Electronic mechanical brake

Abstract

The utility model discloses an electronic mechanical brake which comprises a caliper body assembly and an MGU assembly, the caliper body comprises a cylinder body and a piston arranged in the cylinder body in an up-down sliding mode, the MGU assembly comprises a motor and a controller assembly arranged on the motor, and the motor comprises a motor shell and a motor shaft. The controller assembly comprises a controller shell and an electrical connection seat arranged on the controller shell, the central axis of the motor shaft and the central axis of the piston form a plane, the electrical connection seat is arranged on the left side and / or the right side of the controller shell, a connection area used for electrical wiring is arranged on the electrical connection seat, and at least the connection area is located behind the plane; the controller shell is further provided with a hollowed-out area, the hollowed-out area is located in front of the plane, the hollowed-out area penetrates through the front end face and the upper end face of the controller shell and the side face, close to the motor, of the controller shell, and the hollowed-out area can cover the motor shell in the left-right direction in the horizontal projection direction. The electronic mechanical brake can adapt to various wheel edge structures.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle brake equipment technical field, concretely relates to an electronic mechanical brake. BACKGROUND

[0002] The electronic mechanical brake belongs to one kind of line 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] With the commercial application development of the electronic mechanical brake becoming mature, the application of the product is gradually transferred from the bench to the real vehicle, and the electronic mechanical brake needs to adapt to various wheel edge structures, and how the product adapts to more wheel edge structures becomes a problem of the current electronic mechanical brake product. UTILITARY MODEL CONTENT

[0004] The utility model aims at the deficiency in the prior art, and provides an electronic mechanical brake capable of adapting to various wheel edge structures.

[0005] To achieve the above object, the utility model adopts the technical scheme that:

[0006] An electronic mechanical brake, comprising a caliper assembly and an MGU assembly arranged on the caliper assembly, the caliper assembly comprising a cylinder body and a piston capable of sliding up and down in the cylinder body, the MGU assembly comprising a motor and a controller assembly arranged on the motor, the motor comprising a motor shell and a motor shaft, the controller assembly comprising a controller shell and an electrical connection seat arranged on the controller shell, the central axis of the motor shaft and the central axis of the piston form a plane, the electrical connection seat is arranged on the left side and / or the right side of the controller shell, the electrical connection seat is provided with a connection area for electrical wiring, and at least the connection area is located behind the plane; the controller shell is further provided with a hollowed-out area, the hollowed-out area is located in front of the plane, the hollowed-out area penetrates the front end face, the upper end face and the side face close to the motor of the controller shell, and in the horizontal projection direction, the hollowed-out area can cover the motor shell in the left-right direction.

[0007] In some embodiments, the maximum length of the hollowed-out area in the left-right direction is greater than half of the length of the controller shell in the left-right direction and less than two-thirds of the length of the controller shell in the left-right direction.

[0008] In some embodiments, the side wall of the hollowed region is a slope obliquely arranged relative to the rear end surface of the controller housing, the slope extending obliquely from the rear of the controller housing forward and away from the side of the motor;

[0009] The rear wall of the hollowed region is arranged parallel to the rear end surface of the controller housing.

[0010] In some embodiments, the controller housing comprises a lower shell and an upper cover fixedly arranged on the lower shell, the hollowed region extends through the upper and lower end surfaces of the upper cover and downward to the lower part of the lower shell.

[0011] In some embodiments, the plane is arranged parallel to the rear end surface of the controller housing.

[0012] In some embodiments, the controller housing comprises a lower shell and an upper cover fixedly arranged on the lower shell, a controller cavity is formed between the lower shell and the upper cover, the controller assembly further comprises a circuit board arranged in the controller cavity and a plurality of electrical chips arranged at intervals on the circuit board, the controller assembly is provided with a heat dissipation structure at a position corresponding to the electrical chips, and the heat dissipation structure is provided with at least one group.

[0013] In some embodiments, the heat dissipation structure comprises a heat dissipation adhesive layer arranged between the electrical chips and the upper cover, the heat dissipation adhesive layer is bonded with the electrical chips and the upper cover respectively, and the heat dissipation adhesive layer is provided with at least one layer.

[0014] In some embodiments, the heat dissipation structure further comprises a recess arranged on the upper cover, the position of the recess corresponds to the position of the heat dissipation adhesive layer, and in the horizontal projection direction, the recess covers the heat dissipation adhesive layer.

