Bearing fastening structure

Abstract

The utility model discloses a bearing fastening structure, a casing is provided with a bearing mounting hole and a fastening hole, an upper opening of the bearing mounting hole coincides with a lower opening of the fastening hole, a bearing is arranged in the bearing mounting hole, the side wall of the fastening hole is provided with a limiting groove, the limiting groove extends from one end of the fastening hole to the other end of the fastening hole, and the bearing is arranged in the bearing mounting hole. A limiting groove is formed in the bearing, the limiting groove is in sliding connection with a locking gasket, the locking gasket is provided with a limiting boss, the limiting boss is matched with the limiting groove, the fastening hole is in threaded connection with a locking nut, and the locking gasket is located between the locking nut and the bearing; with the adoption of the structure, the stability of the bearing is improved, and the bearing is suitable for motors.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor technical field, concretely relates to a bearing fastening structure. BACKGROUND

[0002] The motor will inevitably suffer impact load in the movement process, especially in some linear motion motor design (for example, brake motor), the bearing locking structure is bad, will make the NVH performance of motor reduces, motor operation is abnormal, the motor performance and reliability reduces and so on bad influence, therefore, research and development new type bearing fastening structure to improve the stability of bearing is inevitable. SUMMARY

[0003] The utility model discloses a bearing fastening structure, aims at solving the problem of bearing locking structure bad in the background art.

[0004] To achieve the above object, the technical scheme adopted by the utility model is as follows:

[0005] A bearing fastening structure, including the casing, the casing is equipped with bearing mounting hole and fastening hole, the upper mouth of bearing mounting hole coincides with the lower mouth of fastening hole, is equipped with the bearing in bearing mounting hole, the lateral wall of fastening hole is equipped with the limit slot, the limit slot extends from one end to the other end of fastening hole, the limit slot slidingly connects the stop washer, the stop washer is equipped with the limit boss, the limit boss is adapted to the limit slot, the fastening hole is connected with the locking nut, and the stop washer is located between the locking nut and the bearing.

[0006] As a limitation, the limit slot is several, and each limit slot is arranged at intervals along the circumference of the fastening hole, and the limit boss corresponds to the limit slot one by one.

[0007] As another limitation, the width of the stop washer is adapted to the width of the bearing outer ring.

[0008] As another limitation, the inner side of the locking nut is an inner nine-angle structure.

[0009] As another limitation, the bearing mounting hole is provided with an inner boss away from the fastening hole end, and the inner wall of the inner boss abuts against the outer wall of the bearing.

[0010] As another limitation, the inner boss is fixedly connected with the outer ring of the bearing.

[0011] Compared with the prior art, the technical progress obtained by the utility model is that:

[0012] The housing of this utility model has a bearing mounting hole and a fastening hole. The upper opening of the bearing mounting hole coincides with the lower opening of the fastening hole. A bearing is installed inside the bearing mounting hole. A limiting groove is provided on the side wall of the fastening hole, extending from one end of the fastening hole to the other end. A stop washer is slidably connected to the limiting groove. The stop washer has a limiting boss that matches the limiting groove. A lock nut is threaded into the fastening hole. The stop washer is located between the lock nut and the bearing. The stop washer prevents the lock nut from directly contacting the bearing, improving the stability of the lock nut and further improving the stability of the bearing. This solves the problem of poor bearing locking structure mentioned in the background art. In summary, this utility model adopts the above structure, which improves the stability of the bearing and is suitable for motors. Attached Figure Description

[0013] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0014] In the attached diagram:

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is an embodiment of the present utility model. Figure 1 A sectional view;

[0017] Figure 3 This is an exploded structural diagram of the housing, bearing, locking washer, and locking nut of this utility model embodiment;

[0018] Figure 4 This is a schematic diagram of the structure of the stop washer and the limiting boss in an embodiment of the present invention;

[0019] Figure 5 This is a schematic diagram of the structure of the housing, bearing, stop washer, limiting boss and limiting groove in an embodiment of this utility model.

[0020] Components marked: 1-Housing, 2-Bearing mounting hole, 3-Fasting hole, 4-Bearing, 5-Limit groove, 6-Stop washer, 7-Limit boss, 8-Inner boss, 9-Locking nut. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Example 1: A bearing fastening structure

[0023] This embodiment discloses a bearing fastening structure, such as Figure 1 ,Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 As shown in the drawings, including the shell 1, the shell 1 machine tool opening has a bearing mounting hole 2 and a fastening hole 3, the upper opening of the bearing mounting hole 2 coincides with the lower opening of the fastening hole 3, the bearing mounting hole 2 is integrally formed with the fastening hole 3 and the shell 1, the diameter of the fastening hole 3 is greater than or equal to the diameter of the bearing mounting hole 2, the bearing 4 is connected in the bearing mounting hole 2 by interference, the side wall of the fastening hole 3 is provided with a limiting groove 5 by machine tool opening, the limiting groove 5 extends from one end to the other end of the fastening hole 3, the limiting groove 5 is slidably connected with a stop washer 6, the stop washer 6 can be fixedly connected with a limiting boss 7 by welding, the stop washer 6 can also be integrally formed with the limiting boss 7, the limiting boss 7 is matched with the limiting groove 5, the fastening hole 3 is threadedly connected with a locking nut 9, the stop washer 6 is located between the locking nut 9 and the bearing 4, when the locking nut 9 is in the working position, the stop washer 6 presses the outer ring of the bearing 4, avoiding the direct contact between the locking nut 9 and the bearing 4, improving the stability of the locking nut 9, and further improving the stability of the bearing 4; when the bearing outer ring is loaded with 7700N load, the contact stress ratio of the locking nut outer thread is:

