Pressure buildup device, integrated brake control system and vehicle

Abstract

The invention discloses a pressure buildup device which comprises a driving assembly, a motor assembly, a valve block assembly and a supporting assembly, and the motor assembly is connected with the valve block assembly; the valve block assembly is provided with a containing cavity, and the supporting assembly is located on the inner wall of the containing cavity and used for supporting the driving assembly so that the driving assembly can not make contact with the inner wall of the containing cavity. The driving assembly is at least composed of a piston and a ball screw, the piston is connected with a nut of the ball screw, the first end of the ball screw is connected with a rotor assembly of the motor assembly, and the piston is driven by the rotor assembly to move in the containing cavity. Meanwhile, the invention further discloses an integrated brake control system and a vehicle.

Description

Technical Field

[0001] The present application relates to the field of machinery, and in particular to a pressure building device, an integrated braking control system and a vehicle. Background Art

[0002] With the rapid development of intelligent and electric vehicles, market competition is becoming increasingly fierce, and people are becoming more and more sensitive to their production costs. How to reduce the production cost of automobiles is an urgent problem to be solved. Summary of the Invention

[0003] In view of this, embodiments of the present application hope to provide a pressure building device, an integrated braking control system and a vehicle to at least solve the above-mentioned technical problems.

[0004] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0005] According to one aspect of an embodiment of the present application, a pressure building device is provided, the device comprising:

[0006] A drive assembly, a motor assembly, a valve block assembly, and a support assembly, wherein the motor assembly is connected to the valve block assembly; the valve block assembly has an accommodating cavity, and the support assembly is located on the inner wall of the accommodating cavity and is used to support the drive assembly so that the drive assembly does not contact the inner wall of the accommodating cavity;

[0007] The driving assembly is composed of at least a piston and a ball screw, the piston is connected to the nut of the ball screw, the first end of the ball screw is connected to the rotor assembly of the motor assembly, and the piston is driven to move in the accommodating chamber under the drive of the rotor assembly.

[0008] In the above solution, the rotor assembly at least includes:

[0009] A hollow shaft, wherein the shaft wall of the hollow shaft has a first through hole penetrating inside and outside the shaft wall, the first end of the ball screw has a first protrusion, and the ball screw is pressed into the hollow shaft so that the first protrusion is engaged and fixed with the first through hole.

[0010] In the above solution, a first groove is provided in the shaft wall of the hollow shaft, a limiting structure is provided in the first groove, and a surface of the limiting structure protrudes from the edge of the first groove for abutting against the nut on the ball screw.

[0011] In the above solution, the valve block assembly includes:

[0012] An anti-rotation sleeve, a cylinder body and a valve block, wherein the valve block has the accommodating cavity, and the inner wall of the accommodating cavity has a plurality of second grooves for carrying the support assembly;

[0013] The anti-rotation sleeve is fixed to one end of the valve block, and the ribs on the inner wall of the anti-rotation sleeve are matched and connected with the outer surface of the nut on the ball screw.

[0014] The cylinder body is fixed on the valve block and connected to one end of the piston; the cylinder body has a chamber, and the chamber is communicated with the accommodating chamber.

[0015] In the above scheme, the support assembly is composed of at least a main leather cup, a secondary leather cup and a sliding bearing, wherein the main leather cup, the secondary leather cup and the sliding bearing are respectively installed in the corresponding second grooves on the valve block, and the sliding bearing is located between the main leather cup and the secondary leather cup.

[0016] In the above scheme, the motor assembly is composed of at least the rotor assembly, the stator assembly, the end cover assembly and the casing, wherein the rotor assembly and the stator assembly are both arranged in the casing, the stator assembly is used to generate a first magnetic field, and the center portion of the stator assembly has a second through hole for the rotor assembly to pass through; the first end of the rotor assembly is connected to the casing through the second through hole, the rotor assembly is used to generate a second magnetic field, the second magnetic field interacts with the first magnetic field to generate a rotational force, and the rotational force is used to drive the ball screw to rotate; the end cover assembly is pressed onto the second end of the rotor assembly and is connected to the valve block assembly.

