Braking motor and housing for a braking motor

Abstract

The utility model relates to brake motor and the casing for brake motor. The casing for brake motor includes hollow casing body and bearing seat, and the bearing seat is assembled (such as interference fit) in the casing body, wherein the casing body is configured as a deep-drawn shell. The brake motor includes the casing and the stator and hollow shaft of above, the stator is installed in the casing, the bearing is installed in the bearing inner ring in the bearing seat, and the hollow shaft is installed in the bearing inner ring. The casing according to the utility model can reduce the cost, and still can realize various functions of the casing.

Description

Technical Field

[0001] This utility model relates to the field of vehicle motors, specifically to a hollow shaft brake motor. On one hand, this utility model relates to a housing for a brake motor. On the other hand, this utility model relates to a brake motor including the housing. Background Technology

[0002] Currently, most hollow shaft brake motors on the market use die-cast aluminum housings to meet the diverse and complex application needs of brake system manufacturers.

[0003] Figure 1 The diagram shows a prior art example of a brake motor 1, which has a die-cast aluminum housing 10 with reinforcing ribs 11 near the top and through holes 12 at the bottom for fixing to a brake pump (not shown) by means of screws. Figure 1 The plug 20 of the brake motor 1 is also shown, which is connected to the brake pump for control.

[0004] Die-cast aluminum housings are integrally molded to meet complex customer needs. However, die-cast aluminum housings have the following disadvantages: high material costs, long processing time, significant material waste, and environmental unfriendliness; additional riveting, gluing, or retaining components are required to fit with steel stators; and they place high demands on the internal space of the motor. All of these factors contribute to the high price of the finished aluminum housing and the large investment required in production equipment.

[0005] There is a need to improve existing die-cast aluminum housings. Utility Model Content

[0006] The purpose of this invention is to replace existing die-cast aluminum housings. To this end, this invention proposes a novel housing for a brake motor, comprising a hollow housing body and a bearing housing fitted (e.g., with an interference fit) within the housing body. The housing body is constructed as a deep-drawn shell. The materials of the housing body and the bearing steel are, for example, steel.

[0007] The concept of this utility model is to manufacture the complex functional structures of the housing that require processing separately from the housing body. The housing body is formed by deep drawing steel, which is simple to manufacture, requires less processing, has low raw material cost, and almost no material waste. Other functional structures such as bearing seats are manufactured as separate processing parts and installed into the housing body to assemble a complete housing. This satisfies the various functions of the housing while reducing costs.

[0008] According to an embodiment, the top inner wall of the housing body is fixed to the top of the bearing seat, for example, by welding.

[0009] According to another embodiment, the top inner wall of the housing body is fixed to the top of the bearing seat, for example by riveting.

[0010] According to an embodiment, the housing body includes a main body, a neck, and a transition portion between the main body and the neck.

[0011] According to an embodiment, a radially outwardly extending bearing housing flange extends from the outer wall of the bearing housing and abuts against the inner wall of the housing body (e.g., the junction between the neck and the transition section). The bearing housing flange is, for example, located near the bottom end of the bearing housing. This arrangement helps to position the bearing housing within the housing body.

[0012] According to an embodiment, a radially inwardly extending bearing flange extends from the inner wall of the bearing housing. The bearing flange is located, for example, at the bottom end of the bearing housing. This arrangement facilitates the mounting of the bearing within the bearing housing.

[0013] According to an embodiment, the upper part of the inner wall of the bearing housing is provided with internal threads, and the housing also includes a lock nut with external threads, such that the lock nut threadedly engages with the bearing housing. With this arrangement, the bearing can be positioned by tightening the lock nut during bearing installation in the bearing housing.

[0014] According to another embodiment, the upper part of the outer wall of the bearing housing is provided with external threads, while the neck of the housing body is provided with internal threads, and the bearing housing and the housing body are fixed together by screws.

[0015] Preferably, the outer circumferential surface of the transition portion has axially extending recesses, which are evenly distributed in the circumferential direction and number 3-10. The recesses are arc-shaped and transition to the outer circumferential surface of the transition portion with the recesses, so that in the axial section, the transition portion presents a circular shape with concave and convex waves.