[0024]

[0025] The problem of the poor bearing locking structure in the background art is solved; in use, first, the bearing 4 is installed in the bearing mounting hole 2 of the shell 1 by the principle of thermal expansion and cold contraction, then the limiting boss 7 of the stop washer 6 is aligned with the limiting groove 5 of the fastening hole 3, so that the bottom wall of the stop washer 6 contacts the top wall of the outer ring of the bearing 4, then the locking nut 9 is threadedly connected with the fastening hole 3, and the locking nut 9 is tightened to press the outer ring of the bearing 4 with the stop washer 6; thus, the advantages of the embodiment are that the above-mentioned arrangement improves the stability of the bearing 4.

[0026] As shown in the drawings, Figure 4 、 Figure 5 The limiting groove 5 can be single, and the limiting groove 5 can be multiple, the multiple limiting grooves 5 are arranged along the circumference of the fastening hole 3, the number of the limiting boss 7 is equal to the number of the limiting groove 5, and the limiting boss 7 corresponds to the limiting groove 5 one by one, the arrangement of the multiple limiting grooves 5 and the multiple limiting bosses 7 further improves the stability of the stop washer 6, and further improves the stability of the bearing 4; the width of the stop washer 6 is matched with the width of the outer ring of the bearing 4, this arrangement can press the outer ring of the bearing 4 with the stop washer 6, so as to increase the friction between the stop washer 6 and the outer ring of the bearing 4, and further increase the stability of the bearing 4.

[0027] As shown in the drawings, Figure 3As shown, the inner side of the locking nut 9 has an inner nine-corner structure. The inner side of the locking nut 9 can also have an inner four-corner, inner triangular, inner hexagonal, or other structures. This design makes it convenient to tighten the locking nut 9 using appropriate tools.

[0028] like Figure 2 , Figure 3 As shown, the housing 1 is fixedly connected to the inner boss 8 by welding. The inner boss 8 can also be integrally formed with the housing 1. The inner boss 8 is located at the end of the bearing mounting hole 2 away from the fastening hole 3. The inner wall of the inner boss 8 abuts against the outer ring side wall of the bearing 4. The inner boss 8 can be fixedly connected to the outer ring of the bearing 4 by welding. The welding method can be laser welding or argon arc welding. This setting further improves the stability of the bearing 4.

[0029] The working principle of this utility model embodiment is as follows:

[0030] In use, firstly, the bearing 4 is installed in the bearing mounting hole 2 of the housing 1 by means of thermal expansion and contraction. Then, the limiting boss 7 of the retaining washer 6 is aligned with the limiting groove 5 of the fastening hole 3, so that the bottom wall of the retaining washer 6 contacts the top wall of the outer ring of the bearing 4. Then, the locking nut 9 is threaded into the fastening hole 3 and tightened to make the retaining washer 6 press against the outer ring of the bearing 4.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A bearing fastening structure characterized by: The application relates to a bearing installation hole (2) and a fastening hole (3) are arranged on a casing (1), the upper opening of the bearing installation hole (2) coincides with the lower opening of the fastening hole (3), a bearing (4) is arranged in the bearing installation hole (2), a limiting groove (5) is arranged on the side wall of the fastening hole (3), the limiting groove (5) extends from one end of the fastening hole (3) to the other end, a stop washer (6) is slidably connected to the limiting groove (5), the stop washer (6) is provided with a limiting boss (7) matched with the limiting groove (5), the fastening hole (3) is threadedly connected with a locking nut (9), and the stop washer (6) is located between the locking nut (9) and the bearing (4).

2. The bearing fastening structure according to claim 1, characterized by: The limiting groove (5) is arranged in plurality, each limiting groove (5) is arranged along the circumference of the fastening hole (3) and is spaced apart, and the limiting boss (7) is matched with the limiting groove (5) in one-to-one correspondence.

3. The bearing fastening structure according to claim 1, characterized by: The width of the stop washer (6) is matched with the width of the outer ring of the bearing (4).

4. The bearing fastening structure according to claim 1, characterized by: The inner side of the locking nut (9) is an inner nine-angle structure.

5. The bearing fastening structure according to claim 1, characterized by: The bearing installation hole (2) is provided with an inner boss (8) away from the fastening hole (3), and the inner wall of the inner boss (8) abuts against the side wall of the outer ring of the bearing (4).

6. The bearing fastening structure according to claim 5, characterized by: The inner boss (8) is fixedly connected with the outer ring of the bearing (4).

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