Power head for an electromechanical brake system and electromechanical brake system

Abstract

The utility model relates to vehicle technical field, specifically disclose the power head for electronic mechanical brake system and electronic mechanical brake system, the power head for electronic mechanical brake system includes casing, retainer, gear group and PCB board, and the casing is provided with working cavity, and the casing includes oppositely arranged first side wall and second side wall, and the second side wall includes first board and second board, the retainer sets up in the working cavity and is fixed with casing, the gear group sets up in one side of retainer and is opposite with first side wall, the PCB board sets up in the other side of retainer and covers part retainer, and the first board is opposite with the PCB board, and the second board is opposite with the retainer not being covered by the PCB board, and the distance of second board from first side wall is less than the distance of first board from first side wall, thereby reduced the interval of second board and first side wall, improved the problem that power head wheel end arrangement space is restrained, makes power head more easily arrange in wheel end.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a power head for an electromechanical braking system and an electromechanical braking system. Background Technology

[0002] As automotive chassis electrification deepens, the demand for intelligent chassis technology is increasing. Currently, the braking mechanism at the wheel end of the chassis still primarily uses traditional calipers, which generate braking force through hydraulic transmission. However, since traditional calipers themselves cannot generate braking force and cannot autonomously control the clamping and release of braking force, they cannot meet the requirements of intelligent control. Therefore, the Electromechanical Brake System (EMB) has emerged. It drives the actuator through a power head.

[0003] In the existing technology, when the power head is arranged at the wheel end, due to its large size, there is a problem of limited space and restricted arrangement.

[0004] Therefore, there is an urgent need for a power head for electromechanical braking systems to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a power head for an electromechanical braking system, so as to solve the problem that when the power head is arranged at the wheel end in the related technology, the space for the power head to be arranged at the wheel end is constrained and the arrangement is limited due to its large size.

[0006] On one hand, this utility model provides a power head for an electromechanical braking system, the power head for an electromechanical braking system comprising:

[0007] The housing has a working cavity. The housing includes a first sidewall and a second sidewall disposed opposite to each other. The first sidewall has an input port and an output port communicating with the working cavity. The second sidewall includes a first plate and a second plate.

[0008] A retainer, wherein the retainer is disposed within the working cavity and fixedly connected to the housing;

[0009] A gear set is disposed on one side of the cage and opposite to the first sidewall, with the input end and output end of the gear set opposite to the input port and the output port, respectively;

[0010] A PCB board is disposed on the other side of the retainer and covers part of the retainer. The first plate is opposite to the PCB board, and the second plate is opposite to the retainer not covered by the PCB board. The distance between the second plate and the first sidewall is less than the distance between the first plate and the first sidewall.

[0011] As a preferred technical solution for the power head of an electromechanical braking system, a receiving groove is recessed on one side of the cage, and the opening of the receiving groove is opposite to the first side wall.

[0012] The gear set is disposed within the receiving groove.

[0013] As a preferred technical solution for the power head of an electromechanical braking system, a fixing boss is provided on the other side of the cage, a threaded hole is provided on the fixing boss, and a through hole is provided on the PCB board at the position opposite to the threaded hole;

[0014] It also includes a locking bolt, which passes through the through hole and extends into the threaded hole, and the locking bolt is screwed to the fixing boss.

[0015] As a preferred technical solution for the power head of an electromechanical braking system, a limiting protrusion is provided on the other side of the cage;

[0016] A limiting groove is provided at the position of the second sidewall opposite to the limiting protrusion, and the limiting protrusion is inserted into the limiting groove.

[0017] As a preferred technical solution for the power head of an electromechanical braking system, the first plate is spaced apart from the PCB board, and the second plate abuts against the cage.

[0018] As a preferred technical solution for the power head of an electromechanical braking system, the housing includes a first half-shell and a second half-shell, which are detachably connected to each other and enclose the working cavity. The first sidewall is located in the first half-shell, and the second sidewall is located in the second half-shell.

[0019] As a preferred technical solution for the power head of an electromechanical braking system, the second half-shell is a metal part, and the second half-shell also includes a plurality of heat-conducting protrusions, which are disposed on the first plate and all abut against the PCB board.

