EPB motor driving assembly

Abstract

The utility model belongs to the technical field of EPB motors, and discloses an EPB motor driving assembly. The driving assembly comprises a shell, a motor and a gear transmission assembly, the shell comprises a shell body and a shell cover, the shell body is provided with a first inner cavity and a second inner cavity, a first positioning structure is integrally formed in the first inner cavity, the shell cover covers the shell body, and a transmission area communicating the first inner cavity with the second inner cavity is formed between the shell cover and the shell body; a second positioning structure is integrally formed at the position, relative to the second inner cavity, of the shell cover; the motor is positioned in the first inner cavity through the first positioning structure; the gear transmission assembly is positioned in the second inner cavity through the second positioning structure and is in transmission connection with the motor through the transmission area. Through the arrangement, a positioning plate, a positioning base and a base plate can be omitted, so that the number of supplied materials is reduced, the assembly process and the overall structure are simplified, the production and manufacturing cost is reduced, the assembly efficiency is improved, and meanwhile, the transmission precision and the use reliability can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to EPB motor technical field especially relates to a kind of EPB motor drive assembly. BACKGROUND

[0002] At present, automobile gradually develops to the direction of large hub, big caliper, which causes the installation space of other internal parts of vehicle to be limited, and the existing EPB motor drive assembly (such as shown in the figure) generally needs to use positioning plate 1' to position gear box assembly, and positioning base 2' is used to position motor, so that the utilization rate of automobile hub or caliper space is relatively reduced.In addition, the existing EPB motor drive assembly has many and complex internal parts, and has large assembly error and instability, so that the use reliability is low. Figure 1

[0003] Therefore, an EPB motor drive assembly is needed to solve the problems existing in the prior art. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of EPB motor drive assembly, which can reduce the number of parts used, so as to simplify structure, improve assembly efficiency, improve transmission accuracy and use reliability, while assembly process and production cost can be reduced.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] EPB motor drive assembly, comprising:

[0007] Shell, including shell and shell cover, the shell has first inner cavity and second inner cavity, and is integrally formed with first positioning structure at the first inner cavity, the shell cover is arranged on the shell, and the transmission area that is communicated with the first inner cavity and the second inner cavity is formed between the shell cover and the second inner cavity, the position of the shell cover relative to the second inner cavity is integrally formed with second positioning structure;

[0008] Motor, positioned in the first inner cavity by the first positioning structure;

[0009] Gear transmission assembly, positioned in the second inner cavity by the second positioning structure, and transmission connected with the motor through the transmission area.

[0010] As a preferred, the first positioning structure is flat plate, and is arranged around the axis of the first inner cavity, and first positioning hole is opened through the first positioning structure along the axis of the first inner cavity, and the output shaft of the motor is rotatably arranged in the first positioning hole.

[0011] ​Preferably, the second positioning structure is in a columnar shape and protrudes from the inner side of the shell cover, and a second positioning hole is formed in the end of the second positioning structure, and the rotating shaft of the gear transmission assembly is rotatably arranged in the second positioning hole.

[0012] Preferably, a spacing part is arranged between the first inner cavity and the second inner cavity, and a third positioning structure is arranged on the shell cover and connected to the spacing part.

[0013] Preferably, a third positioning hole is formed in the spacing part, and the third positioning structure is in a columnar shape and protrudes from the inner side of the shell cover, and the third positioning structure is limitingly arranged in the third positioning hole.

[0014] Preferably, the third positioning structure is a stepped columnar structure and includes a base column end and a guide end with cross-sectional areas decreasing in sequence, and the guide end is arranged closer to the third positioning hole than the base column end.

[0015] Preferably, a plurality of first supporting rib plates are fixed between the second positioning structure and the shell cover along the circumferential direction of the second positioning structure.

[0016] And, a plurality of second supporting rib plates are fixed between the third positioning structure and the shell cover along the circumferential direction of the third positioning structure.

[0017] Preferably, a sunken groove is formed in the shell cover, the second positioning structure protrudes from the groove bottom of the sunken groove, and the first supporting rib plates are arranged in the sunken groove.

[0018] Preferably, the shell further includes end covers, and the shell body is detachably connected to the end covers and the shell cover at both ends of the first inner cavity.

[0019] Preferably, a fourth positioning structure protrudes from the edge of the shell cover, and the fourth positioning structure is clamped between the gear transmission assembly and the inner side wall of the shell body.

