JPH0783269A - Elastic connecting device - Google Patents

Abstract

PURPOSE:To provide an elastic connecting device in which a process to vulcanizing adhere an insulator can be omitted as well as the weight and the cost can be reduced, the equipment cost and the number of processes can be reduced, and furthermore, the freedom of setting the spring characteristics is high, and the suitability for using as a stopper of a motive power system having an easy design and manufacture is favorable. CONSTITUTION:An outer tube 20 opened in the longitudinal direction of a car body is provided to a cross member 7, a support arm 26 opposing to both openings of the outer tube 20 is provided to the second bracket fixed to a transfer 14, and a support shaft installed coaxially in the outer tube 20 is provided to the support arm 26. While plural projections 33 to 34 abutted elastically to the upper and the lower parts, and the left and the right sides of the inner surface of the outer tube 20, and to receive the displacement of the car body in the vertical direction and the lateral direction, are provided on the outer peripheral surface; projections abutted elastically to the inner surface of the support arm 26, and to receive the displacement of the car body in the longitudinal direction, are provided at both ends, in the support shaft.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic connecting device, and more particularly to an elastic connecting device suitable for use as, for example, a power system stopper of a four-wheel drive vehicle.

[0002]

2. Description of the Related Art As a conventional power system stopper, a cylindrical insulator shown in FIG. 8 (A) and a punching type insulator shown in FIG. 8 (B) are generally used. In the cylindrical insulator, an inner cylinder a and an outer cylinder b are concentrically provided, and the inner cylinder a and the outer cylinder b are connected by a rubber d having a thinned portion c. In addition, the cut-off type insulator connects the dish-shaped small-diameter disk e and the dish-shaped large-diameter disk f with the cylindrical rubber g, and
This is a structure in which the flange portions h and i of the small-diameter disk e and the large-diameter disk f are overlapped with each other and the rubber j is provided on the flange portion h of the small-diameter disk e.

In the cylindrical insulator, the outer cylinder b is fixed to the chassis frame side and the inner cylinder a is fixed to the power system. In the kirimochi insulator, the large diameter disc f is arranged on the chassis frame side and the small diameter circle is fixed. The plate e is fixed to the power system, and the rubbers d and g receive the input from the power system (vertical direction, left-right direction and front-back direction of the vehicle body).

[0004]

As described above, since the insulator absorbs the three-dimensional movement of the vehicle body in the up-down direction, the left-right direction, and the front-rear direction by the rubber, in the cylindrical insulator, the outer cylinder and the rubber are used. It is necessary to firmly adhere to each other, and it is also necessary to firmly adhere the disk and the rubber to each other even in the sticky insulator. Therefore, in the past, both of them have been bonded by vulcanization adhesion, but it requires equipment and assembly steps for vulcanization adhesion.

Further, the cylindrical insulator has a rubber d
Requires a step of press-fitting the outer cylinder b adhered to the bracket into the bracket, which is disadvantageous in terms of weight and material cost, and the crispy insulator has a low degree of freedom in setting spring characteristics. is there.

The present invention has been made in view of the above circumstances, and an object thereof is to reduce troublesome assembling steps such as vulcanization adhesion of rubber and press-fitting, and to improve assembling workability and spring. An object of the present invention is to provide an elastic connecting device that allows easy setting of characteristics.

[0007]

Means and Actions for Solving the Problems
In order to achieve the above-mentioned object, in an elastic connecting device that elastically connects a first bracket and a second bracket through an insulator, the elastic connecting device is provided on the first bracket and intersects with its own axis. An outer cylinder having a projecting piece extending in a direction, a support arm provided on the second bracket and facing both end openings of the outer cylinder, and both ends fixed to the support arm and concentric with the inside of the outer cylinder. And a plurality of convex portions that are fitted to the support shaft and that elastically abut on the upper and lower parts and the left and right portions of the inner surface of the outer cylinder that are fitted to the support shaft, and that have both ends of the support arm. And an insulator having a protrusion interposed between the inner surface and the protrusion piece.

When assembling the present connecting device, an insulator having a convex portion on the outer peripheral surface and projecting portions at both ends is inserted into the outer cylinder provided on the first bracket, and the insulator is inserted into the second bracket. It can be assembled by fixing to. The displacement between the brackets in each direction is received by the protrusions and protrusions provided on the outer peripheral surface of the insulator.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 7 is a plan view showing a power system and a chassis frame of a four-wheel drive vehicle. The power system includes a horizontal engine 1, a transmission 2 and a transfer 3.

The chassis frame includes a side frame 4 extending in the front-rear direction of the vehicle body and a sub-frame 5 supported by the side frame 5. The sub-frame 5 includes a front cross member 6, a rear cross member 7 and both. The left and right side members 8 connecting the members 6 and 7 are formed into a substantially rectangular frame shape.

