JPH05238441A - Stand uprighting device for motorcycle - Google Patents

Abstract

PURPOSE:To store a main stand compact without taking a large space in the longitudinal direction, while using a motor-driven mechanism and preventing the main stand from standing out at the time of storage. CONSTITUTION:On a motorcycle with a main stand 6 on the lower part of a body frame 2 free to change over to an upright position and to a storage position, the main stand 6 is constituted of a pair of right and left horizontal support legs 6a, these support legs 6a are respectively engaged with a pair of right and left guide cylinders 2a integrated with the body frame 2 respectively free to slide in the vertical direction, racks 7 are respectively formed on a pair of the right and left support legs 6a and pinions 8 are respectively engaged with these racks 7. A worm wheel 9 is fixed on a connection axis 8a to connect both of these pinions 8 to each other, and a worm 10 connected to an electric motor 11 is engaged with the worm wheel 9 in a stand uprighting device for the motorcycle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stand up apparatus for a motorcycle, which erects a main stand using an electric motor.

[0002]

2. Description of the Related Art In order to reduce the labor required to stand a main stand of a motorcycle, a stand stand-up device that uses an electric motor is known (for example, Japanese Utility Model Laid-Open No. 55-95).
987 and Japanese Utility Model Laid-Open No. 56-127076). However, all of these conventional stand upright devices have a structure in which the supporting legs of the stand are pivotally bent in the front-back direction (mainly to the rear side). It was necessary to secure a sufficient space for rotating it in the front-back direction. As a result, there has been a problem that the axial distance between the front and rear wheels must be increased and the minimum ground clearance of the vehicle body must be increased.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stand stand for a motorcycle, which is electrically operated, does not occupy a space in the front-rear direction, and can be stored compactly so that the main stand does not stand out when stored. To provide.

[0004]

The present invention for achieving the above object provides the following two inventions. A first aspect of the present invention is a motorcycle in which a main stand is attached to a lower portion of a vehicle body frame so as to be switchable between an upright position and a storage position, and the main stand is composed of a pair of left and right horizontally supporting legs and supports these. The legs are slidably fitted in a pair of left and right guide tubes integral with the vehicle body frame in the vertical direction, racks are formed on the pair of left and right support legs, and pinions are meshed with the racks. A worm wheel is fixed to a connecting shaft that connects both pinions, and the worm connected to the electric motor is meshed with the worm wheel.

A second aspect of the present invention is a motorcycle in which a main stand is attached to a lower portion of a vehicle body frame so as to be switchable between a standing position and a storage position, and the main stand is composed of a pair of left and right supporting legs that are horizontally placed. At the same time, these supporting legs are composed of a pair of upper and lower pairs of upper leg and lower leg to form a pantograph mechanism which is vertically expandable and contractible, and is attached to each upper leg between the left and right upper legs. It is characterized in that a screw shaft is screwed through so as to straddle both of the nut members, and the screw shaft is interlocked with the electric motor.

In each of the two inventions, the main stand is composed of a pair of left and right supporting legs that are horizontally placed, and these supporting legs are vertically retracted or expanded or contracted so as not to rotate in the front-rear direction. Therefore, when switching the main stand between the standing position and the storage position, no space is occupied in the front-rear direction. In addition, the main stand can be made almost invisible when stored. Further, since the worm and the worm wheel are provided in the drive system in the first invention, and the nut member and the screw shaft are provided in the drive system in the second invention, these can also be used as a lock mechanism. Further, in the case of the second invention, since the screw shaft for driving is interposed between the left and right upper legs, the pantograph mechanism is extended at a high speed at the start of the standing operation, and a large force is exerted at the time of touchdown. As the vehicle body is slowly lifted up, a quick standing operation is possible.

[0007]

The present invention will be described below with reference to the illustrated embodiments. In FIG. 1, a motorcycle 1 has an engine 3 mounted in an intermediate portion of a body frame 2, and front and rear wheels 4 and 5
Supported by and. Below the body frame 2,
A main stand 6 is provided between the rear portion of the engine 3 and the rear wheel 5 to allow the vehicle body to stand on its own.

FIG. 2 shows an embodiment of the standing device of the main stand 6. In FIG. 2, the main stand 6 has a pair of left and right support legs 6a, 6a that are horizontally placed,
And they are connected to each other by the rod 6b. The pair of left and right support legs 6a, 6a are fitted to the pair of left and right guide tubes 2a, 2a extending from the vehicle body frame 2, respectively, and are vertically slidable. The guide tube 2a has a structure in which a part of the frame material forming the vehicle body frame 2 is also used.

A rack 7 is engraved on the front side surface of each of the support legs 6a, 6a. The pinions 8 and 8 mesh with the racks 7 and 7, and the left and right pinions 8 and 8 are connected shafts 8a supported on the vehicle body frame 2 side.
Are connected to each other by. A worm wheel 9 is fixed to an intermediate portion of the connecting shaft 8a, a worm 10 is meshed with the worm wheel 9, and the worm 10 is driven by an electric motor 11 fixed to the body frame 2 side. ..

In the stand upright device of FIG. 2 described above, by rotating the electric motor 11, the support legs 6a, 6a can be alternately raised and retracted between the lower upright position and the upper storage position. The worm 10 rotates the worm wheel 9 by the rotation of the electric motor 11, and the connecting shaft 8a causes the pinions 8 and 8 to rotate.
To rotate the support legs 6a,
6a is moved up and down. When performing such an operation,
It is possible to prevent the supporting legs and the like from rotating in the front-rear direction to occupy a space, and to make the main stand almost invisible when stored.

