WO2023097511A1

WO2023097511A1 - Position sensor, braking device, and assembly method

Info

Publication number: WO2023097511A1
Application number: PCT/CN2021/134626
Authority: WO
Inventors: 张鑫; 卢宇灏; 吴锁平; 张永生
Original assignee: 华为技术有限公司
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2023-06-08
Also published as: CN116711188A

Abstract

A position sensor (120), comprising: a housing (123), the housing (123) being provided with a bearing plate (1232), a first side of the bearing plate (1232) being provided with a cylindrical side wall (1231), the inner wall of the cylindrical side wall (1231) being provided with an axially through first guide structure, and further comprising a cover plate (121), an induction circuit board (122), and a sensor rotor (124), the sensor rotor (124) consisting of at least one blade (1241) and a cylindrical side wall (1242), the sensor rotor (124) being mounted on a motor, and the induction circuit board (122) sensing the actual position of the blade (1241) of the sensor rotor (124) on the basis of the principle of electric induction. The position sensor can be used for new energy vehicles, smart vehicles, etc. Also provided are a braking device comprising the position sensor (120) and an assembly method.

Description

A position sensor, braking device and assembly method

technical field

The embodiments of the present application relate to the braking field, and more specifically, relate to a position sensor, a braking device and an assembly method.

Background technique

The hydraulic mechanism of the brake device needs to continuously slide back and forth in the axial direction in order to quickly adjust the brake hydraulic pressure. The axial reciprocating movement depends on the anti-rotation mechanism for guidance and reversing support, and the reciprocating stroke depends on the precise control of the rotation angle of the motor. The brake system has many components and the external environment is complex, which poses a great test to the performance of the position sensor in terms of reliability, accuracy, and durability.

Contents of the invention

Embodiments of the present application provide a position sensor, a braking device and an assembly method, the position sensor has a long durability, a high reusability rate and is easy to assemble. Moreover, the embodiment of the present application provides an assembly method, by which the position sensor is assembled in the brake device, and the assembly process can be simplified.

In a first aspect, a position sensor is provided, including: a housing, the housing has a bearing plate; a cylindrical side wall is provided on the first side of the bearing plate, and at least one axial direction is provided on the inner wall of the cylindrical side wall The first guide structure that runs through.

It should be understood that the cylindrical side wall is used for the piston assembly in the brake system to move axially along the cylindrical side wall without rotating.

In some possible implementation manners, the bearing plate provided in the embodiment of the present application is a supporting member. In some possible implementations, the bearing plate provided in the embodiment of the present application is in the shape of a circular plate; of course, its shape may also be in a different shape, such as a square, an oval, or an irregular shape. In some possible implementation manners, the carrying board provided in the embodiments of the present application may be used to carry the sensing unit, the sensing circuit board or other components in the position sensor. In some possible implementation manners, the bearing plate provided in the embodiment of the present application can also reduce the influence of external force on the position sensor.

In some possible implementation manners, the bearing board and the housing provided in the embodiments of the present application are integrally formed. The shell with the bearing plate and the cylindrical side wall is manufactured by integral injection molding, which has a high degree of integration and facilitates assembly; or the above shell can be manufactured by other methods, which is not limited in the embodiment of the present application.

In some possible implementation manners, the first guide structure may be a guide rail structure, or may also be an axially penetrating recess or protrusion, or may be other forms of guide structures, which are not limited in this embodiment of the present application.

The position sensor for the braking system provided in the embodiment of the present application integrates the anti-rotation mechanism in the braking system with the housing of the position sensor by providing an anti-rotation structure with a guiding function on the housing of the position sensor. The assembly process of the brake system can be simplified, the assembly complexity can be reduced, and the time required for device assembly can be reduced. Furthermore, since the housing of the position sensor is provided with an anti-rotation structure with a guiding function, it is not necessary to separately fix the anti-rotation component in the hydraulic block through interference fit, which facilitates the disassembly of various components in the braking system. During the disassembly process, no Destroying the working surfaces of hydraulic blocks and anti-rotation structures increases the reusability of each component.

With reference to the first aspect, in some implementation manners of the first aspect, a first positioning reference is provided on the second side of the bearing plate, and the first positioning reference realizes the circumferential positioning of the position sensor in the brake device.

In some possible implementations, the first positioning reference may be a positioning pin, or a positioning hole, or may also be a convex portion or a concave portion, or may be other forms of positioning reference, which is not limited in this embodiment of the present application. . It should be understood that the first positioning reference may be one of the above various types of positioning references, or may be multiple types, which is not limited in this embodiment of the present application.

In some possible implementation manners, the first positioning reference can radially fix the position sensor on the hydraulic block.

