JPH044953Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is applicable to combines with endless strips such as crawlers, agricultural machinery such as harvesters, earthworks such as boxhoes and dozers, and equipment for crane trucks and transport vehicles. Regarding the tracked vehicle, in detail, it is equipped with auxiliary running wheels at the front or rear of the body, and can be operated in a running state using an endless strip body or in a running state with one end floating on the endless strip body and the auxiliary running wheels and the endless strip body partially touching the ground. This invention relates to a tracked vehicle that can run in two states.

[Conventional technology]

Tracked vehicles equipped with endless strips such as crawlers have a large ground contact area, making them suitable for working and driving on soft soil. There is a risk that the endless strip may come off due to lateral force, resulting in poor steering performance. To solve this problem, conventionally, running wheels with a radius larger than the bottom surface of the endless strip were removably attached to the left and right drive shafts and driven shafts arranged at the front and rear of the endless strip. (Jitsukai 56-
No. 166981), or separate from the endless strip, left and right front wheels and left and right rear wheels that can be raised and lowered at the front and rear of the fuselage are provided, and the engine output shaft is movably connected to the rear vehicle via a universal joint, etc. 48−53739
Publication No.) etc. are known.

[Problem that the invention attempts to solve]

Both of the conventional structures mentioned above have the advantage of being able to run on running wheels when driving at high speeds on the road, so they have good steering performance and can run well just like ordinary tire-driven cars, but the former −166981)
In order to switch from running on an endless strip to running on wheels, it is necessary to attach a large amount of jack to all the front, rear, left, and right wheels, which requires a great deal of effort and time and is extremely inefficient. , and the latter (Utility Model Application Publication No. 48-53739)
However, it is necessary to consider a separate drive system for the running wheels, resulting in a complicated structure, high cost, and low productivity.

The present invention has been developed in view of the above-mentioned circumstances, and allows for easy switching to a driving mode suitable for both field driving and road driving, and also allows the structure of the drive system to be easily constructed. The purpose is to provide tracked vehicles.

[Means for solving problems]

In order to achieve the above object, a tracked vehicle according to the present invention is provided with an auxiliary traveling wheel that can change direction on the front or rear part of a vehicle that runs on an endless belt-like body, and also includes a tracked vehicle that is equipped with an auxiliary running wheel that can change the direction of the vehicle. The auxiliary running wheel has a running position in which the ground contact surface of the endless strip body is located lower than the ground contact surface of the auxiliary running wheel, and an inclined position in which the end closer to the auxiliary running wheel is on the upper side. A characteristic configuration is that the configuration is changeable.

The functions and effects of this feature configuration are as follows.

[Effect]

In other words, when working in the field, the endless strip is normally used for driving by keeping the ground contact surface of the endless strip lower than the ground contact surface of the auxiliary wheels, whereas when traveling on the road, the endless strip is lower than the ground contact surface of the auxiliary wheels. By placing the end of the endless strip body closer to the auxiliary wheel above the ground contact surface of the auxiliary wheel, the auxiliary wheel and the end of the endless strip body far from the auxiliary wheel are grounded and the endless strip body is driven. It can be driven by

[Effect of idea]

Therefore, according to the present invention, there is provided a wheel that enables high-speed running on roads etc. by simply changing the relative vertical position of the auxiliary wheel and the end of the endless strip on the side closer to the auxiliary wheel. It is possible to easily switch between a running mode using an endless strip and a running mode using only the endless strip, which allows for good running in the field. Since there is a ground contact surface for a plurality of wheels below the ground, the number of wheels is smaller than in the case where the wheels are attached and detached, and the effort of going up and down is reduced. In addition, since driving the running system during high-speed running is possible by driving the endless strip as before, there is no need to provide a dedicated drive system to drive the auxiliary wheels, and the structure of the drive system can be changed from the conventional one. I was able to make it simpler than before.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

Figure 1 shows a side view of a combine harvester, which is an example of a tracked vehicle. A pre-processing device 4 is provided for conveying to the threshing device 3, and a threshing device 3 for threshing the shell culms conveyed from the pre-processing device 4 from the cockpit 5 disposed on the upper part of the fuselage 2 to the rear, and the threshed waste straw. and a waste straw cutter 6 for cutting the straw.

