JPH0597084A - Motorcycle for riding on rough terrain - Google Patents

Abstract

(57) [Summary] [Purpose] For running on rough terrain that avoids falling off the drive wheel tires or idle wheel tires of the endless track, and avoids damage to the tires, and further improves running stability. Providing a motorcycle. [Structure] The three-wheeled motor vehicle 20 for traveling on rough terrain is basically
The main body portion 22, the endless track portion 24, and the steering portion 26
Composed of and. The endless track drop-out preventing mechanisms 42a to 42d arranged on the endless track portion 24 are
It is composed of a plurality of tire holding members 70a to 70d that cover the entire circumference of a and 40b without interruption, first elongated members 74a to 74d, and second elongated members 76a to 76d. One end of the first elongate member 74a is pivotally attached to the tire holding member 70a, and the other end is attached to one end of the second elongate member 76a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-wheeled motor vehicle for running on rough terrain, and more particularly, to prevent falling and damage from a drive wheel tire or an idle wheel tire on an endless track and improve running stability. The present invention relates to a tricycle for traveling on rough terrain.

[0002]

2. Description of the Related Art Conventionally, a vehicle such as a motocross vehicle or a four-wheel drive vehicle has been used as a means for displacing so-called rough terrain such as a wasteland, a wetland, a snowy field, a sandy land, etc.

However, since the area where the wheels of the vehicle come into contact with the rough terrain is smaller than its own weight, it becomes easy to get into the rough terrain as the traveling conditions on the rough terrain deteriorate, and from there. It will be quite difficult to escape, so
The inconvenience that the traveling cannot be continued is exposed.

In order to avoid the above-mentioned inconvenience, vehicles equipped with endless tracks, such as snowmobiles, snowmobiles and bulldozers, are used on rough terrain with poor driving conditions. Although this type of vehicle can obtain stable drivability even on rough terrain under poor driving conditions, its structure is large and complicated, so it requires considerable proficiency in driving and maintenance, etc. It was difficult to handle.

Therefore, on rough terrain in which poor traveling conditions are unavoidable, even a vehicle equipped with the above-mentioned endless track can provide stable traveling performance, and its structure is small and simple, and driving operation is possible. In addition, the appearance of vehicles that are easy to handle, such as maintenance, was sought after.

In response to the above request, Japanese Patent Laid-Open No. 60-143
No. 189 discloses the technical concept of "vehicle for running on rough terrain". As shown in FIG. 6, the rough terrain vehicle 2 has rear wheels 4, a support arm 8 is provided behind the vehicle body frame 6, and a support shaft is provided at the rear end of the support arm 8. 12 are provided, and a pair of idle wheels 10 is provided at both ends of the idle wheel 10.
And the endless track 14 is suspended between both the rear wheel 4 and the idle wheel 10.

[0007]

The rough terrain vehicle 2 has a small size and a simple structure, and therefore its own weight is also light.

As a result, for example, the rough terrain vehicle 2
First, as shown in FIG. 7, the inner peripheral surface 14a of the endless track 14 is contacted with the left and right endless tracks 14 due to the contact of the left and right endless tracks with each other on uneven terrain when traveling on a rough terrain. The contact state with the rear wheel 4 or the portion of the idle wheel 10 that should originally contact is released. At this time,
Since the contact area between the inner peripheral surface 14a of the endless track 14 and the rear wheel 4 or the idle wheel 10 is reduced, the driving force transmitted to the endless track 14 is also reduced and the running stability is reduced.

Then, for example, in the case where it takes a considerably longer time to pass through an uneven terrain having a particularly inferior concave-convex state than that required to pass through another uneven terrain having the same distance, as shown in FIG. Wheel 4 or idle wheel 1
An unnecessarily large load is intensively applied only to a very narrow portion where 0 abuts on the inner peripheral surface 14a of the endless track 14, and the abutting portion is damaged.

Further, the rear wheel 4 is deformed due to damage.
Alternatively, there is a concern that the endless track 14 may drop from the idle wheel 10 and it may be impossible to continue traveling.

Accordingly, an object of the present invention is to remove a tire from a drive wheel tire or an idle wheel tire of an endless track in an all-terrain vehicle equipped with an endless track, which is a means for moving on an uneven terrain and a means for transporting goods. It is an object of the present invention to provide a three-wheeled vehicle for running on rough terrain, which avoids damage to the tire due to this drop and further improves running stability.

[0012]

In order to solve the above-mentioned problems, the present invention provides a pair of driving wheel tires, a pair of idle wheel tires arranged behind the driving wheel tires, and the above-mentioned one end of the tires. A support arm that supports a drive shaft that pivotally mounts a drive shaft tire and that supports an idle wheel shaft that pivotally mounts the idle wheel tire at the other end, a damper that supports the main body and the idle wheel shaft, and the drive wheel tire. And an idle wheel tire, and an endless track drop-out prevention mechanism for sandwiching the drive wheel tire and the idle wheel tire from both side surfaces.