In some possible implementations, when the piston assembly is driven by the motor screw to reciprocate along the guide structure, the torque of the motor screw may be transmitted to the position sensor, which may cause the position sensor to rotate and/or slip, Or cause deformation of the housing, thereby causing deformation of the induction circuit board. In the embodiment of the present application, the first positioning reference on the second side of the bearing plate can preliminarily fix the position sensor on the hydraulic block, thereby resisting the deformation, rotation and/or rotation of the housing caused by the torque of the motor screw being transmitted to the position sensor or slip.

With reference to the first aspect, in some implementation manners of the first aspect, a second positioning reference is set on the edge of the bearing plate, and the second positioning reference realizes the circumferential positioning of the position sensor in the brake device.

In some possible implementation manners, the second positioning reference may be a convex portion or a concave portion, or may be another form of positioning reference, which is not limited in this embodiment of the present application.

In some possible implementation manners, the second positioning reference can radially fix the position sensor on the motor.

It should be understood that the second positioning reference on the second side of the bearing plate can preliminarily fix the position sensor on the motor housing, thereby resisting the deformation, rotation and/or slippage of the housing caused by the torque of the motor screw being transmitted to the position sensor .

In the position sensor used in the braking system provided by the embodiment of the present application, the position of the position sensor in the braking device is circumferentially positioned by setting a positioning reference on the housing of the position sensor. Accurate positioning of the positioning reference not only reduces assembly complexity, but also prevents the torque of the motor screw from being transmitted to the position sensor.

With reference to the first aspect, in some implementation manners of the first aspect, a fastener through hole is provided on the bearing plate, and the fastener through hole axially fixes the position sensor in the brake device.

In some possible implementations, the through hole of the fastener cooperates with the fastener to axially fix the position sensor on the hydraulic block in the braking system; or, the through hole of the fastener cooperates with the fastener to fix the position sensor The sensor is fixed axially on the motor housing in the brake system.

It should be understood that the frictional force between the housing of the position sensor and the hydraulic block, or the frictional force between the housing of the position sensor and the motor can resist the torque transmitted to the housing by the screw rod of the motor, thereby preventing the position sensor from rotating or slipping. The cooperation between the fastener through hole and the fastener can also increase the frictional force between the position sensor housing and the hydraulic block or between the position sensor housing and the motor, thereby radially fixing the position sensor, Prevent its deformation, rotation and slippage.

In some possible implementation manners, the use of the bush to cooperate with the fastener can further increase the frictional force, thereby strengthening the radial fixation of the fastener to the position sensor.

The position sensor for the braking system provided by the embodiment of the present application is provided with a fastener through hole on the housing of the position sensor, and the position sensor is installed in the braking device through the fastener through hole and the fastener. The position of the motor is fixed axially and radially, which can prevent the torque of the motor screw from being transmitted to the position sensor.

With reference to the first aspect, in some implementations of the first aspect, the position sensor further includes: a cover plate and a sensing circuit board; the first side of the bearing plate and the cover plate form a closed space, and the sensing circuit board is set In the enclosed space formed by the bearing plate and the cover plate.

In some possible implementations, the cover plate and the bearing plate are both plate-shaped. When the two are placed in parallel, there will be a certain distance between them. Construct a closed space; or, manufacture a cover plate on the bearing plate by potting resin materials to realize the “enclosure” of the closed space, and then realize the sealing of the induction circuit board; or, realize the cover plate and the load-bearing The enclosure of the airtight space between the boards is not limited in this embodiment of the present application.

The position sensor used in the braking system provided by the embodiment of the present application isolates the induction circuit board of the electric induction position sensor from the oil environment through the housing and the cover plate, which can prevent the induction circuit board from being chemically corroded, thereby improving the performance of the position sensor. Stability, precision and longevity.

In a second aspect, a brake device is provided, and the brake device includes the position sensor in the first aspect or any implementation manner of the first aspect.

With reference to the second aspect, in some implementation manners of the second aspect, the brake device further includes a threaded rod and a piston assembly, the end of the piston assembly away from the hydraulic block has a recess, and the inner wall of the recess has a Thread structure; the outer wall of the first section of the recess of the piston assembly has a second guide structure matched with the first guide structure of the cylindrical side wall.

With reference to the second aspect, in some implementations of the second aspect, the brake device further includes a hydraulic block, and when the position sensor includes at least a first positioning reference, the first side of the hydraulic block is provided with a third positioning reference , the third positioning reference cooperates with the first positioning reference to perform circumferential positioning of the hydraulic block and the position sensor.

With reference to the second aspect, in some implementation manners of the second aspect, the braking device further includes a motor, and when the position sensor includes at least a second positioning reference, a fourth positioning reference is provided on the inner wall of the motor casing, the The fourth positioning reference cooperates with the first positioning reference to perform circumferential positioning of the motor and the position sensor.

