JPS63279979A - Crawler belt type vehicle - Google Patents

Abstract

PURPOSE:To improve gripping force and driving force on the snow, in a crawler type vehicle constructed through utilization of a vehicle such as a truck, by extending rearmost rolling wheel to the rear of a driven wheel. CONSTITUTION:A crawler belt mechanism is mounted dismountably between right/left drive shafts 11 and a rear axle 13 to be supported on a rear bed floor type rear wheel suspension. The drive shafts 11 are driven by engine output transmitted through a differential unit 10 so as to drive driving wheels 21 and circulate a crawler belt 30 in endless. Rearmost rolling wheel 29 is arranged below a driven wheel 27 while being shifted rearward. Since driving face at the rear portion of the crawler belt against snow face is extended rearward, gripping force is increased resulting in improvement of driving force.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a crawler belt type vehicle that uses a truck or a pan type vehicle to constitute a snowmobile or the like.

(Prior art) Since it is difficult or almost impossible for snowmobiles to run on tires, crawler belt type snowmobiles are used. Conventionally, many crawler belt type snowmobiles have been small, and those with a cabin have been used. Large-scale models with a cabin are also in practical use, but the cabin is of a campus type and is usually not equipped with a heater. established,
If a heater or the like is installed, the cost will be extremely high because it is a dedicated vehicle.

(Problem to be Solved by the Invention) By the way, small trucks and pans for transporting cargo equipped with cabins are in practical use, and these types of trucks are provided with front-wheel drive, rear-wheel drive, or even four-wheel drive. If such a vehicle can run on snow, it will be convenient for transporting cargo on snow, and since it is equipped with a heater and a highly rigid sealed cabin, it can be driven without wearing winter clothing.

The present invention has been made in view of the above, and its purpose is to provide a cabin that is highly confidential and advantageous in terms of protection from the cold, which is advantageous in transporting cargo on snow, and to achieve the above by using a small truck, pan, etc. The purpose is to make it possible to plan.

(Means for solving the problem) A means for solving the above problem is to attach a drive wheel to a drive shaft equipped with a differential device of a vehicle, attach a driven wheel to the driven shaft, and A plurality of wheels are arranged between the wheels and the driven wheels, and the wheels and WA! I! The third wheel and the driven wheel are supported by a frame on each side of the vehicle so that they can be attached to and removed from the vehicle, and the rearmost rolling wheel extends behind the driven wheel, and each of these wheels is wrapped with a crawler belt. The reason is that it is rotated.

(Operation by the above means) According to the above means, the driving and driven wheels supported by the frame,
By attaching wheel units to both sides of the vehicle and wrapping crawler belts around it, it can be turned into a snowmobile.Also, the rearmost wheel is extended further back than the driven wheels, making it easy to drive on snow. Improves grip and driving force.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a side view of the vehicle according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is an explanatory cross-sectional plan view showing the drive mechanism, and FIG.
The figure is an explanatory cross-sectional plan view showing another embodiment of the drive mechanism.

The vehicle 1 is, for example, a small, small-displacement truck, a so-called light truck, and is equipped with a cabin 2 at the front and a loading platform 3 behind it. 3 has a three-way opening that allows the left, right, and rear gates 5 to be spaced apart, and has two front wheels and two rear wheels, and usually forms a truck to run on general roads, so the cabin 2
Inside, a handle 6 and air conditioning equipment such as a heater are provided.

The vehicle 1 described above is, for example, a front-wheel drive vehicle, and the front and rear wheels are removed and a crawler belt mechanism is installed.

The engine 7 is installed under the floor behind the cabin 2, and a drive shaft 9 extends forward from a transmission 8 attached to the engine 7, and is inputted to a differential gear 10 below the cabin 2. Drive shafts 11 and 11 extend perpendicularly to the vehicle body axis on the left and right sides of the differential gear 10, and the two drive shafts are suspended on the vehicle body side via knuckles, etc., and the front wheels are usually attached to the drive shafts. .

