Bearing seat structure for preventing bearing chamber from creeping and outer rotor motor

Abstract

The utility model discloses a bearing seat structure of preventing bearing chamber creep, including bearing seat and the steel cover of inside sleeve in bearing seat, the middle of steel cover forms the bearing chamber for installing bearing, the steel cover include cylinder portion, its characterized in that: there are several bosses in the circumferential interval protruding at the top of cylinder portion, form the recess between two adjacent bosses, and the bearing seat fills in the recess inside and prevents the circumferential rotation of steel cover.

Description

Technical Field

[0001] This utility model relates to a bearing housing structure and an external rotor motor for preventing bearing housing creep. Background Technology

[0002] The existing wear-resistant bearing housing structure can be referenced from utility model patent CN201937374(U), which includes a steel sleeve and a bearing housing. The problems and disadvantages of this structure are as follows:

[0003] 1. The existing steel sleeve lacks an anti-rotation design on the end face;

[0004] 2. The existing steel sleeves are processed using 45# steel pipes, which is costly. Summary of the Invention

[0005] The purpose of this invention is to provide a bearing housing structure and an external rotor motor that prevents bearing housing creep, thereby solving the technical problem that the ends of existing steel sleeves do not have anti-rotation design, leading to circumferential rotation.

[0006] The technical solution of this utility model is implemented as follows:

[0007] A bearing housing structure for preventing bearing housing creep includes a bearing housing and a steel sleeve fitted inside the bearing housing. A bearing housing for mounting the bearing is formed in the middle of the steel sleeve. The steel sleeve includes a cylindrical portion. The characteristic feature is that a plurality of bosses protrude circumferentially at intervals at the top end of the cylindrical portion, and a groove is formed between two adjacent bosses. The bearing housing is filled in the groove to prevent the steel sleeve from rotating circumferentially.

[0008] Preferably, the bottom end of the cylindrical section is bent inward to form an annular step.

[0009] Preferably, the bearing housing is made of aluminum, and the bearing housing and the steel sleeve are formed as one piece through a casting process.

[0010] Preferably, four protrusions are evenly spaced around the top of the cylindrical part.

[0011] Preferably, the steel sleeve is formed by stamping thin steel.

[0012] An external rotor motor includes a stator assembly, a rotor assembly, and an end cover. The end cover includes a base plate and a hollow sleeve portion axially protruding from the middle of the base plate. The end of the sleeve portion forms a bearing seat. The bearing seat at the end of the sleeve portion adopts a bearing seat structure for preventing bearing chamber creep as described above.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] 1. This utility model includes a bearing housing and a steel sleeve fitted inside the bearing housing. A bearing chamber for installing the bearing is formed in the middle of the steel sleeve. The steel sleeve includes a cylindrical part with several protrusions circumferentially spaced at the top of the cylindrical part. A groove is formed between two adjacent protrusions. The bearing housing is filled in the groove to prevent the steel sleeve from rotating circumferentially.

[0015] 2. Other advantages of this utility model are described in detail in the embodiment section of the specification. Attached Figure Description

[0016] Figure 1 A perspective view provided for Embodiment 1 of this utility model;

[0017] Figure 2 An exploded view provided for Embodiment 1 of this utility model;

[0018] Figure 3 A perspective view of the steel sleeve provided in Embodiment 1 of this utility model from one angle;

[0019] Figure 4 A perspective view of the steel sleeve provided in Embodiment 1 of this utility model from another angle;

[0020] Figure 5 This is a structural cross-sectional view provided for Embodiment 1 of the present utility model;

[0021] Figure 6 for Figure 5 AA section view;

[0022] Figure 7 This is a structural cross-sectional view of Embodiment 2 of this utility model. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] Example 1:

[0025] like Figures 1 to 6As shown, this embodiment provides a bearing housing structure to prevent bearing housing creep, including a bearing housing 1 and a steel sleeve 2 fitted inside the bearing housing 1. A bearing housing 20 for mounting the bearing is formed in the middle of the steel sleeve 2. The steel sleeve 2 includes a cylindrical portion 21. The characteristic is that a plurality of bosses 22 are circumferentially protruding from the top end of the cylindrical portion 21, and a groove 23 is formed between two adjacent bosses 22. The bearing housing 1 is filled in the groove 23 to prevent the steel sleeve 2 from rotating circumferentially.

[0026] Preferably, an annular step 24 is formed by bending inward at the bottom end of the cylindrical portion 21. This provides positioning during the die-casting process and also improves the wear resistance of the steel sleeve 2 during bearing installation, preventing the corrugated washer from scratching the bottom of the bearing housing.

[0027] Preferably, the bearing housing 1 is made of aluminum, and the bearing housing 1 and the steel sleeve 2 are integrated by casting process to avoid creep of the bearing chamber after the motor has been running for a long time.

[0028] Preferably, four protrusions 22 are evenly spaced around the top of the cylindrical part 21, which has a simple structure and uniform force distribution.

[0029] Preferably, the steel sleeve 2 is formed by stamping thin steel to reduce manufacturing costs.

[0030] Example 2:

[0031] like Figure 7 As shown, this embodiment provides an external rotor motor, including a stator assembly, a rotor assembly, and an end cover 100. The end cover 100 includes a base plate 101 and a hollow sleeve portion 102 axially protruding from the middle of the base plate 101. The end of the sleeve portion 102 forms a bearing seat 103. The bearing seat 103 at the end of the sleeve portion 102 adopts a bearing seat structure for preventing bearing chamber creep as described in Embodiment 1. The bearing seat 1 is filled in the groove 23 to prevent the steel sleeve 2 from rotating circumferentially. The steel sleeve 2 is stamped from thin steel, reducing manufacturing costs.

[0032] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited thereto. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model are equivalent substitutions and are included within the protection scope of the present utility model.

Claims

1. A bearing housing structure for preventing bearing housing creep, comprising a bearing housing (1) and a steel sleeve (2) fitted inside the bearing housing (1), wherein a bearing housing (20) for mounting a bearing is formed in the middle of the steel sleeve (2), and the steel sleeve (2) includes a cylindrical portion (21), characterized in that: Several bosses (22) are circumferentially protruding from the top of the cylindrical part (21), and a groove (23) is formed between two adjacent bosses (22). The bearing seat (1) is filled in the groove (23) to prevent the steel sleeve (2) from rotating circumferentially.

2. The bearing housing structure for preventing bearing housing creep according to claim 1, characterized in that: The bottom end of the cylindrical part (21) is bent inward to form an annular step (24).

3. A bearing housing structure for preventing bearing chamber creep according to claim 1 or 2, characterized in that: The bearing housing (1) is made of aluminum, and the bearing housing (1) and the steel sleeve (2) are formed into one piece by casting process.

4. The bearing housing structure for preventing bearing housing creep according to claim 3, characterized in that: Four bosses (22) are evenly spaced around the top of the cylindrical part (21).

5. A bearing housing structure for preventing bearing housing creep according to claim 4, characterized in that: The steel sleeve (2) is formed by stamping thin steel.

6. An external rotor motor, comprising a stator assembly, a rotor assembly, and an end cover (100), said end cover (100) comprising a base plate (101) and a hollow sleeve portion (102) axially protruding from the middle of the base plate (101), the end of the sleeve portion (102) forming a bearing seat (103), characterized in that: The bearing seat (103) at the end of the sleeve portion (102) adopts a bearing seat structure for preventing bearing chamber creep as described in any one of claims 1 to 5.

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