JPS603322Y2 - Engine auxiliary equipment mounting device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of an accessory mounting device for an engine.

An auxiliary equipment mounting device has already been proposed in which a bracket to which an auxiliary equipment driven by an engine is fixed via a timing belt is attached to the engine by a fastening member passing through a long hole provided in the bracket.

By the way, to adjust the tension of the timing belt,
In the past, when moving the bracket itself, the bracket had to be pushed and pulled by hand when the fastening members were not fastened, making fine adjustment of the tension extremely difficult and requiring a considerable amount of time. .

This invention was made to solve the above-mentioned conventional problems, and the bracket can be moved by rotating the eccentric cam member, making it possible to easily and quickly fine-tune the tension of the timing belt. In addition, a timing adjusting member for the auxiliary equipment with respect to the drive pulley is provided so that it is possible to adjust timing deviations of the auxiliary equipment due to movement of the bracket.

Hereinafter, embodiments of this invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 1, a drive pulley 4 is attached to a camshaft 3 protruding from the upper part of the side wall 2 of the engine 1, and a round hole on the upper side of the bracket 6 is passed through the port 5 planted on the side wall 2. , the bracket 6 is rotatably attached by screwing the nut 7 together, and arc-shaped elongated holes 8 and 9 centered on the nut 7 are provided in the lower and upper parts of the bracket 6, respectively;
A mounting bolt 11 (fastening member) is passed through the elongated hole 9 in the upper part and screwed into the side wall 2, and the elongated hole 8 in the lower part is screwed into the side wall 2.
A mounting bolt 10 (fastening member) is passed through and screwed into an auxiliary bracket 12 bolted to the side wall 2.

At the lower part of the bracket 6, auxiliary equipment 13 such as a fuel injection pump is rotatably adjusted with respect to the bracket 6 around its output shaft 14, and interlocking between the drive pulley 4 and the auxiliary equipment pulley 19 is established. In order to correct the relationship, that is, to change the injection timing of the fuel injection pump 13, the pump 13 is fastened and fixed by passing bolts 17 and 18 through long holes 15 and 16 provided in the bracket 6.

Further, an auxiliary pulley 19 is attached to the output shaft 14, and a timing belt 20 is stretched between it and the drive pulley 4.

Therefore, in the above configuration, when the mounting bolts IO and 11 are loosened, the bracket 6 can be rotated about the bolt 5.

On the other hand, in the center part of the bracket 6, there is a second
As shown in detail in FIG. 2C and FIG. Eccentric cam member 24 having an eccentric portion 23 in sliding contact with the peripheral wall 21a
A nut 25 is screwed onto the upper part of the bolt 22, and the eccentric cam member 24 is fastened and fixed at the rotation adjustment position by the nut 25.

If the auxiliary equipment mounting device for the engine 1 is configured as described above, the nut 7. which fastens and fixes the bracket 6.
25 and mounting bolts 10 and 11, and rotate the eccentric cam member 24 manually using a tool such as a spanner, the eccentric portion 23 comes into sliding contact with the inner circumferential wall 21a of the round hole 21, and the entire bracket 6 is attached to the bolt. 5, the distance between the axes of the auxiliary pulley 19 relative to the drive pulley 4 can be expanded or narrowed, and fine adjustments can be made while measuring the tension of the timing belt 20.

After adjusting the tension of the timing belt 20, the nut 2
5, the eccentric cam member 24 is fastened and fixed, then the nut 7 and the mounting bolts 10 and 11 are fastened, and the bracket 6 is fastened and fixed again.

In this manner, the tension of the timing belt 20 is finely adjusted by manually rotating the eccentric cam member 24.

When the above adjustment is performed, the synchronization relationship, that is, the timing, between the drive pulley and the auxiliary pulley 19 is shifted.

Therefore, this can be done by loosening bolts 17 and 18 and pump 13.
By rotating around its output shaft 14,
Adjust injection timing.

In the above embodiment, the eccentric part 23 of the eccentric cam member 21 was made to slide into contact with the inner circumferential wall 21a of the round hole 21 provided in the bracket 6. Alternatively, the eccentric portion 23 may be configured to slide into contact with a peripheral wall erected on the upper surface of the bracket 6 instead of a round hole or a recess.

Further, in the above embodiment, the bracket 6 is centered around the bolt 5.
However, there is no particular need for rotation, and the round hole through which the bolt 5 passes may be a long hole similar to the other long holes 8 and 9.

As is clear from the above explanation, this invention moves the bracket via the cam sliding peripheral wall provided on the bracket by rotating an eccentric cam member placed relative to the bracket to which the auxiliary equipment is fixed. Because it was done,
The tension of the timing belt can be easily and quickly finely adjusted by simply rotating the eccentric cam member.

Furthermore, since it is basically only necessary to provide an eccentric cam member, the structure is extremely simple and can be manufactured at low cost.

Furthermore, since the bracket is provided with a timing adjusting member for the auxiliary equipment relative to the drive pulley, it is possible to adjust timing deviations of the auxiliary equipment due to movement of the bracket.

[Brief explanation of the drawing]

Figure 1 is a side view of the accessory mounting device, Figure 2a is a sectional view of the eccentric cam member, Figure 2 is a nut side side view of Figure 2a, and Figure 2C is A of Figure 2a. -A sectional view. DESCRIPTION OF SYMBOLS 1... Engine, 2... Side wall, 4... Drive pulley, 6... Bracket, 8, 9... Long hole, 10, 11
...Mounting bolt, 13...Auxiliary equipment, 19...Auxiliary equipment pulley, 20...Timing belt, 21...Round hole, 21a...Inner peripheral wall, 23...Eccentric part, 24...
Eccentric cam member, 25...nut.

Claims (1)

[Scope of Claim for Utility Model Registration] In an auxiliary equipment mounting device in which a bracket to which an auxiliary equipment driven by an engine is fixed via a timing belt is attached to the engine by a fastening member passing through a long hole provided in the bracket, the above-mentioned disposing an eccentric cam member with respect to the bracket, and providing the bracket with a cam sliding peripheral wall that contacts the eccentric cam member, and moving the bracket by rotating the eccentric cam member when the fastening member is not fastened; An accessory mounting device for an engine, characterized in that the tension of the timing belt can be adjusted, and a timing adjustment member for the accessory with respect to the drive pulley is provided on the bracket.