Wear-resistant rolling bearing

Abstract

The utility model relates to a wear-resistant rolling bearing. The wear-resistant rolling bearing comprises a bearing outer ring, a bearing inner ring concentrically arranged in the bearing outer ring, a retainer arranged between the bearing outer ring and the bearing inner ring, and a plurality of balls which are arranged on the retainer and are uniformly distributed between the bearing outer ring and the bearing inner ring at equal angles along the circumferential direction, a plurality of detachable wear-resistant blocks which are uniformly distributed at equal angles in the circumferential direction are embedded between the outer circumferential surface and the inner circumferential surface of the bearing outer ring, and the wear-resistant blocks are made of wear-resistant metal materials; a first arc-shaped matching surface is formed on the inner side of each wear-resistant block; each first arc-shaped matching face is further provided with an arc-shaped wear-resisting face, the edges of the close sides of any two adjacent arc-shaped wear-resisting faces coincide with each other, and the arc-shaped wear-resisting faces on the multiple wear-resisting blocks are spliced to form an annular wear-resisting face. According to the utility model, the wear resistance is obviously improved, the service life is effectively prolonged, and the use amount of wear-resistant metal materials is reduced, so that the production cost is prevented from being greatly increased.

Description

Technical Field

[0001] The utility model relates to a wear-resistant rolling bearing. Background Art

[0002] A bearing is an important component in contemporary mechanical equipment. Its function is to limit relative motion within the required range of motion, reduce friction between moving parts, and ensure its rotational accuracy.

[0003] Since the rolling elements inside the bearing will cause continuous wear to the outer ring of the bearing during operation, the current outer rings of bearings are usually made of high-carbon steel or stainless steel. Under the premise of operating conditions that meet conventional rotational speeds and conventional loads, the greatest advantage of the above materials is low production cost; however, due to the large gap in strength between the above materials and wear-resistant metal materials, the wear resistance is poor and the service life is relatively short. If all wear-resistant metal materials are used, the service life of the bearing will be significantly extended, but the production cost will increase significantly, which needs to be further improved. Summary of the Utility Model

[0004] Aiming at the current situation of the above-mentioned prior art, the technical problem to be solved by the utility model is to provide a wear-resistant rolling bearing that significantly improves wear resistance to effectively extend the service life and reduces the usage of wear-resistant metal materials to avoid a significant increase in production cost.

[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows: A wear-resistant rolling bearing includes an outer bearing ring, an inner bearing ring concentrically arranged inside the outer bearing ring, a cage arranged between the outer bearing ring and the inner bearing ring, and a plurality of balls arranged on the cage and evenly distributed at equal angles in the circumferential direction between the outer bearing ring and the inner bearing ring. Its characteristics are as follows:

[0006] A plurality of detachable wear-resistant blocks evenly distributed at equal angles in the circumferential direction are embedded between the outer peripheral surface and the inner peripheral surface of the outer bearing ring. The wear-resistant blocks are in the shape of a square pyramid, the inner side of the wear-resistant block is smaller than its outer side, and the wear-resistant blocks are made of wear-resistant metal materials;

[0007] A first arc-shaped mating surface is formed on the inner side of each wear-resistant block. The adjacent side edges on any two adjacent first arc-shaped mating surfaces coincide with each other. The first arc-shaped mating surfaces on a plurality of wear-resistant blocks are combined to form an annular structural surface;

[0008] An arc-shaped wear-resistant surface is also formed on each first arc-shaped mating surface. The adjacent side edges on any two adjacent arc-shaped wear-resistant surfaces coincide with each other. The arc-shaped wear-resistant surfaces on a plurality of wear-resistant blocks are combined to form an annular wear-resistant surface;

[0009] The outer surface of each ball rolls and fits on the annular wear-resistant surface.

[0010] Preferably, a plurality of square pyramid holes are formed between the outer peripheral surface and the inner peripheral surface of the bearing outer ring, and the square pyramid holes are evenly distributed at equal angles in the circumferential direction. The number of the square pyramid holes is equal to the number of the wear-resistant blocks, and the inner opening of the square pyramid hole is smaller than its outer opening.

