JP3109727U - Vehicle height adjustment device - Google Patents

Abstract

A vehicle height adjusting device capable of easily and quickly adjusting the vehicle height is provided.
By changing the fluid pressure in an airtight chamber 13 of a fluid cylinder composed of an outer case 3 fixed to a shock absorber 1, a piston 4, and a stopper 5, the piston is slid in the axial direction, The vehicle's height is adjusted by changing the resilience of the car body.
[Selection] Figure 1

Description

  The present invention relates to a vehicle suspension capable of adjusting a vehicle height.

  In the upper mount fixed to the vehicle body and the suspension in which the coil absorber is attached to the shock absorber attached to the upper mount, the spring seat is screwed to the shock absorber body so that the position can be adjusted, and the spring seat moves up and down. The form which adjusts a vehicle height by making it make it widely used. As a means for easily adjusting the vehicle height, there is a method in which a coil spring is replaced with a rubber spring that expands and contracts by air pressure introduced therein, and the air pressure introduced into the rubber spring is adjusted to change the vehicle height. It is taken.

  The conventional vehicle height adjustable suspension described above has the following problems.

  In the device that adjusts the vehicle height by moving the spring seat up and down, the spring seat is screwed to the shock absorber body and the spring guide is moved up and down. It took a lot of work such as compression of the coil spring by the spring compressor, and the vehicle height could not be adjusted easily.

  In the method of installing a rubber spring instead of a coil spring, the rubber spring has a lower spring constant than the coil spring, so that rolls and pitches are likely to occur, and ride comfort and handling stability are improved due to excessive vehicle posture changes. It was causing sexual deterioration.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to provide a vehicle height adjusting device that can easily and quickly adjust the vehicle height while ensuring ride comfort and handling stability. To do.

  The fluid cylinder part in the present invention is composed of an outer case, a piston and a stopper, and the outer case is airtightly fixed to the piston rod at the upper end, and the piston has an opening at the center and the inside of the outer case. It has a contact surface with a peripheral surface and is slidably inserted between the shock absorber body and the outer case while forming an annular gap between the piston rod and the piston rod. The piston has a guide sleeve portion and suppresses the inclination of the piston. The stopper is attached to the lower end portion of the outer case, and locks the piston to prevent it from falling off and supports the guide sleeve of the piston.

  The outer case and the piston rod, the sliding surfaces of the outer case and the piston, and the sliding surfaces of the piston and the piston rod are each provided with a sealing member and are in airtight contact. This seal member may be any member as long as fluid tightness is maintained. Specifically, an O-ring, pneumatic packing, hydraulic packing, or the like can be used. Since the outer case and the piston rod do not need to slide, the outer case and the piston rod may be hermetically fixed by welding without using the seal member. Since the fluid is introduced from the fluid supply device into the airtight chamber defined by the outer case, the piston, and the piston rod, the piston slides in the axial direction. Alternatively, the elastic force is generated in the extending direction with respect to the vehicle body by indirectly abutting through the buffer rubber, and the fluid pressure in the airtight chamber is adjusted by the connected fluid supply device. As the resilience increases and decreases, the vehicle height changes.

  In addition, specifically, air, hydraulic oil, antifreeze liquid, etc. can be used as the fluid here. Specific examples of the fluid supply device include a compressor, a water pump, and an oil pump.

  In addition, the stroke amount of the piston of the fluid cylinder portion in the present invention does not need to exceed the stroke amount of the piston rod inserted in the shock absorber, and is therefore set equal to or less than the stroke amount of the piston rod.

  In the suspension type in which the coil spring and the shock absorber are disposed coaxially, the spring seat is screwed to the outer periphery of the outer case so that the position can be adjusted. It is possible to arbitrarily set the reference vehicle height.

  The present invention solved the problem by adopting the structure as described above.

