JPH07237533A - Actuator for antiskid device - Google Patents

Abstract

PURPOSE:To provide an actuator for an antiskid device to improve the working ability of soldering and the assembly ability of a solenoid valve cover or the like. CONSTITUTION:An actuator for an antiskid device is composed in such a formation as a solenoid valve unit 3 is arranged in a housing having a pump unit 1; a solenoid valve cover 16 to cover the solenoid valve unit 3 is attached to the housing 5 for forming a solenoid valve accommodating chamber 15; and the solenoid valve cover 16 is formed of a nonbottomed cylindrical inner cover 16. and a bottomed cylindrical outer cover 162 having a cylindrical part 162a where the cylindrical part 161a of the inner cover 16. is fitted. U-shaped notches 28, 29 having severally an opening end are overlapped on both the cylindrical parts 161a, 162a of the outer and the inner cover 162, 161 to form a through hole, and an another grommet 13 is insertedly attached to the through hole, and the one end of a lead wire 12 whose other end is attached to the rigid substrate 11 of the solenoid valve unit 3 is inserted through a lead wire inserting through hole 13a provided in the grommet 13, and connected to a relay unit 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention aims at ensuring directional stability and shortening the braking distance when the wheels tend to skid during sudden braking of the vehicle, depending on the skid state of the wheels. The present invention relates to an actuator of an anti-skid device that controls the hydraulic pressure of brake fluid supplied from a master cylinder to a wheel cylinder.

[0002]

2. Description of the Related Art An actuator of such an anti-skid device includes a pump unit including a pump for supplying a brake fluid stored in a reservoir tank to a wheel cylinder, a motor unit including a motor for driving the pump, and the like. An electromagnetic valve unit including an electromagnetic valve that controls the hydraulic pressure of the brake fluid, and a relay unit including a relay that controls the current to the electromagnetic valve are included.

A conventional actuator of this type is disclosed in, for example, Japanese Unexamined Patent Publication No. 63-180550. According to this, as shown in FIG. 10, a side wall of a housing 31 containing a pump unit is provided. An electromagnetic valve unit 32 is arranged, and an electromagnetic valve cover 33 that covers the electromagnetic valve unit 32 is fixed to the housing 31. A plug 34 is formed integrally with the solenoid valve cover 33 in order to reduce the manufacturing cost and the assembly cost of the solenoid valve cover 33 and to enhance the liquid tightness with the housing. The connection needle 35 is embedded, and the flexible board 36 of the solenoid valve unit 32 is connected to the connection needle 35.

Then, the terminals 37 of the solenoid valve unit 32 mounted on the housing are connected by soldering one end of the flexible substrate 36, and the other end of the flexible substrate 36 is integrally embedded in the solenoid valve cover 33. The contact needle 35 is connected by being soldered.

[0005]

Therefore, soldering of the connecting needle 35 of the flexible substrate 36 and the terminal 37 of the solenoid valve unit 32 is performed by inclining the solenoid valve cover 33, and the solenoid valve cover 33 is positioned. In this state, the connecting needle 35 is soldered, then the terminals 37 of the solenoid valve unit 32 are soldered, and finally the solenoid valve cover 33.
Will be fixed to the housing 31. Therefore, the soldering work is difficult to perform and the assembling work of the actuator is complicated.

Therefore, an object of the present invention is to provide an actuator for an anti-skid device which improves the workability of soldering and improves the assembling property of the actuator.

[0007]

In order to achieve this object, the present invention is, firstly, to provide a solenoid valve unit for disposing a solenoid valve unit in a housing containing a pump unit and covering the solenoid valve unit. Is attached to the housing to form a solenoid valve accommodating chamber, and the solenoid valve cover has a bottomed tubular outer cover having a bottomless tubular inner cover and a tubular portion into which the tubular portion of the inner cover is fitted. And a U-shaped notch formed by opening at each end of the outer cover and the inner cover, forming a through hole by the notch. Insert a grommet into the grommet, insert the lead wire into the lead wire insertion hole provided in the grommet, attach one end of the lead wire to the substrate of the solenoid valve unit, and connect the other end of the lead wire to the relay unit. Let me configure.

Secondly, the solenoid valve cover is composed of a single unit, and a U-shaped slit is provided at the end thereof, and a separate plug having a U-shaped outer periphery is provided in the slit. When the plug is inserted, the end of the plug is made substantially continuous with the end of the cover, and the lead wire attached to the substrate of the solenoid valve unit is inserted into the lead wire insertion hole provided in the plug. It is configured by connecting to a relay unit.

