JPS59223584A - Regulator for car height of front fork - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle height adjustment device for a front fork that prevents a front wheel from floating when starting a race or the like in a motorcycle.

A front fork is generally a fork that supports the front wheels of a self-excited two-axle vehicle in a cushioning manner, and has an inner cylinder and an outer cylinder that are slidably fitted together, and the front fork is inserted and fixed into the outer cylinder. The tip of the seat pipe is slidably fitted into the inner cylinder, and a spring is interposed between the tip of the seat pipe and the upper part of the inner cylinder, and the actuator 11!+ is installed inside.・1 person Mechanism 4 is such that the impact generated in the vertical direction of the okiwa is gently reversed.

The soundness ζ, the feel of the motorcycle, at the start of a race, etc., the straw wheel 4
The 111 tends to sink, causing the front wheels to float.

There was a problem that the road surface or other conditions could pose a danger to the passengers, and also have a negative effect on race times.

This invention proposes a vehicle height adjustment device for a front fork aimed at solving the above-mentioned problem, in which a jack unit is inserted and fixed into the inner circumferential center 1 from above the inner cylinder through the spring in the upper part of the inner cylinder. and a pipe having an upper end fixed to a closing member at the upper end of the jacking unit and hanging vertically within the same unit with an annular gap, and having a diameter larger than that of the pipe,
And the piston installed at the upper section; is placed in the jack unit, and the piston installed at the lower section S'::N is placed inside the seat pipe 1d;? - A hollow rod that is fitted into the N1Iil, a cap that serves to restrict the downward movement of the piston at the upper end of the hollow rod, and that closes the lower end of the jack unit to form an oil chamber 2 below the piston; There is an external first sub-tank that passes through a hollow rod and pipe into a passage chamber below the piston in the jack unit, and serves as an outlet for hydraulic oil. The gist is that it is composed of an external second sub-tank that can be freely inflow and outflow.

Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

FIG. 1 is a partially longitudinal plan view showing the sail rigging of this invention.
The first sub tank (1) is the left and right front fork (2)
(2) via pipe (3) (3), and the second sub-tank (4) is also connected to pipe (5) (51).
and is connected to the left and right front forks f2) (2). The second sub-tank (4) is separated into a gas filled x (Bi) and an oil chamber (B2) by a piston (6) fitted in a sliding groove in the second sub-tank (4). The end face of the tank (4) facing the gas filling chamber (B1) is rounded and a pulp (7) for gas filling is attached. In addition, the upper cylinder piston 1/6J is provided with a pulp (8) for air bleeding.

Figure 2 is a continuation of the first sub-tank (1) in Figure 1. This is a normal IH1 diagram, and like the second sub-tank (4), its interior is filled with a gas chamber (A) by a piston (9).
The tank (1) facing the oil chamber (A2) is separated from the oil chamber (A2) and is provided with a pulp chamber (1) for gas filling and a valve ring for air release. An oil passage (J
L) is perforated. At the same time, the locking member side that blocks the oil passage (a) at its tip and the base end of the locking member side are brought into contact via the wire 〇 and the tip member -, and by external operation, the locking member a■ Slide the oil F, ? r (a) A lever mechanism is provided to close the R. Furthermore, a speed control valve αη is provided near the connection port of the pipe (3) of the oil passage (a), and a valve with a different diameter is installed at the cylindrical end of the pulp (17) that blocks the oil passage (a). A plurality of 11 orifices α barrels for adjusting the flow rate are bored. In addition, (1'lJ (2IJl is a return spring, and υ is a moderation sensing device consisting of a steel ball and a coil spring.

Figure -53 also shows the front fork (2) in Figure 1.
) is a vertical front view showing ! 221 is an inner cylinder, (c) is an outer cylinder, and (b) is a seat pipe that is inserted and fixed into the outer cylinder (c) and slidably fitted into the inner cylinder 021, which is a piston member provided at its tip. It is. A spring (26) is installed between the closing member (c) of the inner cylinder (c) and the spring seat-shaped portion of the piston member at the tip of the seat vibe (2).
is mediated. In addition, a jack knit I-(B) is inserted and fixed into the upper part of the inner cylinder from above the inner cylinder (A), and a pipe holder whose upper end is fixed to the upper end of the jack knit (5) is inserted and fixed. The same unit (it is vertically installed with an annular gap inside the pipe η. Furthermore, the pipe 0 → a hollow rod with a larger diameter connects the upper end to the jacking unit 07)
It is inserted into the seat vibrator C24) with its lower end facing inside the seat vibrator C24), and three pistons 6υC are fixed to the upper and lower ends of the rond, respectively. Note that Oy is a cap that functions to restrict the downward movement of the piston C31 at the upper end of the rod (7), and also closes the lower end of the jack unit (27) to form an oil chamber (A3) below the piston. , and o4) is a member that closes the upper end of the hollow rod, and the pipe holder is slidably fitted on the outside. G9 is a
A sliding oil passage (e) is bored to communicate the oil passage (b) in the pipe (3) and the oil passage (d) in the pipe holder. In addition, since an oil hole (f) is drilled on the outer periphery of the hollow rod (g) facing the oil chamber (A3), the oil chamber (A2) of the first subtank (1) on the outside is connected to the oil passage. (a) (
b) (e) (d) and the front fork (
2) is communicated with the oil chamber (A3) inside.

