JP2014198549A - Motor cycle travel device for off road such as on-snow - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a travel device capable of being attached to a motor cycle for traveling on an off road such as on-snow, sand, a mud place, marsh, a rocky place, or on rubbish.SOLUTION: The motor cycle comprises a drive device 51 having a crawler instead of a rear wheel and an auxiliary drive device 52. Because a ground area of the drive part is increased, the motor cycle is not buried easily in snow, sand, mud, marsh or the like. At the same time, frictional force with a road surface is increased so that the rear wheel is not fallen to a depression on a road where there is large irregularities such as rubbish. As a result, propulsion power and brake force are increased and traveling on an off road becomes possible. If a travel condition is limited to on snow, a ski 15 is attached instead of a front wheel for improving travel stability.

Description

The present invention relates to a traveling device that can be attached to a motorcycle so that the motorcycle travels on rough terrain such as snowy, sandy, muddy ground, wetland, rocky place, and rubble.

Motorcycles are indispensable for people's lives as an easy means of transportation.
In snowy areas, motorcycles deliver mail and newspapers even when there is snow. In addition, due to its good mobility, it can be expected to play an important role in transporting goods and saving lives in the event of a disaster.

The characteristics of the two-wheeled vehicle include that it is a two-wheeled vehicle, that the ground contact surface of the tire is curved and that the ground contact area is small, and that the drive wheel is only the rear wheel.
Due to this feature, the vehicle body is buried on a soft road surface such as on snow, and the lower part of the vehicle body is brought into contact with the road so that the running resistance increases and the propulsive force that the motorcycle tries to move forward is lost. In addition, on the road surface with large irregularities such as rubble of the collapsed building, there was a problem that the rear wheel fell into the depression and it was difficult to run.

In order to solve the problems of the motorcycle as described above, there have been the following techniques.
In the invention disclosed in Japanese Patent Application Laid-Open No. H09-226671, the crawler is disposed inside the rear arm of the rear arm whose rear end is bifurcated into the left and right in the driving unit at the rear of the motorcycle.
As a means of avoiding burial, it is characterized in that a crawler having a larger ground contact area than the rear tire is adopted for the drive unit instead of the rear wheel. In addition, a feature is that a ski having a larger ground contact area than the front tire is attached in the vicinity of the front wheel.

JP H09-226671

None.

However, the traveling device described above has the following problems.

When running on a soft road surface such as snow, a crawler with a large ground contact area is used as the drive unit as a means of avoiding burial, but the crawler is placed in a bifurcated rear arm whose rear end is divided into left and right. Since it is limited to the inside, the width of the crawler cannot be increased, and the ground contact area is limited. Therefore, when the soft part of the road surface is deep, such as deep snow, the driving unit digs the road surface and the vehicle body is buried, so there is a limit on the traveling conditions.

Since it was assumed that skis were installed near the front wheels, the emphasis was on running stability on snow. The lower part of the front wheel is exposed by lifting the ski to support running on hard roads. However, on roads with large irregularities such as rubble, there is a risk that the skis may come into contact with the skis, and there are limits to the driving conditions. .

The present invention solves the above-described problems and provides a traveling device for a motorcycle that does not limit the traveling conditions by providing a portion that can be attached and detached according to the traveling conditions.

In a motorcycle, in place of the rear wheel, the driving wheel that transmits the driving force to the crawler, the crawler that contacts the inner surface of the outer periphery of the driving wheel so as to be wound, and the driving wheel away from the driving wheel so as to apply tension to the crawler from the inside of the crawler A drive device having a pulley and a member on which the pulley is rotatably mounted in order to maintain the distance between the pulley and the rear end of the drive device. In addition, the ground contact area of the crawler can be expanded depending on traveling conditions by connecting an auxiliary drive device having an auxiliary crawler similar to the drive device to both sides of the drive device.

If the front wheels of a motorcycle are in the standard state, they have excellent running stability on rough terrain such as sand, muddy ground, wetlands, rocky lands and rubbles. Excellent stability.
The rudder method at the front of the vehicle body can be selected according to the running conditions.

The present invention can solve the problem of motorcycles with limited travel conditions, and has the following effects.

If the motorcycle is changed to the rear wheel instead of the rear wheel, the drive unit is only placed inside the rear arm that splits into the left and right sides, if it is on snow with little or no snow, sand, muddy ground, It is possible to travel on rough terrain such as wetlands, rocky lands and rubble. Due to the large contact area of the drive unit, it is possible to avoid burying the car body on soft road surfaces such as snow, and on the road surface with large irregularities such as rubble of a collapsed building, it is possible to avoid the rear wheels falling into the depression. Improved running performance on leveling.