With reference to the second aspect, in some implementation manners of the second aspect, the first side of the hydraulic block is further provided with a fastener blind hole, and the fastener blind hole axially fixes the position sensor.

In a third aspect, a vehicle is provided, and the vehicle includes the position sensor in the first aspect or any implementation manner of the first aspect, or includes the braking device in the second aspect or any implementation manner of the second aspect.

In a fourth aspect, an assembling method is provided, the assembling method includes: circumferentially positioning the position sensor and the hydraulic block; fixing the position sensor axially on the first side of the hydraulic block by fasteners, the position sensor The casing includes a cylindrical side wall, and the inner wall of the cylindrical side wall is provided with a first guiding structure axially penetrating.

The assembly method provided by the embodiment of the present application only needs one positioning to realize the assembly of the position sensor with the anti-rotation guiding structure in the braking device. There is no need to separately position the position sensor and the anti-rotation mechanism, the assembly process is simple, and the assembly complexity is low.

With reference to the fourth aspect, in some implementations of the fourth aspect, a first positioning datum is provided on the side of the bearing plate of the housing that is in contact with the hydraulic block, and a third positioning reference is provided on the first side of the hydraulic block. Reference, the circumferential positioning of the position sensor and the hydraulic block can be specifically: the circumferential positioning of the position sensor and the hydraulic block through the first positioning reference and the third positioning reference, the first positioning reference and the Compatible with the third positioning datum.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, a through hole for a fastener is provided on the bearing plate of the housing, and a blind hole for a fastener is provided on the first side of the hydraulic block. The firmware axially fixes the position sensor on the first side of the hydraulic block. Specifically, the fastener passes through the fastener through hole and the fastener blind hole and axially fixes the position sensor on the first side of the hydraulic block. The first side of the hydraulic block, the fastener through hole and the fastener blind hole cooperate with the fastener.

In the assembly method provided by the embodiment of the present application, the position sensor with the guide structure is pre-assembled on the hydraulic block through the positioning reference, and then the position sensor is fixed radially and axially on the hydraulic block through fasteners. The assembly process is simple, and the rotation of the position sensor caused by the torque of the screw rod of the motor can also be avoided.

In a fifth aspect, an assembly method is provided, the assembly method includes: fixing the position sensor and the motor in the circumferential direction; fixing the position sensor axially between the motor and the hydraulic block, and the housing of the position sensor includes a first A cylindrical side wall, the inner wall of the first cylindrical side wall is provided with a first guiding structure axially penetrating.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, a second positioning reference is provided on the edge of the bearing plate of the housing, a fourth positioning reference is provided on the inner wall of the housing of the motor, and the pair of position sensors and the motor Circumferential positioning may specifically be: perform circumferential positioning of the position sensor and the motor through the second positioning reference and the fourth positioning reference, and the second positioning reference cooperates with the fourth positioning reference.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the axial fixing of the position sensor between the motor and the hydraulic block is specifically: axially fixing the position sensor to the motor through a fastening member superior.

Description of drawings

Fig. 1 is a schematic block diagram of a vehicle provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of a three-dimensional structure of a position sensor provided in an embodiment of the present application;

Fig. 3 is a schematic cross-sectional structure diagram of a braking device provided by an embodiment of the present application;

Fig. 4 is a schematic diagram of component assembly of a brake device provided in an embodiment of the present application;

Fig. 5 is a schematic cross-sectional structure diagram of another braking device provided by the embodiment of the present application;

Fig. 6 is a schematic diagram of component assembly of another position sensor provided by the embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings. For ease of understanding, the following uses the scene of vehicle driving as an example to introduce the applicable scene of the embodiment of the present application with reference to FIG. 1 .

FIG. 1 is a functional block diagram of a vehicle 200 including a braking device 100 provided by an embodiment of the present application. As shown in FIG. 1 , the vehicle 200 includes a braking device 100 , and the braking device 100 includes a position sensor 120 and a control module 180 . Further, the control module 180 includes a control substrate 181 and a motor 110 . The working process of the brake device 100 is as follows: during the working process of the motor 110, the rotation of the hollow rotor will drive the sensor rotor of the position sensor 120 to rotate; the position sensor 120 senses the actual position of the blade of the sensor rotor, and sends this position signal to Control module 180: The control module 180 controls the rotation direction and speed of the motor 110 in real time according to the output signal of the position sensor 120, drives the screw rod of the motor to rotate, and finally drives the piston assembly to perform axial linear reciprocating motion to realize active pressure building. In some possible implementations, the hydraulic block in the braking device 100 has a hydraulic circuit connected to the master cylinder and wheel brakes of the vehicle 200, so that the braking device 100 brakes the vehicle 200 through the brake fluid in the hydraulic circuit The pressure is adjusted, thereby controlling the braking torque of the vehicle 200 during running.

