CN116711188A - Position sensor, brake device and assembly method - Google Patents
Position sensor, brake device and assembly method Download PDFInfo
- Publication number
- CN116711188A CN116711188A CN202180033629.4A CN202180033629A CN116711188A CN 116711188 A CN116711188 A CN 116711188A CN 202180033629 A CN202180033629 A CN 202180033629A CN 116711188 A CN116711188 A CN 116711188A
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- Prior art keywords
- position sensor
- positioning reference
- hydraulic block
- fastener
- positioning
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- 229920005989 resin Polymers 0.000 description 3
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
Abstract
A position sensor (120), comprising: a housing (123), the housing (123) having a carrier 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 guide structure which axially penetrates through the first guide structure; the intelligent motor also comprises a cover plate (121), an induction circuit board (122) and a sensor rotor (124), wherein the sensor rotor (124) consists of at least one blade (1241) and a cylindrical side wall (1242), the sensor rotor (124) is assembled on the motor, and the induction circuit board (122) senses the actual position of the blade (1241) of the sensor rotor (124) based on the electric induction principle and can be used for new energy automobiles, intelligent automobiles and the like. A brake device including a position sensor (120) and a method of assembly are also provided.
Description
The embodiment of the application relates to the field of braking, in particular to a position sensor, a braking device and an assembly method.
The hydraulic mechanism of the brake device is required to constantly axially reciprocate so as to rapidly adjust the brake hydraulic pressure. The axial reciprocating motion is guided and commutated supported by an anti-rotation mechanism, and the reciprocating stroke is controlled by the rotation angle of the motor precisely. The brake system has a plurality of parts, is complex in external environment, and has great performance in the aspects of reliability, precision, durability and the like of the position sensor.
Disclosure of Invention
The embodiment of the application provides a position sensor, a braking device and an assembling method. In addition, the embodiment of the application provides an assembling method, by which the position sensor is assembled in the braking device, so that the assembling process can be simplified.
In a first aspect, there is provided a position sensor comprising: a housing having a carrier plate; the first side of the bearing plate is provided with a cylindrical side wall, and the inner wall of the cylindrical side wall is provided with at least one first guide structure penetrating axially.
It will be appreciated that the cylindrical side wall is used for axial movement of the piston assembly along the cylindrical side wall in a brake system without rotation.
In some possible embodiments, the carrier plate provided in the embodiments of the present application is a support. In some possible embodiments, the carrier plate provided in the embodiments of the present application is a plate; of course, the shape may be a special shape, such as square, oval, irregular shape, etc. In some possible implementations, the carrier plate provided by the embodiments of the present application may be used to carry the sensing unit or the sensing circuit board or other parts in the position sensor. In some possible embodiments, the bearing plate provided by the embodiment of the application can also reduce the influence of external force on the position sensor.
In some possible implementations, the carrier plate 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 an integral injection molding method, so that the integration level is high, and the assembly is facilitated; alternatively, the housing may be manufactured by other methods, which are not limited in this embodiment of the present application.
In some possible implementations, the first guiding structure may be a guide rail structure, or may also be a concave or convex portion that penetrates axially, or may also be another form of guiding structure, which is not limited by the embodiment of the present application.
According to the position sensor for the braking system, provided by the embodiment of the application, the anti-rotation structure with the guiding function is arranged on the shell of the position sensor, so that the anti-rotation mechanism in the braking system is integrated with the shell of the position sensor, the assembly flow of the braking system can be simplified, the assembly complexity is reduced, and the time required for assembling the device is shortened. Further, because the anti-rotation structure with the guiding function is arranged on the shell of the position sensor, the anti-rotation component is not required to be fixed in the hydraulic block through interference fit, the disassembly of each component in the brake system is convenient, the working surfaces of the hydraulic block and the anti-rotation structure cannot be damaged in the disassembly process, and the recycling rate of each component can be improved.
With reference to the first aspect, in certain implementations of the first aspect, the second side of the carrier plate is provided with a first positioning reference that enables 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 protrusion or a recess, or may also be another form of positioning reference, which is not limited by the embodiment of the present application. It should be understood that the first positioning reference may be one of the above-mentioned types of positioning references, or may be multiple types of positioning references, which are not limited by the embodiment of the present application.
In some possible implementations, the first positioning reference may 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, torque of the motor screw may be transmitted to the position sensor, which may result in rotation and/or sliding of the position sensor, or deformation of the housing, which may result in deformation of the sensing circuit board. In the embodiment of the application, the first positioning reference on the second side of the bearing plate can preliminarily fix the position sensor on the hydraulic block, so that deformation, rotation and/or sliding of the shell caused by the fact that the torque of the motor screw is transmitted to the position sensor are resisted.
With reference to the first aspect, in certain implementations of the first aspect, the carrier plate edge is provided with a second positioning reference that enables circumferential positioning of the position sensor in the brake device.
In some possible implementations, the second positioning reference may be a protrusion or a recess, or may be another form of positioning reference, which is not limited by the embodiment of the present application.
In some possible implementations, the second positioning reference may fix the position sensor radially on the motor.
It will be appreciated that the second locating datum on the second side of the carrier plate enables the primary fixing of the position sensor to the motor housing, thereby resisting deformation, rotation and/or slippage of the housing caused by torque transfer from the motor lead screw to the position sensor.
According to the position sensor for the braking system, provided by the embodiment of the application, the position of the position sensor in the braking device is circumferentially positioned by arranging the positioning reference on the shell of the position sensor. Through the accurate positioning of the positioning reference, the assembly complexity can be reduced, and the torque of the motor screw rod can be prevented from being transmitted to the position sensor.
With reference to the first aspect, in certain implementations of the first aspect, the carrier plate is provided with a fastener through hole that axially fixes the position sensor in the brake device.
In some possible implementations, the fastener through-hole cooperates with a fastener to axially secure the position sensor to a hydraulic block in the brake system; alternatively, the fastener through-hole cooperates with the fastener to axially secure the position sensor to the motor housing in the brake system.
It will be appreciated that the friction between the position sensor housing and the hydraulic block, or between the position sensor housing and the motor, is able to resist the torque transmitted to the housing by the motor lead screw, thereby preventing the position sensor from rotating or slipping. The through holes of the fastening pieces are matched with the fastening pieces, so that the friction force between the position sensor shell and the hydraulic block or between the position sensor shell and the motor can be increased, and further the radial fixing, deformation, rotation and sliding of the position sensor can be prevented.
In some possible implementations, the use of bushings in conjunction with the fastener can further increase friction, thereby enhancing the radial securement of the fastener to the position sensor.
According to the position sensor for the braking system, provided by the embodiment of the application, the position sensor is axially and radially fixed in the braking device by arranging the fastener through hole on the shell of the position sensor and matching the fastener through hole with the fastener, so that the torque of the motor screw rod can be prevented from being transmitted to the position sensor.
With reference to the first aspect, in certain implementations of the first aspect, the position sensor further includes: a cover plate and an induction circuit board; the first side of the bearing plate and the cover plate enclose a closed space, and the induction circuit board is arranged in the closed space formed by the bearing plate and the cover plate.
In some possible implementation manners, the cover plate and the bearing plate are both plate-shaped, when the cover plate and the bearing plate are placed in parallel, a certain distance exists between the cover plate and the bearing plate, and at the moment, a sealing ring is required to be used for surrounding the periphery of the cover plate and the bearing plate to construct a closed space; or, manufacturing a cover plate on the bearing plate through encapsulating resin material to realize the enclosure of the closed space, thereby realizing the sealing of the induction circuit board; or, the enclosure of the closed space between the cover plate and the bearing plate is realized by other modes such as glue sealing, etc., which is not limited by the embodiment of the application.
According to the position sensor for the braking system, provided by the embodiment of the application, the induction circuit board of the electric induction position sensor is isolated from an oil environment through the shell and the cover plate, so that the induction circuit board is prevented from being chemically corroded, and the stability, the precision and the service life of the position sensor are improved.
In a second aspect, there is provided a brake device comprising the position sensor of the first aspect or any implementation of the first aspect.
With reference to the second aspect, in certain implementations of the second aspect, the brake device further includes a screw and a piston assembly, an end of the piston assembly facing away from the hydraulic block has a recess, and an inner wall of the recess has a thread structure that mates with the screw; the outer wall of the first section of the recess of the piston assembly has a second guide structure that mates with the first guide structure of the cylindrical side wall.
With reference to the second aspect, in certain implementation manners of the second aspect, the braking device further includes a hydraulic block, and when the position sensor includes at least a first positioning reference, a third positioning reference is disposed on a first side of the hydraulic block, and the third positioning reference cooperates with the first positioning reference to circumferentially position the hydraulic block and the position sensor.
With reference to the second aspect, in certain 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 disposed on an inner wall of the motor housing, and the fourth positioning reference cooperates with the first positioning reference to perform circumferential positioning on the motor and the position sensor.
With reference to the second aspect, in certain implementations of the second aspect, the first side of the hydraulic block is further provided with a blind fastener hole that axially secures the position sensor.
