JPS6033285Y2 - Oil pump installation structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mounting structure for an oil pump that utilizes the driving force of an engine.

The oil pump is usually supported on the engine at three points via brackets.

However, since each of these three-point support points uses independent bolts as tightening members, the deformation acting on the bolts cannot be effectively absorbed, and they tend to loosen. .

In addition, with the same structure, independent bolts are sometimes used, which makes assembly work less convenient.

This is because the oil pump described above requires a tightening position on the pulley side and on the back side of the pulley.
This is because it is difficult to attach or detach the oil pump or adjust the belt tension without removing the pulley.

The purpose of this invention is to obtain an oil pump mounting structure that can eliminate the above-mentioned conventional drawbacks, and the oil pump is supported by a U-shaped bracket fixed to the engine with the following structure. .

(7) A single through bolt is tightened from the back side of the pulley to serve as a rotational fulcrum for the oil pump during installation and adjustment, and the oil pump is supported at two points so that it can be tightened and loosened freely.

(a) In order to rotate the oil pump using the support point as a fulcrum, the other support bolt was supported through a long hole provided in the bracket so as to serve as the adjustment support point.

(1) A working hole is provided on the pulley surface facing the other support bolt, which serves as an adjustment support point, to allow the support bolt to be tightened or loosened.

The present invention will be explained below based on the embodiments shown in FIGS. 1 and 2.

In Figure 1, 1 is the engine, 2 is the oil pump,
The oil pump 2 is attached to a bracket 3 fixed to the engine 1 and having a U-shaped cross section, as shown in FIG.

Note that 2a is the drive shaft of the oil pump 2, and 5 is the drive shaft 2.
5a is a working hole provided in the pulley 5, 4 is a belt that transmits the rotation of the engine 1 to the pulley 5, 6 is a washer, and 7 is a tightening nut for the pulley 5.

As shown in Fig. 2, the bracket 3 has a U-shape consisting of a central inclined plate, a left side plate (low height), and a right side plate (high height), and the U-shaped bracket 3 is attached to the oil pump 2. At this time, the abutting surface to the pump 2 coincides with the end surface of the pump.

One through bolt (long span) 8 is inserted into the bolt insertion screw hole provided at two locations on both sides of the lower part of the oil pump 2, and in the U-shaped bracket 3, the same bracket 3 is attached to the oil pump 2 as shown in Fig. 2. In the assembled state, the oil pump 2 is inserted and screwed into the bolt insertion holes (lower part of the pump drive shaft 2a) provided at positions corresponding to the screw holes of the oil pump 2 through the washers 9, and then screwed with the nuts 10. The oil pump 2 is attached via a bracket 3 by tightening.

In other words, a nut 10 can be freely tightened and untightened from the back side of the pulley 5 using a single through bolt 8 to serve as a rotational fulcrum for the oil pump 2 when adjusting its installation. B.

C side).

Figure 4 shows the conventional mounting structure at part B or C in Figure 2, where the bolt 13 is shorter than the one long bolt 8 mentioned above, and only that part is tightened. The drawbacks are as mentioned above.

Further, FIG. 3 shows another embodiment of the section C in FIG.
The difference is that 2 is used.

Next, the other bolt 11 is attached to the upper right side of the oil pump 2 through the elongated hole 3a (located in the upper part near the pump drive shaft 2a) provided at the upper part of the right side plate of the U-shaped bracket 3. It is screwed into the screw hole provided in and tightened.

In other words, the other support bolt 11 is used as an adjustment support point so that the oil pump 2 can be rotated using the two points (B and C in FIG. 2) as fulcrums. Tightening or untightening is done through a working hole 5a provided on the surface of the pulley 5 facing the support bolt 11.

As mentioned above, the present invention is fixed to the engine 1 and is configured to be able to abut against the end faces of the oil pump, and corresponds to the mounting adjustment work hole 5a provided in the pulley 5 that transmits engine rotation to the oil pump. A bracket 3 has a U-shaped cross section and has a long hole 3a at a position where the oil pump 2 is inserted, and bolt insertion holes corresponding to the screw holes provided on both sides of the lower part of the oil pump 2. At this point, screw the bolts into the bolt insertion holes on both sides of the lower part and the corresponding threaded holes on the oil pump side from the opposite side of the pulley 5.
To tighten the support at a point, use one through bolt 8 for fixing, screw it into a threaded hole on the oil pump side provided at a position corresponding to the long hole 3a of the bracket through the long hole 3a of the bracket, and 1
This oil pump mounting structure is characterized in that it includes a bolt 11 for tightening and fixing, which serves as an adjustment support point when rotating the oil pump using a main through bolt 8 as a fulcrum.

That is, in the present invention, (I) two lower support points B of the oil pump during installation adjustment;
Since the C section is configured so that one through bolt 8 is used as a rotation fulcrum, and the other support bolt 11 is used as an adjustment support point so that the oil pump can be rotated, conventional independent bolts can be used. The assembly to be done is compared to the work.
In addition to being able to carry out tightening work, the single through bolt 8 used during tightening is made of a long span bolt, and deformation acting on the bolt can be absorbed, so that problems such as loosening do not occur. There is no.

(n) At the time of installation adjustment, the tension of the belt 4 can be easily adjusted by providing the part for tightening or loosening the rotational fulcrum of the oil pump on the opposite side of the pulley (section C in Figure 2). be able to.

(III) Since the surface of the bracket that abuts against the oil pump is made to match the end surface of the pump, the position of the upper bolt 11 for adjusting the tension of the belt can be set close to the center of the drive shaft of the pump. A compact mounting structure can be achieved (if the abutting surface with the bracket is set further back from the bearing end face of the drive shaft, the bracket must escape to prevent it from hitting the bearing, so the size of the bracket and the size of the pump (This is because the size becomes large, resulting in disadvantages in both weight and cost.)
.

[Brief explanation of the drawing]

Figures 1 and 2 show one embodiment of the present invention. Figure 1 is a side view of the oil pump mounting structure seen from the engine side, and Figure 2 is a side view of Figure 1 viewed in the direction of arrow A. FIG. 3 is a longitudinal sectional view of part 1 showing another embodiment of part 0 in FIG. 2;
FIG. 4 is a partial longitudinal sectional view showing a conventional mounting structure corresponding to section B or section 0 in FIG. 2. FIG. 1: Engine, 2 oil pump, 3 nib bracket, 3
a: long hole, 5: pulley, 5a: working hole, 8: through bolt, 11: bolt.

Claims (1)

[Scope of utility model registration request] It is fixed to the engine and is configured so that it can abut against the end face of the oil pump, and has elongated holes at positions corresponding to the mounting adjustment work holes provided in the pulley that transmits engine rotation to the oil pump. A bracket with a U-shaped cross section has bolt insertion holes corresponding to the screw holes provided on both sides of the lower part of the pump, and when the bracket is butt-mounted to the oil pump, each of the bolt insertion holes on both sides of the lower part These are screwed into the respective threaded holes on the oil pump side from the opposite side of the pulley and supported at two points on both sides of the lower part of the pump. Screw into the screw hole on the oil pump side provided at the position corresponding to the same elongated hole through the
A mounting structure for an oil pump, characterized in that the one through-bolt is a fulcrum and has a tightening port that serves as an adjustment support point when rotating the oil pump.