Brake-by-wire system control unit assembly, integrated brake-by-wire system and vehicle

Abstract

The utility model relates to the technical field of automobile parts, especially to a brake-by-wire system control unit assembly, integrated brake-by-wire system and car, including casing, heat dissipation back cover and PCBA, the top of casing is equipped with installation cavity, PCBA fixed mounting in the installation cavity, the top of heat dissipation back cover is established in the casing is used to cover the top of casing, heat dissipation back cover is fixedly connected with casing through buckle mechanism, the top of heat dissipation back cover and casing is sealedly connected. The utility model has the advantages of: the utility model reduces integrated brake system back cover assembly risk through the buckle connection between back cover and casing, compared with the past through sealing glue realizes fixed and sealing effect, and the buckle structure connection is favorable for reducing the requirement to sealing glue performance, and is favorable for reducing the total assembly cost and using the localization substitution.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, and in particular to a brake-by-wire system control unit assembly, an integrated brake-by-wire system, and an automobile. Background Technology

[0002] With the continuous improvement of automotive electronics and intelligence, brake-by-wire systems, as an important component of intelligent driving and new energy vehicles, have gradually replaced traditional mechanical hydraulic braking systems. Brake-by-wire systems use electronic control units to precisely control the braking actuators, enabling active adjustment of braking force and improving the vehicle's response speed, energy recovery efficiency, and safety performance.

[0003] In online control systems, the control unit assembly typically includes a housing, a rear cover, and key components such as electronic control modules, power modules, and communication interfaces housed within the housing. Because this control unit must operate for extended periods in complex automotive environments, such as high temperature, high humidity, vibration, and salt spray, high demands are placed on its sealing performance, structural reliability, and assembly efficiency.

[0004] Currently, the connection between the housing and back cover of the control unit in existing technologies mostly uses sealant for fixing and sealing. While this method can provide a certain sealing effect, it has the following technical problems: 1. It is highly dependent on the performance of the sealant. To ensure sealing, high-performance sealant materials are required, which are often imported, expensive, and detrimental to cost control; 2. The assembly process is complex. The application and curing of the sealant takes a long time, affecting production efficiency; 3. It has poor maintainability. Once a fault occurs inside the control unit, the back cover is difficult to disassemble without damage, making repair difficult and often requiring complete replacement, increasing after-sales costs. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a brake-by-wire system control unit assembly, an integrated brake-by-wire system, and an automobile, so as to overcome the above-mentioned deficiencies in the prior art.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A control unit assembly for a brake-by-wire system includes a housing, a heat dissipation cover and a PCBA. The top of the housing is provided with a mounting cavity, and the PCBA is fixedly installed in the mounting cavity. The heat dissipation cover is provided on the top of the housing for sealing the top of the housing. The heat dissipation cover is fixedly connected to the housing through a snap-fit ​​mechanism, and the heat dissipation cover and the top of the housing are sealed together.

[0007] The beneficial effects of this utility model are: This utility model reduces the assembly risk of the rear cover of the integrated braking system by using a snap-fit ​​connection between the rear cover and the housing. Compared with the previous method of using sealant to achieve fixation and sealing, the snap-fit ​​connection helps to reduce the requirements for the performance of the sealant, which is beneficial to reducing the cost of the assembly and using domestic alternatives.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, a heating element is fixedly provided on the side of the PCBA facing the heat dissipation cover, and a rear cover protrusion is provided on the heat dissipation cover in the direction of the PCBA. The rear cover protrusion abuts against the heating element, and thermal grease is provided between the rear cover protrusion and the heating element.

[0010] The advantages of adopting the above-mentioned further solution are: the solution of directly conducting heat between the heat-generating element and the heat sink cover through thermal grease avoids the previous solution where the heat-generating element conducts heat through PCBA and heat sink copper pillars before dissipating heat, which is conducive to improving the overall heat dissipation capacity and improving the reliability and safety of the system.

[0011] Furthermore, the outer periphery of the heat dissipation cover is provided with an outer edge extending towards the housing. The outer edge wraps around the top outer periphery of the housing. The top of the housing abuts against the lower surface of the heat dissipation cover. A first sealing ring is provided between the top of the housing and the lower surface of the heat dissipation cover. The outer edge is fixedly connected to the housing by the snap-fit ​​mechanism.

