JPH0953467A - Sealing device of engine full-load stopper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the durability of an engine and prevent environment pollution by keeping the factory-delivered condition of a full-load stopper for controlling the output of an engine and making it difficult for the purchaser to make an easy change in a short time. SOLUTION: The head 4 of a full-load stopper 3 for regulating oscillation more than fixed of an oscillating arm 2 fitted to a machine frame 1 in such a manner as to freely oscillate is installed in a control hole 5 provided on the machine frame 1 from the outside and fixed by a fixture 6, and the head 4 and the outer periphery of the fixture 6 are covered with a cylindrical pan- bottom like cap 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing device for an engine full load stopper.

[0002]

2. Description of the Related Art A conventional engine full load stopper has a small hole opened in a lock nut for fixing attached to the outside of a plurality of stopper bolts protruding to the outside of the engine.
The small holes of the lock nuts at the distant positions were connected with a wire and the wire was sealed with lead.

[0003]

In the stopper sealing after adjusting the output by using such a wire, a malicious worker can easily find the location of the sealing and simply cut the wire. The output could easily be increased simply by adjusting the stopper. If the stopper position adjusted to the optimum position for exhaust gas, fuel consumption, durability, etc. at the time of factory shipment is easily changed, environmental problems and safety during work will also occur.

[0004]

SUMMARY OF THE INVENTION The present invention is to solve such a problem of the conventional device, and has taken the following technical means. That is, the head 4 of the full-load stopper 3 for restricting the swing of the swing arm 2 swingably attached to the machine frame 1 above a certain level is attached from the outside to the adjustment hole 5 provided in the machine frame 1. The head 4 and the outer periphery of the fixture 6 are fixed by a fixture 6, and the cap 7 is covered with a cap 7 in the shape of a cylindrical pot bottom.

[0005]

EXAMPLE An example of a diesel engine 8 is shown in FIG.
The present invention is incorporated in the fuel control section of the engine 8.
Explaining with reference to FIG. 2, an injection pump 9 corresponding to the number of cylinders is provided in a cylinder body 11 on one side of the engine 8, and a cam shaft 10 is provided below the injection pump 9. The cam shaft 10 projects rightward from the end surface 12 of the cylinder body 11, the cam gear 14 is fixed to the projecting end, and the cap 15 is attached to the cap 15 so as to extend and contract in the axial direction. There is.

The cam gear 14 has a plurality of governor weights 1
6 is attached to the shaft 17, and the centrifugal force of the governor weight 16 is changed by the rotation of the cam shaft 10 to apply a load in the axial direction to the cap 15. The upper and lower intermediate portions 19 of the floating arm 18 are in contact with the tip portion of the cap 15.
The floating arm 18 is a swinging link having a lower end portion pivotally supported by a swinging shaft 20 provided in the gear case 13, and an upper end portion having an upper opening U-shaped bifurcated 21. The pin 22 is attached.

Further, another tension arm 23 is attached to the swing shaft 20.
3 has a tubular portion 24 at the upper end, and the spring 2 is provided in the tubular portion 24.
In FIG. 5, a protrusion 26 for applying a load in the direction of the arrow "a" is installed. The tip of the protrusion 26 projects in the contacting direction with the pin 22 described above, and when the tension arm 23 is forcibly moved in the direction of the arrow "a", the floating arm 18 is moved through the protrusion 26 through the arrow "." Press in the "i" direction.

A seat surface 27 is integrally provided above the cylindrical portion 24, and serves as an abutment surface of the full load stopper 3 which is made of bolts or screws and is attached to the machine frame 1 so as to be adjustable in expansion and contraction. The details of this configuration will be described later. The pin 22 of the upper end baffle 21 of the floating arm 18 and the rack pin 29 of the control rack 28 on the injection pump 9 side are interlockingly connected by a control link 30. If the control link 30 moves in the direction of arrow "a", a cam is formed. The amount of fuel injected from the injection pump 9 into the cylinder is increased by the cam rotation drive of the shaft 10, and if the control link 30 moves in the direction of the arrow "a", the amount of fuel injected into the cylinder via the injection pump 9 is increased. Decrease.

Next, the full load stopper 3 will be described in detail with reference to FIG. The example shows a cylinder body 11
A gear case 13 for covering the front part of the
Tension arm 2 attached to swing shaft 20 provided inside
The tip end of the full load stopper 3 is brought into contact with the seat surface 27 of the swing arm 2 which is No. 3. The full load stopper 3 is provided with a screw thread on the outer circumference of the shaft on the side of the head 4, and is inserted from the outside of the machine frame 1 into a screw groove of an adjustment hole 5 opened in the machine frame 1 so as to be adjustable in the axial direction. The outer end of the head 4 of the full load stopper 3 is provided with a negative or positive engaging groove 31 for holding the tip of a driver (not shown) which is a tool, and the length in the axial direction is adjusted. The full load stopper 3 is pressed by a screwdriver and firmly fixed by a fixture 6 such as a nut. And its head 4
The outer periphery of the fixing tool 6 is covered with a cap 7 having a cylindrical pot bottom shape. The cap 7 is sunk from the mounting end surface of the machine frame 1 as shown in FIG. 1, but as shown in FIG.
The cover surface 32 may protrude in a conical shape, and if it cannot be directly grasped by a tool such as pliers or pliers, even if a small amount of the side wall is projected, there is no problem in use.