In addition to the above, the changed part of the motorcycle can travel on soft road surfaces such as snow, sand, muddy ground, and wetland when an auxiliary drive is connected. The auxiliary drive device, which is an extended portion, increases the contact area of the drive unit, avoids the vehicle body being buried, and improves running performance on soft road surfaces.

In addition to the above, the changed part of the motorcycle can run on any snow when a ski is arranged instead of the front wheel. Due to the large contact area, the vehicle body can be prevented from being buried and the running stability is improved. If there is little snow and there is no risk of burial, the auxiliary drive unit may be removed.

In the drive unit of the traveling device of the present invention, the rear arm remains in the standard state of the motorcycle, and only the wheel and the wheel mounting peripheral part are replaced. Since the number of replacement parts is minimized, the installation time of the traveling device can be shortened.
The force that advances the motorcycle is propulsion, whereas the reverse force is called braking force and stops the motorcycle from moving forward. Both of the drive units of the traveling device of the present invention can transmit.

Example 1 will be described. It shows that the ski is replaced with the front wheel, and the driving device and the auxiliary driving device are mounted instead of the rear wheel. Example 1 will be described. In order to show the arrangement of each device, the exterior parts are not shown. Example 1 will be described. FIG. 2 is a view of a cross section taken along a cross sectional line A in FIG. 1 as viewed from the back of the motorcycle. Example 2 will be described. It shows that the drive unit was installed instead of the rear wheel. Example 2 will be described. FIG. 5 is a view of the motorcycle of FIG. 4 as viewed from the back. Example 3 will be described. It shows that a driving device and an auxiliary driving device are attached in place of the rear wheel. When Example 3 is carried out, the rear view shows the posture of the motorcycle when turning. Example 4 will be described. It shows that the drive unit was installed instead of the rear wheel. In addition to the implementation of the fourth embodiment, the rear view shows the attitude of the motorcycle when turning when the auxiliary drive device is attached. Example 5 will be described. A structural difference from the driving apparatus shown in the second embodiment will be described. Example 6 will be described. The mechanism for transmitting the driving force is shown by making the section where the protrusion of the driving wheel and the protrusion of the crawler mesh with each other.

The motorcycle traveling device provided by the present invention is characterized in that it has expandability by providing a portion that can be attached and detached according to traveling conditions.

1, 2 and 3 show Example 1. FIG. In this embodiment, the ski 15 is attached instead of the front wheel of the motorcycle, and the drive device 51 is arranged on the inner side of the rear arm 6 instead of the rear wheel. The auxiliary driving device 52 is connected.
FIG. 1 shows a side view of a motorcycle. FIG. 2 shows a plan view of the motorcycle, but the exterior parts are not shown in order to show the arrangement of each device. FIG. 3 is a view of the cross section taken along the cross sectional line A of FIG. 1 as viewed from the rear of the motorcycle.

The arrangement of each device will be described with reference to FIG.
Instead of the rear wheel of the motorcycle, the driving device 51 is arranged on the inner side of the rear arm 6. An auxiliary driving device 52 similar to the driving device 51 is disposed on both sides of the driving device 51. A ski 15 can be installed in place of the front wheel of the motorcycle.
The motorcycle traveling device of the present invention is composed of a driving device 51, an auxiliary driving device 52, and a ski 15 as shown in the figure.

A structure in which the driving force of the driving device 51 is distributed to the auxiliary driving device 52 will be described with reference to FIG.
The transmission shaft 10 is fixed concentrically with the pulley 2 so as to penetrate the center of the pulley 2.
The auxiliary shaft 22 is fixed concentrically with the auxiliary driving wheel 16 so as to penetrate the center of the auxiliary driving wheel 16.
The two left and right auxiliary shafts 22 are arranged in series at both ends of the transmission shaft 10 and are concentrically connected by the coupling 21. Therefore, when the pulley 2 rotates, the auxiliary driving wheel 16 also rotates, and the driving force is transmitted from the driving device 51 to the auxiliary driving device 52.

The structure of the auxiliary drive device 52 will be described with reference to FIG.
The auxiliary driving wheel 16 and the driven wheel 17 and the auxiliary frame 18 and the driven wheel bracket 19 that work to keep the two distances away from each other apply tension to the auxiliary crawler 20 from the inside of the auxiliary crawler 20, and the auxiliary crawler 20 is infinite. A track is formed, and the auxiliary drive device 52 is configured as a whole.

