Steel sleeve, end cover and motor

Abstract

The utility model discloses a steel bushing, an end cover and a motor, the steel bushing comprises a steel bushing body, the steel bushing body is provided with an arc outer wall and an anti-rotation outer wall which are connected with each other, the arc outer wall is provided with at least one annular groove, and the anti-rotation outer wall is provided with an anti-rotation surface. The annular groove for preventing the steel sleeve from being separated from the end cover and the anti-rotation surface for preventing the steel sleeve body and the end cover body from generating relative rotation are formed in the circumferential surface of the outer wall of the steel sleeve body, so that the steel sleeve body is effectively clamped on the end cover body. The end cover comprises an end cover body, a center hole is formed in the end cover body, a step groove is formed in the end cover body around the center hole, at least one annular protruding block and at least one rotation stopping face are arranged on the circumferential face of the inner wall of the step groove, and the annular protruding blocks and the rotation stopping faces are arranged in a staggered mode. The annular protruding block used for limiting the annular groove in the novel steel sleeve and the rotation stopping face used for clamping the rotation preventing face in the novel steel sleeve are arranged on the step groove of the end cover body, and therefore the steel sleeve body can be effectively clamped on the end cover body.

Description

Technical Field

[0001] The utility model relates to the technical field of end covers, and particularly relates to a steel sleeve, an end cover and an electric motor. Background Art

[0002] An end cover is a common structure, which is often used to enclose a structure with a certain space inside and acts as a "lid". The shape of the end cover varies according to the situation, and it is generally processed by a production method combining casting and machining. In order to strengthen the strength of the end cover body, the traditional method is to embed a steel sleeve in the end cover. Four small card slots are arranged on the outer side surface of the ordinary steel sleeve, and the steel sleeve is in clamping fit with the end cover through the four small card slots, so as to prevent the steel sleeve from rotating or falling relatively. However, in actual use, relying only on the four small card slots cannot completely ensure that the steel sleeve is tightly clamped to the end cover, and there will still be a phenomenon that the steel sleeve rotates and loosens and falls out relatively, resulting in insufficient strength of the end cover body and affecting the working stability and efficiency of the electric motor. Content of the Utility Model

[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a steel sleeve, an end cover and an electric motor, which can stably clamp the steel sleeve in the end cover, prevent the steel sleeve from rotating and falling relatively, strengthen the strength of the end cover body, and thus improve the working stability and efficiency of the electric motor.

[0004] An embodiment of the utility model provides a steel sleeve, including:

[0005] A steel sleeve body having an arc outer wall and an anti-rotation outer wall connected to each other. At least one annular groove is arranged on the arc outer wall, and two side edges of the annular groove distributed along the axial direction of the steel sleeve body are respectively used as a first limiting edge and a second limiting edge. An anti-rotation surface is arranged on the anti-rotation outer wall, and the anti-rotation surface partially or completely covers the anti-rotation outer wall.

[0006] According to some embodiments of the utility model, the anti-rotation surface is an axial section, and the axial section is parallel to the axis of the annular groove.

[0007] According to some embodiments of the utility model, the steel sleeve further includes a first chamfer, and the first chamfer is arranged at the corner lines at the two transverse ends of the anti-rotation surface.

[0008] According to some embodiments of the utility model, a second chamfer is arranged at the top end of the inner circumferential surface of the steel sleeve body.

[0009] According to some embodiments of the utility model, the cross-sectional shape of the annular groove is any one of a rectangle, a V shape, a trapezoid and an arc.

[0010] On the other hand, an embodiment of the present invention provides an end cover, including an end cover body. The end cover body is provided with a stepped groove, and a central hole is provided in the stepped groove. At least one annular protrusion and at least one anti-rotation surface are provided on the circumferential surface of the inner wall of the stepped groove. The opposite two side edges of the annular protrusion are respectively used as a third limiting edge and a fourth limiting edge.

[0011] According to some embodiments of the present invention, the cross-sectional shape of the annular protrusion is any one of a rectangle, a V shape, a trapezoid, and an arc.

