JPH034757Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an adjustment lever device for an engine.

<Prior Art> Conventionally, a speed regulating lever device for a vertical diesel engine generally has a structure shown in Japanese Utility Model Publication No. 59-3162.

As shown in FIG. 7, a governor device 57 is provided across a pump housing 55 and a gear casing 56, and a speed regulating lever shaft 58 is rotatably supported on the upper wall of the gear casing 56. A governor spring lever 59 is attached to the inner end of the speed lever shaft 58.
In addition, a speed regulating lever 60 is fixed to the outer end, and the speed regulating lever 60 is connected to a maximum rotation adjustment screw (not shown) and an idle rotation adjustment screw 6.
1 and adjust the tension of the governor spring 62 to control the engine speed.

<Problems to be solved by the invention> The device configured as described above had the following problems.

(a) Since the speed control lever 60 and speed control lever shaft 58 are positioned and fixed by the key 63, the speed control lever 6 can be
If the operating direction of 0 is different, it is necessary to manufacture and assemble a speed regulating lever 60 that matches the operating direction each time, and readjust the maximum rotation adjustment screw and idle rotation adjustment screw 61, which requires time and effort. , there was a problem of poor productivity.

(b) Moreover, the maximum rotation adjustment screw and the idle rotation adjustment screw 61 are exposed to the outside, and the user can operate these screws 61 to change the swing operation range of the speed regulating lever 60 set by the manufacturer, and the engine It throws me off track.

In order to solve the above problem (a), a structure disclosed in Japanese Utility Model Application Publication No. 55-76834 is known as a structure that allows the operating direction of the speed regulating lever to be easily changed.

As shown in FIG. 8, the speed regulating lever 65 and the wire spool 66 operated by the lever are fitted together using splines 67 and 68, and the speed regulating lever 65 and the wire spool 66 are fitted together using a fixing screw 69. By unscrewing the fixing screw 69 and changing the fitting angle between the regulating lever 65 and the wire spool 66, the operating direction of the regulating lever 65 can be changed.

However, in such a device, in order to change the operation direction and operation range of the speed governor lever 65 adjusted at the time of engine assembly depending on the mounting condition on the work machine, the fixing screw 69 is unscrewed, and the speed governor lever 65 and the wire are connected. When the spline fitting with the spool 66 is released, the wire spool 66 will shift and move.
The operating range of the speed regulating lever 65 will be greatly deviated. Therefore, in order to prevent this, it is necessary to fit the regulating lever 65 with a spline while fixing the wire spool 66 so that it does not shift, which requires skill and has poor workability. Ta.

The present invention was proposed in view of the above-mentioned problems.It is possible to change the direction of operation of the speed control lever, thereby making the speed control lever common. The purpose is to prevent

<Means for Solving the Problems> In order to achieve the above object, the present invention includes a pump bousing 7 and a gear casing 8 on one side of the engine 1, as shown in FIGS. 1 to 6, for example. A governor device 9 is provided in the lower part of the pump housing 7, and a fuel injection pump 10 is provided in the upper part of the pump housing 7, and the operating device assembly opening 21 opened in the pump housing 7 is covered with a case fixing wall 23. The regulating lever shaft 24 is rotatably supported in a bearing hole 50 provided in the case fixing wall 23. Speed regulating lever D
is composed of a regulation lever 26 and an operating lever 43, the regulation lever 26 is fixed to the regulating lever shaft 24 near the case fixing wall 23, and a maximum rotation adjustment screw 28 is used to set the maximum rotation position A of the regulation lever 26.
An idle rotation adjustment screw 29 for setting the idle position B is provided on the case fixing wall 23.

Next, the maximum rotation adjustment screw 28, the idle rotation adjustment screw 29, and the regulation lever 26 are covered with a cover 42 that is fixed to the case fixing wall 23, and the control lever shaft 24 that protrudes from the cover 42 controls the operating lever 43.
The angle changing means T is used to fix the angle.

<Function> When changing the operating direction of the regulating lever D, the regulating lever device configured as described above releases the angle changing means T and moves the operating lever 43 toward the regulating lever shaft 2.
Remove from 4. At this time, the limiting lever 26 fixed to the regulating lever shaft 24 within the cover 42 is received by the idle rotation adjustment screw 29 or the maximum rotation adjusting screw 28, and the operating lever 43 is set at a desired angle to the regulating lever shaft. If it is fixed at 24, the operating direction of the regulating lever D can be changed without disturbing the operating range.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 is an exploded perspective view of a speed-governing lever device according to the present invention, FIG. 2 is a vertical side view of the speed-governing lever device of an engine, and FIG. 3 is a partially vertical side view thereof.

In the figure, reference numeral 1 indicates an engine, and the engine 1 includes a crankcase 2, a cylinder block 3 integrally formed above the crankcase 2, and a head block 4 placed and fixed in order above the cylinder block 3.
The engine body 6 is formed by the head cover 5 and the head cover 5.