[0017] In the above solution, the anti-rotation sleeve includes a sleeve portion and a mounting portion, the mounting portion is provided at one end of the sleeve portion, and the mounting portion has a plurality of second protrusions, and the second protrusions are connected and fixed to the valve block.

[0018] In the above solution, the outer diameter of the anti-rotation sleeve is less than or equal to 29.5 mm, and the axial length is less than or equal to 70 mm.

[0019] According to a second aspect of the present application, an integrated braking control system is provided, which includes at least an electronic control unit, a master cylinder, a fluid reservoir, a pedal feel simulator and a pressure building device as described in any one of the above items, wherein the electronic control unit, the master cylinder, the fluid reservoir and the pedal feel simulator are all connected to the valve block assembly of the pressure building device.

[0020] According to a third aspect of the present application, a vehicle is provided, comprising the pressure building device described in any one of the above items.

[0021] The pressure-building device, integrated brake control system, and vehicle provided in the present application are a solution for reducing the overall cost of the device by changing the connection structure between the drive assembly, the motor assembly, and the valve block assembly. Specifically, the pressure-building device includes: a drive assembly, a motor assembly, a valve block assembly, and a support assembly, wherein the motor assembly is connected to the valve block assembly; the valve block assembly has a receiving cavity, and the support assembly is located on the inner wall of the receiving cavity, for supporting the drive assembly so that there is no contact between the drive assembly and the inner wall of the receiving cavity; the drive assembly is composed of at least a piston and a ball screw, the piston is connected to the nut of the ball screw, the first end of the ball screw is connected to the rotor assembly of the motor assembly, and the piston is driven to move in the receiving cavity under the drive of the rotor assembly. In this way, not only is the overall structure of the pressure-building device simplified and the comprehensive cost of the pressure-building device reduced, but the provision of the support assembly can also reduce the friction between the parts, reduce the noise and wear of the parts, and increase the service life of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the structure of the pressure building device in this application Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of the motor assembly in this application;

[0024] Figure 3 Schematic diagram of the connection structure between the ball screw and the hollow shaft in this application;

[0025] Figure 4 This is a schematic structural diagram of the anti-rotation sleeve in this application;

[0026] Figure 5 This is a schematic diagram of the structural composition of the integrated braking control system in this application. DETAILED DESCRIPTION

[0027] The technical solution of the present application is further elaborated in detail below with reference to the accompanying drawings and specific embodiments.

[0028] The various specific technical features in the various embodiments described in the specific implementation methods can be combined in various ways without contradiction. For example, different implementation methods can be formed by combining different specific technical features. In order to avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0029] It should be noted that the terms "first, second, and third" used in the embodiments of the present application are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It is understood that the terms "first, second, and third" may be interchanged to represent a specific order or precedence, where permitted. It should be understood that the terms "first, second, and third" may be interchanged to represent objects, where appropriate, such that the embodiments of the present application described herein may be implemented in an order other than that illustrated or described herein.

[0030] Figure 1 Schematic diagram of the structure of the pressure building device in this application Figure 1 ,like Figure 1 As shown, the pressure building device includes: a drive assembly 10, a motor assembly 20, a valve block assembly 30 and a support assembly 40, wherein the motor assembly 20 is connected to the valve block assembly 30; the valve block assembly 30 has an accommodating cavity (not shown in the figure), and the support assembly 40 is located on the inner wall of the accommodating cavity, for supporting the drive assembly 10 so that the drive assembly 10 has no contact with the inner wall of the accommodating cavity.

[0031] In the present application, the drive assembly 10 is composed of at least a piston 101 and a ball screw 102. The ball screw 102 includes a screw, balls, a nut, and a deflector (not shown in the figure). The screw has a spiral groove, a raceway is formed between the spiral groove and the nut, the balls are arranged in the raceway, and the deflector can be installed at both ends of the nut to form a closed passage for the raceway. The piston 101 is threadedly connected to the nut on the ball screw 102. The first end of the ball screw 102 is connected to the rotor assembly 201 of the motor assembly 20. The piston 101 is driven by the rotor assembly 201 to move within the accommodating chamber.

