JPS58161679A - Engine suspension system for vibration proof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a so-called link mount type engine suspension system that pivotally connects an engine to a vehicle body through a link, and in particular to a vibration-proofing system that effectively absorbs engine vibrations. It relates to an engine suspension system.

BACKGROUND ART In motorcycles and the like, the Zino 5-mount method, link mount method, and the like have been adopted as methods for suspending the engine on the vehicle body side.

The above link mount method pivots and connects the engine to the vehicle body through a plurality of links arranged substantially parallel to each other.
The engine is constructed so that it can be displaced in the direction of vibration, and is intended to block the propagation of engine vibrations toward the vehicle body.

However, in this type of link mounting method,
Because rubber bushings were interposed at the engine-side and vehicle-side connecting portions of each link, the rigidity in the left-right direction of the vehicle body, that is, the lateral rigidity, tended to be low.

For this reason, the engine is displaced in directions other than the vibration direction, and there are many restrictions on effectively blocking the propagation of engine vibrations to the vehicle body.

In view of the above-mentioned problems with this type of engine suspension system, the present inventor has created the present invention in order to effectively solve the problems.
The purpose of this is to increase the lateral rigidity by arranging bearings and rubber bushings in parallel in the thickness direction of at least one of the engine side connection part and the vehicle body side connection part of each link that suspends the engine. It is an object of the present invention to provide a vibration-isolating engine suspension system that suppresses engine displacement in directions other than the vibration direction, thereby effectively blocking the propagation of engine vibrations to the vehicle body side.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a side view of the rear part of a motorcycle equipped with a suspension system according to the present invention, and FIG. 2 is an enlarged sectional view taken along line 2-2 in FIG.

In a motorcycle 1 shown in FIG. 1, an engine unit 5, which is formed by integrating an engine 3 and a transmission case 4 into a +7 block, is provided at the lower center of a vehicle body 2, spaced apart from each other in the front and back, and arranged substantially parallel to each other. It is suspended on the vehicle body 2 side via a link 6.7.

The engine 3 is arranged approximately horizontally, and a piston (not shown) fitted inside the cylinder of the engine 3 slides approximately horizontally, so that the engine unit 5 is vibrated approximately horizontally.

By the way, the link 6.7 is connected to the engine unit 5.
The upper end of the link 6 is installed on brackets 8a, 8a protruding from the lower part of the main frame 8 of the vehicle body 2, and the lower end is installed on the front upper part of the engine unit 5. The upper end of the other link 7 is connected to the seat post part 2a of the vehicle body 2, and the lower end thereof is connected to the bracket 9 connected to the rear end of the engine unit 5. It is pivoted for free movement.

For example, the F part connecting part A of the link 6 is as shown in FIG.
It is configured. That is, holes 6a, 6a are formed in the upper end of the link 6 in the thickness direction, and in these holes 6a, 6a are ring-shaped collars 11.11 each having a ring-shaped rubber bushing 10 fixed therein by baking or the like. is press-fitted. Bearings 12 and 12 are press-fitted into both outer ends of the holes 5a and 6a as shown in the figure.

The pivot connection to the brackets 8a and 8a at the upper end of the link 6 is as shown in FIG.
a, its collar 11.11 and bearing 12 between 8a
．． 12 is drilled in the brackets 8a, 8a':Cit hole 8
b and 8b, then insert the bolt 13 through the hole 8b, the bearing 12, the collars ii, i1, the bearing 12, and the hole 8b, and finally, the bolt 13
This is accomplished by tightening a nut 14 that is screwed onto one end of the 3.

The lower end connecting portion B of the link 6 is also constructed in exactly the same manner as described above, as shown in FIG. 2, and the other link 7 is also constructed in exactly the same manner as the link 6.

On the other hand, a rear fender portion 2b integrally formed rearward from the seat post portion 2a of the vehicle body 2;
Rear cushions 16.16 are interposed between the rear wheels 15 which are rotatably supported below, and rear cushions 16.16 are interposed between the rear wheels 15 and the bracket 9, and carrier forks 17.17 are pivotably pivoted between the rear wheels 15 and the bracket 9. It is connected. In FIG. 1, 18 is a seat, and 19.degree. 19 is a foot step.

At the connecting portion of the link 6.7, for example, the upper end connecting portion A of the link 6, the collar 11.7 has a bolt 13 inserted therethrough.
Since both ends of the engine unit 11 are fixed by highly rigid bearings 12 and 12, the lateral rigidity of the engine suspension system is high, and therefore the engine unit 5 can be displaced only in the direction of vibration, and cannot be displaced in other directions. is limited. As a result, the propagation of engine vibrations toward the vehicle body is effectively blocked, and minute vibrations are effectively absorbed and alleviated by the vibration absorption effect of the rubber bushes 10.10.

Next, another application example of the suspension system according to the present invention is shown in FIG. The structural link 106 is pivotally connected to the vehicle body frame 102. In this case as well, the lateral rigidity of the suspension system can be increased for the same reason as described above, and as a result, unnecessary displacement of the power unit 105 is suppressed and the engine The propagation of vibrations to the vehicle body side can be effectively blocked.

In the above embodiments, bearings and rubber bushings were arranged side by side in the thickness direction of both connecting parts of the link, but a considerable effect can also be achieved by using the above structure for one of these connecting parts. Ru.

As is clear from the above description, according to the present invention, bearings and rubber bushings are arranged in parallel in the thickness direction of at least one of the engine-side connecting portion and the vehicle body-side connecting portion of each link that suspends the engine. By increasing the lateral rigidity of the system, engine displacement in directions other than the excitation direction can be suppressed.
Therefore, propagation of engine vibration to the vehicle body side can be effectively blocked.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a side view of the rear part of a motorcycle equipped with a suspension system according to the present invention, FIG. 2 is an enlarged cross-sectional view taken along line 2-2 in FIG. 1, and FIG. FIG. 2 is a diagram similar to FIG. 1 according to a modified embodiment; In addition, 5,105 in the drawing is a power unit, 6,7゜106
is a link, 10 is a rubber bush, 11 is a color, 12
16 is a bearing, 16 is a rear cushion, and 17 is a rear fork. Patent Applicant Honda Motor Co., Ltd. Agent Patent Attorney 2 1) Company Name Patent Attorney Kunihiko Ohashi 479-

Claims (1)

[Claims] In an engine suspension system that pivotally connects the engine to the vehicle body through a link, bearings and rubber bushings are arranged in parallel in the thickness direction of at least one of the engine side connecting portion and the vehicle body side connecting portion of each link. Features a vibration-proof engine suspension system.