JP2596553Y2 - Anti-skid device actuator - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention is intended to secure directional stability when the wheels tend to skid during sudden braking of the vehicle,
In addition, the present invention relates to an actuator of an anti-skid device (ABS) for controlling a hydraulic pressure of brake fluid supplied from a master cylinder to a wheel cylinder in accordance with a skid state of a wheel for the purpose of shortening a braking distance.

[0002]

2. Description of the Related Art Conventionally, as an actuator of an anti-skid device, there is an actuator described in Japanese Utility Model Application Laid-Open No. 63-185774. The housing of this actuator
A reservoir, a plunger pump for supplying the brake fluid stored in the reservoir to the wheel cylinder, a driving device for driving the plunger pump, a pressure-increasing solenoid valve and a pressure-reducing solenoid valve for controlling a supply fluid pressure of the brake fluid; And a relay for controlling the current to these solenoid valves. In the drive device, an eccentric cam that a plunger of the plunger pump always contacts is mounted on an output shaft of a motor mounted on a housing.

[0003]

However, in the above-mentioned conventional actuator, a bearing for supporting the output shaft of the motor in the housing is not provided. For this reason, the output shaft is in a cantilever support state, and when the plunger is reciprocated by the eccentric cam, the vibration of the output shaft is generated. This vibration is generated by the motor case via the bearing that supports the output shaft near the eccentric cam. The vibration is transmitted to the yoke and vibrates a rear cover or the like that supports the output shaft via a bearing on the side opposite to the eccentric cam side of the motor case, thereby causing radiation noise. Also,
The vibration of the motor case is transmitted to the housing and causes vibration of the actuator.

Therefore, it is conceivable to provide a bearing for supporting the output shaft of the motor in the housing.

However, the motor housing hole formed in the housing for housing the output shaft and the eccentric cam is open at one end and closed at the other end, and has a conical recess at the closed end. ing. For this reason, after fitting the bearing to the closed end of the motor receiving hole, even if it is attempted to fit the output shaft to the inner ring of the bearing, the inner ring is not supported by the closed end of the motor receiving hole. Therefore, a bearing for supporting the output shaft of the motor cannot be provided in the housing.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has as its object to provide an actuator of an anti-skid device capable of reliably supporting an output shaft of a motor in a housing.

[0007]

In order to achieve the above object, an actuator for an anti-skid device according to the present invention is provided with a motor housing hole having one end opened and the other end closed in a housing. The output shaft of the motor is inserted into the receiving hole, the bearing mounted on the output shaft is fitted to the closed end of the motor receiving hole, and the motor is mounted on the housing, while the closed end of the motor receiving hole is mounted. One end of the window hole is opened substantially concentrically, and the other end of the window hole is opened on the outer surface of the housing on the side opposite to the opening side of the motor housing hole, and the opening diameter of the window hole on the motor housing hole side and larger than the outer diameter of the inner ring of the bearing, is formed smaller than the inner diameter of the outer ring
And insert the receiving jig into the window hole from the outer surface side of the housing
Then, the outer ring is fitted into the motor housing hole by the receiving jig.
With the inner ring side of the bearing
The output shaft is configured to be fitted .

[0008]

According to the above construction, at the closed end of the motor housing hole,
Since the inner surface connecting step portion between the motor receiving hole and the window hole is formed, the outer ring of the bearing fitted in the motor receiving hole is supported by the inner surface connecting step portion. For this reason, by fitting the outer ring of the bearing into the motor receiving hole and pushing it, the bearing is disposed at the closed end of the motor receiving hole.

The inner ring of the bearing can be supported by a receiving jig through the window hole based on the opening position and the diameter of the window hole at the closed end of the motor housing hole.

Therefore, when the bearing is installed in the housing, first, the bearing is fitted into the motor receiving hole from the opening end side, and the outer ring of the bearing hits the step formed on the inner surface between the motor receiving hole and the window hole. Then, the inner ring of the bearing is supported from the opposite side of the fitting direction of the output shaft by the receiving jig inserted into the window hole, and in this state, the output shaft of the motor is press-fitted into the inner ring to perform fitting. It becomes possible.

[0011]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing an essential part of an actuator of an anti-skid device, and FIG. 2 is a sectional view for explaining an assembling process of the essential part.

The housing 1 has a motor housing hole 2 open at one end and a motor housing hole 2 and a mount insulator housing hole 3 closed at the other end.
The motor housing hole 2 is formed between the motor housing hole 2 and the mount insulator housing hole 3 at both ends thereof.
It is formed almost concentrically. As a result, at the closed end of the motor housing hole 2, an inner surface continuous step portion 2 a between the motor housing hole 2 and the window hole 4 is formed.

A bearing 5 comprising an outer ring 5a, a plurality of balls 5b, and an inner ring 5c is fitted in the motor receiving hole 2, and the outer ring 5a of the bearing 5 is brought into contact with the inner surface stepped portion 2a. In contact.

