JPH03199731A - Roll damper device - Google Patents

Abstract

PURPOSE:To display predetermined damping force by fluidization resistance of a circulating path, at the time of generating vibration caused by a roll when a quick turn is performed, by providing a seal member in the point end part of a partitioning plate and limiting a movement of fluid to the circulating path. CONSTITUTION:In the case of generating vibration, in which left and right wheels 1 are vertically moved in a reverse direction to each other, caused by a roll when a quick turn of a car body is performed, damping action is displayed by fluidization resistance, caused by fluid in a fluid chamber 19 to pass through a circulating path 21, when relative rotation is performed between a rotary shaft 10 and an outer cylinder 14 of a roll damper device 9, by respectively displacing arm parts 7b of rods 7A, 7B and rotation-displacing left and right shaft parts 7a in a reverse direction to each other. An internal pressure in the fluid chamber 19, is increased to cause the fluid to flow into a space part 25, resulting in sliding of a cap member 24 to a point end part by the pressure of the fluid, so that a part between the first partitioning plate 17 and the outer cylinder 14 is sealed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a roll damper device used in an automobile suspension.

[Conventional technology]

Conventionally, as shown in Japanese Patent Publication No. 58-20805, a suspension system for a vehicle has conventionally installed a damper for suppressing the vertical vibration of each wheel, and connected the left and right wheel support members with a stabilizer. A device is known that uses a spring force to suppress roll during sharp turns. This conventional device uses the damper to relieve the movement of the stabilizer and suppress the shaking of the vehicle body when bumps and rebounds occur during normal driving conditions, and also uses the braking force of the damper to prevent rolls during sharp turns. The stabilizer is configured to restrain the movement of the stabilizer and suppress the roll of the vehicle body, but since the damper's damping force does not act sufficiently during the roll, it takes time to dampen the vibration caused by this roll. There is a problem that it takes.

For this reason, a roll damper device equipped with damping means such as a rotary damper as shown in Japanese Patent Application Laid-Open No. 62-80319 is attached to the stabilizer, and its damping force reduces vibrations caused by the roll during sharp turns. It is thought to suppress the

[Problem to be solved by the invention]

The roll damper device consisting of the rotary damper includes a cylindrical casing, a rotating shaft rotatably supported by the casing, a movable vane protruding from the rotating shaft, and a movable vane inside the casing. The interior of the casing is divided into a plurality of fluid chambers by a partition member protruding from the peripheral surface, and due to the flow resistance when the fluid sealed in the fluid chamber passes through the flow path provided in the partition member. , is configured to suppress rotation of the rotating shaft and damp vibration caused by the roll. In a roll damper device that is configured to generate a damping force in accordance with the flow resistance of the fluid passing through the flow path, the fluid in the fluid chamber moves through a portion other than the flow path, causing the flow of the fluid to flow through the flow path. If the amount of fluid passing through the channel decreases, the desired flow resistance cannot be obtained, so it is necessary to bring the tip of the movable vane into contact with the inner circumferential surface of the casing to properly seal the space therebetween. In the case of the above configuration, there is a problem that the movable vane becomes an obstacle when assembling the roll damper device by connecting the casing and the rotating shaft, resulting in poor workability.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to effectively seal a fluid chamber to create a predetermined flow resistance without impairing workability during assembly of a roll damper device. It is an object of the present invention to provide a roll damper device that can appropriately damp vibrations caused by rolls of a vehicle.

[Means to solve the problem]

The invention described in claim 1 provides a roll damper device disposed between inner end portions of a pair of left and right rods whose outer end portions are respectively connected to left and right wheel support members and rotate in accordance with the vertical movement of the wheels. , a rotating shaft connected to rotate integrally with one of the two rods, an outer cylinder connected to rotate integrally with the other rod and surrounding the rotating shaft, and from the outer peripheral surface of the rotating shaft. The first part protrudes toward the inner circumferential surface of the outer cylinder.
a partition plate, a second partition plate that faces the first partition plate and protrudes from the inner circumferential surface of the outer cylinder toward the outer circumferential surface of the rotating shaft; a fluid chamber defined by a second partition plate;
A sealing member that elastically contacts the inner circumferential surface of the outer cylinder is provided at the tip of the first partition plate, and a sealing member that elastically abuts the outer circumferential surface of the rotating shaft is provided at the tip of the second partition plate. It was established.