In some possible implementations, the above vehicle 200 may include one or more different types of vehicles, and may also include one or more different types of vehicles on land (for example, roads, roads, railways, etc.), water ( For example: waterways, rivers, oceans, etc.) or means of transport or movable objects that operate or move in space. For example, a vehicle may include a car, a bicycle, a motorcycle, a train, a subway, an airplane, a ship, an aircraft, a robot, or other types of transportation means or movable objects, which are not limited in this embodiment of the present application.

It should be understood that the above-mentioned components are just an example, and in practical applications, components in the above-mentioned units may be added or deleted according to actual needs.

As mentioned above, the hydraulic mechanism of the brake device needs to continuously slide back and forth in the axial direction in order to quickly adjust the brake hydraulic pressure. The axial reciprocating movement depends on the anti-rotation mechanism for guidance and reversing support, and the reciprocating stroke depends on the precise control of the rotation angle of the motor. Specifically, in a type of braking device, the position sensor includes a stator support and a stator; wherein, the stator support is fixed on the bottom surface of the hydraulic block; the upper part of its anti-rotation mechanism is fixed in the hydraulic block through radial interference fit, The lower part is inserted into the hollow rotor of the motor, and the follower (such as the piston assembly) is fixed in the anti-rotation mechanism through the keyway that penetrates up and down. Since the anti-rotation mechanism is connected to the hydraulic block through interference fit, it is easier to destroy the matching properties between the two when disassembling, damage the working surface, and reduce the reuse rate of parts. In addition, the environment in which the braking system is located is relatively complex, which may affect the accuracy and reliability of its signals. It can be seen that the brake system has many components and the external environment is complex, which poses a great test to the performance of the position sensor in terms of reliability, accuracy, and durability.

In view of this, the embodiment of the present application provides a position sensor and a braking device, by using a position sensor based on the principle of electric induction, to avoid the complex magnetic field environment where the braking device is located from affecting the accuracy of the sensor; by combining the anti-rotation mechanism with the position sensor The shell is integrated to reduce the time required for device assembly and reduce the complexity of assembly; and the sensing circuit board of the sensor is sealed to protect the position sensor from chemical corrosion of the oil inside the brake device, thereby improving the performance of the position sensor and brake device. stability and lifespan.

Specifically, FIG. 2 to FIG. 6 show several schematic structural diagrams of the position sensor and the braking device provided by the embodiment of the present application. The structure and composition of the position sensor and the braking device provided by the embodiment of the present application will be described in detail below with reference to FIG. 2 to FIG. 6 .

FIG. 2 shows a schematic perspective view of a position sensor 120 provided by an embodiment of the present application. Specifically, the position sensor 120 includes: a cover plate 121 , a sensing circuit board 122 , and a housing 123 . Wherein, the housing 123 has a cylindrical side wall 1231 , a bearing plate 1232 and a terminal post 1233 . The carrying plate 1232 is used to carry the induction circuit board 122. One end of the cylindrical side wall 1231 is arranged on one side of the carrying plate 1232. The position where the carrying plate 1232 meets the cylindrical side wall 1231 has a through hole penetrating the carrying plate 1232. The inner diameter of the through hole is equal to the inner diameter of the cylindrical side wall 1231 . The inner surface of the cylindrical side wall 1231 is provided with one or more axially penetrating guide structures, so that the piston assembly in the braking device can move axially along the cylinder under the drive of the motor screw without turn. In some possible implementation manners, the guide structure may be an axial groove or an axial ridge, which is not limited in this embodiment of the present application. The side of the bearing plate 1232 provided with the cylindrical side wall 1231 is sealed and connected with the cover plate 121 to form a closed space, and the induction circuit board 122 is sealed in the closed space formed by the cover plate 121 and the bearing plate 1232 . The terminal 1233 is arranged on the other side of the bearing plate 1232, and this structure is used for electrically connecting the sensor 120 with the control substrate of the braking device. In some possible implementation manners, the electrical connection may be through a connector, or through a spring contact or a metal contact, which is not limited in this embodiment of the present application.

It should be noted that the cylindrical side wall 1232 is used to prevent the piston assembly from rotating. In some possible implementations, when the head of the piston assembly is cylindrical, the cylindrical side wall 1232 can be a cylindrical side wall; When the head of the piston assembly is non-cylindrical, such as when the head of the piston assembly is an elliptical cylinder, the cylindrical side wall 1232 can be an elliptical side wall; or when the piston assembly is of other shapes, the cylindrical side wall 1232 Other shapes are also possible.

