JP2012101609A - Hydraulic control unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic control unit that reduces the number of part items and manhours required in installing a motor on a base body.SOLUTION: This hydraulic control unit 1 includes a base body 10 with a brake liquid passage formed therein, and a motor 20 installed on one surface 10a of the base body 10. An arm part 23 inserted into an installation hole 17 formed on the one surface 10a of the base body 10 is formed in a case 22 of the motor 20. A wide part 24 wider than a maximum diameter of the installation hole 17 is formed in the arm part 23. In inserting the arm part 23 into the installation hole 17, the wide part 24 bites in an inner peripheral surface of the installation hole 17.

Description

  The present invention relates to a hydraulic control unit.

  For example, a hydraulic pressure control unit used in a vehicle brake hydraulic pressure control device includes a base body in which a brake fluid path is formed, a motor for operating a pump that sucks brake fluid from a reservoir formed in the base body, It has.

As a conventional hydraulic pressure control unit, in addition to the configuration in which the motor is attached to the base using bolts, the cylindrical member attached to the mounting hole of the base is inserted into the cylindrical member attached to the flange portion of the motor. There is one in which a motor is fixed to a base body by press-fitting a sphere into the base and expanding the diameter and pressing a cylindrical member into a mounting hole (see, for example, Patent Document 1).
In addition, there is one in which the motor is fixed to the base by caulking the flange portion of the motor to the base (for example, see Patent Document 2).

JP 2006-161913 Japanese Patent Laid-Open No. 11-091527

When the motor is fixed to the base using parts such as bolts and spheres as in the conventional hydraulic control unit described above, there is a problem that the number of parts of the hydraulic control unit increases.
Further, in the configuration in which the flange portion is caulked to the base, there is a problem that the number of steps for caulking and fixing as a separate process increases when the motor is assembled to the base.

  Accordingly, an object of the present invention is to provide a hydraulic pressure control unit that can solve the above-described problems, reduce the number of parts, and reduce the number of steps for assembling the motor to the base.

  In order to solve the above problems, the present invention provides a hydraulic pressure control unit comprising a base body on which a liquid path is formed and a motor attached to one surface of the base body. An arm portion to be inserted into a mounting hole formed on one surface of the base is formed, and the arm portion is formed with a widened portion that is wider than the maximum diameter of the mounting hole, and the arm portion is The widened portion bites into the inner peripheral surface of the mounting hole when inserted into the mounting hole.

In this configuration, since the motor can be fixed to the base body by the arm portion formed on the motor case, the number of parts of the hydraulic control unit can be reduced.
In the configuration described above, when the arm portion is inserted into the attachment hole, the widened portion moves while being pushed into the inner peripheral surface of the attachment hole. At this time, on the one surface side of the base with respect to the widened portion, the portion of the inner peripheral surface that has been pushed in by the widened portion is restored, and the widened portion is in a state of biting into the inner peripheral surface of the mounting hole, thereby forming an arm portion retaining member Is done. Therefore, the motor can be fixed to the base body only by inserting the arm portion into the mounting hole.

  In addition, when the said wide part is formed in the arrowhead shape widened as it goes to the base end side from the front end side, it becomes easy to insert an arm part in an attachment hole. Moreover, since the widened portion bites into the inner peripheral surface of the mounting hole by forming the widened portion in an arrowhead shape, the pulling-out strength of the arm portion can be increased.

  In the hydraulic pressure control unit described above, when the widened portion is widened in a direction parallel to a tangent to a circle centering on the rotation center of the output shaft of the motor, along with the rotation of the output shaft, Since the strength of the arm portion against the stress in the rotational direction generated in the case is increased, the mounting strength of the motor can be increased.

  In the hydraulic pressure control unit described above, the arm portion includes a first extending portion that extends along one surface of the base body from the peripheral wall portion of the case via a bent portion, and the first extending portion. Forming a second extending portion extending in a protruding direction of the output shaft from the bent portion, and cranking the peripheral wall portion, the first extending portion, and the second extending portion. The widened portion may be formed in the second extending portion in a continuous shape.

  In this configuration, when the widened portion is inserted into the mounting hole, the widened portion is deformed so as to widen each bent portion between the peripheral wall portion, the first extending portion, and the second extending portion. When the force in the pulling direction is applied to the widened portion inserted into the mounting hole, the stress is absorbed by each bent portion, so that the close contact state between the motor and the base can be maintained.

In the hydraulic pressure control unit described above, it is preferable that a plurality of the arm portions are formed in the case, and the arm portions are arranged at equal intervals in a circumferential direction of a circle around the rotation center of the output shaft of the motor. .
In this configuration, the pulling force acting on the motor acts evenly distributed on each arm, so that the motor can be stabilized with respect to the base.

  When the hydraulic control unit described above is mounted on a vehicle in a state where the widening direction of the widening portion is arranged in the vertical direction, the arm portion against the vertical force acting on the hydraulic pressure control unit due to the vibration of the vehicle. The proof stress can be increased and the motor can be stabilized with respect to the base.

  In the hydraulic control unit of the present invention, the number of parts is reduced and the number of steps for assembling the motor to the base body is reduced. Therefore, productivity can be improved.

It is the side view which showed the hydraulic control unit of this embodiment. It is the front view which showed the hydraulic control unit of this embodiment. It is the perspective view which showed the arm part of this embodiment. It is the figure which looked at the attachment state of the arm part of this embodiment from the surface direction of the arm part, (a) is a sectional side view of the aspect which has inserted the arm part into the attachment hole, (b) is an attachment hole. It is a sectional side view of the state attached to. It is the figure which looked at the attachment state of the arm part of this embodiment from the side of an arm part, (a) is a sectional side view of the arm part before inserting in an attachment hole, (b) is the arm attached to the attachment hole. It is a sectional side view of a part. It is a hydraulic circuit diagram in the brake hydraulic pressure control device for a vehicle of this embodiment. It is the figure which showed the hydraulic control unit of other embodiment, and is a front view of the structure by which the three arm parts were formed. It is the figure which showed the hydraulic-pressure control unit of other embodiment, (a) is a front view of the structure by which the widening direction of two arm parts is arrange | positioned in the perpendicular direction, (b) is the widening direction of four arm parts. It is a front view of the structure arrange | positioned at a perpendicular direction.

Embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
The vehicle brake hydraulic pressure control device U of the present embodiment shown in FIG. 6 is suitably used for a bar handle type vehicle such as a motorcycle, a motor tricycle, and an all terrain vehicle (ATV).
The vehicle brake fluid pressure control device U includes brake systems K1 and K2 having brake fluid paths A and B connecting the master cylinders M1 and M2 and the wheel cylinders B1 and B2, and brake fluid acting on the wheel cylinders B1 and B2. And a control device 30 for controlling the pressure.

  In the vehicle brake fluid pressure control device U, by appropriately controlling the brake fluid pressure applied to the first wheel cylinder B1 mounted on the front wheel brake and the second wheel cylinder B2 mounted on the rear wheel brake. The antilock brake control of each wheel cylinder B1, B2 is possible.

The front wheel brake system K <b> 1 is a system from the inlet port 11 to the outlet port 12. The inlet port 11 is connected to the master cylinder M1, and the outlet port 12 is connected to the first wheel cylinder B1. A brake lever L1 is connected to the master cylinder M1.
The rear wheel brake system K2 is a system extending from the inlet port 13 to the outlet port 14. The inlet port 13 is connected to the master cylinder M2, and the outlet port 14 is connected to the second wheel cylinder B2. A brake pedal L2 is connected to the master cylinder M2.
Each brake system K1, K2 is provided with an inlet valve 2, an outlet valve 3, a reservoir 5, and a plunger pump 4, respectively.

The plunger pump 4 is driven by the rotational force of the motor 20, sucks the brake fluid stored in the reservoir 5, and discharges it to the master cylinders M1 and M2 side of the brake fluid paths A and B.
The motor 20 is a common power source for the plunger pumps 4, 4 of the brake systems K 1, K 2, and is an electric part whose output shaft operates based on a command from the control device 30.
The control device 30 controls the operation of the inlet valve 2, the outlet valve 3 and the motor 20 based on outputs from the wheel speed sensor for the front wheels and the wheel speed sensor for the rear wheels, so that the brake fluid paths A and B are controlled. The brake fluid pressure in the inside is varied.

  As shown in FIG. 1, a hydraulic pressure control unit 1 used in a vehicle brake hydraulic pressure control device U includes a base body 10 on which a brake fluid path is formed, a front surface 10a of the base body 10 ("one side" in the claims). ) And a control device 30 fixed to the rear surface 10b of the base body 10 are mainly provided.

The base body 10 is a steel metal part formed in a substantially rectangular parallelepiped, and brake fluid paths A and B (see FIG. 6) are formed inside.
A bottomed bearing hole 15 into which the output shaft 21 of the motor 20 is inserted is opened in the central portion of the front surface 10a of the base 10.
Although not shown, an inlet port is opened on the front surface 10a, and an outlet port is opened on the upper surface 10c. The rear surface 10b is provided with mounting holes and reservoir holes for the inlet valve and the outlet valve. Furthermore, the left and right side surfaces 10d are formed with cylinder holes 16 in which the components of the plunger pump are mounted.
And each hole provided in the base | substrate 10 is mutually connected via the brake fluid path formed in the base | substrate 10 inside.

As shown in FIG. 2, two mounting holes 17 and 17 for mounting the motor 20 are formed in the front surface 10 a.
The mounting hole 17 is a bottomed circular section hole into which an arm part 23 of the motor 20 to be described later is inserted. The two mounting holes 17 and 17 are formed at equal intervals (180 degree intervals) in the circumferential direction of the circle S with the center position P1 of the bearing hole 15 as the center.
In the present embodiment, the two mounting holes 17 and 17 are respectively formed on the upper left and lower right in FIG. 2 with respect to the center position P1, and the two mounting holes 17 and 17 are disposed obliquely with respect to the horizontal. In addition to the configuration in which the lateral width of the base body 10 is not increased more than necessary, the pump shaft (see FIG. 6) of the plunger pump 4 (see FIG. 6) in which the two mounting holes 17 and 17 are horizontally disposed inside the base body 10. The position is not limited, and is set corresponding to the position of the brake fluid passage and each hole in the base body 10.

As shown in FIG. 1, the motor 20 includes a core, a winding, a brush, and the like, although not shown, in addition to the output shaft 21 protruding from the base portion 22 a of the bottomed cylindrical case 22.
The output shaft 21 is a shaft member having a circular cross section, and a tip portion thereof is inserted into the bearing hole 15. Further, an eccentric cam 21 a is attached to the distal end portion of the output shaft 21. When the output shaft 21 rotates about the axis, the eccentric cam 21a rotates about the axis center of the output shaft 21, and the plunger of the plunger pump 4 (see FIG. 6) is axially moved by the outer peripheral surface (cam surface) of the eccentric cam 21a. It is configured to be pushed by.
As shown in FIG. 2, the rotation center P2 of the output shaft 21 and the center position P1 of the bearing hole 15 are disposed at the same position.

A flange portion 22c is formed on the outer peripheral edge portion of the base end portion of the peripheral wall portion 22b of the case 22 so as to protrude outward in a direction perpendicular to the peripheral wall portion 22b (see FIG. 1). Further, two arm portions 23, 23 inserted into the mounting holes 17, 17 of the base body 10 are formed on the outer peripheral edge portion of the base end portion of the peripheral wall portion 22 b.
The two arm portions 23 and 23 are formed at positions corresponding to the mounting holes 17 and 17 of the base body 10. That is, the arm portions 23 are formed at equal intervals (180 degree intervals) in the circumferential direction of the circle S centering on the rotation center P2 of the output shaft 21.

As shown in FIG. 3, the arm portion 23 extends from the peripheral wall portion 22 b of the case 22 to the outside of the case 22 along the front surface 10 a of the base body 10 through the bent portion 23 c. And a second extension portion 23b extending from the tip end portion of the first extension portion 23a via the bent portion 23d in the projecting direction of the output shaft 21 (see FIG. 1). It is a part of.
As shown in FIG. 5A, the peripheral wall portion 22b and the first extension portion 23a, and the first extension portion 23a and the second extension portion 23b are bent at substantially right angles, and the peripheral wall portion 22b. The side cross section of the continuous part of the first extension part 23a and the second extension part 23b is formed in a crank shape (S-shape).
The bent portion 23c between the peripheral wall portion 22b and the first extending portion 23a and the bent portion 23d between the first extending portion 23a and the second extending portion 23b are gently curved.

The second extending portion 23b is a portion that is inserted into the maximum diameter portion of the mounting hole 17, and as shown in FIG. An arrowhead-shaped widened portion 24 that is widened from the side toward the base end side is formed. The maximum width of the widened portion 24 is formed to be slightly larger than the maximum diameter of the mounting hole 17, and the width on the tip side of the widened portion 24 is formed to be smaller than the maximum diameter of the mounting hole 17 (FIG. )reference). In addition, the width of the portion on the proximal end side of the widened portion 24 in the second extending portion 23 b is formed smaller than the maximum diameter of the mounting hole 17.
As shown in FIG. 2, the widened portion 24 is widened in a direction parallel to the tangent to the circle S centered on the rotation center P <b> 2 of the output shaft 21.

As shown in FIG. 4A, when the arm portion 23 is inserted into the attachment hole 17, the arm portion 23 is attached to the attachment hole while the both side portions 24 a and 24 a of the widened portion 24 are pushed into the inner peripheral surface of the attachment hole 17. 17 moves to the bottom side.
At this time, as shown in FIG. 4B, the portion of the inner peripheral surface pushed by the widened portion 24 is restored on the front surface 10 a side (opening side) of the widened portion 24 in the mounting hole 17. That is, due to the spring back generated in the mounting hole 17, the widened portion 24 is bitten into the inner peripheral surface of the mounting hole 17, and the retaining portion 17 a of the arm portion 23 is formed closer to the front surface 10 a than the widened portion 24. .
As described above, in the present embodiment, the maximum width of the widened portion 24 with respect to the inner diameter of the mounting hole 17 is set so that springback occurs on the front surface 10a side of the widened portion 24.

  In the arm portion 23 of the present embodiment, as shown in FIGS. 5A and 5B, when the widened portion 24 is inserted into the mounting hole 17, the peripheral wall portion 22b, the first extending portion 23a, The widened portion 24 is configured to be pushed into the mounting hole 17 while being deformed so as to widen the bent portions 23c and 23d between the second extending portions 23b.

In the hydraulic pressure control unit 1 as described above, the motor 20 can be fixed to the base body 10 by the arm portion 23 formed on the case 22 of the motor 20 as shown in FIG. The number of parts can be reduced.
Also, as shown in FIG. 4B, the retaining portion 17 a of the widened portion 24 is formed by inserting the arm portion 23 into the mounting hole 17, so that the arm portion 23 is inserted into the mounting hole 17. Only by this, the motor 20 can be fixed to the base 10.
Thus, in the hydraulic pressure control unit 1 of the present embodiment, the number of parts is reduced, and the man-hour when the motor 20 is assembled to the base body 10 is reduced, so that productivity can be improved.

  In addition, the arm portion 23 can be easily inserted into the mounting hole 17 by forming the widened portion 24 into an arrowhead shape that is widened from the distal end side toward the proximal end side. In addition, by forming the widened portion 24 in an arrowhead shape, the corner portion of the widened portion 24 surely bites into the inner peripheral surface of the mounting hole 17, so that the pulling strength of the arm portion 23 can be increased.

  Further, as shown in FIG. 2, the two arm portions 23, 23 are arranged at equal intervals in the circumferential direction of the circle S centering on the rotation center P <b> 2 of the output shaft 21, so that the pulling force acting on the motor 20 can be reduced. The motor 20 can be stabilized with respect to the base body 10 because the arm portions 23 and 23 are distributed evenly.

  Further, by widening the widened portion 24 in a direction parallel to the tangent to the circle S, the strength of the arm portion 23 against the stress in the rotational direction generated in the case 22 as the output shaft 21 rotates is increased. The mounting strength of the motor 20 can be increased.

  5A and 5B, when the widened portion 24 is inserted into the mounting hole 17, the peripheral wall portion 22b, the first extending portion 23a, and the second extending portion of the case 22 are used. Even when a force in the pulling direction acts on the widened portion 24 inserted into the mounting hole 17 by pushing the widened portion 24 into the mounting hole 17 while deforming the bent portions 23c and 23d between 23b. Since the stress is absorbed by each of the bent portions 23c and 23d, the motor 20 can be prevented from floating with respect to the front surface 10a of the base body 10, and the close contact state between the motor 20 and the base body 10 can be maintained.

The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
For example, in this embodiment, as shown in FIG. 2, the motor 20 is fixed to the base body 10 by two arms 23, 23, but as shown in FIG. 7, the rotation center P2 of the output shaft 21 is the center. Three arm portions 23 arranged at equal intervals (60-degree intervals) in the circumferential direction of the circle may be used, and three or more arm portions 23 may be used. In addition, although it is preferable that the space | interval of the some arm part 23 is equal intervals, it is not specifically limited.
Further, the arrangement of the plurality of arm portions 23 is not limited, and as shown in FIG. 7, the widened portions 24 of the two arm portions 23 of the three arm portions 23 are arranged on the circumference of the circle S1. The widened portion 24 of the other one arm portion 23 may be disposed on the circumference of the circle S2.

Further, as shown in FIG. 8A, when the hydraulic control unit is mounted on the vehicle, when the widening portions 24, 24 on the left and right sides are set to be arranged in the vertical direction, The proof strength of the arm portion 23 against the vertical force acting on the hydraulic pressure control unit due to the vibration of the vehicle can be increased, and the motor 20 can be stabilized with respect to the base 10.
Further, as shown in FIG. 8B, a pair of upper and lower arms 23, 23 in which the widening direction of the widened portion 24 is arranged in the vertical direction are arranged on the left and right sides of the case 22. When the motor 20 is fixed to the base body 10, the motor 20 can be made more stable with respect to the base body 10.

1 Hydraulic Control Unit 10 Base 10a Front (One side)
15 bearing hole 17 mounting hole 17a retaining portion 20 motor 21 output shaft 22 case 22b peripheral wall portion 22c flange portion 23 arm portion 23a first extending portion 23b second extending portion 23c bent portion 23d bent portion 24 widened portion 30 Control device U Vehicle brake fluid pressure control device

Claims (6)

A hydraulic pressure control unit comprising a base body on which a liquid path is formed, and a motor attached to one surface of the base body,
The motor case is formed with an arm portion that is inserted into a mounting hole formed on one surface of the base body,
The arm portion is formed with a widened portion that is wider than the maximum diameter of the mounting hole,
The hydraulic control unit according to claim 1, wherein the widened portion bites into an inner peripheral surface of the mounting hole when the arm portion is inserted into the mounting hole.   2. The hydraulic control unit according to claim 1, wherein the widened portion has an arrowhead shape widened from the distal end side toward the proximal end side.   3. The hydraulic control according to claim 1, wherein the widened portion is widened in a direction parallel to a tangent to a circle centering on a rotation center of the output shaft of the motor. unit. The arm portion includes a first extending portion extending along one surface of the base body from the peripheral wall portion of the case via a bent portion, and the first extending portion extending from the first extended portion via the bent portion. A second extending portion that extends in the protruding direction of the output shaft, and the peripheral wall portion, the first extending portion, and the second extending portion are continuous in a crank shape,
The hydraulic control unit according to any one of claims 1 to 3, wherein the widened portion is formed in the second extending portion. The case is formed with a plurality of arms.
The said each arm part is arrange | positioned at equal intervals in the circumferential direction of the circle | round | yen centering on the rotation center of the output shaft of the said motor, The Claim 1 characterized by the above-mentioned. Hydraulic control unit.   The hydraulic control unit according to any one of claims 1 to 5, wherein the hydraulic control unit is mounted on a vehicle in a state where a widening direction of the widening portion is arranged in a vertical direction.

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