In a third aspect, there is provided a vehicle comprising the position sensor of the first aspect or any implementation of the first aspect or comprising the braking device of the second aspect or any implementation of the second aspect.
In a fourth aspect, there is provided an assembly method comprising: circumferential positioning is carried out on the position sensor and the hydraulic block; the position sensor is axially fixed on the first side of the hydraulic block through a fastener, the housing of the position sensor comprises a cylindrical side wall, and the inner wall of the cylindrical side wall is provided with a first guide structure which axially penetrates through the cylindrical side wall.
According to the assembly method provided by the embodiment of the application, the assembly of the position sensor with the anti-rotation guide structure in the braking device can be realized only by one-time positioning. The position sensor and the anti-rotation mechanism are not required to be positioned respectively, 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 side of the bearing plate of the housing, where the side contacts the hydraulic block, is provided with a first positioning reference, and the first side of the hydraulic block is provided with a third positioning reference, where the pair of position sensors performs circumferential positioning with the hydraulic block, specifically may be: and performing circumferential positioning on the position sensor and the hydraulic block through the first positioning reference and the third positioning reference, wherein the first positioning reference is matched with the third positioning reference.
With reference to the fourth aspect, in some implementations of the fourth aspect, a through hole of a fastener is provided on a bearing plate of the housing, and a blind hole of a fastener is provided on the first side of the hydraulic block, and the position sensor is axially fixed on the first side of the hydraulic block by the fastener, which may specifically be: the fastener passes through the fastener through hole and the fastener blind hole to axially fix the position sensor on the first side of the hydraulic block, and the fastener through hole and the fastener blind hole are matched with the fastener.
According to the assembly method provided by the embodiment of the application, the position sensor with the guide structure is preassembled on the hydraulic block through the positioning reference, and then the position sensor is radially and axially fixed on the hydraulic block through the fastener. The assembly flow is simple, and the rotation of the position sensor caused by the torque of the motor screw rod can be avoided.
In a fifth aspect, there is provided an assembly method comprising: fixing the position sensor and the motor in the circumferential direction; the position sensor is axially fixed between the motor and the hydraulic block, and the housing of the position sensor comprises a first cylindrical side wall, and a first guide structure axially penetrating through the inner wall of the first cylindrical side wall is arranged.
With reference to the fifth aspect, in some implementations of the fifth aspect, a second positioning reference is provided at an edge of the carrier plate of the housing, a fourth positioning reference is provided on an inner wall of the housing of the motor, and the pair of position sensors performs circumferential positioning with the motor, specifically may be: and carrying out circumferential positioning on the position sensor and the motor through the second positioning reference and the fourth positioning reference, wherein the second positioning reference is matched with the fourth positioning reference.
With reference to the fifth aspect, in certain implementations of the fifth aspect, the fixing the position sensor axially between the motor and the hydraulic block is specifically: the position sensor is axially fixed to the motor by a fastening member.
FIG. 1 is a schematic block diagram of a vehicle provided by an embodiment of the present application;
fig. 2 is a schematic perspective view of a position sensor according to an embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of a brake device according to an embodiment of the present application;
FIG. 4 is a schematic diagram illustrating assembly of components of a brake device according to an embodiment of the present application;
FIG. 5 is a schematic cross-sectional view of another brake device according to an embodiment of the present application;
fig. 6 is an assembly schematic diagram of components of another position sensor according to an embodiment of the present application.
The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings. For ease of understanding, a scenario in which an embodiment of the present application is applicable will be described below with reference to fig. 1, taking a scenario in which a vehicle is driven as an example.
Fig. 1 is a functional block diagram of a vehicle 200 incorporating a brake apparatus 100 according to an embodiment of the present application. As shown in fig. 1, the vehicle 200 includes a brake device 100, and the brake device 100 includes a position sensor 120 and a control module 180. Further, the control module 180 includes therein a control substrate 181 and a motor 110. The brake device 100 operates as follows: during the operation 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 the control module 180; the control module 180 controls the rotation direction and the rotation 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 blocks in the brake device 100 have hydraulic circuits connected to the master cylinder and the wheel brakes of the vehicle 200, so that the brake device 100 performs brake pressure adjustment on the vehicle 200 by the brake fluid in the hydraulic circuits, thereby controlling the braking torque of the vehicle 200 during traveling.
