Self-locking needle bearing

Abstract

The utility model relates to the technical field of bearings, in particular to a self-locking needle roller bearing, which comprises a shaft body, a needle roller bearing and a needle roller bearing, the top surface of the positioning ring protrudes to form an inner positioning lip and an outer positioning lip, a clamping groove is formed between the inner positioning lip and the outer positioning lip in a spaced mode, the positioning ring is arranged in the shaft body, the outer wall surface of the positioning ring is attached to the inner wall surface of the cavity of the shaft body, the end cover is used for fixing the shaft body and the positioning ring, and the bottom surface of the end cover protrudes to form an inner fixing lip and an outer fixing lip. The fixed inner lips and the fixed outer lips are arranged at intervals to form fixed grooves; through the design of a positioning inner lip, a positioning embedding part and a clamping groove on the positioning ring, a fixed inner lip, a fixed outer lip and a fixed groove on the end cover and the shaft body, primary fixation is formed under the cooperation of the clamping groove and the fixed inner lip, and secondary fixation is formed by embedding the shaft body and the positioning outer lip into the fixed groove under the cooperation of the shaft body and the positioning outer lip. The end cover and the shaft body form three-stage fixation, the connecting effect of the end cover and the shaft body is guaranteed, and the end cover is prevented from loosening.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing technical field especially is related to a self -locking type needle bearing. BACKGROUND

[0002] The needle bearing without retainer is mainly composed of inner and outer rings and needles, and does not have the traditional retainer structure. This design enables the needle to move freely during operation, thereby being able to bear higher radial load and having higher rotation accuracy and lower noise. The existing needle bearing without retainer is fixed in the axial direction after assembly, and the connection and fixation of the shaft body and the end cover are relied on. However, the shaft body and the end cover are fixed through interference fit. After long-term operation of the needle bearing, the end cover is loose or even detached, which causes the needle to move radially and reduces the rotation effect of the needle bearing. SUMMARY

[0003] The utility model solves the technical problems that the shaft body and the end cover are fixed through interference fit in the prior art, the end cover is loose or even detached after long-term operation of the needle bearing, the needle moves radially, and the rotation effect of the needle bearing is reduced. A self-locking needle bearing is provided.

[0004] The utility model adopts the technical scheme that a self-locking needle bearing comprises:

[0005] The shaft body has a cavity in the middle part, and one end of the shaft body is open;

[0006] The positioning ring has a positioning inner lip and a positioning outer lip protruding from the top surface, and the positioning outer lip is located outside the positioning inner lip. A clamping groove is formed between the positioning inner lip and the positioning outer lip. The positioning ring is arranged in the shaft body, and the outer wall surface of the positioning ring is attached to the inner wall surface of the cavity of the shaft body,

[0007] The end cover is used to fix the shaft body and the positioning ring. The end cover has a fixed inner lip and a fixed outer lip protruding from the bottom surface, and the fixed inner lip is matched with the clamping groove. The fixed outer lip is matched with the shaft body. The fixed inner lip and the fixed outer lip are arranged to form a fixed groove. The fixed outer lip is located outside the fixed inner lip. The fixed inner lip is embedded in the clamping groove. The fixed inner lip is embedded in the clamping groove. The positioning outer lip and the shaft body are embedded in the fixed groove;

[0008] And several rollers are arranged in the cavity of the shaft body, the rollers are sequentially arranged along the inner wall of the cavity of the shaft body, and the rotating surfaces of two adjacent rollers are in contact, the rollers are located between the positioning ring and the sealing end of the shaft body, and the connection effect of the end cover and the shaft body is ensured by the design of the positioning inner lip, the positioning fitting part and the clamping groove on the positioning ring, the fixed inner lip, the fixed outer lip and the fixed groove on the end cover and the shaft body, and the first fixing is formed by the cooperation of the clamping groove and the fixed inner lip, the second fixing is formed by the cooperation of the shaft body and the positioning outer lip and the embedding of the fixed groove, and the third fixing is formed by the end cover and the shaft body, so that the end cover is prevented from loosening.

[0009] In order to solve the problem that the roller is not firmly installed, the roller bearing further comprises an upper washer and a lower washer, the upper washer is arranged between the positioning ring and the roller, and the lower washer is arranged between the roller and the shaft body.