[0013]

In the three-wheeled motor vehicle for running on rough terrain according to the present invention, the tire holding plate material is circumferentially provided on both sides of the endless track so as to cover both side surfaces of the drive wheel tire and the idle wheel. As a result, it is possible to prevent the endless track from separating from the drive wheel tires or the idle wheel when traveling on rough terrain.
You can prevent them from being damaged.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, preferred embodiments of the three-wheeled vehicle for traveling on uneven terrain according to the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, reference numeral 20 indicates a three-wheeled vehicle for traveling on rough terrain. The tricycle for traveling on rough terrain 2
0 is basically the main body portion 22, the endless track portion 24,
And a steering unit 26.

The main body portion 22 includes a driving force generating means, a driving force transmitting means, a speed changing means, an electric equipment means, a control means, etc. (not shown) for appropriately running the three-wheeled vehicle 20 for running on rough terrain on the frame body. Various transportation means are installed. The operation means is improved in aesthetics, dust, water drops,
It is surrounded by a cover member 30 in order to prevent snow, mud, etc. from adhering to the surface of the operation means and from entering the inside of the operation means to cause deterioration of mechanical life and performance. Also,
The main body 22 is provided with a driver's seat 32 on which a driver is seated and a loading platform 28 for loading luggage or the like.

The steering portion 26 for changing the traveling direction of the three-wheeled vehicle 20 for traveling on rough terrain is basically composed of a front wheel tire 33, a steering handle 34, and a front fork 36. Front fork 3
A front wheel tire 33 is sandwiched between U-shaped portions at one end of 6 and is rotatably supported by flange bolts or the like. A suspension (not shown) is incorporated in the front fork 36 to cushion the impact from uneven terrain. Further, the steering handle 34 is provided with operation instruction means such as a clutch lever 34a, a brake lever 34b, a blinker blinking device 34c, a starter 34d, and a steering handle cover 35 for covering electric wiring, hydraulic wiring and the like. Various meters 36 such as a speedometer, a tachometer, and an oil amount meter are centrally arranged. Furthermore, a headlight 38 is incorporated on the traveling direction side of the steering handle cover 35.

Next, the endless track portion 24 will be described.

The endless track portion 24 is disposed below the loading platform 28 behind the main body portion 22 and basically right and left with respect to a center line parallel to the traveling direction of the three-wheeled motor vehicle 20 for traveling on uneven terrain. It has endless tracks 40a and 40b arranged symmetrically. On both sides of the endless track 40a, endless track drop-out prevention mechanisms 42a and 42b are provided, and the endless track 40b is provided.
Similarly, on both sides of the
d is provided around.

The endless tracks 40a, 40b include a pair of drive wheel tires 44a, 44b and the drive wheel tires 44a, 44b.
Idling wheel tire 46 disposed behind 44b
It is wound between a and 46b. Drive wheel tire 44a,
44b is attached to both ends of the drive shaft 48, and the idle wheel tires 46a and 46b are attached to the idle wheel shaft 50.
Are attached to both ends of. Also, idle wheel shaft 5
0 and the drive shaft 48 are supported and connected by a pair of connecting rods 52a and 52b axially attached to the drive shaft 48 and the idle wheel shaft 50 on the outside of each of the drive wheel tires 44a and 44b and the idle wheel tires 46a and 46b. Has been done. The connecting rods 52a, 52b are connected to the endless tracks 40a, 4
0b for adjusting the tension state for adjusting the tension state of 0b
4a and 54b are drilled. On the other hand, the idle wheel shaft 50 includes a damper 6 vertically mounted on the lower surface of the main body 22.
Supported by 4.

The damper 64 has a hydraulic or spring type suspension 66 for absorbing and buffering the unevenness of uneven terrain in the vertical direction, and the connecting portion between the damper 64 and the idle wheel shaft 50. In the endless track 40
Between left and right between a and track 40b, or track 4
A universal joint 68 is attached to absorb and buffer the unevenness of uneven terrain that occurs between the leading and trailing ends of 0a and 40b.

The drive shaft 48 has an endless track 40a,
The driving force for rotating 40b is transmitted from a driving source (not shown) such as an internal combustion engine by a driving force transmitting means such as a shaft drive or a chain.

