JPH0481311A - Fitting structure of rotary damper - Google Patents

Abstract

PURPOSE:To reduce a space occupancy ratio in the vertical direction by assembling a rotary damper to a connection part of a car body and a suspension arm through a one-way clutch, and forming this damper into a pressure side rotary damper and a stretch side rotary damper for fixation. CONSTITUTION:A rotary damper 7 is located in a connection part F of a car body 1 and a suspension arm C, At this stage, a bilateral pair of rotary shafts C1 are provided in both ends of the suspension arm C to which a wheel D and a coil spring E are fitted, and a pair of brackets R, L are arranged in two positions of the car body 1 corresponding to the rotary shaft C1. The rotary damper 7 is assembled through a one-way clutch 6 which consists of an inner wheel 6b and an outer wheel 6a to be formed into a pressure side rotary damper B and a stretch side rotary damper A. The inner wheel 6b is thereby rotated in the rotation direction that the one-way clutch is engaged, and simultaneously, a rotary shaft 12 of the rotary damper 7 is rotated to generate the resistant force against the work of the suspension arm C.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention uses a rotating damper to
This invention relates to a mounting structure for a rotary damper that allows the damping force characteristics to be changed even in terms of pressure (1) and reduces the space in the vertical direction of the damper in the engine room or trunk room.

[Conventional technology]

As shown in FIG. 4, a conventional shock absorber used in a vehicle such as an automobile is a cylindrical shock absorber a in which a piston rod expands and contracts in the axial direction by utilizing the fluid resistance of hydraulic oil. The vehicle body is suspended between the two.

In this cylindrical shock absorber a, the internal hydraulic oil of the damper moves as the tire C moves up and down, and a damping force is generated by the fluid resistance during the movement [Problem to be solved by the invention] ] However, in the conventional technology, the damper is cylindrical and expands and contracts in the axial direction, so it requires space in the vertical direction of the vehicle, resulting in a problem in that it takes up a lot of space in the engine room and trunk room. There is.

Further, since the rotary damper cannot change the resistance force depending on the direction of rotation, there is a problem that the damping force cannot be changed in the direction of extension and compression of the suspension.

The present invention was devised in view of the problems of the above-mentioned conventional techniques, and aims to provide a rotary damper mounting structure that occupies a small vertical space in a trunk room or an engine room.

[Means to solve the problem]

In order to achieve the above object, the rotary damper mounting structure of the present invention has a casing in which a large number of fixed plates are arranged in parallel in the circumferential direction, and a large number of rotary dampers corresponding to the fixed plates are installed inside the casing. A plate is arranged with rotating shafts arranged parallel to every other plate on the fixed plate,
In the mounting structure for a rotary damper in which the casing is filled with viscous fluid, the rotary damper is installed at a connecting portion between the body of the vehicle and the suspension arm, and the rotary damper is installed at the connection portion between the body of the vehicle and the suspension arm, and the rotary damper is provided at both ends of the suspension arm on the same axis. A pair of rotating shafts are provided on the left and right sides, a pair of mutually parallel brackets are arranged at two locations on the vehicle body corresponding to the rotating shafts, and clutches are driven in opposite directions to the left and right rotating shafts. The rotary damper is assembled via a one-way clutch set as above, and is formed and attached to a compression side rotary damper and a rebound side rotary damper.

[For production]

When the suspension arm moves upward, the one-way clutch on the compression side is engaged, the rotation damper on the compression side rotates, and the damping effect is activated.

At this time, the one-way clutch on the rebound side is not engaged, and the rotation damper on the rebound side does not rotate.

Conversely, when the suspension arm moves downward, the one-way clutch on the rebound side is engaged, the rotation damper on the rebound side rotates, and the damping effect is activated.

At this time, the one-way clutch on the pressure side is not engaged, and the rotation damper on the pressure side does not rotate.

Further, it is possible to arbitrarily set the damping force of the rotary damper, and to arbitrarily set the damping force characteristics in the extension and compression directions.

[Embodiment] First, FIGS. 1 to 3 relate to an embodiment of the present invention.

The rotary damper 7 used in the present invention is a viscous resistance rotary damper that utilizes shear resistance of viscous fluid, but a damper that utilizes frictional resistance may also be used.
A large number of fixed plates 14 are arranged in parallel in the circumferential direction in a casing 11 having a flange lla at the base, and a large number of rotary plates 15 are arranged in correspondence with the fixed plates 14.
Rotating shafts 12 are arranged parallel to every other shaft, and the lid plate 1
It is closed at 3.

Further, the rotating shaft 12 is fixed to the inner ring 6b of the one-way clutch 6 with a key 8 through the casing 11, and the rotating shaft 12 is connected to the cover plate 13 and the casing 1.
1 and rotatably supported by bearings 17 and 18, and an oil seal 19 is disposed between the casing 11 and the rotating shaft 12. Further, the casing 11 is filled with a viscous fluid 16.

