Motor

Abstract

The embodiment of the utility model provides a motor. The motor comprises a metal bus bar and a resin carrying part carrying the metal bus bar, the metal bus bar is pressed into the resin carrying part, the metal bus bar comprises a press-in end, and the resin carrying part comprises a press-in hole. A press-in structure formed by the inner wall of the press-in hole and the two sides of the press-in end in the width direction is asymmetric relative to the center line of the press-in hole. According to the embodiment of the invention, when the metal bus bar is pressed into the resin carrying part, the situation that the resin carrying part on the side with larger stress is broken due to non-uniform stress on the two sides of the press-in end can be prevented, and the rate of finished products is improved.

Description

Technical Field

[0001] The present application relates to the field of electromechanics, and in particular to a motor. Background Art

[0002] Conventional brush motors are usually equipped with a brush plate, and sometimes a bus bar for electrical connection needs to be pressed into the resin brush plate. In order to reliably press the bus bar into the resin brush plate, the bus bar usually has a press-in end, and the press-in end has press-in teeth. Moreover, the press-in teeth on both sides of the press-in end in the width direction are usually arranged symmetrically, and the press-in teeth are also arranged symmetrically with respect to the center of the press-in hole of the brush plate.

[0003] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present application. Utility Model Content

[0004] The inventors found that for the motor with the above structure, since the pressing jig is concentrated on one side of the pressing end, when the pressing end is pressed into the resin brush disc, the pressing force on one side of the pressing end and the resin brush disc is relatively large, causing the resin brush disc on this side to easily crack.

[0005] In order to solve at least one of the above problems or other similar problems, an embodiment of the present application provides a motor.

[0006] According to one aspect of an embodiment of the present application, a motor is provided, the motor comprising: a metal bus bar and a resin mounting part mounting the metal bus bar, the metal bus bar is pressed into the resin mounting part, the metal bus bar has a press-in end, the resin mounting part has a press-in hole, and the press-in structure composed of the inner wall of the press-in hole and the two sides of the press-in end in the width direction is asymmetric relative to the center line of the press-in hole. Thus, when the bus bar component is pressed in, uneven force on both sides of the press-in end can be prevented, resulting in the resin mounting part on the side with greater force being ruptured.

[0007] In some embodiments, the two sides of the press-in end in the width direction are provided with press-in teeth, and the press-in teeth on both sides and the inner wall of the press-in hole form the press-in structure, and the press-in structure is asymmetric with respect to the center line of the press-in hole. Thus, by making the press-in teeth and the press-in hole cooperate asymmetric, the forces on both sides of the press-in end can be balanced.

[0008] In some embodiments, the metal bus bar further includes a main body, the main body is exposed on a surface of one axial side of the resin mounting portion, connected to the press-in end, and the main body is located in the press-in teeth on both sides in the width direction of the press-in end, on the side with a lower degree of fit with the inner wall of the press-in hole. Thus, the formation and press-in of the metal bus bar are facilitated.

[0009] In some embodiments, the pressing teeth on both sides of the pressing end in the width direction are asymmetric with respect to the center line of the pressing end in the width direction, and the center line of the pressing end in the width direction coincides with the center line of the pressing hole. Thus, the asymmetric structure of the pressing teeth can balance the forces on both sides of the pressing end.

[0010] In some embodiments, of the pressing teeth on both sides of the pressing end in the width direction, the pressing teeth on one side are longer in the width direction of the pressing teeth than the pressing teeth on the other side. Thus, by changing the size of the pressing teeth in the width direction, the forces on both sides of the pressing end can be balanced.

[0011] In some embodiments, the main body is located in the press-in teeth on both sides of the press-in end in the width direction, and the press-in teeth are on the shorter side in the width direction. Thus, the busbar can be reliably pressed in when the size of the resin mounting part is limited.

[0012] In some embodiments, the pressing teeth on both sides of the pressing end in the width direction are longer on one side than on the other side in the length direction of the pressing teeth. Thus, by changing the size of the pressing teeth in the length direction, the forces on both sides of the pressing end can be balanced.

[0013] In some embodiments, the main body is located in the press-in teeth on both sides of the press-in end in the width direction, and the press-in teeth are on the shorter side in the length direction. Thus, the busbar can be reliably pressed in when the size of the resin mounting part is limited.

[0014] In some embodiments, the pressing teeth on both sides of the pressing end in the width direction are symmetrical with respect to the center line of the pressing end in the width direction, and the center line of the pressing end in the width direction is misaligned with the center line of the pressing hole. Thus, by changing the pressing position of the pressing teeth, the forces on both sides of the pressing end can be balanced.

[0015] In some embodiments, the main body is located in the press-in holes on both sides of the press-in end in the width direction, on the side farther from the inner wall of the press-in hole. Thus, the busbar can be reliably pressed in when the size of the resin mounting part is limited.