A pump housing 7 is integrally formed on one side of the crankcase 2 and the cylinder block 3, and a front opening of the pump housing 7 is covered with a gear case 8.

A governor device 9 is provided in the lower part of the pump housing 7, and a fuel injection pump 1 is provided in the upper part.
0 is attached.

The governor device 9 includes a centrifugal governor 11, a governor lever 12 that is swung toward the fuel decreasing side L by the governor force, and a governor spring 13 that presses the governor lever 12 toward the fuel increasing side R.

The governor lever 12 consists of a main governor lever 14 and a sub-governor lever 15.
The upper end of the fuel injection pump 10 engages with a control rack (fuel adjustment rack) 16 of the fuel injection pump 10, and is biased toward the fuel increasing side R by a start spring 17. A governor spring 13 whose tension is adjusted by a governor spring lever 18 is connected to the upper end of the sub-governor lever 15 .

The tension of the governor spring 13 acting on the sub-governor lever 15 is transmitted to the main governor lever 14 via a torque spring device 19 provided on the main governor lever 14.

The fuel injection pump 10 is driven by a fuel injection camshaft 20 rotatably supported across the front and rear of the pump housing 7.

An operating device assembly inlet 21 for adjusting the tension of the governor spring 13 is formed in the side wall 7a of the pump housing 7 to which the fuel injection pump 10 is attached, and an operating device 22 is attached to this operating device inlet 21. It is covered with a case fixing wall 23.

As shown in FIG. 1 and FIG. 4 to FIG.
The regulating lever shaft 24 and the stop lever shaft 25 are passed through the lever shaft 24 and the stop lever shaft 25 is rotatably supported, and the arm portion of the regulating lever 24 protrudes outward from the case fixing wall 23 and has a fan-shaped arm near the case fixing wall 23. A governor spring lever 18 to which a governor spring 13 is connected is attached to the inner end of the regulating lever shaft 24, which fixes the regulating lever 26 and projects into the pump housing 7.

Regulation lever 2 attached to speed regulating lever shaft 24
6 swings between a maximum rotation adjustment screw 28 and an idle rotation adjustment screw 29 provided on the case fixing wall 23, and the maximum rotation position A (phase image line in Figure 4) is set by the maximum rotation adjustment screw 28. Idle rotation position B (solid line in FIG. 4) is set by an idle rotation adjustment screw 29.

The maximum rotation adjustment screw 28 and the idle rotation adjustment screw 29 are installed in respective screw holes 32 and 33 of a maximum rotation adjustment screw installation boss 30 and an idle rotation adjustment screw installation boss 31 formed protruding from the case fixing wall 23.
The screws 28, 29, which are screwed together and positioned, are locked with lock nuts 34, 35.

In addition, the case fixing wall 2 of the stop lever shaft 25
A stop regulation lever 36 is attached to the third portion.

This stop regulation lever 36 is screwed into a stop release position protrusion 37 protruding from the case fixing wall 23 and a stop operation position setting boss 38 so as to be adjustable forward and backward, and a stop position adjustment screw 40 which is locked with a lock nut 39. It is configured to swing between
An operating arm 41 attached to the inner end of the stop lever shaft 26 swings the governor lever 12 to the fuel reduction side L, causing the fuel injection pump 10 to perform no injection and stopping the engine 1.

The regulation lever 26, the stop regulation lever 36, the maximum rotation adjustment screw 28, the idle rotation adjustment screw 29, the top position adjustment screw 40, and each of these lock screws 34, 35, and 39 are attached to a cover fixed to the case fixing wall 23. It is covered with 42,
The end portions of the regulating lever shaft 24 and the stop lever shaft 25 are made to protrude outward from the cover 42.

An operating lever 43 and a stop lever 44 are respectively attached to the tips of the regulating lever shaft 24 and the stop lever shaft 25 protruding from the cover 42 via angle changing means T, and the operating lever 43 and the regulating lever 26 A speed regulating lever D is formed.

The angle changing means T is formed by a spline 45 carved near the tip of each lever shaft 24, 25, and a spline hole 46 formed in each proximal boss portion 43a, 44a of the operation lever 43 and stop lever 44. Ru.

Incidentally, reference numerals 47 and 48 in the figure are fixing nuts for fixing the operating lever 43 and the stop lever 44 to prevent them from coming off.

Further, as shown in the figure, when each screw head 28a, 29a, 40a of the maximum rotation adjustment screw 28, idle rotation adjustment screw 29, and stop position adjustment screw 40 protrudes outside the cover 42, for example, the maximum rotation adjustment screw 28, the idle rotation adjustment screw 29, and the stop position adjustment screw 40 may be As shown by the imaginary line on the rotation adjustment screw 28,
The side wall portion 42a of the cover 42 and the screw head 28a may be connected with a seal 49 so that the adjustment screw 28 cannot be operated accidentally.

In addition, the angle changing means T may be replaced with the spline fitting described above, and the operating lever 43 may be fixed to the regulating lever shaft 24 with screws (not shown), or the spline fitting of the regulating lever shaft 24 may be used. Instead of 45, one key may be embedded.