Further, the invention described in claim 2 provides the following features: at the tip of the first partition plate protruding from the outer circumferential surface of the rotating shaft and at the tip of the second partition plate protruding from the inner circumferential surface of the outer cylinder, A seal member is constituted by a cap member slidably supported in the radial direction of the rotating shaft, and an introduction hole for introducing fluid into the space between the cap member and the partition plate is formed. It is equipped with a check valve to prevent fluid from flowing out.

[For production]

According to the invention described in claim 1, the outer cylinder and the rotation shaft are connected with each other while the seal member provided at the tip of the second bulkhead plate is retracted against its elastic force. The roll damper device can be assembled by using the roll damper device, and after the assembly is completed, the sealing performance is ensured by the elastic force of the seal member.

Further, according to the invention as claimed in claim 2, the first aspect of the invention is as follows. Assembling the mouth damper device by connecting the outer cylinder and the rotating shaft with the sealing member, which is a cap member provided at the tip of the second partition plate, slid toward its base end and retracted. At the same time, after the assembly is completed, when the cap member is used, fluid flows into the cap member from the introduction hole, and the cap member slides toward its tip, so that the tip of the cap member touches the inner circumferential surface of the outer cylinder. Alternatively, each of them automatically comes into contact with the outer circumferential surface of the rotating shaft, and the sealing effect is exerted.

〔Example〕

FIG. 1 shows a double wishbone type suspension equipped with a roll damper device according to an embodiment of the present invention. This suspension includes a knuckle arm 2 that rotatably supports a wheel 1, and a knuckle arm 2 that rotatably supports a wheel 1.
The wheel support member includes an upper arm 3 and a lower arm 4 that respectively support the upper and lower ends of the wheel. The lower arm 4 is connected to the vehicle body by a shock absorber 5 and a coil spring 6 installed on the upper outer periphery of the shock absorber 5, and the damping force of the shock absorber 5 damps the vertical vibration of the vehicle body. The spring force of the spring 6 is configured to suppress vertical displacement of the vehicle body.

Further, the lower arm 4 has a pair of left and right O-dos 7A, 7.
The outer ends of B are connected. These rods 7A, 7B are composed of a shaft portion 7a extending in the vehicle width direction, and an arm portion 7b extending in the longitudinal direction of the vehicle body at the outer end of the shaft portion 7a. is connected to. And the rods 7A, 7
The shaft portion 7a of B is rotatably supported on the vehicle body by a bushing 8, and when the arm portion 7b swings in response to the vertical displacement of the wheel 1, the shaft portion 7a rotates accordingly. It has become. Further, both the rods 7A and 7B are connected to each other by a roll damper device 9 provided between their inner ends.

As shown in FIGS. 2 to 4, the roll damper device 9 includes a rotating shaft 10 that is connected to the inner end of one rod 7A through serrations and rotates together with the rod 7A.
A casing 15 that includes a side plate 12 rotatably supported at the base end of the rotating shaft 10 via a bearing 11, and an outer cylinder 14 that is connected to the outer periphery of the side plate 12 through serrations and surrounds the rotating shaft 10. It has At the side end of the casing 15, the tip of the rotating shaft 10 is rotatably supported via a bearing 13, and
A side wall 16 is formed which is connected to the inner end of the rod 7B through serrations and rotates together with the rod 7B. On the outer circumferential surface of the rotating shaft 10, four first partition plates 17 extending toward the inner circumferential surface of the outer cylinder 14 are provided to protrude radially. Furthermore, four second partition plates 18 are provided on the inner circumferential surface of the outer cylinder 14 to protrude from the first partition plate 17 and extend toward the outer circumferential surface of the rotating shaft 10. The space between the rotating shaft 10 and the outer cylinder 14 is divided into eight fluid chambers 19 by the second partition plates 17 and 18.

Further, both end portions of the fluid chamber 19 are respectively covered by side wall plates 20 protruding from the rotating shaft 10 and the side wall 16, and a fluid such as silicone oil is sealed in the fluid chamber 19. A flow path 21 is formed in the second partition plate 18 and is formed of an orifice that allows adjacent fluid chambers 19 to communicate with each other. A sealing member 22 that elastically contacts the inner circumferential surface of the outer cylinder 14 is provided at the tip of the first partition plate 17, and a sealing member 22 is provided at the tip of the second partition plate 18 to contact the outer circumferential surface of the rotating shaft 10. A resiliently abutting seal member 23 is provided. Note that since both the seal members 22 and 23 have the same structure, the structure of the seal member 22 of the first partition plate 17 will be explained below.