[0020] The EPB motor drive assembly has the following advantages: the first positioning structure and the second positioning structure can realize positioning and installation of the motor and the gear transmission assembly, the positioning plate, the positioning base and the gasket plate for buffering the positioning plate and the shell cover can be omitted, the number of incoming materials is reduced, the assembly process and the overall structure are simplified, the production cost is reduced, the assembly efficiency is improved, the transmission precision and the use reliability are effectively improved, and the practicability is greatly enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1is a structural section view of an existing EPB motor drive assembly;

[0022] Figure 2 is a structural section view of an EPB motor drive assembly provided by an embodiment of the present utility model;

[0023] Figure 3 is a structural exploded view of an EPB motor drive assembly provided by an embodiment of the present utility model;

[0024] Figure 4 is a structural schematic view of a shell provided by an embodiment of the present utility model;

[0025] Figure 5 is a structural schematic view of a shell cover provided by an embodiment of the present utility model;

[0026] Figure 6 is a front view of the shell cover provided by an embodiment of the present utility model.

[0027] In the drawings:

[0028] 1', positioning plate; 2', positioning base; 3', outer end cover; 4', pad plate;

[0029] 100, motor; 110, transmission shaft; 200, gear transmission assembly; 210, rotating shaft;

[0030] 1, outer shell; 11, shell; 1101, first inner cavity; 1102, second inner cavity; 1103, transmission area; 111, first positioning structure; 1111, first positioning hole; 112, spacing part; 1121, positioning block; 11211, third positioning hole; 12, shell cover; 121, second positioning structure; 1211, second positioning hole; 122, third positioning structure; 1221, base column end; 1222, guide end; 123, first support rib plate; 124, second support rib plate; 125, sink; 126, fourth positioning structure; 13, end cover. DETAILED DESCRIPTION

[0031] The present utility model will be further described in detail below in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, and not to limit the present utility model. In addition, it should be noted that, in order to facilitate the description, only the parts related to the present utility model are shown in the drawings, not all the structures.

[0032] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two element's interaction relationship.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0033] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional feature between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0034] In the description of the embodiment, the orientation or position relationship of the terms "on", "under", "right", "left" and the like is based on the orientation or position relationship shown in the drawing, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0035] The technical scheme provided by the utility model is introduced below in combination with the drawings and specific embodiments.

[0036] As shown in the accompanying Figure 2 To the accompanying Figure 6 The embodiment provides an EPB motor driving assembly, which comprises a shell 1, a motor 100 and a gear transmission assembly 200.The motor 100 and the gear transmission assembly 200 are arranged in the shell 1 to protect the motor 100 and the gear transmission assembly 200 by the shell 1, and the motor 100 is drivingly connected to the gear transmission assembly 200 to transmit the generated power to the brake system through the gear transmission assembly 200, so that the parking brake function is realized.The EPB motor driving assembly is suitable for small, medium, medium-large cars and SUV models, and the utility model is not limited to this.

[0037] In combination Figure 2 And Figure 3As shown, the above-mentioned housing 1 comprises a shell 11 and a shell cover 12, wherein the shell 11 is in an L-shaped structure and has a first inner cavity 1101 and a second inner cavity 1102, the first inner cavity 1101 is located at the bottom of the second inner cavity 1102, the first inner cavity 1101 is used to accommodate the motor 100 in the embodiment, and the second inner cavity 1102 is used to accommodate the gear transmission assembly 200; the shell cover 12 is sealed and covers the shell 11, and a transmission area 1103 is formed between the shell cover 12 and the shell 11 to communicate the first inner cavity 1101 and the second inner cavity 1102, so that the motor 100 located in the first inner cavity 1101 and the gear transmission assembly 200 located in the second inner cavity 1102 can be drivingly connected through the transmission area 1103.

[0038] Reference Figure 1 As shown, in order to realize the positioning of the gear transmission assembly 200 and the motor 100 and ensure the accuracy and reliability of the EPB system, the prior art often uses a positioning plate 1' to realize the positioning installation of the gear transmission assembly 200 by sleeving the positioning plate 1' on the rotating shaft 210 of the gear transmission assembly 200 and clamping the positioning plate 1' between the gear transmission assembly 200 and the outer end cover 3'. In addition, the prior art also uses a positioning base 2' to realize the positioning installation of the motor 100 by sleeving the positioning base 2' on the transmission shaft 110 of the motor 100 and clamping the positioning base 2' between the positioning plate 1' and the motor 100. However, this positioning method undoubtedly increases the number of incoming materials during assembly, making the assembly process complicated and the structure complex, affecting the assembly efficiency, and the transmission accuracy and use reliability still have limitations, and the production cost cannot be effectively reduced.