[0009]

According to the present invention, in the first case, the other end of the lead wire whose one end is connected to the solenoid valve unit is inserted into the lead wire insertion hole of the grommet and then attached to the connector, and then the groove portion of the grommet. After holding the grommet on the end of the U-shaped notch of the inner cover and inserting the grommet, while fitting the tubular part of the outer cover to the tubular part of the inner cover, align the groove of the grommet with the U of the outer cover. Hold the grommet at the end of the notch and insert the grommet, and finally attach the upper and lower covers together to the housing.

In the second case, the other end of the lead wire whose one end is connected to the solenoid valve unit is inserted into the lead wire insertion hole of the grommet and then attached to the connector, and then the groove portion of the grommet is attached to the solenoid valve cover. After inserting it through the opening of the U-shaped notch and holding it by the end, and inserting the grommet into this solenoid valve cover, finally attach the solenoid valve cover to the housing.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is an exploded perspective view of an actuator of an anti-skid device showing a first embodiment of the present invention, FIG. 2 is a side view showing the grommet of FIG. 1, and FIG. 3 is a diagram showing the inner and outer covers and the grommet of FIG. 4 is a front sectional view for explaining a state before the assembling, FIG. 4 is a side view of the same, and FIG. 5 is a lateral sectional view showing a part of the actuator of the antiskid device of FIG. 1 showing a case where the solenoid valve cover is assembled to the housing. And
The actuator includes a pump unit 1 including a pump that supplies the brake fluid stored in the reservoir tank to a wheel cylinder (not shown), a motor unit 2 including a motor that drives the pump of the pump unit 1, and a brake fluid. Solenoid valves 6 for controlling the hydraulic pressure of
And a relay unit 4 including a relay for controlling a current to the solenoid valve 6 and the like.

The pump unit 1 is built in the housing 5, and an electromagnetic valve unit 3 is arranged on one of the opposite side walls 5a and 5b of the housing 5. Solenoid valve 6 of solenoid valve unit 3
Is fixed to the housing 5 by a pressing plate 8 that is inserted into a valve hole 7 provided in the housing 5, and a bolt 9 is screwed into a screw hole 10 and attached to the housing 5.

The rigid substrate 11 has a terminal 6 for the solenoid valve 6.
While a is soldered, one end of the lead wire 12 is soldered to electrically connect the lead wire 12 and the solenoid valve 6.

Reference numeral 16 denotes a solenoid valve cover formed by pressing, for example, an aluminum material. The solenoid valve cover 16 includes the solenoid valve 6, the pressing plate 8,
It covers the rigid board 11 and is fixed to the housing 5 with four bolts 21. At the time of this fixing, the seal ring 22 is interposed between the solenoid valve cover 16 and the housing 5 to form the solenoid valve housing chamber 15 for sealing the solenoid valve 6 and the like.

The electromagnetic cover 16 is composed of a bottomless cylindrical inner cover 16 ₁ and a bottomed cylindrical outer cover 16 ₂ .

[0017] the cover 16 ₁ includes a flange portion 16 1 _b formed by the one end periphery of the cylindrical portion 16 1 _a and the cylindrical portion 16 1 _a having a small tapered surface on the outer circumferential surface is protruded outward It consists of. The flange portion 16 ₁ b, the bolt 21
The insertion hole 25 is formed.

The outer cover 16 ₂ has a bottomed cylindrical portion 16 ₂ a.
To be composed of a flange portion 16 2 _b which is formed by projecting the opening end of the cylindrical portion 16 2 _a to the outside. Insertion holes 26 of the flange portion 16 in the ₂ b, also the bolt 21
Has been drilled.

Then, the cylindrical portion 16 ₂ a of the outer cover 16 ₂
The combined fit the inner cover 16 ₁ of the cylindrical portion 16 ₁ a, fitted with a metal tool, overlay and an inner cover 16 ₁ b and the flange portion 16 ₂ b of the outer cover 16 _2, both the insertion hole 25 , 26 into which the bolt 21 is inserted.
Is screwed into the screw hole 27 of the housing 31, and the electromagnetic cover 16 is attached to the housing 31.

Furthermore, the other end portion of the inner cover 16 ₁ of the cylindrical portion 16 ₁ a, one end of U-shaped notch 28 opening is formed, also the outer cover 16 _{and second} tubular portion 16 ₂ a opening the end side is formed with notches 29 of the U-shaped end opening through the flange portion 16 2 _b, the notch 28, 29
Form a through hole 17 into which the grommet 13 is inserted by fitting the tubular portions 16 ₁ a and 16 ₂ a together.

As shown in FIG. 2, the grommet 13 is made of an elastic material such as rubber and has a lead wire insertion hole 13 therein.
a is formed, the insertion base portion 18 is inserted into the through hole 17 of the electromagnetic valve cover 16, and the tie band (extended to the outside of the electromagnetic valve cover 16 is continuous with the insertion base portion 18). It has a small-diameter binding portion 19 which is bound by a drawing or the like, and a tube portion 20 which is formed at the tip of the binding portion 19 and protects the lead wire 12.