[0012] The beneficial effects of adopting the above-mentioned further solution are: by setting an outer edge that wraps around the outer periphery of the top of the housing on the outer periphery of the heat dissipation cover, it is convenient to set the snap-fit ​​mechanism on the one hand, and on the other hand, it can improve the sealing effect of the first sealing ring.

[0013] Furthermore, a number of positioning ribs are fixedly provided on the outer peripheral wall of the housing, and a slot matching the positioning ribs is provided on the outer edge, and the positioning ribs are inserted into the slots.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the positioning ribs and slots facilitate the positioning and installation of the heat dissipation back cover and the housing.

[0015] Furthermore, the shell has ventilation holes on its two opposite side walls, and a waterproof and breathable membrane is fixedly installed at each ventilation hole.

[0016] The beneficial effects of adopting the above-mentioned further solution are: the setting of two vents can improve the effect of gas flow inside the control unit components, enhance heat dissipation capacity, and greatly improve the stability and environmental usability of the entire system; the setting of waterproof and breathable membrane can achieve waterproofing.

[0017] Furthermore, the latching mechanism includes a plurality of back cover latches evenly arranged along the periphery of the heat dissipation back cover, and a plurality of housing latches evenly arranged along the periphery of the housing, wherein the back cover latches are latched one-to-one onto the housing latches.

[0018] The advantages of adopting the above-mentioned further solutions are: simple structure and convenient connection and disassembly.

[0019] This utility model solves the above-mentioned technical problems and also provides an integrated brake-by-wire system, including a hydraulic unit body, a reservoir assembly, a master cylinder assembly, a motor, a foot-feed simulator assembly, a plunger pump assembly, and the aforementioned brake-by-wire system control unit assembly. The reservoir assembly, the master cylinder assembly, the motor, the foot-feed simulator assembly, the plunger pump assembly, and the housing are fixedly mounted on the hydraulic unit body, and the housing is sealed to the hydraulic unit body.

[0020] The beneficial effects of adopting the above solution are: This utility model reduces the assembly risk of the rear cover of the integrated braking system by using a snap-fit ​​connection between the rear cover and the housing. Compared with the previous method of using sealant to achieve fixation and sealing, the snap-fit ​​connection helps to reduce the requirements for the performance of the sealant, which is beneficial to reducing the cost of the assembly and using domestic alternatives.

[0021] Furthermore, the housing and the hydraulic unit body are detachably connected by bolts, and a second sealing ring is provided between the housing and the hydraulic unit body.

[0022] The beneficial effect of adopting the above-mentioned further solution is that the setting of the second sealing ring can improve the sealing between the housing and the hydraulic unit body, thereby improving the reliability and safety of the entire system.

[0023] Furthermore, the periphery of the housing is uniformly provided with multiple connecting seats, each connecting seat is fixedly provided with a tubular insert, and a fixing bolt is rotatably provided in the tubular insert, the fixing bolt being threadedly connected to the hydraulic unit body.

[0024] The beneficial effect of adopting the above-mentioned further solution is that the setting of the tubular insert enables the connection strength between the fixing bolt and the hydraulic unit body to be unrestricted by the material of the housing, thus ensuring the stability and reliability of the connection between the housing and the hydraulic unit body.

[0025] This utility model solves the above-mentioned technical problems and also provides an automobile, including the integrated brake-by-wire system described above.

[0026] The beneficial effects of adopting the above solution are: This utility model reduces the assembly risk of the rear cover of the integrated braking system by using a snap-fit ​​connection between the rear cover and the housing. Compared with the previous method of using sealant to achieve fixation and sealing, the snap-fit ​​connection helps to reduce the requirements for the performance of the sealant, which is beneficial to reducing the cost of the assembly and using domestic alternatives. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the control unit assembly of the brake-by-wire system of this utility model; Figure 2 This is a schematic diagram showing the installation of the vent holes and the waterproof and breathable membrane in this utility model; Figure 3 This is a top view of the installation of the waterproof and breathable membrane in this utility model; Figure 4 This is a schematic diagram of the integrated brake-by-wire system of this utility model; Figure 5 This is a front view of the integrated brake-by-wire system of this utility model; Figure 6 This is a schematic diagram showing the connection between the housing and the hydraulic unit body in this utility model; The attached diagram lists the components represented by each number as follows: 1. Control unit assembly; 1.1. Rear cover; 1.1.1. Slot; 1.1.2. Rear cover boss; 1.1.3. Rear cover buckle; 1.1.4. Outer edge; 1.2. Housing; 1.2.1. Positioning rib; 1.2.2. Tubular insert; 1.2.3. Housing latch; 1.2.4. Waterproof and breathable membrane; 1.2.5. Vent hole; 1.3. Fixing bolt; 1.4. Second sealing ring; 1.5. First sealing ring; 1.6. PCBA; 1.6.1. Heating element; 2. Liquid reservoir assembly; 3. Hydraulic unit body; 4. Master cylinder assembly 5. Motor; 6. Foot feel simulator component. Detailed Implementation

[0028] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0029] Example 1 like Figure 1 , Figure 2 , Figure 3As shown, this embodiment discloses a control unit assembly 1 for a brake-by-wire system, including a housing 1.2, a heat dissipation cover 1.1, and a PCBA 1.6 (PCBA 1.6 is short for Printed Circuit Board Assembly, meaning the entire process of a bare PCB board undergoing SMT assembly or DIP insertion). The top of the housing 1.2 has a mounting cavity, and the PCBA 1.6 is fixedly installed in the mounting cavity. The heat dissipation cover 1.1 is located on the top of the housing 1.2 to cover the top of the housing 1.2. The heat dissipation cover 1.1 is fixedly connected to the housing 1.2 by a snap-fit ​​mechanism, and the heat dissipation cover 1.1 and the top of the housing 1.2 are sealed together.

[0030] Specifically, the latching mechanism includes multiple back cover latches 1.1.3 evenly arranged around the periphery of the heat dissipation back cover 1.1, and multiple housing latches 1.2.3 evenly arranged around the periphery of the housing 1.2. The back cover latches 1.1.3 are latched one-to-one onto the housing latches 1.2.3. The structure is simple and the connection and disassembly are convenient.

[0031] In this embodiment, a heating element 1.6.1 is fixedly mounted on the side of the PCBA1.6 facing the heat dissipation cover 1.1. The heat dissipation cover 1.1 has a recessed boss 1.1.2 facing the PCBA1.6, which abuts against the heating element 1.6.1. Thermal grease is provided between the boss 1.1.2 and the heating element 1.6.1. This direct thermal grease connection between the heating element 1.6.1 and the heat dissipation cover 1.1 avoids the previous method where the heating element 1.6.1 conducts heat through the PCBA1.6 and the heat dissipation copper pillars before dissipating heat, thus improving the overall heat dissipation capacity and enhancing the reliability and safety of the system.

[0032] The heat dissipation cover 1.1 has an outer edge 1.1.4 extending towards the housing 1.2 on its outer periphery. The outer edge 1.1.4 wraps around the top outer periphery of the housing 1.2. The top of the housing 1.2 abuts against the lower surface of the heat dissipation cover 1.1. A first sealing ring 1.5 is provided between the top of the housing 1.2 and the lower surface of the heat dissipation cover 1.1. The outer edge 1.1.4 is fixedly connected to the housing 1.2 by the snap-fit ​​mechanism. By providing an outer edge 1.1.4 that wraps around the top outer periphery of the housing 1.2 on the outer periphery of the heat dissipation cover 1.1, the snap-fit ​​mechanism can be easily set up, and the sealing effect of the first sealing ring 1.5 can be improved.

[0033] The first sealing ring 1.5 has an inverted U-shaped cross-section and is fastened to the top edge of the housing 1.2. Correspondingly, the periphery of the heat dissipation cover 1.1 and the connection between the outer edge 1.1.4 and the first sealing ring 1.5 are provided with a groove that matches the first sealing ring 1.5, so that the top of the first sealing ring 1.5 can be inserted into the groove for positioning. At the same time, the two side walls of the groove squeeze the two opposite outer walls of the first sealing ring 1.5, thereby improving the sealing performance between the top of the housing 1.2 and the first sealing ring 1.5.

[0034] A plurality of positioning ribs 1.2.1 are fixedly provided on the outer peripheral wall of the housing 1.2, and a slot 1.1.1 matching the positioning ribs 1.2.1 is provided on the outer edge 1.1.4, and the positioning ribs 1.2.1 are inserted into the slots 1.1.1. The positioning ribs 1.2.1 and the slots 1.1.1 are provided to facilitate the positioning and installation of the heat dissipation back cover 1.1 and the housing 1.2.

[0035] In this embodiment, vent holes 1.2.5 are provided on both opposite side walls of the housing 1.2, and a waterproof and breathable membrane 1.2.4 is fixedly installed at each vent hole 1.2.5. The arrangement of the two vent holes 1.2.5 can improve the gas flow effect inside the control unit component 1, enhance heat dissipation capacity, and greatly improve the stability and environmental usability of the entire system. The waterproof and breathable membrane 1.2.4 can achieve waterproofing.

[0036] like Figure 2 , Figure 3 As shown, in this embodiment, the vent 1.2.5 is disposed on the side wall of the housing 1.2, and an airflow channel is formed inside the housing 1.2. The channel is bent at 90 degrees, so that the plane of the waterproof and breathable membrane 1.2.4 is perpendicular to the outlet plane of the vent 1.2.5, thus avoiding the risk of impact on the waterproof and breathable membrane 1.2.4 when the vehicle is wading through water.

[0037] Example 2 like Figure 4 , Figure 5 , Figure 6 As shown, this embodiment discloses an integrated brake-by-wire system, including a hydraulic unit body 3, a reservoir assembly 2, a master cylinder assembly 4, a motor 5, a foot sensor simulator assembly 6, a plunger pump assembly, and the aforementioned brake-by-wire system control unit assembly 1. The reservoir assembly 2, the master cylinder assembly 4, the motor 5, the foot sensor simulator assembly 6, the plunger pump assembly, and the housing 1.2 are fixedly mounted on the hydraulic unit body 3, and the housing 1.2 is sealed to the hydraulic unit body 3.

[0038] like Figure 6As shown, the housing 1.2 and the hydraulic unit body 3 are detachably connected by bolts. A second sealing ring 1.4 is provided between the housing 1.2 and the hydraulic unit body 3. The housing 1.2 and the hydraulic unit body 3 compress the second sealing ring 1.4, causing it to deform and ensuring a tight seal, thereby improving the reliability and safety of the entire system. Specifically, multiple connecting seats are uniformly and integrally arranged around the periphery of the housing 1.2. A tubular insert 1.2.2 is fixedly installed within each connecting seat. A fixing bolt 1.3 is rotatably installed within the tubular insert 1.2.2, and the fixing bolt 1.3 is threadedly connected to the hydraulic unit body 3. The tubular insert 1.2.2 ensures that the connection strength between the fixing bolt 1.3 and the hydraulic unit body 3 is not limited by the material of the housing 1.2, thus ensuring the stability and reliability of the connection between the housing 1.2 and the hydraulic unit body 3.

[0039] In the entire system, the hydraulic unit body 3 is the foundation and supporting carrier of the entire brake-by-wire system assembly. Basically, all other components are mounted on the hydraulic unit body 3. The hydraulic unit body 3 has a parallelepiped structure, but is generally a relatively regular shape like a cuboid. Sometimes, to reduce weight or avoid spatial interference, a large chamfer is made at at least one edge. The hydraulic unit body 3 is generally made of aluminum alloy, which is easy to process and lightweight. A certain number of solenoid valves and corresponding pressure sensors are arranged on one of its two large faces, the one closest to the control unit assembly 1. Inside the control unit assembly 1, coils are arranged at the positions corresponding to the solenoid valves. The coils are wrapped around the solenoid valves, and when energized, they generate a magnetic field, driving the solenoid valves to open and close. A circuit board is located in the control unit assembly 1 to drive the different coils and acquire pressure sensor signals. The control unit assembly 1 is the control device for the entire brake-by-wire system. Its core function is to realize information interaction between the brake-by-wire system and the vehicle, collect signals from multiple sensors in the system, control the flow of brake fluid inside the hydraulic unit, and control the braking force of each wheel. Different combinations of solenoid valve switching control can achieve different hydraulic function outputs. Pressure sensors are used to measure and sense system pressure to achieve closed-loop control of system pressure. Inside the hydraulic unit body 3, a crisscrossing, layered hydraulic pipeline is arranged to connect the solenoid valves, pressure sensors, and the aforementioned main cylinder assembly 4, foot-sensor simulator assembly 6, reservoir assembly 2, plunger pump assembly, etc., forming a complex and orderly hydraulic system. On one large surface of the control unit assembly 1, a motor 5 is arranged and fixed with bolts. The foot-sensor simulator assembly 6 is installed on the lowest surface of the hydraulic unit body 3. The reservoir assembly 2 is located on the highest surface of the hydraulic unit body 3. The main cylinder assembly 4 is arranged inside the hydraulic unit body 3, running through its left and right surfaces, with its overall orientation aligned with the reservoir assembly 2, and its axis basically perpendicular to the axis of the motor 5.