[0039] In order to solve the above-mentioned problems, in the EPB motor drive assembly provided in the embodiment, the first positioning structure 111 is integrally formed at the first inner cavity 1101, the motor 100 is positioned in the first inner cavity 1101 through the first positioning structure 111, the second positioning structure 121 is integrally formed on the shell cover 12 relative to the position of the second inner cavity 1102, and the gear transmission assembly 200 is positioned in the second inner cavity 1102 through the second positioning structure 121, that is, the first positioning structure 111 realizes the positioning function of the positioning base 2' to the motor 100, and the second positioning structure 121 realizes the positioning function of the positioning plate 1' to the gear transmission assembly 200, so that the positioning plate 1' and the positioning base 2' are omitted. Figure 2 , Figure 4 and Figure 5 As shown, the first positioning structure 111 is integrally formed at the first inner cavity 1101, the motor 100 is positioned in the first inner cavity 1101 through the first positioning structure 111, the second positioning structure 121 is integrally formed on the shell cover 12 relative to the position of the second inner cavity 1102, and the gear transmission assembly 200 is positioned in the second inner cavity 1102 through the second positioning structure 121, that is, the first positioning structure 111 realizes the positioning function of the positioning base 2' to the motor 100, and the second positioning structure 121 realizes the positioning function of the positioning plate 1' to the gear transmission assembly 200, so that the positioning plate 1' and the positioning base 2' are omitted.

[0040] Specifically, one of the embodiments of the present embodiment is that, as shown in Figure 4As shown, the first positioning structure 111 is flat and extends around the axis of the first inner cavity 1101, and a first positioning hole 1111 is formed through the first positioning structure 111 along the axis of the first inner cavity 1101, and the output shaft of the motor 100 is rotatably arranged in the first positioning hole 1111. Thus, the first positioning hole 1111 can position the motor 100 by sleeving the output shaft of the motor 100, and will not affect the transmission of the motor 100. Figure 5 As shown, the second positioning structure 121 is columnar and protrudes from the inner side of the shell cover 12, and a second positioning hole 1211 is formed in the end of the second positioning structure 121, and the rotating shaft 210 of the gear transmission assembly 200 is rotatably arranged in the second positioning hole 1211, thereby achieving positioning and installation of the gear transmission assembly 200.

[0041] Thus, by arranging the first positioning structure 111 and the second positioning structure 121, the motor 100 and the gear transmission assembly 200 can be positioned and installed, and the positioning plate 1', the positioning base 2', and the pad plate 4' for buffering the positioning plate 1' and the shell cover 12 can be omitted, thereby reducing the number of parts, simplifying the assembly process and the overall structure, reducing production costs, improving assembly efficiency, effectively improving transmission accuracy and use reliability, and greatly enhancing practicality.

[0042] More specifically, referring to Figure 3 As shown, the shell 1 provided by the embodiment further includes an end cover 13, and the shell 11 is detachably connected to the end cover 13 and the shell cover 12 at both ends of the first inner cavity 1101. By the above arrangement, the motor 100 can be conveniently assembled. For example, when assembling the motor 100, the transmission shaft 110 of the motor 100 is inserted into the first inner cavity 1101 in a posture aligned with the first positioning hole 1111, the first positioning hole 1111 is accurately inserted into the first positioning hole 1111 to complete the positioning of the motor 100, and then the end cover 13 is assembled on the shell 11 to clamp and fix the motor 100 between the first positioning structure 111 and the end cover 13, thereby ensuring stability. Compared with the prior art, the shell 1 provided by the embodiment sets the shell 11 and the end cover 13 as a split structure, which can improve the convenience of assembling the motor 100 and improve the demolding precision of the shell 11, thereby preventing defects such as uneven joints at the connection between the shell 11 and the end cover 13 during integral molding, and further ensuring the positioning accuracy of the motor 100.