It should be understood that the central positions of the cover plate 121 and the induction circuit board 122 are provided with a through hole, the inner diameter of the hole on the cover plate 121 is equal to the diameter of the outer wall of the cylindrical side wall 1231, and the inner diameter of the hole on the induction circuit board 122 greater than or equal to the inner diameter of the cover plate 121 ; in addition, the circumferential dimension of the induction circuit board 122 is smaller than the circumferential dimension of the cover plate 121 , and the circumferential dimension of the cover plate 121 is smaller than the circumferential dimension of the bearing plate 1232 .

In some possible implementations, the position sensor 120 also includes a sensor rotor 124, the sensor rotor 124 is composed of at least one vane 1241 and a cylindrical side wall 1242, and the outer diameter of the section of the cylindrical side wall 1242 away from the vane 1241 is in contact with the motor. The inner diameter of the hollow rotor is an interference fit, so that the sensor rotor 124 is assembled on the motor. After the sensor rotor 124 is assembled on the motor, a certain distance can be ensured between one end of the blade 1241 of the sensor rotor 124 and the cover plate 121 . There are excitation coils, induction coils and signal processing components on the induction circuit board 122 , and the actual position of the vane 1241 of the sensor rotor 124 is sensed based on the principle of electric induction. It should be understood that the inner diameter of the cylindrical sidewall 1242 of the sensor rotor 124 is larger than the outer diameter of the cylindrical sidewall 1231 of the housing 123 .

In some possible implementation manners, the position sensor 120 further includes a sealing ring 126 .

In some possible implementation manners, one or more positioning references 12351 may be further provided on the side of the carrying plate 1232 provided with the terminal post 1233 , and the positioning references 12351 may specifically be positioning pins or positioning holes. In some possible implementation manners, a positioning reference 12352 can also be set on the edge of the bearing plate 1232. The positioning reference 12352 can specifically be a protrusion or a recess on the edge of the bearing plate 1232. The embodiment of the present application defines the shape of the positioning reference 12352 Not limited. It should be understood that the

above positioning references

12351 and 12352 are used to pre-assemble the position sensor 120 in the braking device, and have the function of preventing the position sensor 120 from rotating.

In some possible implementations, one or more fastener through holes 1236 are provided on the part of the bearing plate 1232 that is not in contact with the cover plate 121, and the one or more fastener through holes 1236 are matched with the fasteners. , fix the position sensor 120 on the hydraulic block. In some possible implementations, the one or more fastener through holes 1236 are evenly distributed on the edge of the part of the bearing plate 1232 that is not in contact with the cover plate 121 . In some possible implementations, the one or more fastener through holes 1236 can be provided as a set with the positioning pins on the bearing plate 1232, that is, as shown in FIG. Fastener through holes 1236 . It should be understood that the engagement of the fastener through hole 1236 with the fastener can also prevent the position sensor 120 from rotating.

In some possible implementation manners, at least one through hole 1234 is provided on the part of the carrying plate 1232 that is not in contact with the cover plate 121 , and the through hole 1234 is used to avoid the three-phase line of the assembled motor. It should be understood that the shape of the through hole 1234 may be circular, rectangular or other shapes, which is not limited in this embodiment of the present application.

In some possible implementation manners, the shape of the induction circuit board 122 may be a ring or an arc, which is not limited in this embodiment of the present application.

In some possible implementation manners, the carrying plate 1232 may be in the shape of a disc, a cuboid, or other shapes, which are not limited in this embodiment of the present application.

In some possible implementations, the sealing of the induction circuit board 122 can be achieved by a sealing ring, that is, a sealing ring is provided between the cover plate 121 and the housing 123; or, the sealing of the induction circuit board 122 can be achieved by potting resin Material implementation, that is, the cover plate 121 is manufactured on the housing 123 by potting resin; or the sealed space between the cover plate 121 and the housing 123 is manufactured by other methods such as laser welding or glue sealing, which is not done in the embodiment of the present application. limited.

The position sensor provided by the embodiment of the present application isolates the sensing circuit board of the position sensor from the oil environment through the housing, which can prevent the sensing circuit board from being chemically corroded, thereby improving the stability, accuracy and life of the sensor. Moreover, by providing an anti-rotation structure with a guiding function on the housing of the position sensor, the time required for device assembly can be reduced, and the assembly complexity can be reduced.