[0015] In some embodiments, the motor further comprises a motor end cover fixedly arranged on the motor housing, a motor cavity is formed between the motor housing and the motor end cover, and the motor further comprises a motor terminal arranged in the motor cavity; the controller housing has a controller cavity, the controller assembly further comprises a circuit board arranged in the controller cavity, the motor terminal sequentially penetrates through the motor end cover and the controller housing into the controller cavity and is connected with the circuit board, the motor terminal is provided with a plurality of motor terminals, and the MGU assembly further comprises a sealing member sleeved on each motor terminal respectively, and the sealing member is made of elastic material.

[0016] In some embodiments, the seal includes a plurality of sealing sleeves that are fixedly connected or integrally arranged, each of the sealing sleeves is correspondingly sleeved on one of the motor terminals, and the sealing sleeves extend upward to the controller housing and downward to the motor end cover along the extension direction of the motor terminal. A convex portion protruding toward the outside of the outer circumferential surface of the sealing sleeve is provided on the outer circumference of each sealing sleeve, and the convex portion extends in a ring shape along the outer circumference of the sealing sleeve. The convex portion is respectively arranged at the upper and lower parts of each sealing sleeve, the controller housing is pressed on the convex portion located at the upper part, and the motor end cover is pressed on the convex portion located at the lower part.

[0017] Due to the application of the above-mentioned technical solution, the present invention has the following advantages over the prior art: In the electromechanical brake of the present invention, the connection area of ​​the electrical connector is arranged behind the plane formed by the central axis of the motor shaft and the central axis of the piston. This facilitates overall vehicle layout, optimizes the overall wiring space of the electromechanical brake, and reduces interference between the electromechanical brake and surrounding components. The provision of the hollowed-out area also facilitates overall vehicle layout and reduces interference between the electromechanical brake and surrounding components. These advantages enable the electromechanical brake to adapt to a variety of wheel rim structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attachment Figure 1 is a three-dimensional schematic diagram of the electromechanical brake of this embodiment;

[0019] Attachment Figure 2 is an exploded schematic diagram of the electromechanical brake of this embodiment;

[0020] Attachment Figure 3 is a perspective schematic diagram of the MGU assembly of this embodiment;

[0021] Attachment Figure 4 is a schematic top view of the MGU assembly of this embodiment;

[0022] Attachment Figure 5 is a schematic diagram of the heat dissipation structure of the controller assembly of this embodiment;

[0023] Attachment Figure 6 is a perspective schematic diagram of the MGU assembly of this embodiment when the seal is not connected to the motor terminal;

[0024] Attachment Figure 7 is a bottom view schematic diagram of the MGU assembly of this embodiment;

[0025] Attachment Figure 8 For attachment Figure 7 Schematic cross-sectional view along line AA;

[0026] Attachment Figure 9 For attachmentFigure 8 A local enlarged view of the middle A.

[0027] Wherein: 1, support assembly; 2, clamp body assembly; 21, cylinder body; 3, MGU assembly; 311, motor housing; 312, motor end cover; 313, motor cavity; 314, motor shaft; 315, motor terminal; 321, lower shell; 322, upper cover; 322a, recess; 323, circuit board; 324, electrical chip; 325, controller cavity; 326, electrical connection seat; 326a, connection area; 327, hollow area; 328, heat dissipation adhesive layer; 33, speed reduction mechanism cavity; 34, sealing element; 341, sealing sleeve; 342, protrusion. 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 different ways other than 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 of 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 indicated technical features. 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 other terms should be understood broadly, for example, it can be fixed connection, or it can be detachable connection, or it can be integrated; it can be direct connection, or it can be indirect connection through intermediate medium, or it can be the communication or interaction 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 specific circumstances.

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

[0033] It should be noted that when an element is referred to as "fixed to" or "provided on" 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 implementation.

[0034] As shown in Figure 1 and Figure 2 The utility model discloses an electronic mechanical brake, which comprises a bracket assembly 1, a caliper body assembly 2 arranged on the bracket assembly 1 and an MGU assembly 3 arranged on the caliper body assembly 2.

[0035] The caliper body assembly 2 comprises a cylinder body 21 and a piston arranged in the cylinder body 21 in an axial sliding mode. When the piston slides, brake pads arranged on the bracket assembly 1 are driven to move, so that braking is realized. The MGU assembly 3 is used for driving the piston to slide in the axial direction.

