Electronic mechanical brake, MGU assembly and motor terminal sealing element

Abstract

The utility model discloses an electronic mechanical brake, an MGU assembly and a motor terminal sealing element. The MGU assembly comprises a motor and a PCBA (Printed Circuit Board Assembly), the motor is provided with a motor cavity, and a motor terminal is arranged in the motor cavity; the PCBA assembly comprises a PCBA shell with a PCBA cavity, the PCBA shell is fixedly connected with the motor end cover, and the motor terminal penetrates through the motor end cover and the PCBA shell and extends into the PCBA cavity; a sealing element is arranged between the PCBA shell and the connecting end face of the motor end cover, the sealing element comprises a sealing element body, the sealing element body is provided with a through hole for a motor terminal to penetrate through, the sealing element further comprises first flanges, and the first flanges are arranged on the two opposite end faces of the sealing element body respectively. The first flange forms a first annular structure on the end face of the sealing piece body along the outer contour of the sealing piece body, and the through hole is located in the first annular structure. The MGU assembly is simple in structure, convenient to assemble and good in sealing effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle brake equipment technical field, concretely relates to an electronic mechanical brake, MGU assembly and motor terminal sealing element. BACKGROUND

[0002] The electronic mechanical brake belongs to one kind of wire control brake, and its response is rapid and performance is superior, compared with the traditional hydraulic brake system, the hydraulic oil pipeline and brake wheel cylinder and other components are omitted, the environmental pollution problem of hydraulic oil is solved, and the brake system structure is simplified, which is beneficial to optimizing the chassis structure arrangement of the vehicle.

[0003] The electronic mechanical brake generally includes a bracket assembly, a caliper body assembly disposed on the bracket assembly, and an MGU assembly disposed on the caliper body assembly. The MGU assembly includes a motor, a speed reduction mechanism, and a PCBA assembly. The motor includes a motor terminal that passes through a motor end cover and a housing of the PCBA assembly. In the prior art, radial sealing structures are provided between the motor terminal and the motor end cover and between the motor terminal and the housing of the PCBA assembly for sealing. The radial sealing structures can be sealing glue or O-shaped sealing rings. This sealing structure requires two radial sealing structures on each terminal, making the assembly process complex and costly, but the sealing effect is poor. SUMMARY

[0004] The utility model aims at the deficiency in the prior art and provides an MGU assembly. The sealing element structure of the motor terminal in the MGU assembly is simple, easy to assemble, and has good sealing effect.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] An MGU assembly includes:

[0007] A motor includes a motor housing and a motor end cover fixedly disposed on the motor housing. A motor cavity is formed between the motor housing and the motor end cover. The motor further includes a motor terminal disposed in the motor cavity.

[0008] A PCBA assembly includes a PCBA housing having a PCBA cavity and a PCBA board disposed in the PCBA cavity. The PCBA housing is fixedly connected with the motor end cover. The motor terminal sequentially passes through the motor end cover and the PCBA housing to extend into the PCBA cavity and is connected with the PCBA board.

[0009] A sealing member made of an elastic material is arranged between the connecting end faces of the PCBA shell and the motor end cover, the sealing member comprises a sealing member body, the opposite end faces of the sealing member body are respectively arranged towards the PCBA shell and the motor end cover, a through hole for the motor terminal to pass through is arranged on the sealing member body, the sealing member further comprises a first flange, the first flange is respectively arranged on the opposite end faces of the sealing member body and protrudes away from the sealing member body along the thickness direction of the sealing member body, the first flange extends along the outer contour of the sealing member body on the end face of the sealing member body to form a first annular structure, and the through hole is located in the first annular structure.

[0010] In some embodiments, a plurality of motor terminals are arranged, a plurality of through holes corresponding to the motor terminals are arranged one by one, the sealing member further comprises a second flange, the second flange is respectively arranged between every two adjacent through holes, the second flange is located in the first annular structure and separates the first annular structure into a plurality of second annular structures, and each through hole is located in a second annular structure.

[0011] In some embodiments, the plurality of through holes are arranged at intervals along the length direction of the sealing member body, each second flange extends along the width direction of the sealing member body, and the two ends of the second flange extend to intersect with the first flange respectively.

[0012] In some embodiments, a plurality of second flanges are arranged, and the second flanges are arranged in parallel.

[0013] In some embodiments, the height of the first flange and the second flange in the thickness direction of the sealing member body is the same.

[0014] In some embodiments, a transition fit is adopted between the through hole and the motor terminal.

