JP2002234326A - Vehicle height adjuster for air suspension - Google Patents

Abstract

PROBLEM TO BE SOLVED: To meet a strong demand of some drivers in recent years for a different automobile from other automobiles and for a change by an increased or reduced vehicle height other than those of other vehicles. SOLUTION: An air suspension comprises a cylinder having an air filling part on a cylindrical body, a piston fitted in the cylinder, a piston rod fixed to the piston and passed through the cylinder, a coil spring disposed about a barrel of the cylindrical body, an upper spring receiving member for receiving an upper end of the coil spring while holding the cylindrical body passed therethrough, and a lower spring receiving member for receiving a lower end of the coil spring while holding the piston rod passed therethrough. The periphery of the cylindrical body is threaded with an external ridge, and the upper spring receiving member is threaded with an internal ridge. The periphery of the piston rod is threaded with an external ridge, and the lower spring receiving member is threaded with an internal ridge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle height adjusting device for an air suspension interposed between a vehicle body and an axle. More specifically, the present invention relates to an apparatus for fixing a cylinder to a vehicle body and a piston rod. The present invention relates to a vehicle height adjusting device for an air suspension, which is capable of adjusting a vehicle height by changing a width of expansion and contraction of a coil spring of an air suspension that fixes the air suspension and the elasticity of the coil spring.

[0002]

2. Description of the Related Art The place where this type of air suspension is mounted is limited. Conventionally, it is difficult to mount a large-diameter cylindrical cylinder or to inject high-pressure air. The coil diameter is reduced and the air pressure is reduced to use a coil spring.

[0003]

However, there is a strong demand among drivers in recent years to have an automobile different from other automobiles, and a change in the height is made higher or lower than other automobiles. The tendency is strong.

[0004]

SUMMARY OF THE INVENTION In view of the above problems, as a result of study, a vehicle height adjusting device for an air suspension interposed between a vehicle body and an axle, wherein an air injection portion is provided at an upper end portion of a cylindrical main body. A cylinder provided, a piston slidably housed inside the cylinder, a piston rod fixed to the piston and penetrating the lower end of the cylinder, and disposed so as to wind at least the circumference of the cylindrical body. A coil spring, an upper spring receiving member that penetrates and mounts the outer periphery of the cylindrical body that receives the upper end of the il spring, and a lower spring receiving member that penetrates and mounts a piston rod that receives the lower end of the coil spring. An external thread is screwed on the outer periphery of the cylindrical main body, and a female screw engaged with the external thread is screwed on the upper spring receiving member, and an external thread is formed on the outer periphery of the piston rod. While set is obtained by screwed the external thread and screwed the internal thread in the lower spring receiving member.

[0005]

According to the vehicle height adjusting device of the air suspension of the present invention, a male screw is screwed around the outer periphery of the cylindrical body of the cylinder connected to the vehicle body, and the female screw is screwed with the male screw. A thread is threaded on the upper spring receiving member, a male thread is threaded on the outer periphery of the piston rod of the piston connected to the axle, and a female thread engaged with this male thread is formed on the lower spring receiving member. By screwing, by rotating the upper spring receiving member or the lower spring receiving member, the interval between the upper spring receiving member and the lower spring receiving member changes, and the expansion and contraction width of the coil spring can be changed. The vehicle height can be adjusted because the stroke of the piston of the air suspension changes with this change.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicle height adjusting device in an air suspension according to the present invention will be specifically described below with reference to the drawings.

FIG. 1 is a schematic explanatory view of an embodiment of a vehicle height adjusting device in an air suspension according to the present invention.
FIG. 3 is a schematic explanatory view showing a state in which an upper spring receiving member is moved in the embodiment of the vehicle height adjusting device in the air suspension of the present invention.

The present invention relates to a vehicle height adjusting apparatus for an air suspension interposed between a vehicle body and an axle. More specifically, the present invention relates to a vehicle height adjustment apparatus, and more particularly, to fixing a cylinder 1 to a vehicle body and a piston rod 2a to an axle. The present invention relates to a vehicle height adjusting device for an air suspension, which is capable of adjusting a vehicle height by changing an elastic coefficient of a coil spring 3 of an air suspension which is fixed to a side and buffers by an air pressure and the elasticity of the coil spring 3, A cylinder height adjusting device for an air suspension interposed between a vehicle body and an axle, comprising: a cylinder 1 provided with an air injection portion 1c at an upper end portion 1b of a cylindrical main body 1a;
A piston 2 slidably provided inside the inside of the cylinder 1, a piston rod 2a fixed to the piston 2 and penetrating the lower end 1d of the cylinder 1, and arranged so as to wind at least the circumference of the cylindrical main body 1a. A coil spring 3 to be installed,
An upper spring receiving member 4 which is mounted by penetrating the outer periphery of the cylindrical main body 1a which receives the upper end of the coil spring 3, and a piston rod 2a which receives the lower end of the coil spring 3
And a lower spring receiving member 5 for allowing the male screw 1e to be screwed around the outer periphery of the cylindrical main body 1a, and a female screw 4a to be screwed with the male screw 1e to be mounted on the upper spring receiving member. A male screw 2b is screwed on the outer periphery of the piston rod 2a, and a female screw 5a screwed with the male screw 2b is screwed on the lower spring receiving member 5. .

That is, the vehicle height adjusting device of the air suspension according to the present invention comprises the cylinder 1, the piston 2, the coil spring 3, the upper spring receiving member 4, and the lower spring receiving member 5.