The endless tracks 40a and 40b are essentially composed of a plurality of plate-like members 56 made of metal or hard synthetic resin. As shown in FIG. 2, the plate-like body 56 has a concave portion 56a formed on one side, and a convex portion 56b fitted to the concave portion 56a is provided on the other side opposite to the one side. Further, communication holes 60a and 60b for loosely fitting the connection pins 58 to connect the plate-shaped bodies 56 are provided along the extending direction of the recesses 56a and the projections 56b. Further, if necessary, an anti-slip member 62 may be provided so as to project on one side surface of the plate-shaped body 56 that is an outer peripheral portion of the endless tracks 40a, 40b. Furthermore, if necessary, the endless trajectories 40a, 40b.
The driving wheel tires 44a, 44b and the idle wheel tire 4 are also provided on the other side surface of the plate-shaped body 56 which is the inner peripheral portion of the tire.
It is also possible to provide a protrusion 63 for avoiding idling between 6a, 46b and the endless tracks 40a, 40b (see FIG. 3).

Therefore, the endless trajectories 40a and 40b are
A predetermined number of plate-like bodies 56 are used, which are wound between the driving wheel tires 44a and 44b and the idle wheel tires 46a and 46b and correspond to the distance between them. The convex portion 56b is fitted into the concave portion 56a of each of the communication holes 60a and 60b.
It is configured by loosely fitting one connecting pin 58 to the. A split pin 65 is inserted into the connecting pin 58 at the portion projecting to the outer side of the recess 56a to prevent removal.

Next, the endless track drop-out prevention mechanisms 42a, 4
2b, 42c, and 42d will be described. As shown in FIGS. 2 and 3, the endless track drop-out prevention mechanisms 42a, 4
2b is provided on both sides of the circumferential portion of the endless track 40a, and the fall prevention mechanisms 42c and 42d are provided on both sides of the circumferential portion of the endless track 40b. The endless track dropout prevention mechanism 42a and the endless track dropout prevention mechanisms 42b to 42d.
Have substantially the same structure and exhibit the same operation and effect. Therefore, in the following description, the endless track drop-out prevention mechanism 42a will be used for explanation.
The description of 2b to 42d is omitted.

The crawler track drop-out prevention mechanism 42a basically comprises a plurality of tire holding members 70a for covering the entire circumference of the crawler track 40a without interruption, and a first standing up member.
Long member 74a and second long member 7 connected thereto
6a.

The tire holding member 70a is fixed to the side surface of the plate-like body 56 with a screw bolt 78 or the like.

One end of the first elongated member 74a is pivotally attached to the tire holding member 70a and rises up, and the second elongated member 76a.
The a is engaged with one end of the tire holding member 70a and is also axially attached to another tire holding member 70a (see FIG. 4). Therefore, the first elongate member 74a and the second elongate member 76a form a so-called angle structure that is bent at a predetermined angle.

The first elongate member 74a and the second elongate member 76a may connect the tire holding members 70a adjacent to each other depending on the condition of running rough terrain, the type of tire, and the like. It is also possible to bridge every other tire holding member 70a.

Therefore, the drive wheel tire 44a and the idle wheel tire 46a are sandwiched by the crawler track drop-out prevention mechanism 42a configured as described above.

The three-wheeled motor vehicle 2 for traveling on rough terrain according to this embodiment
0 is basically configured as described above,
Next, its operation and effect will be described.

When traveling on an uneven terrain using the above-mentioned three-wheeled vehicle 20 for traveling on an uneven terrain, first, a drive source such as an internal combustion engine (not shown) mounted on the frame body by the starter 34d provided on the steering handle 34. To get the driving force. This driving force is converted into a driving force that can obtain a torque suitable for traveling on the rough terrain by rotating the endless tracks 40a and 40b by a transmission means (not shown). Then, by driving force transmission means such as a shaft drive and a chain surrounded by the cover member 30, the driving wheel tires 44a and 44b that are transmitted to the drive shaft 48 of the endless track portion 24 and are axially attached to the drive shaft 48 are driven. The drive wheel tires 44a, 44b and the idle wheel tires 46a, 46
By rotating the endless tracks 40a, 40b wound between the track b and the track b, traveling on an uneven terrain is started.

At this time, as shown in FIG. 5, when the traveling conditions on the rough terrain to be traveled are extremely poor, for example, it is particularly noticeable between the left and right between the endless track 40a and the endless track 40b or between the tip and the tail. Even if there are irregularities or height differences, first, the suspensions 66 and the universal joints 68 arranged on the damper 64 respectively provide the endless tracks 40a,
The endless track portion 24 itself is tilted in the front-rear direction and the left-right direction in response to the complicated unevenness of the uneven ground with which 40b abuts and the height difference between the front and rear and the left and right. As a result, the outer peripheral surfaces of the endless tracks 40a, 40b can contact the rough terrain surface with the largest area as a whole in a tilted state, so that a drastic decrease in traveling performance is avoided and traveling stability is improved. Can be maintained. Since the anti-slip member 62 provided on the outer peripheral surface of the plate-like body 56 forming the endless tracks 40a and 40b can increase the frictional resistance with the abutting uneven ground,
It improves straight running performance and helps improve running stability.

Further, either one of the endless tracks 40a, 40b comes into contact with a portion having a very small area such as the edge 80 of the rough terrain and the plate-like body 56 forming the endless tracks 40a, 40b.
Even when the lever mechanism is configured with the edge 80 of the rough terrain as a fulcrum, the drive wheel tires 44a and 44b and the idle wheel tires 46a and 46b are sandwiched by the endless track drop-out prevention mechanisms 42a and 42b. In addition, the contact state between the inner peripheral surfaces 41a and 41b of the endless tracks 40a and 40b and the drive wheel tires 44a and 44b and the idle wheel tires 46a and 46 is ensured.

Further, since the disengaged state as shown in FIG. 7 is avoided, the drive wheel tires 44a, 44b or the idle wheel tires 46a, 46b are connected to the endless track 40.
It is also avoided that the abutting portions of the inner peripheral surfaces 41a and 41b of the a and 40b come into contact with extremely narrow abutting portions, and a load more than necessary is intensively applied, and the abutting portions are damaged.

Further, even when the surface of a specific portion of the drive wheel tires 44a, 44b or the idle wheel tires 46a, 46b is worn and deformed, the endless track drop preventing mechanisms 42a to 42d are used to form the endless tracks 40a, 40b.
However, it is prevented from dropping from the drive wheel tires 44a, 44b or the idle wheel tires 46a, 46b.

[0037]

As described above, in the three-wheeled vehicle for traveling on rough terrain according to the present invention, the track disengagement preventing mechanism is provided at the circumferential portion of the track, and the universal joint is provided at the damper. As a result, it is possible to prevent the damage to the drive wheel tires or the idle wheel tires and the falling of the endless track from the drive wheel tires or the idle wheel tires, thereby improving the running stability.

Therefore, the present invention provides a suitable three-wheeled vehicle for traveling on rough terrain, which is a compact and simple structure and is provided with an endless track as a means for transporting goods, as a means for moving on rough terrain with improved traveling stability. be able to.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a three-wheeled vehicle for traveling on rough terrain according to the present invention.

FIG. 2 is a partial plan explanatory view of a plate-like body that constitutes an endless track of a three-wheeled vehicle for traveling on rough terrain according to the present invention.

FIG. 3 is a partial vertical cross-sectional view of an endless track of a three-wheeled vehicle for traveling on rough terrain according to the present invention.

FIG. 4 is a schematic diagram of an endless track drop-out prevention mechanism provided on an endless track of a three-wheeled vehicle for traveling on rough terrain according to the present invention.

FIG. 5 is a side explanatory view showing the time of traveling on an uneven terrain in the embodiment of the tricycle for traveling on an uneven terrain of the present invention.

FIG. 6 is a perspective view showing an off-road vehicle according to a conventional technique.

FIG. 7 is a conceptual diagram showing a contact state between an uneven terrain and an endless track when a vehicle for traveling on an uneven terrain according to a conventional technique is running.

[Explanation of symbols]

 Reference numeral 20 ... Rough-terrain traveling tricycle 22 ... Main body portion 24 ... Endless track portion 26 ... Steering portion 40a, 40b ... Endless track 42a-42d ... Endless track dropout prevention mechanism 44a, 44b ... Drive wheel tire 46a, 46b ... Idle wheel tire 56 ... Plate-like body 62 ... Anti-slip member 64 ... Damper 66 ... Suspension 68 ... Universal joint 70a-70d ... Tire holding member 74a-74d ... 1st elongate member 76a-76d ... 2nd elongate member

Claims (2)

[Claims] 1. A pair of drive wheel tires, a pair of idle wheel tires disposed behind the drive wheel tires, a drive shaft for pivotally mounting the drive shaft tires on one end, and the idler on the other end. A support arm that supports an idle wheel shaft that pivotally mounts a wheel tire, a damper that supports the main body portion and the idle wheel shaft, and an endless track wound between both the drive wheel tire and the idle wheel tire, A three-wheeled motor vehicle for running on rough terrain, comprising: a track loss preventing mechanism for sandwiching the drive wheel tire and the idle wheel tire from both sides. 2. A three-wheeled vehicle for traveling on rough terrain according to claim 1, wherein a damper for supporting the idle wheel shaft is provided on a main body of the motorbike for traveling on an uneven terrain, and the damper and the idle wheel shaft. A three-wheeled motor vehicle for running on rough terrain, which is connected to the joint through a universal joint.