JPH088891Y2 - Tire driven crawler belt - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a crawler belt made of a flexible material such as rubber that is hung on a plurality of wheel tires. It relates to the shape.

[Prior Art] An off-road vehicle equipped with a tire-driven crawler belt device in which a plurality of wheel tires are covered with rubber crawler belts is known from Japanese Utility Model Publication No. 52-28258. Protrusions extending in the belt width direction are provided on the inner peripheral surface of the crawler belt at relatively large intervals in the belt longitudinal direction. Also, the technique of Japanese Utility Model Laid-Open No. 64-48306 (slip prevention belt mounting structure for a truck) is disclosed, and the technique is, as shown in FIGS. Middle rear wheel 3,3 and one side 2
The endless belt 5 is hung between the rearmost wheels 4 and 4 of the series, and the central portion of the endless belt 5 is pressed by the tension roller 6 to increase the ground contact area and prevent slippage with the road surface. is there.

[Problems to be Solved by the Invention] In a conventional tire-driven crawler belt, water, mud, or the like may enter between the tread surface of the tire and the inner peripheral surface of the crawler belt when traveling on soft land such as farmland. Especially, since water, mud, etc. adhere to the inner peripheral surface of the crawler belt and are difficult to be discharged, this has been a factor causing slip between the tire and the crawler belt.

SUMMARY OF THE INVENTION An object of the present invention is to provide a tire-driven crawler belt in which the inner peripheral surface of the crawler belt is improved in water-drainage property and mud-drainage property and slippage between the tire and the crawler belt can be avoided.

[Means for Solving the Problems] In order to achieve the above object, the present invention is to install a pneumatic rubber tire having a flat tread surface on a plurality of wheels, and a crawler belt made of a flexible material between the tires. The crawler belt, and an uneven pattern that contacts the tread surface of the tire is formed on the inner peripheral surface of the crawler belt.In the uneven pattern, the crawler belt comes out from the center to the side and is inclined with respect to the longitudinal direction of the crawler belt. A plurality of garters serving as side guides for the tire are arranged on both sides of the crawler belt and between the muddy water drainage escape grooves.

[Operation] A portion of the crawler belt that is hung on the tire bends along the tire. Therefore, in the crawler belt, the groove width of the muddy water discharge escape groove in the curved portion is narrowed. Further, the uneven pattern of the crawler belt is compressed and deformed by the tire, so that the clearance groove for discharging muddy water is pressed. Therefore, water, mud, and the like that enter between the tread surface of the tire and the inner peripheral surface of the crawler belt are forcibly pushed out and discharged outward along the inclination direction of the muddy water escape groove.

Further, since many garters are arranged between the muddy water drainage escape grooves, they do not interfere with drainage and mud drainage from the muddy water drainage escape grooves.

In this way, the drainage property and the mud drainage property of the inner peripheral surface of the crawler belt are improved, so that the occurrence of slip between the tire and the crawler belt is avoided.

[Example] An example will be described below with reference to the accompanying drawings.

1 to 3 showing the configuration of a light truck type crawler belt type six-wheeled vehicle as an application example of the present invention,
1 is a vehicle body, 11 is a front wheel, 13 is a rear wheel, 15 is an idle wheel, and 17 is a crawler belt.

The vehicle body 1 is composed of a cabin 2 and a loading platform 3, and an idle wheel 15 is arranged between a front wheel 11 and a rear wheel 13 as shown in the figure, and rubber pneumatic tires 12, 14, 16 are provided on each wheel. The tires 12, 14 and 16 have flat tread surfaces as shown in FIG. A steering device 5 that transmits a steering force from the handle 4 in the cabin 2 to the pair of left and right front wheels 11, 11 is configured. The steering device 5 includes a steering shaft 6, a gear box 7, a steering arm 8 and a tie rod 9, and the tie rod 9 is connected to a knuckle 21 that supports a front wheel 11. Further, a front suspension 22 for independently suspending and supporting the front wheels 11 with respect to the vehicle body 1 is provided, that is, suspension components such as a radius rod 23 and a hydraulic damper 24 are provided between the underside of the cabin 2 of the vehicle body 1 and the knuckles 21 for the front wheels. Has been done.

On the other hand, an engine 25 is mounted and supported under the loading platform 3 of the vehicle body 1, and the rear wheel 13 and the idle wheel are provided on both left and right sides of the engine 25.
15 are arranged. A rear wheel drive device 26 that transmits the rotational driving force from the transmission integrated with the engine 25 to the pair of left and right rear wheels 13, 13 is configured. The rear wheel drive device 26 includes a differential device 27 at the rear of the engine 25 and a rear wheel drive shaft 28, and the rear wheel drive shaft 28 is connected to a rear wheel axle 29 supported at the rear part of the swing beam 31.

