JPH0735152U - Fuel injector cap mounting structure - Google Patents

Abstract

(57) [Summary] [Purpose] The object is to provide a fuel injector cap mounting structure that can be mounted with one touch and simplifies the mounting work. [Structure] The fuel injector cap 3 has
Insertion piece 3a having a stopper claw 3b at the lower end which can be inserted into the insertion hole 2c of the flange portion 2a of the fuel tube 2 and which is locked to the lower surface of the flange portion 2a in the inserted state.
Further, an outer fitting piece 3c having a claw 3d that abuts on the outer peripheral surface of the flange portion 2a of the fuel tube 2 and has a claw 3d that is locked to the lower surface of the flange is vertically provided on the outer periphery.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to an improvement of a fuel injector cap attached to a fuel tube.

[0002]

[Prior art and its problems]

 Conventionally, as shown in FIG. 3, a fuel injector 51 for injecting fuel is mounted in a fuel tube 52 which is a fuel passage, and a fuel injector cap 53 is attached to the fuel tube 52 to prevent the fuel injector 51 from being pulled out. Conventionally, the bolt 54 is screwed from the fuel injector cap 53 side into the screw holes 55 formed in the fuel tube 52, and the bolt 54 is tightened to attach the fuel to the fuel tube 52. An injector cap 53 is attached, and its attached state is shown in a sectional view in FIG. In such a conventional mounting structure, it is necessary to tighten the bolts 54, 54, and it is necessary to secure a space for this tightening work, and the engine size is made compact to secure the space. However, there is a problem that it becomes a constraint condition for weight reduction, and it is necessary to manage the tightening torque of the bolt 54.

[0003]

[Means for Solving the Problems]

 The present invention has been made in view of the above conventional problems, and an object thereof is to provide a structure for mounting a fuel injector cap that does not require tightening work, is extremely easy to mount, and does not require a working space. The gist of the present invention is a fuel injector cap that is installed on the flange portion of the fuel tube to prevent the fuel injector mounted inside the fuel tube from coming off, and the fuel injector cap has the fuel tube. An insertion piece that has a stopper claw at its lower end that can be inserted into an insertion hole penetrating the flange portion of the above and that is locked to the lower surface of the flange portion is vertically provided, and the fuel injector cap is also provided. The outer periphery of the fuel tube can contact the outer peripheral surface of the flange of the fuel tube. In it is that the outer fitting piece having a lower end a claw to be locked to the outer peripheral lower surface of the flange portion is provided vertically in the contact state.

[0004]

[Action]

 After installing the fuel injector in the fuel tube, when installing the fuel injector cap on the flange part of the fuel tube, insert the insert piece hung vertically on the fuel injector cap into the flange of the fuel tube. When the fuel injector cap is inserted into the hole, the outer fitting piece of the fuel injector cap is brought into contact with the outer peripheral surface of the flange, and the fuel injector cap is pushed in from above, the lower end of the insertion piece inserted through the insertion hole is inserted. The stopper claw is locked to the lower surface of the flange part, and the hook claw at the lower end of the outer fitting piece is locked to the outer peripheral lower surface of the flange.In this state, the fuel injector cap is firmly attached to the fuel tube. Conventional screw tightening work Is not required, by pushing from above the fuel in Jefferies compactors cap to the fuel tube, it is attached by one touch completed.

[0005]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of the fuel injector and the fuel injector cap before they are attached to the fuel tube, and FIG. 2 is an enlarged cross-sectional view of a main portion of the fuel injector cap in a mounted state.

In the figure, a flange portion 1 a is formed in an upper portion of a fuel injector 1 for injecting fuel, and when the fuel injector 1 is mounted in a fuel tube 2 which is a fuel passage, It is possible to fit the fuel injector 1 into the fuel tube 2 by fitting the collar portion 1a into the fitting recessed portion 2b formed in the recessed shape inside the flange portion 2a formed in the diameter-expanded shape at the upper end. In this state, the fuel injector cap 3 can be attached to the flange portion 2a of the fuel tube 2 from above, and the fuel injector cap 3 is a disc that is covered on the upper surface of the flange portion 2a of the fuel tube 2. The outer fitting pieces 3c, 3 are formed in a circular shape and vertically extend downward from the outer circumference thereof. c and 3c are integrally formed, and hook claws 3d, 3d and 3d that protrude inwardly in a hook shape are integrally formed at the lower end of each outer fitting piece 3c.

