JPS6251762B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a power unit rear stopper mechanism that restricts the rear side of a power unit mounted on a vehicle body, particularly an FR power unit, from bouncing up and down with respect to the vehicle body. be.

As a conventional rear stopper mechanism, for example, there is one in which stopper rubber is directly sintered onto a mount member facing the rear lower surface of the power unit.

Such a rear stopper mechanism has the advantage that since the stopper rubber is firmly fixed, the direction in which the power unit collides with the stopper rubber is not limited. However, when the stopper rubber is sintered into a large member such as a mount member, the mount member is difficult to handle during work. This required processing, which caused an increase in costs.

As a means to improve this problem, the rubber for the stopper is sintered in advance into a bracket that is easy to handle, and this bracket is fixed with screws on the mount member facing the lower surface of the rear side of the power unit to attach the stopper. A system was devised in which the rubber for the power unit was placed opposite the bottom surface of the power unit (in 1988).
52421). However, with this method, the stopper rubber is fixed within the narrow gap between the power unit and the mount member via the bracket.
The stopper rubber approaches the lower surface of the power unit by the height of the bracket, and the gap between the stopper rubber and the power unit becomes extremely narrow. For this reason, the power unit is likely to collide with the stopper rubber, and even in a normal vibration state, the power unit may come into contact with the stopper rubber and transmit vibrations to the vehicle body. Also, it seems possible to reduce the thickness of the rubber for the stopper and widen the gap between it and the power unit, but in this case, when the rubber for the stopper collides with the power unit, it is necessary to sufficiently absorb the impact. It is something that cannot be done. Furthermore, the ground clearance of the vehicle must be kept above a certain level, and in order to make effective use of the space inside the vehicle, the space for the rear side of the power unit is determined to be approximately constant, so the thickness of the stopper rubber must be changed. It was not possible to increase stopper clearance without this.

Therefore, this invention was made in view of the above points and also focused on the fact that the rear side of the power unit mainly only bounces up and down, and is easy to manufacture and install. This provides a stopper mechanism that is advantageous in terms of weight and space.

In order to achieve this object, the present invention mounts the rear side of the power unit to a rear mount member attached to the vehicle body via a vibration isolator, and the vehicle body and the rear mount member The vehicle body and the rear mount member are respectively provided with surfaces that face each other with a predetermined gap in parallel with the generally horizontal upper and lower rear surfaces of the power unit. A stopper mounting hole having a vertical supporting surface is provided in either one of the opposing surfaces, and a mounting portion of the stopper made of an elastic body corresponding to the supporting surface is inserted into the stopper mounting hole. A stopper is attached to a surface provided with a stopper mounting hole.

Hereinafter, one embodiment of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 shows the power unit 1 viewed from the rear side. The rear side of the power unit 1 is mounted on a rear mount member 7 fixed to a vehicle body 5 via a vibration isolator 3 having a vibration isolator (not shown) installed therein.

The member 7 is provided with a stopper mounting surface 9 that faces the lower rear side of the power unit 1. This stopper mounting surface 9 is constituted by the upper surface of the rear mount member 7, which faces the lower surface of the rear side of the power unit 1 with a predetermined gap therebetween.
The stopper mounting surface 9 is substantially parallel to the lower end surface of the power unit 1 and faces the rear side of the power unit 1.

This stopper mounting surface 9 is provided with a stopper mounting hole 11 as shown in FIG. The inner circumferential edge of the stopper mounting hole 11 is bent downward and barred to form a support surface 11a on the inner circumference, and a locking end 11b is formed at the lower end.

A mounting portion 13a of the stopper 13 is inserted into the stopper mounting hole 11, and the stopper 13 is mounted on the stopper mounting surface 11 such that the stopper body 11b is exposed on the stopper mounting surface 11. The entire stopper 13 is integrally molded of rubber or the like and has elastic properties. The mounting portion 13a has a columnar shape with an outer diameter slightly larger than the inner circumferential diameter of the stopper mounting hole 11, and is provided with an enlarged portion 13c at the lower end. This enlarged portion 13c allows the mounting portion 1
An engaging surface 13d that engages with the locking end 11b of the stopper mounting hole 11 is formed around the lower end of the stopper mounting hole 11. The enlarged portion 13c is tapered downward. The upper end of the mounting portion 13a is projected onto the stopper mounting surface 9, and the upper end of the mounting portion 13a is
A stopper main body 13b is provided at the upper end of the stopper body 13b.
The lower part of the stopper body 13b is formed to hang down around the mounting part 13a with a currant 15, and the lower part 13
e is formed into a planar shape and abuts on the stopper mounting surface 9. Top surface 13 of stopper body 13b
f is formed in a planar shape and faces the lower surface of the rear side of the power unit 1.

