JPS635312B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stand device used when parking a motorcycle.

Generally, this type of stand device has a pair of left and right legs, and the base ends of these legs are pivotally connected to the frame via a rotation axis extending in the left-right direction so as to be rotatable in the front-back direction. There is.

Such stand devices are installed at or near the center of gravity of the vehicle in order to increase the stability of the parked motorcycle.For this reason, the stand device is installed near the bottom of the engine crankcase. This is what we are doing.

By the way, in the case of this stand device, the stability of the vehicle body during parking will be improved if the distance between the legs is widened and the contact area with the ground is expanded in the left and right directions of the vehicle body. If this is done, when the legs are flipped up backwards and retracted, the ground-contacting parts of the legs will protrude outward from the vehicle body and crankcase.

For this reason, in a motorcycle in which a hard crank for starting the engine is pivotally mounted on one side of the engine crankcase so that it can rotate vertically, when the legs are retracted as described above, the hard crank side If the leg comes within the range of the rotation locus of the hard crank and the foot is stepped down on the hard crank with the leg retracted, there is a possibility that the foot will come into contact with the ground contact portion of the leg.

Therefore, the present invention not only improves the stability of the vehicle body while parking, but also prevents the leg on the hard crank side from protruding to the side when the leg is retracted. The purpose of the present invention is to provide a motorcycle stand device that can be operated safely and reliably.

Therefore, in the present invention, a starting crank that rotates in the vertical direction is provided on one side of the crankcase of the engine mounted on the frame, and a rotating shaft that extends in the horizontal direction is provided near the bottom of the crankcase. The base end of the main stand, which has a pair of left and right legs, is pivoted so as to be rotatable in the front and back direction, and when the main stand is rotated backward and stored, the leg on the hard crank side Assuming that the part is located within the range of the turning locus of the above-mentioned hard crank, one end of the above-mentioned turning shaft on the hard crank side is located rearward than the other end on the opposite side. It is characterized by being installed obliquely in the direction.

According to this configuration, the rotation axis, which is the center of rotation of the legs of the main stand, is tilted in the above direction, so that when the legs are rotated backward, the legs on the hard crank side As it approaches the retracted position, it enters toward the frame center side, moving away from the rotation locus of the hard crank. For this reason, even if the distance between the legs is set wide, the leg on the hard crank side will not protrude much outward, and even if you step down on the hard crank with the main stand retracted, your foot will not move. It can prevent contact with the legs.

Furthermore, when the main stand is rotated forward from the storage position toward the use position, the legs on the hard crank side protrude outward from the storage position due to the inclination of the rotation axis, and these pairs of legs Since the legs touch the ground in a well-balanced manner, the distance between the legs can be widened, and the stability of the parked two-wheeled motor vehicle can be further improved.

The present invention will be described below based on an embodiment shown in the drawings.

FIG. 1 shows a two-wheeled motor vehicle, and numeral 1 indicates an underbone type frame. This frame 1 is constructed by connecting a head pipe 2 with a pair of left and right main pipes 3, 3, and an engine 4 is suspended below the frame 1. In Fig. 1, numeral 5 is a front fork, 6 is a steering wheel, and 7 is a front fork.
8 indicates a seat, and 8 indicates a driving wheel.

Further, a crank 14 for starting the engine is arranged on one side of the crank case 9 of the engine 4. The hard crank 14 has its base end connected to a hard shaft 14a led out from one side of the crank case 9.
It is adapted to be rotated in the vertical direction on the side of the crankcase 9 with the rotation center a as the center of rotation.

In this embodiment, this crankcase 9
A stand device 10 used for parking is attached to the lower part of the vehicle. The details of this stand device 10 will be explained with reference to FIG. 3. A center bracket fixed to the lower surface of the crankcase 9 includes a pair of support pieces 12, 12 facing each other and spaced apart from each other in the left-right direction of the crankcase 9. A rotating shaft 13 is rotatably inserted between these support pieces 12, 12 via a spacer tube 25. As shown in FIG.
3b so that its axis is located rearward.
O ₁ −O ₁ is the reference line O ₂ along the vehicle width direction (left and right direction)
_-O2 It is arranged to be inclined at a predetermined angle α, and this inclination angle α is preferably set to 5° to 15°.

