JPS6322780A - Car height regulator for car such as motorcycle - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention provides a hydraulic shock absorber interposed between a vehicle body such as a motorcycle and an axle support, and this hydraulic pressure 'G (distance between both ends of the The present invention relates to a vehicle height adjustment device that adjusts vehicle height by changing the vehicle height.

[Prior art]

In this type of vehicle height adjustment device, there is already one that uses a double-tube type loose one-seal device.

In this device, a contact switch is provided on the inner wall of the outer cylinder of the abdominal type shock absorber, and by opening and closing this switch as the shock absorber expands and contracts, the operation of the switching valve is controlled, and air is sucked and discharged into the outer cylinder. By doing so, the distance between both ends of the hydraulic shock absorber was adjusted.

[Problems with conventional technology]

However, in such conventional devices, since the terminals of the contact switch were installed in the air space within the outer cylinder, there was an inconvenience that the contacts were susceptible to wear and deterioration when the contact switch was opened and closed.

[Means for solving the above problems]

An object of the present invention is to eliminate the above-mentioned disadvantages, and this has been achieved by immersing the terminals of the contact switch into the hydraulic oil of the outer cylinder at least when the switch is opened and closed.

[Action of the invention]

The vehicle height adjustment device for vehicles such as motorcycles according to the present invention includes:
With the above structure, the terminal of the contact switch is immersed in the hydraulic oil of the outer cylinder when the switch is opened or closed. It is resistant to wear and deterioration.

[Explanation of Examples]

Hereinafter, the present invention will be explained in detail based on FIGS. 1 to 3.

In FIG. 1, 11 is a frame of a motorcycle, and 13 is an engine mounted within the frame 11. In FIG.

Reference numeral 15 denotes a rear arm, the tip of which is pivotally supported by the frame 11, and the rear end of which pivotally supports the rear wheel 17. 19 is a double-tube hydraulic shock absorber, which includes a frame 11 and a rear arm 15.
It is installed between the tip of the

This double-tube hydraulic shock absorber 19 buffers the vertical movement of the rear wheel 17 and adjusts the vehicle height. Note that 21 is a fuel tank and 23 is a seat, both of which are installed on the frame 11.

Next, based on FIG. 2 and FIG.
The container 19 will be explained in detail.

As shown in FIG. 2, the hydraulic shock absorber 19 is composed of a shock absorbing spring 21 and a hydraulic damper 23.

25 is an inner cylinder constituting the hydraulic damper 23, and is filled with hydraulic oil 0. The inner cylinder 25 has a mounting bracket/nod 27 at its end for attachment to the rear arm 15 (see FIG. 1). 29 is a piston that moves back and forth within the inner cylinder 25, and 31 is a piston rod having one end fixed to the piston 29 and the other end protruding outside the inner cylinder 25. This piston rod 31 has a mounting bracket 33 at its tip for mounting on the frame 11 (see FIG. 1).

The B'+fr spring 21 is installed between the respective mounting brackets 27.33 via spring seats 35.37. Note that 39 is a through hole, which is bored in the root portion of the inner cylinder 25. This through hole 39 is connected to the inner cylinder 25.
The inside of the cover cylinder 41 (described later), and the outside cylinder 43 (described later)
It communicates with the inside. Therefore, when the piston 29 is compressed, zero hydraulic oil is removed by the intrusion of the piston rod 31.
flows into the outer cylinder 43, which will be described later.

Reference numeral 41 denotes a cover cylinder, which is fixed to the mounting bracket 27 with its tip open and externally fitted onto the inner cylinder 25 at a predetermined interval. This cover tube 41 is made of an electrically conductive material and covers the buffer spring 21. 4
3 is an outer cylinder, which is fixed to a spring seat 37 on a piston rod 31. This outer cylinder 43 is fitted onto the cover tube 41 and moves forward and backward together with the piston 29. 4
Reference numeral 5 denotes an annular sealing member, which is fixed to the tip edge of the outer cylinder 43. The outer cylinder 43 slides on the outer wall surface of the cover w141 via this seal member 45 in a liquid-tight manner. Note that the outer cylinder 43 is filled with hydraulic oil O, and a gas portion A is provided above the free liquid level.

Next, in FIGS. 2 and 3, 51 is a contact switch, which is fitted into the wall of the outer cylinder 43. As shown in FIG. The contact switch 51 has a base terminal 53, an upper terminal 55, and a lower terminal 57 that protrude inward from the outer cylinder 43 and are submerged in the hydraulic oil. The tips of the basic terminal 53 and the upper terminal 55 are in contact with the outer wall surface of the cover cylinder 41, and in particular, the basic terminal 53 is always in contact with the outer wall surface of the cover cylinder 41. Further, the tip of the lower terminal 57 is in contact with an intervening plate 59 (made of an electrical conductor) fixed to the outer wall surface of the cover cylinder 41, and the distance between the upper terminal 55 and the lower terminal 57 is automatically adjusted. This is the range in which a motorcycle can maintain an appropriate vehicle height.

