JPH0647393B2 - Standing up device for motorcycles - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a stand-up assisting device for a motorcycle, that is, a drive device for a stand for raising and lowering a stand of the motorcycle, and a rear stand of a large motorcycle. It is effective when used as a stand for supporting the wheels in a floating state.

[Conventional technology]

To park the motorcycle, hold the part of the vehicle body and lift it by stepping on the stepping stand. There is no particular inconvenience for a lightweight motorcycle, but since a large motorcycle is heavy, it is not easy to stand up the stand. In order to facilitate the stand-up operation of the stand, an electric motor is used to raise and lower the stand by using power (Japanese Patent Laid-Open No. 49-31038), and one using a fluid pressure cylinder (Japanese Patent Laid-Open No. 48-48). No. 77548). In this way, with respect to the one using the stand-up assisting device for the stand-up operation of the stand, the stand-up assisting device should be as small and lightweight as possible, its operating force should be stable, and its durability should be great. desired. The latter is superior to the former in responding to this request. The latter conventional motorcycle stand-up assisting device (hereinafter referred to as "conventional technology") directly drives the stand by a fluid pressure cylinder attached to the lower frame of the vehicle body to stand up.
Although the drive mechanism is simple and it excels in stability and durability of operation, the fluid pressure cylinder is located behind the standing stand and pushes it forward to stand up, so the rear wheel is levitated. It cannot be applied as it is to the standing stand, and the stroke length of the fluid pressure cylinder is large, so the fluid pressure cylinder becomes large for the amount of standing operation force of the standing stand, and its weight is large. There is still a problem that the space occupied by the standing assistance device is not small.

[Problems to be Solved by the Present Invention]

The present invention provides a drive mechanism for a standing stand by a fluid pressure cylinder so as to reduce the stroke and diameter of the fluid pressure cylinder to reduce the weight thereof as much as possible, for the one in which the standing stand is undulated by the fluid pressure cylinder. The task is to devise.

[Means taken to solve the problem]

The measures taken to solve the above problems are as follows:
(D).

(A) The standing stand is pivotally supported on the vehicle body lower frame on the rear wheel side from the center of the vehicle body lower frame, and the cylinder head of the fluid pressure cylinder is pivotally supported on the vehicle body lower frame on the front wheel side from the pivot point of the standing stand. (B) The piston rod of the fluid pressure cylinder is rotatably connected to the standing stand near the grounding plate, and (c) the standing stand is folded toward the rear of the vehicle body by the extension of the fluid pressure cylinder, and the piston rod of the fluid pressure cylinder when folded. The pivot point of the cylinder head to the lower frame of the vehicle body and the pivot point of the upright stand to the lower frame of the vehicle body are set so that and the standing stand are folded almost parallel to each other. The switch is operated by opening and closing the switch, and the switch is provided on the tread surface of the standing stand. And switch, with upright stand by depressing the tread is rotated, the fluid pressure cylinder the operation switch is closed is adapted to operate.

[Work]

The fluid pressure cylinder extends and the standing stand is folded rearward of the vehicle body, the piston rod is almost parallel to the standing stand, the standing stand is folded along the lower frame of the vehicle body, and is held in this folded state (7th
(See A'in the figure).

In this folded state, since the fluid pressure cylinder and the standing stand are almost parallel, the holding of the standing stand in the folded state is stable, and the vibration in the expansion and contraction direction of the piston rod due to the vertical vibration is small, Little wear on the moving surface.

When you step on the standing stand, the control valve is switched by the operation switch provided on the tread of the standing stand,
The fluid pressure cylinder contracts. When the fluid pressure cylinder starts contracting, the standing stand is stepped on and is no longer parallel to the fluid pressure cylinder, so the contraction of the fluid pressure cylinder causes the standing stand to rotate smoothly forward of the vehicle body. The grounding plate touches the ground and pushes up the vehicle body, and supports the vehicle body in a state where the vehicle body is inclined obliquely forward (see A in FIG. 7).

