KR102590727B1 - Hydraulic supply device - Google Patents

Abstract

A hydraulic pressure supply device is disclosed. According to one aspect of the present invention, a motor is coupled to a modulator block in which a flow path and a valve for controlling braking hydraulic pressure are provided, and has a stator and a rotor; a rotating shaft coupled to the rotor and rotating in conjunction with the rotor; A ball nut to which a piston is coupled to one side and connected by a ball screw on the same axis as the rotation axis to convert the rotational movement of the rotation axis into linear motion; An anti-rotation unit that prevents the rotation shaft and the ball nut from rotating together; And a sensor assembly that is coupled in a straight line on the same axis as the rotation shaft to measure the rotation amount of the rotation shaft, wherein the sensor assembly may be provided with a hydraulic pressure supply device that forms a preload in the axial direction when combined with the rotation shaft. You can.

Description

Hydraulic supply device}

The present invention relates to a hydraulic pressure supply device, and more specifically, to a hydraulic pressure supply device provided in an electronic brake system to generate hydraulic pressure.

In general, vehicles are essentially equipped with a brake system for braking, and recently, various types of electronic brake systems have been proposed to obtain stronger and more stable braking force. As an example, an intelligent integrated brake (IDB: Integrated Dynamic Brake) system is being proposed.

This integrated electronic brake system outputs the operation of the brake pedal as an electrical signal through a pedal displacement sensor, operates a motor, and converts the rotational force of the motor into linear motion to generate braking hydraulic pressure; and the fluid supply device. It includes a modulator block in which a plurality of valves are installed to control braking operations by receiving hydraulic pressure using the force generated by it, and an electronic control unit that controls the motor and valves.

Meanwhile, the integrated electronic brake system is further equipped with a motor position sensor (MPS: Motor Position Sensor) to measure the operating state of the motor, and through this, the forward distance of the piston by the amount of rotation generated from the motor is determined. At this time, a magnet is installed to transmit the rotation information of the motor to the electronic control unit, and it is very important to maintain the gap between the magnet and the motor position sensor, that is, the sensing unit.

In addition, rather than assembling the magnet directly to the motor, it must be assembled at the height based on the modulator block in the process line before final assembly. Additionally, a separate axis is required to connect the magnet to the rotor of the motor.

However, the rotating shaft of the motor is directly connected to the ball bearing, so there is a risk of damage to the mechanism when the magnet and shaft are pressed into the rotating shaft, so there is a problem that a separate device that reduces the pressing force, such as a tolerance ring, is needed. In addition, a separate process is required to adjust the height of the magnet based on the modulator block, and there is a problem that it is difficult to set the range of the assembly force (pressing force).

The hydraulic pressure supply device according to an embodiment of the present invention has a simple structure and allows installation of a magnet for a motor position sensor.

According to one aspect of the present invention, a motor is coupled to a modulator block in which a flow path and a valve for controlling braking hydraulic pressure are provided, and has a stator and a rotor; a rotating shaft coupled to the rotor and rotating in conjunction with the rotor; A ball nut to which a piston is coupled to one side and connected by a ball screw on the same axis as the rotation axis to convert the rotational movement of the rotation axis into linear motion; An anti-rotation unit that prevents the rotation shaft and the ball nut from rotating together; And a sensor assembly that is coupled in a straight line on the same axis as the rotation shaft to measure the amount of rotation of the rotation shaft. The sensor assembly may be provided with a hydraulic pressure supply device that forms a preload in the axial direction when coupled to the rotation shaft. You can.

In addition, the sensor assembly includes a shaft having an insertion groove formed in the longitudinal direction so that a portion of the rotating shaft is inserted and coupled; a holder whose one end is fixed to the end of the shaft and where a receiving space is provided at the other end; A magnet mounted in the receiving space of the holder; and an elastic member provided in the insertion groove and compressed by a certain amount when the rotation shaft is inserted.

In addition, the shaft may be further provided with a mounting portion that prevents the rotation shaft from being separated and restrains the shaft in the rotation direction of the rotation shaft.

