Stator positioning and mounting structure and EMB motor
By setting limiting protrusions and positioning grooves on the inner wall of the EMB motor housing, and combining them with the cover plate to rivet the bearing, the problems of stator assembly accuracy and bearing damage were solved, thus improving the assembly accuracy and reliability of the EMB motor.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU HEIGOR MOTOR CO LTD
- Filing Date
- 2025-08-19
- Publication Date
- 2026-07-10
AI Technical Summary
The quality of stator assembly affects the performance of EMB motors and the reliability of the braking system. Existing technologies cannot guarantee assembly accuracy, especially the assembly tolerance of the three-phase power supply pins at the end of the busbar is difficult to control.
The structure of limiting protrusions and positioning grooves on the inner wall of the housing is adopted. The stator assembly is axially positioned by the limiting protrusions, and the bearing is riveted by the cover plate to ensure assembly accuracy and prevent bearing damage.
The assembly precision of the stator assembly was improved, the assembly tolerance of the three-phase power supply pins at the end of the busbar was reduced, the bearing was prevented from rotating in the bearing housing, the bearing was avoided, and more precise riveting control was achieved.
Smart Images
Figure CN224481561U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of EMB motor technology, and in particular to a stator positioning and mounting structure and an EMB motor. Background Technology
[0002] The EMB (Electronic Mechanical Brake) motor, as the core actuator of the brake-by-wire system, adopts a fully electronic design without hydraulic lines, directly driving the brake caliper to achieve braking. Its core structure includes:
[0003] Stator: Composed of an iron core and windings, it generates a rotating magnetic field when energized, driving the rotor to rotate. The iron core is made of stacked high-permeability silicon steel sheets, and the windings are embedded in the iron core slots after insulation treatment.
[0004] Rotor: Rotates under the influence of the stator magnetic field. The high-speed rotation is converted into high torque by the reducer, which drives the clamping device (such as a ball screw) to press the friction plate and generate braking force.
[0005] Reducer: It usually adopts a planetary gear or parallel shaft gear design to amplify the output torque of the motor to meet the high torque requirements of the braking system;
[0006] Control unit: Monitors motor speed and position through sensors and adjusts control signals in real time to ensure precise matching of braking force.
[0007] The assembly quality of the stator directly affects the motor performance and the reliability of the braking system. Therefore, a stator positioning and mounting structure is needed to reduce assembly errors. Utility Model Content
[0008] This utility model solves the problems in related technologies and proposes a stator positioning and installation structure and an EMB motor. By using the step on the inner wall of the housing for limiting, it ensures the axial dimension of the stator assembly press-fit, ensures the assembly accuracy, eliminates the assembly tolerance of the iron core, and thus reduces the assembly tolerance of the three-phase power supply pin at the end of the busbar.
[0009] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: a stator positioning and installation structure, including a housing and a stator assembly, wherein the inner wall of the housing is provided with a limiting protrusion in the circumferential direction, and the stator assembly is assembled in the housing and axially positioned by the limiting protrusion.
[0010] As a preferred embodiment, the stator assembly includes a busbar, an iron core, and a winding, wherein the winding is wound around the iron core, and the iron core abuts against a limiting protrusion.
[0011] As a preferred embodiment, a positioning groove is formed on the limiting protrusion, and the pins of the busbar are inserted into the positioning groove.
[0012] As a preferred embodiment, the housing includes an integrally formed end cap and a housing body. The end cap has a cable outlet hole, through which the copper busbar of the busbar passes.
[0013] As a preferred embodiment, a bearing chamber is formed on the inner side of the end cover, and the bearing is placed in the bearing chamber and riveted to the end cover by a cover plate.
[0014] As a preferred embodiment, the bearing chamber is provided with a countersunk hole, and the cover plate is placed in the countersunk hole and riveted to the end cover by a riveting fixture.
[0015] As a preferred embodiment, the cover plate is annular and presses against the outer ring of the bearing.
[0016] In another aspect, this utility model also provides an EMB motor, including the stator positioning and mounting structure as described above.
[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model uses the steps on the inner wall of the housing for limiting, ensuring the axial dimension of the stator assembly press-fit, ensuring the assembly accuracy, eliminating the assembly tolerance of the iron core, and thus reducing the assembly tolerance of the three-phase power supply pins at the end of the busbar output line; by pressing the outer ring of the bearing with the cover plate, the bearing is assembled into the bearing housing, preventing the bearing from rotating in the bearing housing and preventing the bearing from running off the outer ring; and by using a riveting fixture to rivet the cover plate to the end cover, the bearing is pressed tightly by the cover plate. This design avoids the riveting head directly riveting onto the bearing, which would cause bearing damage. The riveting pressure can be controlled more precisely, avoiding incomplete riveting and preventing the bearing from running off the outer ring after long-term operation. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of the stator positioning and installation structure of this utility model;
[0019] Figure 2 This is a sectional view of the stator positioning and mounting structure of this utility model;
[0020] Figure 3 This is a schematic diagram of the bearing installation structure of this utility model;
[0021] Figure 4 This is a cross-sectional view of the casing of this utility model;
[0022] Figure 5 This is a structural schematic diagram of the stator assembly of this utility model.
