Motor shell, motor and vehicle

Abstract

The utility model provides a shell of a motor and a motor vehicle. The shell comprises a body, a first mounting groove and a second mounting groove are sequentially formed in the axial direction of a main shaft of the motor, the first mounting groove is communicated with the second mounting groove, a limiting part is arranged at the joint of the first mounting groove and the second mounting groove and extends towards the central axis of the main shaft from the body, and the first mounting groove is used for mounting an elastic piece of the motor. The second mounting groove is used for mounting a bearing of the motor, and the limiting part is used for limiting the bearing in the axial direction. The shell provided by the utility model can reduce the damage probability of the elastic piece of the motor.

Description

Technical Field

[0001] This application relates to the technical field of motors, and particularly to a motor housing, a motor, and a vehicle. Background Art

[0002] In existing motors, along the axial direction of the main shaft of the motor, when the rotor assembly moves axially, it drives the main shaft to move, and while the main shaft moves, it drives the rotating shaft to move. To ensure the stable and reliable operation of the motor, an elastic member is set to pre-tighten and limit the bearing to achieve the limit of the rotor assembly. And to reduce costs, an axially inductive eddy current sensor is used. However, when the displacement of the rotor assembly is large, it causes the bearing to displace axially towards the elastic member too much, and there is a risk of damage to the elastic member. Utility Model Content

[0003] This application provides a motor housing, a motor, and a vehicle, which can reduce the probability of damage to the elastic member of the motor.

[0004] This application provides a motor housing, which includes a body. Along the axial direction of the main shaft of the motor, a first installation groove and a second installation groove are sequentially provided. The first installation groove is communicated with the second installation groove. A limiting portion is provided at the connection of the first installation groove and the second installation groove. The limiting portion extends from the body towards the central axis of the main shaft. The first installation groove is used to install the elastic member of the motor, the second installation groove is used to install the bearing of the motor, and the limiting portion is used to axially limit the bearing.

[0005] Among them, the limiting portion includes a convex table surface. Along the radial direction of the motor main shaft, the size of the first installation groove is smaller than that of the second installation groove, so as to form a convex table surface facing the second installation groove at the connection of the first installation groove and the second installation groove. The convex table surface is used to limit the movement of the bearing towards the first installation groove.

[0006] Among them, the projection of the limiting portion along the axial direction towards the first installation groove is located within the notch of the first installation groove, so that the side of the limiting portion close to the first installation groove is used to abut against the elastic member; the projection of the limiting portion along the axial direction towards the second installation groove is located within the notch of the second installation groove, so that the side of the limiting portion close to the second installation groove is used to abut against the elastic member.

[0007] This application provides a motor, which includes a main shaft, a rotor assembly, a bearing, an elastic member, and the above-mentioned housing. Among them, the main shaft, the rotor assembly, the bearing, and the elastic member are arranged in the housing, and the elastic member, the bearing, and the rotor assembly are sequentially sleeved outside the main shaft along the axial direction. Among them, the elastic member is installed in the first installation groove, and the bearing is installed in the second installation groove; among them, the limiting portion axially covers a part of the bearing towards the second installation groove.

[0008] The motor further includes an eddy current sensor and a target wheel arranged in sequence along the axial direction. The eddy current sensor is fixedly connected to the housing. The target wheel is sleeved outside the main shaft and is located on the side of the elastic member away from the bearing. The eddy current sensor is located on the side of the target wheel sleeve away from the elastic member. Along the axial direction, the gap between the eddy current sensor and the target wheel is greater than the displacement of the bearing in the second installation groove.

[0009] The limiting portion includes a convex table surface. Along the radial direction of the motor main shaft, the size of the first installation groove is smaller than that of the second installation groove, so as to form a convex table surface facing the second installation groove at the connection of the first installation groove and the second installation groove. The convex table surface is used to limit the movement of the bearing towards the first installation groove. Along the radial direction of the main shaft, the ratio of the size of the convex table surface to the size of the contact surface of the elastic member and the outer diameter of the bearing includes 1:0.7 to 1:1.5.

[0010] The bearing includes a bearing mount. The bearing mount includes a die-cast aluminum alloy mount, and the housing includes a die-cast aluminum alloy housing.

[0011] The motor further includes a gasket. Along the axial direction, the gasket is located between the bearing and the limiting portion.

[0012] The elastic member includes a corrugated spring.

[0013] The present application provides a vehicle, which includes the above-mentioned motor.