The rear wheel 13 and the idler wheel 15 in front of the rear wheel 13 are supported by the swing beam 31, and the swing beam 31 is attached to the vehicle body 1.
Is provided with a rear suspension 32 for independent suspension support. That is, the central portion of the swing beam 31 is swingably connected to a leaf spring 33 installed under the cargo bed 3 of the vehicle body 1, and hydraulic dampers 34, 35 are installed between the front and rear portions of the swing beam 31 and below the cargo bed 3. Further, a torsion-free axle beam 36 is installed between the left and right swing beams 31 and 31 rear portions. In the figure, 36a is the axle beam 3
6 Torque canceling part at the center, 37 is leaf spring 3
3 Stopper rubber on center, 38 is leaf spring 3
3 Shackle at the rear end.

Further, a rubber crawler belt 17 is mounted on the rear wheel tires 14 and the idle wheel tires 16.
On both sides of the tread portion 18 of 17, there are provided a large number of garters 19 ... An eccentric hub carrier 41 is provided at the front of the swing beam 31, and the hub carrier 41 has a freewheel axle.
39 are supported. By eccentrically rotating the hub carrier 41 supporting the idle wheel axle 39, the crawler belt 17
Tension adjustment is performed. The crawler belts 17, 17 described above are accommodated within the widthwise dimension of the vehicle body 1.

Further, a front wheel drive device 42 is configured to transmit the rotational driving force from the transmission integrated with the engine 25 to the pair of left and right front wheels 11, 11. The front wheel drive device 42 includes a propulsion shaft 43 extending forward of the engine 25, a differential device 44, and front wheel drive shafts 45, 45.
The front wheel drive shaft 45 is connected to the front wheel axle 46 supported by the knuckle 21. In the figure, 47 is a fuel tank, 48 is a battery, and 49 is a muffler.

The above crawler belt type six-wheeled vehicle has the grounding driving force by the left and right crawler belts 17,17 and the grounding driving force by the front tires 12,12, and can be used not only on general roads but also on soft ground such as farmland, sand, and snow. Excellent in running performance on rough terrain. Since the crawler belt 17 is housed within the widthwise dimension of the vehicle body 1, the crawler belt 17 does not project to the side of the vehicle body 1, and the compactness can be obtained without increasing the overall width of the vehicle, and the type certification of a light vehicle can be obtained. Further, it can be driven on a relatively high bundle on a public road like a general vehicle, and can be used as a vehicle for transporting materials such as agricultural machines and fertilizers especially when the vehicle is driven into farmland.
In addition to suspending the front wheels 11 independently, the crawler belt 17
Since the rear wheel 13 and the idler wheel 15 for hanging the vehicle are also independently suspended, the ride comfort is excellent.

In the above, the tire driven crawler belt of the present invention
The concave-convex pattern shape provided on the inner peripheral surface of 17 is shown in FIG.

That is, the block-shaped convex portion 51 is located on the center line CL of the crawler belt.
, Which is a trapezoid in the embodiment.
The bottom sides and the top sides of the ribs are alternately arranged laterally, and rib-shaped convex portions 53 ..., 53 ... Are formed on both sides thereof.
The left and right rib-shaped protrusions 53 ... 53 extend in the longitudinal direction of the crawler belt 17, and the rib-shaped protrusions 55 ...
Forming 55 ...

Then, the left and right slanting concave grooves 61, 61, which are muddy water drainage escape grooves that cross diagonally including the crawler belt center line CL as a boundary, are alternately formed. That is, a concavo-convex pattern that contacts the tread surfaces of the tires 14 and 16 is formed on the inner peripheral surface of the crawler belt 17, and in the concavo-convex pattern, inclined concave grooves 61 ..., 61 ... Provided.

In the figure, 63 is a block-shaped convex portion 51 and a rib-shaped convex portion on the side thereof.
Longitudinal grooves between 53 and 65 are longitudinal grooves between the rib-shaped convex portions 53 and 55. Two ribs 54, 54 are formed on the rib-shaped convex portion 53 along the inclined concave groove 61, and a single siving 56 is also formed on the rib-shaped convex portion 55 along the inclined concave groove 61. ing.

On the other hand, a large number of garters 19 serving as side guides for the tires 14 and 16 are arranged on both sides of the crawler belt 17 and between inclined concave grooves (muddy water drainage escape grooves) 61 as shown in FIG. There is. That is, the garters 19 arranged on the left side of the crawler belt 17 are along the outer surface of the rib-shaped convex portions 55 on the left side. Each garter 19 arranged on the right side of the crawler belt 17 extends along the outer surface of the rib-shaped convex portion 55 on the right side.

In FIG. 4 showing the above concavo-convex pattern, the direction of rotation of the tires 14, 16 when the vehicle is moving forward is the arrow direction, that is, the inclined concave grooves 61, ...
It is more inclined toward the tire rotation direction.

Tires with no tread pattern in the example vehicle 14, 16
The tread surface of the tires 14 and 16 and the crawler belt 1 are used when the vehicle is moving forward on soft ground such as farmland.
7 Even if water, mud, etc. enter between the inner surface and each tire 14,
By the rotation of the crawler belt 17, the crawler belt 17 can be discharged outward along the inclined concave grooves 61, 61 ... Which draw a so-called arrow-shaped pattern.