[0023] In the picture:
[0024] 1. Housing; 101. End cap; 102. Housing body; 103. Outlet hole; 104. Countersunk hole; 105. Bearing chamber; 2. Stator assembly; 201. Busbar; 2011. Pin; 2012. Copper busbar; 202. Iron core; 203. Winding; 3. Cover plate; 4. Limiting protrusion; 5. Positioning groove; 6. Bearing. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0027] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0028] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.
[0029] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0030] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.
[0031] Example 1
[0032] like Figures 1 to 5As shown, a stator positioning and installation structure includes a housing 1 and a stator assembly 2. The inner wall of the housing 1 has a limiting protrusion 4 along the circumferential direction, forming a stepped structure. A positioning groove 5 is formed on the limiting protrusion 4. The stator assembly 2 includes a busbar 201, an iron core 202, and a winding 203. The winding 203 is wound around the iron core 202. The pins 2011 of the busbar 201 are inserted into the positioning groove 5. During assembly, the stator assembly 2 is placed on a special tooling base, and the housing 1 is heated and heat-fitted onto the stator assembly 2. At this time, the iron core 202 abuts against the limiting protrusion 4, and the step on the inner wall of the housing 1 provides limiting, ensuring the axial dimension of the stator assembly 2 during pressing, ensuring assembly accuracy, eliminating the assembly tolerance of the iron core 202, and thus reducing the assembly tolerance of the three-phase power pins at the busbar terminal. Then, the pins of the busbar 201 are inserted into the positioning groove 5.
[0033] In one embodiment, the housing 1 includes an integrally formed end cap portion 101 and a housing body portion 102. The end cap portion 101 has a cable outlet hole 103, through which the copper busbar 2012 of the busbar 201 passes.
[0034] In one embodiment, a bearing chamber 105 is formed inside the end cap 101. The bearing 6 is placed inside the bearing chamber 105 and riveted to it by a cover plate 3. Specifically, a countersunk hole 104 is provided on the bearing chamber 105. The annular cover plate 3 is placed inside the countersunk hole 104 and presses down on the outer ring of the bearing 6 to prevent the bearing 6 from rotating inside the bearing chamber 105 and to prevent the outer ring of the bearing 6 from running. The cover plate 3 is riveted to the end cap 101 by a riveting fixture, and the bearing 6 is pressed by the cover plate 3. This design avoids the riveting head directly riveting onto the bearing 6, which would damage the bearing shaft. The riveting pressure can be controlled more precisely to avoid incomplete riveting and to prevent the bearing 6 from running after long-term operation. In addition, the cover plate 3 is made of a high-hardness material, such as 65Mn, to meet the requirements of high strength and wear resistance.
[0035] Example 2
[0036] In another aspect, this utility model also provides an EMB motor, including the stator positioning and mounting structure in Embodiment 1.
[0037] The above are preferred embodiments of this utility model. Those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments described above. Any obvious improvements, substitutions or modifications made by those skilled in the art based on this utility model shall fall within the protection scope of this utility model.
Claims
1. A stator positioning and mounting structure, characterized in that: It includes a housing (1) and a stator assembly (2). The inner wall of the housing (1) is provided with a limiting protrusion (4) in the circumferential direction. The stator assembly (2) is assembled in the housing (1) and is axially positioned by the limiting protrusion (4).
2. The stator positioning and mounting structure according to claim 1, characterized in that: The stator assembly (2) includes a busbar (201), an iron core (202) and a winding (203), the winding (203) being wound around the iron core (202), and the iron core (202) abutting against the limiting protrusion (4).
3. The stator positioning and mounting structure according to claim 2, characterized in that: A positioning groove (5) is formed on the limiting protrusion (4), and the pin (2011) of the busbar (201) is inserted into the positioning groove (5).
4. The stator positioning and mounting structure according to claim 2, characterized in that: The housing (1) includes an integrally formed end cap (101) and a housing body (102). The end cap (101) has a wire outlet hole (103) and the copper busbar (2012) of the busbar (201) passes through the wire outlet hole (103).
5. The stator positioning and mounting structure according to claim 4, characterized in that: The bearing chamber (105) is formed inside the end cap (101), and the bearing (6) is placed inside the bearing chamber (105) and riveted to the end cap (101) by the cover plate (3).
6. The stator positioning and mounting structure according to claim 5, characterized in that: The bearing chamber (105) is provided with a countersunk hole (104), and the cover plate (3) is placed in the countersunk hole (104) and riveted to the end cover (101) by a riveting fixture.
7. The stator positioning and mounting structure according to claim 5, characterized in that: The cover plate (3) is annular and presses down on the outer ring of the bearing (6).
8. An EMB motor, characterized in that: Includes the stator positioning and mounting structure as described in any one of claims 1 to 7.