[0010] In order to solve the problem that it is inconvenient to confirm whether the roller is attached to the inner wall of the shaft body during installation of the roller, the lower washer is provided with a placement table formed by protruding on one end close to the roller, and the placement table has a ring structure.

[0011] In order to solve the problem that the connection between the positioning ring and the end cover is stable due to machining error, the positioning inner lip is bent to form a positioning fitting part close to the positioning outer lip, and the positioning fitting part is used to abut against the inner wall surface of the fixed inner lip.

[0012] In order to solve the problem that the connection between the positioning ring and the end cover is stable due to machining error, the fixed inner lip is inclined close to the fixed outer lip.

[0013] In order to solve the problem that the outer wall of the end cover protrudes from the surface of the shaft body and affects use, the outer wall surface of the shaft body is recessed to form a limiting groove, the fixed outer lip is arranged in the limiting groove, and the fixed outer lip abuts against the groove bottom of the limiting groove.

[0014] In order to solve the problem that the connection between the shaft body and the end cover is stable due to machining error, the side wall surface of the limiting groove is recessed to form a clamping groove, the inner wall surface of the fixed outer lip is protruded to form a clamping block matched with the clamping groove, and the clamping block is embedded in the clamping groove.

[0015] In order to solve the problem that the connection between the shaft body and the end cover is stable due to machining error and lacks an effective stress release structure, resulting in local stress concentration and affecting service life, the inner bottom surface of the shaft body is recessed downward to form a force releasing groove on the outer periphery, the force releasing groove is used to pull the roller to make the roller attach to the inner wall of the shaft body, the inner bottom surface of the shaft body is protruded to form a positioning part, the positioning part is located in the force releasing groove, and a mounting part for the roller is formed between the force releasing groove and the positioning part.

[0016] The utility model discloses an advantageous effect is: the utility model discloses a kind of self-locking needle roller bearing, by the positioning inner lip on positioning ring, positioning inlay part and clamping groove, fixed inner lip, fixed outer lip and fixed groove on end cover and the design of shaft body, constitute one level fixed under the cooperation of clamping groove and fixed inner lip, embed fixed groove under the cooperation of shaft body and positioning outer lip and constitute two level fixed, end cover and shaft body constitute three level fixed, guarantee the connecting effect of end cover and shaft body, avoid end cover loosening. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model is further described below in connection with the drawings and examples.

[0018] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;

[0019] Figure 2 It is the schematic diagram of explosion structure of the utility model;

[0020] Figure 3 It is the schematic diagram of explosion structure of another view of the utility model;

[0021] Figure 4 It is the schematic diagram of explosion structure of the utility model in front view state;

[0022] Figure 5 It is the schematic diagram of cross section structure of the utility model Figure 4 A-A place;

[0023] Figure 6 It is the schematic diagram of structure of the utility model;

[0024] Figure 7 It is the schematic diagram of cross section structure of the utility model Figure 6 B-B place.

[0025] In the drawing: 1, shaft body, 11, cavity, 12, limit slot, 13, clamping groove;

[0026] 2, positioning ring, 21, positioning inner lip, 211, positioning inlay part, 22, positioning outer lip, 23, clamping groove;

[0027] 3, end cover, 31, fixed inner lip, 32, fixed outer lip, 33, fixed groove, 34, clamping block;

[0028] 4, roller;

[0029] 5, upper gasket;

[0030] 6, lower gasket, 61, placement platform. DETAILED DESCRIPTION

[0031] The utility model will be further explained in detail in connection with the drawings. These drawings are all simplified schematic diagrams, and only schematically show the basic structure of the utility model, so they only show the structure related to the utility model.

[0032] As Figure 1 It is the structure diagram of the utility model, a self-locking type needle bearing, comprising:

[0033] The shaft body 1 has a cavity 11 in the middle part, and one end of the shaft body 1 is open;

[0034] As Figure 2 , 3 , 5, 7, the positioning ring 2, the top surface is convex and forms a positioning inner lip 21 and a positioning outer lip 22, the positioning outer lip 22 is located outside the positioning inner lip 21, and a clamping groove 23 is formed between the positioning inner lip 21 and the positioning outer lip 22, the positioning ring 2 is arranged in the shaft body 1, and the outer wall surface of the positioning ring 2 is attached to the inner wall surface of the cavity 11 of the shaft body 1, the positioning inner lip 21 is bent to form a positioning fitting part 211 towards the positioning outer lip 22, the positioning fitting part 211 is used to abut against the inner wall surface of the fixed inner lip 31, and the bent positioning fitting part 211 makes the clamping groove 23 form a converging port, and the positioning fitting part 211 abutting against the fixed inner lip 31 further strengthens the connection and fixation. After installation, the top surface of the positioning outer lip 22 of the positioning ring 2 and the top surface of the positioning inner lip 21 are flush with the top surface of the shaft body 1.

