JP2582384Y2 - Diesel engine fuel injection nozzle holder mounting structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a fuel injection nozzle holder provided on a cylinder head of a diesel engine.

[0002]

2. Description of the Related Art In order to mount a fuel injection nozzle of a diesel engine to a cylinder head, Japanese Utility Model Application Laid-Open No. 64-4797 has been proposed.
No. 8, as disclosed in Japanese Patent Application Publication No. 8-108, which presses and holds a nozzle holder accommodating a fuel injection nozzle with a nozzle clamp, and as shown in FIG. The nozzle clamp 20 presses and holds the nozzle holder 3 by tightening the bolt 4 which comes into contact with the nozzle holder 3 and penetrates through the nozzle clamp 20 and is screwed to the cylinder head.

[0003]

However, when tightening the bolt 4 to the cylinder head, the nozzle clamp 2
0 and the nozzle clamp 20 according to the gap between the nozzle holder 3
Has rotated in the direction of the arrow shown in the figure, and may interfere with components such as the valve spring 6 provided in the vicinity.

Accordingly, an object of the present invention is to provide a mounting structure of a fuel injection nozzle holder for a diesel engine, which can prevent interference with a component adjacent to the nozzle clamp when the nozzle clamp is fastened and can be easily positioned.

[0005]

According to the present invention, there is provided a nozzle holder which is provided upright on a cylinder head and accommodates a fuel injection nozzle, and a fulcrum at one end which is in contact with the cylinder head.
A nozzle clamp that presses and holds the nozzle holder,
A bolt that fastens the center of the skewing clamp to the cylinder head
And extending from the fulcrum in the direction opposite to the bolt
And the nozzle clamp, the fulcrum
Extending from the nozzle clamp,
And a projecting portion for stopping rotation in the bolt fastening direction .

[0006]

[Function] A central part of the nozzle clamp is syringed with a bolt.
When tightening to the
Even if the lamp is going to rotate, the protrusion of the nozzle clamp
Is in contact with the locking member on the cylinder head.
To prevent the nozzle clamp from turning in the bolt fastening direction.
Can prevent interference with nearby parts.
In both cases, positioning can be easily performed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS This embodiment shows an embodiment in which the present invention is applied to a fuel injection nozzle provided in a cylinder head of a diesel engine.

In FIG. 1 and FIG. 2, a nozzle holder 3 containing a fuel injection nozzle is erected at a predetermined position on a cylinder head 1, and the nozzle holder 3 is pressed by a nozzle clamp 2 fastened to the cylinder head 1. Fixed.

One end of the nozzle clamp 2 is a U-shaped portion 2b branched into a U-shape. The nozzle holder 3 is inserted into the U-shaped portion 2b with a predetermined gap, and the U-shaped portion 2b is formed.
Presses the shoulder 3a of the nozzle holder 3 downward.

A bolt 4 is penetrated substantially at the center of the nozzle clamp 2, and the cylinder head 1 of the bolt 4 is
The fulcrum 2a at the other end of the nozzle clamp 2 with the fastening to the nozzle clamp 2
Is pressed by the cylinder head 1, and the U-shaped portion 2 b at the other end presses and holds the nozzle holder 3.

The nozzle clamp 2 is rotatable in the direction in which the bolt 4 is tightened. A protruding portion 2c provided by extending the fulcrum 2a is close to the bolt 5 of the cylinder head 1 as a locking member. When the clamp 2 rotates in the bolt tightening direction, the projecting portion 2c contacts the bolt 5 to prevent excessive rotation, and this contact position is a predetermined fastening position of the nozzle clamp 2.

The operation will be described below.

When assembling the cylinder head 1, the nozzle holder 3 is erected at a predetermined position on the cylinder head 1, and the nozzle clamp 2 is arranged so that the inner periphery of the U-shaped portion 2b and the nozzle holder 3 maintain a predetermined gap. After setting, bolt 4
Is tightened in the direction of the arrow shown in the figure.
The protrusion 2c abuts on the bolt 5 due to the rotation in the tightening direction, the nozzle clamp 2 cannot rotate and holds a predetermined position, and further tightens the bolt 4 to press and hold the nozzle holder 3.

At a predetermined position of the nozzle clamp 2, a nozzle clamp 2 is attached to a nearby object such as a valve spring 6.
Does not interfere with each other, and positioning can be easily performed only by tightening the bolt 4.

FIG. 3 shows another embodiment, in which the bolt 5 in the first embodiment is not provided near the projecting portion 2c of the nozzle clamp 2, and the nozzle clamp 2 is fastened to the cylinder head 1. Projecting part 2c
The pin 7 serving as a locking member is driven into a predetermined position where the protrusion 2c comes into contact with the pin 7 as the bolt 4 is tightened, and the rotation of the nozzle clamp 2 is stopped.
Interference with a nearby object such as the valve spring 6 can be prevented.

[0016]

As described above, according to the present invention, since the nozzle clamp is prevented from rotating and positioned by the locking member provided on the cylinder head and the projecting portion of the nozzle clamp, a valve spring or the like is used when the nozzle clamp is tightened. Therefore, the reliability of the engine can be improved without interfering with nearby objects, and the nozzle clamp can be easily fixed at a predetermined position without requiring skill.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of FIG.

FIG. 3 is a plan view showing another embodiment.

FIG. 4 is a plan view showing a conventional example.

[Explanation of symbols]

 2 Nozzle clamp 3 Nozzle holder 4 Bolt 5 Bolt 6 Valve spring

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F02M 61/14 F02F 1/24

Claims (1)

(57) [Scope of request for utility model registration] 1. A nozzle holder which stands on a cylinder head and accommodates a fuel injection nozzle, and is in contact with the cylinder head.
Has a fulcrum at one end and presses and holds the nozzle holder at the other end
Nozzle clamp and the center of the nozzle clamp
Bolts to be secured to the
A locking member that is located at an extension in the opposite direction,
The nozzle clamp is extended from the fulcrum, and
Stops rotation of nozzle clamp in bolt fastening direction
Mounting structure of the fuel injection nozzle holder of a diesel engine, characterized in that a and Mel projecting portion.