JP2841562B2 - Hose connection device for vehicle height adjustment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a vehicle height adjusting device for a motorcycle, in which the length of a front suspension and a rear cushion unit are changed to increase the vehicle height. The present invention relates to a hose connecting device applied to a vehicle height adjusting device that adjusts a vehicle height.

(Prior Art) A vehicle height adjusting device that enables a rider to adjust the vehicle height of a motorcycle using a front suspension and a rear cushion unit is disclosed in Japanese Patent Application No. 1-38554. , But are generally not publicly available.

The vehicle height adjustment device described in the specification of Japanese Utility Model Application No. 1-38554 is provided between the front suspension and the vehicle height adjustment unit,
The front height adjustment unit and the rear cushion unit are connected by hydraulic hoses, and pressure oil is supplied or discharged from the vehicle height adjustment unit to the front suspension and the hydraulic jacks of the rear cushion unit through these hydraulic hoses. The height of the suspension is adjusted by changing the length of the suspension and rear cushion unit.

(Problems to be Solved by the Invention) By the way, in consideration of the assemblability when attaching the vehicle height adjusting device to the vehicle body frame, a hose that can be divided into two parts into a hydraulic hose that connects the front suspension and the vehicle height adjusting unit. An arrangement with a coupling device is conceivable. In this case, if the hose connecting device is arranged in front of the front suspension or behind the vehicle height adjusting unit, the layout of the hydraulic hose becomes complicated.

The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a hose connecting device of a vehicle height adjusting device capable of simplifying a hydraulic hose connected by the hose connecting device and shortening the hydraulic hose length.

[Configuration of the invention]

(Means for Solving the Problems) The present invention relates to a rear cushion unit provided with a hydraulic jack capable of adjusting the vehicle height, a front suspension provided with a hydraulic jack capable of adjusting the vehicle height, and the rear cushion unit. And a vehicle height adjustment unit having a hydraulic height control unit for transmitting hydraulic pressure of the internal pressure oil to the hydraulic jacks via a hydraulic hose, wherein the vehicle height adjustment unit is connected to the hydraulic jack of the front suspension. A hose connecting device is disposed on the hydraulic hose, and the hose connecting device is disposed behind the front suspension and in front of the vehicle height adjustment unit and in front of the vehicle. , A front fork side joint part and a vehicle height adjustment part side joint part that can be split from each other. A free piston that slides by the hydraulic pressure of the pressure oil is provided, and both free pistons abut on each other by a push rod in a connected state of the joints and are integrally linked, and further, the front fork side from the hose connection device. Is a branch of the hydraulic hose.

(Operation) Therefore, according to the hose connecting device of the vehicle height adjusting device according to the present invention, since the hose connecting device is disposed behind the front suspension and in front of the vehicle height adjusting unit,
Since the hydraulic hose connecting the front suspension and the vehicle height adjusting section can be laid out as linearly as possible, the layout of the hydraulic hose can be simplified and the hose length can be shortened.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is an overall side view of a motorcycle showing an arrangement position of an embodiment of a hose connecting device of a vehicle height adjusting device according to the present invention.

As shown in FIG. 1, a front fork 2 supporting a front wheel 1 is disposed in front of a vehicle body frame 3, and a rear wheel 5 supported by a rear suspension 4 is disposed behind the vehicle body frame 3. . A seat 6 is arranged above the vehicle body frame 3, and a rider straddles the seat 6 and operates by operating a steering wheel 7.

The front fork 2 is an inverted type front fork, and includes two left and right front suspensions 8 and 9. These front suspensions 8 and 9 consist of an upper bracket 10 and an under bracket
11 supports the vehicle body frame 3 via a steering shaft and a head pipe (not shown). These front suspensions 8, 9 absorb the impact from the front wheels 1 and attenuate the vibration.