[0036] As shown in Figures 1 to 4 The MGU assembly comprises a motor, a speed reduction mechanism (not shown in the figure) and a controller assembly, and the controller assembly is arranged on the motor.

[0037] The motor comprises a motor shell 311 and a motor end cover 312. The motor shell 311 is in a cylindrical structure, and the motor end cover 312 is fixedly arranged at the opening end of the cylindrical structure. A motor cavity 313 is formed between the motor shell 311 and the motor end cover 312.

[0038] The motor further comprises a motor shaft 314, a rotor and a stator coil, all of which are arranged in the motor cavity 313, and a plurality of motor terminals 315 are arranged on each outgoing terminal of the stator coil after the busbar, the motor terminals 315 are located in the motor cavity 313 and extend to the outside of the motor cavity 313 through the motor end cover 312.

[0039] The controller assembly comprises a controller housing, a circuit board 323 and electrical chips 324.

[0040] The controller housing comprises a lower shell 321 and an upper cover 322, the lower shell 321 is fixedly connected with the motor end cover 312, and the upper cover 322 is fixedly connected on the lower shell 321, and a controller cavity 325 is formed between the lower shell 321 and the upper cover 322.

[0041] The circuit board 323 and the electrical chips 324 are both arranged in the controller cavity 325, and the electrical chips 324 are arranged on the circuit board 323. The electrical chips 324 are provided in plurality, and the plurality of electrical chips 324 are arranged at intervals on the circuit board 323. The electrical chips 324 can be MOSFET, power management chip, driving chip, etc.

[0042] A speed reduction mechanism cavity 33 is formed between the lower shell 321 and the motor end cover 312, and the speed reduction mechanism is arranged in the speed reduction mechanism cavity 33, and the motor shaft 314 extends into the speed reduction mechanism cavity 33 through the motor end cover 312 and is connected with the speed reduction mechanism.

[0043] The motor terminals 315 extend into the controller cavity 325 in sequence after passing through the motor end cover 312 and the lower shell 321, and are connected with the circuit board 323, so as to realize the electrical connection between the motor and the controller assembly.

[0044] The controller assembly further comprises an electrical connection seat 326, which is used for the electrical wiring of the electronic mechanical brake, and the electrical connection seat 326 is arranged on the lower shell 321.

[0045] The central axis of the motor shaft 314 and the central axis of the piston form a plane A, the electrical connection seat 326 is arranged on the left side and / or the right side of the lower shell 321, and a connection area 326a for electrical wiring is arranged on the electrical connection seat 326, and at least the connection area 326a is located behind the plane A, as shown in Figure 4 This is conducive to the arrangement of the whole vehicle, can optimize the wiring harness arrangement space of the electronic mechanical brake, can reduce the interference between the electronic mechanical brake and the surrounding parts, and makes the electronic mechanical brake adapt to various wheel edge structures.

[0046] In this embodiment, the plane A is arranged in parallel with the rear end face of the controller housing. Of course, the plane A can also be slightly inclined at an angle relative to the rear end face of the controller housing.

[0047] At least one group of connection areas 326a is provided. In this embodiment, the electrical connection base 326 is provided on the left side of the lower shell 321, ie, the side away from the motor, and two groups of connection areas 326a are provided on the electrical connection base 326.

[0048] like Figures 1 to 4 As shown, a hollowed-out area 327 is provided on the side of the controller housing near the motor. Hollowed-out area 327 is located in front of plane A. Hollowed-out area 327 extends through the front and upper surfaces of the controller housing, as well as the side surface near the motor. In horizontal projection, hollowed-out area 327 covers motor housing 311 in both left and right directions. The provision of hollowed-out area 327 also facilitates overall vehicle layout and reduces interference between the electronic mechanical brake and surrounding components, making it adaptable to a variety of wheel rim structures.

[0049] In this embodiment, the hollowed-out area 327 passes through the upper and lower end surfaces of the upper cover 322 and extends downward to the lower portion of the lower shell 321 .

[0050] The maximum horizontal length of the hollowed-out area 327 is greater than half the horizontal length of the controller housing, but less than two-thirds of the horizontal length of the controller housing. This prevents interference between the electromechanical brake and surrounding components while also increasing the volume of the controller cavity 325, facilitating the design of the circuit board 323 and the arrangement of the various electrical chips 324 on the circuit board 323. Furthermore, the controller housing's top surface area is relatively large, facilitating heat dissipation from the controller components.