The auxiliary drive wheel 16 is concentrically fixed to the auxiliary shaft 22 and is pivotally attached to the auxiliary frame 18. A plurality of protrusions for transmitting driving force to the auxiliary crawler 20 are arranged on the auxiliary driving wheel 16 in a direction perpendicular to the circumferential driving direction.
The auxiliary crawler 20 can be bent, and is an endless track band that contacts the inner surface with the outer periphery of the auxiliary driving wheel 16 so as to be wound, and a plurality of protrusions meshed with the protrusions of the auxiliary driving wheel to transmit driving force Provided. The auxiliary crawler 20 transmits the driving force of the auxiliary driving wheel to the ground and converts it into the propulsive force and braking force of the motorcycle.
The driven wheel 17 is rotatably mounted on the driven wheel bracket 19 and is disposed at a position away from the auxiliary driving wheel 16 on the inner surface of the auxiliary crawler 20 in order to apply tension to the auxiliary crawler 20.
Most parts of the auxiliary drive device 52 are attached to the auxiliary frame 18 and fixed to the A frame 4 of the drive device 51.
The driven wheel bracket 17 is fixed to the auxiliary frame 18 by the auxiliary portion fastening bolts 23, and functions to keep the positional relationship between the auxiliary driving wheel 16 and the driven wheel 17 together with the auxiliary frame 18 at a predetermined interval.

When the extension or length difference of the auxiliary crawler 20 occurs, it is necessary to change the interval between the auxiliary driving wheel 16 and the driven wheel 17. In that case, the position of the driven wheel 17 can be changed by loosening the auxiliary portion fastening bolt 23 and moving the driven wheel bracket 19 back and forth by the auxiliary portion tension adjusting tool 24, and tension can be applied to the auxiliary crawler 20.

4 and 5 show Example 2. FIG. In this embodiment, instead of the rear wheel of the motorcycle, the driving device 51 is arranged on the inner side of the rear arm 6. Although only the driving device 51 which is a part of the traveling device shown in the first embodiment is attached, traveling is possible even in this state. FIG. 4 is a side view of the motorcycle, and FIG. 5 is a rear view.

The structure of the drive device 51 will be described with reference to FIG. The driving wheel 1 and the pulley 2 and the swing member 3 and the A frame 4 that work to keep the distance between the two are applying tension to the crawler 5 from the inside of the crawler 5, and the crawler 5 forms an endless track, The drive device 51 is configured as a whole. The drive device 51 is held by the rear arm 6 to support the weight of the rear part of the motorcycle.

The rear arm 6 is a rear wheel support portion that is standardly equipped on the motorcycle, and the front end is pivotally mounted on the vehicle body, and the rear end swing is regulated by a rear suspension 42 that is standard on the motorcycle. The rear end of the rear arm 6 has a bifurcated shape that is divided into left and right. The rotational power of the drive sprocket 7 driven by the drive source 41 operates the drive chain 8 and transmits the driving force to the rear sprocket 9.
The drive wheel 1 is rotatably mounted on the inner side of the rear end of the rear arm 6 in a rotatable manner. A rotating portion of the rear brake and a rear sprocket 9 are concentrically fixed to the driving wheel 1, and a plurality of protrusions 1a for transmitting driving force to the crawler 5 are arranged in a direction perpendicular to the circumferential driving direction. The projection 1a meshes with the crawler projection 5a to transmit the driving force, but it is not necessary to provide a projection that meshes with all the crawler projection 5a. 1a may be 2 to 10.
The crawler 5 can be bent and is an endless track band that contacts the inner surface with the outer periphery of the drive wheel 1 so as to be wound, and a plurality of protrusions 5a meshed with the protrusion 1a of the drive wheel to transmit driving force are formed on the inner surface Provided. The crawler 5 transmits the driving force of the driving wheel 1 to the ground and converts the driving force to the pulley 2 in addition to the propulsion force and braking force of the motorcycle.
The pulley 2 is concentrically fixed to the transmission shaft 10, is rotatably mounted on the A frame 4, and is disposed at a position away from the inner surface of the crawler 5 and the drive wheel 1 in order to apply tension to the crawler 1. In order to transmit driving force to the pulley 2, a plurality of protrusions 2a meshed with the protrusions 5a on the inner surface of the crawler are provided on the outer periphery.
The intermediate wheel 11 is rotatably mounted on the A frame 4 like the pulley 2. In addition to pressing the crawler 5 against the road surface, the intermediate wheel 11 also guides the side surface of the crawler protrusion 5a to prevent the crawler 5 from derailing from the circumferential operation direction.
The swing member 3 is pivotally mounted near the rotation center of the drive wheel 1 so that the swing is restricted by the torque rod 12.
The torque rod 12 is pivotally mounted at its rear end so as to be freely swingable to the swing member and at its front end so as to be swingable to the vehicle body, and is arranged substantially parallel to the rear arm 6. Even if the external force received by the crawler 5 is transmitted to the drive wheels 1 and the rear arm 6 swings when the vehicle body passes through the uneven portion of the road surface, the torque rod 12 controls the attitude of the drive device 51 and contacts the crawler 5. It acts as a link that makes the ground parallel to the ground.
The A frame 4 is fixed to the swing member 3 by fastening bolts 13 and works together with the swing member 3 to maintain the positional relationship between the drive wheel 1 and the pulley 2 at a predetermined interval.