Then, a part of the engine 1 is mounted on the front cross member 6 via the mount 6a, a part of the transmission 2 is mounted on the left side member 8 via the mount 8a, and a part of the engine 1 and the transmission 2 are mounted on the rear cross member. They are mounted on the member 7 via mounts 7a, respectively, and the weight of the power system is supported by these three mounts. In the drawings, reference symbol S is a suspension arm supported by the subframe 4.

As shown in FIGS. 1 to 6, the subframe 5
The cross member 7 has a mountain shape in which the central portion projects upward so that the power to the rear wheels (not shown) is avoided from the transfer 3.
A stopper 13 as an elastic coupling device is provided on the lower side of the power transfer unit 1 by the stopper 13.
4 is fixed.

A mounting base 15 having a horizontal mounting surface 15a is fixed to the lower side of the inclined surface 12 of the cross member 7, and a first bracket 16 is provided on the lower surface of the horizontal mounting surface 15a.
Is provided. The first bracket 16 has a mounting portion 17 extending in the front-rear direction of the vehicle body, and both ends in the longitudinal direction of the mounting portion 17 are fixed to the horizontal mounting surface 15a by bolts and nuts 18.

C-shaped fixed legs 19a and 19b which are open downward are provided at an intermediate portion in the longitudinal direction of the mounting portion 17. One fixed leg 19a is longer than the other fixed leg 19b, and the outer cylinder 20 is welded and fixed between the fixed legs 19a and 19b.

The outer cylinder 20 has an elliptical shape that is long in the longitudinal direction and has openings 20a facing each other in the front-rear direction of the vehicle body. A pair of projecting pieces 21 projecting at a right angle is integrally provided, and the longer fixed leg 19a is interposed between the projecting pieces 21.

On the other hand, a second bracket 22 is fixed to the transfer 14. The second bracket 22 has a pair of bolt holes 2 through which the bolts 23 are inserted.
The mounting seat 25 having the number 4 and the U-shaped support arm 26 projecting from the mounting seat 25 are integrally provided. The support arms 26 are formed at intervals so that the outer cylinder 20 can be housed therein, and the outer cylinder 2 is provided at the tip of the support arm 26.
It has a bolt hole 27 facing the zero opening 20a.
A support shaft 28 penetrating the outer cylinder 20 is inserted into the bolt hole 27 of the support arm 26, and the support shaft 28 is fixed to the support arm 26 by tightening nuts 29 on the threaded portions at both ends. .

Further, an insulator 30 is fitted to the support shaft 28 inside the outer cylinder 20, and the first bracket 16 and the second bracket 22 are elastically coupled via the insulator 30. .

Explaining the insulator 30,
Reference numeral 31 is a pipe fitted to the support shaft 28, and an elliptical insulator body 32 made of a rubber material is vulcanized and adhered to the outer peripheral portion of the pipe 31. A plurality of triangular protrusions 33 are integrally provided on the outer circumferential portion of the insulator body 32 in the major axis direction, and these tip portions elastically contact the arc inner circumferential surface 20b of the outer cylinder 20. Two protrusions 3 are provided on one of the outer sides of the insulator body 32 in the minor axis direction.
On the other hand, one convex portion 35 is integrally provided on the other side, and these are in contact with the flat inner peripheral surface 20c of the outer cylinder 20.

Furthermore, a pair of plate-like projecting portions 36 projecting at right angles to the direction of the projecting portion 35 are provided at both ends in the axial direction of the insulator body 32, and these projecting portions 36 are the second in the assembled state. It is configured to be interposed between the inner surface of the support arm 26 of the bracket 22 and the protruding piece 21.

That is, the insulator 30 receives the vertical displacement a of the vehicle body by the convex portion 33, and the horizontal displacement b of the vehicle body by the convex portions 34 and 35. Further, the displacement c in the front-rear direction of the vehicle body is received by the protrusion 36.

Further, the stopper 1 constructed as described above
In assembling 3, the insulator main body 32 in which the pipe 30 is inserted is press-fitted into the outer cylinder 20 through the opening 20a of the outer cylinder 20 provided in the first bracket 16. In this case, the protrusions 33 to 35 provided on the outer peripheral surface of the insulator main body 32 have the insulator main body 32.
Since it is an integral rubber, it can be elastically deformed and easily press-fitted by human power, and is temporarily fixed in the press-fitted state.

Next, the pipe 3 of the insulator body 32
The support shaft 28 is inserted into the shaft 0, and the outer cylinder 20 is clamped by the pair of support arms 26. Then, after inserting both end portions of the support shaft 28 into the bolt holes 27 provided in the support arm 26 of the second bracket 22, the nuts 29 are tightened at both end portions of the support shaft 28 so that the support shaft 28 is attached to the support arm 26. When fixed, the second bracket 2
2 are connected via an insulator body 32.