On the other hand, there is a sliding body (36) inside the cylindrical side wall of the automatic housing.
By rotating the knob C37) which is rotatably fitted to the outside with a locking part on the inner ft&L, no-Ujifugu 0m end, the knob (sliding body 08 screwed to 3n) moves in the left-right direction in the figure. It is supposed to move to . The sliding body (
When 3e moves to the left, the guide ball (48) that closes the oil passage in the sliding body (36) moves to the right by being pushed by the bottle floating in the oil passage. It is designed to move and open the oil passage, and the hydraulic oil flows to the right.In addition, (4G is activated during the opening operation) llYll (is installed in the oil passage to flow to the left). The right side of the oil passage in the sliding body 06) is connected to the outside via the oil passage (31) in the pipe (5).
It is connected to the oil chamber (B2) of Subukunku (4). In addition, the left side of the 131 oil passages (3G) in the same drawing are the 7 oil passages (hl) installed in 5) of the no-using, and the jacking unit (
2'0 upper end σ-) l#-+ 'g5 Since it is connected to the oil chamber (B3) in the front 7 meter (2) through the oil hole (g) drilled in part 1, Up&, ? 1h I!
(B 2 ) and the oil chamber (B3) are in communication.

Four methods for adjusting the vehicle height in the apparatus having the above configuration will be described below.

When setting the front fork (2) before starting the motorcycle, use the lever σ of the first subtank (1).
Pull Q upward to unlock the lock member (13). At the same time, the knob G' of the front fork (2)
l) to move the sliding body (36) to the left, if
(Move the ball (Hg to the right to open the oil passage. Upper n self thread work 1 saf.

By filling gas from the valve 00) of the tank (1), the pressure inside the gas filling M (AI) becomes high, and the piston
ゝ□(9) is pressurized and slides to the right ++
2p, the hydraulic oil in the B11 chamber (A2) is connected to the oil path (al, speed ° control, orifice for adjusting the flow value of the le valve (17) +li, γ mountain path (b) (C) (d) (e),
The oil flows into the oil passage (A3) in the front fork (2) by sequentially following the oil holes (f). Therefore, the inside of the oil chamber (A3) is pressurized, and the closing member Cl4) and the piston G are pressed upward, and the upper rod 00) is connected to the integral K pipe (J'1). j,, Relatively compress the spring 0Q and shorten the stroke of the front fork (2).At this time, oil ♀ (B3) and the same hydraulic oil are pumped through the oil hole (g), the oil path (hl, and the sliding body i'). , i[if the oil passage is Il+α order,
11I] Oil chamber (B 2 ) of the second sub-tank (4)
flow inside. After that, the oil passage (a) is closed at the tip of the locking member θ by returning the pressure < -+te, and the oil passage (a) is closed at the tip of the locking member θ.
10) is opened to bring the inside of the gas-filled chamber (A1) to atmospheric pressure. Also, rotate the knob t: 37) in the opposite direction to rotate the sliding body (
:4j:) (2nd sub-tank (4)
Gas filling - gas is filled into the (old) tank from the valve ('I). By keeping the front fork in a compressed state in this way, the front part of the two-wheeled motorbike moves normally. It will be in a lower state, and at the start of a race etc.
1 b) γ゛j is prevented.