A main stand 16 is connected to the pivot shaft 13 tilted in this way via a bracket 15. The main stand 16 includes a pair of left and right leg portions 17a and 17b. Legs 17a, 1
Flat grounding parts 18a and 18b which are bent in opposite directions and extend in the left-right direction of the vehicle body are formed at the tip of the crank 14.
The full length of the side leg portion 17a is longer than the full length of the other leg portion 17b due to the inclination of the rotation shaft 13. Further, the bracket 15 has leg portions 17a, 17
It has curved parts 19, 19 that wrap around the outer peripheral surface of b,
The peripheral edges of these curved portions 19, 19 are the leg portions 17a,
It is welded to the outer peripheral surface of 17b. bending section 19,
Rotation shaft connection pieces 20, 20 are continuously provided on one end side of 19, and these rotation shaft connection pieces 20,
Both ends of the rotating shaft 13 are fixed to 20.

Therefore, the main stand 16 is arranged below the crankcase 9 and rotates in the front-back direction integrally with the rotation shaft 13, and the main stand 16 is rotated as shown in FIGS. 2 and 3. When the legs 17a and 17b are rotated rearward toward the storage position where they are approximately horizontal, the hard crank 14
The tip of the side grounding part 18a is connected to the hard crank 14.
The center line passing through the frame center than the rotation trajectory K of
It is positioned at a distance l ₁ toward the O ₃ −O ₃ side. As shown by the imaginary lines in FIGS. 2 and 3, when the main stand 16 is rotated from the storage position to the use position where the legs 17a and 17b stand up, the ground contact portion 18a
protrudes a distance l to the side of the vehicle body from the retracted position, and these grounding portions 18a and 18b touch the ground at positions balanced in the left-right direction with respect to the center line _O3 - _O3, as shown by the imaginary lines in FIG. It's getting old.

Further, pins 21, 21 are provided protruding from the outer surfaces of the support piece 12 and leg portion 17a on the side of the hard crank 14, and between these pins 21, 21, the main stand 16 is stored in the direction of arrow A. A tension coil spring 22 is tensioned to rotate in the direction.

Furthermore, numerals 23 and 24 refer to main stand 1.
This is a stopper for regulating the rotation range of 6.

According to the embodiment of the present invention configured in this way, the rotation shaft 13 of the main stand 16 is arranged with an inclination in the above direction, so that the main stand 16
When rotated toward the storage position, the grounding part 18a of the leg 17a on the side of the hard crank 14 moves away from the rotation trajectory K of the hard crank 14 toward the frame center side (inside) as it approaches the storage position. It will move towards. Therefore, even if the distance between the legs 17a and 17b is increased, when the main stand 16 is retracted, the leg 17a on the hard crank 14 side will not protrude much laterally, and the main stand 16 will remain retracted. Even if the user steps down on the hard crank 14 in this state, it becomes difficult for the foot to come into contact with the leg portion 17a or its ground contact portion 18a. Therefore, the key operation can be performed safely and reliably.

Moreover, when the main stand 16 is rotated to the use position, the leg 1 on the hard crank 14 side
7a protrudes outward from the storage position, and the left and right grounding portions 18a, 18b can be grounded at positions that are balanced left and right with respect to the center line _O3 - _O3 passing through the frame center.

Therefore, together with the widening of the distance between the legs 17a and 17b, there is an advantage that the safety of the parked motorcycle is further improved.

Note that the stand device of the present invention is not limited to those used in motorcycles with underbone type frames as shown in the above embodiments, but can also be applied to, for example, diamond type or cradle type frame types. It is. For this reason, this stand device is not limited to being attached directly to the crankcase of the engine, but may be attached to a frame such as a down tube, for example.

According to the present invention described in detail above, when the main stand is retracted, the leg on the hard crank side enters into the frame center side, so even if the hard crank is stepped down when the main stand is retracted, the foot comes into contact with the leg. You can prevent this from happening. Therefore, it is possible to carry out the kick operation safely and reliably, and it is also possible to widen the distance between the left and right legs, which has the advantage of further increasing the stability of the parked two-wheeled motor vehicle.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a side view of a two-wheeled motor vehicle, Fig. 2 is a side view of a stand device, and Fig. 3 is a view taken along the line - in Fig. 2. . 1... Frame, 4... Engine, 9... Crank case, 13... Rotating shaft, 14... Hard crank, 16... Main stand, 17a, 17
b...legs.

Claims (1)

[Claims] 1. A starting crank that rotates vertically is provided on one side of the crankcase of the engine mounted on the frame, and a crankcase that rotates horizontally extends near the bottom of the crankcase. The base end of the main stand, which has a pair of left and right legs, is pivoted through a shaft so that it can rotate in the front and back direction, and when the main stand is rotated backwards and stored, its hard crank side In a two-wheeled motor vehicle whose legs are located within the range of the rotation locus of the hard crank, the rotation axis is in a direction in which one end on the hard crank side is located rearward than the other end on the opposite side. A stand device for a two-wheeled motor vehicle, characterized in that it is provided at an angle.