Further, inside the outer fitting piece 3c, an insertion piece 3a having a stopper claw 3b projecting outward at the lower end is vertically provided. In this example, the insertion piece 3a is hung vertically in a pair. The fuel tube 2 is provided with a pair of insertion holes 2c, 2c which vertically penetrate the flange portion 2a of the fuel tube 2 so that the pair of insertion pieces 3a, 3a can be inserted. It is preformed, and after mounting the fuel injector 1, insert the insertion piece 3a of the fuel injector cap 3 into the insertion hole 2c from above, and bring the outer fitting piece 3c into contact with the outer peripheral surface of the flange portion 2a. By pushing the fuel injector cap 3 toward the fuel tube 2 side, the stopper claw 3b at the lower end of the insertion piece 3a is engaged with the lower surface of the flange portion 2a of the fuel tube 2. At the same time, the claws 3d of each outer fitting piece 3c are locked to the lower surface of the outer periphery of the flange portion 2a. In this state, the claw 3d and the stopper claw 3b prevent the fuel injector cap 3 from being pulled out of the fuel tube 2 any more, and a strong covering state can be obtained.

Therefore, in the fuel injector cap 3 of this example, the attachment can be completed by pushing the fuel tube 2 from above with one touch without using a conventional bolt, and tightening the bolt as in the conventional case. Can be omitted, the installation work time can be extremely shortened, the space for tightening is not required, and there is no restriction on the surrounding engine equipment. Furthermore, it is not necessary to manage bolt tightening torque.

[0009]

[Effect of device]

 The mounting structure of the fuel injector cap of the present invention is a fuel injector cap provided on the flange portion of the fuel tube to prevent the fuel injector mounted in the fuel tube from coming off. On the injector cap, an insertion piece is provided which can be inserted into an insertion hole penetrating the flange portion of the fuel tube and has a stopper claw at the lower end which is locked to the lower surface of the flange portion in the inserted state. At the same time, on the outer circumference of the fuel injector cap, there is an outer fitting piece having a claw at the lower end that can come into contact with the outer peripheral surface of the flange portion of the fuel tube and that is locked to the outer peripheral lower surface of the flange portion in the contact state. By being installed vertically, it is formed on the flange of the fuel tube. Insert the insert piece into the insertion hole, and bring the outer fitting piece into contact with the outer periphery of the flange part, and press from above to lock the stopper claw and hook claw to the bottom surface of the flange part and firmly fix them. It can be attached to the fuel tube with one touch by pushing it in from above, simplifying the installation work, improving the workability without the need for conventional bolt tightening work, and tightening the bolt. The space for mounting is unnecessary, and there is no restriction on engine equipment. Further, since no bolts are required, the number of parts can be reduced and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a fuel tube, a fuel injector, and a fuel injector cap.

FIG. 2 is an enlarged sectional view of an essential part of a fuel injector cap in a mounted state.

FIG. 3 is an exploded perspective view corresponding to FIG. 1, showing a structure of a conventional fuel injector cap.

FIG. 4 is a cross-sectional configuration diagram of a conventional mounting structure.

[Explanation of symbols]

 1 Fuel Injector 1a Collar 2 Fuel Tube 2a Flange 2c Insertion Hole 3 Fuel Injector Cap 3a Insertion Piece 3b Stopper Claw 3c External Fitting 3d Hook Claw

Claims (1)

[Scope of utility model registration request] 1. A fuel injector cap (3) provided on a flange portion (2a) of the fuel tube (2) in order to prevent the fuel injector (1) mounted in the fuel tube (2) from coming off, the fuel injector cap (3) comprising: An insertion piece 3a having a stopper claw 3b at the lower end which can be inserted into an insertion hole 2c penetrating the flange portion 2a of the fuel tube 2 and which is locked to the lower surface of the flange portion 2a in the inserted state is vertically provided. In addition, the lower end of the fuel injector cap 3 is provided with a hook claw 3d which can be brought into contact with the outer peripheral surface of the flange portion 2a of the fuel tube 2 and which is locked to the outer peripheral lower surface of the flange portion 2a in the contact state. The fuel injector key is characterized in that the outer fitting piece 3c provided in the Cap mounting structure.