In some possible implementations, the vehicle 200 may include one or more different types of vehicles, and may also include one or more different types of vehicles or movable objects that operate or move on land (e.g., highways, roads, railways, etc.), on water (e.g., waterways, rivers, oceans, etc.), or in space. For example, the vehicle may include an automobile, a bicycle, a motorcycle, a train, a subway, an airplane, a ship, an aircraft, a robot, or other type of conveyance or movable object, etc., to which embodiments of the present application are not limited.
It should be understood that the above components are only an example, and in practical applications, components in the above units may be added or deleted according to actual needs.
As described above, the hydraulic mechanism of the brake device is required to constantly axially reciprocate so as to rapidly adjust the brake hydraulic pressure. The axial reciprocating motion is guided and commutated supported by an anti-rotation mechanism, and the reciprocating stroke is controlled by the rotation angle of the motor precisely. In particular, in one type of braking device, the position sensor includes a stator support and a stator; wherein, the stator support piece is fixed on the bottom surface of the hydraulic block; the upper part of the anti-rotation mechanism is fixed in the hydraulic block through radial interference fit, the lower part of the anti-rotation mechanism is inserted into the hollow rotor of the motor, and the driven part (such as a piston assembly) is fixed in the anti-rotation mechanism through a key slot which penetrates up and down. Because the anti-rotation mechanism is connected with the hydraulic block through interference fit, the fit property between the anti-rotation mechanism and the hydraulic block is easy to damage when the anti-rotation mechanism is detached, the working surface is damaged, and the recycling rate of parts is reduced. In addition, the braking system is in a complex environment, and the accuracy and reliability of signals of the braking system can be affected. Therefore, the brake system has a plurality of parts, is complex in external environment, and has great performance in the aspects of reliability, precision, durability and the like of the position sensor.
In view of this, the embodiment of the application provides a position sensor and a brake device, which avoid the influence of complex magnetic field environment where the brake device is located on the sensor precision by using the position sensor based on the electric induction principle; by integrating the anti-rotation mechanism with the housing of the position sensor, the time required for assembling the device is reduced, and the assembly complexity is reduced; and the induction circuit board of the sensor is sealed, so that the position sensor is prevented from being chemically corroded by oil in the brake device, and further the stability and the service life of the position sensor and the brake device are improved.
Specifically, fig. 2 to 6 show several schematic structural diagrams of the position sensor and the brake device provided by the embodiment of the present application. The structure and composition of the position sensor and the brake device according to the embodiment of the application will be described in detail with reference to fig. 2 to 6.
Fig. 2 shows a schematic perspective view of a position sensor 120 according to an embodiment of the application. Specifically, the position sensor 120 includes: cover 121, induction circuit board 122, casing 123. Wherein the housing 123 has a cylindrical sidewall 1231, a carrier plate 1232, and a post 1233. The bearing plate 1232 is used for bearing the induction circuit board 122, one end of the cylindrical side wall 1231 is arranged on one side of the bearing plate 1232, a through hole penetrating through the bearing plate 1232 is formed at the position where the bearing plate 1232 is connected with the cylindrical side wall 1231, and the inner diameter size of the through hole is equal to that of the cylindrical side wall 1231. The inner surface of the cylindrical sidewall 1231 is provided with one or more axially extending guide structures to enable the piston assembly in the brake assembly to move axially along the cylinder without rotation under the drive of the motor lead screw. In some possible implementations, the guiding structure may be an axial groove or an axial ridge, which is not limited by the embodiment of the present application. The side of the bearing plate 1232 provided with the cylindrical side wall 1231 is hermetically connected with the cover plate 121 to enclose 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 post 1233 is disposed on the other side of the carrier plate 1232, which is configured to electrically connect the sensor 120 with the control substrate of the brake device. In some possible implementations, the electrical connection may be through a connector connection, or may be through a spring contact or a metal contact, which is not limited by the embodiments of the present application.
It should be noted that the cylindrical sidewall 1232 is used to prevent the piston assembly from rotating, and in some possible implementations, when the head of the piston assembly is cylindrical, the cylindrical sidewall 1232 may be a cylindrical sidewall; 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 sidewall 1232 may be an elliptical sidewall; or when the piston assembly is otherwise shaped, the cylindrical sidewall 1232 may be otherwise shaped.
It should be understood that the center positions of the cover plate 121 and the sensing circuit board 122 are respectively provided with a through circular hole, the inner diameter of the circular 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 circular hole on the sensing circuit board 122 is larger than or equal to the inner diameter of the cover plate 121; in addition, the peripheral dimension of the sensing circuit board 122 is smaller than the peripheral dimension of the cover plate 121, and the peripheral dimension of the cover plate 121 is smaller than the peripheral dimension of the carrier plate 1232.