In addition, the mounting portion includes an elastic piece that extends from the insertion portion to have an inner diameter larger than the diameter of the insertion portion, is elastically deformed when coupled to the rotation shaft, and has an anti-separation protrusion protruding inward. a rotation fixing surface provided so that a portion of the inner peripheral surface of the mounting portion has a flat surface; And it may include at least one slit formed by cutting along the longitudinal direction.

Additionally, the slit may be formed between the elastic piece and the rotation fixing surface.

In addition, it may further include a bearing that rotatably supports the shaft, and the bearing may be supported in a pump housing coupled to the modulator block to surround the piston and the shaft.

Additionally, the bearing may be provided to be supported on a step of the pump housing.

In addition, the rotation shaft has a predetermined length, a fixing portion coupled to the rotor is formed on one side of the rotation shaft, a coupling portion coupled to the sensor assembly is formed on the other side of the rotation shaft, and a connection portion is formed between one side and the other side of the rotation shaft. A screw groove may be formed on the outer peripheral surface of the middle portion.

Additionally, the coupling portion may include a pressing portion inserted into the sensor assembly; a support portion that protrudes in a radial direction from an end of the pressing portion and is provided to have a flat section along an outer circumferential surface; and a stepped portion formed between an end of the support portion and the middle portion to be stepped in an inward direction from the support portion.

In addition, the rotation prevention unit includes a sleeve provided between the rotor and the ball nut and having at least one slot along the moving direction of the piston; and a ring member coupled to the ball nut and provided with a constraining protrusion inserted into the slot, wherein the constraining protrusion moves along the slot when the piston operates and restricts the rotation of the ball nut. .

Additionally, the sleeve may be fixed to a motor housing surrounding the motor or the modulator block.

In addition, it may further include a pump housing that is fastened to the modulator block on the opposite side of the motor and forms a cylinder so that a piston penetrating the modulator block moves in a straight line.

Additionally, the pump housing may be provided with a cylindrical guide portion with one side open so that the cylinder is divided into a first space portion that accommodates the shaft and a second space portion that accommodates the piston.

The hydraulic pressure supply device according to an embodiment of the present invention has a simple structure and has the effect of improving manufacturing efficiency and reducing costs by fixing a magnet to a shaft that is coupled in line with the rotation axis.

In addition, by easily maintaining the gap between the magnet and the motor position sensor, it is possible to effectively determine the operating status of the motor.

In addition, the assembly force (pressing force) can be reduced compared to the conventional one, and the noise and durability of the bearing can be improved by forming a preload through the elastic member.

The present invention will be explained in detail with the drawings below, but since these drawings show preferred embodiments of the present invention, the technical idea of the present invention should not be construed as limited to the drawings.
1 is a cross-sectional view showing a hydraulic pressure supply device according to an embodiment of the present invention.
Figure 2 is a perspective view showing a portion of a rotating shaft provided in a hydraulic pressure supply device according to an embodiment of the present invention.
Figure 3 is a partially cut away perspective view showing a rotation prevention portion provided in a hydraulic pressure supply device according to an embodiment of the present invention.
Figure 4 is a perspective view showing a sensor assembly provided in a hydraulic pressure supply device according to an embodiment of the present invention.
FIG. 5 is a partially cut-away perspective view showing the shaft of the sensor assembly shown in FIG. 4.
Figures 6 to 8 are diagrams showing a state in which the rotation axis and sensor assembly of the hydraulic pressure supply device are assembled, respectively, according to an embodiment of the present invention.
9 and 10 are enlarged views of a portion of a hydraulic pressure supply device according to an embodiment of the present invention, respectively.
Figure 11 is a cross-sectional view showing the operating state of the hydraulic pressure supply device according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following examples are presented to sufficiently convey the idea of the present invention to those skilled in the art. The present invention is not limited to the embodiments presented herein and may be embodied in other forms. In order to clarify the present invention, the drawings may omit illustrations of parts unrelated to the description and may slightly exaggerate the sizes of components to aid understanding.