[0011] Preferably, each of the wear-resistant blocks is detachably embedded and fixed in a corresponding square pyramid hole, and the four outer side walls of each wear-resistant block are respectively attached to the four inner side walls of the square pyramid hole.

[0012] Preferably, an arc-shaped positioning groove symmetrically distributed with each other is formed on the front and rear end faces of each wear-resistant block, and the two arc-shaped positioning grooves are concentric with the bearing outer ring. The cross-sectional shape of the arc-shaped positioning groove is triangular.

[0013] Preferably, a plurality of threaded through-hole combinations evenly distributed at equal angles in the circumferential direction are further formed on the front and rear end faces of each wear-resistant block. The number of the threaded through-hole combinations is equal to the number of the wear-resistant blocks, and each threaded through-hole combination is arranged outside the arc-shaped positioning groove on a corresponding wear-resistant block.

[0014] Preferably, the threaded through-hole combination includes a plurality of threaded through-holes sequentially arranged in the circumferential direction. A stud is screwed in each threaded through-hole, and the inner end of each stud extends into a corresponding arc-shaped positioning groove and abuts against the inner side wall of the arc-shaped positioning groove to press the wear-resistant block centripetally.

[0015] Preferably, a second arc-shaped mating surface matched with the outer peripheral surface of the bearing outer ring is further formed on the outer side of each wear-resistant block, and a threaded blind hole is formed on the second arc-shaped mating surface.

[0016] Compared with the prior art, the advantages of the present utility model are as follows: the present utility model uses conventional materials to make the bearing outer ring and fixedly embeds a plurality of detachable wear-resistant blocks evenly distributed at equal angles in the circumferential direction in the bearing outer ring. The bearing outer ring only plays a role in supporting and fixing each wear-resistant block, but does not directly contact the rolling balls. It is each wear-resistant block that directly contacts the rolling balls. In this way, it is not necessary to use wear-resistant metal materials to make the whole bearing outer ring, and at the same time, the wear resistance is significantly improved, so that the service life can be effectively prolonged under the same working conditions, and the amount of wear-resistant metal materials used is reduced to avoid a substantial increase in production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the left front exploded structure diagram of the present utility model;

[0018] Figure 2 is the front view sectional exploded structure diagram of the bearing outer ring and the wear-resistant block of the present utility model;

[0019] Figure 3 This is the side view sectional structure diagram of the bearing outer ring of the present utility model;

[0020] Figure 4 This is the side view sectional structure diagram of the wear-resistant block and the stud of the present utility model. Specific embodiments

[0021] Unless otherwise defined, the technical terms or scientific terms used in the present utility model shall have the ordinary meanings understood by those of ordinary skill in the field to which the present utility model belongs. The "first", "second" and similar terms used in the present utility model do not denote any order, quantity or importance, but are only used to distinguish different components. The terms such as "comprising" or "including" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left" and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0022] In order to keep the following description of the embodiments of the present utility model clear and concise, the detailed descriptions of known functions and known components are omitted in the present utility model.

[0023] As Figures 1 to 4 shown, a wear-resistant rolling bearing includes a bearing outer ring 1, a bearing inner ring 2 concentrically arranged inside the bearing outer ring 1, a cage (not shown) arranged between the bearing outer ring 1 and the bearing inner ring 2, and a plurality of balls 3 arranged on the cage (not shown) and evenly distributed at equal angles in the circumferential direction between the bearing outer ring 1 and the bearing inner ring 2. The bearing outer ring 1 and the bearing inner ring 2 can have the function of relative rotation by means of the plurality of balls 3, and the cage (not shown) evenly distributes the balls 3 and guides the rotation of the balls 3. The above structures and principles are all prior arts;

[0024] The characteristics of the present utility model are as follows: A plurality of detachable wear-resistant blocks 4 evenly distributed at equal angles in the circumferential direction are embedded between the outer peripheral surface and the inner peripheral surface of the bearing outer ring 1. The wear-resistant blocks 4 are in the shape of a square pyramid, the inner side of the wear-resistant block 4 is smaller than its outer side, and the wear-resistant blocks 4 are made of wear-resistant metal materials;

[0025] A first arc-shaped mating surface 44 is formed on the inner side of each wear-resistant block 4. The adjacent side edges on any two adjacent first arc-shaped mating surfaces 44 coincide with each other, and the first arc-shaped mating surfaces 44 on the plurality of wear-resistant blocks 4 are joined together to form an annular structural surface;

[0026] Each first arc-shaped mating surface 44 is also provided with an arc-shaped wear-resistant surface 41. The adjacent side edges of any two adjacent arc-shaped wear-resistant surfaces 41 coincide with each other. The arc-shaped wear-resistant surfaces 41 on multiple wear-resistant blocks 4 are pieced together to form an annular wear-resistant surface;

[0027] The outer surface of each ball 3 is in rolling contact with the annular wear-resistant surface.

