JPH0729811U - solenoid - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the load on the connector. A spacer 4 through which a plurality of connectors 3 and 3 are inserted is formed by one member, and a mounting hole 52 for the spacer 4 of a holding member 5 for holding the solenoid body 2 is provided coaxially with the solenoid body 2. It is characterized by that.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a solenoid used for a valve of a fuel injection system of an internal combustion engine, for example.

[0002]

[Prior art]

 A conventional solenoid of this type is, for example, one shown in FIG. That is, the solenoid 100 is used for a valve of a fuel injection system of an internal combustion engine. The solenoid 100 has a solenoid main body 102, and two connectors 102, 102 for supplying electricity to the solenoid main body 101 are provided so as to protrude from the solenoid main body 101 and have a predetermined radial interval. There is. Then, the solenoid body 101 is held by a retainer 104 as a holding member. The retainer 104 has mounting holes 107, 107 into which spacers 103, 103 made of an insulating material, into which the connectors 102, 102 are inserted, are mounted. Further, the spacer 103 seals the hydraulic oil from the end face side of the solenoid body 101 when the solenoid body 101 is held by the retainer 104, and is a seal attached to the outer peripheral surface in the mounting hole 107 of the retainer 104. It is fluid-tightly fitted via an O-ring B105 as a member.

The solenoid 100 is attached to an injector main body (not shown) as a mating attachment member. The attachment is performed by attaching spacers 103 and 103 to the attachment holes 107 and 107 of the retainer 104 and O-rings. The injection device provided in the retainer 104 after the connectors 102, 102 are fitted through the spacers 103, 103 through the O-rings A 106, 106 as seal members and fitted into the spacers 103, 103. For example, the threaded portion 109 of the injector body is engaged with the threaded portion 108 as a fixing portion for rotationally fixing the body, and the engagement portion 101A with the retainer 104 of the solenoid body 101 is brought into contact with the end surface of the stepped portion 104A of the retainer 104. It is done by screwing until it touches.

[0004]

[Problems to be solved by the device]

 However, due to the frictional force generated when the end surface of the threaded portion 109 of the injector main body comes into contact with the end surface of the solenoid main body 101 during mounting, the solenoid main body 101 and the retainer 104 are displaced in the rotational direction. Due to this displacement, a load is applied to the connector 102 in the shearing direction, which may lead to the worst damage. Therefore, it is necessary to increase the strength of the connector 102 and the material is expensive.

The present invention has been made in order 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]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has a solenoid body having a plurality of connectors for supplying electricity, and a fixing portion for holding the solenoid body and rotationally fixing the solenoid body to a mating mounting member. In a solenoid having a holding member and a spacer that is inserted into the connector and is fitted into a mounting hole provided in the holding member, the spacer is formed as a single member and is provided on the holding member. The mounting hole is provided coaxially with the solenoid body.

[0007]

[Action]

 In the solenoid having the above structure, the spacer through which the plurality of connectors are inserted is formed of a single member, and the spacer mounting hole provided in the holding member for holding the solenoid body is coaxial with the solenoid body. Since it is provided on the connector, even if the holding member is displaced in the rotation direction when it is attached to the mating mounting member, the spacer and the solenoid body do not shift, so a load in the shearing direction is generated on the connector. Disappear.

[0008]

【Example】

 The present invention will be described below based on the illustrated embodiment. In FIG. 1 showing a solenoid according to an embodiment of the present invention, reference numeral 1 denotes a solenoid used for a valve of a fuel injection system of an internal combustion engine, and the solenoid 1 is a plurality of solenoids for supplying electricity. In this embodiment, a solenoid main body 2 having two connectors 3 and 3 and a fixing portion for holding the solenoid main body 2 and rotationally fixing the solenoid main body 2 to an injector main body (not shown) as a mating attachment member. The retainer 5 has a threaded portion 51 as a holding member, and the 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 main body 2 has a columnar shape, and two connectors 3 are provided at a predetermined interval in the radial direction so as to project from one end side. On the opposite side, a step portion 53 of the retainer 5 is provided. A large-diameter engaging portion 21 that engages is provided.

The retainer 5 has a substantially cylindrical shape having a hollow portion that holds the solenoid body 2, and has a mounting hole 52 into which the spacer 4 is fitted at one end thereof. The 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, at the opposite end of the mounting hole 52, there is provided a screw portion 51 for rotationally fixing a screw portion (not shown) of the main body of the injection device, and the solenoid main body 2 is axially inward thereof. It has a step portion 53 with which the engaging portion 21 is engaged.