Since the standing stand is pulled up by the contraction operation of the fluid pressure cylinder located in front of the standing stand that is folded to the rear of the vehicle body, the standing stand can be operated by a thin piston rod (extension of the piston rod). In the case of the prior art in which the stand is erected by (see B in FIG. 7), the piston rod and the cylinder body must be relatively thick in order to secure sufficient buckling strength of the piston rod). When the ground plate touches the ground and pushes up the vehicle body, that is, when the operating force of the fluid pressure cylinder is maximum, the piston rod is closest to the retracted state, and therefore the deflection of the piston rod due to the weight of the fluid pressure cylinder is the smallest. Therefore, the operation of the fluid pressure cylinder at this time is extremely It is smooth.

Furthermore, the contraction operation of the fluid pressure cylinder located in front of the standing stand that is folded to the rear of the vehicle body pulls the standing stand to stand it up, and when the folding is performed, the piston rod of the fluid cylinder and the standing stand are folded almost parallel to each other. Since the pivot point of the vehicle to the vehicle body and the pivot point of the standing stand to the lower frame of the vehicle body are determined, compared with the conventional one (see B ′ in FIG. 7),
The cylinder stroke is short (see A'in FIG. 7), and therefore, the length of the fluid pressure cylinder can be significantly shortened.

Since the piston rod can be made thin and the length of the fluid pressure cylinder can be shortened, the size of the fluid pressure cylinder can be remarkably reduced and the weight thereof can be remarkably reduced as compared with the conventional one.

Furthermore, by folding the piston rod and the upright stand almost parallel to each other in the folded state, and by shortening the length of the fluid pressure cylinder, the fluid pressure when folded and stored along the lower frame of the vehicle body Since the space occupied by the cylinder and the standing stand is small, and the distance between the pivot point of the cylinder head on the lower frame of the vehicle body and the pivot point of the standing stand on the vehicle body can be reduced, the standing assistance device can be provided. It can be compactly installed on the lower frame of the vehicle body (A in Fig. 7,
See A ', B, B').

〔Example〕

Next, an embodiment will be described with reference to FIGS. 1 to 7.

An upper end of a stand body 5 of the standing stand 4 is pivotally attached to the rear wheel side from the center of the body frame by a pivot shaft 6.
This is to facilitate the maintenance such as adjusting the looseness of the drive chain and removing the rear wheel when the rear wheel 2 is floated (the front wheel 1 is in contact with the ground) when the standing stand is erected to support the vehicle body.

The standing stand 4 has a ground plate 7 at the lower end of a stand body 5, and a foot arm 8 is fixed to the lower end of the stand body 5 in a direction substantially at a right angle. A foot switch 8a that is closed by stepping on the tread surface of the foot arm 8 is provided.
Further, both ends of the spring 13 are connected between the stand body 5 and the vehicle body, and the spring 13 urges the standing stand 4 in the vehicle body direction, that is, in the direction to rotate in the housing direction, and holds it in the housed position.

The cylinder head of the fluid pressure cylinder 9 is pivotally attached to the vehicle body lower frame by a pivot shaft 10, and the piston rod 9
The pin a is pivotally attached to the stand body 5 in the vicinity of the ground plate 7 by the pin 12. The pivot point of the fluid pressure cylinder 9 to the lower frame of the vehicle body is located in front of the vehicle body with respect to the pivot point of the main body of the stand to the lower frame of the vehicle body. Line L in FIG.
(See above).

When the standing stand is folded and stored in a state of being substantially along the lower frame of the vehicle body, the fluid pressure cylinder 9 is most extended, and its piston rod is folded over the stand body. When the tread surface of the foot arm 8 is depressed and pushed down, the foot switch 8a is closed, the solenoid valve for controlling the fluid pressure cylinder is switched, and the supply pipe communicating with the working chamber on the piston rod side of the fluid pressure cylinder. Compressed air is supplied from 11 to contract the fluid pressure cylinder 9. As a result, the standing stand 4 is rotated downward (clockwise) against the spring 13, the ground plate 7 is grounded, and is rotated to a position slightly inclined forward while pushing up the vehicle body. This state is the standing position, but at this time, the solenoid valve is switched and the supply pipe 11 is opened to the atmosphere. When the vehicle body is pushed forward and the standing stand is rotated slightly rearward to bring the rear wheels into contact with the ground, the standing stand is rotated by the spring 13 toward the storage position. At this time, since the fluid pressure cylinder is extended, the air in the piston rod side chamber of the fluid pressure cylinder is forcedly exhausted, and this exhaust resistance acts as a control force for the folding operation by the spring 13, so that the folding operation is made gentle. .