The cylinder 1 has a cylindrical main body 1a.
And an upper end 1b at the upper end of the cylindrical main body 1a and a lower end 1d at the lower end, and injecting air supplied from an air source (not shown) through the upper end 1b. A portion 1c is provided, and an upper end portion 1b is fixed to the vehicle body side.

The piston 2 is slidably mounted inside the cylinder 1. The piston 2 is provided with a piston head 2c at the tip, and a plurality of piston rings 2d are provided around the body of the piston head 2c. A piston rod 2a extends from the base end, and the piston rod 2a slidably penetrates the lower end 1d of the cylinder 1. The piston head 2c and the upper end of the cylinder 1 are slidable. 1b, an air chamber 6 connected to an air injection portion 1c, and a piston rod 2a extending downward.
Is fixed to the axle side.

Next, the coil spring 3 is interposed between an upper spring receiving member 4 provided on the outer periphery of the cylindrical main body 1a of the cylinder 1 and a lower spring receiving member 5 provided on the outer periphery of the piston rod 2a. The cylinder 1 is disposed so as to wind the outer periphery of the cylindrical body 1a of the cylinder 1 and the outside of the piston rod 2a.

The upper spring receiving member 4 is a dish-shaped member for receiving the upper end of the coil spring 3 and is provided with a through hole at the center and mounted on the outer periphery of the cylindrical main body 1a of the cylinder 1. The member 5 is a dish-shaped member that receives the lower end of the coil spring 3 and is provided with a through hole at the center and attached to the outer periphery of the piston rod 2a. The upper spring receiving member 4 and the lower spring receiving member 5 are opposed to each other. Is what it is.

Next, when the upper spring receiving member 4 is mounted on the cylindrical main body 1a of the cylinder 1, a male screw 1e is screwed around the body of the cylindrical main body 1a and screwed with the male screw 1e. The female thread 4a is screwed into a through hole of the upper spring receiving member 4. When the piston rod 2a and the lower spring receiving member 5 are mounted, a male thread 2b is threaded around the outer periphery of the piston rod 2a. At the same time, a female screw thread 5a screwed with the male screw thread 2b is screwed into a through hole of the lower spring receiving member 5.

That is, in the vehicle height adjusting device of the air suspension according to the present invention, the distance between the upper spring receiving member 4 and the lower spring receiving member 5 is reduced by rotating the upper spring receiving member 4 or the lower spring receiving member 5. The length of the expansion and contraction of the coil spring 3 can be changed by changing the interval, and the stroke of the piston 2 of the air suspension changes with the change of the expansion and contraction width.

Therefore, for example, when the upper spring receiving member 4 is turned upward from the position shown in FIG. 1 to the position shown in FIG. Since the distance between the upper spring receiving member 4 and the lower spring receiving member 5 is widened, the width of expansion and contraction of the coil spring 3 becomes large, and a load is applied to remove air from the air chamber. When the head is located above the cylinder, the length of the coil spring is minimum, and the vehicle height is higher than the state shown in FIG.

Conversely, when the upper spring receiving member 4 is rotated to be positioned below as shown in FIG. 1, the distance between the upper spring receiving member 4 and the lower spring receiving member 5 becomes smaller. The distance between the upper spring receiving member 4 and the lower spring receiving member 5 is reduced, and the length of the coil spring is minimized when the piston head is located above the cylinder when a load is applied and air in the air chamber is released. However, the coil spring 3 is shorter than the case shown in FIG. 2 and the vehicle height is lower.

[0018]

According to the present invention, a male screw is screwed on the outer periphery of a cylindrical body of a cylinder, and a female screw screwed with the male screw is screwed on an upper spring receiving member. A simple configuration in which a male screw thread is screwed on the outer circumference of the rod and a female screw screwed with the male screw thread is screwed into the lower spring receiving member makes it easy to adjust the vehicle height desired by the car owner. This is a revolutionary and highly practical invention.

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view of an embodiment of a vehicle height adjusting device in an air suspension of the present invention.

FIG. 2 is a schematic explanatory view showing a state in which an upper spring receiving member is moved in the embodiment of the vehicle height adjusting device in the air suspension of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder 1a Cylindrical main body 1b Upper end part 1c Air injection part 1d Lower end part 1e Male screw 2 Piston 2a Piston rod 2b Male screw 2c Piston head 2d Piston ring 3 Coil spring 4 Upper spring receiving member 4a Female screw 5 Lower spring Receiving member 5a Female thread 6 Air chamber

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F16F 9/32 N

Claims (1)

[Claims] 1. A vehicle height adjusting device for an air suspension interposed between a vehicle body and an axle, wherein the cylinder has an air injection portion provided at an upper end portion of a cylindrical main body, and is slidable inside the cylinder. A piston, a piston rod fixed to the piston and penetrating the lower end of the cylinder, a coil spring arranged to wind at least the circumference of the cylindrical body, and an upper end of the coil spring. An upper spring receiving member that penetrates and mounts the outer periphery of the receiving cylindrical body; and a lower spring receiving member that penetrates and mounts a piston rod that receives the lower end of the coil spring. A female thread is screwed on the upper spring receiving member, and a male thread is threaded around the outer periphery of the piston rod. Vehicle height adjusting apparatus in an air suspension, characterized in that the screwed a screwed internal thread in the lower spring receiving member.