[0020] As a preferred technical solution for the power head of an electromechanical braking system, the housing further includes a peripheral wall, which is perpendicular to the first side wall, and the peripheral wall is provided with a cable interface;

[0021] The PCB board includes a board body and a connector connected to the board body. The board body is located on the other side of the retainer, and the connector is inserted into the cable interface.

[0022] As a preferred technical solution for the power head used in an electromechanical braking system, the housing is symmetrically arranged with the line connecting the center of the input port and the center of the output port as the axis of symmetry.

[0023] On the other hand, this utility model provides an electromechanical braking system, including an actuator and a power head for the electromechanical braking system in any of the above-mentioned schemes, wherein the input end of the actuator is connected to the output end of the gear set for transmission.

[0024] The beneficial effects of this utility model are as follows:

[0025] This utility model provides a power head for an electromechanical braking system and an electromechanical braking system. The power head for the electromechanical braking system includes a housing, a cage, a gear set, and a PCB board. The housing has a working chamber and includes a first sidewall and a second sidewall disposed opposite each other. The first sidewall has an input port and an output port communicating with the working chamber. The second sidewall includes a first plate and a second plate. The cage is disposed in the working chamber and fixedly connected to the housing. The gear set is disposed on one side of the cage and opposite the first sidewall, with its input end and output end opposite the input port and output port, respectively. The PCB board is disposed on the other side of the cage and covers part of the cage. The first plate is opposite to the PCB board, and the second plate is opposite to the portion of the cage not covered by the PCB board. The distance between the second plate and the first sidewall is less than the distance between the first plate and the first sidewall. This power head effectively separates the gear set and the PCB board by distributing them on opposite sides of the cage. When the gear set is working, the cage can prevent most of the oil from splashing onto the PCB board, thus avoiding corrosion, short circuits, and thermal runaway of the PCB board due to the oil. At the same time, the size of the PCB board is reduced so that the first board is opposite the PCB board and the second board is opposite the cage not covered by the PCB board. This allows the second board to be lowered relative to the first board by a certain height, making the first and second boards have a stepped structure. This makes it easier to arrange the power head at the wheel end, effectively improving the problem of limited space and arrangement of the power head at the wheel end when the power head of the electromechanical braking system is arranged. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the power head used in the electromechanical braking system in this embodiment of the present invention. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the structure of the power head used in the electromechanical braking system in this embodiment of the present invention. Figure 2 ;

[0028] Figure 3 This is an exploded view of the power head used in the electromechanical braking system in an embodiment of this utility model. Figure 1 ;

[0029] Figure 4 This is an exploded view of the power head used in the electromechanical braking system in an embodiment of this utility model. Figure 2 ;

[0030] Figure 5 This is a schematic diagram of the first half-shell of the power head used in the electromechanical braking system in an embodiment of the present invention.

[0031] Figure 6 This is a schematic diagram of the structure of the second half-shell of the power head used in the electromechanical braking system in an embodiment of this utility model;

[0032] Figure 7 This is a schematic diagram of the structure of the retainer for the power head of the electromechanical braking system in an embodiment of this utility model.

[0033] In the picture:

[0034] 1. Housing; 11. First half-shell; 111. First sidewall; 112. Inlet; 113. Outlet; 12. Second half-shell; 121. Second sidewall; 122. First plate; 123. Second plate; 1231. Limiting groove; 13. Working cavity; 14. Heat-conducting protrusion; 15. Peripheral wall; 151. Cable interface;

[0035] 2. Cage; 21. Receiving groove; 22. Fixing boss; 23. Limiting protrusion; 24. Fixing support;

[0036] 31. Input gear; 32. Intermediate gear; 33. Planetary gear train; 331. Ring gear; 332. Planetary gears; 333. Planet carrier;

[0037] 4. PCB board; 41. Board body; 42. Wiring plug;