When folded and stored, the cylinder head of the fluid pressure cylinder 9 is pivotally supported on the lower frame of the vehicle body, the pivotal shaft 6 is connected to the lower frame of the stand body, the piston rod and the pin 12 of the stand body are the lower frame of the vehicle body. Is located substantially on a horizontal virtual straight line L substantially along the
The stand body 5 is held above the lower surface of the vehicle body lower frame. Therefore, the fluid pressure cylinder 9 does not collide with an obstacle on the road surface and be damaged during traveling.

The above control of the fluid pressure cylinder can be performed by the following control device.

A relief valve 17 and an electromagnetic switching valve 16 are connected to the air pump 15, and the air pump 15 is connected via the electromagnetic switching valve 16.
The supply pipe 11 is connected to. The supply pipe 11 is selectively connected to the atmosphere and the air pump 15 by an electromagnetic switching valve 16.

A normally closed type limit switch 18 that detects when the standing stand reaches the standing position is connected in series to the foot switch 8a, and the solenoid 16s and the relay coil 19 of the electromagnetic switching valve connected in parallel with each other are the limit. Switch 1
8 in series. Also, the foot switch 8a,
A normally open relay switch 19a that is closed by energizing the relay coil 19 and a drive motor 15a of the air pump are connected in parallel to the limit switch 18, the relay coil 19, and the solenoid 16s.

When the foot switch 8a of the standing stand 4 is stepped on and closed, the relay coil 19 is energized, the normally open relay switch 19a is closed, and the drive motor 15a is activated. At this time, the solenoid switching valve 16 in parallel with the relay coil 19
Is switched to connect the supply pipe 11 to the air pump, the fluid pressure cylinder 9 contracts, and the standing stand 4 is rotated downward (clockwise direction). When the standing stand reaches the standing position, the limit switch 18 opens, so that the relay coil 19 is de-energized and the relay switch 19a
Opens and the drive motor 15a stops. At the same time, the electromagnetic switching valve 16 is switched to connect the supply pipe 11 to the atmosphere.

The fluid pressure cylinder 9 in the above-described embodiment is a so-called single-acting fluid pressure cylinder that operates by supplying and exhausting air to and from the piston rod side working chamber, but the piston rod side working chamber and the cylinder head side working chamber are alternately arranged. An embodiment in the case of using a so-called double-acting fluid pressure cylinder that operates by supplying and exhausting air will be described with reference to FIGS. 5 and 6.

In the example shown in FIG. 5, the fluid pressure cylinder 9 is connected to the cylinder head side working chamber and the piston rod side working chamber in the air pump 20 via the check valve 21 and the four-way electromagnetic switching valve 22. The supply and discharge of air to and from the cylinder head side working chamber and the piston rod side working chamber of the fluid pressure cylinder 9 are alternately switched.

The example shown in FIG. 6 is a four-way electromagnetic switching valve 22 of the example shown in FIG.
Instead, two three-way valves 22a and 22b are combined to perform air supply / discharge control similar to the four-way electromagnetic switching valve 22. When the double-acting hydraulic cylinder is used, the folding operation of the standing stand is also performed by the hydraulic cylinder, so that the spring 13 for returning in the first embodiment is not necessary, and the returning operation is performed by the hydraulic cylinder. However, it is disadvantageous from the viewpoint of simplifying the structure of the fluid pressure cylinder, electromagnetic switching valve, and control circuit. When the working fluid is used as the working oil, it cannot be removed by a double-acting fluid pressure cylinder.

The total length of the fluid pressure cylinder 9 is determined by the stroke of the piston rod 9a required to move the standing stand 4 from the folded and stored position to the standing position. In the prior art, since the piston rod is in the most extended state in the vicinity of the end of the standing motion, the working stroke becomes longer and, as a result, the stretching stroke of the piston rod becomes longer.However, the standing stand by the fluid pressure cylinder located in front of the standing stand. In the one in which the piston rod is pulled up to the upright position, the piston rod is in the shortest position near the end of the upright motion, and in the stored state, the fluid pressure cylinder and the upright stand are substantially parallel to the lower frame of the vehicle body, and the piston rod and the upright stand are Since it can be held in a folded state, and the rotation angle of the fluid pressure cylinder at the time of standing operation becomes large, the standing stand can be rotated greatly with a short extension stroke. The extension stroke can be shortened. As a result, the total length of the fluid pressure cylinder 9 can be significantly shortened and the weight thereof can be reduced. Reference numeral 3 is an engine.

〔The invention's effect〕

An invention that solves the above-mentioned problems of the present invention is not yet known. Therefore, the solution to this novel problem and the solution to the above-mentioned problems of the prior art is an effect peculiar to the present invention.

That is, the stroke of the fluid pressure cylinder that drives the upright stand can be shortened, the overall length of the fluid pressure cylinder can be significantly shortened, and the piston rod can be made thin, so that the fluid pressure cylinder can be made compact and lightweight. .

In addition, by folding the piston rod and the upright stand almost parallel to each other in the folded state and shortening the length of the fluid pressure cylinder, the fluid pressure when folded and stored along the lower frame of the vehicle body The space occupied by the cylinder and the stand is small, and
Since the distance between the pivot point of the cylinder head on the vehicle body and the pivot point of the standing stand on the vehicle body can be reduced, the standing assistance device can be compactly installed on the vehicle body.

Further, as with the normal stand-up operation of the stand, by depressing the tread surface of the stand, the stand-up assist device is activated to strongly stand up the stand, so no special operation is required and no It is possible to easily and easily stand up the standing stand of a large motorcycle without any discomfort as in the conventional case.

Further, since the standing stand is pivotally attached to the rear wheel side from the center of the body of the large motorcycle and the body is pushed up, the rear wheel is lifted and the rear wheel can be easily maintained. In other words, it is not a new effect to facilitate the maintenance of the rear wheels by raising the rear wheels of the motorcycle, but in large motorcycles, it is practically impossible to lift the rear wheels by a standing stand. However, according to the present invention, the rear wheel of the large motorcycle can be easily and easily lifted and lifted up, and thus the rear wheel of the large motorcycle can be easily and easily maintained. Is the effect of.

Further, the fluid pressure cylinder and the standing stand can be housed along the vehicle body lower frame so as to be substantially parallel to the vehicle body lower frame so that the lower surface thereof is above the lower surface of the vehicle body lower frame. Protects the hydraulic cylinder and the stand against road surface obstructions so that they do not hit and damage road obstructions.

[Brief description of drawings]

FIG. 1 is a side view of a motorcycle to which the present invention is applied, FIG. 2 is an enlarged side view of the standing up assisting device in FIG. 1, FIG. 3 is a pneumatic circuit diagram of the standing up assisting device in FIG. 1, and FIG. Is an electric control circuit diagram of the pneumatic circuit of FIG. 3, FIGS. 5 and 6 are conceptual diagrams of another embodiment of the control circuit of the fluid pressure cylinder, and FIG. 7 is an explanatory diagram of the operation of the present invention. 4 ... Standing stand, 6 ... Pivot shaft, 7 ... Grounding plate, 8
...... Foot arm, 8a ...... Foot switch, 9 ...... Fluid pressure cylinder, 9a ...... Piston rod, 10 ...... Pivot shaft,
12 ... pin, 13 ... spring.

Claims (1)

[Claims] 1. A standing assistance device for a motorcycle, wherein a standing stand and a fluid pressure cylinder are pivotally mounted to a lower frame of a vehicle body, a piston rod of the fluid pressure cylinder is connected to the standing stand, and the standing stand is raised by the fluid pressure cylinder. , The standing stand is pivotally supported on the lower body frame at the rear wheel side from the center of the lower body frame, and the cylinder head of the fluid pressure cylinder is pivotally supported on the lower body frame at the front wheel side from the pivot point of the standing stand. The piston rod is rotatably connected to the standing stand in the vicinity of the ground plate, and the standing stand is folded toward the rear of the vehicle by the extension of the fluid pressure cylinder, and when folding, the piston rod of the fluid pressure cylinder and the standing stand are folded substantially parallel to each other. The cylinder head to the lower frame of the vehicle body Determine the pivot point of the tongue to the lower frame of the vehicle body, switch the control valve of the fluid pressure cylinder by opening and closing the switch, and use the switch as the operation switch provided on the tread of the standing stand and step on the tread. As a result, the standing stand is rotated, and at the same time, the operation switch is closed so that the fluid pressure cylinder is operated.