[0035] As Figure 2 , 3 , 5, 7, the end cover 3 is used for fixing the shaft body 1 and the positioning ring 2, the bottom surface of the end cover 3 is convex and forms a fixed inner lip 31 matched with the clamping groove 23 and a fixed outer lip 32 matched with the shaft body 1, the fixed inner lip 31 and the fixed outer lip 32 are arranged at intervals to form a fixed groove 33, the fixed outer lip 32 is located outside the fixed inner lip 31, the fixed inner lip 31 is embedded in the clamping groove 23, the fixed inner lip 31 is fitted in the clamping groove 23, and the positioning outer lip 22 and the shaft body 1 are fitted in the fixed groove 33; a primary fixation is formed under the cooperation of the clamping groove 23 and the fixed inner lip 31, a secondary fixation is formed under the cooperation of the shaft body 1 and the positioning outer lip 22 embedded in the fixed groove 33, a tertiary fixation is formed by the end cover 3 and the shaft body 1, the connection effect of the end cover 3 and the shaft body 1 is ensured, and the end cover is prevented from loosening.

[0036] The fixed inner lip 31 is inclined towards the fixed outer lip 32, so that the fixed groove 33 forms a tapered port, and the fixed inner lip 31 and the fixed outer lip 32 clamp the positioning outer lip 22 and the shaft body 1 more firmly, and the connection is strengthened.

[0037] The outer wall surface of the shaft body 1 is recessed to form a limiting groove 12, the fixed outer lip 32 is arranged in the limiting groove 12, and the fixed outer lip 32 abuts against the groove bottom of the limiting groove 12, so that the outer wall surface of the end cover 3 is located in the limiting groove 12 of the shaft body 1, avoiding the end cover 3 protruding from the outer wall surface of the shaft body and affecting the use of the bearing.

[0038] The side wall surface of the limiting groove 12 is recessed to form a clamping groove 13, the inner wall surface of the fixed outer lip 32 is protruded to form a clamping block 34 matched with the clamping groove 13, the clamping block 34 is embedded in the clamping groove 13, and the connection of the end cover 3 and the shaft body 1 is realized through the cooperation of the clamping groove 13 and the clamping block 34, thereby strengthening the connection.

[0039] As shown in Figure 2 , 3 , 5, 7, a plurality of rollers 4 are arranged in the cavity 11 of the shaft body 1, the rollers 4 are arranged in sequence along the inner wall of the cavity 11 of the shaft body 1, and the rotating surfaces of adjacent two rollers 4 are in contact, and the rollers 4 are located between the positioning ring 2 and the sealing end of the shaft body 1.

[0040] As shown in Figure 2 , 3 , 5, 7, the needle bearing comprises an upper washer 5 and a lower washer 6, the upper washer 5 is arranged between the positioning ring 2 and the roller 4, and the lower washer 6 is arranged between the roller 4 and the shaft body 1.

[0041] The lower washer 6 is protruded at one end close to the roller 4 to form a placing table 61, the placing table 61 has a ring structure, and the efficiency of placing the roller is improved.

[0042] The inner bottom surface of the shaft body 1 is recessed downward to form a force relieving groove 14 on the outer periphery, the force relieving groove 14 is used for dragging the roller 4 to make the roller 4 adhere to the inner wall of the shaft body 1, the recessed structure of the force relieving groove 14 forms a guide track, the motion track of the roller is accurately controlled, the arc-shaped bottom surface of the force relieving groove 14 forms a stress buffer zone, the contact stress is effectively dispersed, the inner bottom surface of the shaft body 1 is protruded to form a positioning portion 15, the positioning portion 15 is located in the force relieving groove 14, and a mounting portion for the roller 4 is formed between the force relieving groove 14 and the positioning portion 15, the cooperation of the positioning portion 15 and the force relieving groove 14 realizes three-dimensional positioning, the axis of the roller 4 is ensured to be parallel to the center line of the shaft body 1, the protruding structure of the positioning portion 15 provides radial support, and at the same time allows axial micro-adjustment.