The vehicle body 5 also includes the power unit 1.
A stopper mounting surface 17 is provided opposite to the upper surface on the rear side of the vehicle, and a stopper mounting hole 19 is provided in this stopper mounting surface 17. A mounting portion 21a of a stopper 21 is inserted into the stopper mounting hole 19, and the stopper 21 is mounted on the stopper mounting surface 17. In addition, the upper stopper mounting surface 1
7. The specific structures of the stopper mounting hole 19 and the stopper 21 are almost the same as those of the lower stopper mounting surface 9, the stopper mounting hole 11, and the stopper 13, so a detailed explanation will be omitted.

Next, the operation of the above embodiment will be explained.

First, attach the lower stopper 13 to the stopper mounting surface 9.
To attach the stopper 13 to the stopper mounting hole 11, the lower end of the enlarged part 13c of the stopper 13 is brought into contact with the stopper mounting hole 11, and the stopper 13 is press-fitted. When the enlarged part 13c of the stopper 13 passes through the support surface 11a of the stopper mounting hole 11 and is further press-fitted, the gooseberry 15 is crushed and the enlarged part 13c projects below the locking end 11b of the stopper mounting hole 11. When the pressing force on the stopper 13 is removed, the elastic force of the stopper 13 restores the gooseberry 15 as shown in FIG. .

The attachment of the upper stopper 21 is also the same as the attachment of the lower stopper 13.

In this state, there is sufficient clearance between the stoppers 13, 17 and the power unit 1, so when the power unit 1 is in a normal vibration state, the vibration isolator 3 does not come into contact with the stopper. Absorb vibrations. When the rear side of the power unit 1 bounces up and down, the upper and lower rear sides of the power unit 1 come into contact with the stopper 13 and the stopper 21, and the vertical movement is restricted. Note that the rear side of the power unit 1 hardly causes any rolling or the like, so the force applied from the power unit 1 to the stoppers 13 and 21 is mainly caused by:
It is in the above-mentioned vertical direction. however,
For example, even if a slight horizontal force is applied to the lower stopper 13, the mounting portion 13 of the stopper 13
a is supported by the support surface 11a of the stopper mounting hole 11, and the engaging surface 13d of the stopper 13 is locked to the locking end 11b of the stopper mounting hole 11, so that
The stopper 13 will not come off the stopper mounting surface 9. The same applies to the upper stopper 21. Further, in this embodiment, the stopper is attached to the vehicle body side, but the same effect can be obtained by providing a stopper attachment hole in the power unit and attaching the stopper.

This invention is not limited to the above embodiments. Stoppers 13 and 21 must have currants 15
It is not necessary to provide Stopper mounting holes 11, 19
Although the support surface 11a is formed by burring, it does not necessarily need to be formed by burring if the thickness of the member is sufficient.

As described above, in the present invention, the rear side of the power unit is mounted on a rear mount member attached to the vehicle body via a vibration isolator, and is formed within a cross section in the direction perpendicular to the axis by the vehicle body and the rear mount member. The vehicle body and the rear mount member are respectively provided with surfaces that are located in a closed space and that are substantially parallel to the upper and lower rear side substantially horizontal surfaces of the power unit and that face each other with a predetermined gap therebetween. A stopper mounting hole having a vertical supporting surface is provided in either one of the holes, and a mounting portion of the stopper made of an elastic body corresponding to the supporting surface is inserted into the stopper mounting hole, and the stopper is attached to the stopper mounting hole. Since the stopper can be installed on a surface provided with a Since it can be mounted without using a bracket or the like, sufficient stopper clearance on the rear side of the power unit can be secured, which is advantageous in terms of space and weight.

In addition to the above effects, in the above embodiment, since the stopper is provided with a currant, it becomes easy to lock the engaging surface of the stopper to the locking end of the stopper mounting hole, and the elastic modulus of the stopper is reduced. Can be made non-linear.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention.
The figure is an explanatory view of the mounted state of the power unit seen from the rear side, and FIG. 2 is an enlarged sectional view of the main parts. 1... Power unit, 3... Vibration isolator, 5...
Vehicle body, 7... Rear mount member, 9, 17...
Stopper mounting surface, 11, 19... Stopper mounting hole, 13, 21... Stopper, 13a, 21a...
...Mounting part, 100...Rear stop mechanism.

Claims (1)

[Claims] 1 The rear side of the power unit is mounted on a rear mount member attached to the vehicle body via a vibration isolator, and is located in a closed space formed by the vehicle body and the rear mount member in a cross section in the direction perpendicular to the axis. The vehicle body and the rear mount member are provided with surfaces that face each other with a predetermined gap therebetween and are substantially parallel to the upper and lower substantially horizontal surfaces of the rear side of the power unit, and one of the opposing surfaces is provided with A stopper mounting hole having a vertical support surface is provided, and a mounting portion of a stopper made of an elastic body corresponding to the support surface is inserted into the stopper mounting hole, and the stopper is attached to the surface where the stopper mounting hole is provided. A stopper mechanism for a power unit, characterized in that it is attached to a.