[0016] Preferably, the transition portion includes several (e.g., 2-3) segments along the axial direction, with rounded corners between each segment, so that the transition portion presents a wavy shape in the radial section.

[0017] Preferably, the housing body has a flange plate at the end of the main body away from the constriction neck. The flange plate has through holes to allow the housing body to be mounted to the brake pump with screws. At the junction of the flange plate and the main body, two protrusions are provided around each through hole, symmetrically distributed about the through holes. The flange plate may have 3-4 pairs of protrusions.

[0018] This utility model also proposes a brake motor, which includes the aforementioned housing, stator, and hollow shaft. The stator is installed inside the housing, a bearing is installed in a bearing housing, and the hollow shaft is installed in the inner ring of the bearing. Other components of the brake motor are also located inside the housing. Additionally, a lock nut can be screwed into the bearing housing to help position the bearing.

[0019] According to an embodiment, the brake motor also includes a brake pump, which is fixed to the housing body, such as a flange plate, for example by 3-4 screws.

[0020] According to this utility model, a deep-drawn housing body and a separate bearing seat replace the one-piece die-cast aluminum housing. For example, during assembly, the bearing seat is pressed into the housing body, creating an interference fit between them. The bearing seat flange rests against the inner wall of the housing body. Then, the top of the bearing seat is welded to the top inner wall of the housing body, fixing the bearing seat in place. Alternatively, during assembly, the bearing seat is screwed into the neck of the housing body until the bearing seat flange rests against the housing body. Then, rivets are pressed onto the top of the housing body, breaking the thread structure with 6 to 10 rivet points to prevent the bearing seat from loosening, thus securing it. Afterward, the bearing is installed in the bearing seat, with its lower end resting on the bearing flange of the bearing seat. The lower part of the inner wall of the bearing seat has a clearance fit with the bearing. Then, a lock nut is threaded onto the upper part of the inner wall of the bearing seat, and the bearing is fixed in place by tightening the lock nut.

[0021] The casing of this invention has low production cost and is easy to manufacture. Although the stretching process has great limitations on shape, making it difficult to directly manufacture casings with complex functional structures through stretching, in this invention, the casing body is manufactured using the stretching process, while the functional structure parts are manufactured using separate machined parts. Then, the casing body and the machined parts are assembled together. In this way, complex structures can be manufactured to meet functional requirements, while also keeping costs low.

[0022] The housing, bearing seat, and locking nut of this invention are all made of steel, which is not sensitive to temperature changes and can withstand a wide range of temperature changes.

[0023] The casing of this utility model has a reinforcing structure at large-angle bends (such as at the transition section and the junction between the flange plate and the main body) to avoid the problem of weak strength of the deep-drawn casing at large-angle bends, thereby improving the overall strength of the casing to meet the requirements of complex application environments. Attached Figure Description

[0024] The features and advantages of this utility model will become apparent from the following detailed description of embodiments with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, those skilled in the art can obtain all other embodiments without inventive effort, and these embodiments all fall within the protection scope of this utility model. In the accompanying drawings: Figure 1 This is a schematic perspective view of a prior art brake motor; Figure 2This is a schematic perspective view of the brake motor according to an embodiment of the present utility model; Figure 3 This is an exploded perspective view of the casing according to an embodiment of the present utility model; Figure 4 This is a cross-sectional view of the casing according to an embodiment of the present utility model; Figure 4A yes Figure 4 An enlarged view of the circled portion shows the top inner wall of the housing body welded to the top of the bearing housing; Figure 4B yes Figure 4 Another enlarged view of the circled portion shows the top inner wall of the housing body riveted to the top of the bearing housing; Figure 4C yes Figure 4 A top view of the casing, showing the top inner wall of the casing body riveted to the top of the bearing housing; Figure 5 This is a front view of the housing body according to an embodiment of the present utility model; Figure 5A It is along Figure 5 A cross-sectional view along line AA; Figure 6 This is a front view of the housing body according to another embodiment of the present invention; Figure 6A It is along Figure 6 A cross-sectional view of the BB line; Figure 7A This is a top view of the housing body according to another embodiment of the present invention; Figure 7B This is a top view of the housing body according to another embodiment of the present utility model; Figure 8 This is a cross-sectional view of the brake motor according to an embodiment of the present invention, which also shows the brake pump.