[0043] In the shell 11, a spacing portion 112 is further arranged between the first inner cavity 1101 and the second inner cavity 1102 to form two circular cavities in annular shape by spacing the first inner cavity 1101 and the second inner cavity 1102. In addition, a third positioning structure 122 is arranged on the shell cover 12 and connected to the spacing portion 112. The third positioning structure 122 can prevent the spacing portion 112 from being compressed and deformed by the gear transmission assembly 200, thereby ensuring that the spacing between the first inner cavity 1101 and the second inner cavity 1102 is fixed, and the structural stability of the entire shell 11 is effectively improved.

[0044] In one embodiment of the present embodiment, as shown in Figure 4 The spacing portion 112 is provided with a positioning block 1121 protruding therefrom, and the positioning block 1121 is provided with a third positioning hole 11211 opening inwardly at an end portion. In addition, the third positioning structure 122 is in the form of a column and protrudes from the inner side of the shell cover 12. The third positioning structure 122 is inserted into the third positioning hole 11211 in a limiting manner, thereby supporting the spacing portion 112 and preventing the spacing portion 112 from being deformed in the direction between the center of the first inner cavity 1101 and the center of the second inner cavity 1102.

[0045] Further, in the present embodiment, the third positioning structure 122 is in the form of a stepped column structure and includes a base column end 1221 and a guide end 1222 having cross-sectional areas that decrease successively. The guide end 1222 is arranged closer to the third positioning hole 11211 than the base column end 1221. When assembling the shell 11 and the shell cover 12, the thinner guide end 1222 of the third positioning structure 122 can be accurately inserted into the third positioning hole 11211, thereby playing a guiding and positioning role and helping to avoid inaccurate positioning due to assembly errors and improve positioning accuracy.

[0046] Since the second positioning structure 121 and the third positioning structure 122 protrude from the shell cover 12, stress concentration may occur at the connection between the second positioning structure 121 and the shell cover 12 and at the connection between the third positioning structure 122 and the shell cover 12, thereby affecting the stability of the second positioning structure 121 and the third positioning structure 122. In order to avoid the above phenomenon, in the present embodiment, as shown in Figure 6As shown, a plurality of first support rib plates 123 are fixedly connected between the second positioning structure 121 and the shell cover 12 along the circumferential direction of the second positioning structure 121; a plurality of second support rib plates 124 are fixedly connected between the third positioning structure 122 and the shell cover 12 along the circumferential direction of the third positioning structure 122. The first support rib plates 123 and the second support rib plates 124 can reduce the stress concentration phenomenon of the second positioning structure 121 and the third positioning structure 122, effectively improve the connection strength and stability between the second positioning structure 121 and the shell cover 12 and between the third positioning structure 122 and the shell cover 12, and enhance the use durability of the second positioning structure 121 and the third positioning structure 122.

[0047] Preferably, the first support rib plates 123 and the second support rib plates 124 are respectively provided with four, to meet the stability requirements of the second positioning structure 121 and the third positioning structure 122 in actual working conditions.

[0048] Continuing to refer to Figure 6 As shown, the shell cover 12 of the embodiment further has a sunken groove 125, the groove bottom of the sunken groove 125 is protrudingly provided with the second positioning structure 121, and the first support rib plate 123 is arranged in the sunken groove 125. Since the surface of the gear transmission assembly 200 facing the shell cover 12 and the surface of the motor 100 facing the shell cover 12 are not in the same vertical plane, the surface of the gear transmission assembly 200 facing the shell cover 12 is closer to the shell cover 12 than the surface of the motor 100 facing the shell cover 12, so the thickness of the shell cover 12 is mainly determined by the protruding length of the second positioning structure 121. If the sunken groove 125 is not arranged, the protruding length of the second positioning structure 121 will be longer, thereby causing the thickness of the shell cover 12 to be larger, the transmission area 1103 between the shell cover 12 and the shell 11 to be too large, and the internal space to be wasted. Therefore, by arranging the first support rib plate 123 in the sunken groove 125, the length of the second positioning structure 121 can be effectively reduced, thereby the thickness of the entire shell cover 12 can be reduced, and the situation that the transmission area 1103 is too large to cause space waste can be avoided.