In some possible implementations, the position sensor 120 further includes a sensor rotor 124, the sensor rotor 124 being comprised of at least one vane 1241 and a cylindrical sidewall 1242, an outer diameter of the cylindrical sidewall 1242 distal from the vane 1241 section being in interference fit with an inner diameter of a hollow rotor of the motor, thereby assembling the sensor rotor 124 on the motor. After the sensor rotor 124 is assembled to the motor, a certain distance between one end of the vane 1241 of the sensor rotor 124 and the cover plate 121 can be ensured. On the inductive circuit board 122 there are excitation coils, inductive coils and signal processing elements, which sense the actual position of the blades 1241 of the sensor rotor 124 based on the principle of electric induction. It will be appreciated that the inner diameter dimension of the cylindrical sidewall 1242 of the sensor rotor 124 is greater than the outer diameter dimension of the cylindrical sidewall 1231 of the housing 123.
In some possible implementations, the position sensor 120 further includes a seal ring 126.
In some possible implementations, one or more positioning references 12351 may also be disposed on the side of the bearing plate 1232 where the post 1233 is disposed, where the positioning references 12351 may be specifically positioning pins or positioning holes. In some possible implementations, a positioning reference 12352 may also be disposed on an edge of the carrier plate 1232, where the positioning reference 12352 may specifically be a protrusion or a recess on the edge of the carrier plate 1232, and the shape of the positioning reference 12352 is not limited by the embodiment of the present application. It will be appreciated that the positioning references 12351 and 12352 described above are used to pre-assemble the position sensor 120 in the brake device and have the effect of preventing rotation of the position sensor 120.
In some possible implementations, the portion of the carrier plate 1232 not in contact with the cover plate 121 is further provided with one or more fastener through holes 1236, which one or more fastener through holes 1236 cooperate with fasteners to secure the position sensor 120 to the hydraulic block. In some possible implementations, the one or more fastener through holes 1236 are evenly distributed at the edge of the portion of the carrier plate 1232 that is not in contact with the cover plate 121. In some possible implementations, the one or more fastener through holes 1236 may be provided in a set with the locating pins on the carrier plate 1232, i.e., as shown in fig. 2, the edge of the carrier plate 1232 is provided with one fastener through hole 1236 immediately adjacent to the locating pins. It will be appreciated that the fastener through holes 1236 in cooperation with the fasteners also prevent rotation of the position sensor 120.
In some possible implementations, the portion of the carrier plate 1232 not in contact with the cover plate 121 is further provided with at least one through hole 1234, and the through hole 1234 is used to avoid the three-phase line of the assembled motor. It should be appreciated that the shape of the through hole 1234 may be circular, rectangular, or any other shape, and embodiments of the present application are not limited in this regard.
In some possible implementations, the sensing circuit board 122 may be annular or arc-shaped, which is not limited by the embodiment of the present application.
In some possible implementations, the carrier plate 1232 may be disc-shaped, rectangular parallelepiped, 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 may be achieved by a sealing ring, i.e. a sealing ring is provided between the cover plate 121 and the housing 123; alternatively, the sealing of the induction circuit board 122 may be achieved by a potting resin material, that is, the cover plate 121 is manufactured on the case 123 by potting resin; or by other means such as laser welding or glue sealing, the sealed space between the cover plate 121 and the housing 123, which is not limited in this embodiment of the present application.
According to the position sensor provided by the embodiment of the application, the induction circuit board of the position sensor is isolated from the oil environment through the shell, so that the induction circuit board is prevented from being chemically corroded, and the stability, the precision and the service life of the sensor are improved. In addition, by arranging the anti-rotation structure with the guiding function on the shell of the position sensor, the time required for assembling the device can be reduced, and the assembling complexity can be reduced.
Fig. 3 and fig. 4 respectively show a schematic cross-sectional structure and an assembled schematic of components of a braking device according to an embodiment of the present application. As shown in fig. 3, the braking device 100 includes: motor 110, position sensor 120, lead screw 130, hydraulic block 140, piston assembly 150, fastener 160, piston cylinder 170, and control module 180. The position sensor 120 may be a position sensor in the above embodiment, including a cover plate 121, a sensing circuit board 122, a housing 123, and a sensor rotor 124, wherein the housing 123 has a cylindrical sidewall 1231, a carrier plate 1232, and a 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, the other end of the screw rod 130 is fixedly connected with the hollow rotor 111 of the motor 110, and one end of the sensor rotor 124, which is away from the vane 1241, is fixedly connected with the hollow rotor 111, so that the screw rod 130 and the sensor rotor 124 can synchronously rotate along with the hollow rotor 111. Specifically, the outer diameter of the end of the sensor rotor 124 facing away from the vanes 1241 is connected to the inner diameter of the hollow rotor 111 by a radial interference fit.