Figure 1 is a cross-sectional view showing a hydraulic pressure supply device according to an embodiment of the present invention, Figure 2 is a perspective view showing a part of a rotating shaft provided in the hydraulic pressure supply device according to an embodiment of the present invention, and Figure 3 is an embodiment of the present invention. It is a partially cut perspective view showing a rotation prevention part provided in a hydraulic pressure supply device according to an embodiment, Figure 4 is a perspective view showing a sensor assembly provided in a hydraulic pressure supply device according to an embodiment of the present invention, and Figure 5 is a sensor shown in Figure 4. It is a partially cut-out perspective view showing the shaft of the assembly, and Figures 6 to 8 are views showing the state in which the rotation axis and sensor assembly of the hydraulic pressure supply device according to an embodiment of the present invention are assembled, respectively, and Figures 9 and 10 are respectively shown. This is an enlarged view of a portion of a hydraulic pressure supply device according to an embodiment of the present invention, and Figure 11 is a cross-sectional view showing the operating state of the hydraulic pressure supply device according to an embodiment of the present invention.

1 to 11, the hydraulic pressure supply device 1 according to one aspect of the present invention includes a motor 100 coupled to the modulator block 10 and a rotor 120 of the motor 100. A rotation shaft 210, a ball nut 220 that is coupled to one side of the piston 230 and connected to the rotation shaft 210 in a ball screw manner, and a rotation mechanism that prevents the rotation shaft 210 and the ball nut 220 from rotating together. It includes a sensor assembly 500 coupled to the prevention unit 300 and the rotation shaft 210.

The modulator block 10 is connected to the hydraulic pressure supply device 1 and the master cylinder (not shown), and a flow path and valve for controlling the braking hydraulic pressure are provided therein. In addition, an electronic control unit (ECU) is installed in the modulator block 10, and the electronic control unit (ECU) controls the valve and the motor 100 of the hydraulic pressure supply device 1, thereby braking with the wheel cylinder provided on each wheel. It transmits hydraulic pressure. At this time, the electronic control unit (ECU) may be provided with a sensing unit (not shown) that detects changes in the magnetic field caused by the magnet 530 of the sensor assembly 500, which will be described later. Since the modulator block 10 is a well-known technology widely used in electronic brake systems, detailed description will be omitted.

A motor housing 101 and a pump housing 400 are fastened to both sides of the modulator block 10, respectively.

The motor housing 101 is fastened to the left side of the modulator block 10 with reference to FIG. 1 and is provided to surround the motor 100, which will be described later. Additionally, a motor cover 102 is interposed between the motor 100 and the modulator block 10 disposed in the motor housing 101. That is, the motor housing 101 is coupled to the motor cover 102 and fastened to the modulator block 10.

The pump housing 400 is fastened to the modulator block 10 on the opposite side of the motor housing 101, and forms a cylinder in which the piston 230 makes a linear reciprocating motion. At this time, a pump chamber 412 into which the working fluid flows is formed in the space between the cylinder and the piston 230, and a pump sealing member is formed between the outer surface of the pump housing 400 and the modulator block 10 to prevent the outflow of the working fluid. (425) is prepared.

According to one aspect of the present invention, the pump housing 400 may be provided with a cylindrical guide portion 410 with one side open to accommodate the shaft 510 of the sensor assembly 500, which will be described later. By this guide part 410, the cylinder can be divided into a first space part 411, which is an inner space of the guide part 410, and a second space part 412, which accommodates the piston 230. Additionally, a flow path 413 connected to the second space 412 may be formed in the pump housing 400. That is, the working fluid accommodated in the second space 412, which is the pump chamber 412, flows in and out of the internal passage of the modulator block 10 through the passage 413 according to the operation of the piston 230. The coupling structure of the pump housing 400 and the sensor assembly 500 and the operating state of the piston 230 will be described again below.