[0015] In some embodiments, a containing groove is arranged on one of the PCBA shell and the motor end cover, the depth of the containing groove is less than the thickness of the sealing member body, and the sealing member is arranged in the containing groove; when the PCBA shell and the motor end cover are not connected, a gap is formed between the sealing member and the containing groove.

[0016] In some embodiments, the material of the sealing member is nitrile rubber or EPDM.

[0017] The utility model further provides an electronic mechanical brake, the electronic mechanical brake has the MGU assembly as any above.

[0018] The utility model discloses still provide a kind of electronic terminal sealing piece, it is made of elastic material, the sealing piece includes sealing piece body, the sealing piece body is provided with the through hole for motor terminal to pass through, the sealing piece further includes first flange, the first flange is respectively arranged on the opposite two end surfaces of the sealing piece body, and it is protruded from the end surface of the sealing piece body to the direction of the sealing piece body away along the thickness direction of the sealing piece body, the first flange forms first annular structure on the end surface of the sealing piece body along the external contour of the sealing piece body, the through hole is located in the first annular structure;

[0019] The motor terminal is provided with multiple, the through hole is provided with multiple one-to-one corresponding with the motor terminal, the sealing piece further includes second flange, the second flange is respectively arranged between every adjacent two through holes, and the second flange is located in the first annular structure, and the first annular structure is separated into multiple second annular structures, and every through hole is located in one second annular structure.

[0020] Due to the use of the above technical scheme, compared with the prior art, the utility model has the following advantages: in the MGU assembly of the utility model, only one end surface sealing piece between the connecting end surface of PCBA shell and motor end cover can seal the connecting parts of each motor terminal and motor end cover, each motor terminal and PCBA shell, the sealing structure is simple, so that the assembly process is also simple, and the cost is low. Moreover, in addition to achieving sealing effect through elastic deformation of the sealing piece body itself, the first flange on the sealing piece body can further block the oil in the speed reduction mechanism cavity, prevent oil from entering the first annular structure, and enter the motor cavity and PCBA cavity through the through hole, so as to improve the sealing effect. BRIEF DESCRIPTION OF DRAWINGS

[0021] ATTACHED Figure 1 It is the top view schematic diagram of the MGU assembly of the embodiment (remove speed reduction mechanism);

[0022] ATTACHED Figure 2 It is the exploded schematic diagram of the MGU assembly of the embodiment (remove speed reduction mechanism); Figure 1 It is the sectional view schematic diagram along A-A line;

[0023] ATTACHED Figure 3 It is the exploded schematic diagram of the MGU assembly of the embodiment (remove speed reduction mechanism);

[0024] ATTACHED Figure 4 It is the three-dimensional schematic diagram of the sealing piece of the embodiment;

[0025] ATTACHED Figure 5 It is the top view schematic diagram of the sealing piece of the embodiment;

[0026] ATTACHED Figure 6 It is theFigure 5 Schematic view of a cross-section along line A-A.

[0027] Wherein: 1, motor; 11, motor housing; 12, motor end cover; 13, motor cavity; 14, motor shaft; 15, rotor; 16, stator coil; 17, busbar; 18, motor terminal; 2, PCBA assembly; 21, PCBA housing; 22, PCBA board; 23, PCBA cavity; 3, speed reduction mechanism cavity; 4, sealing element; 41, sealing element body; 411, upper end face; 412, lower end face; 42, first flange; 43, second flange. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more apparent, understandable and easy to understand, the present application will be described in detail below with reference to the drawings and specific embodiments. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0029] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application.

[0030] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0031] In the utility model, unless another definite provision and limitation, the terms "mount", "connect", "fix", and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless another definite limitation. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly contacted through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0033] It should be noted that when an element is referred to as "fixed to" or "provided to" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only embodiment.

[0034] The electronic mechanical brake of the utility model includes support assembly, caliper body assembly arranged on the support assembly and MGU assembly arranged on the caliper body assembly.

[0035] As shown in Figures 1-3 MGU assembly includes motor 1, PCBA assembly 2 and speed reduction mechanism.

[0036] Motor 1 includes motor housing 11 and motor end cover 12, motor housing 11 is of cylindrical structure, motor end cover 12 is fixedly arranged at the open end of the cylindrical structure, and motor cavity 13 is formed between motor housing 11 and motor end cover 12.

[0037] Motor 1 further includes motor shaft 14, rotor 15 and stator coil 16, motor shaft 14, rotor 15 and stator coil 16 are all arranged in motor cavity 13, and a plurality of motor terminals 18 are provided on each outgoing head of stator coil 16 after busbar 17, motor terminals 18 are located in motor cavity 13 and extend to the outside of motor cavity 13 through motor end cover 12.