As shown in fig. 4, the hydraulic block 140 has two circular holes penetrating up and down, wherein one circular hole 1401 is located at the center of the hydraulic block 140 for the linear reciprocating motion of the piston assembly, so as to regulate and control the circulation of the brake fluid in the hydraulic circuit, and the inner diameter of the circular hole cooperates with the outer diameter of the closed end of the piston assembly 150; another circular hole 1402 is located off-center from the hydraulic block for fitting a post 1233 of the position sensor 120 with an inner diameter that mates with the outer diameter of the post 1233 of the position sensor 120. In some possible implementations, the connection between the post 1233 and the hydraulic block 140 is sealed by a seal ring 126 to isolate the motor environment from the control module 180. The hydraulic block 140 is further 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 fitted with a piston cylinder sleeve 170 to isolate the motor environment from the control module 180.
In some possible implementations, the side of the hydraulic block 140 that contacts the position sensor 120 has one or more registration references 1405 that mate with registration references 1232 on the position sensor 120 to facilitate assembly. It should be appreciated that circular hole 1402 may also be considered a positioning reference.
In some possible implementations, the side of the hydraulic block 140 that contacts the position sensor 120 has one or more fastener blind holes 1404, the distribution of the fastener blind holes 1404 mating with fastener through holes 1236 on a carrier plate 1232 of the position sensor 120, the position sensor 120 being axially secured to the hydraulic block 140 by fasteners 160 via the fastener through holes 1236 and fastener blind holes 1404 described above. It should be understood that blind fastener holes are holes that connect the skin without going through the entire plate. It should be appreciated that the fastener 160 can prevent rotation of the position sensor 120. In some possible implementations, bushings are used in conjunction with the fastener 160 to increase friction between the fastener 160 and the position sensor 120, enhancing the anti-rotation effect of the fastener 160.
The piston assembly 150 is used for converting the rotary motion of the screw rod 130 into linear motion, and is provided with a head and a waist, wherein the head 1501 is of a circular plate structure, and the diameter of the head 1501 is matched with the inner diameter of a round hole 1401 penetrating through the center of the hydraulic block 140; the waist consists of two sections of cylindrical side walls, the outer diameter dimension of the cylindrical side wall 1502 adjacent the head being smaller than the diameter of the head 1501; the outer diameter of the cylindrical side wall 1503 facing away from the head mates with the inner diameter of the cylindrical side wall 1231 of the housing 123 and the outer wall thereof has a through recess which mates with the axial guiding structure of the inner wall of the cylindrical side wall 1231 on the cover 121; the inner wall of the piston assembly 150 has an internal thread structure that mates with the screw 130. In some possible implementations, the waist of the piston assembly 150 consists of only the cylindrical sidewall 1503.
In some possible implementations, the fastener 160 may specifically be at least one of a screw, a bolt, a stud, a pin, a rivet, etc., and the type of the fastener 160 is not limited by the embodiments of the present application.
In some possible implementations, one way of assembling the brake device 100 is as follows: (1) assembling the screw 130 to the motor 110; (2) the position sensor 120 is first preassembled to the hydraulic block 140 by fasteners 160; (3) the piston assembly 150 is then fitted into the cylindrical sidewall 1231 of the housing 123 of the position sensor 120; (4) the motor 110 is fixedly installed with the hydraulic block 140. It will be appreciated that the sensor rotor 124 of the position sensor 120 has been fitted to the hollow rotor 111 of the motor 110 by a radial interference fit prior to the motor 110 being mounted and secured to the hydraulic block 140. In some possible implementations, the housing and hydraulic block may be positioned circumferentially according to a positioning reference on the position sensor housing 123 and on the hydraulic block 140, ultimately secured axially by the fastener 160. In some possible implementations, position sensor 120 may be positioned circumferentially with hydraulic block 140 by circular hole 1402-post 1233 and a pair of positioning references 1232-positioning reference 1405; alternatively, position sensor 120 may be positioned circumferentially with respect to hydraulic block 140 by a pair of positioning fiducials 1232-1405 and circular holes 1402-posts 1233, which are not limiting in this embodiment of the application.
Further, the position sensor 120 is electrically connected to the control substrate 181 via a terminal 1233. A seal 126 may be provided on 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 a sealing ring, sealant or laser welding, etc. to protect all electronic components inside.