[0040] Example 3 This embodiment discloses an automobile, including the integrated brake-by-wire system described above.

[0041] This utility model reduces the assembly risk of the rear cover 1.1 of the integrated braking system by using a snap-fit ​​connection between the rear cover 1.1 and the housing 1.2. Compared with the previous method of using sealant to achieve fixation and sealing, the snap-fit ​​connection helps to reduce the requirements for the performance of the sealant, which is beneficial to reducing the cost of the assembly and using domestic alternatives.

[0042] In the description of this utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "circumferential", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system 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.

[0043] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A brake-by-wire system control unit assembly, comprising: The device includes a housing (1.2), a heat dissipation back cover (1.1), and a PCBA (1.6). The top of the housing (1.2) has a mounting cavity, and the PCBA (1.6) is fixedly installed in the mounting cavity. The heat dissipation back cover (1.1) is located on the top of the housing (1.2) to cover the top of the housing (1.2). The heat dissipation back cover (1.1) is fixedly connected to the housing (1.2) by a snap-fit ​​mechanism. 2) The tops are sealed together; a heating element (1.6.1) is fixedly provided on the side of the PCBA (1.6) facing the heat dissipation back cover (1.1), and a back cover boss (1.1.2) is provided on the heat dissipation back cover (1.1) in the direction of the PCBA (1.6). The back cover boss (1.1.2) abuts against the heating element (1.6.1), and thermal grease is provided between the back cover boss (1.1.2) and the heating element (1.6.1).

2. The brake-by-wire system control unit assembly according to claim 1, characterized by The outer periphery of the heat dissipation cover (1.1) is provided with an outer edge (1.1.4) extending toward the housing (1.2). The outer edge (1.1.4) wraps around the top outer periphery of the housing (1.2). The top of the housing (1.2) abuts against the lower surface of the heat dissipation cover (1.1). A first sealing ring (1.5) is provided between the top of the housing (1.2) and the lower surface of the heat dissipation cover (1.1). The outer edge (1.1.4) is fixedly connected to the housing (1.2) by the snap-fit ​​mechanism.

3. The control unit assembly for a brake-by-wire system according to claim 2, characterized in that, A plurality of positioning ribs (1.2.1) are fixedly provided on the outer peripheral wall of the housing (1.2), and a slot (1.1.1) matching the positioning ribs (1.2.1) is provided on the outer edge (1.1.4), and the positioning ribs (1.2.1) are inserted into the slots (1.1.1).

4. A brake-by-wire system control unit assembly according to any one of claims 1 to 3, characterized in that, The shell (1.2) has ventilation holes (1.2.5) on its two opposite side walls, and a waterproof and breathable membrane (1.2.4) is fixedly installed at the ventilation holes (1.2.5).

5. A brake-by-wire system control unit assembly according to any one of claims 1 to 3, characterized in that, The latching mechanism includes a plurality of rear cover latches (1.1.3) evenly arranged around the periphery of the heat dissipation rear cover (1.1), and a plurality of housing latches (1.2.3) evenly arranged around the periphery of the housing (1.2). The rear cover latches (1.1.3) are latched one-to-one onto the housing latches (1.2.3).

6. An integrated brake-by-wire system, characterized in that, The system includes a hydraulic unit body (3), a reservoir assembly (2), a master cylinder assembly (4), a motor (5), a foot-feed simulator assembly (6), a plunger pump assembly, and a brake-by-wire system control unit assembly as described in any one of claims 1 to 5. The reservoir assembly (2), the master cylinder assembly (4), the motor (5), the foot-feed simulator assembly (6), the plunger pump assembly, and the housing (1.2) are fixedly mounted on the hydraulic unit body (3), and the housing (1.2) is sealed to the hydraulic unit body (3).

7. An integrated brake-by-wire system according to claim 6, characterized in that, The housing (1.2) and the hydraulic unit body (3) are detachably connected by bolts, and a second sealing ring (1.4) is provided between the housing (1.2) and the hydraulic unit body (3).

8. An integrated brake-by-wire system according to claim 7, characterized in that, The periphery of the housing (1.2) is uniformly provided with multiple connecting seats. A tubular insert (1.2.2) is fixedly provided in the connecting seat. A fixing bolt (1.3) is rotatably provided in the tubular insert (1.2.2). The fixing bolt (1.3) is threadedly connected to the hydraulic unit body (3).

9. A car, characterized in that, Includes the integrated brake-by-wire system as described in any one of claims 6 to 8.

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