The rear suspension 4 has a swing arm 13 pivotally supporting the rear wheel 5 and supported by the body frame 3 by a pivot 12, an upper end supported by the body frame 3, and a lower end via a link mechanism (not shown). And a rear cushion unit 14 supported by the swing arm 13. The rear cushion unit 14 absorbs the vertical swing of the swing arm 13 about the pivot 12 and attenuates the vibration, so that the impact on the rear wheel 5 is reduced.

Now, the front suspensions 8 and 9 and the rear cushion unit 14 have hydraulic jacks 42, 4 described later.
1 are formed, and a vehicle height adjusting unit 15 is arranged near the rear cushion unit 14. The hydraulic jacks 42 of the front suspensions 8 and 9 and the vehicle height adjusting section 15 are connected by a vehicle front side hydraulic hose 16, and the hydraulic jack 41 of the rear cushion unit 14 and the vehicle height adjusting section 15 are connected to the vehicle rear side hydraulic hose 17. To form a vehicle height adjusting device 18. And the vehicle front side hydraulic hose 16
A hose connecting device 19 is provided in the middle of the process.

In FIG. 1, reference numeral 20 denotes a front fender, and reference numeral 21 denotes a front fender.
Is a headlamp housing, 22 is a seat rail of the body frame 3, 23 is a stand, and 24 is an engine, and 25 is an exhaust pipe connected to the engine 24.

As shown in FIG. 3, the rear cushion unit 14
A coil spring 27 is arranged on the outer periphery of a rear oil damper 26. The rear oil damper 26 is provided with a coil spring 27 due to the resistance when the pressure oil filled in the cylinder 28 passes through the small hole of the piston 29 and the valve 29A.
Vibration is rapidly attenuated. This cylinder 28
The inside is connected to the oil chamber of the reserve tank 31 shown in FIG. 5 and FIG.
Communicating with 32, the amount of pressure oil in the cylinder 28 is adjusted. The inside of the reserve tank 31 is partitioned by the piston 33 into the oil chamber 32 and the air chamber.

The front suspensions 8, 9 shown in FIG.
An inner tube 35 supported on the wheel side of the front wheel 1,
The outer tube 36 includes a front oil damper. The front oil damper rapidly attenuates the vibration of the spring 37 disposed in the inner tube 35.

As shown in FIGS. 3 and 5, the vehicle height adjustment unit 15 of the vehicle height adjustment device 18 has a spool valve 39 rotatably disposed at a center position of the adjustment unit main body 38. The adjustment operation unit 40 shown in FIG. 6 is integrally connected. By rotating the adjustment operation section 40, the spool valve 39 is switched to the High side for increasing the vehicle height or to the Low side for decreasing the vehicle height.

That is, the spool valve 39 is operated by operating the adjustment operation section 40.
When switched to the high side, the swing of the swing arm 13 causes the piston 29 in the rear oil damper 26 shown in FIG. 3 to move up and down, and the pressure oil in the cylinder 28 is displaced by arrows A and B,
Further, the fluid flows as shown by arrows C and D shown in FIG. 5 and the arrow E shown in FIG. 3, and flows into the hydraulic jack 41 of the rear cushion unit 14 through the vehicle body rear side hydraulic hose 17 as shown by the arrow F. . Further, the pressure oil flowing in the vehicle height adjusting unit 15 as shown by the arrow E flows through the vehicle front side hydraulic hose 16 to the vehicle height adjusting unit side joint 62 of the hose connecting device 19 as shown by the arrow G. , The hydraulic pressure of this pressure oil
The power is transmitted to the hydraulic jacks 42 of the front suspensions 8 and 9 via the front fork-side joint 61 shown in the drawing.

In the hydraulic jack 41, as shown in FIG. 3, a jack piston 44 is arranged in a jack cylinder chamber 43, and the movement amount of the jack piston 44 is transmitted to a spring guide 46 via a spacer 45, and the spring 27 It changes the initial load. Therefore, when pressure oil flows from the vehicle height adjustment unit 15 into the jack cylinder chamber 43 of the hydraulic jack 41, the jack piston 44 moves and pushes down the spring guide 46, so that the rear cushion unit 14 is extended to increase the vehicle height. .

As shown in FIG. 4, the hydraulic jacks 42 of the front suspensions 8 and 9
A jack piston 48 is arranged in a jack cylinder chamber 47 installed therein, and the amount of movement of the jack piston 48 is transmitted to a spring guide 52 via a plunger 49, a ring 50 and a spacer 51. The two vehicle front-side hydraulic hoses 16 are connected to the fork caps 52A of the left and right front suspensions, respectively, and pressurize the pressure oil in the vehicle front-side hydraulic hoses 16 into the jack cylinder chamber.
Lead into 47. Therefore, when the hydraulic pressure of the pressure oil is transmitted to the hydraulic jack 42 via the hose connecting device 19, the jack piston 48 moves downward, and the spring guide 52 pushes down the spring 37 to increase the initial load of the spring 37, The front suspensions 8 and 9 extend to increase the vehicle height.

When the vehicle height is to be lowered, the spool valve 39 is switched to the Low side by rotating the adjustment operation unit 40. Then, due to the weight of the vehicle, the pressure oil in the hydraulic jack 41 (see FIG. 3) of the rear cushion unit 14 passes through the vehicle rear-side hydraulic hose 17 and the oil passage of the vehicle height adjustment unit 15 and the oil in the reserve tank 31 Return to room 32. Further, the pressure oil in the hydraulic jacks 42 (see FIG. 4) of the front suspensions 8 and 9 returns to the front fork side joint 61 of the hose connecting device 19 due to the weight of the vehicle, and thereby the vehicle height adjustment unit side joint The pressure oil in the section 62 returns to the oil chamber 32 of the reserve tank 31 via the vehicle height adjusting section 15. Thus, the initial loads of the coil spring 27 of the rear cushion unit 14 and the springs 37 of the front suspensions 8 and 9 are reduced, and the rear cushion unit 14 and the front suspensions 8 and 9 are contracted, and the vehicle height is reduced.

In addition, a first blow valve 53 and a second blow valve 54 are arranged in the adjusting section main body 38 as shown in FIG.
The first blow valve 53 is configured such that a piston 55 is urged by a spring 56. This first blow valve 53
When the pressure oil flowing from the rear oil damper 26 through the connection hose 30 (see FIG. 3) becomes higher than a predetermined pressure when the spool valve 39 is switched to the high side, the piston 55 responds to the urging force of the spring 56. As a result, a part of the pressure oil is discharged into the oil chamber 32 of the reserve tank 31 as shown by an arrow H.

Further, the second blow valve 54 is such that a ball 57 is loosely fitted to a push piece 58, and a spring 60 is disposed between the push piece 58 and a spring guide 59. Screwed into 38.
When the vehicle jumps while the vehicle is running with the spool valve 39 switched to the High side, the hydraulic jack 41 of the rear cushion unit 14 and the hydraulic jack 4 of the front suspensions 8, 9
When the oil pressure of the pressure oil in 2 rises, the ball 57 moves against the urging force of the spring 60, and the hydraulic hose 16
Then, the pressure oil in the vehicle rear side hydraulic hose 17 is returned into the oil chamber 32 of the reserve tank 31 as shown by the arrow I. This prevents the hydraulic hoses 16 and 17 from being damaged.

The hose connecting device 19 provided on the hydraulic hose 16 is connected to the front fork side joint 61 and the vehicle height adjusting unit side joint 62 as shown in FIGS. Be composed.

The front fork side joint portion 61 is provided with a free piston 64 slidably disposed in a cylinder 63.
The hose connecting portion 65 is fixed to one end of the hose. The cylinder 63 is filled with pressure oil, and two hydraulic hoses 16 on the front side of the vehicle are connected to the hose connecting portion 65.
Are connected to the hydraulic jacks 42 of the front suspensions 8 and 9 respectively. An oil seal 66 is mounted on the outer periphery of the free piston 64 to prevent pressure oil from leaking. Also, a push rod 67A is attached to the free piston 64,
It is provided to protrude outward.