Furthermore, the case fixing wall 23 may be one side wall of the pump casing 7 instead of being an independent component.

With the above configuration, when changing the operating direction of the operating lever 43 and the stop lever 44,
First, the lock nuts 47 and 48 are unscrewed, and the operating lever 43 and the stop lever 44 are removed from the respective lever shafts 24 and 25.

After this, the operating lever 43 and the stop lever 4
Splines 45, 4 are provided on each lever shaft 24, 25 by aligning the splines 4 in the desired operating direction.
The spline holes 46 formed in the operating lever 43 and the stop lever 44 are fitted into the spline hole 5 .

At this time, the regulating lever 26 attached to the case fixed wall 23 side of the regulating lever shaft 24 is connected to the governor spring 13 via the governor spring lever 18.
The control lever 43 is received by the idle rotation adjustment screw 29 with a tension of 1, and the operation lever 43 can be fitted to the idle rotation position in the desired operation direction.

Further, the stop lever shaft 25 moves the stop regulating lever 36 to the stop release position projection 37.
Alternatively, the stop lever 44 is aligned with either one of the stop position adjustment screws 40, and the stop lever 44 is fitted onto the outside of the stop lever 44 in accordance with the above-mentioned aligned position in the desired operating direction.

In this way, the operating lever 43 whose operating angle has been changed
and the stop lever 36 is again locked at the lock nut 4.
When the levers 7 and 48 are fixed, both levers 43,
46 allows the operating direction to be changed correctly without disturbing the operating range.

<Effects of the Invention> The present invention is constructed and operates as described above, and thus has the following effects.

That is, the operating direction of the regulating lever can be changed to a desired operating direction by using the angle changing means of the operating lever attached to the regulating lever shaft. As a result, the speed regulating lever can be shared among working machines with different operation directions, and mass production can be carried out at low cost.

In addition, when the control lever is removed from the speed control lever shaft, the control lever provided on the speed control lever shaft is regulated to the operating range set by the maximum rotation adjustment screw and the idle rotation adjustment screw, so the control lever installed on the speed control lever shaft is The operating range of the reinstalled operating lever will not shift or go out of order. This eliminates the need to adjust the maximum rotational position and idle rotational position each time after changing the operating direction of the speed regulating lever, as in the past, and greatly improves work efficiency.

In addition, the maximum rotation adjustment screw that sets the operating range of the speed regulating lever, the idle rotation adjustment screw, and the lock nut and regulation lever that fix each adjustment screw are covered with a cover to prevent users from operating the adjustment screws indiscriminately. This can prevent the engine from going out of order.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the present invention,
FIG. 1 is an exploded perspective view of the speed regulating lever device, FIG. 2 is a longitudinal sectional front view of the governor device portion of the engine, FIG. 3 is a side view thereof, and FIG. 4 is a partially longitudinal sectional side view of the speed regulating lever device. 5 and 6 are sectional views taken along lines - and -, respectively, of FIG. 4, FIG. 7 is a view corresponding to FIG. 3 according to a conventional example, and FIG. 8 is an exploded perspective view according to a known example. . A...Maximum rotation position, B...Idle rotation position, D...Governing lever, T...Angle changing means, 1
... Engine, 9 ... Governor device, 18 ... Governor spring lever, 23 ... Case fixing wall, 2
4... Speed control lever shaft, 26... Regulation lever, 28
... Maximum rotation adjustment screw, 29 ... Idle rotation adjustment screw, 34, 35 ... Lock nut, 42 ...
Cover, 43...operation lever, 50...bearing hole.

Claims (1)

[Scope of utility model registration request] Case fixing wall 23 of governor device 9 of engine 1
The governor spring lever 18 is fixed to the inner end of the governor lever shaft 24, and the governor lever D is fixed to the outer end of the shaft. Maximum rotation adjustment screw 28 that holds lever D at maximum rotation position A and idle rotation position B
and the idle rotation adjustment screw 29 to the case fixing wall 2.
In the engine speed regulating lever device configured by screwing into respective bosses 30, 31 fixedly installed on the engine 3 and locking with respective lock nuts 34, 35, the speed regulating lever D is constituted by an operating lever 43 and a regulating lever 26. The operating lever 43 is arranged at the outer end of the regulating lever shaft 24 so that its angle can be changed along the rotational direction of the regulating lever shaft 24 using angle changing means T, and the case fixing wall 2 at the outer end of the regulating lever shaft 24
3. Fix the regulation lever 26 at the part close to 3, and install the maximum rotation adjustment screw 28 at the position where the regulation lever 26 is received.
and idle rotation adjustment screw 29, and cover each lock nut 34, 35 of both adjustment screws 28, 29 and regulation lever 26 with cover 42,
This speed regulating lever device for an engine is characterized in that a cover 42 is fixed to a case fixing wall 23 with an operating lever 43 exposed outside the cover 42.