JPH0342271Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field of the Invention) The present invention relates to a structure for connecting a shaft to an object, and more specifically, the present invention relates to a structure for connecting a shaft to an object, and more specifically, to connect a strut bar, suspension arm, lateral rod, or other shaft installed in an automobile suspension to a vehicle body or axle. It relates to a structure that connects to a housing or other object.

(Prior art) For example, when connecting a strut bar to a vehicle body, a structure is generally adopted in which a rubber bush is interposed to prevent vibrations from being transmitted from the strut bar to the vehicle body. After the bushing is assembled to the vehicle body with the specified values, the spring constant of the bushing is uniquely fixed and the spring characteristics cannot be changed.

A structure in which two fluid chambers are provided in the bush, the two fluid chambers are communicated via an orifice, and the damping force generated by the flow of the fluid filled in the fluid chamber is utilized (for example, No. Publication,
According to Japanese Utility Model Application Publication No. 58-76837, etc.), the spring characteristics can be changed.

The suspension bush disclosed in Japanese Utility Model Application Publication No. 58-106206 divides the inside of the casing into two spaces by a movable wall, and a dart pot is arranged in one of the spaces, and the piston of the dart pot , actuating a valve body that opens and closes a hole in the movable wall. According to this, the spring constant changes automatically, and it is possible to improve steering stability and riding comfort.

(Problems to be solved by the invention) With the structures disclosed in the above-mentioned publications, after being assembled to a car body or other object, the spring characteristics can be changed according to the driver's preference, and one structure can be used to meet multiple specifications. It is not possible to adapt the structure to the standard, and some have complex structures.

An object of the present invention is to provide a coupling structure that can change the spring characteristics even after coupling to other objects of the vehicle body.

Another object of the present invention is to provide a simple coupling structure that can be adapted to multiple specifications with one structure.

(Means for Solving the Problems) A shaft coupling structure according to the present invention includes a shaft having a cylindrical eye at the end, and a shaft that is disposed to pass through the eye of the shaft, and that allows the eye to be removed from an object. a connecting member that is capable of being coupled to the eye and having a hole for inserting a valve body extending in the axial direction of the eye and a passage extending radially across the hole; A bush made of an elastic body and having a pair of fluid chambers provided on opposite sides thereof and communicating with each other through the passage of the connecting member, the bush being located inside the eye of the shaft and outside the connecting member. A valve body, the valve body having a bush that is arranged and through which the connecting member is removably inserted, and a passage that is composed of a plurality of passage portions having different diameters that can communicate with the passage, and that is rotatably arranged in the hole of the connecting member. and a valve body having an operating part for rotating from the outside.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

The coupling structure 10, as shown in FIG.
8 and a valve body 20.

For example, in an automobile suspension, the shaft 12 is a strut bar that restrains the longitudinal movement of a suspension arm, a lateral rod that restrains the lateral movement of an axle housing, a link that constitutes a four-link suspension, and a trailing arm suspension. Shion's arm etc.

In the illustrated example, the connecting member 14 is a bolt,
It extends in a direction perpendicular to the axis of the shaft 12. The bolt is passed through a bushing 18 and an object 16 located inside an eye 13 provided at the end of the shaft 12, and a washer 21 is inserted into the threaded portion protruding from the object 16.
is fixed by screwing a nut 22 onto the threaded portion, and the shaft 12 is coupled to the object 16 by cooperation with the nut 22.

The connecting member 14 has a hole 24 opened in the axial direction from the end surface on the screw side, and a first passage 26 opened diametrically from the hole 24 toward the outer peripheral surface.

The object 16 is, for example, a bracket projecting from the body of an automobile, an axle housing, a suspension arm, or the like.

The bush 18 is made of rubber, and as shown in FIG.
It has a pair of fluid chambers 28 and 30 provided on opposite sides of the body.

In the illustrated example, the bush 18 is vulcanized and bonded to the inner cylinder 32 and the outer cylinder 34. The inner cylinder 32 has a pair of holes 33 at a diametrically opposite position to the first passage 26 of the connecting member 14, and the outer cylinder 34 has a pair of holes 33 at a diametrically opposite position to each hole 33. It has a large hole 35. The hole 33 in the inner cylinder is the fluid chamber 28,
30 is communicated with the first passage 26 of the connecting member 14, and the hole 35 in the outer cylinder is provided for convenience when the bush 18 is vulcanized and bonded. The bush 18 extends inwardly through the hole 33 in the inner cylinder and outwardly through the hole 35 in the outer cylinder, and the seal lip 3
6.

O-rings 38 and 40 for sealing are arranged on the connecting member 14 across the first passage 26, the connecting member 14 is fitted into the inner cylinder 32 of the bush 18, and the first passage 26 is inserted into the inner cylinder. It is made to face the hole 33. In addition, the outer cylinder 34 of the bush 18 is provided with O for sealing at both ends.
The rings 42 and 44 are fitted into the eye 13,
The outer cylinder 34 is fixed by caulking the eye 13. As a result, liquid-tight fluid chambers 28 and 30 are defined on both sides of the connecting member 14 in the axial direction of the shaft 12.

The valve body 20 has a sliding part 46, a reduced diameter part 47, and a flat part 4.
8, and the connecting member 14 is attached to the sliding portion 46.
A second passage 50 that can communicate with the first passage 26 is provided. The flat portion 48 serves as an operating portion for rotating the valve body 20 from the outside. In the example shown in FIG. 2, the second passage 50 is connected to the first
a passage portion 52 having the same diameter as the passage 26;
It consists of a narrow diameter passage section 53 spaced 60 DEG from a passage section 52, both passage sections extending diametrically through the slide 46.