Further, an outer cylinder 67 is loosely fitted around the outer periphery of the cylinder 63.
The position of the outer cylinder 67 in the longitudinal direction of the cylinder 63 is regulated by a ring 68 fixed to the cylinder 63. Also,
A female screw 69 is engraved on the inner periphery of the distal end side of the outer cylinder 67.

On the other hand, the vehicle height adjustment section side joint section 62 is also configured in the same manner as the front fork side joint section 61, a free piston 71 is provided in the cylinder 70, and a hose connection section 72 is fixed to an end of the cylinder 70. One vehicle front side hydraulic hose 16 is connected to the hose connecting portion 72, and the vehicle front side hydraulic hose 16 is connected to the vehicle height adjusting section 15. Free piston
An oil seal 73 is also attached to 71. Also, cylinder 70
An outer cylinder 74 is loosely fitted around the outer periphery of the outer cylinder 74. The position of the outer cylinder 74 is regulated by a ring 75, and a male screw 76 is engraved at the tip.

A wrench (not shown) is fitted to the nut portions 77 and 78 of the outer cylinders 67 and 74, and the female screw 69 of the front fork side joint portion 61 and the male screw 76 of the vehicle height adjustment portion side joint portion 62 are joined. By the front fork side joint
61 and the vehicle height adjusting portion side joint portion 62 are combined. In this connection state, the push rod 67A of the front fork side joint 61 abuts on the free piston 71 of the vehicle height adjustment section side joint 62, and both free pistons 64 and 71
Are integrally linked by a bush rod 67A. The upper half and the lower half of FIG.
71 shows left and right movement respectively.

Such a hose connecting device 19 is disposed behind the front suspensions 8 and 9 and in front of the vehicle height adjusting unit 15 as shown in FIG. And the hose connection device
19 is attached to the vehicle body frame 3 by an attachment bracket 79, as shown in FIGS. Code 80
Is an engine suspension plate, and the engine suspension plate 80 and the mounting bracket 79 are fastened together to the vehicle body frame 3 by bolts 81. A sub-bracket 82 is fixed to the mounting bracket 79 with bolts 83, and the hose connecting device 19 is held between the mounting bracket 79 and the sub-bracket 82.

According to the above embodiment, when traveling on uneven terrain,
By rotating the adjustment operation section 40 of the vehicle height adjustment section 15 to switch the spool valve 39 to the high side, the hydraulic jack 41 of the rear cushion unit 14 and the hydraulic jacks 42 of the front suspension units 8 and 9 are supplied to the rear cushion. The pressure oil in the unit 14 is pumped through the vehicle height adjusting unit 15 to extend the lengths of the rear cushion unit 14 and the front suspension units 8 and 9 to increase the vehicle height and increase the road clearance. When traveling in an urban area or the like, the spool valve 39 of the vehicle height adjustment unit 15 is switched to the low side to eliminate the pressure oil in the hydraulic jacks 41 and 42, and the length of the rear cushion unit 14 and the length of the front suspension units 8 and 9 are reduced. The height can be shortened, the vehicle height can be reduced, and the legging performance can be improved.

Also, the hose connecting device 19 is used for the front suspension 2
Of the vehicle front side hydraulic hose 16 connecting the front suspension 2 and the vehicle height adjustment unit 15 to the position as straight as possible along the body frame 3 because the front suspension 2 and the vehicle height adjustment unit 15 are arranged behind the vehicle. This hydraulic hose can be laid out
The layout of 16 can be simplified and the hose length can be shortened.
As a result, the degree of freedom in the layout of the vehicle front side hydraulic hose 16 is increased, the cost can be reduced, and a decrease in efficiency due to expansion of the hydraulic hose 16 can be reduced.