Therefore, the other end of the lead wire 12 penetrates through the lead wire insertion hole 13a of the grommet 13,
The other end of the penetrating lead wire 12 is electrically connected to the relay unit 4 via a connector (not shown).

The insertion base portion 18 is composed of insertion pieces 18a and 18b which are alternately arranged and have a U-shaped outer shape, and the insertion base portions 18 are formed in the through holes 17 of the insertion pieces 18a and 18b. When both are attached to the respective tubular portions 16
₁ a, 16 ₂ embraces the end portion of the notch 28, 29 of a slit 30a, 30b is formed.

Therefore, the through hole 17 has the slits 30a, 3a.
0b and lead wire insertion hole 13
The a is sealed by binding the binding portion 19 with a tie band or the like.

According to the embodiment of the present invention configured as described above, the other end of the lead wire 12 whose one end is bent in advance is inserted into the lead wire insertion hole 13a of the grommet 13 and connected to the connector. Further, the binding portion 19 of the grommet 13 is bound with a tie band or the like.

Then, the solenoid valve 6 of the solenoid valve unit 3, the pressing plate 8, the lead wire 12, the grommet 13, and the connector 1
4, the rigid board 11 is assembled, the solenoid valve 6 terminal 6a
Is soldered to the rigid substrate 11, and the rigid substrate 11 is in a sub-assembled state by soldering and fixing the bent one end of the lead wire 12 so that the solenoid valve is opened in the valve hole 7 The grommet 13 connected to the lead wire 12, and then the solenoid valve cover 1
6 is inserted into the through hole 17 of the inner cover 16 _1. At this time, first, the notch 2 of the inner cover 161 is changed from the state shown in FIGS.
8 opening side, and inserting the mounting base 18 of the grommet 13, the slit 30a of the inserting piece 18a, thereby holding and inserted into the ends of the notches 28, then, the inner cover 16 ₁ of the cylinder Shape 1
6 by inserting the cylindrical portion 16 ₂ a of the outer cover 16 ₂ to ₁ a,
The slit 30b of the inserting piece 18b of the grommet 13, is holding the end of the notch 29, flange portions 16 ₁ b and 16
Overlapping the ₂ b. Then, flange portions ₁₆ 1 b,
The solenoid valve cover 16 formed by the inner and outer covers 16 ₁ and 16 ₂ is attached to the housing 5 by inserting the bolt 21 into the insertion holes 25 and 26 provided in the 16 ₂ b and screwing the bolt 21 into the screw hole 27. Yes (state shown in FIG. 5).

Therefore, according to the above embodiment, the solenoid valve cover 16 is composed of the bottomless cylindrical inner cover 16 ₁ and the bottomed cylindrical outer cover 16 _2, and these inner and outer covers 16 ₁ ,
16 ₂ U-shaped notches 28, 29 allow for grommet 13
To form the through hole 17 for inserting the lead wire 12
Is inserted into the lead wire insertion hole 13a of the grommet 13 to connect the connector, and the lead wire 12 is connected to the rigid board 1
After soldering to No. 1, through hole 17 of solenoid valve cover 16
Then, the grommet 13 can be inserted and finally the solenoid valve cover 16 can be attached to the housing 5. Therefore, the soldering work of the lead wire 12 to the rigid board 11 and the terminal 6a of the solenoid valve 6 to the rigid board 11 are performed.
The soldering work can be performed without being hindered by the solenoid valve cover 16, and the workability can be improved. When the solenoid valve cover 16 is attached to the housing 15, the connector and the grommet 13 have already been attached.
Both ends of the lead wire 12 to which the
1 and the solenoid valve cover 16 have already been fixed, the mountability of the solenoid valve cover 16 to the housing 5 is also improved.

FIG. 6 shows a plan view of a second embodiment of the present invention. In this embodiment, both cylindrical portions 16 of an inner cover 16 ₁ and an outer cover 16 ₂ constituting the solenoid valve cover 16 are shown.
_A gap 23 is formed between ₁ b and 16 ₂ b in a slit shape, and the gap 23 allows the solenoid valve cover and the housing 5
Is designed to fulfill the breather function of the solenoid valve accommodating chamber 14. The clearance 23 is one or more formed in the lower portion in a state of superimposed inner circumferential surface of the outer peripheral surface of the inner cover 16 ₁ and the outer cover 16 _2, the inner cover 16 _first flange portion 16 1 _b and the outer cover 16 ₂ flange portion 16
It extends to both the flange surface of the _{2 b.}

FIGS. 7 to 9 show a third embodiment of the present invention, in which the solenoid valve cover 16 is constituted by a single cover body. There is formed a notch 30 ₁ U-shaped opening in the housing 5 side, to constitute a through hole 17 for inserting the grommet 13. Then, the outer peripheral portion of the grommet 13, the slits 30 ₂ is formed, so as to embrace the end of the notch 30 _1. Further, when inserting the grommet 13 into the notch 30 _1, the ends of the grommet 13 is continuous to the end portion and the generally planar solenoid valve cover 16. Further, by constructing the solenoid valve cover 16 with a single cover, the mounting work to the housing 5 is further simplified.

[0031]

As described above, according to the present invention, firstly, the solenoid valve cover is composed of a bottomless cylindrical inner cover and a bottomed cylindrical outer cover, and these inner and outer covers are U-shaped. The notch forms a through hole into which the grommet is inserted, and secondly, the solenoid valve cover is configured with a bottomed cylindrical single-piece cover body,
Since a U-shaped slit that opens at the end of this solenoid valve cover is provided to form a through hole for inserting the grommet, the lead wire is inserted into the lead wire insertion hole of the grommet,
After connecting the connector and soldering the lead wire to the board, it is possible to insert the grommet into the through hole of the solenoid valve cover and finally attach the solenoid valve cover to the housing. The soldering work and the soldering work to the terminals of the solenoid valve to the substrate can be performed without being disturbed by the solenoid valve cover, and these workability can be improved. Also, when mounting the solenoid valve cover to the housing, both ends of the lead wire already assembled with the connector and grommet are already fixed by the board and solenoid valve cover, so the housing of the solenoid valve cover is It will also improve the assembling property.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an actuator of an anti-skid device showing a first embodiment of the present invention.

FIG. 2 is a side view showing the grommet of FIG.

FIG. 3 is a front sectional view for explaining a state before the inner and outer covers of the solenoid valve cover of FIG. 1 and a grommet are assembled.

FIG. 4 is a side view illustrating a state before the inner and outer covers and the grommet of FIG. 1 are assembled.

FIG. 5 is a transverse cross-sectional view showing a part of an actuator similar to that of FIG. 1 showing a case where an electromagnetic valve cover is assembled to a housing.

FIG. 6 is a plan view showing a partial cross section of an actuator of an anti-skid device according to a second embodiment of the present invention.

FIG. 7 is an exploded perspective view of an actuator of an anti-skid device according to a third embodiment of the present invention.

FIG. 8 is a plan view showing an actuator of an anti-skid device according to a third embodiment of the present invention, similar to FIG. 7, with a cross section of a solenoid valve cover.

FIG. 9 is a vertical cross-sectional view showing the main part of the actuator of the anti-skid device according to the third embodiment of the present invention, which is similar to FIG.

FIG. 10 is a front view in which a part of an actuator of an anti-skid device showing a conventional technique is sectioned.

[Explanation of symbols]

1 pump unit 3 solenoid valve unit 4 relay unit 5 housing 6 solenoid valve 11 rigid board (board) 12 lead wire 13 grommet 13a lead wire insertion hole 15 solenoid valve accommodating chamber 16 solenoid valve cover 16 ₁ inner cover 16 ₁ a cylindrical part 16 ₂ Outer cover 16 ₂ a Cylindrical part 17 Through hole 23 Gap (breather part) 30 ₁ Slit 28, 29 Notch

Claims (3)

[Claims] 1. A solenoid valve unit is arranged in a housing containing a pump unit, and a solenoid valve cover for covering the solenoid valve unit is attached to the housing to form a solenoid valve accommodating chamber. A bottomed tubular inner cover and a bottomed tubular outer cover having a tubular portion into which the tubular portion of the inner cover fits, and the tubular portions of the outer cover and the inner cover respectively. A U-shaped notch formed by opening at the end is polymerized to form a through hole by the both notches, a grommet is inserted into the through hole, and a lead wire is inserted into a lead wire insertion hole provided in the grommet. Is inserted, one end of the lead wire is attached to the substrate of the solenoid valve unit,
An actuator for an anti-skid device, wherein the other end of the lead wire is connected to a relay unit. 2. An actuator for an anti-skid device according to claim 1, wherein a breather portion in the electromagnetic valve accommodating chamber is formed between the two cylindrical portions fitted to each other. 3. A solenoid valve unit is arranged in a housing containing a pump unit, and a bottomed solenoid valve cover for covering the solenoid valve unit is attached to the housing to form a solenoid valve accommodating chamber, The valve cover is provided with a U-shaped slit having an opening at its end, and a grommet having a U-shaped outer periphery is inserted into the slit so that the end of the grommet is substantially planar with the end of the cover. At the same time, the lead wire is inserted through the lead wire insertion hole provided in the grommet, one end of the lead wire is attached to the substrate of the solenoid valve unit, and the other end of the lead wire is connected to the relay unit. The actuator of the characteristic anti-skid device.