Bearing fixing sleeve, motor end cover and motor

Abstract

The utility model discloses a bearing fixing sleeve, a motor end cover and a motor. A bearing fixing sleeve comprises a bearing sleeve and one or more exhaust grooves formed in the outer surface of the bearing sleeve. According to the bearing fixing sleeve provided by the utility model, one or more exhaust grooves are formed in the outer surface of the bearing sleeve, if the exhaust grooves are not formed, when a bearing, the bearing fixing sleeve and an end cover are assembled in a close-fitting manner and are forcibly assembled and pressed downwards, the bottom air pressure is increased and the bearing fixing sleeve is deformed due to extrusion of the bearing fixing sleeve and an inner hole of the end cover; and the assembly process is risky. By additionally arranging the exhaust groove, air pressure formed at the bottom during assembly is exhausted, and the situation that the bearing fixing sleeve deforms due to the fact that internal air pressure is too large in the assembly process is avoided. According to the utility model, the bearing fixing sleeve is arranged between the motor end cover and the bearing during assembly, so that the resonance and friction sound during the operation of the bearing can be reduced, the noise of the motor is solved, and the risk of deformation of the bearing fixing sleeve during assembly is also solved through the exhaust groove.

Description

Technical Field

[0001] The utility model relates to the technical field of stepping motors, in particular to a bearing fixing sleeve, a motor end cover and a motor. Background Art

[0002] At present, in the industry, when assembling the bearing in the motor end cover, most designs are that the bearing and the metal end cover are directly matched with each other. When the motor is running, the outer ring of the bearing will rotate with the bearing hole of the end cover to produce friction noise, or the vibration of the rotor will be transmitted to the casing through the bearing to produce abnormal noise. Utility Model Content

[0003] Based on this, it is necessary to provide a bearing fixing sleeve to address the above technical problems, which can solve the motor noise while also solving the risk of deformation of the bearing fixing sleeve during assembly.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] In a first aspect, a bearing fixing sleeve includes a bearing sleeve and one or more exhaust grooves arranged on an outer surface of the bearing sleeve.

[0006] As a preferred implementation of a bearing fixing sleeve provided by the utility model, the bearing sleeve is made of rubber or plastic.

[0007] As a preferred implementation of a bearing fixing sleeve provided by the utility model, the bearing sleeve includes an annular body and an inner flange located at one end of the annular body.

[0008] As a preferred implementation of a bearing fixing sleeve provided by the utility model, the exhaust groove extends from an edge of one end of the annular body to an edge of the inner flange.

[0009] As a preferred implementation of a bearing fixing sleeve provided by the utility model, one side of the exhaust groove penetrates through the edge of the annular body, and the other side penetrates through the edge of the inner flange.

[0010] As a preferred implementation of a bearing fixing sleeve provided by the utility model, the cross section of the exhaust groove is polygonal, U-shaped, C-shaped, semicircular, semi-elliptical or triangular.

[0011] As a preferred implementation of a bearing fixing sleeve provided by the utility model, the polygon is a rectangle, a square or a trapezoid.

[0012] As a preferred embodiment of a bearing fixing sleeve provided by the utility model, the multiple exhaust grooves are 2, 3, 4 or 5 exhaust grooves evenly arranged along the circumference of the bearing sleeve.

[0013] The second invention is a motor end cover, which includes an end cover, a bearing and any of the above-mentioned bearing fixing sleeves, wherein the bearing is tightly fitted inside the bearing fixing sleeve; the bearing fixing sleeve is tightly fitted on the end cover, and the exhaust groove on the bearing fixing sleeve is used to discharge the air pressure formed at the bottom during the tight fit.

[0014] In a third aspect, a motor comprises the above-mentioned bearing fixing sleeve or the above-mentioned motor end cover.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The bearing fixing sleeve provided by the utility model has one or more exhaust grooves on the outer surface of the bearing sleeve. If the exhaust grooves are not provided, when the bearing, the bearing fixing sleeve and the end cover are tightly assembled and forced to be assembled and pressed down, the air pressure at the bottom increases due to the squeezing between the bearing fixing sleeve and the inner hole of the end cover, and the bearing fixing sleeve is deformed, which poses a risk to the assembly process. The utility model adds exhaust grooves to discharge the air pressure formed at the bottom during assembly, thereby avoiding excessive internal air pressure during the assembly process, which may cause deformation of the bearing fixing sleeve. The utility model uses the bearing fixing sleeve to be located between the motor end cover and the bearing during assembly, which can reduce the resonance and friction noise of the bearing during operation, solve the motor noise, and solve the risk of deformation of the bearing fixing sleeve during assembly through the exhaust grooves. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A three-dimensional schematic diagram of the overall structure of the bearing fixing sleeve provided by the utility model;

[0019] Figure 2 A front view schematic diagram of the overall structure of the bearing fixing sleeve provided by the utility model;

[0020] Figure 3 for Figure 2 A sectional stereogram at AA in the middle;

[0021] Figure 4 A schematic diagram of the structure of the motor end cover provided by the utility model;

[0022] Figure 5 A front schematic diagram of the motor end cover provided by the utility model;

[0023] Figure 6 for Figure 5 Schematic diagram of the cross section at BB in the middle.

[0024] The markings in the figure are as follows:

[0025] 1. Bearing fixing sleeve, 11. Bearing sleeve, 111. Ring-shaped body, 112. Inner flange; 12. Exhaust groove, 121. Middle hole

[0026] 2. Bearings

[0027] 3. End cap DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0029] As described in the background technology above, in the current industry, when assembling the bearing in the motor end cover, most designs are that the bearing and the metal end cover are directly clearance-matched. When the motor is running, the outer ring of the bearing will rotate with the bearing hole of the end cover to produce friction noise or the rotor vibration will be transmitted to the casing through the bearing to produce abnormal noise.

[0030] In order to reduce noise, a bearing fixing sleeve can be added between the bearing and the motor end cover, that is, the bearing is tightly fitted with the inner ring of the bearing fixing sleeve, and then the bearing fixing sleeve is tightly fitted with the end cover. However, the inventors found that there is no vent hole on the bearing fixing sleeve. When the bearing sleeve and the inner hole of the end cover are forced to be assembled and pressed down, the bottom air pressure increases due to squeezing, the bearing fixing sleeve is deformed, and the assembly process is risky. In order to further avoid the risk of deformation of the bearing fixing sleeve during assembly, the utility model proposes a new type of bearing fixing sleeve.

[0031] Specifically, Figure 1-3 A bearing fixing sleeve 1 is shown, which comprises a bearing sleeve 11 and one or more exhaust grooves 12 provided on the outer surface of the bearing sleeve 11. The bearing fixing sleeve 1 not only solves the motor noise, but also solves the risk of deformation of the bearing fixing sleeve 1 during assembly.

[0032] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0033] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] Embodiment 1 Bearing fixing sleeve 1

[0036] Please refer to Figure 1-3 , this embodiment shows a bearing fixing sleeve 1. The bearing fixing sleeve 1 includes a bearing sleeve 11 and an exhaust groove 12 on the outer surface of the bearing sleeve 11. If the exhaust groove 12 is not provided, when the bearing 2, the bearing fixing sleeve 1 and the end cover 3 are tightly fitted and assembled, when the assembly is forced downward, the air pressure at the bottom of the bearing fixing sleeve 1 and the inner hole of the end cover 3 increases due to squeezing, and the bearing fixing sleeve 1 is deformed, which poses a risk in the assembly process. The utility model adds an exhaust groove 12 to discharge the air pressure formed at the bottom during assembly, thereby avoiding excessive internal air pressure during the assembly process, which causes deformation of the bearing fixing sleeve 1. The utility model uses the bearing fixing sleeve 1 to be located between the motor end cover 3 and the bearing 2 during assembly, thereby reducing the resonance and friction noise of the bearing 2 during operation, solving the problem of motor noise, and also solving the risk of deformation of the bearing fixing sleeve 1 during assembly through the exhaust groove 12.

[0037] The bearing sleeve 11 is made of rubber or plastic. The bearing fixing sleeve 1 of this material is assembled between the bearing 2 and the end cover 3 to reduce the resonance and friction noise of the bearing 2 during operation, and solve the mechanical noise and abnormal noise problems during the operation of the motor.

[0038] Specifically, the bearing sleeve 11 includes an annular body 111 and an inner flange 112 located at one end of the annular body 111. It can be understood that the inner flange 112 is formed by extending inwardly along the radial direction at one end edge of the annular body 111 in the axial direction, and the inner flange 112 has a central hole 121 for the shaft to pass through. The inner flange 112 forms a bearing platform relative to the annular body 111, which can be used to position the bearing 2 and support the bearing 2 during assembly.

[0039] The exhaust groove 12 extends from the edge of one end of the annular body 111 to the edge of the inner flange 112. It can be understood that one side of the exhaust groove 12 penetrates to the edge of the annular body 111, and the other side penetrates to the edge of the inner flange 112, that is, when the outer side of the bearing sleeve 11 is squeezed, the exhaust groove 12 is connected to the outside, and the internal pressure can be discharged immediately to avoid deformation of the bearing sleeve 11 caused by force squeezing.

[0040] Among them, the groove cross-section of the exhaust groove 12 is a polygon such as a rectangle, square or trapezoid, U-shape, C-shape, semicircle, semi-ellipse or triangle. It is worth noting that the shape of the groove cross-section is not limited to this, as long as it can discharge the internal pressure.

[0041] The number of the exhaust grooves 12 can be one or more, and can be designed according to actual needs. The multiple exhaust grooves 12 are 2, 3, 4 or 5 exhaust grooves 12 evenly arranged along the circumference of the bearing sleeve 11, or more exhaust grooves 12 can be provided.

[0042] Example 2 Motor end cover 3

[0043] Please refer to Figure 4-6 This embodiment shows a motor end cover, which includes an end cover 3, a bearing 2 and a bearing fixing sleeve 1 as shown in Example 1, wherein the bearing 2 is tightly fitted on the inner side of the bearing fixing sleeve 1; the bearing fixing sleeve 1 is tightly fitted on the end cover 3, and the exhaust groove 12 on the bearing fixing sleeve 1 is used to discharge the air pressure formed at the bottom during the tight fit.

[0044] The end cover 3 can be a front cover of the motor or a rear cover of the motor.

[0045] Example 3 Motor

[0046] This embodiment shows a motor, which includes the bearing fixing sleeve 1 shown in Embodiment 1 or the motor end cover shown in Embodiment 2.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A bearing fixing sleeve, characterized in that: The utility model comprises a bearing sleeve and one or more exhaust grooves arranged on the outer surface of the bearing sleeve.

2. A bearing fixing sleeve according to claim 1, characterized in that: The bearing sleeve is made of rubber or plastic.

3. A bearing fixing sleeve according to claim 1, characterized in that: The bearing sleeve comprises an annular body and an inner flange located at one end of the annular body.

4. A bearing fixing sleeve according to claim 3, characterized in that: The exhaust groove extends from an edge of one end of the annular body to an edge of the inner flange.

5. A bearing fixing sleeve according to claim 4, characterized in that: One side of the exhaust groove penetrates to the edge of the annular body, and the other side penetrates to the edge of the inner flange.

6. A bearing fixing sleeve according to any one of claims 1 to 5, characterized in that: The cross section of the exhaust groove is polygonal, U-shaped, C-shaped, semicircular, semi-elliptical or triangular.

7. A bearing fixing sleeve according to claim 6, characterized in that: The polygon is a rectangle, a square or a trapezoid.

8. The bearing fixing sleeve according to claim 1, characterized in that: The plurality of exhaust grooves are 2, 3, 4 or 5 exhaust grooves evenly arranged along the circumference of the bearing sleeve.

9. A motor end cover, characterized in that: It includes an end cover, a bearing and a bearing fixing sleeve as described in any one of claims 1 to 8, wherein the bearing is tightly fitted inside the bearing fixing sleeve; the bearing fixing sleeve is tightly fitted on the end cover, and the exhaust groove on the bearing fixing sleeve is used to discharge the air pressure formed at the bottom during the tight fit.

10. A motor, characterized in that: It comprises the bearing fixing sleeve as described in any one of claims 1 to 8 or the motor end cover as described in claim 9.

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