? To extend the front fork (2) to the normal speed (2) and set it to the normal (16J) position, first
pull upward. Then, the lock member (31) moves to the right to release the lock and the oil passage (a) becomes a lung. Therefore, the hydraulic oil in the oil chamber (A3) flows through the hole (f) due to the reaction force of the spring lever Q. ), oil passage (e) (dl (c) (tel,
It passes through the flow rate adjustment orifice 09 and the oil passage (a) in order and returns to the oil chamber (A2). At this time, the flow rate is adjusted by the diameter of the orifice 08), and the time from when the lever (18) is pulled to when the stroke is set during normal running (Q) can be adjusted. In addition, the hydraulic oil in the oil chamber (B2) opens the check valve (41) and returns to the oil chamber (B3) through the oil passage (h> and the oil hole (g).Rg oil chamber (B3) The hydraulic oil that has returned to the inside lowers the piston (3I) by 4IIl and comes into contact with the cap (3S), resulting in a locked state.This lock is held by the spring (4i), and the spring pressure is equal to the damping force. The pressure is set to be higher than the reaction force of the hollow rod (to) caused by the generation, and the chamber (B3) is in a closed state, but due to the pressure > ) to the right to open the oil bh, and the expansion of the oil due to the temperature rise flows into the oil chamber (B2), so the oil supply performance (
There is no such thing as rice in China.

According to this invention, by keeping the front fork in a compressed state in advance as described above, the front part of the motorcycle is lower than when driving normally, so the front wheel is prevented from floating at the start of a race, etc. . In addition, the mechanism can be released simply by externally operating a lever, etc., and it quickly extends to the normal driving stroke.
Furthermore, the 'AU' can also be adjusted using a speed control valve, etc., which is very useful.

[Brief explanation of the drawing]

Fig. 1 is a partially vertical plan view showing an outline of an embodiment of the present invention, Fig. 2 is a longitudinal front view showing the first sub-tank in Fig. 1, and Fig. 3 shows the front fork in Fig. 1. FIG.
3, 5, 29... Pipe, 4... Second sub-tank, 6.9, 31.32... Piston, 7.8, 10.11... Valve, 13... Lock part s, 16...Lever, 17.
・・Speed control pulp, 18・・Orin chair for 1st rotation adjustment, 22・・Inner tube, 23・・Outer tube, 24・・
・Seat pipe, 26... Spring, 27... Jacket unit, 30... Hollow rod, 33... Cap, 35...
・Housing, 36...Sliding body, 37...Knob, 38...Ball, 39...Bin,
40...Check valve, 41...Spring,
AI, Bl...Gas filled chamber, A2. A3. B2. B
3... Oil chamber, a, b, c, d, e, h, i --- Oil path, f, g.
...Oil hole. Patent applicant β1] Wa Seisakusho Co., Ltd. Honda Motor Co., Ltd. Kinuta 2 Figure 1 Australia, Figure 3 "-□-" Voluntary procedure amendment May 22, 1980 Patent Act 5'1 Director General Yoshiwakasugi Waten Forked Flag 1, Incident Display 1982 (”Patent Application No. 99125
No. 2, Name of issuer RII Front fork vehicle height adjustment device 4, Agent 8, Contents of amendment As shown in the attached document Amendment No. 58-99125 1, Specification page 3, lines 5 to 7 " There was a road surface.The -1 was corrected to ``The footing was poor, the acceleration performance was also reduced, and depending on the road surface conditions, there were cases where race times were adversely affected.'' Patent applicant: Honda Motor Co., Ltd. Showa Seisakusho Co., Ltd.

Claims (1)

[Claims] Fit the outer cylinder and the inside so that they can move freely, and slide the tip of the sheet pipe planted from the bottom of the nuclear outer cylinder into the inner cylinder.
In a front fork that fits freely and has a spring interposed between the tip of the seat pipe and the upper end of the inner cylinder, the upper part of the upper part of the inner cylinder is located from the upper part of the inner cylinder to the inner peripheral side of the spring. The jacking unit inserted and fixed, and the upper end of the jacking unit attached to the upper end of the jacking unit, p', +iμ, were vertically installed in the same unit with a round monkey-shaped space f, :%. A pipe, a piston with a larger diameter than the pipe and provided at its upper end is fitted into a jack unit, and a piston provided at its lower end is slidably fitted into a Tffl fir seat vibe. Under the original rod and the piston at the upper end of the hollow rod.
The lower end of the jack unit is
i: A cap that forms an oil chamber below the piston, and a first oil chamber provided outside the front fork that passes from the oil chamber below the piston in the jack unit through a hollow rod and a nozzle. An oil passage disposed up to the oil chamber in the saflink, an oil passage disposed up to the oil chamber above the piston in the jack unit, or an oil chamber in the second sub-tank provided outside the front fork; Consisting of a gas-filled chamber that is provided in the link and that makes the internal pressure of each oil chamber variable, a leno (-) that can freely open and close the oil passage, and a check valve provided in the oil passage. A front fork height adjustment device featuring: