JP2599039Y2 - solenoid - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solenoid used for, for example, a valve of a fuel injection system of an internal combustion engine.

[0002]

2. Description of the Related Art FIG. 3 shows an example of a conventional solenoid of this type. That is, the solenoid 100 is used for a valve or the like of a fuel injection system of an internal combustion engine. The solenoid 100 has a solenoid body 101 , and the solenoid body 101
And two connectors 102, 102 for supplying electricity to the protruding portion are provided at a predetermined radial distance from the solenoid body 101. And, this solenoid body 10
1 is held by a retainer 104 as a holding member.
The retainer 104 has mounting holes 107, 107 in which the insulating spacers 103, 103 through which the connectors 102, 102 are inserted are mounted. Also base 1
A seal 03 seals hydraulic oil from the end face side of the solenoid main body 101 when the solenoid main body 101 is held by the retainer 104.
07 is fitted in a fluid-tight manner via an O-ring B105 as a seal member mounted on the outer peripheral surface.

[0003] The solenoid 100 is attached to an injection device body (not shown) as a mating attachment member. The attachment is performed by attaching spacers 103, 103 to attachment holes 107, 107 of a retainer 104 and an O-ring 1.
05, 105, and the spacers 103, 1
03, O-rings A106, 106 as sealing members
After the connectors 102, 102 are inserted and assembled via the connector, a screw portion 108 provided as a retainer 104 as a fixing portion for rotating and fixing with the injection device main body, for example, a screw portion 109 of the injection device main body is connected to a solenoid. Body 101
Of the retainer 104 is engaged with the retainer 104.
By screwing until it comes into contact with the end face of the step portion 104A.

[0004]

However, the frictional force generated when the end surface of the screw portion 109 of the injection device body comes into contact with the end surface of the engaging portion 101A at the time of mounting, causes the solenoid main body 10 to move.
1 and the retainer 104 are displaced in the rotation direction. Due to this displacement, a load in the shear direction is applied to the connector 102, which may lead to worst-case damage.
02 had to be strengthened, and the material was expensive.

The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a solenoid capable of reducing the load on a connector.

[0006]

In order to achieve the above object, according to the present invention, a solenoid body having a plurality of connectors for supplying electricity, and a mating mounting member holding the solenoid body are provided. A solenoid having a holding member having a fixing portion for rotating and fixing, and a spacer into which the connector is inserted and which is fitted into a mounting hole provided in the holding member, wherein the spacer is formed by one member. A mounting hole provided in the holding member is provided coaxially with the solenoid body.

[0007]

In the solenoid having the above structure, a spacer through which a plurality of connectors are inserted is formed by a single member.
Since the mounting hole of the spacer provided in the holding member holding the solenoid body is provided coaxially with the solenoid body, even when the holding member is displaced in the rotational direction when attached to the mating mounting member, Since there is no displacement between the spacer and the solenoid body, no load is applied to the connector in the shearing direction.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiment. In FIG. 1 showing a solenoid according to one embodiment of the present invention, reference numeral 1 denotes a solenoid used for a valve or the like of a fuel injection system of an internal combustion engine, and the solenoid 1 has a plurality of solenoids (this embodiment) for supplying electricity. A solenoid body 2 having two connectors 3 and 3 in the example, and a screw portion as a fixing portion for holding the solenoid body 2 and rotating and fixing the same to an injection device body (not shown) as a mating attachment member. 5
1 and a spacer 4 made of an insulating material into which the connectors 3 and 3 are inserted and which is fitted into a mounting hole 52 provided in the retainer 5.

The solenoid body 2 has a cylindrical shape, and has two connectors 3 protruding from one end thereof at a predetermined interval in a radial direction, and is provided on the opposite side with a step 53 provided in the retainer 5. A large diameter engaging portion 21 is provided.

The retainer 5 has a substantially cylindrical shape having a hollow portion for holding the solenoid body 2, and has a mounting hole 52 at one end for fitting the spacer 4. This mounting hole 52
Is formed coaxially with the solenoid body 2 when the solenoid body 2 is held by the retainer 5. On the other hand, a screw portion 51 for rotating and fixing a screw portion (not shown) of the injection device main body is provided at an opposite end portion of the mounting hole 52, and the solenoid main body 2 is provided axially inside thereof. It has a step 53 with which the engaging portion 21 is engaged.

The spacer 5 is formed of one member,
It has a columnar shape with insertion holes 41, 41 through which the connectors 3, 3 are properly inserted. And this spacer 5
Is an O-ring as a sealing member mounted on the outer peripheral surface of the mounting hole 52 of the retainer 5 when the solenoid main body 2 is held by the retainer 5 to seal hydraulic oil from the end face side of the solenoid main body 2. It is fitted in a fluid-tight manner via B6.

The solenoid 1 is attached to, for example, an injection device main body.
The spacer 4 is fitted into the mounting hole 52 of the retainer 5 via the O-ring B6 until the spacer 4 comes into contact with the end face of the radially inwardly facing inward flange portion 54 provided at the opening end of the mounting hole 52. After inserting the connectors 3 and 3 into the insertion holes 41 and 41 via O-rings A 7 and 7 as sealing members and assembling them, for example, the screw portion of the injection device main body is screwed into the screw portion 51 provided on the retainer 5. 2 by screwing until the engaging portion 21 with the retainer 5 comes into contact with the end face of the step portion 53 of the retainer 5. The rotation fixing between the mating attachment member and the retainer 5 is not limited to fixing by screwing, but may be other rotation fixing means.

In the solenoid having the above structure, the spacer 4 is formed by one member, and the mounting hole 52 of the spacer 4 is provided coaxially with the solenoid main body 2, so that the screw of the injection device main body is mounted when the solenoid is mounted. Even if the solenoid body 2 and the retainer 5 are displaced in the rotational direction due to frictional force when the end face of the portion contacts the end face of the solenoid body 2, the spacer 4 and the solenoid body 2 are not displaced. The load in the shear direction is not applied to the third and third members, and it is not necessary to increase the strength of the connector 3. Thereby, the material can be made inexpensive.

However, in the above embodiment, the upper surface of the spacer 4 in the drawing is the inward flange portion 54 of the mounting hole 52 of the retainer 5.
The contact area is small, and the working oil pressure P acting from the end face side of the solenoid body 2 has a large influence. In the case of high pressure, the material of the spacer 4 needs to be strengthened.

FIG. 2 shows a second embodiment which is an extension of the first embodiment and solves the above-mentioned problems. In this embodiment, the inward flange portion 54 is eliminated at the opening end of the mounting hole 52, and the plate 9 has the function of supporting the spacer 4. The plate 9 has a disk shape that covers the entire end surface of the retainer 5 having the holes 91 and 91 through which the connectors 3 and 3 are inserted. The hole 91 of the plate 9 is formed coaxially with the connector 3. After the solenoid is mounted on the mating mounting member, the plate 9 is tightened and fixed to the retainer 4 by the tightening means 10 in four equal intervals.

In the solenoid constructed as described above, since the plate 9 is detached at the time of mounting, no load is applied to the connectors 3 and 3, and at the time of use, the hole 91 of the plate 9 is connected to the connector 3. Because of being coaxial, the load on the spacer 4 is reduced. In addition, as a result, the processing such as the contact surface φD portion of the O-ring B6 mounted on the outer peripheral surface of the spacer 4 can be performed from the upper side of the retainer 5 in the drawing, and the production can be facilitated.

Since other constructions and operations are the same as those of the first embodiment, the same components are denoted by the same reference numerals and description thereof will be omitted.

[0018]

According to the present invention, the spacer having the above-described structure and operation is formed by a single member, and a spacer provided on a holding member for holding the solenoid body is formed. Since the hole is provided coaxially with the solenoid main body, when the solenoid is mounted on the mating mounting member, no displacement occurs between the spacer and the solenoid main body even if the holding member is displaced in the rotational direction. Therefore, a load in the shear direction is not generated on the connector, and it is not necessary to increase the strength of the connector. This leads to a reduction in the material of the connector.

[Brief description of the drawings]

FIG. 1A is a top view of a solenoid according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line AA of FIG. 1A.

FIG. 2 (a) is a top view of a solenoid according to a second embodiment of the present invention, and FIG. 2 (b) is an AA of FIG. 2 (a).
It is a line sectional view.

FIG. 3A is a top view of a conventional solenoid, and FIG. 3B is a cross-sectional view taken along line AA of FIG. 3A.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Solenoid 2 Solenoid main body 21 Engagement part 3 Connector 4 Spacer 41 Insertion hole 5 Retainer (holding member) 51 Screw part (fixing part) 52 Mounting hole 53 Stepped part 54 Inward flange 6 O-ring B 7 O-ring A 9 Plate 91 Hole 10 Tightening means

Claims (1)

(57) [Scope of request for utility model registration] 1. A solenoid body having a plurality of connectors for supplying electricity, a holding member having a fixing portion for holding the solenoid body and rotating and fixing the solenoid body to a counterpart mounting member, and the connector is inserted therethrough. And a spacer fitted in a mounting hole provided in the holding member, wherein the spacer is formed by one member, and the mounting hole provided in the holding member is coaxially formed with the solenoid body. A solenoid characterized by being provided.