[0043] The fixed connection structure formed by the cooperation of the end cover 3, the positioning ring 2 and the shaft body 1, or the cooperation of two of them, mutually influences and cooperates, thereby strengthening the connection strength of the shaft body 1 and the end cover 3, making the bearing have great resistance in use, being able to reduce, even fill up the vibration of the bearing, and ensuring the use performance of the bearing.

[0044] With the above ideal embodiment of the present application as the inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A self-locking needle roller bearing, characterized in that It comprises: a shaft body (1) with a cavity (11) in the middle and an opening at one end; a positioning ring (2) with a positioning inner lip (21) and a positioning outer lip (22) on the top surface, the positioning outer lip (22) is located outside the positioning inner lip (21), a clamping groove (23) is formed between the positioning inner lip (21) and the positioning outer lip (22), the positioning ring (2) is arranged in the shaft body (1), and the outer wall surface of the positioning ring (2) is attached to the inner wall surface of the cavity (11) of the shaft body (1), an end cover (3) for fixing the shaft body (1) and the positioning ring (2), the bottom surface of the end cover (3) is convex and forms a fixed inner lip (31) matched with the clamping groove (23) and a fixed outer lip (32) matched with the shaft body (1), the fixed inner lip (31) and the fixed outer lip (32) are arranged at intervals to form a fixed groove (33), the fixed outer lip (32) is located outside the fixed inner lip (31), the fixed inner lip (31) is embedded in the clamping groove (23), the fixed inner lip (31) is fitted in the clamping groove (23), the positioning outer lip (22) and the shaft body (1) are fitted and embedded in the fixed groove (33), and a plurality of rollers (4) arranged in the cavity (11) of the shaft body (1), the rollers (4) are arranged in sequence along the inner wall of the cavity (11) of the shaft body (1), and the rotating surfaces of adjacent two rollers (4) are in contact, the rollers (4) are located between the positioning ring (2) and the sealing end of the shaft body (1).

2. A self-locking needle bearing as claimed in claim 1, characterized in that: The needle roller bearing comprises an upper washer (5) and a lower washer (6), the upper washer (5) is arranged between the positioning ring (2) and the roller (4), and the lower washer (6) is arranged between the roller (4) and the shaft body (1).

3. A self-locking needle bearing as claimed in claim 2, characterized in that: The lower washer (6) is convex at one end close to the roller (4) and forms a placement table (61), and the placement table (61) is in a ring structure.

4. A self-locking needle bearing as claimed in claim 1, characterized in that: The positioning inner lip (21) is bent towards the positioning outer lip (22) to form a positioning fitting part (211), and the positioning fitting part (211) is used to abut against the inner wall surface of the fixed inner lip (31).

5. A self-locking needle bearing as in claim 1, wherein: The fixed inner lip (31) is inclined towards the fixed outer lip (32).

6. A self-locking needle bearing as in claim 1, wherein: The outer wall surface of the shaft body (1) is recessed to form a limiting groove (12), the fixed outer lip (32) is arranged in the limiting groove (12), and the fixed outer lip (32) abuts against the groove bottom of the limiting groove (12).

7. A self-locking needle bearing as claimed in claim 6, characterized in that: The side wall surface of the limiting groove (12) is recessed to form a clamping groove (13), the inner wall surface of the fixed outer lip (32) is convex to form a clamping block (34) matched with the clamping groove (13), and the clamping block (34) is fitted in the clamping groove (13).

8. A self-locking needle bearing as in claim 1, wherein: The inner bottom surface of the shaft body (1) is recessed downwards to form a force relieving groove (14) at the outer periphery, the force relieving groove (14) is used to pull the roller (4) so that the roller (4) is attached to the inner wall of the shaft body (1), the inner bottom surface of the shaft body (1) is convex to form a positioning part (15), the positioning part (15) is located in the force relieving groove (14), and a mounting part for the roller (4) is formed between the force relieving groove (14) and the positioning part (15).

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