FIG. 3 and FIG. 4 respectively show a schematic cross-sectional structure diagram and a schematic diagram of component assembly of a braking device provided by an embodiment of the present application. As shown in FIG. 3 , the braking device 100 includes: a motor 110 , a position sensor 120 , a screw rod 130 , a hydraulic block 140 , a piston assembly 150 , a fastener 160 , a piston cylinder liner 170 and a control module 180 . The position sensor 120 can be the position sensor in the above embodiments, including a cover plate 121 , a sensing circuit board 122 , a housing 123 and a sensor rotor 124 , and the housing 123 has a cylindrical side wall 1231 , a bearing plate 1232 and a terminal post 1233 . In the braking device 100, one end of the screw rod 130 extends into the piston assembly 150 to drive the piston assembly 150 to perform axial linear reciprocating motion, and the other end of the screw rod 130 is fixedly connected with the hollow rotor 111 of the motor 110, and the sensor The end of the rotor 124 away from the blade 1241 is fixedly connected to the hollow rotor 111 , so that the screw rod 130 and the sensor rotor 124 can rotate synchronously with the hollow rotor 111 . Specifically, the outer diameter of the end of the sensor rotor 124 away from the blade 1241 is connected to the inner diameter of the hollow rotor 111 through radial interference fit.

As shown in Fig. 4, the hydraulic block 140 has two round holes penetrating up and down, and one of the round holes 1401 is located at the center of the hydraulic block 140, which is used for the linear reciprocating movement of the piston assembly, thereby adjusting and controlling the circulation of the brake fluid in the hydraulic circuit , its inner diameter matches the outer diameter of the closed end of the piston assembly 150; the other round hole 1402 is located at a position deviated from the center of the hydraulic block, and is used to assemble the terminal post 1233 of the position sensor 120, and its inner diameter matches the terminal post of the position sensor 120 The outer diameter of 1233 matches. In some possible implementations, the connection between the terminal post 1233 and the hydraulic block 140 is sealed by the sealing ring 126 to isolate the motor environment from the control module 180 . The hydraulic block 140 is also provided with a through hole 1403 through which the three-phase line 113 of the motor 110 can pass, and the embodiment of the present application does not limit the shape of the through hole 1403 . The side of the hydraulic block 140 in contact with the control module 180 is equipped with a piston-cylinder liner 170 to isolate the environment of the motor from the control module 180 .

In some possible implementation manners, the side of the hydraulic block 140 in contact with the position sensor 120 has one or more positioning references 1405 that match the positioning references 1232 on the position sensor 120 , so as to facilitate assembly. It should be understood that the circular hole 1402 can also be regarded as a positioning reference.

In some possible implementations, the side of the hydraulic block 140 in contact with the position sensor 120 has one or more fastener blind holes 1404, and the distribution of the fastener blind holes 1404 is similar to that on the bearing plate 1232 of the position sensor 120. The fastener through hole 1236 cooperates, and the position sensor 120 and the hydraulic block 140 are axially fixed by the fastener 160 via the fastener through hole 1236 and the fastener blind hole 1404 . It should be understood that the blind hole of the fastener is a hole that connects the surface layer and does not penetrate the entire plate. It should be understood that the fastener 160 can prevent the position sensor 120 from rotating. In some possible implementation manners, a bush is used to cooperate with the fastener 160 to increase the frictional force between the fastener 160 and the position sensor 120 and strengthen the anti-rotation effect of the fastener 160 .

The piston assembly 150 is used to convert the rotary motion of the screw rod 130 into a linear motion. It has a head and a waist. The head 1501 is a circular plate structure. The inner diameters match; the waist is made up of two sections of cylindrical side walls, the outer diameter of the cylindrical side wall 1502 next to the head is smaller than the diameter of the head 1501; The inner diameter of the cylindrical side wall 1231 matches, and its outer wall has a through groove that matches the axial guide structure of the inner wall of the cylindrical side wall 1231 on the cover plate 121; the inner wall of the piston assembly 150 has a Fitting internal thread structure. In some possible implementations, the waist of the piston assembly 150 consists only of the cylindrical sidewall 1503 .

In some possible implementation manners, the fastener 160 may specifically be at least one of screws, bolts, studs, pins, rivets, etc., and the embodiment of the present application does not limit the type of the fastener 160 .

In some possible implementations, an assembly method of the braking device 100 is as follows: ① Assemble the screw rod 130 to the motor 110; ② Pre-assemble the position sensor 120 to the hydraulic block 140 through the fastener 160; ③ Then assemble the piston assembly 150 into the cylindrical side wall 1231 of the housing 123 of the position sensor 120 ; ④ Install and fix the motor 110 and the hydraulic block 140 . It should be understood that before the motor 110 and the hydraulic block 140 are installed and fixed, the sensor rotor 124 of the position sensor 120 has been assembled on the hollow rotor 111 of the motor 110 through radial interference fit. In some possible implementation manners, the housing and the hydraulic block may be circumferentially positioned according to the positioning references on the position sensor housing 123 and the hydraulic block 140 , and finally axially fixed by the fastener 160 . In some possible implementations, the position sensor 120 and the hydraulic block 140 can be circumferentially positioned through the round hole 1402-the binding post 1233 and a pair of positioning references 1232-the positioning reference 1405; or a pair of positioning references 1232- The positioning datum 1405 and the round hole 1402-terminal post 1233 position the position sensor 120 and the hydraulic block 140 in the circumferential direction, which is not limited in this embodiment of the present application.