[0038] 5. Driver. Detailed Implementation

[0039] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0043] like Figures 1 to 7As shown, this embodiment provides a power head for an electromechanical braking system. The power head includes a housing 1, a cage 2, a gear set, a PCB board 4, and a driver 5. The housing 1 has a working chamber 13 and includes a first sidewall 111 and a second sidewall 121 disposed opposite to each other. The first sidewall 111 has an input port 112 and an output port 113 communicating with the working chamber 13. The second sidewall 121 includes a first plate 122 and a second plate 123. The cage 2 is disposed within the working chamber. The actuator 5 is located inside cavity 13 and is fixedly connected to housing 1. A gear set is disposed on one side of the retainer 2 and opposite to the first sidewall 111. The input and output ends of the gear set are opposite to input port 112 and output port 113, respectively. A PCB board 4 is disposed on the other side of the retainer 2 and covers a portion of the retainer 2. A first plate 122 is opposite to the PCB board 4, and a second plate 123 is opposite to the portion of the retainer 2 not covered by the PCB board 4. The distance between the second plate 123 and the first sidewall 111 is less than the distance between the first plate 122 and the first sidewall 111. The output end of the actuator 5 is connected to the input end of the gear set, and the output end of the gear set is connected to the input end of the actuator in the electromechanical braking system. The PCB board 4 can control the working state of the actuator 5, thereby driving the actuator to work through the gear set.

[0044] Specifically, the size of PCB board 4 is reduced so that the first board 122 is opposite to PCB board 4 and the second board 123 is opposite to the cage 2 not covered by PCB board 4. This causes the second board 123 to sink a certain height relative to the first board 122, so that the first board 122 and the second board 123 form a stepped structure, which is easier to arrange at the wheel end.

[0045] The power head places the gear set and PCB board 4 on both sides of the cage 2, thereby effectively separating the gear set and PCB board 4. When the gear set is working, the cage can prevent most of the oil from splashing onto the PCB board, thus avoiding corrosion, short circuit and thermal runaway of the PCB board by the oil.

[0046] Meanwhile, if either the gear set or the PCB board 4 fails to hold, the cage 2 can prevent the gear set and the PCB board 4 from colliding or interfering with each other, thus avoiding greater damage to the power head.

[0047] Optionally, the gear set includes an input gear 31, an intermediate gear 32, and a planetary gear train 33. The input gear 31, intermediate gear 32, and ring gear 331 are all rotatably mounted on one side of the cage 2 and mesh sequentially. The input gear 31 is the input end of the gear set and is opposite to the input port 112. The driver 5 drives the input gear 31 to rotate. The planet carrier 333 of the planetary gear is opposite to the output port 113 and is connected to the input end of the actuator.

[0048] Optionally, the ring gear 331 of the planetary gear train 33 includes an internal ring gear 331 and an external ring gear 331. The external ring gear 331 meshes with the intermediate gear 32, and the internal ring gear 331 meshes with the planet gears 332 of the planetary gear train 33.

[0049] Optionally, driver 5 is a motor.

[0050] Optionally, a receiving groove 21 is recessed on one side of the retainer 2, and the opening of the receiving groove 21 is opposite to the first side wall 111; the gear set is disposed in the receiving groove 21. In this embodiment, the receiving groove 21 can, on the one hand, block the splashing of oil in the gear set, thereby preventing oil from splashing onto the PCB board; on the other hand, it can protect the gear set. If the PCB board 4 fails to be fixed, the opening of the receiving groove 21 is opposite to the first side wall 111, thus preventing damage to the gear set. Furthermore, when a gear in the gear set is damaged, it can also prevent the damaged parts in the gear set from flying out, thereby preventing damage to the PCB board 4.

[0051] Optionally, a fixing boss 22 protrudes from the other side of the retainer 2. The fixing boss 22 has a threaded hole, and a through hole is provided on the PCB board 4 opposite to the threaded hole. The power head for the electromechanical braking system also includes a locking bolt, which passes through the through hole and extends into the threaded hole, and is screwed to the fixing boss 22. In this embodiment, the locking bolt fixes the PCB board 4 to the fixing boss 22, thereby achieving relative fixation between the PCB board 4 and the retainer 2. At the same time, the fixing boss 22 is located between the retainer 2 and the PCB board 4, thereby achieving the spacing between the retainer 2 and the PCB board 4.