[0049] Optionally, the edge of the shell cover 12 is further protrudingly provided with a fourth positioning structure 126. In one of the embodiments of the embodiment, the fourth positioning structure 126 adopts a circular arc plate shape, and three fourth positioning structures 126 are arranged at the edge of the shell cover 12 around the axis of the gear transmission assembly 200, one fourth positioning structure 126 is arranged at the end of the shell cover 12, and the remaining two fourth positioning structures 126 are arranged at the two sides of the shell cover 12. In combination with Figure 2 and Figure 5As shown, after the assembly of the EPB motor driving assembly is completed, the fourth positioning structure 126 can be inserted and clamped between the gear transmission assembly 200 and the inner side wall of the housing 11 to limit the gear transmission assembly 200 in the radial direction, so that the gear transmission assembly 200 can be further precisely positioned in cooperation with the second positioning structure 121.

[0050] In the description of the present specification, the description referring to the terms "some embodiments", "other embodiments", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] Obviously, the above embodiments of the present application are only for clear illustration of the present application, and are not a limitation on the embodiments of the present application. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present application. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. An EPB motor drive assembly, characterized by, The utility model relates to a kind of motor drive device, including: Housing (1), including shell (11) and shell cover (12), the shell (11) has first inner cavity (1101) and second inner cavity (1102), and integrally formed with first positioning structure (111) at the first inner cavity (1101), the shell cover (12) is covered in the shell (11), and between them form transmission area (1103) that the first inner cavity (1101) and the second inner cavity (1102) are communicated, the position of the shell cover (12) relative to the second inner cavity (1102) is integrally formed with second positioning structure (121); Motor (100) is positioned in the first inner cavity (1101) by the first positioning structure (111); Gear transmission assembly (200) is positioned in the second inner cavity (1102) by the second positioning structure (121), and is drivingly connected with the motor (100) by the transmission area (1103).

2. The EPB motor drive assembly of claim 1, wherein, The first positioning structure (111) is flat and extends around the axis of the first inner cavity (1101), and a first positioning hole (1111) is formed through the first positioning structure (111) along the axis of the first inner cavity (1101), and the output shaft of the motor (100) is rotatably arranged in the first positioning hole (1111).

3. The EPB motor drive assembly of claim 1, wherein, The second positioning structure (121) is columnar and protrudes from the inner side of the shell cover (12), and a second positioning hole (1211) is formed in the end of the second positioning structure (121), and the rotating shaft (210) of the gear transmission assembly (200) is rotatably arranged in the second positioning hole (1211).

4. The EPB motor drive assembly of claim 3, wherein, A spacing portion (112) is arranged between the first inner cavity (1101) and the second inner cavity (1102), and a third positioning structure (122) is arranged on the shell cover (12), and the third positioning structure (122) is connected to the spacing portion (112).

5. The EPB motor drive assembly of claim 4, wherein, A third positioning hole (11211) is formed in the spacing portion (112), the third positioning structure (122) is columnar and protrudes from the inner side of the shell cover (12), and the third positioning structure (122) is limitingly arranged in the third positioning hole (11211).

6. The EPB motor drive assembly of claim 5, wherein, The third positioning structure (122) is a stepped columnar structure, including a base column end (1221) and a guide end (1222) with gradually decreasing cross-sectional areas, and the guide end (1222) is closer to the third positioning hole (11211) than the base column end (1221).

7. The EPB motor drive assembly of claim 5, wherein, A plurality of first supporting rib plates (123) are fixedly connected between the second positioning structure (121) and the shell cover (12) in the circumferential direction of the second positioning structure (121). And, a plurality of second supporting rib plates (124) are fixedly connected between the third positioning structure (122) and the shell cover (12) in the circumferential direction of the third positioning structure (122).

8. The EPB motor drive assembly of claim 7, wherein, The shell cover (12) is provided with a sunken groove (125), the groove bottom of the sunken groove (125) is provided with the second positioning structure (121), and the sunken groove (125) is provided with the first supporting rib plate (123).

9. The EPB motor drive assembly of any one of claims 1-8, wherein, The shell (1) further comprises end covers (13), and the shell body (11) is detachably connected with the end covers (13) and the shell cover (12) at two ends of the first inner cavity (1101) respectively.

10. The EPB motor drive assembly of any one of claims 1-8, wherein, The edge of the shell cover (12) is further provided with a fourth positioning structure (126), and the fourth positioning structure (126) is clamped between the gear transmission assembly (200) and the inner side wall of the shell body (11).

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