[0012] According to some embodiments of the present invention, the surface of the anti-rotation surface facing the axis of the stepped groove is a plane, and a third chamfer is provided at the corner lines at both transverse ends of the plane.

[0013] According to some embodiments of the present invention, a boss is provided on the end cover body, and a plurality of mounting holes are provided in the boss. The central hole and the stepped hole are both provided in the boss.

[0014] In yet another aspect, an embodiment of the present invention provides a motor, including the above-mentioned steel sleeve and end cover.

[0015] The embodiment of the present invention has at least the following beneficial effects:

[0016] For the steel sleeve provided by the present invention, an annular groove for preventing the steel sleeve from separating from the end cover and an anti-rotation surface for preventing relative rotation between the steel sleeve body and the end cover body are provided on the circumferential surface of the outer wall of the steel sleeve body, effectively clamping the steel sleeve body on the end cover body.

[0017] For the end cover provided by the present invention, an annular protrusion for limiting the annular groove in the steel sleeve and an anti-rotation surface for clamping the anti-rotation surface in the steel sleeve are provided on the stepped groove of the end cover body. Through the cooperation of the annular groove and the annular protrusion, and then through the cooperation of the anti-rotation surface and the anti-rotation surface, the steel sleeve body can be effectively clamped on the end cover body.

[0018] For the motor provided by the present invention, by embedding the steel sleeve in the end cover, the overall strength of the end cover is improved, thereby improving the working stability and efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easy to understand from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0020] Figure 1 is one of the structural schematic diagrams of the steel sleeve according to the embodiment of the present invention;

[0021] Figure 2 is the structural schematic diagram of the end cover according to the embodiment of the present invention;

[0022] Figure 3 Schematic diagram of the steel sleeve embedded in the end cover according to an embodiment of the present utility model;

[0023] Figure 4 is Figure 3 exploded view of the steel sleeve embedded in the end cover shown;

[0024] Figure 5 Second schematic diagram of the steel sleeve according to an embodiment of the present utility model;

[0025] Figure 6 Third schematic diagram of the steel sleeve according to an embodiment of the present utility model;

[0026] Figure 7 Fourth schematic diagram of the steel sleeve according to an embodiment of the present utility model.

[0027] The markings in the figure are explained as follows:

[0028] Steel sleeve body 100, annular groove 110, anti-rotation surface 120, first chamfer 130, second chamfer 140, first limiting edge 150, second limiting edge 160, end cover body 200, central hole 210, stepped groove 220, annular protrusion 230, anti-rotation surface 240, third chamfer 250, boss 260, mounting hole 270, third limiting edge 280, fourth limiting edge 290. Detailed implementation manners

[0029] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0030] In the description of the present utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model.

[0031] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is more than two, understandings such as greater than, less than, exceeding, etc. do not include the base number, and understandings such as "above", "below", "within", etc. include the base number. If there is a description of "first", "second", etc., it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0032] In the description of the present utility model, unless otherwise clearly defined, terms such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0033] Please refer to Figure 1 , the steel sleeve body 100 has an arc outer wall and an anti-rotation outer wall that are connected to each other. At least one annular groove 110 is provided on the arc outer wall. The two side edges of the annular groove 110 distributed along the axial direction of the steel sleeve body 100 are respectively used as the first limiting edge 150 and the second limiting edge 160. An anti-rotation surface 120 is provided on the anti-rotation outer wall, and the anti-rotation surface 120 partially or completely covers the anti-rotation outer wall. The steel sleeve body 100 is applied in the field of end covers. An annular groove 110 is provided at the middle of the circumferential surface of the arc outer wall of the steel sleeve body 100. An anti-rotation surface 120 is provided in the vertical direction of the anti-rotation outer wall of the steel sleeve body 100. The anti-rotation surface 120 is made by means such as cutting, shearing, and punching. The annular groove 110 can prevent the steel sleeve from detaching from the end cover, which is beneficial to preventing the steel sleeve from generating an axial displacement relative to the end cover. In this embodiment, the axial direction is the up and down direction. The anti-rotation surface 120 is beneficial to preventing the steel sleeve from generating a circumferential displacement relative to the end cover, that is, preventing the steel sleeve from generating relative movement on the end cover. Please refer to Figure 3 , after the steel sleeve and the end cover are installed, the steel sleeve is effectively clamped on the end cover to prevent the steel sleeve from rotating or falling relatively; the anti-rotation surface 120 can completely cover the anti-rotation outer wall, and the anti-rotation outer wall can also include the anti-rotation surface 120 and the first chamfers 130 provided at both ends of the anti-rotation surface 120.

