JP2005048959A - Suspension - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a suspension capable of arbitrarily adjusting its cushioning strength and a vehicle height, and being mounted for a coil spring C of an existing suspension. <P>SOLUTION: This suspension comprises a bellows-shaped inner expansion member 11 and a lantern-shaped outer expansion member 12, the air-tightness is kept between the expansion members, and pressure adjusting means 14-17 are mounted for the air-tight space. Whereby the cushioning strength and the vehicle height can be arbitrarily adjusted in this suspension. Further an upper base 10 and a lower base 6 are mounted, and the inner expansion member 11 and the outer expansion member 12 are mounted therebetween. By mounting them between upper and lower struts 4, 5, the suspension can be mounted for the coil spring C of the existing suspension. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a suspension for reducing vibrations of a vehicle.

  Suspensions are used in vehicles such as passenger cars. As a conventional general suspension, for example, there is a so-called strut suspension. As shown in FIG. 2, this type of suspension connects a wheel and a vehicle body with an oil damper F, and a cylinder E on the wheel side is provided with a lower strut B, and a piston capable of moving forward and backward with respect to the cylinder E. The upper strut A was provided on the upper part of the rod D. The vehicle body is elastically held by interposing a coil spring C between the upper and lower struts A and B.

  However, the conventional suspension uses a coil spring around the oil damper, and the spring force cannot be changed. Therefore, the strength of the cushion and the vehicle height cannot be changed freely.

  On the other hand, an air suspension that changes the strength of the cushion has also been proposed, but it cannot be installed in place of the coil spring of the existing strut suspension. Moreover, there were many complicated structures.

  The present invention has been made in view of the above circumstances, and its main purpose is to change the strength of the cushion and to easily change the vehicle height, and to the coil spring of the existing strut suspension. Instead, it is to provide a suspension that can be easily installed.

In order to solve the above-described problems, the present invention provides a suspension applied between a lower strut provided in a wheel-side cylinder and an upper strut provided on a piston rod capable of moving forward and backward with respect to the cylinder to hold a vehicle body. And, it is characterized by having the following configuration requirements (A) to (E).
(A) A lower pedestal that is fitted into a cylinder and held by a lower strut.
(B) An inner elastic member provided on the lower pedestal and capable of extending and contracting vertically.
(C) An outer stretchable member that can be vertically stretched and disposed outside the inner stretchable member.
(D) An upper pedestal provided at the lower portion of the upper strut and connected to the lower pedestal via an inner elastic member and an outer elastic member.
(E) Pressure adjusting means capable of adjusting the air pressure in the airtight space between the inner elastic member and the outer elastic member.

  Preferably, in addition to the above configuration, the upper pedestal and the lower pedestal have a stepped disk shape, the outer elastic member is fixed to each flange portion of the upper pedestal and the lower pedestal, and the inner side is attached to each boss portion. An elastic member is fixed, the inner elastic member has a bellows shape, and the outer elastic member has a lantern shape.

  Preferably, in addition to the above configuration, a wire is provided in each of the crest and trough of the bellows-like inner elastic member, and a wire is provided in the narrowed portion of the outer elastic member that is in the shape of a lantern. Suspension.

  Preferably, in addition to any of the above-described configurations, the pressure adjusting means is a means for supplying air from the compressor to an airtight space between the inner elastic member and the outer elastic member via a tank and a valve. This valve is a suspension characterized in that it is a switching valve for supplying air from the tank to the space side or for releasing air from the space to the outside.

  Preferably, in addition to any of the above-described configurations, the suspension is provided in place of a coil spring of a strut suspension in which a coil spring is disposed between a lower strut and an upper strut.

  Preferably, in addition to the above configuration, the suspension is attached to one or both of the front wheels and the rear wheels, and is supplied with air from the common tank.

  According to the suspension of the present invention, the strength of the cushion and the vehicle height can be easily changed, and the suspension can be installed in place of the coil spring of the existing suspension.