The motor 100 is a device that receives power and generates rotational force. The motor 100 may be a hollow motor equipped with a stator 110 and a rotor 120 installed within the motor housing 101. The rotor 120 has a cylindrical shape with an empty center, and magnetic materials 121 are installed at predetermined intervals along its outer peripheral surface. The stator 110 is spaced apart from the rotor 120 at a certain distance and is formed to surround the rotor 120. When a coil (not shown) is wound around the stator 110 and power is applied, repulsive and attractive forces are applied between the magnetic material 121 and the coil, causing the rotor 120 to rotate. Since the structure of the rotor 120 and stator 110 of the motor 100 is a well-known technology, detailed description will be omitted.

Meanwhile, as the hydraulic pressure supply device 1 of the present invention is applied to and used in an electronic brake system, the motor 100 operates through an electrical signal from a pedal displacement sensor (not shown) that detects displacement according to the pedal pressure. You can. In other words, it rotates forward and backward and generates rotational force to perform the braking force requested by the driver.

The rotation shaft 210 has a predetermined length and is disposed at the center of the motor 100 to rotate together with the rotor 120. As shown, the rotation shaft 210 may be arranged to rotate together with the rotating body 122 of the rotor 120.

The rotating body 122 may be hollow in the longitudinal direction so that the rotating shaft 210 is located inside. At this time, the rear side (left side with respect to FIG. 1) of the rotating body 122 is provided to have a reduced inner diameter and is coupled to rotate together with the rotating shaft 210. This rotating body 122 is supported on the front and rear sides by front bearings 132 and rear bearings 131, respectively, so that it can rotate stably together with the rotor 120.

The rear bearing 131 is sandwiched between the motor housing 101 and the rotating body 122 and supports the rear side of the entire body 122, and the front bearing 132 is between the motor cover 102 and the rotating body 122. It is interposed and supports the front side of the rotating body 122. That is, the front bearing 132 and the rear bearing 131 stably support the front and rear of the rotor 122, so that when the rotor 120 rotates, it rotates together with the rotor 122 without shaking.

The rotating shaft 210 may be press-fitted into the rotating body 122 or coupled with a spline structure to be provided as a screw shaft that rotates together with the rotating body 122. That is, the rotation shaft 210 has a predetermined length, a screw groove is formed on the outer peripheral surface, and the rear is fixed to the rear side of the rotation body 122, so that it rotates together with the rotation body 122.

More specifically, a fixing portion 211 coupled to the rotor 120 is formed on one side of the rotating shaft 210, and a coupling portion 215 coupled to a sensor assembly 500 to be described later is formed on the other side of the rotating shaft 210. is formed, and a screw groove may be formed on the outer peripheral surface of the middle portion 213 between one side and the other side of the rotation shaft 210.

The coupling portion 215 includes a pressing portion 216 inserted into the sensor assembly 500, a support portion 217 protruding radially from the end of the pressing portion 216, and an end and middle portion of the support portion 217. A step portion 218 formed to be stepped in an inward direction from the support portion 217 may be provided between the two sides (213). These pressing portions 216, support portions 217, and step portions 218 are formed sequentially in the longitudinal direction.

The support portion 217 is provided to have a certain section flat surface 217a along the outer peripheral surface. As shown, the support portion 217 is shown as having a pair of planes 217a facing each other with a phase difference of 180 degrees, but it is not limited to this, and may have the plane 217a only in at least a certain section. . This plane 217a serves to constrain the rotation axis 210 and the direction of rotation when assembling the sensor assembly 500. That is, the rotation shaft 210 and the sensor assembly 500 rotate together.

The pressing part 216 serves to press the elastic member 540 of the sensor assembly 500, which will be described later, and the step part 218 is provided to prevent separation when assembling the sensor assembly 500, and the rotation axis The assembly structure of 210 and sensor assembly 500 will be described again below.