When the crawler 5 is extended or different in length, it is necessary to change the distance between the drive wheel 1 and the pulley 2. In that case, the position of the pulley 2 can be changed by loosening the fastening bolt 13 and moving the A frame 4 back and forth by the tension adjuster 14, and tension can be applied to the crawler 5.

If the hard road surface is not exposed due to snow accumulation, the ski 15 may be attached instead of the front wheels as in the first embodiment.

6 and 7 show Example 3. FIG. This embodiment is a supplementary explanation for the auxiliary drive device 52 shown in the first embodiment.
FIG. 6 shows a side view of the drive unit. FIG. 7 is a rear view showing the posture of the motorcycle when turning.

A supplementary description of the structure of the auxiliary drive device 52 will be given with reference to FIG.
If the auxiliary drive wheel 16 is set smaller than the pulley 2, the contact surface of the auxiliary crawler 20 can be kept away from the road surface. By doing so, the operation of tilting the vehicle body that appears when the motorcycle turns as shown in FIG. 7 is not hindered.

The driven wheel 17 can be set smaller than the auxiliary driving wheel 16, and can be disposed above. By doing so, the angle toward the ground contact surface of the auxiliary crawler 20 can be set, and the running performance on a soft road surface is improved.
A rolling wheel 25 can be provided between the auxiliary driving wheel 16 and the driven wheel 17 to prevent a load or sagging on the auxiliary crawler 20. The wheels also serve to guide the side surfaces of the protrusions of the auxiliary crawler 20 and to prevent the auxiliary crawler 20 from derailing from the circumferential operation direction.

8 and 9 show Example 4. FIG. This embodiment is a supplementary explanation for the driving device 51 shown in the second embodiment.
FIG. 8 shows a side view of the drive unit. FIG. 9 is a rear view showing the posture of the motorcycle when turning when the auxiliary drive device 52 is attached to the drive device 51 shown in FIG.

FIG. 8 supplementarily explains the structure of the driving device.
As shown in the figure, the lowermost surface of the pulley 2 may be set higher than the lowermost surface of the intermediate wheel 11. By doing so, the contact area on the hard road surface can be reduced without reducing the contact area on the soft road surface, and an excessive frictional resistance on a paved road can be avoided. The optimum value for dimension C is 0 to 40 mm, but larger dimensions may be used if running performance on soft roads is not important.

By implementing the fourth embodiment, the attachment position of the auxiliary drive device 52 can be arranged upward as shown in FIG. 9, and the ground contact surface of the auxiliary crawler 20 can be kept away from the road surface. By doing so, it does not hinder the operation of tilting the vehicle body that appears when the motorcycle turns.

FIG. 10 shows Example 5. In this embodiment, instead of the rear wheel of the motorcycle, a driving device 51 is arranged on the inner side of the rear arm 6 whose rear end is divided into left and right parts.
This embodiment is another plan of the driving device 51 shown in the second embodiment, and the major difference is that the posture of the driving device 51 is controlled by the swing buffer 26 instead of the torque rod 12. As the members, the torque rod 12 replaces the swing buffer 26, the swing member 3 replaces the extension member 27, and the A frame 4 replaces the B frame 28.
FIG. 10 shows a side view of the drive unit.

The difference in structure from the driving device 51 shown in Embodiment 2 in FIG. 10 and the function of the rocking buffer will be described.
The extension member 27 is fixed to the rear end of the rear arm 6.
The outer shell of the rocking buffer 26 is fixed to the extension member 27 as a fixed side. A B frame 28 is fixed to the central core of the rocking portion of the rocking buffer 26.
In the B frame 28, the pulley 2 and the intermediate wheel 11 are rotatably mounted, and together with the extension member 27, the B frame 28 functions to maintain the positional relationship between the driving wheel 1 and the pulley 2 at a predetermined interval.
The swing buffer 26 has a buffer function in addition to the bearing function. Even if the central core oscillates due to external force, it tries to return to its original angle because of its restoring force.
When the motorcycle passes through the uneven portion of the road surface, even if the external force received by the crawler 5 is transmitted to the pulley 2 or the intermediate wheel 11 and the B frame 28 swings upward, the restoring force of the swinging buffer 26 drives the driving device 51. The posture of the crawler 5 is controlled and works so as to press the contact surface of the crawler 5 against the ground.
Example 2 is the same as Example 2 except for the contents described in Example 5.