It takes a lot of left and right driving! 1ith11. A crawler belt mechanism is removably mounted between the left and right rear axles 13 supported by the if and the floor-type rear wheel suspension system at the rear of the loading platform, for example, leaf springs 12. Drive shaft 11. It has drive wheels 21.
21 are connected to each other, the drive wheels 21 face upward, and an upper bracket 2 is provided that protrudes forward on the front part of the support frame 22.
3 is rotatably supported. The support frame 22 is long in the front and back, and has a plurality of stays 24 at a predetermined pitch in the front and back direction.
is installed hanging down, and the rollers 25... are installed on the stays 24...
are supported rotatably. An upper hestie 26 is protruded from the rear of the frame 22, and a driven shaft 13 is provided on the stay 26.
A driven wheel 27 connected to both ends is rotatably supported, and the driven shaft 27 is at the same level as the drive shaft 21. frame 22
An auxiliary stay 28 is installed at the rear of the vehicle so as to tilt backward and downward,
The rearmost roller 29 is rotatably supported on the auxiliary stay 28, and the roller 29 is located behind and below the driven shaft 27. The crawler belt mechanism 20 is configured by winding the crawler belt 30 around the drive wheel 21, the driven shaft 27, the rollers 25, . . . , and the rollers 29 described above. The same crawler belt mechanisms 20 are installed on the left and right sides, and the crawler belt mechanisms 20 protrude outward from the left and right below the vehicle body. A cross member 31 is placed horizontally between the front ends of the frames 22 and 22 described above to connect the two, and the front part 31a of the cross member 31 is
protrudes forward.

Next, to explain the steering device of the crawler belt mechanism, the third
The figure is an explanatory view showing an example of this, in which a bush-pull type cable 16 extends from a gear box 15 at the bottom of a steering shaft 14 of a handle 6. Arms 32 and 33, which are symmetrical in plan view, are pivotally attached to the front part 31a of the cross member 31 described above with pins 32a and 33a,
The forward protrusions 32b and 33b of the arms 32 and 33 are connected and pivoted by a link 34 via pins 34a and 34b. The left and right portions 32c and 33c of the arms 32 and 33 are long, with the end 32c connected to the end of the cable 16 described above, and the intermediate portion connected to the differential gear 1 via the pin 35.
The brake rod 36 of the brake device 10a (not shown) provided on one side of the brake rod 36 is engaged with an elongated hole 36b formed in the tip 36a of the brake rod 36, and the rod 36 has a spring 3 for lost motion in the middle part.
Interpose 7. As the brake device, for example, an inwardly expanding type is used. A pin 38 is provided protruding from the ends of the left and right portions 33c of the other arm 33, and is inserted into a long hole formed in the tip 39a of the brake rod 39 of the brake device 10b (not shown) provided on the other side of the differential device 10. 39b, and the rod 39
A spring 40 for lost motion is interposed in the intermediate portion.

In the figure, numerals 41 and 42 indicate brake pedals.

In the above, the drive shaft 11.11 is driven by the engine output via the differential device 10, and the drive wheels 21.21 are driven. As a result, the crawler belt 30.30 makes an endless circular motion between the driven wheels 27.27 supported by the driven shaft 13, and this endless circular motion is guided and supported by the rolling wheels 25..., 29.

By the way, the trailing wheel 29 is located below the driven wheel 27 and is biased rearward, so that the driving surface of the rear part of the crawler belt against the snow surface is extended rearward, which increases the gripping force and increases the slope. In particular, on uphill slopes, the crawler belt part extending rearward from the driven wheels 27 supports the load applied to the rear, and this part circulates and drives to increase the driving force, and the driving force of the vehicle is increased even on steep slopes on snow. can be increased.

In the above steps, steering is performed by rotating the handle 6 to the right or left. For example, when the handle 6 is rotated to the right, the arm 32 is swung clockwise in FIG.
is pushed six times upward in the figure, and the arm 33 connected thereto is made to swing clockwise about the pin 33a as a fulcrum. The swing of the arm 33 is transmitted to the tip 39a of the rod 39 by the engagement between the pin 38 and the elongated hole 39b, and the elongated hole 39b and the pin 38
Since this direction is the engagement direction, the rod 39 is pulled, and the brake device 10a on the right side works to brake the drive shaft 11A on this side, and the drive wheel 21A on the right side is decelerated.
It will be steered to the right. The braking of the brake device 10b accompanying the above-mentioned steering is performed through lost motion action by the spring 40, and sudden braking is prevented.

In this case, the engagement between the pin 35 of the other arm 32 and the elongated hole 36b provided in the tip 36a of the rod 36 is in the escape direction and does not contribute to braking. When the handle 6 is rotated to the left, the operation is reversed to the above, and the steering wheel is steered to the left.

FIG. 4 is an explanatory diagram showing a modified embodiment of the steering mechanism, in which an engager 17 is connected to a pinion shaft 16 of a gear box 15 connected to a steering shaft 14 rotated by a handle 6.
is provided in a protruding manner, and the engaging element 17 is engaged with a long hole 131a formed at one end of the operating arm 131.