〔The invention's effect〕

As described above, in the hose connecting device of the vehicle height adjusting device according to the present invention, the hose connecting device is disposed on the hydraulic hose that connects the vehicle height adjusting unit and the hydraulic jack of the front suspension, and the hose connecting device is provided. The device is arranged behind the front suspension and in front of the vehicle height adjustment unit and in front of the vehicle, while the hose connecting device is configured to have a front fork-side joint part and a vehicle height adjustment unit side that can be separated from each other. The joint structure consists of a joint part, so a hose connecting device that can be divided into two parts is provided on the hydraulic hose to improve the degree of freedom in mounting the hose connecting device and improve the assemblability of the vehicle height adjustment device to the body frame. In addition, since the hose connection device is disposed behind the front suspension, in front of the vehicle height adjustment unit, and in front of the vehicle, the hose connection device is substantially linear. You can adopt a layout structure of a pressure hose, hydraulic hose length to simplify the layout of the hydraulic hoses can be shortened.

In addition, the hose connecting device is provided with a free piston that slides by hydraulic pressure of pressure oil in the front fork side joint portion and the vehicle height adjustment portion side joint portion that can be divided from each other, and both free joints are connected in a joint state of both joint portions. Since the pistons abut each other by the push rods and are integrally linked, and the hydraulic hose on the front fork side is branched by the hose connecting device, hydraulic oil flows out of the hydraulic hose even if the hose connecting device is divided and disconnected. If the front fork side joint part and the vehicle height adjustment part side joint part are divided at the time of mounting the vehicle height adjustment device, the fork cap to which the hydraulic hose is connected can be The upper bracket can be set in place without removing it from the fork, improving the assemblability and improving Sometimes, it is not necessary to remove the fork cap when assembling the vehicle height adjusting device, and the pressure oil in the front suspension does not flow out, so that the fluctuation of the oil amount of the pressure oil in the front suspension or the intrusion of foreign matter does not occur. And so on.

[Brief description of the drawings]

FIG. 1 is an overall side view of a motorcycle showing an arrangement position of an embodiment of a hose connecting device of a vehicle height adjusting device according to the present invention, and FIG. 2 is a sectional view taken along line II-II of FIG. , FIG. 3 is a cross-sectional view showing the rear cushion unit and the vehicle height adjusting section and the like of FIG. 1, FIG. 4 is a cross-sectional view showing the front suspension and the like of FIG. 1, and FIG. FIG. 6 is a sectional view taken along the line VI of FIG. 3, and FIG. 7 is a sectional view of the hose connection device of FIG. 2 ... Front fork, 8,9 ... Front suspension, 10 ... Upper bracket, 14 ... Rear cushion unit, 15 ... Vehicle height adjustment unit, 16 ... Vehicle front side hydraulic hose, 18 ... Vehicle height adjustment Equipment, 19 …… Hose coupling device, 29
…… Spool valve, 40 …… Adjustment operation part, 41,42 …… Hydraulic jack, 61 …… Front fork side joint part,
62 …… Height adjustment part side joint part, 79 …… Mounting bracket.

Claims (1)

(57) [Claims] 1. A rear cushion unit having a hydraulic jack capable of adjusting the vehicle height, a front suspension having a hydraulic jack capable of adjusting the vehicle height, and a hydraulic pressure of the pressure oil in the rear cushion unit being hydraulically controlled. In a vehicle height adjusting device having a vehicle height adjusting portion capable of transmitting to both hydraulic jacks via a hose, a hose connecting device is connected to the hydraulic hose connecting the vehicle height adjusting portion and a hydraulic jack of the front suspension. The hose connection device is disposed behind the front suspension and in front of the vehicle height adjustment unit and in front of the vehicle, while the hose connection device is a front fork-side joint that can be separated from each other. Part and a vehicle height adjustment part side joint part, and slides in both joint parts by the hydraulic pressure of the pressure oil. Lee piston is disposed, respectively,
In the vehicle height adjusting device, the two free pistons abut each other by a push rod in the coupled state of the two joint portions and are integrally linked, and a hydraulic hose on the front fork side is branched from the hose connecting device. Hose coupling device.