In the above operation, the support legs 6a, 6a
When a reaches the lower standing end or the upper storage end, the energization is automatically cut off and the electric motor 11 is stopped. In this stopped state, the worm 10 and the worm car 9
Since the reverse action is prevented by the meshing action of, the main stand 6 is not lowered by the load of the vehicle body or an external force such as vibration.

FIG. 3 shows a stand raising device according to another embodiment of the present invention. In FIG. 3, the main stand 6 has a mounting plate 12 to be mounted on the lower portion of the vehicle body frame 2 and a grounding tread plate 13 arranged vertically, and a pair of left and right supporting plates between the mounting plate 12 and the tread plate 13. Leg 6
A and 6a are connected. Moreover, these support legs 6a, 6a are respectively composed of an upper leg 6au and a lower leg 6ad.
The whole is made into a retractable pantograph mechanism consisting of parallelogram links. When the main stand 6 is attached to the vehicle body frame 2, the mounting plate 12 and the tread plate 13 are arranged in the vehicle width direction, and the supporting legs 6 are provided.
By arranging a and 6a on the left and right, they are oriented laterally.

In the above pantograph mechanism, a nut member 14 is rotatably pivoted on each of the left and right upper legs 6au, and a screw shaft 15 is penetrated and screwed between the nut members 14 and 14. .. The electric motor 11 is connected to one end of the screw shaft 15, and the electric motor 11 is connected to the upper leg 6
It is rotatably supported by a bracket 16 provided on one side of au.

Both ends of the nut members 14, 14 and the screw shaft 15 screwed into the nut members 14 are provided so that the screw twisting directions are opposite to each other, whereby the screw shaft 15 rotates when the screw shaft 15 rotates. The nut members 14 and 14 are adapted to screw in opposite directions. Also, the upper leg 6
As shown in FIG. 4, gear pieces 17 are press-molded at the upper end of the au and the lower end of the lower leg 6ad, respectively, and by engaging them with each other, the phase shift between the mounting plate 12 and the step plate 13 is prevented. I am trying. However, the gear pieces 17 do not necessarily have to be provided on both the upper and lower ends, and may be provided on only one of the ends.

In the stand upright device shown in FIG. 3, the electric motor 11 is used.
When the screw shaft 15 is rotated by rotating the nut member 1, the nut member 1
The left and right upper legs 6 au, 6 au move in opposite directions via 4, 4. Since the tilt angle between the upper leg 6au and the lower leg 6ad changes in accordance with this movement, the pantograph mechanism expands and contracts in the vertical direction to raise and lower the footboard 13. Then, when the footboard 13 is lowered and grounded, the vehicle body is lifted to be in an independent state, and when the footboard 13 is raised, it is placed in a lower portion of the vehicle body frame 2.
When performing these operations, the support leg does not occupy a space by rotating in the front-rear direction, and the main stand can be made almost invisible when stored. Also,
When the electric motor 11 is stopped, the screw shaft 15 and the nut member 14 interact with each other to prevent reverse rotation.
Is prevented from moving up and down due to external forces such as vehicle load and vibration.

[0016]

As described above, in the stand erection device according to the present invention, the main stand is composed of a pair of left and right supporting legs that are horizontally placed, and these supporting legs extend and retract in the up and down direction to extend and retract in the front and back direction. Does not rotate, so it does not occupy space in the front-back direction. In addition, the main stand can be made almost invisible when stored. Further, since the drive system is provided with the worm and the worm wheel, or the nut member and the screw shaft, they can also be used as a lock mechanism.

[Brief description of drawings]

FIG. 1 is a side view of a motorcycle equipped with a stand upright device of the present invention.

FIG. 2 is an external view showing an enlarged main part of the stand upright device according to the present invention.

FIG. 3 is an external view of a stand upright device showing another embodiment of the present invention.

FIG. 4 is a vertical cross-sectional view illustrating a main part of the device shown in FIG.

[Explanation of symbols]

2 Body frame 2a Guide tube
6 Main stand 6a Support leg 6au Upper leg
6ad Lower leg 7 Rack 8 Pinion
8a Connection shaft 9 Worm wheel 10 Worm
11 electric motor 12 mounting plate 13 tread plate
14 Nut member 15 Screw shaft

Claims (2)

[Claims] 1. In a motorcycle in which a main stand is attached to a lower portion of a vehicle body frame so as to be switchable between an upright position and a storage position, the main stand is composed of a pair of left and right horizontally supporting legs, and these supporting legs are provided. The pair of left and right guide cylinders integral with the vehicle body frame are slidably fitted in the vertical direction, racks are formed on the pair of left and right support legs, and pinions are meshed with the racks. A stand upright device for a motorcycle, in which a worm wheel is fixed to a connecting shaft that connects the worm and a worm connected to an electric motor is meshed with the worm wheel. 2. A motorcycle in which a main stand is attached to a lower portion of a vehicle body frame so as to be switchable between an upright position and a storage position, and the main stand is composed of a pair of left and right horizontally supporting legs, and these supporting legs are provided. Each of them is composed of a pair of upper and lower legs and an upper leg and a lower leg to constitute a pantograph mechanism which is vertically expandable and contractable, and straddles both of the nut members attached to the upper legs between the left and right upper legs. A stand up stand for a motorcycle in which a screw shaft is screwed through so that it twists, and the screw shaft is linked to an electric motor.