JPH0361184A - Auxiliary wheel for two wheeler - Google Patents

Abstract

PURPOSE:To obviate the necessity to constantly ground a foot at the time of a stop, etc., by upward moving stand arms supporting auxiliary wheels so as to be housed when a vehicle has a given speed or more. CONSTITUTION:When a vehicle has a given speed or below, oil pressure entering a spool valve cylinder 31 from an oiling port 30 is lowered, spring force is surpassed, and a spool valve 32 is moved upward by a return spring 33 with oil returning from a center fine hole 32b. The supply passages 31c and 31b of the oil are communicated by means of the groove hole 32c of the lower side of the spool valve 32. Moreover, the groove 32c is communicated to the center hole 32c of the lower part of the spool valve 32. Consequently, a piston 14 is extruded forward within a cylinder 13 with a return spring 40, and also a pull rod 12, RL joint bar 9, and stand arms 2 and 2' lowers downward by the return force of stand springs 4 and 4' to ground auxiliary wheels 1 and 1'. As a result, the foot grounding can be obviated at the time of a stop, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an auxiliary wheel for a two-wheeled vehicle. , (Prior Art) Conventionally, a side stand or a main stand has been provided to prevent a motorcycle from falling over when the motorcycle has stopped, and the motorcycle can be stopped by swinging the side stand or the main stand after the rider gets off the motorcycle. ing.

Apart from such stands, motorcycles are equipped with auxiliary wheels operated by electric motors that automatically raise and lower so that the rider does not have to touch the ground from the motorcycle at any time for safety when stopping temporarily while riding. is disclosed in Japanese Utility Model Application Publication No. 58-8682.

(Problem to be Solved by the Invention) The above-mentioned motorcycle with automatic elevating auxiliary wheels uses a motor to raise and lower the auxiliary wheels according to the running speed, and performs a foot contact motion to prevent falling when starting or stopping. However, this method requires a dedicated electric motor, making the device complex and large, resulting in high costs.

The present invention has been made to solve the above problems, and its purpose is to provide a simple device,
To provide an auxiliary wheel for a two-wheeled vehicle that automatically lifts the auxiliary wheel to the ground or storage position depending on the vehicle speed, so that the rider does not need to keep his/her feet in contact with the ground all the time.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention has provided that the left and right stand arms, which rotatably support the left and right auxiliary wheels, are attached to a shaft that rotatably supports the left and right auxiliary wheels. A member is provided that biases both of the auxiliary wheels to ground through the vehicle, a detection device is provided that detects when the vehicle speed reaches a predetermined value, and when the predetermined value is reached, the stand arm is moved to the storage position. It is characterized by being equipped with a hydraulic actuator for lifting.

It is also recommended that an oil pump is provided on a shaft that rotates in conjunction with the axle, and that the hydraulic actuator is operated by hydraulic pressure supplied from the oil pump.

(Function) With the above configuration, when the vehicle speed falls below a predetermined value, the auxiliary wheels automatically touch the ground, and when the vehicle speed exceeds a predetermined value, the stand arm is lifted to the stowed position. The stand arm is held in the storage position while the motorcycle is running, and the stand arm can be automatically lowered and raised in conjunction with stopping and starting the two-wheeled vehicle. Moreover, since the stand arm can be lowered by a biasing member, the structure can be simplified.

(Example) Hereinafter, the present invention will be explained in detail with reference to the drawings.

1 and 2 are a cross-sectional view and a side view showing an embodiment of the main parts of the auxiliary wheel for a two-wheeled vehicle according to the present invention, and FIGS. The side and rear views, Figures 5 and 6, show the state in which it is installed.
FIG. 1 is a cross-sectional view showing the operating state of the actuator, FIG. 7 is a cross-sectional view showing the installation state of the oil pump that supplies hydraulic pressure to the actuator, and FIGS. 8 and 9 are the same as shown in FIG. 1. An explanatory diagram showing an embodiment of the spool valve operating device, FIGS. 10 and 11 are sectional views showing other embodiments of the spool valve operating device shown in FIG. 1, and FIG. 12 is an oil bypass circuit. FIG.

In Figures 1 to 4, 1, 1' are left and right auxiliary wheels, 2,
2' is the left and right stand arm.
Vehicle body cover and floor indicated by two-dot chain lines in the figures and Figure 4.
are provided below the steering wheel and below the seat. There is a support pipe 3a on the frame 3.3' below the front of the floor.
.

3a' is welded.

The auxiliary wheels 1, 1' are rotatably provided on support shafts 1a, La', and the support shafts 1a, la' are attached to the tips of left and right stand arms 2, 2', respectively. The stand arms 2, 2' have support pipes 2a, 2 at their bases.
a' is welded. The support pipes 2a and 2a' are fitted and fixed to the support pipes 5a and 5a', respectively, and the support pipes 5a and 5a' are connected to the stand springs 4 and 4.
The support pipe 5 is fitted rotatably into both ends of the support pipe 5 for the frame 3.3', and the support pipe 5 is fitted into and fixed to the support pipes 3a, 3a' welded to the frame 3.3'.

Inside the support pipe 5, stand springs 4 and 4' having coil-like torsional elasticity are provided on the left and right sides, respectively, and stand springs 4 and 4' are provided at the center of the support pipe 5, respectively.
．． One end of 4' is fixed, and stand springs 4, 4'
The other ends are respectively locked to one ends of support pipes 5a and 5a' fitted to swing the stand arms 2 and 2'.

The stand springs 4,4' apply torsional elastic force in the Z direction in the figure, which is the direction in which the stand arms 2, 2' and the auxiliary wheels 1, 1' are pressed against the ground, respectively. The torsion spring force of this stand spring 4゜4' is applied to the left and right auxiliary wheels 1, 1.
By pushing the 200 ft.' into the ground, it has sufficient elasticity to prevent the scooter from tipping over and to maintain the scooter in an upright position.

Furthermore, the following mechanism is provided to ensure that the left and right auxiliary wheels 1, 1' are pressed against the ground.

The stand arms 2 and 2' are shown in Fig. 1 and Fig. 2, respectively.
The sides are bent by press molding into the shape shown in the figure,
A ratchet wheel 6.6', ratchet pawls 7, 7', a ratchet spring 8.8', etc. are accommodated within the side wall.

The ratchet pawls 7, 7' are connected to the stand arm 2, respectively.
Collar 2b, 2b' welded near the root part of 2'
A shaft 7a is rotatably supported on the shaft 7a.

One end is pivoted to 7a', and the tip is a ratchet wheel 6.
．． The stand arm 2.2' is provided at a position where it bites into the tooth 6' and prevents the stand arm 2.2' from swinging in the direction opposite to Z in the figure. The ratchet pawls 7, 7' are always pressed by ratchet springs 8, 8' in the direction of the teeth of the ratchet wheel 6, 6'. Ratchet wheel 6.6'
The shape of the teeth prevents the stand arms 2, 2' from swinging upward in the direction opposite to the Z direction when the ratchet pawl 77' is engaged, and conversely prevents the stand arms 2, 2' from swinging in the Z direction. A plurality of serrations are formed, with one tooth surface being gentle and the other tooth surface being steeply sloped so that the ratchet pawls 7, 7' can pass over the tips of the teeth when moving.

Ratchet wheels 6, 6' respectively support pipe 3
a, 3a' are welded at right angles.

First, the auxiliary wheels 1° 1' when the scooter stops will be explained.

Due to the ratchet mechanism as described above, when the scooter is stopped or at extremely low speed on the verge of stopping, even if the auxiliary wheel 1°1' attempts to swing in the opposite direction from the position where it touches the ground, the ratchet claw 7° 7' is the ratchet wheel 6.6'
Since the auxiliary wheels 1, 1' are engaged with the teeth of the scooter, the auxiliary wheels 1, 1' maintain the scooter in a grounded state to prevent it from falling over.

That is, the stand springs 4, 4' are at that time
, 1' to the ground, and the training wheels 1
, 1' prevent the scooter from tipping over because it does not swing in the direction opposite to the upper Z direction due to a ratchet mechanism.

Furthermore, even when the scooter is stopped on a sloped or uneven surface, the auxiliary wheels 1, 1' are stopped at positions where the left and right wheels touch the ground separately, thereby preventing the vehicle from falling over. In Figure 4,
When the scooter stops on the slope shown by the two-dot chain line, the auxiliary wheels 1 and 1' are positioned at the locking teeth of the ratchet mechanism, as described above, so that the swing angle of the stand arms 2 and 2' is slightly reduced. The difference is that it is located at a height along a slope.

Next, a description will be given of when the scooter reaches the above speed or higher.

The stand arms 2 and 2' each have a collar 2c that pivotally supports both ends of the RL joint par 9.

2c' is support pipe 2a, 2a' and collar 2b,
The stand arms 2, 2' are lifted up by the RL joint par 9, which is welded between the collars 2b' and 2b' and whose both ends are pivotally supported in the elongated holes of the collars 2c and 2c'. A spherical bulge 9a is formed in the center of the RL joint par 9, and a ball joint 10 with a spherical inner surface and divided into upper and lower halves is rotatably attached to the bulge 9a of the RL joint par 9. mated.