[0038] The PCBA assembly 2 comprises a PCBA shell 21 and a PCBA board 22. The PCBA shell 21 has a PCBA cavity 23, and the PCBA board 22 is arranged in the PCBA cavity 23. The PCBA shell 21 is fixedly connected with the motor end cover 12.

[0039] A speed reduction mechanism cavity 3 is formed between the PCBA shell 21 and the motor end cover 12, and a speed reduction mechanism (not shown in the figure) is arranged in the speed reduction mechanism cavity 3. The motor shaft 14 extends into the speed reduction mechanism cavity 3 through the motor end cover 12 and is connected with the speed reduction mechanism.

[0040] The motor terminal 18 extends into the PCBA cavity 23 after sequentially passing through the motor end cover 12 and the PCBA shell 21, and is connected with the PCBA board 22, so as to realize the electrical connection between the motor 1 and the PCBA assembly 2.

[0041] Along the extension path of the motor terminal 18, the connecting end faces between the PCBA shell 21 and the motor end cover 12 are communicated with the speed reduction mechanism cavity 3. A sealing element 4 is arranged between the connecting end faces of the PCBA shell 21 and the motor end cover 12, and the motor terminal 18 passes through the sealing element 4. The sealing element 4 is an end face sealing element, and the connecting parts between the motor terminal 18 and the motor end cover 12 and between the motor terminal 18 and the PCBA shell 21 can be sealed through the sealing element 4, so as to prevent the oil in the speed reduction mechanism cavity 3 from entering the motor cavity 13 and the PCBA cavity 23, as shown in Figure 2

[0042] Specifically, as shown in Figures 4-6 The sealing element 4 comprises a sealing element body 41, and the opposite end faces of the sealing element body 41 are arranged towards the PCBA shell 21 and the motor end cover 12, i.e. the upper end face 411 of the sealing element body 41 is arranged towards the PCBA shell 21, and the lower end face 412 is arranged towards the motor end cover 12.

[0043] The sealing element body 41 is provided with a through hole 413 penetrating the upper and lower end faces of the sealing element 413. The through hole 413 is matched with the motor terminal 18, and the motor terminal 18 is arranged in the through hole 413. The through hole 413 is provided with a plurality of through holes corresponding to the motor terminal 18.

[0044] The transition fit between the motor terminal 18 and the through hole 413 can correct the positional deviation of the motor terminal 18, so as to better control the positional deviation of the motor terminal 18 and prevent the deformation of the motor terminal 18, so that the motor terminal 18 is more easily connected with the PCBA board 22.

[0045] ​The sealing member 4 further comprises a first flange 42 arranged on the upper end face 411 and the lower end face 412 of the sealing member body 41 respectively and protruding away from the sealing member body 41 along the thickness direction of the sealing member body 41. The first flange 42 extends along the outer contour of the sealing member body 41 on the upper end face 411 and the lower end face 412 of the sealing member body 41 to form a first annular structure, and is arranged close to the outer contour of the sealing member body 41 to surround each through hole 413 within the first annular structure.

[0046] The sealing member 4 further comprises a second flange 43 arranged between each two adjacent through holes 413 respectively, and the second flange 43 is located within the first annular structure and separates the first annular structure into a plurality of second annular structures, and each through hole 413 is located within one second annular structure.

[0047] In this embodiment, the plurality of through holes 413 are arranged at intervals along the length direction of the sealing member body 41, and each second flange 43 extends along the width direction of the sealing member body 41, and the two ends of the second flange 43 extend to the intersection with the first flange 42 respectively. There are a plurality of second flanges 43, and preferably each second flange 42 is arranged in parallel.

[0048] The height of the first flange 42 and the second flange 43 in the thickness direction of the sealing member body 41 is the same.

[0049] The arrangement of the first flange 42 and the second flange 43 can further block the oil in the speed reduction mechanism cavity 3, avoid the oil entering the first annular structure and the second annular structure, and thus entering the motor cavity 13 and the PCBA cavity 23 along the through hole 413, and can further improve the sealing effect of the sealing member 4.

[0050] The sealing member 4 is made of an elastic material, and specifically, the material of the sealing member 4 can be nitrile rubber or EPDM.