Swing arm 2 which is tension arm 23
A mounting small hole 33 is opened at the end, and the mounting small hole 33 and the mounting small hole 35 of the control arm 34 are connected by pulling with a governor spring 36. The control arm 34 swings around an upper swing shaft 37 provided in the side wall machine frame of the gear case 13, is located inside the gear case 13, and is exposed outside the side wall of the gear case 13. The lever 38 and the upper swing shaft 3
The interior and exterior are integrally connected via 7. That is, when the control lever 38 outside the case is operated, the control arm 34 inside the case is moved in the same direction via the upper swing shaft 37.

The control lever 38 is substantially L-shaped when viewed from the side. An upper swing shaft 37 is provided at the bent portion, a tension spring 39 is attached between the lower end and the machine frame 1, and a lower limit stopper is provided below the bent portion. 40 is provided. A manual lever 41 is provided on the upper end side of the control lever 38.
The interlocking tool 42 that is interlocked with the operation is connected, and the control lever 38 is forcibly moved in the same direction by the operation of the manual lever 41 in the arrow "B" direction. This control lever 38 is also the swing arm 2 which is an embodiment of the present invention.
a, and after adjusting the contact position of the swinging intermediate part of the swinging arm 2a to the full load stopper 3a, by covering the cap (not shown) in the non-adjusted state as described in the illustrated example, It is possible to prevent the governor spring 36 from changing the specified value of the fuel injection amount without permission.

The movement of the members in the illustrated example will be described below.
In FIG. 1, when the operator moves the manual lever 41, which is the throttle of the engine 8, in the direction of arrow "b", the rotation speed of the engine 8 increases. When the crankshaft is moved to the maximum position to maximize rotation, the external full load stopper 3
The control lever 38, which is the external swing arm 2a, is restricted in the maximum operation amount by a. The movement of the control lever 38 outside the gear case 13 is controlled by the control arm 34 inside the case via the upper swing shaft 37.
To the maximum position. The control arm 34 pulls the tension arm 23, which is the swing arm 2, in the arrow “B” direction via the governor spring 36.

Referring to FIG. 2, the tension arm 23 moves in such a manner that the protrusion 26, which is supported by the spring 25 in the tubular portion 24, projects and supports the pin 2 above the floating arm 18.
2 is pressed and pressed in the direction of arrow "a". This means that by operating the manual lever 41 in the maximum direction, the floating arm 18 moves around the swing shaft 20 with an arrow "a".
Direction is applied through the governor spring 36, and the cap 15 attached to the camshaft 10 due to another magnitude of rotation of the engine 8 which is another force causes a counteracting load in the opposite arrow "a" direction due to the centrifugal force of the governor weight 16. The floating arm 18 acts on the governor spring 36, and as a result, the posture of the floating arm 18 is always in a balanced posture while constantly changing.

The pin 22 moves in accordance with the balance posture position of the floating arm 18, and the control link 30
Is moved to the left or right to increase or decrease the fuel injection amount of the injection pump 9. When maintaining these balance postures, the sudden movement of the tension arm 23 interlocked with the manual lever 41 side is limited by the full load stopper 3 to eliminate a certain amount or more of the influence on the accelerating side of the floating arm 18. Has improved durability.

The structure shown and described with reference to FIGS. 1 to 3 has a structure in which the reuse of the full load stopper 3 is taken into consideration even though it takes time to break the cap 7, but the structure will be described next. Makes it difficult to reuse the adjusting screw. 4 to 6 are provided with a groove 46 for driver engagement and a hole 47 in the axial direction on the head, which is the outward protruding side of the adjustment screw 45, and the adjustment screw 45 is attached to the machine frame 1 to adjust and lock. After fixing the position with the nut 50, insert the foot 49 of the button- or tack-shaped cover 48 into the hole 47 of the head of the adjusting screw 45, and tap the center of the cover 48 with a tool such as a punch to make the foot 49.
By caulking the holes in the hole 47, the purchaser cannot adjust the adjustment screw 45.

7 and 8, after the adjusting screw 45a attached to the machine frame 1 is fixed with the lock nut 50, the tip of the flat chisel 51 is brought into contact with the slit-shaped groove 46a of the head to form the groove 46a. The cover 48a is attached after the lock nut 50 is widened and the lock nut 50 cannot be removed.

[0017]

As described above, the present invention has the following effects.
Since the head 4 and the fixture 6 of the full load stopper 3 are hidden in the machine frame 1 by the cap 7, it is difficult for the operator to know the location of the full load stopper 3 and cannot be easily changed.

[Brief description of drawings]

FIG. 1 is a side view of a main part with a partial cross section.

FIG. 2 is a side sectional view of the entire main part.

FIG. 3 is an enlarged sectional view of an essential part of another example.

FIG. 4 is a side view showing a first example of the same purpose with another structure.

5 is a plan view of the head of the adjustment screw shown in FIG. 4; FIG.

6 is a side view of the cover of FIG. 4. FIG.

FIG. 7 is a side view showing a second example of the same purpose according to another configuration.

8 is an explanatory enlarged view of the head of FIG. 7. FIG.

[Explanation of symbols]

 1 Machine frame 2 Swing arm 3 Full load stopper 4 Head 5 Adjustment hole 6 Fixing device 7 Cap

Claims (1)

[Claims] 1. A head 4 of a full-load stopper 3 for restricting a swing of a swing arm 2 mounted swingably on a machine frame 1 to a predetermined extent or more to an adjustment hole 5 provided on the machine frame 1. A sealing device for an engine full load stopper, characterized in that the head 4 and the fixing device 6 are covered with a cap 7 having a cylindrical pot bottom shape.