[0051] The sidewalls of hollowed-out area 327 are inclined surfaces arranged at an angle relative to the rear end of the controller housing. The inclined surfaces extend from the rear of the controller housing forward and away from the motor. This inclined surface increases the space in hollowed-out area 327, thereby preventing interference between the electromechanical brake and surrounding components.

[0052] The rear wall of the hollowed-out area 327 is arranged parallel to the rear end surface of the controller housing.

[0053] The controller assembly is provided with a heat dissipation structure, which is provided at a position corresponding to the electrical chip 324. The heat dissipation structure is provided at a position of the electrical chip 324 that generates relatively large amounts of heat, and at least one heat dissipation structure is provided.

[0054] Specifically, such as Figure 5As shown, the heat dissipation structure comprises a heat dissipation adhesive layer 328 arranged between the electrical chip 324 and the upper cover 322, the heat dissipation adhesive layer 328 is bonded with the electrical chip 324 and the upper cover 322 respectively, and the heat dissipation adhesive layer 328 is provided with at least one layer. The heat dissipation adhesive layer 328 connects the electrical chip 324 and the upper cover 322, and conducts the heat generated by the electrical chip 324 in operation to the upper cover 322 for effective heat dissipation, so as to avoid damage of the electrical chip 324 due to high temperature, and improve the reliability and service life of the electrical chip 324.

[0055] As shown in the figure, Figures 1 to 4 The heat dissipation structure further comprises a recess 322a arranged on the upper cover 322, the position of the recess 322a corresponds to the position of the heat dissipation adhesive layer 328, and in the horizontal projection direction, the size of the recess 322a is not less than the size of the heat dissipation adhesive layer 328, that is, the recess 322a can completely cover the heat dissipation adhesive layer 328. The arrangement of the recess 322a makes the thickness of the upper cover 322 at the position of the electrical chip 324 substantially consistent with the thickness of other parts, which is beneficial to the processing of the upper cover 322, and can also avoid that the thickness of the upper cover 322 at the position of the electrical chip 324 is too thick to affect the heat dissipation effect of the heat dissipation structure.

[0056] The motor terminal 315 is provided with a plurality of motor terminals 315, and the MGU assembly 3 further comprises a sealing member 34 sleeved on each motor terminal 315, the sealing member 34 can seal the connection parts between each motor terminal 315 and the motor end cover 312, and between each motor terminal 315 and the lower shell 321, so as to avoid that the oil in the reduction mechanism cavity 33 enters the motor cavity 313 and the controller cavity 325.

[0057] The sealing member 34 is made of elastic material, specifically, the material of the sealing member 34 can adopt nitrile rubber or EPDM.

[0058] As shown in the figure, Figures 6 to 9As shown, the seal 34 comprises a plurality of sealing sleeves 341, each of which is correspondingly sleeved on one motor terminal 315, and the sealing sleeves 341 extend upward to the lower shell 321 and downward to the motor end cover 312 along the extension direction of the motor terminal 315. The outer circumferential surface of each sealing sleeve 341 is provided with a protrusion 342, which protrudes outward from the outer circumferential surface of the sealing sleeve 341 in the radial direction, and the protrusion 342 extends along the outer circumferential surface of the sealing sleeve 341 to form an annular shape, and the protrusion 342 is arranged at the upper part and the lower part of each sealing sleeve 341 respectively, and the two protrusions 342 at the upper part and the lower part form two sealing points respectively, which seal the connection parts between the motor terminal 315 and the lower shell 321 and between the motor terminal 315 and the motor end cover 312 respectively. After the assembly of the MGU assembly 3 is completed, the lower shell 321 is pressed on the protrusion 342 at the upper part, and the motor end cover 312 is pressed on the protrusion 342 at the lower part, so that the seal 34 is compressed and elastically deformed, thereby achieving the effect of sealing the reduction mechanism cavity 33, so as to prevent the oil in the reduction mechanism cavity 33 from entering the motor cavity 313 and the controller cavity 325.