As shown in FIGS. 5 and 6, the seal member 22 is attached to a cap member 24 that is slidably supported along the wall surface of the first partition plate 17 in the radial direction of the rotating shaft 10 at the tip of the first partition plate 17. Introductory holes 26 are formed on both left and right wall surfaces of the cap member 24, respectively, for introducing the fluid in the upper fluid chamber 9 into the space 25 between the cap member 24 and the tip of the first partition plate. ing. A check valve 27 made of a spring material and having a U-shaped cross section for closing both the introduction holes 26 is installed in the space 25 so as to be swingable about its base end. A corrugated spring member 28 is disposed below the spring member 26 . The spring member 28 is configured such that the upper surfaces of both sides thereof come into contact with the stepped portions formed on the lower side of the cap member 24, thereby biasing the cap member 24 toward its tip end.

In the above configuration, the vehicle body rolls when the vehicle makes a sharp turn,
If vibration occurs in which the left and right wheels 1 move up and down in opposite directions due to this roll, both rods 7A and 7B
When the arm portions 7b of the arm portions 7b are respectively oscillated and the left and right shaft portions 7a are rotationally displaced in opposite directions, the rotating shaft 10 and the outer cylinder 14 of the roll damper device 9 rotate relative to each other. The resulting fluid flow resistance exerts a damping effect. That is, as shown in FIG. 7, when the rotating shaft 10 and the outer cylinder 14 rotate relative to each other, the internal pressure of one of the adjacent fluid chambers 19 increases, so that the fluid inside thereof increases as indicated by the arrow. As such, the fluid flows through the communication path 21 into the other fluid chamber 19, and the relative rotation of the rods 7A, 7B is suppressed by the flow resistance, and vibrations caused by the rolls are damped.

Further, as the internal pressure of one of the fluid chambers 19 increases, a pressure difference occurs between the internal pressure of the fluid chamber 19 and the internal pressure of the space 25, and the sixth
As shown by the imaginary line in the figure, the check valve 27 swings, opening the introduction hole 26 facing the fluid chamber 19 where the internal pressure has increased.

As a result, the fluid in the fluid chamber 19 flows into the space 25 between the cap member 24 and the first partition plate 17,
The pressure causes the cap member 24 to slide toward the tip, and the tip elastically contacts the inner circumferential surface of the outer tube 24, thereby sealing the space between the first partition plate 17 and the outer tube 14.

As described above, the tip of the first partition plate 17 protrudes from the outer circumferential surface of the rotating shaft 10 and the second partition plate protrudes from the inner circumferential surface of the outer cylinder 14.
Since the seal members 22 and 23 made of the cap member 24 are installed at the distal end of the partition plate 18 so as to be able to slide freely in the axial direction of the rotating shaft 10, the cap member 24 is placed on the proximal end side when the roll damper device 9 is assembled. By sliding and reducing the amount of protrusion, the rotating shaft 10 can be inserted into the outer cylinder 14 without the cap member 24 coming into contact with the inner peripheral surface of the outer cylinder 14 and the outer peripheral surface of the rotating shaft 10. I can do it.

In addition, a fluid introduction hole 26 is formed in the cap member 24, and a check valve 27 is provided to prevent fluid from flowing out from the introduction hole 26. According to the relative rotation between the cylinder 14 and the rotating shaft 10, fluid is caused to flow into the space 25 of the cap member 24 from the introduction hole 26 facing the fluid chamber 19 on the side where the internal pressure increases and to be held therein. With this structure, the tip of the cap member 24 is automatically brought into elastic contact with the inner circumferential surface of the outer cylinder 14 or the outer circumferential surface of the rotating shaft 10, thereby effectively sealing each fluid chamber 19. be able to.

Further, in the above embodiment, a corrugated spring member 28 is disposed within the space 25 of the cab member 24, and the spring member 28 is configured to bias the cab member 24 toward its tip end. Even if the closing function of the introduction hole 26 is impaired due to damage to the check valve 27, etc.,
When in use, the spring member 28 biases the cap member 24 in a direction to bring it into contact with the inner circumferential surface of the outer cylinder 14 or the outer circumferential surface of the rotating shaft 10, and there is an advantage that the sealing effect can be maintained. Note that instead of the check valve 27 made of a spring material having a U-shaped cross section, a plate-shaped check valve may be attached to the inner surface of each introduction hole 26. Alternatively, the introduction hole 26 may be provided only on one side wall of the YAP member 24.

