JPH0415581Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention relates to a shock absorbing spring support structure for a rear wheel suspension system in an automobile, and in particular, to distribute the input from the shock spring so that it is not directly transmitted to the floor, and to distribute it to the vehicle body side. This invention relates to a support structure for a buffer spring that enables transmission.

[Conventional technology]

In general, a rear wheel suspension system for an automobile is constructed by disposing a shock absorber and a shock spring between a suspension arm that is swingably supported by the vehicle body and rotatably supports the rear wheel, and the vehicle body. There is. As a support structure for such a buffer spring, there is a conventional structure shown in FIG. 4, for example.

In the figure, reference numeral 21 indicates a floor of the luggage compartment, and a rear wheel house 22 consisting of an inner panel 22a and an outer panel 22b is formed on the left and right sides of the floor 21. This rear wheel house 2
A rear wheel 23 is disposed inside the rear wheel 23.
is rotatably supported by a suspension arm 24 which is swingably supported by the vehicle body. In addition, the inner panel 22 on the lower surface of the cargo compartment floor 21
A rear side member 25 serving as a floor reinforcing member is arranged and fixed inwardly from a, and a spring support portion 25a made of a separate member is fixed approximately at the center of the rear side member 25 in the longitudinal direction of the vehicle. The spring support portion 25a is formed into a substantially bottomed cylindrical shape, and an adhesive 25b is applied to the lower surface of the cargo floor 21.
It is fixed with adhesive. A spring seat 26 is disposed within the spring support portion 25a, and a buffer spring 27 is disposed between the spring seat 26 and the suspension arm 24. The upper end is supported by the vehicle body.

[Problem that the invention attempts to solve]

In the conventional buffer spring support structure described above, since the spring support section 25a is directly connected to the luggage compartment floor 21, the input from the buffer spring 27 is transmitted to the spring support section 25a.
a and is directly transmitted to the luggage compartment floor 21. Therefore, if the spring support part 25a and the luggage compartment floor 21 are connected by spot welding, there is a risk of spot cracks, etc.
As mentioned above, they are connected with adhesive,
Therefore, the adhesive is required, and the number of man-hours for applying the adhesive increases, resulting in a problem of lower productivity. Furthermore, since the input is directly transmitted to the luggage compartment floor 21 as described above, it is also disadvantageous in terms of vibration and noise.

Further, the spring support portion 25a needs to be drawn quite deeply so that it comes into contact with the lower surface of the luggage compartment floor 21 from the lower surface of the rear side member 25 in the drawing.
Therefore, it is difficult to mold the spring support portion 25a integrally with the rear side member 25, and it is necessary to mold the spring support portion 25a separately as described above, which also reduces productivity.

In view of the above-mentioned conventional problems, the purpose of the present invention is to provide an automotive rear panel that can solve problems such as spot cracking, vibration, and noise by preventing the input from the buffer spring from being directly transmitted to the luggage compartment floor. The present invention provides a buffer spring support structure for a wheel suspension system.

[Means for solving problems]

The present invention provides a buffer spring support structure for a rear wheel suspension system for an automobile in which the upper end of the buffer spring is supported by a spring support part formed between a rear wheel house and a floor reinforcing member on the lower surface of a cargo compartment floor. , a buffer space is formed between the spring support part and the luggage compartment floor, a buffer plate is arranged in the buffer space, and the buffer plate is arranged on an inclined surface that slopes from the luggage compartment floor side to the spring support part side. curved downward to have
The bottom surface of the curved part is brought into contact with and fixed to the spring support part, the outer end of the buffer plate is fixed to the rear wheel house, and the inner end is fixed to the floor reinforcing member. There is.

[Effect]

According to the buffer spring support structure according to the present invention, a curved buffer plate having an inclined surface is disposed in the buffer space between the luggage compartment floor and the spring support part, and both ends of the buffer plate are connected to each other. Since it is connected to the highly rigid rear wheel house and floor reinforcing member, the input from the buffer spring is distributed to the rear wheel house and floor reinforcing member while being relaxed by the elastic deformation of the buffer plate, and then transmitted through both members. This will be transmitted to the vehicle body. Therefore, there is no problem of spot cracking as in the past, and no adhesive is required to connect the spring support part and the buffer plate, and the buffer plate and the rear wheel house, and the floor reinforcing member, which increases productivity. In addition to improving vibration and noise, problems such as vibration and noise can also be solved.

In addition, since a buffer plate is placed between the spring support part and the luggage compartment floor, the amount of drawing for the spring support part can be reduced, making it possible to integrally mold it with the floor reinforcing member. You can improve your sexuality.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 3 are diagrams for explaining a buffer spring support structure for a rear wheel suspension system for an automobile according to an embodiment of the present invention. In the figure, 1 is a luggage compartment formed at the rear end of the vehicle body, and left and right rear wheel houses 3 are disposed on the left and right sides of the luggage compartment floor 2 of the luggage compartment 1. 3 is an inner panel 3a formed to bulge inward of the luggage compartment 1;
The outer panel 3b is formed to bulge outward from the vehicle interior. Note that 3c in FIG. 1 is a reinforcing bracket for supporting the upper end mounting portion of the shock absorber (not shown). Although not shown, a rear wheel is disposed inside the rear wheel house 3.
The rear wheel is rotatably supported by an axle fixed to the tip of a suspension arm that is approximately A-shaped in plan view, and the suspension arm is swingably supported by the vehicle body (Fig. 4). reference).