The opening diameter of the window hole 4 on the side of the motor housing hole 2 is larger than the outer diameter of the inner ring 5c of the bearing 5, and the outer ring 5a
Is formed smaller than the inner diameter of

A motor 6 is provided on the outer surface 1a of the housing 1.
The motor case 7 has a bearing 8 on the front side.
However, bearings 10 are provided on the rear cover 9 mounted on the rear side, and the output shaft 11 is rotatably supported on the motor case 7 by the bearings 8 and 10. Further, the bearing 5 is provided at the end of the output shaft 11 protruding from the motor case 7.
The output shaft 11 is rotatably supported on the housing 1 by the bearing 5.

An eccentric cam 12 which is in contact with a plunger of a plunger pump (not shown) is mounted between the bearings 5 and 8 on the outer periphery of the output shaft 11.

In the above configuration, the outer ring 5a of the bearing 5 fitted in the motor housing hole 2 is supported by the inner surface continuous step 2a between the motor housing hole 2 and the window hole 4. For this reason, the outer ring 5 a of the bearing 5 is fitted into the motor receiving hole 2 and pushed, so that the bearing 5 is disposed at the closed end of the motor receiving hole 2.

The inner ring 5c of the bearing 5 can be supported by the receiving jig 13 through the window hole 4 based on the position and diameter of the window hole 4 at the closed end of the motor housing hole 2.

Therefore, the bearing 5 is installed in the housing 1 by first fitting the bearing 5 into the motor receiving hole 2 from the opening end side, and stopping the outer ring 5a of the bearing 5 against the inner surface continuous stepped portion 2a. After being pressed by a pressing jig (not shown), the inner ring 5c of the bearing 5 is supported by a receiving jig 13 inserted into the window hole 4 from the outer surface 1b side of the housing 1 from a side opposite to a fitting direction of an output shaft 11 described later. In this state, the output shaft 11 of the motor 6 can be press-fitted into the inner ring 5c.

After the bearing 5 is installed, the receiving jig 13 is removed from the window hole 4, and then a mount insulator formed of a rubber 14 and a shaft 15 is fitted into the mount insulator receiving hole 3, and The front side of the motor case 7 is fixed to the outer surface 1 a of the housing 1.

[0022]

[Effect of the invention] As described above, this invention is applied to the housing,
One end is open and the other end is closed to form a motor housing hole,
Insert the output shaft of the motor into the motor receiving hole, fit the bearing mounted on the output shaft to the closed end of the motor receiving hole,
While mounting the motor in the housing, one end of the window hole is opened substantially concentrically with the closed end of the motor housing hole,
The other end of the window hole is opened on the outer surface of the housing on the side opposite to the opening side of the motor housing hole, the opening diameter of the window hole on the motor housing hole side is larger than the outer diameter of the inner ring of the bearing,
The outer surface of the housing is formed smaller than the inner diameter of the outer ring.
Insert the receiving jig into the window hole from the side, and with the receiving jig,
The inner ring side of the bearing with the outer ring fitted in the motor receiving hole is supported.
In this state, the output shaft of the motor is fitted to the inner ring.
For the formation, it can be supported from the opposite side of the output shaft fitting direction inner ring of the bearing in receiving jig inserted into the window hole. Therefore, the output shaft of the motor can be fitted to the inner ring of the bearing,
Since the output shaft can be supported on both sides of the eccentric cam by the bearing and the bearing in the motor, the vibration of the output shaft can be reliably suppressed. Further, since the window hole formed in the housing is opened to the outer surface of the housing via the mount insulator accommodation hole, a sealing component for the window hole is not required, and only the window hole is formed in the housing. Thus, thereby a significant reduction in the radiated sound and vibration actuators minimum necessary cost.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of an actuator of an anti-skid device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating an assembling step of the main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Motor accommodation hole 2a Inner surface continuous step part 4 Window hole 5 Bearing 5a Outer ring 5c Inner ring 6 Motor

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) B60T 8/34 F04B 1/04 F16C 3 / 035,3 / 18,35 / 067

Claims (1)

(57) [Scope of request for utility model registration] 1. A motor housing hole having one end opened and the other end closed is formed in a housing, a motor output shaft is inserted into the motor housing hole, and a bearing mounted on the output shaft is connected to the motor housing hole. And the motor is mounted on the housing, while one end of the window hole is opened substantially concentrically with the closed end of the motor accommodating hole, and the other end of the window hole is accommodated in the motor accommodating hole. is opened to the outer surface of the housing opposite the opening side of the hole, the aperture diameter of the motor accommodating hole side of the window opening, larger than the outer diameter of the inner ring of the bearing, is formed smaller than the inner diameter of the outer ring, the housing From the outside of the window into the window hole
Insert the outer ring into the motor receiving hole by the receiving jig.
With the inner ring side of the fitted bearing supported,
An actuator for an anti-skid device, wherein an output shaft of the motor is fitted .