The ball nut 220 is coupled to the rotation shaft 210 using a ball screw method to convert rotational motion into linear reciprocating motion. Although not shown, a plurality of balls may be filled between the rotating shaft 210 and the ball nut 220 to reduce energy due to friction. That is, the rotation shaft 210 and the ball nut 220 may be provided as a ball-screw type power conversion unit. A rotation prevention portion 300 is provided so that the ball nut 220 is converted into linear motion according to the rotation of the rotation shaft 210.

The rotation prevention unit 300 includes a sleeve 310 fixed to the motor housing 101 or the modulator block 10 and provided to surround the ball nut 220, and a ring coupled to the sleeve 310 to prevent rotation. A member 320 may be provided.

The sleeve 310 is formed to be hollow in the longitudinal direction so that the ball nut 220 is located inside, and at least one slot 311 is formed on the inner surface along the longitudinal direction. A plurality of slots 311 may be provided at equal intervals and spaced apart in parallel in the circumferential direction on the inner surface of the sleeve 310. In addition, the sleeve 310 may be arranged to be spaced apart from the rotating body 122 at a certain distance so as not to interfere with the rotor 120, and may have a flange 312 that is bent on the other side and fixed to the motor housing 101. You can. As shown, the flange 312 may be fixed to the motor cover 102. That is, as the sleeve 310 is fixed to the motor cover 102 fixed to the motor housing 101, the movement of the sleeve 310 is restricted.

The ring member 320 is press-fitted to the ball nut 220, and at least one restraining protrusion 321 is formed on the outer peripheral surface. The restraining protrusion 321 is provided at a position corresponding to the slot 311 and is inserted into the slot 311. Accordingly, the restraining protrusion 321 prevents the rotation of the ball nut 220 and moves along the slot 321 as the ball nut 220 moves.

Meanwhile, a piston 230 is coupled to one side of the ball nut 220 and performs a linear reciprocating motion together with the piston 230. The piston 230 has a hollow cylindrical shape, one end is coupled to the ball nut 220, and the other end is inserted into the cylinder of the pump housing 400. The rotating shaft 210 and the guide portion 410 of the pump housing 400 can be accommodated in the hollow portion 232 of the piston 230. At this time, a guide bush 231 may be provided between the inner surface of the piston 230 and the outer surface of the guide part 410. Accordingly, when the piston 230 moves in a straight line, the guide bush 231 is guided along the outer surface of the guide portion 410, thereby enabling the piston 230 to perform a stable linear motion. A sealing member 235 is provided between the outer surface of the piston 230 and the pump housing 400 and the inner surface of the piston 230 and the guide part 410 to prevent oil from leaking when the piston 230 operates. I do it.

The sensor assembly 500 is coupled to the rotation shaft 210 and serves to measure the rotation direction and rotation amount of the rotation shaft 210. Specifically, the sensor assembly 500 includes a shaft 510 connected in a straight line on the same axis as the rotation axis 210, a holder 520 fixed to the end of the shaft 510, and a holder 520 mounted on the holder 520. It may be provided with a magnet 530, an elastic member 540 inserted into the insertion groove 512 formed in the shaft 510, and a bearing 550 mounted on the outer peripheral surface of the shaft 510.

The shaft 510 has a predetermined length, and an insertion groove 512 is formed in the longitudinal direction so that a portion of the rotating shaft 210 is inserted and coupled. At this time, the shaft 512 may be further provided with a mounting portion 515 at the portion where the insertion groove 512 is formed to prevent the rotation shaft 210 from being separated and to restrain the shaft 510 in the rotation direction of the rotation shaft 210. .

The mounting portion 515 may extend from the insertion portion 512 to have an inner diameter larger than the diameter of the insertion portion 512 . This mounting portion 515 includes an elastic piece 518 that is elastically deformed when coupled to the rotating shaft 210, a rotation fixing surface 517 provided so that a portion of the inner peripheral surface of the mounting portion 515 has a flat surface, and a cut along the longitudinal direction. It may include at least one slit 516. At this time, the slit 516 is formed between the elastic piece 518 and the rotation fixing surface 517.