[0051] One of the PCBA shell 21 and the motor end cover 12 is provided with a receiving groove 121, and the sealing member 4 is arranged in the receiving groove 121 to limit the sealing member 4. The depth of the receiving groove 121 is less than the thickness of the sealing member body 41, so that when the PCBA shell 21 and the motor end cover 12 are connected, the sealing member 4 can be compressed to elastically deform. In this embodiment, the receiving groove 121 is arranged on the motor end cover 12, as shown in Figure 3

[0052] ​When the PCBA shell 21 and the motor end cover 12 are not connected, the sealing element 4 is in a free state in the accommodating groove 121, and a gap exists between the sealing element 4 and the accommodating groove 121, and the gap value is determined according to the elastic deformation amount of the sealing element 4 after the PCBA shell 21 and the motor end cover 12 are connected.

[0053] When the PCBA shell 21 and the motor end cover 12 are connected, the sealing element 4 is compressed and elastically deformed due to the pressure of the PCBA shell 21 and the motor end cover 12, so as to achieve the effect of sealing the speed reduction mechanism cavity 3, so as to prevent the oil liquid in the speed reduction mechanism cavity 3 from entering the motor cavity 13 and the PCBA cavity 23.

[0054] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and to implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. An MGU assembly characterized by: The MGU assembly comprises: a motor, comprising a motor housing and a motor end cover fixedly arranged on the motor housing, a motor cavity being formed between the motor housing and the motor end cover, the motor further comprising motor terminals arranged in the motor cavity; a PCBA assembly, comprising a PCBA housing with a PCBA cavity and a PCBA board arranged in the PCBA cavity, the PCBA housing being fixedly connected with the motor end cover, the motor terminals sequentially penetrating through the motor end cover and the PCBA housing into the PCBA cavity and being connected with the PCBA board; a sealing member made of elastic material, the sealing member being arranged between the connecting end faces of the PCBA housing and the motor end cover, the sealing member comprising a sealing member body, opposite end faces of the sealing member body being respectively arranged towards the PCBA housing and the motor end cover, the sealing member body being provided with through holes for the motor terminals to penetrate through, the sealing member further comprising first flanges, the first flanges being respectively arranged on the opposite end faces of the sealing member body and protruding away from the sealing member body along the thickness direction of the sealing member body, the first flanges extending along the outer contour of the sealing member body on the end faces of the sealing member body to form first annular structures, the through holes being located in the first annular structures.

2. The MGU assembly of claim 1, wherein: The motor terminals are provided in plurality, the through holes are provided in plurality in one-to-one correspondence with the motor terminals, the sealing member further comprises second flanges, the second flanges being respectively arranged between every two adjacent through holes, the second flanges being located in the first annular structures and separating the first annular structures into second annular structures, each through hole being located in a second annular structure.

3. The MGU assembly of claim 2, wherein: The plurality of through holes are arranged at intervals along the length direction of the sealing member body, each second flange extends along the width direction of the sealing member body, and the two ends of the second flange respectively extend to intersect with the first flanges.

4. The MGU assembly of claim 3, wherein: The second flanges are provided in plurality, and each second flange is arranged in parallel.

5. The MGU assembly of claim 2, wherein: The heights of the first flanges and the second flanges in the thickness direction of the sealing member body are the same.

6. The MGU assembly of claim 1, wherein: The through holes and the motor terminals adopt a transition fit.

7. The MGU assembly of claim 1, wherein: One of the PCBA housing and the motor end cover is provided with a receiving groove, the depth of the receiving groove being less than the thickness of the sealing member body, and the sealing member is arranged in the receiving groove; when the PCBA housing and the motor end cover are not connected, there is a gap between the sealing member and the receiving groove.

8. The MGU assembly of claim 1, wherein: The material of the sealing member is nitrile rubber or EPDM.

9. An electromechanical brake characterized by: The MGU assembly has any one of the structures as claimed in claims 1-8.

10. An electronic terminal seal characterized by: The sealing member made of elastic material comprises a sealing member body, a through hole is arranged on the sealing member body for passing through a motor terminal, and a first flange is arranged on the opposite end faces of the sealing member body respectively and protrudes from the end faces of the sealing member body in a direction away from the sealing member body along the thickness direction of the sealing member body, the first flange forms a first annular structure along the outer contour of the sealing member body on the end face of the sealing member body, and the through hole is located in the first annular structure; A plurality of motor terminals are arranged, a plurality of through holes corresponding to the motor terminals are arranged one by one, and a second flange is arranged between every two adjacent through holes respectively, the second flange is located in the first annular structure and separates the first annular structure into a plurality of second annular structures, and each through hole is located in one second annular structure.

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