Further, a rear side member 4 as a reinforcing member is arranged and fixed on the lower surface of the cargo compartment floor 2, and the member 4 is formed so as to surround the inner panel 3a of the rear wheel house 3. In the middle of this rear side member 4, there is a spring support part 4a.
is recessed, and there is a predetermined space between the spring support portion 4a and the luggage compartment floor 2, which serves as a buffer space a. Further, a spring sheet 5 is arranged and fixed in the spring support portion 4a, and the spring sheet 5 has a hat-like cross section.
The upper end 6a of the buffer spring 6 is fitted into the spring sheet 5.

The spring support portion 4a and the luggage compartment floor 2
A buffer plate 7, which is a feature of this embodiment, is arranged between the two. This buffer plate 7 has outer flange portions 7 that are substantially perpendicular to the left and right ends in FIG. 2 of the base portion 7a, respectively.
b, a curved portion 7d which is integrally formed with a substantially horizontal inner flange portion 7c and is bent downward at the front and rear;
7e are integrally formed. The left and right ends of each of the curved portions 7d and 7e in FIG. 2 are located on the floor 2.
An inclined surface 7 inclined from the side toward the spring support portion 4a side.
f. The outer flange portion 7b is between the inner panel 3a and the flange portion 2a bent upward on the periphery of the cargo floor 2, and the inner flange portion 7c is between the lower surface of the cargo floor 2 and the rear side member 4. They are respectively inserted between the flange portions 4b and fixed by spot welding. In addition, the front and rear curved portions 7d and 7e
The bottom surfaces of the spring support portions 4a are in contact with each other and fixed by spot welding, and in this way, the base portion 7a is formed between the luggage compartment floor 2 and the spring support portion 4a. The above-mentioned buffer space a is divided into upper and lower sections.

Next, the effects of this embodiment will be explained.

Impact loads due to unevenness of the road surface are absorbed by the buffer spring 6 and input to the spring support portion 4a, but in the conventional buffer spring support structure, the impact load is directly transmitted from the input spring support portion to the luggage compartment floor. However, there were problems such as spot cracking. In contrast, in this embodiment, a buffer space a is provided between the spring support part 4a that supports the spring seat 5 and the luggage compartment floor 2, and a buffer plate 7 is provided within the space a.
The outer and inner flange portions 7b and 7c of the buffer plate 7 are connected to the inner panel 3a of the rear wheel house 3, respectively.
Connected to the rear side member 4 and provided with the buffer space a
The base part 7a is divided into upper and lower parts, and the curved part 7
Since the sections d and 7e are secured as they are, the input from the buffer spring 6 is relaxed by the elastic deformation of the buffer plate 7 itself, and is distributed from the buffer plate 7 to the highly rigid rear wheel house 3 and rear side member 4. It is transmitted evenly over a wide area of the car body. Therefore, the above input is not directly transmitted to the luggage compartment floor as in the past, and as a result, the problem of spot cracking does not occur, so direct spot welding can be performed without using adhesives as in the past. It can be fixed and productivity can be improved accordingly. Furthermore, since the input is dispersed and transmitted to the vehicle body in this way, problems with vibration and noise rarely occur.

In addition, since the buffer plate 7 is arranged between the spring support part 4a and the luggage compartment floor 2, and a buffer space is provided, the amount of drawing of the spring support part 4a is small, so that the spring The support portion 4a can be molded integrally with the rear side member 4, and there is no need for a separate structure as in the case of the conventional structure, and from this point of view as well, productivity can be improved.

[Effect of idea]

As described above, according to the buffer spring support structure for a rear wheel suspension system for an automobile according to the present invention, a curved buffer plate having an inclined surface is disposed within the buffer space between the spring support part and the luggage compartment floor. At the same time, the outer and inner ends of the buffer plate are connected to the rear wheel house and the floor reinforcing member, respectively, so that the input from the buffer spring is relaxed and dispersed to the highly rigid rear wheel house and floor reinforcing member, thereby strengthening the vehicle body. This makes it possible to improve productivity by eliminating the need for adhesives to connect the spring support to the luggage compartment floor, and has the effect of reducing vibration and noise.

[Brief explanation of drawings]

1 to 3 are diagrams for explaining a buffer spring support structure according to an embodiment of the present invention, in which FIG. 1 is a sectional front view thereof, FIG. 2 is a perspective view of the buffer plate, and FIG. The figure is a perspective view thereof, and FIG. 4 is a sectional front view of a conventional buffer spring support structure. In the figure, 1 is a luggage compartment, 2 is a floor, 3 is a rear wheel house, 4 is a floor reinforcing member (rear side member), 4a is a spring support part, 6 is a buffer spring, and 7
7b and 7c are outer and inner flange portions (outer and inner end portions), and 7d and 7e are front and rear curved portions.

Claims (1)

[Scope of utility model registration request] Rear wheel houses are formed on the left and right sides of the cargo compartment, a floor reinforcing member extending inwardly from the rear wheel house on the lower surface of the cargo compartment floor in the longitudinal direction of the vehicle body is fixed, and a spring support portion is formed on the floor reinforcing member. , a buffer spring support structure for a rear wheel suspension system for an automobile in which the upper end of a buffer spring is supported by the spring support part, and a buffer space is provided between the spring support part and the luggage compartment floor; A buffer plate is arranged in the buffer space, and the buffer plate is curved downward so as to have an inclined surface that slopes from the luggage compartment floor side to the spring support part side, and the bottom surface of the curved part is placed above the spring support part. A buffer spring support for a rear wheel suspension system for an automobile, characterized in that the outer end of the buffer plate is fixed to the rear wheel house, and the inner end of the buffer plate is fixed to the floor reinforcing member. structure.