  Hereinafter, the suspension of the present invention will be described in more detail based on examples. FIG. 1 is a schematic sectional view showing an embodiment of the suspension of the present invention.

  The suspension of this embodiment is applied to one or both of the front wheels and rear wheels of a passenger car. An oil damper 1 is provided between the vehicle body and the wheel on which the suspension of this embodiment is installed. The oil damper 1 is provided with a piston rod 2 that can be moved back and forth with respect to the cylinder 3, and the cylinder 3 is provided with a substantially disc-shaped lower strut 5 protruding outward in the radial direction. A substantially disk-shaped upper strut 4 is provided protruding outward in the radial direction. The suspension is installed between the upper strut 4 and the lower strut 5.

A lower pedestal 6 is provided on the upper surface of the lower strut 5. The lower pedestal 6 includes a pipe member 9 that is fitted into the cylinder 3. A disk-shaped pedestal receiver 8 extends radially outward and is fixed to the upper outer peripheral portion of the pipe member 9 by welding. On the upper surface of the pedestal receiver 8, a lower pedestal main body 7 having a stepped disk shape with a boss 7a projecting upward is provided.
The lower pedestal main body 7 is formed with a through hole 7c into which the piston rod 2 or the cylinder 3 is inserted at the center.
The diameter of the flange portion 7 b of the lower pedestal body 7 is substantially the same as the diameter of the pedestal receiver 8, and the lower pedestal body 7 and the pedestal receiver 8 are fixed by bolts 18.
The pipe member 9 is disposed with its lower end inserted into a recessed hole 5 a on the upper surface of the lower strut 5.

A concave groove having a substantially semicircular cross section is formed on the outer peripheral portion of the flange 7b of the lower pedestal main body 7, and a lower end portion of a lantern-shaped outer elastic member 12 made of rubber is attached to the concave groove in an airtight state. It is done.
That is, the upper and lower end portions 12 a and 12 b of the outer elastic member 12 are formed in a substantially circular cross section, and the lower end portion 12 a is fitted into the concave groove of the lower pedestal main body 7 in an airtight state.
Note that the outer elastic member 12 of the present embodiment is substantially cylindrical and has a shape that is slightly narrowed to a small diameter at at least one central portion of the upper and lower end portions 12a and 12b. And in order to increase intensity | strength in the restrict | squeezed part of the outer expansion-contraction member 12, the wire 13 is incorporated in the annular | circular shape. Also, a plurality of wires are incorporated in order to increase the strength in the vertical direction.

A concave groove having a substantially semicircular cross section is formed on the outer periphery of the boss portion 7a of the lower pedestal main body 7 in the same manner as the outer peripheral portion of the flange 7b. The bellows-shaped inner elastic member 11 made of rubber is formed in the concave groove. The lower end portion 11a is attached in an airtight state.
The inner elastic member 11 of the present embodiment has, for example, a bellows shape in which three ridges protrude from the radial direction, and the upper and lower end portions 11a and 11b are formed so that the valley side comes. The upper and lower end portions 11 a and 11 b are formed in a substantially circular cross section like the outer elastic member 12.
In addition, in order to increase intensity | strength, the wire 13 is incorporated in the annular | circular shape in each peak and trough of the inner expansion-contraction member 11. FIG.

An upper base 10 is fixed to the lower part of the upper strut 4 with bolts 19.
The upper pedestal 10 has a stepped disk shape like the lower pedestal main body 7 and is disposed so as to protrude downward from the boss portion 10a. A concave groove having a substantially semicircular cross section is formed in the outer periphery of the boss 10a and the flange 10b of the upper base 10 in the same manner as the lower base body 7. Then, the end portions 11b and 11a of the inner elastic member 11 are attached to the recessed grooves on the outer peripheral portions of the bosses 10a and 7a of the upper base 10 and the lower base body 7 in an airtight state. Further, the end portions 12b, 12a of the outer elastic member 12 are attached to the recessed grooves in the outer peripheral portions of the flanges 10b, 7b of the upper pedestal 10 and the lower pedestal main body 7 in an airtight state. Further, the upper base 10 is formed with a through hole 10c into which the piston rod 2 is inserted at the center.

