JPS606572Y2 - Internal combustion engine lubricating oil pump drive device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lubricating oil pump drive device for delivering lubricating oil to various parts of an internal combustion engine.

Internal combustion engines may have different rotational speeds even if they have the same specifications.

For example, when it is used for ships, it is used for power generation, emergency smoke evacuation, etc. In the case of ships, it is used for safe operation for long periods of time.
It is used for the 200200 Showen, but the land engine mainly uses 18 revolutions in order to obtain high horsepower.

Lubricating oil pumps, on the other hand, derive their rotation from the internal combustion engine's crankshaft, but each pump has a rotation speed at which it can achieve maximum efficiency, and a gear system is designed to achieve that rotation speed.

For example, if a gear train is determined to achieve maximum efficiency at a constant rotation speed of 1208 revolutions per minute,
If the pump rotates at 0 rotations, the pump will be damaged, and conversely, a pump designed to reach its maximum efficiency at 180 rotations will have a lower discharge volume if it is driven at 12 rotations, or the pump will have too much leeway. This resulted in excessive quality and wasted use.

In order to change the rotational speed of the lubricating oil pump when the rotational speed of the lubricating oil pump is different when the rotational speed is always used, as shown in FIGS. Since the gear diameter is determined, in order to change the rotation speed of the lubricating oil pump, the number of teeth on the lubricating oil pump drive gear 14 must be changed.If the number of teeth on the gear 14 is changed, the meshing will be improved. The position of the lubricating oil pump drive shaft 16 must be moved to
It had moved through the spigot hole of the cylinder block or gear case 12.

In the present invention, the axial center position of the lubricating oil pump drive shaft is changed by rotating the pump case 15 within the spigot hole using the spigot part 15a so that there is no need to move the spigot hole. , two holes for fixing the pump case are opened on the surface of the gear case 12 so that they can be used for both purposes.

The purpose of the present invention is as described above, and the structure of the present invention will be explained based on the structure of the embodiment shown in the attached drawings.

FIG. 1 is an overall front view of a diesel engine among internal combustion engines.

A base plate 2 is fixed on the lower surface of the cylinder block 1, a cylinder head 4 is mounted on the upper surface of the cylinder block 1, and a valve arm chamber 5 is mounted on the upper part of the cylinder head 4.

A flywheel 10 is fixed to the right end protrusion of the crankshaft in the cylinder block 1, and a reversing speed reducer 3 is installed at the left end.
Insert into.

The rotation of the crankshaft is taken out into the gear case 12, and the rotational force is taken out from the fuel injection pump drive device 9 to drive the integral fuel injection pump 8 and the governor device 7.

11 is an instrument panel, and 6 is an air supply manifold.

Figure 2 is a front sectional view of a conventional lubricating oil pump drive device.
The figure is a side view of FIG. 2.

Power is transmitted to the pump drive gear 14 by the intermediate gear 13,
Rotate the pump drive shaft 16.

A pump gear 18 is spline-fitted to the pump drive shaft 16, and a driven gear 19 is loosely fitted to the counter shaft 17, and lubricating oil is pumped through the gear meshing portion.

Reference numeral 20 denotes a pump case lid body, and a lubricating oil inlet 15b and a lubricating oil outlet 15c are opened on the side surface of the pump case 15.

A spigot fitting part 15 a is provided on the right side of the pump case 15 , and is fitted into a spigot hole in the gear case 12 and fixed with a bolt 23 .

Conventionally, the center of this pilot fitting portion 15a coincided with the center of the pump drive shaft 16, so the pilot fitting portion 15a coincided with the center of the pump drive shaft 16.
Even if the pump case 15 is rotated in step a, the center position of the drive gear 14 cannot be changed, and the distance between the axis of the intermediate gear 3 and the drive gear 14 cannot be changed, so a small diameter with a small number of teeth can be used. When manufacturing a model with a higher pump rotation speed using the gear 14a, the position of the spigot hole was changed when the gear case 12 was processed.

Fig. 4 is a front sectional view of the lubricating oil pump drive device of the present invention. Fig. 5 is a drawing showing the installation state of the lubricating oil pump when a small diameter pump driving gear 14a is used. Fig. 6 is a large diameter pump driving gear. 14b is a drawing showing the installation state of the lubricating oil pump when using the lubricating oil pump.

A cooling water pump 21 driven by an intermediate gear 13 is shown.

Driven by a cooling water pump drive gear 22, the cooling water inlet 2
The water is sucked in through the cooling water outlet 1a and discharged through the cooling water outlet 21b.

In the present invention, a lubricating oil inlet 15a and a lubricating oil outlet 15b are provided at the top of the lubricating oil pump case 15, so that even if the pump case 15 is rotated and attached, the outlet and the inlet will not be difficult to attach. ing.

The center of the spigot fitting part 15a of the pump case 15 is placed at an intermediate position between the axis of the pump drive shaft 16 and the axis of the counter shaft 17, and when the pump case 15 is rotated, the drive gear 14 and the pump drive shaft are rotated. 16 moves, and the distance between the shafts and the center position of the intermediate gear 11 changes.

In the case of FIG. 5, the rotation speed of the internal combustion engine is always low, and the lubricating oil pump drive gear 14 is a small-diameter gear 14a, and the pump case 15 is fixed in the bolt hole with the bolt 23 in the clockwise position. There is.

In the case of FIG. 6, the internal combustion engine is always used at a high rotational speed, and the lubricating oil pump drive gear 14 is a large-diameter 14b gear, and the pump case 15 is fixed in the bolt hole with a bolt 23 at a position where the pump case 15 is rotated counterclockwise. ing.

These two types of installation are possible in gear case 12.
There are two types of bolt holes.

As described above, the present invention is based on a method in which the center of a part of the spigot provided for fixing the lubricant pump case to a cylinder block or a gear case fixed to the cylinder block is located at a point other than the center of the lubricant drive shaft. By rotating and installing the lubricating oil pump case within the spigot fitting part, the distance between the intermediate gear and the lubricating oil pump drive shaft can be changed, and the teeth of the pump driving gear fixed to the lubricating oil pump drive shaft can be changed. Since the number of pumps can be changed, it is now possible to change the pump rotation speed and discharge amount simply by changing the number of teeth on the drive gear and changing the mounting position of the pump case.

[Brief explanation of drawings]

Figure 1 is a front view of a diesel engine among internal combustion engines.
Figure 2 is a front sectional view of a conventional lubricating oil pump drive device;
The figure is a side view of FIG. 2, FIG. 4 is a front sectional view of the lubricating oil pump drive device of the present invention, and FIG. 5 is a drawing showing the installation state of the lubricating oil pump when a small diameter pump driving gear is used. FIG. 6 is a drawing showing the state of the lubricating oil pump when a large-diameter pump drive gear is used. 12... Gear case, 13... Intermediate gear, 14... Lubricating oil pump drive gear, 15...
... Pump case, 15a ... Pilot fitting part, 16 ... Lubricating oil pump drive shaft.

Claims (1)

[Scope of utility model registration request] Place the center of the spigot provided to secure the lubricating oil pump case to a cylinder block or a gear case etc. fixed to the cylinder block at a point other than the center of the lubricating oil pump drive shaft, and attach the lubricating oil pump case. By rotating and installing the gear in the spigot fitting part, the distance between the intermediate gear and the lubricating oil pump drive shaft can be changed, and the number of teeth of the pump driving gear fixed to the lubricating oil pump driving shaft can be changed. A lubricating oil pump drive device for an internal combustion engine, characterized by: