rotary sealing role for the output shaft part.

2. The cylindrical roller and bidirectional thrust needle roller combined bearing according to claim 1, characterized in that: The support seal plays a sealing role on the lubricating grease of the bearing rotating part on the outer ring support.

3. The cylindrical roller and bidirectional thrust needle roller combined bearing according to claim 2 is characterized in that: The outer ring support member includes a first bearing outer ring and a second bearing outer ring. The first bearing outer ring is provided with a stepped hole for providing support for the bearing rotating member. The second bearing outer ring is fastened to one end face of the first bearing outer ring by connecting screws to provide support for the bearing rotating member.

4. The cylindrical roller and bidirectional thrust needle roller combined bearing according to claim 3 is characterized in that: The supporting seal comprises an O-ring, and the O-ring is embedded in a sealing groove on an end surface of the first bearing outer ring, so that the first bearing outer ring and the second bearing outer ring are statically sealed.

5. The cylindrical roller and bidirectional thrust needle roller combined bearing according to claim 4, characterized in that: The axial bearing member includes a first axial bearing member and a second axial bearing member. The first axial bearing member and the second axial bearing member are both arranged in the outer ring support member to provide axial rotation support for the bearing inner ring.

6. The cylindrical roller and bidirectional thrust needle roller combined bearing according to claim 5, characterized in that: The first axial bearing member comprises a radial roller cage and radial rollers. The radial roller cage is embedded in one end hole of the stepped hole, and a plurality of radial rollers are rotatably embedded in pockets on the circumferential direction of the end surface of the radial roller cage.

7. The cylindrical roller and bidirectional thrust needle roller combined bearing according to claim 5, characterized in that: The second axial bearing member has the same structure as the first axial bearing member. The second axial bearing member is embedded in an opening at one end of the stepped hole and provides axial support to the bearing inner ring by cooperating with the second bearing outer ring.

8. The cylindrical roller and bidirectional thrust needle roller combined bearing according to claim 3, characterized in that: The radial bearing member comprises an axial roller, and the axial roller is embedded in a radial raceway on the inner diameter of one end of the stepped hole, and a plurality of the axial rollers are arranged in full rolling along the circumference of the radial raceway.

9. The cylindrical roller and bidirectional thrust needle roller combined bearing according to claim 5, characterized in that: The bearing inner ring is embedded in an annular raceway formed by the first axial bearing member, the second axial bearing member and the radial bearing member, and the two end faces of the bearing inner ring are respectively rollingly fitted with the first axial bearing member and the second axial bearing member, and the outer side face of the bearing inner ring is rollingly fitted with the radial bearing member.

10. The cylindrical roller and bidirectional thrust needle roller combined bearing according to claim 3, characterized in that: The rotary seal is embedded in the rotary seal installation groove on the inner wall of the other end of the stepped hole.

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