JPS6224050A - Chassis supporting structure for car - Google Patents

Abstract

PURPOSE:To install a vibrationproof member with high precision by dividing the vibrationproof member into the upper and lower parts midway in the vertical direction and fastening the divided upper and lower inner cylinders onto one side among a frame and a chassis and nipping the divided upper and lower outer cylinders onto the other side among the frame and the chassis. CONSTITUTION:A vibrationproof member 8 is divided into the upper and lower parts midway in the intermediate part in the vertical direction. The upper edge part of a lower-part inner cylinder 11b is fitted onto the lower edge part of an upper-part inner cylinder 11a which is formed by dividing an inner cylinder, and the both of the upper and lower inner cylinders 11a and 11b are fastened onto a chassis 9 by a fastening member 15. While, the upper-part outer cylinder 12a and a lower-part outer cylinder 12b which are formed by dividing the outer cylinder 12 nip the opened port edge of the through-hole 2a of a frame 2 by the fastening of the inner cylinder 11 with the chassis 9, and the upper and lower outer cylinders 12a and 12b can be supported onto the frame 2.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of application in the LC industry) This invention relates to a vehicle body support structure for an automobile that elastically supports a vehicle body on a frame.

(Prior Art) In an automobile, wheels and an engine are mounted on a frame, and the vehicle body is also supported. This frame vibrates while the automobile is running, but in order to prevent the vibrations of the frame from being directly transmitted to the vehicle body, the vehicle body is elastically supported by the frame via a plurality of vibration isolating members.

In the above configuration, in order to more effectively suppress vibration transmission in the downward direction from the frame to the vehicle body and improve ride comfort, a new type of anti-slip spring with a smaller spring constant in the vertical direction is used as shown in Figure 3. A vibrating member may be used.

In the figure, 31 is the frame of the car, 32 is the car body,
This vehicle body 32 is elastically supported by a frame 3I via a vibration isolating member 33. The vibration isolating member 33 includes an inner cylinder 34 whose axis is vertically oriented, an outer cylinder 35 externally fitted on the inner cylinder 34 on the same axis, and an outer cylinder 35 that is interposed between the inner cylinder 34 and the outer cylinder 35. It is composed of an elastic member 36 such as rubber that is adhered to both.

The inner cylinder 34 is fastened to the vehicle body 32 by a bolt 38 inserted therein. On the other hand, a bracket plate 39 is provided protruding from the outer surface of the outer 035, and the bracket plate 39 is fastened to the frame 31 with bolts 40, whereby the outer cylinder 35 is supported by the frame 31.

(Problems to be Solved by the Invention) By the way, in the above-described type of vibration isolating member 33, a relatively large force is required to elastically deform the elastic member 36 in the water direction f. Therefore, the inner cylinder 3 relative to the upper body 32
4 and the mounting position of the outer cylinder 35 relative to the frame 31, and if this error is to be absorbed by elastic deformation of the elastic member 36, the elastic member 36 A large external force is required in the horizontal direction to deform the structure, so it is not easy to absorb such errors.

Therefore, it is required to prevent large errors from occurring in the horizontal direction between the mounting positions of the inner cylinder 34 and the outer cylinder 35 on the same dirt floor. becomes complicated.

(Object of the Invention) This invention has been made in consideration of the above-mentioned circumstances. The purpose is to facilitate the highly accurate attachment of components.

(Structure of the Invention) A feature of the present invention for achieving the above object is that the vibration isolating member is divided into 1-lower parts in the middle in the vertical direction, and the divided upper and lower inner cylinders are placed between the frame and the vehicle body. The two outer cylinders, which are fastened together on one side and separated as above, are located at the point where the frame and the other side of the vehicle body are sandwiched.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Reference numeral 1 denotes an automobile, and a front wheel 4 is supported at the front of the frame 2 via a leaf spring type suspension 213, and a leaf spring type suspension 6 is supported at the rear of the same frame 2. The rear wheel 7 is supported via. Although not shown in the drawings, the frame 2 supports an engine.

“Two-part frame 2”
1 [Body 9 is supported. Vibrations of the frame 2 while the automobile 1 is running are absorbed by these vibration isolating members 8, and vibration transmission to the vehicle body 9 is suppressed.

” To explain the two-part vibration isolating member 8, each of these vibration isolating members 8 consists of an inner cylinder 11 whose axis is vertically oriented, an outer cylinder 12 that is externally fitted approximately coaxially with this inner cylinder 11, and these inner cylinders. 11 and a cylindrical rubber elastic member 13 interposed between the outer cylinder 12 and the inner cylinder 11, the elastic member 13, and the outer cylinder 1.
The two parts are each vulcanized and bonded to the b-type member 13.