[0052] Optionally, a limiting protrusion 23 is provided on the other side of the retainer 2; a limiting groove 1231 is provided on the second side wall 121 opposite to the limiting protrusion 23, and the limiting protrusion 23 is inserted into the limiting groove 1231. In this embodiment, the limiting protrusion 23 is inserted into the limiting groove 1231, and the groove wall of the limiting groove 1231 limits the limiting protrusion 23 in the plane of the second side wall 121. This setting can further improve the stability of the relative fixation between the retainer 2 and the housing 1.

[0053] Optionally, the limiting groove 1231 can be formed by the second side wall 121 being recessed. In other embodiments, a protruding ring can also be provided on the second side wall 121, and the protruding ring surrounds the limiting groove 1231.

[0054] Optionally, the first plate 122 is spaced apart from the PCB board 4, and the second plate 123 abuts against the retainer 2. In this embodiment, the first plate 122 and the PCB board 4 are spaced apart. This arrangement avoids contact with the electronic components on the PCB board 4, thus preventing collisions or short circuits, and also facilitates heat dissipation for the electronic components on the PCB board 4. The second plate 123 abuts against the retainer 2, which allows the second plate 123 to support the retainer 2.

[0055] Optionally, the housing 1 includes a first half-shell 11 and a second half-shell 12, which are detachably connected to each other and enclose a working cavity 13. A first sidewall 111 is located in the first half-shell 11, and a second sidewall 121 is located in the second half-shell 12. In this embodiment, the first half-shell 11 and the second half-shell 12 are detachably connected to each other, which facilitates the installation of the PCB board 4, the gear set, and the cage 2. Specifically, the first half-shell 11 and the second half-shell 12 are connected by bolts. In other embodiments, the first half-shell 11 and the second half-shell 12 can also be snap-fitted together.

[0056] Optionally, the cage 2 is provided with a plurality of fixed legs 24 in the circumferential direction, and the plurality of fixed legs 24 are fixedly connected to the first side wall 111 by bolts.

[0057] Optionally, the second half-shell 12 is a metal component, and it further includes multiple heat-conducting protrusions 14 disposed on the first plate 122 and all abutting against the PCB board 4. In this embodiment, the heat generated on the PCB board 4 can be dissipated to the second half-shell 12 through the heat-conducting protrusions 14. Since the second half-shell 12 is a metal component, its thermal conductivity is higher, thereby achieving rapid heat dissipation. Optionally, the second half-shell 12 is an aluminum shell.

[0058] Optionally, the housing 1 further includes a peripheral wall 15, which is perpendicular to the first side wall 111, and a cable interface 151 is provided on the peripheral wall 15. The PCB board 4 includes a board body 41 and a connector 42 connected to the board body 41. The board body 41 is located on the other side of the retainer 2, and the connector 42 is inserted into the cable interface 151. In this embodiment, the first side wall 111, the second side wall 121, and the peripheral wall 15 form a working cavity 13. After the electromechanical braking system is installed in the vehicle, the spacing direction of the first side wall 111 and the second side wall 121 is consistent with the vehicle width. The first side wall 111 is opposite to the wheel, so the space between the first side wall 111 and the wheel is small. If the cable interface 151 is located on the first side wall 111, it will be difficult to connect the cable and the cable connector. If it is located on the second side wall 121, it will easily interfere with the vehicle's steering structure. Therefore, the cable interface 151 is located on the peripheral wall 15 of the housing 1, which facilitates the connection of the cable and the connector 42 and avoids interference.

[0059] Optionally, the first half-shell 11 includes a first sidewall 111 and a first circumferential wall arranged around the first sidewall 111, and the second half-shell 12 includes a second sidewall 121 and a second circumferential wall arranged around the second sidewall 121. The first circumferential wall and the second circumferential wall constitute a circumferential wall 15. The cable interface 151 may be located on the first circumferential wall or the second circumferential wall, or may be formed by the first circumferential wall and the second circumferential wall together.