[0025] In the accompanying drawings, embodiments of the present invention are shown in a simplified manner for clarity. Furthermore, the drawings are not necessarily shown to scale. Detailed Implementation

[0026] The casing of this utility model will be described in detail below with reference to the accompanying drawings. For ease of description, directional terms are used below, which refer to the directions shown in the drawings; the actual directions may differ.

[0027] Figure 2 This shows a perspective view of the brake motor 100 according to an embodiment of the present invention. Figure 3An exploded perspective view of the housing is shown. As shown, the brake motor 100 includes a housing comprising a housing body 110 configured as a deep-drawn shell and a bearing housing 120 mounted within the housing body, both being hollow structures. The housing body includes a main body portion 111, a flange plate 112, a necked portion 113, and a transition portion 114 between the main body portion 111 and the necked portion 113. The flange plate 112 has a through hole 112a. Furthermore, an opening is provided at the top of the housing body 110, through which a locking nut 160 is screwed onto the bearing housing 120 from above.

[0028] Figure 4 This shows how the housing body 110 and the bearing seat 120 are assembled. Figure 4A The diagram illustrates how a housing body 110 and a bearing seat 120 are assembled according to one embodiment. As shown, the inner wall of the neck 113 of the housing body 110 is interference-fitted with the outer wall of the bearing seat 120, and the top inner wall of the housing body 110 is fixed to the top of the bearing seat 120 by a welded portion W.

[0029] Figure 4B This illustrates how a housing body 110 and a bearing seat 120 are assembled according to another embodiment, wherein the inner ring of the neck 113 of the housing body 110 has an internal thread structure T, and the upper part of the outer ring of the bearing seat 120 has an external thread structure, such that the bearing seat 120 and the housing body 110 are connected by threads, and after installation, a riveting point R is formed at the top of the housing body. Figure 4C As shown, eight riveting points R are set along the circumferential direction, which prevent the bearing housing 120 from loosening and exiting the housing body 110 by disrupting the thread structure. This method can save on investment in expensive welding equipment.

[0030] Furthermore, near the bottom end of the bearing housing 120, a radially outwardly extending bearing housing flange 121 is provided on the outer wall of the bearing housing 120, which abuts against the junction between the neck 113 and the transition portion 114 of the housing body 110. At the bottom end of the bearing housing 120, a radially inwardly extending bearing flange 122 is provided on the inner wall of the bearing housing 120, allowing the bearing to rest on it. The upper part 123 of the inner wall of the bearing housing 120 has internal threads to engage the locking nut 160, while the lower part 124 of the inner wall is unthreaded to mate with the bearing.

[0031] Because the shell wall of a deep-drawn casing is relatively thin, its strength is low at large-angle bends. Therefore, a reinforcing structure is incorporated into the casing body 110, such as... Figures 5-7B As shown.

[0032] Figure 5-Figure 5AThe transition portion 113 is shown to have axially extending recesses 113a on its outer circumferential surface, which are evenly distributed along the circumferential direction; in this example, there are six such recesses. The recesses 113a have an arcuate structure, and the outer circumferential surface of the transition portion transitions to the recesses 113a at rounded corners. For example... Figure 5A As shown, the transition portion 113 presents a circular shape with concave and convex waves in the axial section.

[0033] Figures 6-6A Another reinforcing structure is shown. As shown, the transition section 113' comprises three segments 113a', 113b', and 113c' along the axial direction, with rounded corners between each segment. Therefore, the transition section 113' presents a wavy shape in the radial section, as... Figure 6A As shown.