The inner cylinder 11 is fastened to the vehicle body 9 by a fastening member 15. This one fastening member 15 is composed of a bolt 16 that passes through the vehicle body 9 and is inserted into the inner cylinder 11, and a nut 17 that is screwed onto the end of the bolt 16 protruding from the inner cylinder 11.

Further, a through hole 2a is formed in the frame 2, and an inner cylinder 11 passes through this through hole 2a.

The vibration isolating member 8 is divided into upper and lower parts halfway in the vertical direction. Then, the -L end of the lower inner cylinder flb is fitted into the lower end of the two-part inner cylinder Lla formed by dividing the inner cylinder 11, and both the upper and lower inner cylinders 11a and llb are connected to the vehicle body by the fastening member 15. Both were designated 1VI in 9. In this case, a protrusion 13a' that protrudes toward the lower elastic member 13b is integrally formed on the lower surface of the upper elastic member 13a formed by dividing the two-part elastic member 13. This protrusion 13a' is formed by the through hole 2a of the frame 2.
The protruding end thereof is in contact with the surface of the lower elastic member 13b.

On the other hand, by fastening the inner cylinder 11 to the vehicle body 9, the outer cylinder 1
Upper outer cylinder 12a and lower outer cylinder 1 formed by dividing into 2
2b sandwich the opening edge of the through hole 2a of the frame 2,
As a result, both the upper and lower outer cylinders 12a, 12b are connected to the frame 2.
Supported by

In the above configuration, when the frame 2 vibrates in the water direction, the inner tube 11 and the outer tube 12 are relatively displaced in the horizontal direction with elastic deformation of the outer member 13. At this time, the protrusion 13a' of the upper i outer member 13a elastically contacts the inner peripheral surface of the through hole 2a of the frame 2, and the transmission of the vibration of the frame 2 to the vehicle body 9 is suppressed.

Further, the vertical vibration of the frame 2 is caused by both the upper and lower elastic members 13a whose spring constants are smaller in the vertical direction.

13b, and transmission of the vibration in the vertical direction to the vehicle body 9 is effectively suppressed.

In the case of the northern part, the upper elastic member 13a and the lower elastic member 1
3b, so both upper and lower elastic members 1
By providing each of 3a and 13b with a desired spring constant, a desired riding comfort can be obtained.

In the above embodiment, the inner cylinder 11 is fastened to the vehicle body 9,
Although the outer cylinder 2 is supported by the frame 2, the inner cylinder 11 may be fastened to the frame 2 and the outer cylinder 12 may be supported by the vehicle body 9 instead.

(Effects of the Invention) According to the present invention, the vibration isolating member composed of the inner and outer cylinder retainers and the outer member is divided into 11 L parts at the midway point in the 7F direction,
The two inner cylinders were tightened together to one side of the frame and the car body, and the two outer cylinders, which had been split as above, pinched the other side of the frame and car body, so they were split. -1
- Fasten the lower inner cylinder to one side of the two-part frame and the car body by tightening them I7, and with this tightening, the upper and lower outer cylinders are attached to the frame or car body by pinching the other side to the above-mentioned mountain side. The installation of the vibration isolating member is now complete. In this case, the outer cylinder moves to follow the mounting position of the inner cylinder, and at that position, it pinches the other side of L (=
Since the outer cylinder can be rotated, alignment of the outer cylinder with respect to the inner cylinder is automatically performed by tightening the inner cylinder.

Therefore, it is possible to easily attach the vibration isolating member to the frame or the vehicle body with high precision.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, FIG. 1 is a sectional view taken along the line II in FIG. 2, FIG. 2 is an overall side view of the automobile, and FIG. 3 is a conventional example. 2 is a diagram corresponding to FIG. 1. ■...Automobile, 2.Fist frame, 8.Φ vibration isolation member, 9.
・Vehicle body, 11・Inner cylinder, 1la-Φ upper inner cylinder, llb・
・Lower inner tube, 12・・Outer tube, 12a-・Upper outer tube, 12
b-・Lower outer cylinder, 13・φri external material, 15・・Fastening member. Patent applicant Daihatsu Motor Co., Ltd. Figure 2

Claims (1)

[Claims] 1. The vibration isolating member interposed between the frame and the vehicle body is composed of an inner cylinder whose axis is vertically oriented, an outer cylinder fitted onto the outer cylinder approximately coaxially with the inner cylinder, and the inner cylinder and the outer cylinder. an elastic member interposed between them and adhered to both, the inner cylinder is fastened to one side of the frame and the car body by a fastening member, and the outer cylinder is fastened to the other side of the frame and the car body. In the vehicle body support structure of the automobile to be supported, the above-mentioned vibration isolating member is divided into upper and lower parts at the midpoint in the vertical direction, and both the divided upper and lower inner cylinders are jointly fastened to the above-mentioned one side of the frame and the vehicle body. A vehicle body support structure for an automobile, characterized in that both outer cylinders sandwich the other side.