The elastic piece 518 and the rotation fixing surface 517 may be formed to repeat each other along the circumferential direction. As shown, the elastic piece 518 and the rotation fixing surface 517 each have a phase difference of 180 degrees and may be provided as a pair to face each other. The number of the elastic pieces 518 and the rotation fixing surfaces 517 can be selectively increased or decreased, but it is preferable that they are formed to correspond to the support portion 217 of the rotation shaft 210.

At the end of the elastic piece 518, a separation prevention protrusion 518a is provided protruding inward. This separation prevention protrusion 518a serves to prevent the rotation shaft 210 from being separated from the shaft 210 when coupled to the rotation shaft 210. For example, when the coupling portion 215 of the rotating shaft 210 is coupled through the mounting portion 515, the separation prevention projection 518a is pressed in the radial direction by the outer diameter of the support portion 217 that is larger than the inner diameter of the separation prevention projection 518a. This causes the elastic piece 518 to be elastically deformed. At this time, the elastic piece 518 can be easily elastically deformed by the slit 516. In this state, when the separation prevention protrusion 518a continues to advance and is seated on the step portion 218, the elastic piece 518 that has been elastically deformed returns to its original state. That is, the rear side of the departure prevention protrusion 518a is caught by the support portion 217 to prevent the rotation axis 210 from being separated.

In addition, when the support part 217 is inserted into the mounting part 515, the plane 217a of the support part 217 faces the plane 217a of the rotation fixing surface 517 of the mounting part 515. Accordingly, the plane 217a of the support part 217 and the rotation fixing surface 517 come into surface contact so that the rotation axis 210 and the shaft 510 rotate together.

Meanwhile, when the coupling part 215 is assembled to the mounting part 515, the pressing part 216 is inserted into the insertion part 512. That is, when the pressing part 216 is inserted into the insertion part 512, the elastic member 540 provided in the insertion part 512 is pressed. Accordingly, when the rotating shaft 210 is assembled to the shaft 510, the elastic member 540 is provided in a state in which the elastic member 540 is pressed by a certain amount by the pressing portion 216. At this time, the elastic member 540 may be provided as a coil spring, and is compressed according to the pressure of the pressing portion 216, thereby generating an elastic restoring force in the axial direction. Accordingly, the elastic restoring force provides a preload in the axial direction of the rotation axis 210 and the shaft 510.

As described above, when assembling the rotating shaft 210 to the sensor assembly 500, the insertion groove 512 guides the elastic member 540 and performs the function of aligning it with the rotating shaft 210, and after assembly, the elastic member ( 540) to provide preload. In addition, since the rotating shaft 210 and the shaft 510 are not press-fitted, it is possible to fundamentally solve the conventional problem caused by assembly force (pressing force).

One end of the holder 520 is fixed to the end of the shaft 510, and a receiving space in which a magnet 530 is installed is provided at the other end. That is, the holder 520 and the magnet 530 are provided on the opposite side of the shaft 510 coupled to the rotation axis 210. Accordingly, when the shaft 510 rotates together with the rotation axis 210, the holder 520 and the magnet 530 rotate together.

The bearing 550 is interposed between the outer surface of the shaft and the inner side of the guide portion to support the radial direction of the shaft 510 so that the shaft 510 and the magnet 530 can rotate stably. At this time, the bearing 550 may be installed so that one side is supported by the shaft 510 and the other side is supported by the step portion 415 of the guide portion 410. Accordingly, the preload generated by the elastic member 540 is applied to the bearing 550 to improve noise and durability of the bearing 550.

This sensor assembly 500 may include a sensing unit (not shown) provided in an electronic control unit (ECU). The sensing unit detects changes in the magnetic field caused by the magnet 530 and measures the rotation direction and amount of rotation of the rotation shaft 210. That is, based on the information detected by the sensing unit, the electronic control unit (ECU) can determine the movement of the piston 230 and control the operation of the motor 100.