FIG. 11 shows a sixth embodiment.
This figure is a section taken along section line B in FIG. 4 and shows a state in which the protrusion 1a of the driving wheel 1 and the protrusion 5a of the crawler 5 are engaged with each other, and shows a mechanism for transmitting the driving force.
The drive wheel 1 also has a protrusion 1b in the circumferential operation direction, and guides the side surface of the crawler protrusion 5a to prevent the crawler 5 from derailing from the circumferential operation direction.
The outer periphery 1c of the drive wheel has a structure similar to that of a rubber or pneumatic tire, and can be attached to a rim 29 provided as a standard in a motorcycle.

When the traveling device of the present invention is attached to a motorcycle, it can be used for the following applications.
Means of transportation during snowfall. Patrol at the ski resort. Transportation of goods and lifesaving at the time of disaster. Means of transportation in the forest. Leisure sports.

1 Drive wheel
2 pulley
3 Swing member
4 A frame
5 Crawler
6 Rear arm
7 Drive sprocket
8 Drive chain
9 Rear sprocket
10 Transmission shaft
11 Intermediate wheel
12 Torque rod
13 Fastening bolt
14 Tension adjuster
15 Skiing
16 Auxiliary drive wheels
17 Follower wheel
18 Auxiliary frame
19 Driven wheel bracket
20 Auxiliary crawler
21 coupling
22 Auxiliary shaft
23 Auxiliary fastening bolt
24 Auxiliary tension adjuster
25 wheels
26 Swing buffer
27 Extension member
28 B frame
29 rims
41 Drive source
42 Rear suspension
51 Drive unit
52 Auxiliary drive

Claims (4)

The driving force of the two-wheeled vehicle is the driving force of the two-wheeled vehicle that is transmitted by contacting the inner surface so as to be wound around at least a part of the outer periphery of the driving wheel. A crawler capable of acting on the ground surface to convert to a pulley, a pulley spaced from the drive wheel to apply tension to the crawler from the inside of the crawler, and the distance to maintain the spaced distance A first holding member rotatably mounted on a pulley, and the driving device in a two-wheeled vehicle in which a rear end of the rear arm is divided into left and right bifurcated rear arms. The driving force of the auxiliary driving wheel transmitted by contacting the inner surface so as to be wound around at least a part of the outer periphery of the auxiliary driving wheel and the auxiliary driving wheel drivable due to the rotational power of the source An auxiliary crawler capable of acting on the ground contact surface to be converted into a driving force of a car, a driven wheel that is moved away from the auxiliary drive wheel so as to apply tension to the auxiliary crawler from the inside of the auxiliary crawler, and the distance A second holding member on which the driven wheel is rotatably mounted to hold the spaced distance, and the auxiliary driving device is disposed on both sides of the driving device, and the auxiliary driving device is provided. A two-wheeled vehicle characterized in that the driving device is configured to be capable of being driven together with the driving of the driving device. A transmission shaft concentrically fixed to the pulley and an auxiliary shaft concentrically fixed to the auxiliary driving wheel are provided, and the transmission shaft and the auxiliary shaft are connected or integrated in series, thereby rotating the driving source. 2. The two-wheeled vehicle according to claim 1, wherein the auxiliary driving wheel is configured to rotate together with the pulley that is rotated via the crawler with a driving force of the driving wheel that can be driven due to power. In the drive device mounted in place of the rear wheel of a two-wheeled vehicle, an intermediate wheel is provided between the drive wheel and the pulley, and the lowermost part of the intermediate wheel has the same height as the lowermost part of the drive wheel. By placing the pulley so that the lowermost surface of the pulley is at a height above the lowermost surface of the intermediate wheel, the grounding range of the crawler can be set from directly below the driving wheel on a flat hard road surface. A two-wheeled vehicle traveling device in which the crawler located immediately below the intermediate wheel is not in contact with the ground. A two-wheeled vehicle traveling device having a structure in which a rim provided as a standard in a two-wheeled vehicle is used when the drive wheel is configured in the drive device attached in place of a rear wheel of a two-wheeled vehicle.