[0014] The beneficial effect of the present application is that: the housing of the motor of the present application includes a body, and the body is sequentially provided with a first installation groove and a second installation groove along the axial direction of the motor main shaft. The first installation groove is communicated with the second installation groove, and a limiting portion is provided at the connection of the first installation groove and the second installation groove. The limiting portion extends from the body towards the central axis of the main shaft. The first installation groove is used to install the elastic member of the motor, the second installation groove is used to install the bearing of the motor, and the limiting portion is used to axially limit the bearing. That is, the housing is provided with a first installation groove and a second installation groove that are communicated and respectively used to install the elastic member and the bearing, and a limiting portion extending from the body towards the central axis of the main shaft is provided at the connection of the first installation groove and the second installation groove to axially limit the bearing. Therefore, when the axial force received by the bearing exceeds the pre-tightening force of the elastic member and continues to move towards the elastic member, the limiting portion axially limits the bearing, so that the bearing cannot continue to compress the elastic member, which can reduce the probability of damage to the elastic member; further, it can improve the stability of the motor. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings, where:

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the motor provided by the present application;

[0017] Figure 2 is Figure 1 a partially enlarged schematic diagram of the embodiment;

[0018] Figure 3 It is a schematic structural diagram of an embodiment of the limiting part provided by the present application;

[0019] Figure 4 is Figure 1 a partially enlarged schematic diagram of the limiting part in the embodiment;

[0020] Figure 5 It is a schematic structural diagram of another embodiment of the limiting part provided by the present application;

[0021] Figure 6 It is a schematic structural diagram of an embodiment of the gasket provided by the present application;

[0022] Figure 7 It is a schematic structural diagram of an embodiment of the vehicle provided by the present application. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0024] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0025] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0026] This application provides a motor. Refer to Figures 1 to 2 , Figure 1 which is a schematic structural diagram of an embodiment of the motor provided by this application. Figure 2 It is Figure 1 a partially enlarged schematic diagram of the embodiment. The motor 10 includes a main shaft 120, a rotor assembly 130, a bearing 140, an elastic member 150, and a housing 110. Among them, the main shaft 120, the rotor assembly 130, the bearing 140, and the elastic member 150 are arranged inside the housing 110, and the elastic member 150, the bearing 140, and the rotor assembly 130 are sequentially sleeved outside the main shaft 120 along the axial direction X of the main shaft 120. Among them, the housing 110 includes a body (not marked in the figure). The body is sequentially provided with a first installation groove 111 and a second installation groove 112 along the axial direction X. The first installation groove 111 communicates with the second installation groove 112. A limiting portion 113 is provided at the connection of the first installation groove 111 and the second installation groove 112. The limiting portion 113 extends from the body towards the central axis of the main shaft 120. The elastic member 150 is installed in the first installation groove 111, and the bearing 140 is installed in the second installation groove 112. Among them, the limiting portion 113 covers a part of the bearing 140 along the axial direction X towards the second installation groove 112. The limiting portion 113 is used to axially limit the bearing 140 along the axial direction X.

[0027] In this embodiment, the housing 110 of this embodiment is provided with a first installation groove 111 and a second installation groove 112 that communicate with each other and are respectively used for installing the elastic member 150 and the bearing 140. And a limiting portion 113 that extends from the body towards the central axis of the main shaft 120 is provided at the connection of the first installation groove 111 and the second installation groove 112 to axially limit the bearing 140 along the axial direction X. Therefore, when the axial force received by the bearing 140 exceeds the pre-tightening force of the elastic member 150 and continues to move towards the elastic member 150, the limiting portion 113 axially limits the bearing 140 along the axial direction X, so that the bearing 140 cannot continue to compress the elastic member 150, which can reduce the probability of damage to the elastic member 150; further, it can improve the stability of the motor 10.

[0028] In an embodiment, refer to Figure 3 , Figure 3FIG. 0 is a schematic structural diagram of an embodiment of the limiting part provided by the present application. The limiting part 113 includes a convex table surface 1131. Along the radial direction Y of the main shaft 120, the size of the first mounting groove 111 is smaller than that of the second mounting groove 112, so as to form a convex table surface 1131 facing the second mounting groove 112 at the connection between the first mounting groove 111 and the second mounting groove 112. The convex table surface 1131 is used to limit the movement of the bearing 140 towards the first mounting groove 111. In this embodiment, by setting mounting grooves with different sizes, a convex table surface 1131 is formed at the connection of the two mounting grooves. When the axial force received by the bearing 140 is greater than the pre-tightening force of the elastic member 150 and the bearing 140 moves along the axial direction X towards the first mounting groove 111, the convex table surface 1131 limits the bearing 140, so that the bearing 140 cannot continue to compress the elastic member 150, which can reduce the probability of damage to the elastic member 150 and improve the stability of the motor 10; in addition, the convex table surface 1131 in this embodiment is simple to process and easy to implement.

[0029] In one embodiment, referring to Figure 4 , Figure 4 is Figure 1 a partially enlarged schematic diagram of the limiting part in the embodiment. The limiting part 113 includes a convex table surface 1131. Along the radial direction Y, the ratio of the size a of the convex table surface 1131 to the size b of the contact surface between the elastic member 150 and the outer diameter of the bearing 140 includes 1:0.7 to 1:1.5. For example, the ratios are 1:0.7, 1:0.9, 1:1, 1:1.2, 1:3, 1:1.5, etc.

[0030] In this embodiment, by setting the ratio of the size a of the convex table surface 1131 to the size b of the contact surface between the elastic member 150 and the outer diameter of the bearing 140 to include 1:0.7 to 1:1.5, it is ensured that the convex table surface 1131 can effectively limit the bearing 140, and at the same time, the pre-tightening force between the elastic member 150 and the bearing 140 is ensured.

[0031] In one embodiment, referring to Figure 5 , Figure 5 FIG. 19 is a schematic structural diagram of another embodiment of the limiting part provided by the present application. The projection of the limiting part 113 along the axial direction X towards the first mounting groove 111 is located within the notch of the first mounting groove 111, so that the side of the limiting part 113 close to the first mounting groove 111 is used to abut against the elastic member 150. The projection of the limiting part 113 along the axial direction X towards the second mounting groove 112 is located within the notch of the second mounting groove 112, so that the side of the limiting part 113 close to the second mounting groove 112 is used to abut against the elastic member 150.

[0032] Wherein, the notch refers to the notch where the first mounting groove 111 and the second mounting groove 112 communicate. It can be understood that the limiting part 113 is located between the elastic member 150 and the bearing 140, and the elastic member 150 and the bearing 140 are respectively provided on the opposite sides of the limiting part 113. Referring to the figure,Figure 4 It is a schematic structural diagram of another embodiment of the limiting portion 113 provided by the present application. The unconnected part of the first installation groove 111, the limiting portion 113 and the second installation groove 112 is in a "T" shape. It should be noted that the part of the elastic member 150 that does not contact the limiting portion 113 also abuts against the bearing 140 to ensure the pre-tightening force between the elastic member 150 and the bearing 140.

[0033] In one embodiment, along the radial direction Y, the size of the second installation groove 112 is 65 - 75 mm, and the outer diameter size of the bearing 140 is 66 - 74 mm. For example, the size of the second installation groove 112 is 65 mm, 67 mm, 68 mm, 69 mm, 71 mm, 72 mm, 75 mm, etc. Correspondingly, the outer diameter size of the bearing 140 is 66 mm, 67 mm, 68 mm, 69 mm, 71 mm, 72 mm, 74 mm. It can be known that the size of the second installation groove 112 should be larger than the outer diameter size of the bearing 140, otherwise the bearing 140 cannot be installed into the second installation groove 112.

[0034] In one embodiment, the bearing 140 includes a bearing mounting seat (not shown in the figure). Among them, the bearing mounting seat includes a die-cast aluminum alloy bearing mounting seat, and the housing 110 includes a die-cast aluminum alloy housing. Among them, the bearing mounting seat is a bearing mounting seat without a steel insert, and both the bearing mounting seat and the housing 110 are die-cast aluminum alloy bearing mounting seats and housing 110, that is, the strength of the convex table surface 1131 and the bearing mounting seat meets the requirements, and the cost can be reduced at the same time.

[0035] In other embodiments, the bearing mounting seat and the housing 110 may also include bearing mounting seats and housing 110 made of alloys with high rigidity, which are not limited herein.

[0036] In one embodiment, the motor 10 further includes an eddy current sensor 160 and a target wheel 170 arranged in sequence along the axial direction X. Among them, the eddy current sensor 160 is fixedly connected to the housing 110, the target wheel 170 is sleeved outside the main shaft 120, and is located on the side of the elastic member 150 away from the bearing 140, and the eddy current sensor 160 is located on the side of the sleeve of the target wheel 170 away from the elastic member 150. Along the axial direction X, the gap between the eddy current sensor 160 and the target wheel 170 is greater than the displacement of the bearing 140 in the second installation groove 112. The motor 10 of this embodiment is provided with the eddy current sensor 160 and the target wheel 170 to replace the resolver stator and the resolver rotor, which can reduce the cost of the motor 10. In addition, the gap between the eddy current sensor 160 and the target wheel 170 is greater than the displacement of the bearing 140 in the second installation groove 112, that is, after the displacement of the bearing 140 in the second installation groove 112 is limited by the limiting portion 113, the bearing 140 stops moving towards the elastic member 150, and thus the main shaft 120 stops moving. At this time, there is still a certain distance between the target wheel 170 and the eddy current sensor 160, which can avoid damage to the eddy current sensor 160 caused by the target wheel 170 hitting the eddy current sensor 160, and enhance the stability of the motor 10.

[0037] In one embodiment, the motor 10 further includes a gasket 180. Along the axial direction X, the gasket 180 is located between the bearing 140 and the limiting portion 113. Among them, the gasket 180 can be used to reduce the displacement distance of the bearing 140 in the second installation groove 112, thereby reducing the acting force of the bearing 140 on the elastic member 150.

