JPH038788Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a vibration isolation structure for a back door in an automobile having a back door.

Conventionally, the vibration isolation structure used for backdoors consists of stoppers attached to the left and right side walls of the backdoor, stoppers attached to the car body, and cushions attached to the car body. The stopper and the cushion are in surface contact to restrict only the vertical vibration of the backdoor. This is because conventional backdoors are small in size (and therefore in mass), so lateral vibrations have not been much of a problem. However, in recent years, back doors have tended to become larger, so that not only vertical vibrations but also lateral vibrations of the back doors have become a problem.

The purpose of this invention is to provide a structure that effectively prevents vertical and horizontal vibrations of the back door.

This invention will be explained below based on drawings showing embodiments. 1 to 4, a stopper 3 made of hard synthetic resin, shown in detail in FIG. 3, is attached to an outer surface 2a of a side wall 2 of a back door 1 of an automobile with bolts 4 and nuts 5. 4a, 5
a is a washer. The stopper 3 is provided with a groove 3a as shown in FIG. The groove 3a is the side wall 3
b.3b, the rear wall 3c, and the floor wall 3d, and the front facing the rear wall 3c is open. A bolt hole 3e is provided in the rear wall 3c, into which the aforementioned bolt 4 is inserted. Both side walls 3b
and the front end of the floor wall 3d are respectively contact surfaces 3
f, 3f and contact surface 3g, and contact surface 3
f, 3f and the contact surface 3g intersect at an obtuse angle close to a right angle. Note that 6, 7 and 8 represent the panel, glass and weather strip of the back door 1, respectively.

Reference numeral 9 indicates the rear body of the automobile in which the back door 1 is accommodated when closed. A rubber cushion 14 is attached to the side wall 9a of the rear body by washers 10, 11, bolts 12, and nuts 13, and has contact surfaces 14a, 14a on both sides that are in surface contact with the contact surfaces 3f, 3f of the stopper 3 when the back door 1 is closed. , a contact surface 14 in surface contact with the contact surface 3g of the stopper 3 is provided in the intermediate portion thereof.
It has b. As is clear from FIG. 4, each contact surface 14a, 14 in the cushion 14
Grooves 14c and 14d are formed approximately in the center of b. These grooves 14c and 14d enhance the cushioning properties (flexibility) of the cushion 14 at the respective contact surfaces 14a and 14b.

Note that the cushion 14 is provided with bolt holes 14e, 14e below the contact surface 14a,
The bolt 12 is inserted into the bolt holes 14e, 14e.

The stopper 3 is attached to the left and right side walls 2 of the back door 1, and the cushion 14 is attached to the left and right side walls 9a of the rear body 9.

With the above structure, when the backdoor 1 is closed, the contact surfaces 3f and 3g of the stopper 3 contact the contact surfaces 14a and 14b of the cushion 14, respectively. As can be seen from FIG. 2, the contact surfaces 3g and 14b are substantially horizontal, so they restrict vertical movement of the back door 1, and since the cushion 14 is made of rubber, it absorbs vibrations of the back door 1 in the vertical direction. On the other hand, contact surfaces 3f and 14a are contact surfaces 3
It intersects g and 14b at an obtuse angle close to a right angle, so it is almost perpendicular. Therefore, the contact surface 3f,1
4a regulates the left and right movement of the back door 1, and the cushion 14 absorbs vibrations of the back door 1 in the left and right direction.

In the above embodiment, the stopper 3 is provided on the side wall 2 of the back door 1, and the cushion 14 is provided on the side wall 9a of the rear body 9, but conversely, the cushion is provided on the side wall 2 of the back door 1, and the stopper is provided on the side wall 9a of the rear body 9. The stopper and the cushion may be provided with contact surfaces that restrict vertical and horizontal movement of the back door 1 when the back door 1 is closed.

FIG. 5 shows a second embodiment of this invention. In the second embodiment, the side surface 2a of the side wall 2 of the back door 1 is
This is an example in which a part of the cushion 14 is formed as a stopper 15 for the cushion 14, thereby simplifying the configuration shown in FIG.

As described above, according to the present invention, a cushion that has two types of contact surfaces and is made of a single member can buffer the impact when the back door is closed, and also restrict the movement of the back door in the vertical and horizontal directions of the vehicle. Therefore, the structure can be simplified and the manufacturing cost can be reduced.

In particular, the present invention improves the cushioning properties of each contact surface of the cushion, which not only improves the cushioning function, but also easily absorbs errors in the accuracy of assembling the back door to the automobile body. This improves the appearance when the back door is closed.

[Brief explanation of the drawing]

FIG. 1 shows a perspective view of the rear left side of an automobile having a back door, looking toward the front right. FIG. 2 shows a first embodiment of this invention and is a sectional view taken along the line -- in FIG. 1. 3 shows a perspective view of the stopper, FIG. 4 shows a perspective view of the cushion, and FIG. 5 shows a second embodiment of the invention, corresponding to FIG. 1... Back door, 2... Side wall, 3... Stopper, 3f, 3g... Contact surface, 9... Rear body (body), 14... Cushion, 14a, 14b
...Contact surface, 15...stopper.

Claims (1)

[Scope of utility model registration request] A stopper is provided on one side of the side wall of the back door and a side wall of the automobile body, and a cushion is attached to the other side, and each of the stopper and the cushion comes into contact with each other when the back door is closed and stops the back door in the vertical direction of the automobile. The cushion has a contact surface that restricts the movement of the cushion, and a contact surface that also restricts the movement of the backdoor in the left-right direction of the car.Moreover, each contact surface of the cushion has a groove formed approximately in the center of each contact surface, and a groove is formed in the approximate center of each contact surface. An anti-vibration structure for an automobile back door characterized by enhanced cushioning properties at the surface.