Further, the position sensor 120 is electrically connected to the control substrate 181 through the terminal post 1233 . A sealing ring 126 may be provided on the terminal post 1233 to isolate the motor cavity from the control module 180 . The motor 110 is electrically connected to the control board 181 through the three-phase line 113 . The control module 180 and the hydraulic block 140 are integrally sealed by sealing rings, sealing glue or laser welding to protect all electronic components inside.

In some possible implementations, another assembly method of the braking device 100 is as follows: firstly, the position sensor 120 is pre-assembled on the motor 110 through interference fit, and then the position sensor 120 is axially connected by the hydraulic block 140 and the motor 110 . direction, as shown in Figure 5 and Figure 6.

In some possible implementations, when assembled in this way, the edge of the bearing plate 1232 of the housing of the position sensor 120 has one or more positioning references 12352 (as shown in FIG. 6 ), and correspondingly, the inner wall of the housing of the motor 110 The positioning reference 114 matched with the positioning reference 12352 is also provided on the top. The above-mentioned positioning reference 12352 - positioning reference 114 may be a convex part - a concave part; or a concave part - a convex part; or may be other forms of positioning reference, which is not limited in this embodiment of the present application.

It should be understood that during the assembly process, the position sensor 120 and the motor 110 are positioned circumferentially by the positioning datum 12352 - the positioning datum 114 . Further, the position sensor 120 and the motor 110 are fixed radially and preliminarily axially through the interference fit between the outer diameter of the bearing plate 1232 of the housing of the position sensor 120 and the inner diameter of the housing of the motor 110 . Finally, the position sensor 120 is fixed axially twice through the axial interference fit between the motor 110 and the hydraulic block 140 , that is, the final axial fixing is completed.

In some possible implementation manners, other anti-rotation structures may also be provided to fix the position sensor 120 and the motor 110 in the circumferential and axial directions, such as fasteners such as buckles and riveting, which are not limited in this embodiment of the present application.

It should be noted that when disassembling the devices assembled by the above two methods, the disassembly can be carried out respectively through the reverse process of the assembly steps. It should also be noted that the above assembly and disassembly process may be implemented by manual assembly or automated assembly, which is not limited in this embodiment of the present application.

It should be understood that during the working process of the hydraulic brake device, the sensor rotor 124 will rotate synchronously with the hollow rotor 111 of the motor 110, the position sensor 120 senses the actual position of the sensor rotor 124 through the principle of electric induction, and sends the position signal through the wiring The column is sent to the control module. The control module controls the rotation of the motor 120 in real time through the three-phase line 113 according to the output signal of the position sensor 120, thereby driving the screw rod 130 to rotate, and the screw rod 130 drives the piston assembly 150 along the inner wall of the cylindrical side wall 1231 on the position sensor housing 123 The guide structure performs linear reciprocating motion, so as to realize active pressure building. The hydraulic block 140 has a hydraulic circuit connected to the master cylinder and the wheel brakes, so that the brake fluid passes through the hydraulic circuit for brake pressure regulation.

The assembly process of the braking device provided by the embodiment of the present application is simple, and the assembly complexity is reduced by setting various positioning references, which is more conducive to the implementation of automatic assembly; by using the position sensor based on the principle of electric induction, it is possible to avoid The complex magnetic field environment affects the accuracy of the sensor; and sealing the induction circuit board of the position sensor can protect the position sensor from the chemical corrosion of the oil inside the brake device, thereby improving the stability and life of the brake device.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

The above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application. Should be covered within the protection scope of this application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims

A position sensor (120), characterized by comprising: a housing (123), the housing (123) having a bearing plate (1232);

The first side of the bearing plate (1232) is provided with a cylindrical side wall (1231), and the inner wall of the cylindrical side wall (1231) is provided with a first guiding structure axially penetrating.
The position sensor (120) according to claim 1, characterized in that, the second side of the bearing plate (1232) is provided with a first positioning reference (12351), and the first positioning reference (12351) is used to realize Circumferential positioning of the position sensor (120).
The position sensor (120) according to claim 1 or 2, characterized in that, a second positioning reference (12352) is set on the edge of the bearing plate (1232), and the second positioning reference (12352) is used to realize the Circumferential positioning of the position sensor (120).
The position sensor (120) according to any one of claims 1 to 3, characterized in that, the bearing plate (1232) is provided with a fastener through hole (1236), and the fastener through hole ( 1236) for axially fixing said position sensor (120).
The position sensor (120) according to any one of claims 1 to 4, characterized in that, the position sensor (120) further comprises: a cover plate (121) and a sensing circuit board (122);