The spacer 5 is formed of one member, and has a columnar shape having insertion holes 41 and 41 through which the connectors 3 and 3 are properly inserted. The spacer 5 seals the hydraulic oil from the end surface side of the solenoid body 2 when the solenoid body 2 is held by the retainer 5, and is mounted on the outer peripheral surface of the mounting hole 52 of the retainer 5. It is fluid-tightly fitted through an O-ring B6 as a seal member.

The solenoid 1 is attached to, for example, the injector main body, and the attachment is performed by providing the spacer 4 in the attachment hole 52 of the retainer 5 at the opening end of the attachment hole 52 via the O-ring B6. It is fitted until it comes into contact with the end face of the inward flange portion 54 that is radially inward, and the connectors 3 and 3 are inserted into the insertion holes 41 and 41 of the spacer 4 through the O-rings A7 and 7 as seal members. After assembling, screw the threaded portion of the injector body into the threaded portion 51 provided in the retainer 5 until the engagement portion 21 with the retainer 5 of the solenoid body 2 comes into contact with the end surface of the stepped portion 53 of the retainer 5. It is done by things. The mating mounting member and the retainer 5 may be fixed by rotation instead of being fixed by screwing.

In the solenoid having the above structure, the spacer 4 is formed of one member, and the mounting hole 52 of the spacer 4 is provided coaxially with the solenoid main body 2. Even if the solenoid body 2 and the retainer 5 are displaced in the rotational direction by the frictional force generated when the end surface of the screw portion comes into contact with the end surface of the solenoid body 2, the spacer 4 and the solenoid body 2 are not displaced. The load in the shearing direction is not generated on the connectors 3 and 3, and it is not necessary to increase the strength of the connector 3. This allows the material to be inexpensive.

However, in the above-described embodiment, the area in which the upper surface of the spacer 4 in the drawing abuts on the inward flange portion 54 of the mounting hole 52 of the retainer 5 is small, and is received from the working hydraulic pressure P operating from the end surface side of the solenoid body 2. The influence is great, and the material of the spacer 4 needs to be strengthened when the pressure is high.

Therefore, FIG. 2 shows a second embodiment which develops the first embodiment and solves the above 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 a function of supporting the spacer 4. The plate 9 has a disk shape that covers the entire end surface of the retainer 5 having holes 91, 91 into which the connectors 3, 3 are inserted. The hole 91 of the plate 9 is formed coaxially with the connector 3. Then, after the solenoid is attached to the mating attachment member, the plate 9 is tightened and fixed to the retainer 4 by the tightening means 10 in four equal parts.

In the solenoid configured as described above, since the plate 9 is removed at the time of mounting, no load is applied to the connectors 3 and 3, and when used, the hole 91 of the plate 9 is connected to the connector 3. Since it is coaxial, the load on the spacer 4 is reduced. Further, as a result, the contact surface φD portion of the O-ring B6 mounted on the outer peripheral surface of the spacer 4 can be processed from the upper side of the retainer 5 in the figure, and the manufacture can be facilitated.

Since other configurations and operations are the same as those in the first embodiment, the same reference numerals are given to the same components and the description thereof will be omitted.

[0018]

[Effect of device]

 The present invention has the above-described configuration and operation, and forms a spacer through which a plurality of connectors are inserted as a single member, and a mounting hole for the spacer provided in a holding member for holding the solenoid body is provided in the solenoid body. Since it is provided coaxially with the solenoid, when the solenoid is attached to the mating attachment member, the spacer and the solenoid body will not be displaced even if the holding member is displaced in the rotational direction. Therefore, no load is applied to the connector in the shearing direction, and there is no need to increase the strength of the connector. This leads to cost reduction of the material of the connector.

[Brief description of drawings]

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

3 (a) is a top view of a conventional solenoid, and FIG. 3 (b) is a sectional view taken along line AA of FIG. 3 (a).

[Explanation 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)

[Scope of utility model registration request] 1. A solenoid main body having a plurality of connectors for supplying electricity, a holding member having a fixing portion for holding the solenoid main body and rotationally fixing the solenoid main body to a mating mounting member, and the connector is inserted. A solenoid having a spacer fitted in an attachment hole provided in the holding member together with the spacer formed in one member, and the attachment hole provided in the holding member being coaxial with the solenoid body. A solenoid characterized by being provided.