[0028] A plurality of square tapered holes 11 evenly distributed at equal angles in the circumferential direction are provided between the outer peripheral surface and the inner peripheral surface of the bearing outer ring 1. The number of square tapered holes 11 is equal to the number of wear-resistant blocks 4. The inner opening of the square tapered hole 11 is smaller than its outer opening.

[0029] Each wear-resistant block 4 is detachably embedded and fixed in a corresponding square tapered hole 11. The four outer side walls of each wear-resistant block 4 are respectively in contact with the four inner side walls of the square tapered hole 11.

[0030] An arc-shaped positioning groove 42 symmetrically distributed with each other is provided on the front and rear end faces of each wear-resistant block 4. The two arc-shaped positioning grooves 42 are concentric with the bearing outer ring 1. The cross-sectional shape of the arc-shaped positioning groove 42 is triangular.

[0031] A plurality of threaded through-hole combinations evenly distributed at equal angles in the circumferential direction are also provided on the front and rear end faces of each wear-resistant block 4. The number of threaded through-hole combinations is equal to the number of wear-resistant blocks 4. Each threaded through-hole combination is provided outside the arc-shaped positioning groove 42 on a corresponding wear-resistant block 4.

[0032] The threaded through-hole combination includes a plurality of threaded through-holes 12 arranged in sequence in the circumferential direction. A stud 5 is also screwed in each threaded through-hole 12. The inner end of each stud 5 extends into a corresponding arc-shaped positioning groove 42 and abuts against the inner side wall of the arc-shaped positioning groove 42 to press the wear-resistant block 4 centripetally.

[0033] A second arc-shaped mating surface 45 that cooperates with the outer peripheral surface of the bearing outer ring 1 is also formed on the outside of each wear-resistant block 4. A threaded blind hole 43 is also provided on the second arc-shaped mating surface 45.

[0034] Working principle:

[0035] During the frequent rotation of each ball 3, continuous wear will be generated on the inner wall of the bearing outer ring 1. Due to material cost reasons, the bearing outer ring 1 is made of ordinary steel, but it wears quickly and has a short service life. If the bearing outer ring 1 is all made of wear-resistant metal materials, although the wear-resistant performance can be significantly improved and the service life can be greatly extended, the production cost will increase significantly.

[0036] In the utility model, a plurality of detachable wear-resistant blocks 4 which are evenly distributed at equal angles in the circumferential direction are embedded and fixed in the outer ring 1 of the bearing. The outer surface of each ball 3 is rolled and embedded in the annular wear-resistant surface. The function of the outer ring 1 of the bearing is equivalent to that of a skeleton, which plays a supporting role and is used to fix each wear-resistant block 4. However, the outer ring 1 of the bearing is not in direct contact with the ball 3, thus reducing the amount of wear-resistant metal material used to take into account the production cost and at the same time achieving the purpose of extending the service life.

[0037] If some wear-resistant blocks 4 cannot be used due to severe wear after being used for a long time, the severely worn wear-resistant blocks 4 can be removed and replaced separately, and each of the other parts can continue to be used.

[0038] When disassembling, first screw each stud 5 so that its inner end retracts into the threaded through hole 12, then screw the matching bolt into the threaded blind hole 43 appropriately and pull it outward, and the wear-resistant block 4 can be taken out from the square tapered hole 11; then, put the new wear-resistant block 4 into the above-mentioned square tapered hole 11 and tighten each stud 5 so that its inner end presses against the inner wall of the arc-shaped positioning groove 42, thereby forcing the wear-resistant block 4 to be pressed inwardly and centripetally to ensure that the arc-shaped wear-resistant surface 41 on each wear-resistant block 4 is spliced ​​into a ring-shaped wear-resistant surface and will not loosen.