The first side of the bearing plate (1232) and the cover plate (121) form a closed space, and the induction circuit board (122) is arranged in the closed space.
A brake device (100), characterized by comprising the position sensor (120) according to any one of claims 1-5.
The brake device (100) according to claim 6, characterized in that, the brake device (100) further comprises a screw rod (130) and a piston assembly (150), and the piston assembly (150) is away from the hydraulic block (140) has a concave portion at one end, and the inner wall of the concave portion has a thread structure matched with the screw rod (130);

The outer wall of the first section of the recess of the piston assembly (150) has a second guide structure matched with the first guide structure of the cylindrical side wall (1231).
The brake device (100) according to claim 6 or 7, characterized in that, the brake device (100) further includes a hydraulic block (140), and the position sensor (120) includes a first positioning reference (12351 ), the first side of the hydraulic block (140) is provided with a third positioning reference (1405), and the third positioning reference (1405) matches the first positioning reference (12351) to the hydraulic block ( 140) is circumferentially positioned with said position sensor (120).
The brake device (100) according to any one of claims 6 to 8, characterized in that, the brake device (100) further includes a motor (110), and the position sensor (120) includes a second positioning Reference (12352), the inner wall of the motor (110) housing is provided with a fourth positioning reference (113), the fourth positioning reference (113) cooperates with the second positioning reference (12352) to align the motor (110) performs circumferential positioning with the position sensor (120).
The brake device (100) according to any one of claims 6 to 9, characterized in that, the first side of the hydraulic block (140) is also provided with a fastener blind hole (1404), so The blind fastener hole (1404) axially fixes the position sensor (120).
A vehicle, characterized by comprising the position sensor (120) according to any one of claims 1 to 5, or comprising the brake device (100) according to any one of claims 6 to 10.
An assembly method, characterized in that, comprising:

Circumferentially positioning the position sensor (120) and the hydraulic block (140);

The position sensor (120) is axially fixed on the first side of the hydraulic block (140) by fasteners (160), and the housing (123) of the position sensor (120) includes a cylindrical side wall ( 1231), the inner wall of the cylindrical side wall (1231) is provided with a first guiding structure axially penetrating.
The assembly method according to claim 12, characterized in that, the side of the bearing plate (1232) of the housing (123) in contact with the hydraulic block (140) is provided with a first positioning reference (12351), so The first side of the hydraulic block (140) is provided with a third positioning reference (1405), and the circumferential positioning of the position sensor (120) and the hydraulic block (140) includes: passing the first positioning reference (12351) and the third positioning reference (1405) perform circumferential positioning on the position sensor (120) and the hydraulic block (140), and the first positioning reference (12351) and the third positioning reference (1405) cooperate.
The assembly method according to claim 12 or 13, characterized in that, the bearing plate (1232) of the housing (123) is provided with fastener through holes (1236), and the hydraulic block (140) The first side is provided with a fastener blind hole (1404), and the position sensor (120) is axially fixed on the first side of the hydraulic block (140) by a fastener (160), including : the fastener (160) passes through the fastener through hole (1236) and the fastener blind hole (1404) to axially fix the position sensor (120) on the hydraulic block (140 ), the fastener through hole (1236) and the fastener blind hole (1404) cooperate with the fastener (160).
An assembly method, characterized in that, comprising:

Circumferentially positioning the position sensor (120) and the motor (110);

The position sensor (120) is axially fixed between the motor (110) and the hydraulic block (140), the housing (123) of the position sensor (120) includes a cylindrical side wall (1231), the The inner wall of the cylindrical side wall (1231) is provided with a first guiding structure axially penetrating.
The assembly method according to claim 15, characterized in that, the edge of the bearing plate (1232) of the housing (123) is provided with a second positioning datum (12352), and the inner wall of the housing of the motor (110) is provided with There is a fourth positioning reference (114), and the circumferential positioning of the position sensor (120) and the motor (110) includes: passing the second positioning reference (12352) and the fourth positioning reference (114 ) perform circumferential positioning on the position sensor (120) and the motor (110), and the second positioning reference (12351) cooperates with the fourth positioning reference (1405).
The assembly method according to claim 15 or 16, characterized in that said axially fixing the position sensor (120) between the motor (110) and the hydraulic block (140) comprises: by fastening A component axially fixes the position sensor (120) on the motor (110).