[0038] In one embodiment, the motor 10 may include a plurality of gaskets 180. According to the required displacement distance of the bearing 140 in the second installation groove 112, one or more gaskets 180 can be selected to be provided. In other embodiments, the plurality of gaskets 180 can also be replaced by gaskets 180 with different thicknesses, which can reduce the number of components of the motor 10.

[0039] In one embodiment, the elastic member 150 may be an annular elastic member (not shown in the figure), and the annular elastic member is sleeved on the outer periphery of the main shaft 120. The elastic member 150 may include a plurality of sub-elastic members (not shown in the figure), and the plurality of sub-elastic members are uniformly arranged on the circumferential side of the main shaft 120.

[0040] In one embodiment, the elastic member 150 includes a corrugated elastic member (not shown in the figure).

[0041] This application also provides a vehicle. Refer to Figure 4 , Figure 4 is a schematic structural diagram of an embodiment of the vehicle provided by this application. The vehicle 20 includes a motor, where the motor is any one of the motors in the above motor embodiments, and will not be elaborated here.

[0042] The above are only the implementation manners of this application, and do not thus limit the patent scope of this application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of this application, or directly or indirectly applied in other related technical fields, shall similarly be included within the patent protection scope of this application.

Claims

1. A housing of an electric machine, characterized in that, include: A main body, a first mounting groove and a second mounting groove are sequentially provided along the axial direction of the main shaft of the motor, the first mounting groove is communicated with the second mounting groove, a limiting portion is provided at the connection between the first mounting groove and the second mounting groove, the limiting portion extends from the main body toward the central axis of the main shaft, the first mounting groove is used to install the elastic part of the motor, the second mounting groove is used to install the bearing of the motor, and the limiting portion is used to limit the bearing along the axial direction.

2. The housing according to claim 1, characterized in that, The limiting portion includes a boss surface, and along the radial direction of the motor main shaft, the size of the first mounting groove is smaller than the size of the second mounting groove, so that a boss surface facing the second mounting groove is formed at the connection between the first mounting groove and the second mounting groove, and the boss surface is used to limit the movement of the bearing toward the first mounting groove.

3. The housing according to claim 1, characterized in that The projection of the limiting portion along the axial direction toward the first mounting groove is located in the notch of the first mounting groove, so that the side of the limiting portion close to the first mounting groove is used to abut against the elastic member; The projection of the limiting portion along the axial direction toward the second installation slot is located in the slot opening of the second installation slot, so that a side of the limiting portion close to the second installation slot is used to abut against the elastic member.

4. A motor, characterized in that, include: A main shaft, a rotor assembly, a bearing, an elastic member, and a housing according to any one of claims 1 to 3, wherein the main shaft, the rotor assembly, the bearing, and the elastic member are arranged in the housing, and the elastic member, the bearing, and the rotor assembly are sequentially sleeved outside the main shaft along the axial direction, wherein the elastic member is installed in the first installation groove, and the bearing is installed in the second installation groove; Wherein, the limiting portion covers a portion of the bearing along the axial direction toward the second mounting groove.

5. The motor according to claim 4, characterized in that, The motor also includes: An eddy current sensor and a target wheel are sequentially arranged along the axial direction, wherein the eddy current sensor is fixedly connected to the housing, the target wheel sleeve is arranged outside the main shaft and is located on a side of the elastic member away from the bearing, and the eddy current sensor is located on a side of the target wheel sleeve away from the elastic member; Along the axial direction, a gap between the eddy current sensor and the target wheel is larger than a displacement of the bearing in the second mounting groove.

6. The motor according to claim 4, characterized in that The limiting portion includes a boss surface, and along the radial direction of the motor main shaft, the size of the first mounting groove is smaller than the size of the second mounting groove, so that a boss surface facing the second mounting groove is formed at the connection between the first mounting groove and the second mounting groove, and the boss surface is used to limit the movement of the bearing toward the first mounting groove; Wherein, along the radial direction of the main shaft, the ratio of the size of the boss surface to the size of the contact surface of the outer diameter of the elastic member and the bearing is 1:0.7 to 1:1.

5.

7. The motor according to claim 4, wherein The bearing comprises a bearing mounting seat, wherein the bearing mounting seat comprises a die-cast aluminum alloy mounting seat, and the housing comprises a die-cast aluminum alloy housing.

8. The motor according to claim 4, characterized in that The motor further includes a gasket, and along the axial direction, the gasket is located between the bearing and the limiting portion.

9. The motor according to any one of claims 4-8, characterized in that, The elastic member includes a corrugated spring.

10. A vehicle, characterized in that, Comprising: The motor according to any one of claims 4-9.

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