Further, as shown in FIG. 8, the first partition plate 17 and the second
A sealing member 29 consisting of a pair of elastic plates is attached to the tip of the partition plate 18 with a pin or the like, and the tip of the sealing member 29 is elastically brought into contact with the inner circumferential surface of the outer cylinder 14 and the outer circumferential surface of the rotating shaft 10, respectively. It may be configured so that they are in contact with each other.

(Effects of the Invention) As explained above, the present invention provides a roll damper device that damps vibrations caused by rolls during sharp turns, and a partition wall forming a fluid chamber disposed inside the roll damper device. Since a sealing member is provided at the tip of the plate to elastically abut the opposing surface, each fluid chamber is effectively sealed by the sealing member, and the fluid is not allowed to flow through the part other than the flow path formed in the partition plate. It is possible to prevent the fluid from moving.Therefore, when the above-mentioned vibration occurs, the fluid can be caused to flow through the flow passage of the partition plate, and the flow resistance can exert a predetermined damping force.Furthermore, the roll damper When assembling the device, by retracting the sealing member toward the proximal end against its elastic force, interference between the facing surface and the sealing member can be prevented, and the assembly work can be easily performed. There is.

In addition, when the sealing member is constituted by a cap member slidably supported at the distal end of the partition plate, the cap member may be retracted by sliding toward the proximal end when assembling the roll damper device. This can prevent the tip of the cab member from coming into contact with the opposing surface.

By introducing fluid into the interior through the introduction hole formed in the cap member and preventing the fluid from flowing out using a check valve, when using the assembled roll damper device, the cap member can be removed from the introduction hole. Fluid is allowed to flow into the interior, and the cap member can be moved toward the distal end side by the internal pressure and automatically brought into contact with the opposing surface. Therefore, it is possible to further improve the workability when assembling the roll damper device, and there is an advantage that good sealing performance can be maintained during use.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a suspension equipped with a roll damper device according to an embodiment of the present invention, FIG. 2 is a sectional view showing essential parts of the roll damper device, and FIG. 3 is an exploded perspective view of the roll damper device. 4 is a sectional view taken along the line IV-IV in FIG. 2, FIG. 5 is a partially enlarged view of FIG. 4 showing the structure of the sealing member, and FIG. 6 is a sectional view taken along the line VI-VI in FIG. 7 is a view corresponding to FIG. 4 showing the moving state of the partition plate, and FIG. 8 is a view corresponding to FIG. 4 showing another embodiment of the present invention. 1...Wheel, 4...Lower arm (wheel support member),
7A, 7B... Rod, 9... Roll damper device,
DESCRIPTION OF SYMBOLS 10... Rotating shaft, 14... Outer cylinder, 17... First partition plate, 18... Second partition plate, 19... Fluid chamber, 22
, 23.29... Seal member, 24... Cap member, 26... Introduction hole, 27... Check valve. Figure 1

Claims (1)

[Claims] 1. A roll damper device disposed between the inner ends of a pair of left and right rods whose outer ends are respectively connected to left and right wheel support members and rotate in accordance with the vertical movement of the wheels, A rotating ring connected to rotate together with one of the two rods, an outer cylinder connected to the other rod to rotate together and surrounding the rotating shaft, and an outer cylinder connected to the outer peripheral surface of the rotating shaft. a first partition plate protruding toward the inner circumferential surface of the outer cylinder; and a second partition plate protruding from the inner circumferential surface of the outer cylinder toward the outer circumferential surface of the rotating ring in opposition to the first partition plate. , a fluid chamber partitioned by the first and second partition plates, a sealing member elastically abutting against the inner circumferential surface of the outer cylinder is provided at the tip of the first partition plate, and the second partition plate A roll damper device characterized in that a sealing member that elastically abuts the outer circumferential surface of a rotating shaft is provided at the tip of the plate. 2. The tip of the first partition plate protruding from the outer circumferential surface of the rotating shaft and the tip of the second partition plate protruding from the inner circumferential surface of the outer cylinder are slidable in the radial direction of the rotating ring. The supported cap member constitutes a seal member, and an introduction hole for introducing fluid into the space between the cap member and the tip of the partition plate is formed, and the fluid is prevented from flowing out from the introduction hole. 2. The roll damper device according to claim 1, further comprising a check valve for preventing this.