  Since this invention is the above structures, it is possible to adjust vehicle height simply and rapidly. In addition, since this device is configured to generate a resilient force at the shock absorber portion and adjust the vehicle height, it can also be applied to a suspension type using a leaf spring.

  Furthermore, since a fluid cylinder and a spring are used together as an elastic element for the vertical movement of the vehicle body, it becomes possible to suppress the occurrence of rolls and pitches compared to devices using only air springs such as rubber springs. It ensures comfort and handling stability.

  In addition, by using the spring together, it is possible to maintain the vehicle height at the initial minimum vehicle height even during fail-safe.

  An embodiment of the present invention will be described below with reference to a structural diagram of a vehicle height adjusting device using air as a fluid.

  FIG. 1 shows an embodiment of a vehicle height adjusting device in a suspension type in which springs are arranged on different axes with respect to a shock absorber 1.

  The air cylinder portion 2 includes an outer case 3, a piston 4, and a stopper 5.

  The outer case 3 has a cylindrical shape, and the diameter is narrowed so that the upper end 3 a of the outer case is in contact with the piston rod 6. The outer case upper end 3 a is airtightly fixed to the piston rod 6 by welding 7. An air valve mounting hole 8 is formed in the upper side surface of the outer case 3, and an air valve (not shown) is mounted in the air valve mounting hole 8.

  The cylindrical piston 4 has a flange portion 4a formed with annular recesses into which the wear ring 9 and the seal member 10 are respectively inserted on the outer peripheral surface. A piston rod insertion hole 4b is formed at the center of the piston 4, and annular recesses into which the seal member 11 and the dust seal 12 are respectively inserted are formed in the inner periphery of the piston rod insertion hole 4b. The piston 4 is slidably inserted between the piston rod 6 and the outer case 3 while forming an airtight chamber 13 between the piston rod 6 and the wear ring 9. The sliding surface is supported, and the sealing member 10 ensures the airtightness of the outer case 3 and the piston 4. Further, the piston 4 has a guide sleeve portion 14 at a lower portion to suppress the inclination of the piston 4. An exhaust hole 15 is formed in the upper end side surface of the guide sleeve portion 14 to release the air between the outer case 3 and the piston 4 to the atmosphere.

  The stopper 5 has a male screw formed at the upper end of the cylinder, and the male screw of the stopper 5 is screwed into the female screw at the lower end of the outer case 3. An annular recess into which the wear ring 16 and the dust seal 17 are fitted is formed on the inner peripheral surface of the stopper 5. The wear ring 16 supports the guide sleeve portion 14 and the dust seal 17 prevents moisture and dust from entering. Further, the inner diameter of the stopper 5 is smaller than the outer diameter of the flange 4a at the upper end of the piston 4, and the piston 4 is locked to prevent the stopper 5 from falling off.

  An upper mount 18 is attached to the end of the piston rod 6, and the upper mount 18 is fixed to a vehicle body (not shown).

  As described above, the outer case 3 and the piston rod 6, the sliding surfaces of the outer case 3 and the piston 4, and the sliding surfaces of the piston 4 and the piston rod 6 are sealed to form an airtight chamber 13. The airtight chamber 13 is supplied with air from an air supply device through an air valve (not shown) attached to the outer case 3. As described above, since the piston 4 is slidably disposed, the piston 4 moves up and down according to the air pressure introduced into the hermetic chamber 13.

  As shown in FIG. 2, the lower cover surface 4 c of the piston 4 that is moved up and down in the axial direction abuts against a bump rubber 19 disposed on the piston rod 6, and the damper case upper cover surface 20 via the bump rubber 19. To generate elasticity in the extending direction. Adjusting the air pressure supplied to the airtight chamber 13 increases or decreases the resilience, so that the vehicle height can be changed.

  The air supply apparatus in the present embodiment can be configured as shown in FIG. 3, for example.