[0059] The plurality of sealing sleeves 341 are fixedly connected or integrally arranged, so that the seal 34 is an integral structure and can be sleeved on the plurality of motor terminals 315 as a whole, which simplifies the assembly process of the MGU assembly 3 and facilitates the production and manufacturing of the MGU assembly 3.

[0060] 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 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 electromechanical brake comprising a caliper assembly and an MGU assembly disposed on the caliper assembly, characterized in that: The caliper body includes a cylinder body and a piston that can slide up and down in the cylinder body, the MGU assembly includes a motor and a controller component arranged on the motor, the motor includes a motor housing and a motor shaft, the controller component includes a controller housing and an electrical connection seat arranged on the controller housing, the central axis of the motor shaft and the central axis of the piston form a plane, the electrical connection seat is arranged on the left and / or right side of the controller housing, and a connection area for electrical wiring is provided on the electrical connection seat, at least the connection area is located behind the plane; a hollow area is also provided on the controller housing, and the hollow area is located in front of the plane, and the hollow area passes through the front end face, upper end face and a side face close to the motor of the controller housing, and in the horizontal projection direction, the hollow area can cover the motor housing in the left and right directions.

2. The electromechanical brake according to claim 1, wherein: The maximum length of the hollowed-out area in the left-right direction is greater than half of the length of the controller housing in the left-right direction and less than two-thirds of the length of the controller housing in the left-right direction.

3. The electromechanical brake according to claim 1 or 2, characterized in that: The side wall of the hollowed area is an inclined surface arranged obliquely relative to the rear end surface of the controller housing, and the inclined surface extends obliquely from the rear of the controller housing forward and toward a side away from the motor; The rear wall of the hollowed area is arranged parallel to the rear end surface of the controller housing.

4. The electromechanical brake according to claim 1, wherein: The controller housing includes a lower shell and an upper cover fixedly arranged on the lower shell, and the hollow area passes through the upper and lower end surfaces of the upper cover and extends downward to the lower part of the lower shell.

5. The electromechanical brake according to claim 1, wherein: The plane is arranged parallel to the rear end surface of the controller housing.

6. The electromechanical brake according to claim 1, wherein: The controller housing includes a lower shell and an upper cover fixedly arranged on the lower shell, and a controller cavity is formed between the lower shell and the upper cover. The controller component also includes a circuit board arranged in the controller cavity and a plurality of electrical chips arranged at intervals on the circuit board. A heat dissipation structure is arranged at the position of the controller component corresponding to the electrical chip, and at least one group of heat dissipation structures is provided.

7. The electromechanical brake according to claim 6, characterized in that: The heat dissipation structure includes a heat dissipation adhesive layer provided between the electrical chip and the upper cover. The heat dissipation adhesive layer is bonded to the electrical chip and the upper cover respectively, and at least one heat dissipation adhesive layer is provided.

8. The electromechanical brake according to claim 7, characterized in that: The heat dissipation structure further includes a recessed portion provided on the upper cover. The position of the recessed portion corresponds to the position of the heat dissipation adhesive layer. In a horizontal projection direction, the recessed portion covers the heat dissipation adhesive layer.

9. The electromechanical brake according to claim 1, wherein: The motor also includes a motor end cover fixedly arranged on the motor housing, a motor cavity is formed between the motor housing and the motor end cover, and the motor also includes motor terminals arranged in the motor cavity; the controller housing has a controller cavity, and the controller assembly also includes a circuit board arranged in the controller cavity, the motor terminals sequentially pass through the motor end cover and the controller housing into the controller cavity, and are connected to the circuit board, a plurality of motor terminals are provided, and the MGU assembly also includes a seal respectively mounted on each of the motor terminals, and the seal is made of elastic material.

10. The electromechanical brake according to claim 9, characterized in that: The sealing member includes a plurality of sealing sleeves that are fixedly connected or integrally arranged, and each of the sealing sleeves is correspondingly sleeved on one of the motor terminals. The sealing sleeves extend upward to the controller housing and downward to the motor end cover along the extension direction of the motor terminal. A convex portion that protrudes toward the outside of the outer circumferential surface of the sealing sleeve is provided on the outer circumference of each sealing sleeve, and the convex portion extends in a ring shape along the outer circumference of the sealing sleeve. The convex portion is respectively arranged on the upper and lower parts of each sealing sleeve, the controller housing is pressed on the convex portion located at the upper part, and the motor end cover is pressed on the convex portion located at the lower part.

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