JPH092363A - Parking brake device for scooter type vehicle - Google Patents

Abstract

(57) [Summary] [Purpose] The rotation of the rear wheels during parking is easily restricted to improve the anti-theft effect and stabilize the parking condition. Also, the number of component parts is reduced to improve productivity. A parking brake device (30) for a scooter type vehicle according to the present invention is rotatably supported by a drive shaft (23) for driving rear wheels, which is pivotally supported in a unit case (7) of a power unit. A rotation-side engagement portion 31 is provided on the portion, and the rotation-side engagement portion 31 is movable between the traveling position and the parking position in the unit case 7 by an operation from the outside. Drum member and drive shaft 23
The fixed side engaging portion 32 that prevents the rotation of the. As the drum member, a clutch housing 28 of a clutch device provided integrally with the drive shaft 23 for rotation is used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parking brake device for a scooter type vehicle which also serves as antitheft.

[0002]

2. Description of the Related Art Generally, an ignition key of a scooter type vehicle is provided in the vicinity of a shaft support portion of a handlebar, and a steering wheel lock device is provided alongside the ignition key. When the scooter type vehicle is parked, the handlebar lock device regulates the rotation of the handlebar to prevent theft.

[0003]

However, since the rear wheel can freely rotate only by using this handle lock device, the probability of being stolen is very high. Also, for example, when parking with a side stand on an inclined road surface, the rear wheels may rotate and the vehicle body may start to move naturally.
You can't park your car stably. In this case, if the rotation of the rear wheels is restricted by using a tool such as a chain lock, the anti-theft effect is increased and the parking condition is stable, but it is troublesome to attach and remove such a tool such as a chain lock. It is difficult to carry because there is a very limited space to store.

The present invention has been made in order to solve such a problem, and a scooter capable of easily controlling the rotation of the rear wheels during parking to improve the antitheft effect and stabilize the parking state. An object of the present invention is to provide a parking brake device for a type vehicle.

Another object of the present invention is to reduce the number of parts constituting the parking brake device and improve the productivity.

[0006]

In order to achieve the above object, a parking brake device for a scooter type vehicle according to the present invention is axially supported in a unit case of a power unit and has rear wheels as described in claim 1. A drum member is rotatably provided integrally with a drive shaft that drives the rotary shaft, and a rotation-side engaging portion is projectingly provided on a peripheral portion of the drum member. A fixed side engagement portion that is movable and that engages with the rotation side engagement portion of the drum member at the parking position to prevent rotation of the drum member and the drive shaft is provided.

Further, in the parking brake device for a scooter type vehicle according to the present invention, as described in claim 2, the driven side member of the clutch device provided integrally with the drive shaft for rotation is a drum member, and the periphery thereof. A rotation side engaging portion is provided on the portion.

[0008]

A parking brake device for a scooter type vehicle is provided.
When the fixed side engaging portion is operated from the outside to move it from the traveling position to the parking position in the unit case, the fixed side engaging portion is projected on the peripheral portion of the drum member. The rotation of the drum member and the drive shaft is prevented by coming into contact with the rotation side engaging portion, and the rotation of the rear wheel is restricted. Therefore, the anti-theft effect of the scooter type vehicle is improved and the parking state is stabilized.

Further, if the driven side member of the clutch device is used as a drum member and the rotation side engaging portion is provided in a projecting manner on the peripheral portion as described in claim 2, a dedicated drum for providing the rotation side engaging portion is provided. It is not necessary to provide a member on the drive shaft, the number of parts constituting the parking brake device is reduced, and the productivity is improved.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a left side view of a scooter type vehicle to which a parking brake device according to the present invention is applied. In this scooter type vehicle 1, front wheels 2 and a handlebar 3 for steering the front wheels 2 are provided on a front head portion of a vehicle body, and a power unit 5 is connected to a rear portion of the vehicle body via a link 4. In this power unit 5, an engine 6 and a unit case 7 are integrated into a unit, and a rear wheel 8 is directly supported by a rear portion of the unit case 7. The rear portion of the power unit 5 is suspended by a rear cushion unit 9 on the vehicle body side.

A seat 11 is provided above the power unit 5.
A floor board 12 is provided between the seat 11 and the handlebar 3 so that the floor of the passenger can rest on the lower part of the bay.

FIG. 2 is a cross-sectional view of the power unit 5 taken along the line II-II of FIG. The engine 6 of the power unit 5 is a single cylinder engine, and a cylinder assembly 14 projects forward from a crankcase 13 of the engine. The unit case 7 is composed of a case main body 15 that is integrally connected to the left side of the crank case 13 and extends rearward, and a case cover 16 that is detachably attached to the left side opening of the case main body 15. Inside the unit case 7, a V-belt automatic transmission device for transmitting the power of the engine 6 to the rear wheels 8
17 and a speed reducer 18 including a gear train. The rear wheel 8 is supported by an axle shaft 19 pivotally supported on the rearmost portion of the unit case 7.

The crankshaft 21 of the engine 7 is axially supported in the crankcase 13 in the vehicle width direction, and the left end of the crankshaft 21 projects forward in the unit case 7 to drive the V-belt automatic transmission 17. The pulley 22 is fixed integrally with the rotation. Further, a driven pulley 24 of a V-belt automatic transmission device 17 and a centrifugal clutch device 25 are rotatably supported on a drive shaft 23 that is rotatably supported at the rear portion of the unit case 7, and a drive pulley 22 and a driven pulley 24 are provided. A V-belt 26 is wound between.

The clutch device 25 comprises a clutch shoe assembly 27 as a driving side member and a clutch housing 28 as a driven side member that covers the periphery of the clutch shoe assembly 27. The clutch shoe assembly 27 is a driven pulley 24. The drive shaft 23 is integrally rotatable around the drive shaft 23, and the clutch housing 28 is provided on the drive shaft 23 so as to rotate integrally therewith.

The output of the engine 6, that is, the rotation of the crankshaft 21 is transmitted from the drive pulley 22 through the V belt 26 to the driven pulley 24, and the rotation of the driven pulley 24 is transmitted to the clutch shoe assembly 27 of the clutch device 25.
When the rotation speed of the clutch shoe assembly 27 increases,
The centrifugal force causes the plurality of clutch shoes to expand in the centrifugal direction, and frictionally engages with the inside of the clutch housing 28. Therefore, the clutch housing 28 starts to rotate, and the rotation is transmitted to the drive shaft 23. Then, the drive shaft 23 drives the rear wheel 8 via the reduction gear device 18.

3 (A) and 3 (B) are vertical sectional views taken along line III-III in FIG. 2, showing a first embodiment of the parking brake device 30 according to the present invention. This parking brake device 30 is configured as follows.

First, the clutch housing 28, which is rotatably integrated with the drive shaft 23, is also used as a drum member which constitutes the parking brake device 30, and has two rotating side engagements on its peripheral portion, that is, the outer peripheral surface. Joints 31 are projected at 180 ° intervals. Three or more rotation side engaging portions 31 may be provided, but it is necessary to arrange them at equal intervals on the circumference of the clutch housing 28 as much as possible.

On the other hand, a fixed side engaging portion 32 is provided in the unit case 7. The fixed-side engaging portion 32 is fixed to the upper surface of the clutch housing 28 at a substantially central portion of the lower surface of a leaf spring 33 fixed to the ceiling portion of the case cover 16. Both ends of the leaf spring 33 are fixed to the case cover 16 with screws 34, and a central portion thereof, that is, a portion to which the fixed side engaging portion 32 is fixed can be vertically arranged.

Normally, the leaf spring 33 is in close contact with the ceiling portion of the case cover 16 as shown in FIG. 3A, and the position of the fixed side engaging portion 32 at this time is the running position. Also, FIG. 3 (B)
When the leaf spring 33 is downward as described above, the position of the fixed side engaging portion 32 is lowered, and the position at that time is the parking position.

An operation lever 35 is provided on the upper part of the unit case 7. The operation lever 35 extends forward from, for example, a portion of a bolt 36 that fastens the lower portion of the rear cushion unit 9 to the unit case 7, and can rotate up and down with the bolt 36 as an axis. Operating lever 35
A grip portion 37 for gripping by hand is attached to a tip end of the operation lever 35, a push rod 38 extending downward and inserted into the unit case 7 at an intermediate portion of the operation lever 35, and a lock plate standing upward. 39 and 39 are provided integrally.
A waterproof and dustproof seal member 41 is fitted in the portion where the push rod 38 is inserted into the unit case 7, and a hole 42 is formed in the center of the lock plate 39.

Further, a lock mechanism 43 is provided adjacent to the right side of the operating lever 35. The lock mechanism 43 is a lock body 44 fixed to the case body 15 and a key cylinder.
45 and the lock pin 46 are provided. By inserting the ignition key or the like of the scooter type vehicle 1 into the key cylinder 45 and twisting the lock cylinder 46, the lock pin 46 is provided in the lock body 44 in a direction perpendicular to the longitudinal direction of the operation lever 35. It is configured to appear in and out of. From this lock pin 46 to the operating lever 35
The linear distance to the bolt 36 that is the fulcrum of the
The straight line distance to 36 is set the same.

A parking brake device constructed as described above
When the scooter type vehicle 1 is parked using 30, the operation lever 35 is pushed down and then the key cylinder 45 is operated by the key to lock the operation lever 35.

When the operation lever 35 is pushed down,
As shown in Fig. 3 (B), the tip of the push rod 38 is a leaf spring 33.
In order to press the central part of the so as to bend the leaf spring 33 downward,
The fixed side engaging portion 32 is placed at the parking position. Further, the lock pin 46 is projected from the lock body 44 by operating the key cylinder 45, and the protruding lock pin 46 is inserted from the right side into the hole 42 formed in the lock plate 39 of the operation lever 35 to rotate the operation lever 35. Is locked, the fixed side engaging portion 32
Are held in the parking position.

Even if the clutch housing 28 tries to rotate in this state, the rotating side engaging portion 31 provided on the peripheral portion of the clutch housing 28 contacts the fixed side engaging portion 32, so that the clutch housing 28 and the drive shaft 23 Is prevented, and the rotation of the rear wheel 8 is restricted.

When the lock mechanism 43 is unlocked by the key, the fixed side engaging portion 32 is returned to the traveling position by the repulsive force of the leaf spring 33 as shown in FIG. 3 (A), and the clutch housing 28 and the drive shaft are driven. The rear wheel 8 becomes rotatable because the hindrance of rotation of 23 is eliminated.

As described above, since the rotation of the rear wheel 8 can be easily regulated by using the parking brake device 30 according to the present invention, the antitheft effect of the scooter type vehicle 1 can be obtained by using the parking brake device 30 together with the steering wheel lock device. Can be significantly improved. Further, for example, when the scooter type vehicle 1 is parked on a sloped road surface using the side stand, it is possible to prevent a situation in which the rear wheels 8 rotate and the vehicle body starts to move naturally, and the parking state can be stabilized.

Since the parking brake device 30 also uses the clutch housing 28 of the clutch device 25 as a drum member, it is not necessary to provide a dedicated drum member on the drive shaft 23. Therefore, the number of parts constituting the parking brake device 30 can be reduced and the productivity can be improved.

In this embodiment, the clutch housing 28 can be rotated by nearly 180 ° even when the fixed side engaging portion 32 is placed at the parking position. However, the rotation of the clutch housing 28 is controlled by the speed reducer 18. Since the speed is reduced to about 1/13 and transmitted to the rear wheel 8, the turning angle of the rear wheel 8 becomes small.

By the way, FIGS. 4A and 4B show a second embodiment of the parking brake device according to the present invention. The parking brake device 50 includes an operating lever 51 and a lock mechanism.
Since members other than 52 have the same structure and operation as those of the parking brake device 30 of the first embodiment shown in FIG. 3, the same reference numerals are given and the description thereof is omitted.

The total length of the operating lever 51 is about half that of the operating lever 35 shown in the first embodiment, and the grip portion is not provided, and the tip portion thereof extends downward and is inserted into the unit case 7. The push rod 53 and the lock plate 54 standing upward are integrally provided. The lock plate 54 has an elliptical hole 55 along the longitudinal direction of the operating lever 35.
Are drilled.

On the other hand, the lock mechanism 52 includes a lock body 56 fixed to the case body 15 and a key cylinder 57 and a lock pin.
58 is the same as the lock mechanism 43 shown in the first embodiment, but when the key is inserted into the key cylinder 57 and twisted, the lock pin 58 moves up and down while protruding from the lock body 56. To do. And this lock pin 58
Is fitted into the elliptical hole 55 of the operating lever 51.

The lock pin 58 is operated by operating the key cylinder 57.
When is moved up and down, the operation lever 51 is rotated up and down in conjunction with this. At that time, the lock pin 58 is the lock plate.
It moves in the longitudinal direction within the oval hole 55 of 54.

In the state of FIG. 4 (A), the lock pin 58 is located on the upper side and the operating lever 51 is also rotated upward, so the push rod 53 does not press the leaf spring 33 downward, The fixed side engaging portion 32 is placed at the traveling position and does not hinder the rotation of the rear wheel 8.

When the key cylinder 57 is operated with the keys in this state, the lock pin 58 moves downward as shown in FIG.
Along with this, the operation lever 51 rotates downward. Therefore, the tip end portion of the push rod 53 presses the central portion of the leaf spring 33 to place the fixed side engagement portion 32 in the parking position, which prevents the clutch housing 28 and the drive shaft 23 from rotating and the rear wheel 8 Rotation is restricted.

The parking brake device 50 configured as described above
In this case, since the rotation of the rear wheel 8 can be restricted or released only by operating the key cylinder 57 without operating the operation lever 51 by hand, the operation can be easily performed with one hand and the operability is good.

[0036]

As described above, the parking brake device for a scooter type vehicle according to the present invention is rotatably integrally provided with the drum member on the drive shaft for driving the rear wheels, which is rotatably supported in the unit case of the power unit. A rotation-side engagement portion is provided so as to project from the peripheral portion of the drum member, and the rotation-side engagement portion of the drum member is movable between the traveling position and the parking position in the unit case by an operation from the outside. It is characterized in that a fixed side engaging portion which engages with the portion and prevents rotation of the drum member and the drive shaft is provided.

With this structure, the rotation of the rear wheels can be easily regulated, so that the antitheft effect of the scooter type vehicle can be greatly improved and the parking condition on the sloped road surface can be stabilized. .

Further, in the parking brake device for a scooter type vehicle according to the present invention, the driven side member of the clutch device rotatably integrated with the drive shaft is a drum member, and the rotation side engaging portion is projected on the peripheral portion thereof. Since it is provided, it is not necessary to provide a dedicated drum member for providing the rotation side engaging portion on the drive shaft, so that the number of parts constituting the parking brake device can be reduced and the productivity can be improved.

[Brief description of drawings]

FIG. 1 is a left side view of a scooter type vehicle to which a parking brake device according to the present invention is applied.

FIG. 2 is a cross-sectional view of the power unit taken along the line II-II in FIG.

3 shows a first embodiment of the present invention by a vertical section taken along line III-III of FIG. 2, and (A) is a view showing a state in which a fixed side engaging portion is placed at a traveling position. , (B) are diagrams showing a state in which the fixed side engaging portion is placed at the parking position.

FIG. 4 shows a second embodiment of the present invention, (A) is a view showing a state in which the fixed side engaging portion is placed at the traveling position,
(B) is a diagram showing a state in which the fixed side engaging portion is placed at a parking position.

[Explanation of symbols]

1 Scooter type vehicle 5 Power unit 7 Unit case 8 Rear wheel 17 V-belt automatic transmission 18 Reduction gear 23 Drive shaft 25 Clutch device 28 Clutch housing which is a driven side member of the clutch device and a drum member of the parking brake device 30 Parking brake Device 31 Rotating side engaging part 32 Fixed side engaging part 33 Leaf spring 35 Operation lever

Claims (2)

[Claims] 1. A drum member is rotatably integrated with a drive shaft 23 that is supported in a unit case 7 of a power unit 5 and drives a rear wheel 8. A rotary side engaging portion is provided around a peripheral portion of the drum member.
While projecting 31, the external unit is operable to move between the traveling position and the parking position in the unit case 7, and engages with the rotation side engaging portion 31 of the drum member to drive the drum member at the parking position. A parking brake device for a scooter type vehicle, characterized in that a fixed side engaging portion (32) for preventing rotation of the shaft (23) is provided. 2. The driven side member (clutch housing 25) of the clutch device 25 provided integrally with the drive shaft 23 so as to rotate together is a drum member, and the rotation side engaging portion 32 is provided on the peripheral portion of the drum member in a protruding manner. Parking brake device for the scooter type vehicle described.