Under the floor of the vehicle 1, an intermediate shaft 132 is rotatably mounted horizontally on a support frame 133, and the shaft 132 passes through the front part 133a of the support frame 133 and is supported by a bearing 134, and a sprocket is attached to one end of the intermediate shaft 132. 135 is connected to the sprocket 136 which is connected to the end of the driven shaft 13A in the example, via a chino 137, and the sprockets 135, 136, the chino 137
is covered with Cheno Case 138. A variable pulley 139 consisting of a fixed face 139a and a movable face 139b is provided on a portion extending from the front portion 133a of the support frame 133 of the intermediate shaft 132, and a pin 140 is provided on the cylindrical boss portion 139c of the movable face 139b. The operating arm 131 is engaged with the elongated hole 131b formed in the rear part of the operating arm 131 described above, and the operating arm 131 is pivotally supported at its intermediate portion by a pin 141, and is swingable about the pin 141 as a fulcrum in a plan view. 1
A shaft end 132a on this side of 32 is rotatably supported by a boss 18 on the vehicle body side.

The rear part 133b of the support frame 133 supports a speed change shaft 142, and a variable pulley 143 consisting of a fixed face 143a and a movable face 143b is provided in the middle of the speed change shaft 142. are installed with the left and right reversed. A return spring 144 is interposed between the movable face 143b and the rear part 133b of the support frame 133, and a sprocket 145 is connected to the extending end of the speed change shaft 142 on the pulley side, and the sprocket 145 is connected to the driven shaft 13B on this side. Cheno 1 to sprocket 146 connected to
47, and the sprockets 145, 146 and chino 147 are covered with chino case 148.

In the above, the left and right drive shafts 11.11 of the differential device 10
The driving wheels 21.21 are driven, and as a result, the crawler belt 30.30 endlessly circulates between it and the driven wheels 27.27, and the endless circular movement is guided by the rollers and the driven wheels 27.27 also rotate. As a result, the sprockets 136 and 137 are rotated via the shafts 13A and 13B, and the sprockets 135 and 147 are rotated by the chains 137 and 147. The rotation of the sprocket 145 is transmitted from the speed change shaft 142 to the pulley 143, and a V-belt 149 is wound in advance between the pulley 143 and the pulley 139.
The rotation is transmitted to 39. When the vehicle is running straight, the sprocket 135 and pulley 139 input to the intermediate shaft 132 in synchronization.

By the way, when you turn the handle 6 to the right or left, the rack 16
moves left and right, and as a result, the arm 131 swings left and right,
The movable face 139b of the variable pulley 139 is slid from side to side on the shaft 132. This allows the belt 14
9 is expanded or contracted in diameter, and the intermediate transmission shaft 14
2 is accelerated or decelerated, and as a result, the driven shaft 27 is accelerated or decelerated by the shaft 13B via the sprocket 146 connected to the sprocket 145 and the chevron 14, and the drive wheels 21, 21 is a drive shaft 11 with a differential device.
11, a differential occurs between the left and right sides, and the vehicle is steered toward the lower speed crawler belt.

(Effects of the Invention) As is clear from the above, according to the present invention, the wheels of a vehicle such as a light truck or a pan-type truck equipped with a cabin are removed and the crawler belt mechanism is installed. A snowmobile was obtained,
This is achieved by attaching a crawler belt mechanism attachment to a snowmobile with a cabin equipped with an extremely expensive air conditioning system that was previously difficult or custom-made. The last wheel is placed rearward and downward relative to the driven wheels, which provides excellent treading performance when driving on snow, etc., and the steering system has a simple configuration, making it possible to use the vehicle's steering system. There are advantages such as obtaining.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a side view of the vehicle, FIG. 2 is a front view of the vehicle, FIG. 3 is an explanatory plan view showing the steering device, and FIG. The figure is an explanatory plan view of a modified embodiment of the steering device. In the drawings, 1 is a vehicle, 10 is a differential gear, 11° 11 is a drive shaft, 13.13A, 13B are driven shafts, 21 is a driving wheel, 27 is a driven wheel, 25.29 is a rolling wheel, and 22 is a frame. , 30 is a crawler belt. M2 figure

Claims (1)

[Claims] A drive wheel is attached to a drive shaft equipped with a differential device of a vehicle, a driven wheel is attached to the driven shaft, a plurality of rolling wheels are arranged between the driving wheel and the driven wheel, the rolling wheels and the driving wheel,
The driven wheels are supported by a frame on each of the left and right sides of the vehicle so that they can be attached to and removed from the vehicle, and the rearmost rolling wheels extend behind the driven wheels, and each of these wheels is wound with a crawler belt. A crawler belt type vehicle characterized by: