JPH01311970A - Stand erecting device for motorcycle - Google Patents

Abstract

PURPOSE:To eliminate the need of large physical strength at the time of parking and to reduce the size of the construction of the device by fitting a hydraulic cylinder on a fixed shaft and oscillating and erecting a main stand stay by rotation of the hydraulic cylinder. CONSTITUTION:A main stand stay 5 is supported on a fixed shaft 11 in such a manner as to freely oscillate by one pair of right and left stand base plates 6 integral with the base portion of the stay. A hydraulic cylinder 18, a valve storing block 19 and an operating rotary plate 30 are fitted on the fixed shaft 11. The interior of the hydraulic cylinder 19 is partitioned into chambers A, A, B, B by partition walls 11a, 18a. Accordingly, the oscillation of the main stand stay 5 is conducted by putting pressure oil through a port 13 a port 21 a valve chest 20 a communicating path 23 into both chambers A of the hydraulic cylinder 18. According to the present invention, the degree of freedom for designing a car body is ensured, and furthermore, at the time of parking, large physical force will not be required.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hydraulically driven stand raising device for a motorcycle.

, and (trying to do this) In a normal motorcycle, a main stand leg is attached to the lower part of the body frame between the front and rear wheels, and the main stand leg is attached to the body by the biasing force of a biasing spring. It swings between the storage position where it flips up towards the rear and the standing position where it stands up and supports the vehicle body.To raise the main stand legs and park the vehicle, the footrests must be operated. The driver steps on the main stand leg and uses his arms to lift the vehicle body and move it backwards.However, for large vehicles with large displacement, a large amount of force is required to raise the main stand leg. For example, Japanese Patent Application Laid-open No. 1846-1983 has addressed this problem.
A stand upright device Cffi was proposed in which a main stand leg is swung by the movement of a piston rod using a fluid pressure cylinder device as shown in Publication No. 7.

However, with such a stand raising device, the stroke of the piston rod is large and the fluid pressure cylinder device becomes large, which not only increases the weight of the vehicle, but also makes it difficult to avoid interference with other parts in the narrow space under the vehicle body. Disposing the fluid pressure cylinder device in a swingable manner has the disadvantage that the arrangement of components in the lower part of the vehicle body becomes complicated and the degree of freedom in design is reduced.

SUMMARY OF THE INVENTION An object of the present invention is to provide a hydraulically driven motorcycle stand erecting device that is compact and does not complicate the arrangement of components in the lower part of the vehicle body.

・ The purpose of this is to install a fixed shaft on the vehicle body side that is the center of swing of the main stand leg, a hydraulic cylinder mounted on the fixed shaft so that it can freely rotate in a reciprocating manner, and a hydraulic cylinder attached to the fixed shaft that is A bulkhead that contacts the inner wall of the hydraulic cylinder in an oil-tight manner, a wing wall attached to the inner wall of the hydraulic cylinder that extends in the axial direction, and slides in oil-tight contact with the outer peripheral surface of the fixed shaft, and a wing wall that is integrally connected to the hydraulic cylinder. Main stand legs that swing and rotate on a fixed axis,
Pressure oil from a hydraulic pressure source is introduced into a hydraulic chamber defined by a partition wall and a wing wall to rotate a hydraulic cylinder in the direction of raising the stand, and when the hydraulic cylinder returns and rotates, the pressure oil in the hydraulic chamber is transferred to an oil storage tank. This is achieved by providing a stand erecting device consisting of a valve body for returning the

Tip-Lid-1 Hereinafter, one embodiment of the present invention shown in FIGS. 1 to 11 will be described.

FIG. 1 shows an engine E mounted between the front and rear wheels FW and RW, and U-shaped main stand legs 5 attached to the left and right lower body frames 3 at a position near the front end of the engine E. A motorcycle 1 is shown. The main stand leg 5 is manually swung to the landing position via a cable 8 by moving a hand-operated lever 7 attached to the main vehicle body frame 2, and then moved to the upright position by hydraulic drive force through subsequent operation of the hand-operated lever 7. It is designed to be shaken up to.

The main stand leg 5 is biased by a stand leg biasing spring S, and swings between a storage position where it is flipped up in an attitude toward the rear of the vehicle body and an upright position where it stands up and supports the vehicle body.

2 and 3 show the detailed structure of the hydraulic stand erecting device for driving the main stand legs 5. FIG. The main stand legs 5 are swingably supported on a fixed shaft 11 by a pair of left and right stand boards 6 integrally attached to the leg bases. The fixed shaft 11 is a hollow body having two oil passages 12.14 that do not communicate with each other at its axial center, and a hollow body that passes through protrusions 4, 4 that are vertically installed on the left and right lower vehicle body frames 3.3. The fixed shaft 11 is supported by screwing the screws 9 and 10 into both ends of the fixed shaft 11. The hollow bolt 9 has a pipe joint 1 that guides pressure oil from a hydraulic pressure source to an oil passage 12.
6 is screwed into the hollow bolt 10, and a pipe joint 17 for guiding the pressure oil in the oil passage 14 to the oil storage tank is screwed into the hollow bolt 10.

Further, a hydraulic cylinder 18. The valve housing block 19 and the operating rotary plate 30 are fitted, the hydraulic cylinder 18 and the valve housing block 19 are fitted and integrated, and the power transmission bolt 34 screwed into the valve housing block 19 is fitted onto the operating rotary plate 30.
The power transmission bolt 35, which is screwed into the hydraulic cylinder 18, passes through the arcuate window 32 formed in the left stand board 6 and the arcuate window 68 formed in the left stand board 6. are doing. Incidentally, the relationship between the power transmission ports 1 to 34, 35 and the arcuate windows 32 and 6A will be explained later.

The valve storage block 19 has a pair of valve chambers 20 (only one of which is shown in FIG. 2) located symmetrically about its axis, and a spool valve 26 and a spool valve 26 therein. A compression coil spring 29 for urging is housed.

The valve chamber 20 is open on the side that contacts the operating rotary plate 30, and has a communication passage 23 that communicates with the boats 21.22 that communicate with the boats 13 and 15 of the oil passage 12.14, respectively, and the hydraulic chamber of the hydraulic cylinder 18. ing. In addition, since the valve storage block 19 rotates on the fixed shaft 11, the fixed shaft 1
The boats 13 and 15 of the valve storage block 19 have a part on the outer peripheral surface of the shaft formed in a circumferentially elongated groove shape.
．． 22 and boat 13.15 to ensure communication.

The spool valve 26 is spaced apart from the first valve body 27 . It has a second valve body 28, and the first valve body 27 is in the retreated position blocking the boat 21, and the first valve body enters the concave portion 31 of the operation rotary plate 30 due to the biasing force of the compression coil spring 29, and the second valve body The valve body 28 moves back and forth between the forward position and the forward position where the valve body 28 closes the boat 22. The operating position of the spool valve 2G is the valve storage block 19.
The spool valve 26 is retracted in the state shown in FIG. When rotated by an angle, the first valve body 21 biased by the compression coil spring 29 enters the concave portion 31 along the guiding slope formed on the operating rotary plate 30,
After this, when the operating rotary plate 30 rotates in the opposite direction relative to the valve storage block 19, the first valve body 27 is pushed back along the guiding slope.

The interior of the hydraulic cylinder 18 (cylinder chamber) includes a pair of partition walls 11a attached to the fixed shaft 11 and extending in the radial direction;
A pair of blade walls 18a attached to the inner wall of the hydraulic cylinder 18 and extending in the axial direction form a concave chamber, Δ.

It is divided into B and B. Chambers A and A are hydraulic chambers,
Each of them communicates with a pair of valve chambers 20 via a communication passage 23, and chambers B and B are air chambers that are open to the outside air.

In addition, valve storage block 19. A cable 8 for rotating the operation rotary plate 30 and the main stand leg 5 has one end connected to the manual operation lever 7, and the other end passing through the protrusion 25 along the circumferential groove 24 of the valve housing block 19. It is locked by a cable locking piece 33 screwed onto the outer periphery of the operating rotary plate 30. A cable spring 31 that fits over the cable 8 is interposed between the protrusion 25 and the cable locking piece 33, and the protrusion 25. The cable locking piece 33 is urged in the direction of separation. This biasing force is large enough to freely rotate the main stand leg 5 around the fixed @ 11, and when the manual lever 7 is swung and the cable 8 is pulled, the cable 8
The operating rotary plate 30 rotates due to the locking relationship between the cable locking piece 33 and the cable locking piece 33, and at the same time, the valve storage block 19 rotates due to the abutment relationship between the cable locking piece 33 and the cable spring 37, and the cable spring 37 and the protrusion 25. . The operating rotary plate 30 is operated by pulling the cable 8. Valve storage block 19
When the main stand leg 5 is rotated, the stand base plate 6 of the main stand leg 5 is swung due to the engagement with the power transmission bolts 34 and 35 screwed into the valve storage block 19. The engagement relationship is as shown in FIG. FIG. 6 shows a state in which the main stand leg 5 is in the retracted position where it is flipped up in an attitude toward the rear of the vehicle body, and the power transmission bolt 34 passes through the arc-shaped window 68 of the stand board 6, It is located at one end of 6. Further, in FIG. 6, the arcuate window 32 of the operating rotating plate 30 can be seen through the arcuate window 68, and the power transmission bolt 34 also passes through the arcuate window 32 and is located at one end of the arcuate window 32. Note that the engagement relationship between the power transmission bolt 35 and the right stand board 6 is the same as the engagement relationship between the power transmission bolt 34 and the left stand board 6, so a description thereof will be omitted.

The present embodiment is constructed as described above, and the movement of the main stand legs 5 will be explained next.

Figures 2, 3, and 5 show the parking state in which the main stand legs 5 are erected, corresponding to Figure 1, but the main stand legs 5 are flipped up with the main stand legs 5 facing toward the rear of the vehicle body. This state (FIGS. 4 and 6) is the initial state.

■First stage: When the manual lever 7 is swung, the cable 8 is pulled, and the cable 8. Cable lock 33
．． Cable spring 37. The operation rotary plate 30 is engaged with the protrusion 25 . The valve storage block 19 starts to rotate, and at the same time, the stand base plate 6. The main stand leg 5 starts swinging in the direction of arrow C. The movement during this time is performed only by human power against the spring force of the stand leg biasing spring S.
As shown in the figure, the tips of the main stand legs 5 land on the ground.

In addition, the volume of chamber A in the hydraulic cylinder 18 increases, and the pressure oil in the oil storage tank flows into chamber A through the path of oil passage 14 → boat 15 → boat 22 → valve chamber 20 -> communication passage 23 → chamber A. enter in.

Note that the inner wall of the valve chamber 20 has a boat 21, 22 and a communication passage 2.
A groove is formed to allow pressure oil to flow between the two.

■Third stage: In order for the main stand leg 5 to continue to swing even after the tip has landed, it must be done against the large body cart, so the hand-operated lever 7 must be swung.
! Even if this continues, the main stand leg 5 does not swing, and therefore the cable spring 37 pushed by the cable locking piece 33 is shortened based on the immovable projection 25. That is,
The operating rotary plate 30 rotates relative to the stationary valve storage block 19.

When the operating rotary plate 30 rotates through the angle (FIG. 8), the first valve body 21 of the spool valve 26 moves into the concave portion 3 of the operating rotary plate 30.
1, the boat 21 is opened, and the second valve body 28 closes the boat 22. As a result, the pressure oil discharged from the hydraulic pump (not shown) is introduced into the oil passage 12 through the pipe joint 16, and roughly from the boat 13 to the port 21.
→Valve chamber 20-) Communication passage 23→A chamber It enters both A chambers of the hydraulic cylinder 18. When the hydraulic pressure in the chamber rises, the R wall 18a is pushed and the hydraulic cylinder 18 begins to rotate, and the main stand leg 5 swings against the vehicle body load due to engagement with the power transmission bolts 34 and 35. The front wheel FW side is lifted. During this time, the manual operation lever 7 must continue to swing so that the cable locking piece 33 of the operation rotary plate 30 is not pushed back by the elastic restoring force of the cable spring 37. FIG. 9 shows the state immediately after the main stand leg 5 is completely erected.

■Third stage: When you release your hand from the hand/operating lever 7, the cable locking piece 33 is pushed back by the cable spring 37, and the operating rotary plate 30 is prevented from returning and rotating relative to the valve housing block 19. Fig. 10), spool valve 26
The boat 21 is closed and the boat 22 is opened. At the same time, the hydraulic cylinder 18 (valve housing block 19 and operating rotary plate 30) biased by the cylinder return spring 36 that engages with the power transmission bolt 35 is pulled back to the initial position (Fig. 11), and the volume is reduced. Pressure oil in the chamber goes through communication passage 23 → valve chamber 20 → boat 22 → boat 1
5→Return to the oil storage tank via the oil path 14. Return rotation of the hydraulic cylinder 18 is allowed by the power transmission bolt 34 , 35 being able to move along the arcuate window 6 A of the stand base plate 6 .

Note that the hydraulic cylinder 18. from the state shown in FIG. 11 to the state shown in FIG. Valve storage block 19. The fact that the operating rotary plate 30 can return and rotate freely means that the main stand leg 5 can be raised (see FIG. 11) from the state shown in FIG. It means that

■Fourth stage: When the vehicle body is pushed forward from the state shown in Fig. 11, the main stand leg 5 swings rearward and moves to the stowed position shown in Fig. 6 by the biasing force of the stand leg biasing spring S. Jumped up.

The features of this embodiment are as follows.

■The structure in which a hydraulic cylinder 18 is provided on the fixed shaft 11 and the main stand leg 5 is swung by the rotation of the hydraulic cylinder 18 is different in appearance even when compared with a normal main stand device that does not have a drive mechanism. 1, there is no interference with other parts and more freedom in car body design is ensured compared to the one using a long hydraulic cylinder device as shown in Special Publication No. 1F9 1986-18467. Moreover, it is sufficiently small and the increase in vehicle weight can be suppressed.

■When raising the main stand legs 5, it does not require much force until the main stand m5 lands, so the main stand legs 5 are swung by human power, and after landing, the main stand legs 5 are erected using hydraulic pressure. In a structure in which the leg 5 is moved once, the amount of oil discharged from the hydraulic pump can be reduced.

■After the main stand legs 5 are erected, the hydraulic cylinder 18. Valve storage block 19. Since the operating rotary plate 30 returns to the initial position and the main stand leg 5 that has been erected can be returned to the stowed position independently of the oil pressure am, the return spring force of the stand leg biasing spring S is not damaged by the flow of pressure oil. It won't happen.

- Since the main stand leg 5 can be swung independently of the hydraulic system, malfunctions in the hydraulic system can be dealt with.

As is clear from the above explanation, in the present invention, a hydraulic cylinder is fitted on a fixed shaft, and the main stand legs are swung up by the rotation of the hydraulic cylinder, so that when parking It does not require a large amount of physical strength, the device structure can be downsized, there is no interference with other parts compared to conventional hydraulic drive devices, and flexibility in vehicle body design is ensured.

[Brief explanation of the drawing]

FIG. 1 is a side view of a motorcycle equipped with a stand erecting device according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a main part of the stand erecting device seen from the rear side of the vehicle body (part of which is a developed view). ), Figure 3 shows the lll- in Figure 2.
1 [[A line sectional view, FIG. 4 is a view similar to FIG. 3 showing the main stand legs in the retracted position, FIG. 5 is a perspective view of the stand raising device, and FIGS. 6 to 11 are FIG. 6 is a schematic side view showing the operation mode of each of the main stand legs. 1... Motorcycle, 2... Main body frame, 3...
・Lower body frame, 4... Projection piece, 5... Main stand leg, 6... Stand board, 6^... Arc-shaped window,
7... Manual lever, 8... Cable, 9.10.
...Hollow bolt, 11...Fixed shaft, 12...Oil passage,
13... Boat, 14... Oil path, 15... Boat, 16.17... Pipe joint, 18... Hydraulic cylinder, 19... Valve storage block, 20... Valve chamber, 21.
22...Boat, 23...Communication path, 24...Peripheral groove, 25...Protrusion, 26...Spool valve, 27...
First valve body, 28... Second valve body, 29... Compression coil spring, 30... Operation rotary plate, 31... Concave portion, 32... Arc-shaped window, 33... Cable connection Stop piece, 34
．． 35...Power transmission bolt, 36...Cylinder return spring, 37...Cable spring, FW
...Front wheel, RW...Rear wheel, S...Stand leg biasing spring.

Claims (1)

[Scope of Claims] It is swingably attached to the lower part of the vehicle body, and is flipped up by the biasing force of a biasing spring in a position facing the rear of the vehicle body, and a standing position where it stands up and supports the vehicle body. In the upright device for the main stand legs that are moved, there is a fixed shaft on the vehicle body side that is the center of swing of the main stand legs,
a hydraulic cylinder fitted on the fixed shaft for reciprocating rotation; a partition attached to the fixed shaft extending in a radial direction and slidingly in oil-tight contact with an inner wall of the hydraulic cylinder; and a partition wall attached to the inner wall of the hydraulic cylinder. a wing wall that extends in the axial direction and slides in oil-tight contact with the outer peripheral surface of the fixed shaft; a main stand leg that swings and rotates on the fixed shaft integrally with the hydraulic cylinder; the partition wall and the wing wall; to rotate the hydraulic cylinder in the direction of standing up by guiding pressure oil from a hydraulic pressure generation source into a hydraulic chamber partitioned by and, and to return the pressure oil in the hydraulic chamber to the oil storage tank when the hydraulic cylinder returns and rotates. A motorcycle stand erecting device consisting of a valve body and a valve body.