In some possible implementations, another way of assembling the brake device 100 is as follows: the position sensor 120 is preassembled on the motor 110 by an interference fit, and then the position sensor 120 is axially fixed by the hydraulic block 140 and the motor 110, as shown in fig. 5 and 6.
In some possible implementations, when assembled in this way, the edge of the carrier 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 positioning references 114 that mate with the positioning references 12352 are also provided on the inner wall of the housing of the motor 110. The positioning reference 12352-114 may be a convex-concave part; or may be concave-convex; or may be another form of positioning reference, which is not limited by the embodiment of the present application.
It should be appreciated that during assembly, the position sensor 120 and motor 110 are positioned circumferentially by the positioning fiducials 12352-114. Further, the position sensor 120 and the motor 110 are radially fixed and primarily axially fixed by an 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 secondarily fixed axially through the axial interference fit between the motor 110 and the hydraulic block 140, i.e., the final axial fixation is completed.
In some possible implementations, other anti-rotation structures may be provided to fix the position sensor 120 and the motor 110 circumferentially and axially, such as fastening components, for example, but not limited to, snaps, rivets, and the like.
When the device assembled in the two modes is disassembled, the disassembly is performed by a process opposite to the assembly process. It should be noted that, the above assembly and disassembly processes may be implemented by manual assembly or may be implemented by automated assembly, which is not limited in this embodiment of the present application.
It will be appreciated that during operation of the hydraulic brake device, the sensor rotor 124 will rotate in synchronism with the hollow rotor 111 of the motor 110, and the position sensor 120 will sense the actual position of the sensor rotor 124 by the principle of electrical induction and will transmit this position signal to the control module via the wiring terminals. 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, so as to drive the screw rod 130 to rotate, and the screw rod 130 drives the piston assembly 150 to perform linear reciprocating motion along the guide structure of the inner wall of the cylindrical side wall 1231 on the position sensor housing 123, so that active pressure building is realized. The hydraulic block 140 has a hydraulic circuit connected to the master cylinder and the wheel brakes such that brake fluid is subjected to brake pressure adjustment by the hydraulic circuit.
The brake device provided by the embodiment of the application has simple assembly procedures, reduces assembly complexity by arranging various positioning references, and is more beneficial to the implementation of automatic assembly; by using the position sensor based on the electric induction principle, the sensor precision can be prevented from being influenced by the complex magnetic field environment where the braking device is positioned; and the induction circuit board of the position sensor is sealed, so that the position sensor is prevented from being chemically corroded by oil in the braking device, and the stability and the service life of the braking device are further improved.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.
In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (17)
- A position sensor (120), comprising: a housing (123), the housing (123) having a carrier 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 guide structure penetrating axially.
- The position sensor (120) of claim 1, wherein the second side of the carrier plate (1232) is provided with a first positioning reference (12351), the first positioning reference (12351) being used for achieving circumferential positioning of the position sensor (120).
- The position sensor (120) of claim 1 or 2, wherein the edge of the carrier plate (1232) is provided with a second positioning reference (12352), the second positioning reference (12352) being used for achieving circumferential positioning of the position sensor (120).
- A position sensor (120) as claimed in any one of claims 1 to 3, characterized in that a fastener through-hole (1236) is provided in the carrier plate (1232), the fastener through-hole (1236) being used for axially fixing the position sensor (120).
- The position sensor (120) of any one of claims 1-4, wherein the position sensor (120) further comprises: a cover plate (121) and an induction circuit board (122);the first side of the bearing plate (1232) and the cover plate (121) enclose a closed space, and the induction circuit board (122) is arranged in the closed space.
- A brake device (100) characterized by comprising a position sensor (120) according to any one of claims 1 to 5.
- The brake apparatus (100) of claim 6, wherein the brake apparatus (100) further comprises a screw (130) and a piston assembly (150), the piston assembly (150) having a recess at an end facing away from the hydraulic block (140), an inner wall of the recess having a threaded configuration for mating with the screw (130);an outer wall of the first section of the recess of the piston assembly (150) has a second guiding structure that mates with the first guiding structure of the cylindrical side wall (1231).
- The brake apparatus (100) of claim 6 or 7, wherein the brake apparatus (100) further comprises a hydraulic block (140), the position sensor (120) comprises a first positioning reference (12351), a first side of the hydraulic block (140) is provided with a third positioning reference (1405), and the third positioning reference (1405) cooperates with the first positioning reference (12351) to circumferentially position the hydraulic block (140) and the position sensor (120).