As described above, although the present invention has been described with limited examples and drawings, the present invention is not limited thereto, and the technical idea of the present invention and the following will be understood by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalence of the patent claims to be described.

1: Hydraulic pressure supply device
10: Modulator block
100: motor
210: rotation axis
220: Ball nut
230: Piston
300: Anti-rotation part
400: Pump housing
500: Sensor assembly

Claims (13)

A motor coupled to a modulator block inside which a flow path and valve for controlling braking hydraulic pressure are provided, and having a stator and a rotor;
A rotating shaft coupled to the rotor and rotating in conjunction with the rotor;
A ball nut to which a piston is coupled to one side and connected by a ball screw on the same axis as the rotation axis to convert the rotational movement of the rotation axis into linear motion;
An anti-rotation unit that prevents the rotation shaft and the ball nut from rotating together; and
It includes a sensor assembly that is coupled in a straight line on the same axis as the rotation axis to measure the amount of rotation of the rotation axis,
When the sensor assembly is coupled with the rotation shaft, a preload is formed in the axial direction,
The sensor assembly includes a shaft having an insertion portion formed in the longitudinal direction so that a portion of the rotation shaft is inserted and coupled,
a mounting portion extending from the insertion portion to have an inner diameter larger than the diameter of the insertion portion;
An elastic piece that is elastically deformed when coupled to the rotating shaft and has a separation prevention protrusion protruding inward;
a rotation fixing surface provided so that a portion of the inner peripheral surface of the mounting portion has a flat surface; and
A hydraulic pressure supply device including at least one slit formed by cutting along the longitudinal direction. According to paragraph 1,
The sensor assembly is,
A holder with one end fixed to the end of the shaft and a receiving space provided at the other end;
A magnet mounted in the receiving space of the holder; and
A hydraulic pressure supply device comprising: an elastic member provided in the insertion portion and compressed by a certain amount when the rotation shaft is inserted. According to paragraph 1,
The mounting part
A hydraulic pressure supply device that prevents the rotation shaft from leaving and restrains the shaft in the rotation direction of the rotation shaft. delete According to paragraph 1,
The slit is a hydraulic pressure supply device formed between the elastic piece and the rotation fixing surface. According to paragraph 1,
Further comprising a bearing that rotatably supports the shaft,
The bearing is a hydraulic pressure supply device supported in a pump housing coupled to the modulator block to surround the piston and shaft. According to clause 6,
The bearing is a hydraulic pressure supply device provided to be supported on a step of the pump housing. According to paragraph 1,
The rotation axis has a predetermined length,
A fixing part coupled to the rotor is formed on one side of the rotating shaft, a coupling portion coupled to the sensor assembly is formed on the other side of the rotating shaft, and a screw groove is formed on the outer peripheral surface of the middle portion between one side and the other side of the rotating shaft. Supply device. According to clause 8,
The coupling part,
A pressing portion inserted into the sensor assembly;
a support portion that protrudes in a radial direction from an end of the pressing portion and is provided to have a flat section along an outer circumferential surface; and
A hydraulic pressure supply device comprising: a stepped portion formed between an end of the support portion and the middle portion to be stepped in an inward direction from the support portion. According to paragraph 1,
The rotation prevention part,
a sleeve provided between the rotor and the ball nut and having at least one slot along the moving direction of the piston; and
A ring member coupled to the ball nut and provided with a restraining protrusion inserted into the slot,
The restraining protrusion is a hydraulic pressure supply device that restrains the rotation of the ball nut while moving along the slot when the piston operates. According to clause 10,
The sleeve is a hydraulic pressure supply device fixed to the motor housing surrounding the motor or the modulator block. According to paragraph 2,
A pump housing coupled to the modulator block on the opposite side of the motor and forming a cylinder so that a piston penetrating the modulator block moves in a straight line. According to clause 12,
A hydraulic pressure supply device in which a cylindrical guide portion with one side open is provided in the pump housing so that the cylinder is divided into a first space portion that accommodates the shaft and a second space portion that accommodates the piston.

Images