[0060] Optionally, the housing 1 is symmetrically arranged with the line connecting the center of the input port 112 and the center of the output port 113 as the axis of symmetry. In this embodiment, compared with the existing structure where the left wheel corresponds to the left power head and the right wheel corresponds to the right power head, and the structures of the left and right power heads are inconsistent, this arrangement only requires designing a power head for an electromechanical braking system that can be adapted to both the left and right wheels, without distinguishing between the left and right sides, thus improving installation efficiency and reducing design and production costs.

[0061] On the other hand, this utility model provides an electromechanical braking system, including an actuator and a power head for the electromechanical braking system as described above. The input end of the actuator is connected to the output end of the gear set. The actuator is capable of braking the wheels to a stop.

[0062] Optionally, the actuator is a brake caliper.

[0063] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A power head for an electromechanical braking system, characterized in that, include: The housing (1) is provided with a working cavity (13). The housing (1) includes a first side wall (111) and a second side wall (121) disposed opposite to each other. The first side wall (111) is provided with an input port (112) and an output port (113) communicating with the working cavity (13). The second side wall (121) includes a first plate (122) and a second plate (123). A retainer (2) is disposed in the working cavity (13) and fixedly connected to the housing (1); A gear set is disposed on one side of the cage (2) and opposite to the first sidewall (111), with the input end and output end of the gear set opposite to the input port (112) and the output port (113), respectively. A PCB board (4) is disposed on the other side of the retainer (2) and covers part of the retainer (2). The first plate (122) is opposite to the PCB board (4), and the second plate (123) is opposite to the retainer (2) not covered by the PCB board (4). The distance of the second plate (123) from the first sidewall (111) is less than the distance of the first plate (122) from the first sidewall (111).

2. The power head for an electromechanical braking system according to claim 1, characterized in that, The retainer (2) has a recessed receiving groove (21) on one side, and the opening of the receiving groove (21) is opposite to the first side wall (111); The gear set is disposed in the receiving groove (21).

3. The power head for an electromechanical braking system according to claim 1, characterized in that, The other side of the retainer (2) is provided with a fixing boss (22), the fixing boss (22) is provided with a threaded hole, and the PCB board (4) is provided with a through hole at the position opposite to the threaded hole; It also includes a locking bolt, which passes through the through hole and extends into the threaded hole, and the locking bolt is screwed to the fixing boss (22).

4. The power head for an electromechanical braking system according to claim 1, characterized in that, The other side of the retainer (2) is provided with a limiting protrusion (23); A limiting groove (1231) is provided on the second sidewall (121) opposite to the limiting protrusion (23), and the limiting protrusion (23) is inserted into the limiting groove (1231).

5. The power head for an electromechanical braking system according to claim 1, characterized in that, The first plate (122) is spaced apart from the PCB board (4), and the second plate (123) abuts against the retainer (2).

6. The power head for an electromechanical braking system according to claim 5, characterized in that, The housing (1) includes a first half-shell (11) and a second half-shell (12), the first half-shell (11) and the second half-shell (12) are detachably connected to each other and enclose the working cavity (13), the first side wall (111) is located in the first half-shell (11), and the second side wall (121) is located in the second half-shell (12).

7. The power head for an electromechanical braking system according to claim 6, characterized in that, The second half-shell (12) is a metal part. The second half-shell (12) also includes a plurality of heat-conducting protrusions (14). The plurality of heat-conducting protrusions (14) are disposed on the first plate (122) and all abut against the PCB board (4).

8. The power head for an electromechanical braking system according to claim 1, characterized in that, The housing (1) further includes a peripheral wall (15), which is perpendicular to the first side wall (111), and the peripheral wall (15) is provided with a cable interface (151); The PCB board (4) includes a board body (41) and a connector (42) connected to the board body (41). The board body (41) is located on the other side of the retainer (2), and the connector (42) is inserted into the cable interface (151).

9. The power head for an electromechanical braking system according to any one of claims 1-8, characterized in that, With the line connecting the center of the input port (112) and the center of the output port (113) as the axis of symmetry, the housing (1) is symmetrically arranged.

10. An electromechanical braking system, characterized in that, It includes an actuator and a power head for an electromechanical braking system as described in any one of claims 1-9, wherein the input end of the actuator is drively connected to the output end of the gear set.

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