- The brake apparatus (100) according to any one of claims 6 to 8, wherein the brake apparatus (100) further comprises a motor (110), the position sensor (120) comprises a second positioning reference (12352), a fourth positioning reference (113) is provided on an inner wall of a housing of the motor (110), and the fourth positioning reference (113) cooperates with the second positioning reference (12352) to circumferentially position the motor (110) and 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 further provided with a blind fastener hole (1404), the blind fastener hole (1404) axially securing the position sensor (120).
- A vehicle characterized by comprising a position sensor (120) according to any one of claims 1 to 5 or by comprising a braking device (100) according to any one of claims 6 to 10.
- A method of assembly, 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) through a fastener (160), and a shell (123) of the position sensor (120) comprises a cylindrical side wall (1231), and a first guide structure axially penetrating through the inner wall of the cylindrical side wall (1231).
- The assembly method according to claim 12, characterized in that a side of the carrier plate (1232) of the housing (123) in contact with the hydraulic block (140) is provided with a first positioning reference (12351), the first side of the hydraulic block (140) is provided with a third positioning reference (1405), the positioning sensor (120) being positioned circumferentially with the hydraulic block (140), comprising: -positioning the position sensor (120) and the hydraulic block (140) circumferentially by means of the first positioning reference (12351) and the third positioning reference (1405), the first positioning reference (12351) being co-ordinated with the third positioning reference (1405).
- The assembly method according to claim 12 or 13, wherein the carrier plate (1232) of the housing (123) is provided with a fastener through hole (1236), the first side of the hydraulic block (140) is provided with a fastener blind hole (1404), and the axially fixing the position sensor (120) to the first side of the hydraulic block (140) by means of a fastener (160) comprises: the fastener (160) axially secures the position sensor (120) to the first side of the hydraulic block (140) through the fastener through hole (1236) and the fastener blind hole (1404), the fastener through hole (1236) and the fastener blind hole (1404) being mated with the fastener (160).
- A method of assembly, 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) comprises a cylindrical side wall (1231), and a first guide structure axially penetrating through the inner wall of the cylindrical side wall (1231) is arranged.
- The assembling method according to claim 15, wherein the edge of the carrier plate (1232) of the housing (123) is provided with a second positioning reference (12352), the housing inner wall of the motor (110) is provided with a fourth positioning reference (114), and the positioning sensor (120) is circumferentially positioned with the motor (110), comprising: -positioning the position sensor (120) circumferentially with the motor (110) by means of the second positioning reference (12352) and the fourth positioning reference (114), the second positioning reference (12351) being co-ordinated with the fourth positioning reference (1405).
- The assembly method according to claim 15 or 16, wherein said axially fixing the position sensor (120) between the motor (110) and the hydraulic block (140) comprises: the position sensor (120) is axially fixed to the motor (110) by a fastening element.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2021/134626 WO2023097511A1 (en) | 2021-11-30 | 2021-11-30 | Position sensor, braking device, and assembly method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116711188A true CN116711188A (en) | 2023-09-05 |
Family
ID=86611403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180033629.4A Pending CN116711188A (en) | 2021-11-30 | 2021-11-30 | Position sensor, brake device and assembly method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN116711188A (en) |
| WO (1) | WO2023097511A1 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8727296D0 (en) * | 1987-11-20 | 1987-12-23 | Lucas Ind Plc | Hydraulic braking system |
| JP2015192459A (en) * | 2014-03-27 | 2015-11-02 | 株式会社ミツバ | Electric motor integrated actuator |
| KR102393657B1 (en) * | 2015-03-18 | 2022-05-03 | 제트에프 액티브 세이프티 게엠베하 | Electronic brake system using integrated sensor module and operation method thereof |
| GB201520343D0 (en) * | 2015-11-18 | 2015-12-30 | Trw Ltd | A position sensor assembly |
| US11130482B2 (en) * | 2018-06-29 | 2021-09-28 | Tse Brakes, Inc. | Brake chamber stroke sensor |
| CN109774693A (en) * | 2018-12-28 | 2019-05-21 | 联创汽车电子有限公司 | Actively build press mechanism |
| CN211335952U (en) * | 2019-11-20 | 2020-08-25 | 比亚迪股份有限公司 | Hydraulic unit for a brake system, brake system and motor vehicle |
| CN113008130B (en) * | 2021-03-10 | 2021-12-03 | 上海钧嵌传感技术有限公司 | Angle position sensor |
-
2021
- 2021-11-30 CN CN202180033629.4A patent/CN116711188A/en active Pending
- 2021-11-30 WO PCT/CN2021/134626 patent/WO2023097511A1/en active Application Filing
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| WO2023097511A1 (en) | 2023-06-08 |
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