  The compressor 21, the air tank 22, the pressure switch 23, the regulator 24, and the air tank 25 are connected to each other via an air hose 26. The compressed air supplied from the compressor 21 is sent to the air tank 22. The pressure switch 23 is connected to the compressor 21 and the air tank 22. When the air pressure in the air tank 22 falls below a set pressure, the switch is turned on, the compressor 21 is activated, and the air pressure in the air tank 22 is reached. Is switched off when reaches the set pressure. The regulator 24 is disposed between the communication passages of the air tank 22 and the air tank 25 so that the air pressure supplied to the air tank 25 can be adjusted. Finally, air can be supplied from the air tank 25 to the air cylinder part 2 at an arbitrary pressure.

  FIG. 4 shows an embodiment of a vehicle height adjusting device in a suspension type in which a coil spring is coaxially arranged with respect to a shock absorber.

  A male screw is formed on the outer periphery of the outer case 3. Both the annular spring seat 27 and the lock ring 28 for preventing the spring seat 27 from loosening have female threads on the inner periphery, and are screwed onto the outer threads of the outer case 3.

  The coil spring 29 is sandwiched between a lower seat 30 and a spring seat 27 fixed to the shock absorber 1. The reference vehicle height can be arbitrarily set by rotating the spring seat 27 and adjusting the vertical position.

  In the embodiment described above, the air valve mounting hole 8 formed in the upper end side surface of the outer case 3 can communicate with the hermetic chamber 13 such as the outer case upper end portion 3a according to the vehicle body shape and the suspension shape. You may drill in another place.

  In addition, since this apparatus plays the role of an auxiliary spring with respect to the coil spring 29 whose piston 4 is the main elastic element, it may be used as a variable device for the spring constant.

  Moreover, this apparatus may be used not only for a four-wheel shock absorber but also for a two-wheel shock absorber.

It is a partial sectional view showing a vehicle height adjusting device in the present invention. It is a partial cross section figure which shows the form at the time of the piston lowering of the vehicle height adjustment apparatus in this invention. It is a schematic block diagram of the air supply apparatus in this invention. It is a partial sectional view showing a vehicle height adjusting device in a suspension type in which a coil spring is coaxially arranged with respect to a shock absorber.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shock absorber 2 Air cylinder part 3 Outer case 3a Outer case upper end part 3b Outer case 4 Piston 4a collar part 4b Piston rod insertion hole 4c Lower lid surface 5 Stopper 6 Piston rod 7 Welding 8 Air valve mounting hole 9 Wear ring 10 Sealing member 11 Seal member 12 Dust seal 13 Airtight chamber 14 Guide sleeve portion 15 Exhaust hole 16 Wear ring 17 Dust seal 18 Upper mount 19 Bump rubber 20 Damper case upper cover surface 21 Compressor 22 Air tank 23 Pressure switch 24 Regulator 25 Air tank 26 Air hose 27 Spring seat 28 Lock ring 29 Coil spring 30 Lower seat

Claims (3)

    A fluid cylinder unit and a fluid supply device, the fluid cylinder unit having a sliding surface between an outer case whose upper end is airtightly fixed to the upper end of the piston rod and an inner peripheral surface of the outer case, and An annular gap is formed between the piston rod and the piston rod, and the outer case is slidably inserted between the piston rod and a piston having a piston rod insertion hole, and the outer case. The stopper is attached to the lower end portion and locks the piston. The outer case and the piston rod, the sliding surface of the outer case and the piston, and the sliding surface of the piston and the piston rod are sealed. The piston slides when fluid is introduced from a fluid supply device into an airtight chamber defined by the outer case, the piston, and the piston rod. High-adjustment device.     2. The vehicle height adjusting device according to claim 1, wherein a spring seat is screwed onto the outer periphery of the outer case so as to be adjustable in position.     2. The vehicle height adjusting device according to claim 1, wherein the stroke amount of the piston is set to be equal to or less than the stroke amount of the piston rod inserted in the shock absorber.

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