[0032] The pressure-building device provided in this application not only simplifies the installation process between the piston and the screw, but also avoids the generation of parts noise and parts wear during operation of the pressure-building device, thereby greatly reducing the overall production cost of the pressure-building device.

[0033] Figure 2 This is a schematic diagram of the structure of the motor assembly in this application, such as Figure 2As shown, in the present application, the motor assembly 20 is composed of at least the rotor assembly 201, the stator assembly 202, the end cover assembly 203 and the casing 204, wherein the rotor assembly 201 and the stator assembly 202 are both arranged in the casing 204, the stator assembly 202 is used to generate a first magnetic field, and the central portion of the stator assembly 202 has a second through hole 2021 for the rotor assembly 201 to pass through; the first end of the rotor assembly 201 is connected to the casing 204 through the second through hole 2021, the rotor assembly 201 is used to generate a second magnetic field, and the second magnetic field interacts with the first magnetic field to generate a rotational force, and the rotational force is used to drive the ball screw 102 to rotate; the end cover assembly 203 is pressed onto the second end of the rotor assembly 201 and is connected to the valve block assembly 30.

[0034] Here, the stator assembly 202 includes a busbar structure 2022 and a stator structure 2023 . The busbar structure 2022 and the stator structure 2023 are connected by welding, riveting or clamping, and then fixed to the housing 204 by shrink fitting or bonding.

[0035] Here, the end cover assembly 203 includes an end cover body 2031 and a 4P bearing 2032, and the rotor assembly 201 includes a hollow shaft 2011, a ball bearing 2012 and a magnetic steel assembly 2013, wherein the magnetic steel assembly 2013 is pressed onto the hollow shaft 2011 and is located between the first end and the second end of the hollow shaft 2011, the first end of the hollow shaft 2011 passes through the second through hole 2021 of the stator assembly 202, the ball bearing 2012 is pressed onto the first end of the hollow shaft 2011, and is abutted and fixed with the elastic part 2041 at the bottom of the casing 204, the end cover body 2031 is pressed onto the 4P bearing 2032, the 4P bearing 2032 is pressed onto the second end of the hollow shaft 2011, and is connected and fixed to the valve block assembly 30 through the connecting part of the end cover body 2031.

[0036] Here, the connection method between the end cover body 2031 and the valve block assembly 30 is not limited, including but not limited to riveting, welding and clamping.

[0037] Here, the housing 204 may also be connected and fixed to the valve block assembly 30 , and the connection method is not limited, including but not limited to riveting, welding and clamping.

[0038] Here, both the end cover body 2031 and the housing 204 may be formed by stamping.

[0039] By improving the structure of the motor assembly in the present application, the axial force of the casing can be reduced, and the manufacturing cost or purchase cost of the motor assembly can be reduced.

[0040] Figure 3 This is a schematic diagram of the connection structure between the ball screw and the hollow shaft in this application, as shown in Figure 3As shown, the shaft wall of the hollow shaft 2011 has a first through hole 20111 that passes through the inside and outside of the shaft wall, and the first end of the ball screw 102 has a first protrusion 1021 that matches the first through hole 20111. The ball screw 102 is pressed into the hollow shaft 2011 so that the first protrusion 1021 is engaged and fixed with the first through hole 20111.

[0041] Here, the number of the first through holes 20111 is not limited, and one or more first through holes 20111 can be arranged in a ring along the shaft wall of the hollow shaft 2011 .

[0042] The connection structure provided in the present application can satisfy the torque transmission of the pressure-building device and prevent the ball screw from falling off from the motor assembly.

[0043] In the present application, a first groove 20112 may also be provided in the shaft wall of the hollow shaft 2011, and a limiting structure 20113 is provided in the first groove 20112. The surface of the limiting structure 20113 protrudes from the edge of the first groove 20112 and is used to abut the nut on the ball screw 102.

[0044] Here, the number of the first grooves 20112 is not limited. For example, one or more first grooves 20112 can be arranged in a ring shape along the wall of the hollow shaft 2011 .

[0045] Here, the specific structure of the limiting structure 20113 is not limited, including but not limited to a spherical structure, a triangular structure, and a ring structure.

[0046] Here, the limiting structure 20113 can specifically be a steel ball, an iron ball, an elastic part, etc.