[0034] Please refer to Figure 1 , the anti-rotation surface 120 is an axial section, and the axial section is parallel to the axis of the annular groove 110. The axial section is a section in the up and down direction, and the axial section is perpendicular to the top surface and the bottom surface of the steel sleeve body.

[0035] As Figure 1 shown, the steel sleeve further includes first chamfers 130, and the first chamfers 130 are provided at the corner lines at the transverse two ends of the anti-rotation surface 120. The first chamfers 130 are in the structure of rounded corners, which can make the steel sleeve body 100 look smoother and more beautiful, eliminate the sharp corner lines, and are beneficial to preventing bump damage.

[0036] As Figure 1 shown, a second chamfer 140 is provided at the top of the inner circumferential surface of the steel sleeve body 100. The second chamfer 140 is a characteristic structure that cooperates with the motor output shaft and is determined according to the specific motor structure.

[0037] As Figure 1 , Figure 5 , Figure 6 and Figure 7 shown, the cross-sectional shape of the annular groove 110 is any one of a rectangle (as Figure 1 shown), a V shape (as Figure 5 shown), a trapezoid (as Figure 6 shown), and an arc (as Figure 7 shown). In this embodiment, the cross-sectional shape of the annular groove 110 is a rectangle. Under different models or manufacturing requirements, it can also be other geometric shapes. If the annular groove 110 is any one of a V shape, a trapezoid, and an arc, the beneficial effect is to increase the contact area, thereby increasing the friction area, so that the friction force between the two increases, thus achieving a better clamping function.

[0038] Please refer to Figure 2 , this embodiment also provides an end cover, including an end cover body 200. The end cover body 200 is provided with a central hole 210. The end cover body 200 is provided with a stepped groove 220 around the central hole 210. An annular protrusion 230 and a rotation prevention surface 240 are provided on the circumferential surface of the inner wall of the stepped groove 220. The two side edges of the annular protrusion 230 distributed along the axial direction of the stepped groove 220 are respectively used as a third limiting edge 280 and a fourth limiting edge 290. By abutting the third limiting edge 280 against the first limiting edge 150, and then abutting the fourth limiting edge 290 against the second limiting edge 160, the annular protrusion 230 is embedded in the annular groove 110, and the rotation prevention surface 240 is embedded in the anti-rotation surface 120, so that the steel sleeve is embedded in the end cover; the end cover body 200 embedded with the steel sleeve body 100 is applied in the field of motors. The end cover body 200 and the steel sleeve are in a mutually cooperative relationship. The motor output shaft passes through the central hole 210, and the steel sleeve is embedded in the stepped groove 220. Please refer to Figure 3 , by providing an annular protrusion 230 for limiting the annular groove 110 in the steel sleeve and a rotation prevention surface 240 for clamping the anti-rotation surface 120 in the stepped groove 220 of the end cover body 200, the steel sleeve body 100 can be effectively clamped on the end cover body 200. The rotation prevention surface 240, the annular protrusion 230, and the end cover body 200 are all integrated structures.

[0039] Please refer to Figure 2, the cross-sectional shape of the annular bump 230 is any one of a rectangle, a V-shape, a trapezoid, and an arc. The cross-sectional shape of the annular bump 230 is designed to match and define the cross-sectional shape of the annular groove 110. The cross-sectional shape of the annular bump 230 is any one of a rectangle, a V-shape, a trapezoid, and an arc. In this embodiment, the cross-sectional shape of the annular bump 230 is a rectangle. Under different models or manufacturing requirements, it can also be other geometric shapes.