[0016] In some embodiments, the resin mounting portion is a resin brush plate, so that even a brush plate with a relatively thin resin thickness can be reliably pressed into the metal bus bar.

[0017] One of the beneficial effects of the embodiment of the present application is that, by making the press-in structure composed of the inner wall of the press-in hole and the two sides in the width direction of the press-in end asymmetric relative to the center line of the press-in hole, the press-in fit between the press-in teeth on the side of the press-in end closer to the press-in jig and the resin brush disc is shallower, and the press-in fit between the press-in teeth on the side of the press-in end farther from the press-in jig and the resin brush disc is deeper. Thus, it can be avoided that when the press-in jig is concentrated on one side of the press-in end, the resin brush disc is not crushed on that side.

[0018] With reference to the following description and accompanying drawings, the embodiments of the present application are disclosed in detail. It should be understood that the embodiments of the present application are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present application include many changes, modifications and equivalents.

[0019] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0020] It should be emphasized that the terms “include / comprises / has” when used herein refer to the existence of a feature, an integer, or a component, but do not exclude the existence or addition of one or more other features, integers, or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other objects, features and advantages of the embodiments of the present application will become more apparent from the following detailed description in conjunction with the accompanying drawings, in which:

[0022] Figure 1 is a schematic diagram of a motor according to an embodiment of the present application;

[0023] Figure 2 is a cross-sectional view of a resin mounting portion and a metal bus bar of a motor according to an embodiment of the present application;

[0024] Figure 3 is a side view of a resin mounting portion and a metal bus bar of a motor according to an embodiment of the present application;

[0025] Figure 4 is another side view of the resin mounting portion and the metal bus bar of the motor of the embodiment of the present application;

[0026] Figure 5 is an axial cross-sectional view of the press-in structure of the embodiment of the present application;

[0027] Figure 6is another axial cross-sectional view of the press-in structure of an embodiment of the present application;

[0028] Figure 7 It is another axial cross-sectional view of the press-in structure of the embodiment of the present application. DETAILED DESCRIPTION

[0029] With reference to the accompanying drawings, the above and other features of the present application will become apparent through the following description. In the description and the accompanying drawings, specific embodiments of the present application are specifically disclosed, which show some embodiments in which the principles of the present application can be adopted, and it should be understood that the present application is not limited to the described embodiments, but includes all modifications and equivalents falling within the scope of the attached claims.

[0030] In the embodiments of the present application, the terms "first", "second", "upper", "lower", etc. are used to distinguish different elements in terms of title, but do not indicate the spatial arrangement or time order of these elements, etc., and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0031] In the embodiments of the present application, the singular forms "a", "the", etc. include plural forms and should be broadly understood as "a kind" or "a type" rather than being limited to the meaning of "one"; in addition, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least in part according to...", and the term "based on" should be understood as "at least in part based on...", unless the context clearly indicates otherwise.

[0032] In addition, in the following description of the embodiments of the present application, for the convenience of explanation, the direction extending along the central axis of the motor or the direction parallel to it is referred to as "axial", the radial direction centered on the central axis is referred to as "radial", the direction around the central axis is referred to as "circumferential", the side away from the central axis along the radial direction is referred to as "radial outer side", the side close to the central axis along the radial direction is referred to as "radial inner side", the direction from the bottom of the motor casing to the casing opening of the motor along the axial direction is referred to as "the other axial side" or "axial lower side" or "lower side" or "lower side", and the direction from the casing opening of the motor to the bottom of the motor casing along the axial direction is referred to as "one axial side" or "axial upper side" or "upper side" or "above". However, it is worth noting that these are only for the convenience of explanation and do not limit the orientation of the motor during use and manufacturing.

[0033] The embodiments of the present application are described below with reference to the accompanying drawings.

[0034] The present application embodiment provides a motor, Figure 1 is a schematic diagram of a motor according to an embodiment of the present application. Figure 1 As shown, the motor 10 includes a resin mounting portion 20 and a metal bus bar 30 ( Figure 1 not shown). Figure 2 is a top view of the resin mounting portion and the metal bus bar of the motor of the embodiment of the present application, Figure 3 is a side view of a resin mounting portion and a metal bus bar of a motor according to an embodiment of the present application, showing a state where the resin mounting portion is viewed from one axial side; Figure 4 This is another side view of the resin mounting portion and the metal bus bar of the motor according to the embodiment of the present application, showing the resin mounting portion as viewed from the other axial side.

[0035] like Figures 2 to 4 As shown, in the embodiment of the present application, the resin mounting portion 20 has a press-in hole 21, the metal bus bar 30 has a press-in end 31, and the inner wall of the press-in hole 21 and both sides of the press-in end 31 in the width direction constitute press-in structures S1 and S2.

[0036] Figure 5 is an axial schematic diagram of the press-in structure of the embodiment of the present application, such as Figure 5 As shown, in the embodiment of the present application, the press-in structures S1 and S2 are asymmetric relative to the center line 23 of the press-in hole 21 .

[0037] This can prevent the resin mounting portion on the side receiving a larger force from being broken due to uneven force on both sides of the press-in end when the metal bus bar is press-in.

[0038] In some embodiments, Figure 5 As shown, the two sides of the press-in end 31 in the width direction have press-in teeth 32 respectively, and the press-in hole 21 has an inner wall 22. The inner wall 22 of the press-in hole and the two sides of the press-in end 31 in the width direction constitute press-in structures S1 and S2, and the press-in structures S1 and S2 are asymmetric relative to the center line 23 of the press-in hole 21.

[0039] Therefore, by making the fit between the press-in teeth and the press-in holes asymmetrical, the forces on both sides of the press-in end can be balanced.

[0040] In the embodiment of the present application, the shape of the press-in end 31 is a sheet as an example, but the present application is not limited to this. The press-in end 31 can be other shapes, such as a columnar shape, or a partial sheet shape, etc. It can be understood that the press-in structure formed by the press-in end 31 and the inner wall 22 of the press-in hole 21 is asymmetric relative to the center line of the press-in hole 21.

[0041] In some embodiments, Figure 5As shown, the metal bus bar 30 further includes a main body portion 33, and the main body portion 33 is exposed on one axial side of the resin mounting portion 20 ( Figure 5 The surface of the lower side shown) (on Figure 5 The structure is not shown in the figure), and is connected to the press-in end 31.

[0042] In the above embodiment, the main body 33 is located in the pressing teeth 32 on both sides of the pressing end 31 in the width direction, and the side with a lower degree of fit with the inner wall 22 of the pressing hole 21. The lower degree of fit means: the distance between the pressing teeth and the inner wall is farther, the number of pressing teeth is smaller, the width of the pressing teeth is smaller, the length of the pressing teeth is shorter, etc. In addition, the main body 33 and the pressing end 31 are integrally formed.

[0043] This facilitates the formation and press-fitting of the metal bus bar 30 .

[0044] In some embodiments, Figure 5 As shown, the pressing teeth 32 on both sides of the pressing end 31 in the width direction are asymmetric with respect to the center line 34 in the width direction of the pressing end 31, that is, Figure 5 In the figure, the circled parts S1 and S2 are asymmetric, and the center line 34 in the width direction of the press-in end 31 coincides with the center line 23 of the press-in hole 21. Thus, the asymmetric structure of the press-in teeth can balance the forces on both sides of the press-in end.

[0045] Figure 6 is an axial schematic diagram of the press-in structure of an embodiment of the present application, Figure 7 It is another axial schematic diagram of the press-in structure of the embodiment of the present application.

[0046] In some embodiments, Figure 6 As shown, among the press-in teeth 32 on both sides in the width direction of the press-in end 31, the press-in teeth 32 on one side ( Figure 6 The right side shown) is relative to the pressed-in tooth 32 ( Figure 6 The left side shown) is in the width direction of the pressed-in tooth 32 ( Figure 6 Thus, by changing the length of the press-in teeth in the width direction, the forces on both sides of the press-in end can be balanced.

[0047] In the above embodiment, if Figure 6 As shown, the main body 33 may be located on the shorter side of the pressing teeth 32 of the pressing end 31 in the width direction, that is, Figure 6 As a result, even when the size of the resin mounting portion is limited, the metal bus bar can be reliably pressed in.

[0048] In some embodiments, Figure 6As shown, it is also possible to make the pressing teeth 32 on both sides of the pressing end 31 in the width direction such that the pressing teeth 32 on one side are relatively closer to the pressing teeth 32 on the other side in the length direction of the pressing teeth 32 ( Figure 6 Therefore, by changing the length of the pressing tooth in the length direction, the forces on both sides of the pressing end can be balanced.

[0049] In the above embodiment, the main body 33 may be located on the shorter side of the press-in teeth 32 of the press-in end 31. Thus, even when the size of the resin mounting portion is limited, the metal bus bar can be reliably press-in.

[0050] In some embodiments, Figure 7 As shown, the press-in teeth 32 on both sides of the press-in end 31 in the width direction are symmetrical with respect to the center line 34 in the width direction of the press-in end 31, and the center line 34 in the width direction of the press-in end 31 is offset from the center line 23 of the press-in hole 21. That is, the press-in teeth 32 on both sides of the press-in end 31 are symmetrical, but the press-in end 31 is biased to one side relative to the center of the press-in hole 21 of the resin mounting portion 20, for example, closer to Figure 7 The inner wall 22 is shown on the right side.