[0047] The connection structure provided in the present application can limit the retraction position of the nut on the ball screw, preventing the nut from fitting against the hollow shaft and getting stuck.

[0048] In the present application, the valve block assembly 30 includes: an anti-rotation sleeve 301, a cylinder body 302 and a valve block 303, wherein the valve block 303 has the accommodating cavity, and the inner wall of the accommodating cavity has multiple second grooves 304 for carrying the support assembly 10; the anti-rotation sleeve 301 is fixed on the valve block 303, and the ribs on the inner wall of the anti-rotation sleeve 301 are matched with the outer surface of the nut on the ball screw 102; the cylinder body 302 is fixed on the valve block 303 and connected to one end of the piston 101; the cylinder body 302 has a chamber, which is connected to the accommodating cavity.

[0049] This application can further reduce the manufacturing cost of the pressure building device by reducing the oil cavity of the cylinder.

[0050] Figure 4 This is a schematic diagram of the structure of the anti-rotation sleeve in this application, as shown in FIG. Figure 4As shown, the anti-rotation sleeve 301 includes a sleeve portion 3011 and a mounting portion 3012 , wherein the mounting portion 3012 is arranged at one end of the sleeve portion 3011 , and a plurality of second protrusions 3013 are provided on the outer peripheral wall of the mounting portion 3012 , and the second protrusions 3013 are used to be connected and fixed to the valve block 303 .

[0051] Here, the outer diameter of the anti-rotation sleeve 301 is less than or equal to 29.5 mm, and the axial length is less than or equal to 70 mm.

[0052] The anti-rotation sleeve structure provided in the present application can not only improve the connection tightness between the anti-rotation sleeve and the valve block, but also further reduce the manufacturing cost or purchase cost of the pressure building device.

[0053] In the present application, the support assembly 40 is composed of at least a main leather cup 401, a secondary leather cup 402 and a sliding bearing 403, wherein the main leather cup 401, the secondary leather cup 402 and the sliding bearing 403 are respectively installed in the corresponding second groove 3011 on the valve block 304, and the sliding bearing 403 is located between the main leather cup 401 and the secondary leather cup 402.

[0054] The support assembly provided in this application can avoid friction between the piston and other metal parts such as the valve block and end cover, thereby preventing noise and wear in the pressure building device during operation.

[0055] Figure 5 This is a schematic diagram of the structure of the integrated braking control system in this application. Figure 5 As shown, the integrated brake control system includes at least an electronic control unit (ECU (Electronic Control Unit)) 200, a master cylinder 300, a fluid reservoir 400, a pedal feel simulator 500 and a pressure building device 100, wherein the pressure building device 100 is Figures 1 to 4 The pressure building device, the electronic control unit 200 , the master cylinder 300 , the fluid reservoir 400 and the pedal feel simulator 500 are all connected to the valve block assembly 30 on the pressure building device 100 .

[0056] By aligning the central axis of the motor assembly 20 on the pressure-building device 100 with the central axis of the valve block assembly 30, and aligning the outer groove on the nut of the ball screw on the drive assembly with the rib on the anti-rotation sleeve 302 on the valve block assembly 30, and then fixing the motor assembly 20 to the valve block of the valve block assembly 30 with screws, a pressure chamber can be formed between the end cover body, the valve block, the main leather cup, and the piston of the pressure-building device 100.

[0057] When the rotor assembly in the motor assembly 20 rotates, the rotor assembly drives the screw in the ball screw to rotate. When the screw rotates, the nut cannot rotate with it due to the limiting effect of the anti-rotation sleeve and can only move in a straight line, pushing the piston to move, so that the brake fluid in the pressure chamber generates pressure.

[0058] It should be noted that the integrated braking control system provided in the above embodiment is similar to the above Figures 1 to 4 The pressure building device provided belongs to the same concept. The specific implementation process can refer to the above device embodiment and will not be repeated here.

[0059] The integrated brake control system provided by this application can greatly reduce the cost of the system due to the structural improvement of the pressure building device.

[0060] The present application also provides a vehicle, which includes but is not limited to a car, a van, and a truck. Figures 1 to 4 The pressure building device shown.