  In this way, the space between the inner elastic member 11 and the outer elastic member 12 is held in an airtight space. The pressure in the airtight space can be adjusted using a compressor 15 or the like. In other words, a tank 16 is connected to the compressor 15, and a switching valve 17 is connected to the tank 16, and the valve 14 disposed through the pedestal receiver 8 and the flange portion 7 b of the lower pedestal main body 7 is provided. It leads to an airtight space. When the pressure in the airtight space is increased, the air in the tank 16 is sent in, and when it is lowered, the air from the airtight space is allowed to escape from the switching valve 17. By the way, when the suspension of the present embodiment is installed at a plurality of locations in one vehicle, air may be supplied from the common tank 16 to each wheel side. Note that air supply to the airtight space and air discharge from the airtight space are performed by operating a switch provided in the driver's seat or the like.

  Incidentally, the suspension of this embodiment can be provided in place of the coil spring C of the strut suspension in which the coil spring C is disposed between the lower strut 5 and the upper strut 4 (see FIG. 2). . Therefore, the existing strut suspension can be easily replaced with the suspension of the present invention.

  The suspension of the present invention is not limited to the configuration of the above-described embodiment, and can be changed as appropriate. For example, the connections between the upper and lower pedestals 10 and 7 and the inner and outer expansion and contraction members 11 and 12 are preferably performed more securely by clamping with concave grooves. That is, after the end portions 11a, 12a, 11b, and 12b of the telescopic members 11 and 12 are fitted on the outer periphery of the boss portions 10a and 7a or the flange portions 10b and 7b of the bases 10 and 7, they are fastened so as to be tightened by the belt-like member. Is good.

It is a schematic sectional drawing which shows one Example of the suspension of this invention. It is a schematic sectional drawing which shows an example of the conventional strut type suspension.

Explanation of symbols

2 piston rod 3 cylinder 4 upper strut 5 lower strut 6 lower pedestal 10 upper pedestal 11 inner telescopic member 12 outer telescopic member 13 wire 14 valve 15 compressor 16 tank 17 switching valve A upper strut B lower strut C coil spring D piston rod E cylinder F Oil damper

Claims (6)

A suspension applied between a lower strut provided in a cylinder on the wheel side and an upper strut provided on a piston rod capable of moving forward and backward with respect to the cylinder and holding a vehicle body,
A lower pedestal that is fitted into the cylinder and held by the lower strut;
An inner elastic member provided on the lower pedestal and capable of extending and contracting vertically;
An outer stretchable member that can be vertically stretched and disposed outside the inner stretchable member;
An upper pedestal provided at a lower portion of the upper strut and connected to the lower pedestal via an inner elastic member and an outer elastic member;
A suspension comprising: a pressure adjusting means capable of adjusting an air pressure in an airtight space between the inner elastic member and the outer elastic member. The upper pedestal and the lower pedestal have a stepped disk shape, the outer elastic member is fixed to each flange portion of the upper pedestal and the lower pedestal, the inner elastic member is fixed to each boss portion, and the inner elastic member is The suspension according to claim 1, wherein the suspension has a bellows shape, and the outer elastic member has a lantern shape. The suspension according to claim 2, wherein a wire is provided in each of a peak and a valley of the bellows-like inner elastic member, and a wire is provided in a narrowed portion of the outer elastic member having a lantern shape. The pressure adjusting means is means for supplying air from the compressor to an airtight space between the inner elastic member and the outer elastic member through a tank and a valve.
4. The valve according to claim 1, wherein the valve is a switching valve for supplying air from the tank to the space side or for releasing air from the space to the outside. Suspension according to crab. The suspension according to any one of claims 1 to 4, wherein the suspension is provided in place of a coil spring of a strut suspension in which a coil spring is disposed between a lower strut and an upper strut. The suspension according to claim 4 or 5, wherein the suspension is attached to each of one or both of front wheels and rear wheels and supplied with air from the common tank.

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