[0051] Therefore, the forces on both sides of the pressing end are balanced by changing the pressing position of the pressing tooth.

[0052] In the above embodiment, if Figure 7 As shown, the main body 33 can be located on the side of the pressing teeth 32 on both sides of the pressing end 31 that is farther from the inner wall 22 of the pressing hole 21, that is, the side closer to the center line 23 of the pressing hole 21 ( Figure 7 left side shown).

[0053] Thus, even when the size of the resin mounting portion is limited, the metal bus bar can be reliably press-fitted.

[0054] In the aforementioned embodiments, the resin mounting portion 20 is taken as a resin brush plate. In other embodiments, the resin mounting portion 20 may also be other components that carry metal bus bars, such as a bus bar holder used in a brushless motor.

[0055] It is worth noting that the above only describes the structure of the motor related to the present application, and the motor may also include other structures, for example, Figure 1 As shown, the motor 10 may further include a rotating shaft 40, a stator and bearings arranged around the rotating shaft 40, etc. For details, please refer to the relevant technology and the description is omitted here.

[0056] It can be seen from the above embodiments that the press-in structure composed of the inner wall of the press-in hole of the motor and the two sides of the press-in end in the width direction is asymmetrical relative to the center line of the press-in hole. For example, the press-in teeth on both sides of the press-in end of the metal busbar are set to be asymmetrical, and the press-in teeth are smaller on the side where the press-in jig is concentrated; or the press-in teeth on both sides of the press-in end are symmetrical, but the press-in end is biased to one side relative to the center of the press-in hole of the resin mounting part. The press-in fit between the press-in teeth on the side of the press-in end closer to the press-in jig and the resin mounting part is shallow, and the press-in teeth on the side of the press-in end farther from the press-in jig and the resin mounting part is deeper. In this way, when the press-in jig is concentrated on one side of the press-in end, the resin mounting part can be prevented from being crushed on that side.

[0057] The embodiments of the present application are described in detail with reference to the accompanying drawings, indicating the manner in which the principles of the present application can be adopted. However, it should be understood that the implementation of the present application is not limited to the manner of the above embodiments, and also includes all changes, modifications and equivalents that do not depart from the scope of the subject matter of the present application.

Claims

1. A motor comprising a metal bus bar and a resin mounting portion on which the metal bus bar is mounted, wherein the metal bus bar is pressed into the resin mounting portion, The metal bus bar has a press-fit end, The resin mounting portion has a press-in hole, It is characterized in that The press-in structure formed by the inner wall of the press-in hole and the two sides of the press-in end in the width direction is asymmetric relative to the center line of the press-in hole.

2. The motor according to claim 1, characterized in that The press-in end has press-in teeth on both sides in the width direction, and the press-in teeth on both sides and the inner wall of the press-in hole form the press-in structure, and the press-in structure is asymmetric relative to the center line of the press-in hole.

3. The motor according to claim 2, characterized in that The metal bus bar also includes a main body portion, which is exposed on the surface of one axial side of the resin mounting portion and is connected to the press-in end. The main body portion is located in the press-in teeth on both sides in the width direction of the press-in end, and the side with a lower degree of fit with the inner wall of the press-in hole.

4. The motor according to claim 3, characterized in that The press-in teeth on both sides of the press-in end in the width direction are asymmetric with respect to a center line of the press-in end in the width direction, and the center line of the press-in end in the width direction coincides with a center line of the press-in hole.

5. The motor according to claim 4, characterized in that Of the press-in teeth on both sides in the width direction of the press-in end, the press-in teeth on one side are longer in the width direction of the press-in teeth than the press-in teeth on the other side.

6. The motor according to claim 5, characterized in that The main body is located between the press-in teeth on both sides of the press-in end in the width direction, and the press-in teeth are located on the shorter side in the width direction.

7. The motor according to claim 4, characterized in that Of the press-in teeth on both sides in the width direction of the press-in end, the press-in teeth on one side are longer in the length direction of the press-in teeth than the press-in teeth on the other side.

8. The motor according to claim 7, characterized in that The main body is located between the press-in teeth on both sides of the press-in end in the width direction, and the press-in teeth are located on the shorter side in the length direction.

9. The motor according to claim 3, characterized in that The press-in teeth on both sides of the press-in end in the width direction are symmetrical with respect to a center line in the width direction of the press-in end, and the center line in the width direction of the press-in end is offset from a center line of the press-in hole.

10. The motor according to claim 9, characterized in that The main body is located on the side of the press-in teeth on both sides in the width direction of the press-in end that is farther from the inner wall of the press-in hole.

11. The motor according to any one of claims 1 to 10, characterized in that: The resin mounting portion is a resin brush plate.

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