That is, in the crawler belt 17, the portions hooked on the tires 14 and 16 curve along the tires 14 and 16. For this reason,
In the crawler belt 17, the groove width of the inclined concave grooves 61 ... Further, the concave and convex pattern of the crawler belt 17 is compressed and deformed by the tires 14 and 16 so that the inclined concave groove 61 is formed.
... is oppressed. Therefore, water, mud, and the like that enter between the tread surfaces of the tires 14 and 16 and the inner peripheral surface of the crawler belt 17 are forcibly pushed out, and outward along the inclination direction of the left and right inclined concave grooves 61. Is discharged.

Further, the large number of garters 19 ... Are arranged between the left and right inclined concave grooves 61 ... Grooves, so that the drainage and mud drainage from the inclined concave grooves 61.

Therefore, the inner peripheral surface of the crawler belt 17 has excellent drainage properties and mud drainage properties, and the occurrence of slip between the tires 14 and 15 and the crawler belt 17 can be avoided, and the driving force can be effectively transmitted to the crawler belt 17.

Here, the pattern shape formed on the inner peripheral surface of the crawler belt 17 is not limited to that of the embodiment, and any appropriate shape can be adopted, and the essential point is to provide the concave grooves 61 ... Inclined with respect to the longitudinal direction of the crawler belt 17.

Although the present invention is applied to the light truck type crawler belt type six-wheeled vehicle in the embodiment, the present invention is also applicable to a crawler belt vehicle based on a light vehicle such as a one-box type vehicle or other types of vehicles. Is. Further, the arrangement of the idler wheels and the rear wheels may be reversed. The crawler belt and the tire may be made of other flexible material such as rubber,
The tire does not have to be a pneumatic tire. Further, the present invention is also effective for a crawler belt driven by a tire having an appropriate tread pattern.

[Advantage of the Invention] As described above, according to the present invention, pneumatic tires having flat tread surfaces are mounted on a plurality of wheels, and a crawler belt made of a flexible material is hung between the tires. A concave-convex pattern that contacts the tread surface of the tire is formed on the inner peripheral surface of the crawler belt. By providing, the groove width of the muddy water drainage escape groove is narrowed in the curved portion of the crawler belt curved along the tire. Further, the uneven pattern of the crawler belt is compressed and deformed by the tire, so that the clearance groove for discharging muddy water is pressed. For this reason, water, mud, and the like that have entered between the tread surface of the tire and the inner peripheral surface of the crawler belt are forcibly extruded and discharged outward along the inclination direction of the muddy water discharge escape groove.

In addition, since many garters that serve as side guides for the tires are arranged on both sides of the crawler belt and between the muddy water drainage escape grooves, the garters interfere with drainage and mud drainage from the muddy water drainage escape grooves. There is no.

Therefore, the drainage property and the mud drainage property of the inner peripheral surface of the crawler belt are improved, and the occurrence of slip between the tire and the crawler belt can be avoided.

Generally, between the flat tread surface of a rubber pneumatic tire and the inner peripheral surface of a crawler belt made of a flexible material, the driving force is transmitted by the frictional resistance between the two. Since the frictional resistance decreases when water, mud, etc. enter in, it is not easy to improve the driving force transmission performance. However, according to the present invention, the inner peripheral surface of the crawler belt has good drainage property and mud drainage property, so that it is possible to avoid the occurrence of slip and improve the driving force transmission performance.

Also, when a muddy water drainage escape groove is provided on the tire tread, the unevenness pattern of the tread and the crawler belt should not be obstructed when the crawler belt is installed in order not to impede the drainage and mud drainage properties of the muddy water drainage escape groove. It is necessary to align with a large number of garters, and the work of wearing the crawler belt is troublesome. However, according to the present invention, since the crawler belt is provided with the escape groove for discharging muddy water and a large number of garters in consideration of the mutual arrangement relationship, when the crawler belt is attached to the tire, the garter discharges muddy water. Since it is not necessary to perform alignment so as not to impair the water drainage property and the mud drainage property of the escape groove, it is extremely easy to install the crawler belt.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a crawler belt type six-wheeled vehicle as an application example of the present invention, FIG. 2 is a side view showing a drive unit and a suspension thereof, FIG. 3 is a plan view of the same, and FIG. It is a development view showing the shape of the concavo-convex pattern provided on the inner peripheral surface of the tire driven crawler belt according to the present invention. In the drawings, 13 and 15 are wheels, 14 and 16 are tires, 17 is a crawler belt, 19 is a garter, 51, 53 and 55 are convex portions, and 61 is a muddy water discharge escape groove (inclined concave portion).

Claims (1)

[Scope of utility model registration request] 1. A pneumatic rubber tire having a flat tread surface is mounted on a plurality of wheels, a crawler belt made of a flexible material is hung between these tires, and the tire is provided on an inner peripheral surface of the crawler belt. A concave-convex pattern that comes into contact with the tread surface of the crawler belt is formed in the concave-convex pattern, and the concave groove escapes from the center of the crawler belt to the side and is inclined with respect to the longitudinal direction of the crawler belt. A tire-driven crawler belt, wherein a large number of garters serving as side guides for the tire are arranged on both sides and between the muddy water drainage escape grooves.