The inside of the support arm 26 abuts on the projecting portion 36 projecting from the insulator body 32, and the inside of the projecting portion 36 abuts the projecting piece 21 projecting from the outer cylinder 20, so that the projecting portion 36. Is sandwiched between the projecting piece 21 and the support arm 26, which causes a large reaction force with respect to the displacement C in the vehicle longitudinal direction.

Therefore, the three-dimensional vibration transmitted from the drive system to the vehicle body while the vehicle is traveling, that is, the vertical vibration of the vehicle body is absorbed by the upper and lower convex portions 33 of the insulator body 32, and the horizontal vibration is generated. Are absorbed by the left and right protrusions 34 and 35 of the insulator body 32. Further, the displacement c in the front-rear direction of the vehicle body is
It is received by the front and rear projections 36 of 2.

Moreover, the protrusions 33 to 35 provided on the outer peripheral surface of the insulator main body 32 and the protruding portion 3 protruding from the side portion.
The spring constant can be changed by the shape of 5, the degree of freedom in setting the spring characteristics is high, and the design and manufacture are easy.

Further, in particular, the protrusion 36 of the insulator main body 32 and the outer cylinder 20 which receive the displacement in the longitudinal direction of the vehicle body.
The protruding piece 21 that is provided on the
The stopper 13 can be made compact because the stopper 13 is located corresponding to the bracket 22.

By setting the dimension between the inner surfaces of the projecting portions 36, 36 of the insulator main body 32 in the free state to be slightly smaller than the dimension between the outer surfaces of the projecting pieces 21, 21 of the outer cylinder 20, The main body 32 is the outer cylinder 20
When the second bracket 22 is assembled, the projecting portions 36 and 36 are opened in a V shape when assembled, and the projecting portion 36 is housed between the projecting piece 21 and the support arm 26 when the second bracket 22 is assembled. It is also possible to do so.

Although the stopper 13 provided between the transfer member 14 and the cross member 7 of the four-wheel drive vehicle has been described in the above embodiment, the elastic coupling device of the present invention allows the engine and the transmission to be mounted on the chassis frame. It can also be applied to mounts that support it.

[0029]

As described above, according to the present invention, the first bracket is provided with the outer cylinder, and the second bracket is provided with the support arms facing the openings of both ends of the outer cylinder. A support shaft having a fixed portion is inserted into the inside of the outer cylinder, and an insulator inserted into the outer cylinder is provided on the support shaft. In addition to having a plurality of convex portions that come into contact with each other, and since the protruding portions that are interposed between the second bracket and the outer cylinder are provided at both end portions, an outer cylinder such as a conventional cylindrical insulator becomes unnecessary, and weight, The cost can be reduced, and the process of vulcanizing and bonding the insulator can be reduced.
Equipment costs and man-hours can be reduced.

Further, the insulator has a structure in which a convex portion is formed on the outer peripheral surface and a projecting portion is formed on the side portion. The spring constant can be changed depending on the shape, and the degree of freedom in setting spring characteristics is high.
This has the effect of facilitating design and manufacture.

[Brief description of drawings]

FIG. 1 shows a stopper according to an embodiment of the present invention,
The front view seen from the rear of the vehicle body.

FIG. 2 is a side view seen from the arrow X direction in FIG.

FIG. 3 is a side view showing the first bracket of the embodiment.

FIG. 4 is a side view seen from the arrow Y direction in FIG.

FIG. 5 is an exploded perspective view of an outer cylinder and an insulator of the same embodiment.

FIG. 6 is a side view and a front view of the second bracket of the embodiment.

FIG. 7 is a plan view showing a mounted state of the power system of the four-wheel drive vehicle of the embodiment.

FIG. 8 is an explanatory diagram of a conventional cylindrical insulator and a crepe-shaped insulator.

[Explanation of symbols]

7 ... Cross member, 13 ... Stopper, 16 ... First bracket, 20 ... Outer cylinder, 22 ... Second bracket, 26 ...
Support arm, 28 ... Support shaft, 30 ... Insulator, 33 ...
35 ... convex part, 36 ... protrusion part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masateru Inoue Marugo Rubber Industry Co., Ltd. 58 Kamitomi, Kurashiki City, Okayama Prefecture

Claims (1)

[Claims] 1. An elastic connecting device for elastically connecting a first bracket and a second bracket through an insulator, wherein the elastic connecting device is provided on the first bracket and extends in a direction intersecting with an axis line of the first bracket. An outer cylinder having a projecting piece, a support arm provided on the second bracket and facing both end openings of the outer cylinder, and both ends fixed to the support arm and inserted concentrically inside the outer cylinder. A support shaft and a plurality of protrusions fitted on the support shaft and elastically abutting the upper and lower parts and the left and right portions of the inner surface of the outer cylinder are provided on the outer peripheral surface, and the inner surface of the support arm and the protrusion are provided at both ends. An elastic coupling device comprising: an insulator having a protrusion interposed between the elastic coupling device and the piece.