The present invention utilizes the rotary damper 7 to
A rotary damper 7 is installed at the connection iF between the suspension arm C and the suspension arm C.

A pair of left and right rotation axes C1, C1 are provided on the same axis at both ends of the suspension arm C10 to which the wheel D and the coil spring E are attached.
A pair of mutually parallel contract brackets R and L for supporting the suspension C are disposed on the vehicle body 1 connected to the vehicle body 1 at two locations corresponding to the rotation axis C1.

In addition, the left and right rotation axes C1, C1 are provided with an inner ring 6a and an outer ring 6, which are set so that clutches are driven in mutually opposite directions.
A rotary damper 7 is assembled via a one-way clutch 6 composed of a k combination, and is formed into a compression side rotary damper B and a rebound side rotary damper A.

The one-way clutch 6 regulates the direction of rotation, and can transmit rotation in that direction, but operates as a bearing and does not transmit rotation in the opposite direction.

Furthermore, the mounting condition will be explained in detail with reference to FIG.

A body 1 of the vehicle body is provided with only a first bracket R and a second bracket in which a hole L1 into which a one-way clutch 6 is fitted is cut in parallel with the first bracket R, in a direction substantially horizontal to the vehicle body.

A mounting bolt 4 and a mounting nut 5 are attached to the first bracket R through a bush 3 in the shaft hole 2 of the suspension arm C.
The bolt 4 serves as a fulcrum for the rotating shaft C1.

Further, a rotary damper 7 is arranged on one side of the second bracket C, and the flange lla of the casing 11 is fixed to the bracket C by bolts 9.

Further, a one-way clutch 6 is disposed between the rotation shaft C1 of the first bracket R and the second bracket L, and an inner ring 6b of the one-way clutch 6 is fixed to the rotation shaft 12 of the rotation damper 6 with a key 8. The outer ring 6a is fixed to the outside of the shaft hole 2 with bolt 10. If the suspension arm C swings up and down, use bolt 4.
In order to swing around the fulcrum, the suspension arm C
The outer ring 6a fixed with bolts 10 rotates.

Further, in the rotational direction in which the clutch of the one-way clutch 6 is engaged, the inner ring 6b also rotates, and at the same time, the rotating shaft 12 of the rotary damper 7 also rotates, generating a resistance force against the movement of the suspension C.

Conversely, in the rotational direction in which the clutch of the one-way clutch 6 is not engaged, the one-way clutch 6 acts as a bearing, so it does not transmit rotational force to the inner ring 6b, and the rotational damper 7
The rotation axis C1 does not rotate and does not generate any resistance against the movement of the suspension C.

〔Effect of the invention〕

Since the present invention is configured as described above, it produces the effects described below.

Conventionally, it was not possible to change the damping force characteristics in the extension direction and pressure surface using a shock absorber alone, but in the present invention, the connection between the suspension and the body uses a one-way clutch that is set so that the clutches drive in opposite directions. Since the rotary damper is attached through the suspension and is formed into a rebound rotary damper and a compression rotary damper, damping force characteristics can be applied to the suspension's extension direction (downward) and pressure surface (upward). A damping effect can be exerted in each direction.

In addition, since the rotary damper can be placed in the same direction as the rotation axis of the suspension, it occupies less space on the vehicle body.
Does not interfere with the engine room or trunk room.

In addition, since the rotary damper is installed on the rotation axis of the suspension via a one-way clutch, the damping effect is applied by the rotational force of the rotary damper against the vertical movement of the suspension, and the damping force characteristics in the extension direction and pressure surface are can be set independently.

Furthermore, the invention is not limited to viscous resistance rotary dampers, but can also be applied to dampers whose resistance force cannot be changed depending on the direction of rotation, such as frictional resistance dampers.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the rotary damper mounting structure, FIG. 2 is a perspective view of the rotary damper in an installed state, FIG. 3 is a detailed internal view, and FIG. 4 is an explanatory diagram of a conventional example.

Claims (1)

[Claims] Inside the casing, a large number of fixed plates are arranged in parallel in the circumferential direction, and a large number of rotating plates are arranged in correspondence with the fixed plates, and a rotating shaft is arranged in parallel with every other fixed plate. death,
In the mounting structure for a rotary damper in which the casing is filled with viscous fluid, the rotary damper is installed at a connecting portion between the body of the vehicle and the suspension arm, and the rotary damper is installed at the connection portion between the body of the vehicle and the suspension arm, and the rotary damper is installed at both ends of the suspension arm on the same axis. A pair of rotation shafts are provided on the left and right sides, a pair of mutually parallel brackets are arranged at two locations on the vehicle body corresponding to the rotation shafts, and clutches are driven in opposite directions to the left and right rotation shafts. A rotary damper mounting structure characterized in that a rotary damper is assembled via a one-way clutch set as follows, and is formed and attached to a compression side rotary damper and a rebound side rotary damper.