[0039] The utility model uses conventional materials to manufacture the bearing outer ring 1 and embeds and fixes a plurality of detachable wear-resistant blocks 4 which are evenly distributed at equal angles along the circumferential direction in the bearing outer ring 1. The bearing outer ring 1 only supports and fixes each wear-resistant block 4, but does not directly contact the ball 3. It is each wear-resistant block 4 that is in direct contact with the ball 3. In this way, there is no need to use wear-resistant metal materials to manufacture the entire bearing outer ring 1. At the same time, the wear resistance is significantly improved, thereby effectively extending the service life under the same working conditions, and reducing the amount of wear-resistant metal materials to avoid a substantial increase in production costs.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A wear-resistant rolling bearing, comprising a bearing outer ring, a bearing inner ring concentrically arranged inside the bearing outer ring, a cage arranged between the bearing outer ring and the bearing inner ring, and a plurality of balls arranged on the cage and uniformly distributed at equal angles along the circumferential direction between the bearing outer ring and the bearing inner ring, characterized in that: A plurality of detachable wear-resistant blocks are embedded between the outer circumferential surface and the inner circumferential surface of the bearing outer ring and are evenly distributed at equal angles along the circumferential direction. The wear-resistant blocks are in the shape of square pyramids, the inner side of the wear-resistant blocks is smaller than the outer side thereof, and the wear-resistant blocks are made of wear-resistant metal material; A first arc-shaped matching surface is formed on the inner side of each wear-resistant block, and the adjacent side edges of any two adjacent first arc-shaped matching surfaces overlap each other, and the first arc-shaped matching surfaces on multiple wear-resistant blocks are assembled to form an annular structural surface; Each of the first arc-shaped mating surfaces is also provided with an arc-shaped wear-resistant surface, and the adjacent side edges of any two adjacent arc-shaped wear-resistant surfaces overlap each other, and the arc-shaped wear-resistant surfaces on multiple wear-resistant blocks are combined to form an annular wear-resistant surface; The outer surface of each ball rolls on the annular wear-resistant surface.

2. A wear-resistant rolling bearing according to claim 1, characterized in that: A plurality of square pyramidal holes uniformly distributed at equal angles along the circumferential direction are provided between the outer circumferential surface and the inner circumferential surface of the bearing outer ring. The number of the square pyramidal holes is equal to the number of the wear-resistant blocks, and the inner opening of the square pyramidal hole is smaller than the outer opening.

3. A wear-resistant rolling bearing according to claim 2, characterized in that: Each of the wear-resistant blocks is detachably embedded and fixed in a corresponding square pyramid hole, and the four outer walls of each of the wear-resistant blocks are respectively fitted on the four inner walls of the square pyramid hole.

4. A wear-resistant rolling bearing according to claim 3, characterized in that: Each of the wear-resistant blocks is provided with an arc-shaped positioning groove symmetrically distributed with respect to each other on the front and rear end surfaces, and the two arc-shaped positioning grooves are both concentrically arranged with the outer ring of the bearing, and the cross-sectional shape of the arc-shaped positioning groove is a triangle.

5. A wear-resistant rolling bearing according to claim 4, characterized in that: Each of the wear-resistant blocks is also provided with a plurality of threaded through hole combinations uniformly distributed at equal angles along the circumferential direction on the front and rear end faces. The number of the threaded through hole combinations is equal to the number of the wear-resistant blocks, and each of the threaded through hole combinations is arranged on the outer side of the arc-shaped positioning groove on a corresponding wear-resistant block.

6. A wear-resistant rolling bearing according to claim 5, characterized in that: The threaded through hole combination includes a plurality of threaded through holes arranged in sequence along the circumferential direction, each of the threaded through holes is also threaded with a stud, the inner end of each stud extends into a corresponding arc-shaped positioning groove and is pressed against the inner wall of the arc-shaped positioning groove to centripetally press the wear-resistant block.

7. The wear-resistant rolling bearing according to claim 1, characterized in that: A second arc-shaped mating surface that cooperates with the outer peripheral surface of the bearing outer ring is formed on the outer side of each wear-resistant block, and a threaded blind hole is also formed on the second arc-shaped mating surface.

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