In the contact switch 51 configured in this way, when the hydraulic shock absorber 19 is compressed, the upper terminal 55 contacts the outer wall surface of the cover cylinder 41, and the upper terminal 55 and the basic terminal 53 are electrically connected, the electromagnetic switching valve ■ is activated and sends gas to the gas section A of the outer cylinder 43, thereby increasing the pressure of this gas section A and preventing the hydraulic shock absorber 19 from compressing it any further. On the other hand, the hydraulic shock absorber 19 expands, the lower terminal 57 contacts the intervening plate 59 of the cover cylinder 41, and the lower terminal 57 and the basic terminal 5
3, the electromagnetic switching valve V operates in the opposite manner to the above-mentioned operation, exhausts air from the gas section A of the outer cylinder 43, and reduces the pressure of the gas section A.
9 is prevented from expanding further. In this way,
Maintain the motorcycle at an appropriate height.

In this embodiment, the terminals 53, 55, 57 of the contact switch 51 are submerged in the hydraulic oil at the time, but when the contact switch 51 closes these terminals 53, 55, 57, It is also possible to make it sink only.

〔Effect of the invention〕

The vehicle height adjustment device for vehicles such as motorcycles according to the present invention includes:
Since it is configured as described above, that is, the terminal of the contact switch is immersed in the hydraulic oil of the outer cylinder at least when the contact switch is opened and closed, so that the contact is less likely to wear out and deteriorate when the contact switch is opened and closed. As a result, the life of the contact switch can be extended.

[Brief explanation of the drawing]

The drawings show an embodiment of the vehicle height adjustment device for a motorcycle according to the present invention, and FIG. 1 is a front view, FIG. 2 is an enlarged sectional view of the ■ part in FIG. 1, and FIG. I-
[It is a diagram showing the main part of a line cross section. 11 ... Frame 15 ... Axle support part (rear arm) 19 ・
... Hydraulic shock absorber 21 ... Buffer spring 25 ... Inner cylinder 29 ... Piston 31 ... Piston rod 41 ... Cover cylinder 43 ... Outer cylinder 51 ... Contact switch 53.55. 57... Switch terminal (53...
Basic terminal, 55...upper terminal, 57...lower terminal) A... Gas part 0... Hydraulic oil ■... Solenoid switching valve patent applicant Agent: Yamaha Motor Co., Ltd.
Patent Attorney: Yuji Nosue (No change to the contents of the drawings) Figure 1 Figure 2 Figure 3 Procedural Owner's Manual (Method) % Formula % 2. Name of Invention Vehicle height adjustment device for vehicles such as motorcycles 3. Relationship with the case of the person making the amendment Patent applicant address 2500 Shingai, Iwata City, Shizuoka Prefecture Name (
AO7) Yamaha V1 Machine Co., Ltd. Representative: Hideto Fuguchi 4, Agent: 430 5, Date of amendment order: June 30, 1985 (shipment date) 6, Subject of amendment: Drawing 7, Contents of amendment: Application form As shown in the engraving and attachment of the originally attached drawing (no changes to the content)

Claims (1)

[Claims] (1) A hydraulic shock absorber is interposed between the frame of the vehicle and the axle support, and the hydraulic shock absorber includes an inner cylinder in which hydraulic oil is sealed and a piston is fitted so as to be movable forward and backward; a piston rod that is connected and protrudes from the inner cylinder; a buffer spring that is located on the outer periphery of the inner cylinder and installed between the inner cylinder and the piston rod; and a buffer spring that is fixed to the inner cylinder and that a cover cylinder located around the outer periphery of the spring; an outer cylinder fixed to the piston rod and movable toward the outer periphery of the cover cylinder in an airtight state; a contact switch that opens and closes, the outer cylinder communicates with the inner cylinder to accommodate hydraulic oil, and has a gas portion above the free liquid surface of the hydraulic oil, and when the contact switch is actuated, In a height adjustment device for a vehicle such as a motorcycle that adjusts the distance between both ends of the hydraulic shock absorber by controlling a switching valve to suck and discharge air into an air portion in the outer cylinder, the terminal of the contact switch has at least one terminal. A vehicle height adjustment device for a vehicle such as a motorcycle, which is submerged in the hydraulic oil of the outer cylinder when the switch is opened or closed.