[0034] Figures 7A-7B The reinforcing structure at the junction of the main body 111 and the flange plate 112 is shown. For example... Figure 7A As shown, at the junction of the flange plate 112 and the main body 111, two protrusions 111a are provided around each through hole 112a, and they are symmetrically distributed about the through hole 112a. Figure 7A In the middle, the flange plate 112 has three through holes 112, therefore three pairs of protrusions 111a are provided. Figure 7B In the middle, the flange plate 112' has 4 through holes 112', and therefore 4 pairs of protrusions 111a' are provided.

[0035] Figure 8 A cross-sectional view of the brake motor 100 according to an embodiment of the present invention is shown. As shown, a bearing housing 120 is installed in the housing body 110, a bearing 140 is installed in the bearing housing 120 (e.g., with a clearance fit), and a hollow shaft 150 is installed in the inner ring of the bearing 140. A lock nut 160 is screwed onto the bearing housing 120 from above to help secure the bearing 140. Furthermore, a stator 170 is installed in the housing body 110, and a rotor 180 is installed in the hollow shaft 150.

[0036] The brake motor 100 is connected to the brake pump 200 via a plug 130 for control, and the housing body 110 is fixed to the brake pump 200 by screws 190.

[0037] In this invention, the main body of the casing, where structural requirements are not high, is made of deep-drawn material, while the bearing housing is machined separately and then fixed by press fitting and welding. Compared to die-cast aluminum casings, this reduces costs while still meeting the functional requirements for fixed bearings and simplifies the stator fixing method. Furthermore, although the shell wall of the deep-drawn casing is thinner, the overall strength of the casing is improved by incorporating reinforcing structures on the casing body.

[0038] Through the above description of the disclosed embodiments, those skilled in the art will be able to implement or use the present invention. Various modifications to these embodiments will also be apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein, but covers the widest scope consistent with the principles disclosed herein.

Claims

1. A housing for a brake motor, comprising a hollow housing body and a bearing housing, the bearing housing being assembled within the housing body, characterized in that, The casing body is constructed as a deep-drawn shell.

2. The housing for braking an electric machine according to claim 1, characterized in that, The top inner wall of the housing is fixed to the top of the bearing seat.

3. The housing for braking an electric machine according to claim 1 or 2, characterized in that, The housing body includes a main body, a neck, and a transition section between the main body and the neck.

4. The housing for braking an electric motor according to claim 3, characterized in that, The outer wall of the bearing housing has a radially outwardly extending bearing housing flange that abuts against the junction between the neck and the transition section of the housing body.

5. The housing for braking an electric motor according to claim 1 or 2, characterized in that, The bearing housing has a bearing flange that extends radially inward.

6. The housing for braking an electric motor according to claim 1 or 2, characterized in that, The upper part of the inner wall of the bearing housing is provided with internal threads, and the housing also includes a lock nut with external threads, so that the lock nut is threadedly engaged with the bearing housing.

7. The housing for braking an electric motor according to claim 3, wherein The outer circumferential surface of the transition section has an axially extending concave portion that is evenly distributed along the circumferential direction. The concave portion has an arc-shaped structure and a rounded transition with the outer circumferential surface of the transition section between the concave portions.

8. The housing for braking an electric motor according to claim 3, characterized in that, The transition section comprises several segments along the axial direction, with rounded corners between each segment.

9. The housing for braking an electric motor according to claim 3, characterized in that, The housing body has a flange plate at the end of the main body away from the constriction neck. The flange plate has through holes, and two protrusions are provided around each through hole at the junction of the flange plate and the main body, which are symmetrically distributed about the through holes.

10. The housing for a brake motor according to claim 2, characterized in that, The top inner wall of the housing body is welded to the top of the bearing seat; or riveted together. The upper part of the outer wall of the bearing seat is provided with external threads, and the housing body is provided with corresponding internal threads, so that the bearing seat and the housing body are fixed together by screw connection.

11. A braking motor, characterized by The invention includes a housing for a brake motor according to any one of claims 1-10, and includes a stator and a hollow shaft, wherein the stator is mounted in the housing, a bearing is mounted in a bearing housing, and the hollow shaft is mounted in the inner ring of the bearing.

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