When the valve body 20 is in the position shown in FIG. 2, the fluid chambers 28, 30 communicate through the large diameter passageway portion 52, and when the valve body 20 is rotated 60 degrees counterclockwise,
Fluid chambers 28, 30 communicate via a small diameter passageway portion 53. Then, when the valve body 20 is further rotated counterclockwise by 60 degrees, the fluid chambers 28 and 30 are shut off.

The bearing collar 60 is inserted into the hole 24 of the connecting member 14, the sliding plate 62 is placed thereon, the valve body 20 is inserted into the hole 24, and the second passage 50 is connected to the first passage 26 of the connecting member. Make them face each other. A holder 70 in which a sliding plate 64 is arranged on the sliding part 46 of the valve body and O-rings 66 and 68 for sealing are attached.
The valve body 20 is assembled into the hole 24 of the connecting member by press-fitting. A cap 72 is screwed into the hole 24 to prevent dust, water, and other foreign matter from entering the hole 24.

The coupling structure 80 shown in FIG. 3 differs from the coupling structure 10 of the previous example in that it includes an actuator 82. The coupling structure 80 shown in FIG. That is, in the above example, the valve body 20 is disposed within the hole 24 of the connecting member 14, and the hole 24 is closed by the cap 72, whereas the connecting structure 8
0, the valve body 84 is actuated externally by the actuator 82.

The actuator 82 is of a type known per se and is composed of an electric motor and a speed reducer, and is fixed to the connecting member 14 with a bracket 86 sandwiched between the washer 21 and the nut 22. On the other hand, the valve body 84 is
The flat portion 85 is formed longer than the valve body 20 of the coupling structure 10. This flat portion 85 is inserted into a slit provided in the output shaft 83 of the actuator 82. The other configurations of the coupling structure 80 are the same as the coupling structure 10.

(Operation of the embodiment) Fluid is contained in the pair of fluid chambers 28 and 30, that is,
Used by enclosing oil or other liquids, air or other gases, or mixtures of liquids and gases.

When the coupling structure 10 is used, the cap 72 is removed with a screwdriver, and the flat part 48 of the valve body 20 is turned with a jig with a slit (not shown) to adjust the spring constant. With this adjustment, the pair of fluid chambers 28, 3
0 can be communicated through a large diameter passage, communicated through a small diameter passage, or can be blocked.

When the coupling structure 80 is used, when the car is running, due to human operation by the driver,
Alternatively, the actuator 82 is actuated and the valve body 84 is rotated by operation of a controller that receives signals from a speed sensor, an acceleration sensor, a steering wheel rotation angular velocity sensor, and other sensors.

When the valve bodies 84, 20 are in the position shown in FIG.
Since the bushing 18 is in communication with the passage 26, the spring constant of the bushing 18 becomes soft, and a small damping force is generated by the fluid flow.

When the valve bodies 84 and 20 are rotated 60 degrees counterclockwise,
Since the small passage portion 53 of the second passage 50 of the valve body communicates with the first passage 26, the spring constant is in an intermediate state and a large damping force is generated by the fluid flow.

When the valve bodies 84, 20 are further rotated 60 degrees counterclockwise, the first passage 26 and the second passage 50 are cut off, so the fluid does not flow, the spring constant is in a stiff state, and the damping force is reduced. does not occur.

(Effect of the invention) According to the invention, a pair of fluid chambers can be made to communicate with each other through a large aperture, a small aperture, or another sized aperture, or can be blocked by a valve body. I can do it. As a result, after being coupled to a vehicle body or other object, the spring characteristics can be changed according to the driver's preference.

Because one structure can meet at least three specifications, i.e., the spring constant can be soft, medium, or hard, or the damping force can be large, medium, or small. , it is not necessary to manufacture separate joint structures for each vehicle model or specification, and parts management becomes easy.
On the other hand, since the connecting member is removable from the object and the bush, the shaft itself can be replaced when a larger specification is to be changed.

Since the valve body is disposed within the connecting member, the overall structure is simple and can be downsized. Furthermore, since the valve body has an operating portion, the valve body can be easily rotated to a desired position by turning the operating portion with a jig or the like. Furthermore, automatic operation is possible simply by coupling the operating section to the actuator.

By connecting the suspension arm, strut bar, and lateral rod to the vehicle body according to the present invention, the spring constant and damping coefficient of the bushing can be changed manually or automatically. It is possible to improve riding comfort, handling stability, driving stability, etc., and reduce vibration noise.

By connecting the strut bar to the vehicle body according to the present invention, the characteristics of stiffness and flutter can be improved, and ride comfort can be improved.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a connecting structure according to the present invention, FIG. 2 is a vertical cross-sectional view, and FIG. 3 is a cross-sectional view showing another example of the connecting structure. 10, 80: Connection structure, 12: Axis, 14: Connection member, 16: Object, 18: Bush, 20, 8
4: Valve body, 26: First passage, 50: Second passage, 28, 30: Fluid chamber, 82: Actuator.

Claims (1)

[Scope of utility model registration request] a shaft having a cylindrical eye at its end; and a connecting member disposed through the eye of the shaft to removably connect the eye to an object and extending in the axial direction of the eye for insertion of a valve body. a connecting member having a hole and a passage extending in a radial direction across the hole; and a connecting member provided on both sides of the connecting member in the axial direction of the shaft, and through the passage of the connecting member. A bushing made of an elastic body having a pair of fluid chambers communicating with each other, the bushing being disposed inside the eye of the shaft and outside the connecting member, and capable of communicating with the passage through which the connecting member is removably inserted. a valve body having a passage consisting of a plurality of passage portions having different diameters, the valve body being rotatably disposed within the hole of the connecting member, and having an operating portion for rotation from the outside; bond structure.