A hole 9b passing through the bulge 9a of the RL joint par 9 and the center of the spherical surface of the ball joint io is provided, and the hole 9b
Insert the bolt 11 into the hole, and the bolt 11 connects the two upper and lower ball joints 10 to the bulge 9 of the RL joint par 9.
It is tightened so that it can rotate freely by holding a.

The ball joint 10 is provided with a pull rod 12 having a male thread at its tip that engages with a female thread bored in a protrusion provided at one end.

Further, the diameter of the hole 9b at the center of the spherical surface of the RL joint par 9 is made larger than the diameter of the bolt 11, and within the range where the bolt 11 interferes within this hole, the left and right stand arms 1, 1'
The swing angles of the two are slightly different.

The pull rod 12 is connected to a hydraulic cylinder 13 and a piston 14.
coupled to a hydraulic actuator consisting of. The hydraulic cylinder 13 is provided with holes for guiding the pull rod 12 in the cylinder heads at both ends thereof, and is further provided with an oil seal 15.1B for preventing oil leakage.

The hydraulic cylinder 13 has a support arm 7 formed behind the pull rod 12, and the support arm 17 is swingably supported on a support shaft 19 inserted through a bracket 18 welded to the frame 3.

Next, a device for supplying hydraulic pressure into the hydraulic cylinder 13 will be explained.

FIG. 7 is a sectional view showing a state in which an oil pump is attached to a mechanism portion of this scooter that drives the rear axle from the engine through the transmission mechanism.

Rotational output from the engine is transmitted to the pulley 20 by the V-belt, and the pulley 20 further transmits the rotational force to the primary
The rotational force is transmitted to the driven shaft 21 , and the rotational force is transmitted from the primary driven shaft 21 to the axle shaft 22 after being decelerated by a gear mechanism.

An oil pump 23 is provided at the end of the primary driven shaft 21, and the oil pump 23 is composed of a housing 24, a casing 25, an outer rotor 26, and an inner rotor 27.

When the primary driven shaft 21 rotates, the inner rotor 27 rotates, and at this time, the oil inlet 28
The oil supplied from the loader is sequentially supplied from the suction port 25a.
Meanwhile, the oil is supplied to the oil inlet 30 of the hydraulic cylinder 13 via the discharge boat 25b and the oil outlet 29.

The hydraulic cylinder 13 has a spool valve cylinder 31
are integrally formed, and a spool valve 32 is provided inside the spool valve cylinder 3 so as to be pushed by a return spring 33 and slidably move between stopper rings 34 and 35.

When oil enters from the oil inlet 30, hydraulic pressure is supplied from the upper passage 31a to the upper end of the spool valve 32, and the spool valve 32 pushes the return spring 33 and lowers to the position shown in FIG. upper tj
32a communicates the oil supply paths 31b and 31c. At that time, the spool valve 232 comes into contact with the stopper ring 35 and stops at a position where the groove 32a communicates the supply paths 31b and 31c.

On the other hand, oil is supplied from the oil inlet 30 to the supply path 31b1 and the groove 32a1.
is supplied into the hydraulic cylinder 13 via the supply path 31c,
As a result, the piston 14 is depressed and pulled back together with the pull rod 12. At that time, the oil at the rear of the piston 14 is sent from the hole 36 to the reservoir chamber 37 in the direction of the arrow shown in FIG.
The oil is then circulated through the discharge pipe 39 to the oil suction port 28 of the oil pump 23.

Next, the piston 14 has its rear end at the position of the return spring 40 +JII
It contacts the stopper ring 41 against the force.

Further, the return spring 40 pushes the piston 14 forward when oil pressure is no longer supplied.

Through this process, the piston 14 moves backward, and the pull rod I2 is pulled backward as shown in FIGS. 1 and 2, and the R
L joint top par 9 is drawn.

As shown in Fig. 2, both ends of the RL joint par 9 are located in front of the elongated holes of the collars 2c and 2c' provided on the stand arm 2゜2' before being pulled. Ratchet pawl 7°7' is ratchet wheel 6
．． It is designed to mesh with the 6' teeth. Next, when the RL joint par 9 is pulled as described above, both ends of the RL joint par 9 are pulled up to the rear inside the elongated holes of the collars 2c and 2c', and at this time, the ratchet pawls 7 and 7
' is pulled up, disengaged from the ratchet wheel 6.6', and moved to the position shown by the two-dot chain line in FIG.

Next, when the RL joint par 9 is pulled further rearward, the stand arms 2, 2' are moved upward and the auxiliary wheels 1, 1' are lifted to the storage position, so that they do not interfere with the running of the scooter. Of course, this operation is performed on the left and right wheels almost simultaneously.

Although there may be some time lag in the movement of the left and right ratchet pawls 7, 7', etc., the Pli of the stand spring 4.4'
Due to the force, the left and right stand arms 2.2' are automatically balanced symmetrically and lifted simultaneously.

The timing of lifting at this time is determined by the balance between the discharge pressure of the oil pump 23 and the strength of the stand spring 44' piston (return spring 40 of 4, return spring 33 of the spool valve 32, etc.).The strength of each spring is On the other hand, the discharge pressure of the oil pump 23 increases as the vehicle speed increases, that is, the engine speed increases, regardless of the vehicle speed, so when a predetermined vehicle speed is reached, the oil pressure automatically increases against the elastic force of the spring, etc. A detecting device is constructed which will lift the auxiliary wheels 1, 1'.

FIG. 5 shows a state in which the piston 14 is located at the rear end as described above, and at this time, the auxiliary wheel 1.1' is lifted to the retracted position shown by the upper dashed double-dashed line in FIG.

This state is maintained while the scooter is traveling.

However, since the oil pump 23 continues to supply oil, during that time, the discharged oil is sent to the Ura supply pipe 42 and the discharge vibrator 39.
A bypass circuit 43 as shown in FIG. 12 is provided in the middle of the oil pump, and a regulator valve 44 is opened to continue returning oil in excess of the required amount to the suction side of the oil pump 23. Of course, regulator valve 4 at this time
The operating pressure of 4 is applied to the auxiliary wheels 1, 1' against the elastic forces of the stand spring 4.4', return spring 40, return spring 33, etc.
set to apply just enough pressure to keep it lifted upward.

The spool valve 32 has a small hole 32b formed on its central axis, and the small hole 32b allows the spool valve 32 to open when stopped, which will be described later.
This is to return the oil from the front of the spool valve 32 to make it easier for the spool valve 32 to move forward. Since the flow of oil from the pores 32b is minute, the oil pressure does not decrease. Since the oil pump 23 has a considerably higher speed than the rear wheels, a faster hydraulic pressure rise characteristic can be obtained relative to the vehicle speed.

When the scooter stops, when the vehicle speed falls below a predetermined value, the oil pressure decreases and the elastic force of each spring becomes stronger. The spool valve 32 returns upward in FIG. 6 by the return spring 33 while returning oil from the small hole 32b in its center, and in this position, the lower groove hole 32c provided in the spool valve 32 serves as an oil supply path. 31b and 31c are communicated with each other, and the slot 32
c is the lower center hole 32 provided in the spool valve 32.
It is connected to d.

As shown in FIG. 6, the oil in the cylinder 13 is supplied from the front of the piston 14 to the supply path 31c, the slot 32C1, and the center hole 3.
2d to the reservoir chamber 37, and further to the rear of the piston 14 through the hole 36.

The piston 14 is pushed forward in the cylinder 13 by the return spring 40, and the sol rod 12, RL joint par 9, and stand arm 2゜2' descend downward due to the torsional elastic force of the stand springs 4 and 4', and the auxiliary wheel 1
．． 1' is grounded.

At this time, the ratchet pawls 7, 7' slide down on the tooth tips of the ratchet wheels 6, 6'. Training wheels 1,
When 1' comes into contact with the ground, ratchet pawls 7 and 7' stop,
At that position, the teeth of the ratchet wheel 6.6' will engage, so the scooter will not tip over.

A rubber ring is glued to the outer periphery of the auxiliary wheels 1 and 1', so
At extremely low speeds, the auxiliary wheels 1, 1' cushion the impact when the vehicle travels while remaining in contact with the ground.

In the above case, the timing of raising or lowering the auxiliary wheels 1, 1' is influenced by the hydraulic characteristics of the oil pump 23 and the accuracy of the operation of the spool valve 32.

Therefore, on scooters etc. with relatively low acceleration, the auxiliary wheel
, 1' are in contact with the ground, it is unlikely to cause any problems, but in large-displacement motorcycles, etc., a delay in lifting the auxiliary wheels 1, 1' may become a problem, so As a countermeasure, the following second embodiment will be explained.

As shown in FIG. 8, the spool valve 32 is actuated by a solenoid 45 connected to the spool valve 32. The ON/OFF operation of the solenoid 45 is controlled by the CPU 4.
This is carried out according to data predetermined by B. A signal input to the CPU 4B to detect the vehicle speed is generated by a pulser 47 provided on the primary driven shaft 21, as shown in FIG.

The pulser 47 includes a magnet 48 provided on the primary driven shaft 21 and a pulse coil 49 provided opposite to the magnet 48. The pulser 47 sends pulses generated in the pulse coil 49 by the passage of the magnet 48 to the CPU 4.
B, the number is counted in the CPU 46 to detect the speed, and when a predetermined value is reached, a current is sent from the power source to the solenoid 45 to turn the solenoid 45 on and off.

In this case, vehicle speed detection is extremely accurate, and the spool valve 32 can be operated quickly, so if the oil pump 23 has a sufficient capacity, the auxiliary wheels 1 and 1' can be operated accurately at a fairly low speed. be able to.

As a third embodiment for operating the spool valve 32,
There is a method using a mechanical governor shown in FIGS. 10 and 11.

In FIG. 11, a governor weight 50 is provided on the primary driven shaft 21, and a glue retainer 52 is provided to guide and rotate the governor unit 50, generate centrifugal force, and transmit the force to the governor lever 51. It is something that

When the rotation of the primary driven shaft 2I reaches a predetermined value, the centrifugal force of the governor weight 50 causes the governor lever 51 to rotate in the direction of the arrow and pull the inner part of the cable 53, so that the cable 53 is connected to the hydraulic cylinder shown in FIG. Turn the governor lever 54 on the 13 side and push the spool valve 32 to guide hydraulic pressure into the upper hydraulic cylinder 3. If the rotation of the primary-driven shaft 2↓ decreases, the governor lever 51 is moved by the governor spring 55.
The cable 53 returns in the direction opposite to the arrow shown in FIG.
The inner of is also returned, and the spool valve 32 is returned to
3 returns to the original state. The subsequent operations of the auxiliary wheels 1, 1', etc. are the same as in the previous two embodiments.

(Effects of the Invention) Since the present invention is as described above, the auxiliary wheels automatically touch the ground when the vehicle speed becomes less than a predetermined value, and the stand arm is retracted when the vehicle speed becomes more than a predetermined value. Since the stand arm is held in the retracted position while the motorcycle is running, the stand arm can be automatically lowered and raised in conjunction with stopping and starting the two-wheeled vehicle. Moreover, since the stand arm can be lowered by a biasing member, the structure can be simplified.

[Brief explanation of drawings]

1 and 2 are a cross-sectional view and a side view showing an embodiment of the main parts of the auxiliary wheel for a two-wheeled vehicle according to the present invention, and FIGS. The side and rear views, Figures 5 and 6, show the state in which it is installed.
FIG. 1 is a cross-sectional view showing the operating state of the actuator, FIG. 7 is a cross-sectional view showing the installation state of the oil pump that supplies hydraulic pressure to the actuator, and FIGS. 8 and 9 are the same as shown in FIG. 1. An explanatory diagram showing an embodiment of the spool valve operating device, FIGS. 10 and 11 are sectional views showing other embodiments of the spool valve operating device shown in FIG. 1, and FIG. 12 is an oil bypass circuit. FIG. 1.1'... Auxiliary wheel 2.2'... Stand arm 3.3'... Frame 4.4'... Stand spring 5... Support vibro, 6'... Ratchet wheel 7 .7'...Ratchet pawl 8.8'...Ratchet spring 9...RL joint bar 10...Ball joint 12...Pull rod 13...Hydraulic cylinder 14...Piston 17... Support arm (8... Bracket 19... Support shaft 21... Primary-driven shaft 23... Oil pump 30... Oil inlet 31... Spool valve cylinder 32... Spool valve 40... ... Return spring 37 ... Reserver chamber 38 ... Oil discharge port 43 ... Bypass circuit 45 ... Solenoid 47 ... Pulsar 50 ... Governor weight 54 ... Governor lever 52 ... Retainer 53... Cable 55... Governor spring

Claims (1)

[Scope of Claims] 1. Both the above-mentioned auxiliary wheels are grounded via both the above-mentioned stand arms on a shaft that swingably supports the left and right stand arms that rotatably support the left and right auxiliary wheels, respectively. The present invention is characterized in that it includes a biasing member, a detection device that detects when the vehicle speed reaches a predetermined value, and a hydraulic actuator that lifts the stand arm to a storage position when the vehicle speed reaches the predetermined value. Auxiliary wheels for motorcycles. 2. The auxiliary wheel for a two-wheeled vehicle according to claim 1, wherein an oil pump is provided on a shaft that rotates in conjunction with the axle, and the hydraulic actuator is operated by hydraulic pressure supplied from the oil pump.