[0040] Please refer to Figure 2 , one side of the anti-rotation surface 240 facing the axis of the step groove 220 is a plane, and third chamfers 250 are provided at the corner lines at both transverse ends of the plane. Please refer to Figure 3 , the plane of the anti-rotation surface 240 and the tangent plane of the anti-rotation surface 120 are mutually adapted, and the third chamfer 250 can be mutually adapted with the first chamfer 130, enabling better clamping.

[0041] Please refer to Figure 2 , a boss 260 is provided on the end cap body 200, and a plurality of mounting holes 270 are provided on the boss 260. The central hole 210 and the step hole 220 are both provided on the boss 260. The mounting holes 270 facilitate the installation of the end cap body 200 by means of screws.

[0042] Please refer to Figure 3 and Figure 4 , this embodiment also provides a motor, including a steel sleeve and an end cap. By abutting the third limiting edge 280 against the first limiting edge 150, and then abutting the fourth limiting edge 290 against the second limiting edge 160, the annular bump 230 is embedded in the annular groove 110, and the anti-rotation surface 240 is embedded in the anti-rotation surface 120, so that the steel sleeve is embedded in the end cap.

[0043] The usage process of the motor provided by the present utility model is as follows:

[0044] First, embed the annular groove 110 in the steel sleeve on the annular bump 230 of the end cap, and abut the anti-rotation surface 120 in the steel sleeve against the anti-rotation surface 240 of the end cap to prevent the anti-rotation angle 120 of relative rotation between the steel sleeve body 100 and the end cap body 200, thereby improving the overall strength of the end cap and thus enhancing the working stability and efficiency of the motor.

[0045] The above has described the embodiments of the present utility model in detail with reference to the drawings. However, the present utility model is not limited to the above embodiments. Various changes can be made without departing from the gist of the present utility model within the knowledge scope of those of ordinary skill in the art.

Claims

1. A steel sleeve, characterized in that, Comprising: A steel sleeve body (100) having an arc outer wall and an anti-rotation outer wall connected to each other. At least one annular groove (110) is provided on the arc outer wall. The two side edges of the annular groove (110) distributed along the axial direction of the steel sleeve body (100) are respectively used as a first limiting edge (150) and a second limiting edge (160). An anti-rotation surface (120) is provided on the anti-rotation outer wall, and the anti-rotation surface (120) partially or completely covers the anti-rotation outer wall.

2. The steel sleeve according to claim 1, characterized in that, The anti-rotation surface (120) is an axial section, and the axial section is parallel to the axis of the annular groove (110).

3. The steel sleeve according to claim 1 or 2, characterized in that, The steel sleeve further includes a first chamfer (130), and the first chamfer (130) is provided at the corner lines at the transverse two ends of the anti-rotation surface (120).

4. The steel sleeve according to claim 3, characterized in that, A second chamfer (140) is provided at the top of the inner circumferential surface of the steel sleeve body (100).

5. The steel sleeve according to claim 1, characterized in that, The cross-sectional shape of the annular groove (110) is any one of a rectangle, a V shape, a trapezoid, and an arc.

6. A end cap, comprising an end cap body (200), wherein a central hole (210) is formed in the end cap body (200), and is characterized in that, The end cover body (200) is provided with a step groove (220) around the central hole (210). At least one annular protrusion (230) and at least one anti-rotation surface (240) are provided on the circumferential surface of the inner wall of the step groove (220). The two side edges of the annular protrusion (230) distributed along the axial direction of the step groove (220) are respectively used as a third limiting edge (280) and a fourth limiting edge (290).

7. The end cap according to claim 6, characterized in that, The cross-sectional shape of the annular protrusion (230) is any one of a rectangle, a V shape, a trapezoid, and an arc.

8. The end cap according to claim 6, wherein, The surface of the anti-rotation surface (240) facing the axis of the step groove (220) is a plane, and a third chamfer (250) is provided at the corner lines at the transverse two ends of the plane.

9. The end cap according to any one of claims 6 - 8, characterized in that, A boss (260) is provided on the end cover body (200), and a plurality of mounting holes (270) are provided on the boss (260). The central hole (210) and the step groove (220) are both provided on the boss (260).

10. A motor, characterized in that, Comprising a steel sleeve according to any one of claims 1-5 and an end cover according to any one of claims 6-9.

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