[0061] It should be noted that the vehicle provided in the above embodiment is different from the above Figures 1 to 4 The pressure building device provided belongs to the same concept. The specific implementation process can refer to the above device embodiment and will not be repeated here.

[0062] In the several embodiments provided in this application, it should be understood that the disclosed devices, systems, and vehicles can be implemented in other ways. The device embodiments described above are merely illustrative. In addition, the features disclosed in the several device or equipment embodiments provided in this application can be combined arbitrarily to obtain new device or equipment embodiments, unless they conflict.

[0063] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A pressure building device, characterized in that: The device comprises: A drive assembly, a motor assembly, a valve block assembly, and a support assembly, wherein the motor assembly is connected to the valve block assembly; the valve block assembly has an accommodating cavity, and the support assembly is located on the inner wall of the accommodating cavity and is used to support the drive assembly so that the drive assembly does not contact the inner wall of the accommodating cavity; The driving assembly is composed of at least a piston and a ball screw, the piston is connected to the nut of the ball screw, the first end of the ball screw is connected to the rotor assembly of the motor assembly, and the piston is driven to move in the accommodating chamber under the drive of the rotor assembly.

2. The device according to claim 1, characterized in that The rotor assembly comprises at least: A hollow shaft, wherein the shaft wall of the hollow shaft has a first through hole penetrating inside and outside the shaft wall, the first end of the ball screw has a first protrusion, and the ball screw is pressed into the hollow shaft so that the first protrusion is engaged and fixed with the first through hole.

3. The device according to claim 2, characterized in that A first groove is provided in the shaft wall of the hollow shaft, and a limiting structure is provided in the first groove. The surface of the limiting structure protrudes from the edge of the first groove and is used to abut against the nut on the ball screw.

4. The device according to claim 1, characterized in that The valve block assembly includes: An anti-rotation sleeve, a cylinder body and a valve block, wherein the valve block has the accommodating cavity, and the inner wall of the accommodating cavity has a plurality of second grooves for carrying the support assembly; The anti-rotation sleeve is fixed on the valve block, and the ribs on the inner wall of the anti-rotation sleeve are in cooperation with the outer surface of the nut on the ball screw; The cylinder body is fixed on the valve block and connected to one end of the piston; the cylinder body has a chamber, and the chamber is communicated with the accommodating chamber.

5. The device according to claim 4, characterized in that The support assembly is composed of at least a main leather cup, a secondary leather cup and a sliding bearing, wherein the main leather cup, the secondary leather cup and the sliding bearing are respectively installed in the corresponding second grooves on the valve block, and the sliding bearing is located between the main leather cup and the secondary leather cup.

6. The device according to claim 1, characterized in that The motor assembly is composed of at least the rotor assembly, the stator assembly, the end cover assembly and the casing, wherein the rotor assembly and the stator assembly are both arranged in the casing, the stator assembly is used to generate a first magnetic field, and the center portion of the stator assembly has a second through hole for the rotor assembly to pass through; the first end of the rotor assembly is connected to the casing through the second through hole, the rotor assembly is used to generate a second magnetic field, the second magnetic field interacts with the first magnetic field to generate a rotational force, and the rotational force is used to drive the ball screw to rotate; the end cover assembly is pressed onto the second end of the rotor assembly and connected to the valve block assembly.

7. The device according to claim 4, characterized in that The anti-rotation sleeve includes a sleeve portion and a mounting portion. The mounting portion is provided at one end of the sleeve portion and has a plurality of second protrusions thereon. The second protrusions are connected and fixed to the valve block.

8. The device according to claim 4, characterized in that The outer diameter of the anti-rotation sleeve is less than or equal to 29.5 mm, and the axial length is less than or equal to 70 mm.

9. An integrated braking control system, characterized in that: The system includes at least an electronic control unit, a master cylinder, a fluid reservoir, a pedal feel simulator, and the pressure building device according to any one of claims 1 to 8, wherein the electronic control unit, the master cylinder, the fluid reservoir, and the pedal feel simulator are all connected to the valve block assembly of the pressure building device.

10. A vehicle, characterized in that: The vehicle includes the pressure building device according to any one of claims 1 to 8.

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