The pretreatment device 4 is pivotally connected to the fuselage 2 so that it can be operated freely up and down around the horizontal transverse axis P by operating a hydraulic cylinder 7 from the cockpit 5, and has rubber tire-type auxiliary units at the left and right lower portions. Running wheels 8, 8 are attached. The auxiliary running wheels 8, 8 are removably pivoted to a side plate 10 constituting a support frame 9 of the pretreatment device 4, and bolts 11
Alternatively, it is constituted by a caster wheel rotatable around a shaft fitted into a boss b at the free end of a swinging rod 12 which can be repositioned in two positions up and down with a pin.

The crawler 1 is wound around a driving sprocket 14 at the front of a truck frame 13, a driven sprocket 15 at the rear, and an idler wheel 16.
The machine body 2 equipped with the threshing device 3 is pivoted to the truck frame 13 so as to be able to move vertically around a drive shaft 17, and is operated by a hydraulic cylinder 18 installed between the machine body 2 and the truck frame 13. The rear part of fuselage 2 is lifted up.

Therefore, when cutting and harvesting work in the field, the auxiliary traveling wheels 8 are fixed with the swinging rods 12 in the upper position with the bolts 11, and when traveling on the road, the pretreatment device 4 is raised. , the swinging rod 12
is changed to the bolt hole 19 position and the auxiliary running wheel 8 is fixed in the lower position, and then the pre-processing device 4 is lowered to float the part of the crawler 1 near the wheel 8 and separate it from the wheel 8. The machine body 2 is supported by the crawler section and the hydraulic cylinder 18 is operated to maintain the machine body 2 horizontally as it travels.

[Another Embodiment] The auxiliary running wheels (caster wheels) are removably attached to a mounting frame protruding outward from the support frame 9 of the pretreatment device 4 using bolt nuts or the like.
It may be configured to be attached while driving on the road.

The machine base 10 of the machine body 2 and the truck frame 13 may be fixedly mounted, and the hydraulic cylinder 18 may be omitted.

In addition to combine harvesters, tracked vehicles include harvesters, batshoes, dozers, cranes,
Any vehicle may be used as long as it is equipped with an endless strip such as a crawler, such as a transport vehicle.

The auxiliary running wheel 8 may be attached to the rear part of the body 2, or may be provided only at one location in the front or rear part of the body 2 in the center in the left-right direction of the body.

As a means for levitating the auxiliary traveling wheel side of the endless strip 1, the wheels may be attached to the lower part of a hydraulic jack or manual jack fixed to the front or rear of the machine body, or the wheels may be built into the jack. This may be detachably attached to the fuselage.

Furthermore, the auxiliary running wheels 8 are provided so as to be adjustable up and down, or to be detachable at a height such that the tires slightly touch the road surface in the crawler running position, and the track frame 13 is mounted as shown in FIG. The machine base 20 is configured to be swingable around pivots 17, 21, or 22, and the front or rear part of the machine base 20 is fixed to the truck frame 13, and the other side is attached to the truck frame 1 via a hydraulic cylinder 23.
3 and operate the hydraulic cylinder 23 from the driver's seat 5 to levitate the front or rear part of the crawler 1. In this way, even if the auxiliary traveling wheel 8 is fixed to the fuselage 2 at all times, just by operating the hydraulic cylinder 23, the crawler portion 24 near the wheel 8 can be lifted up, and the crawler portion 24 can be separated from the wheel 8. Separated crawler part 25
The attitude of the aircraft body 2 can also be maintained in a substantially horizontal state while being able to create a running state in which the aircraft is traveling in a horizontal direction.

The auxiliary traveling wheels 8 may be attached to an axle protruding from the pre-processing device 4, and the pre-processing device 4 may be configured to be able to swing left and right so that it can be steered from the driver's seat 5.

The hydraulic cylinder 7 or 23 or the hydraulic jack described above is collectively referred to as a driving state switching device.

[Brief explanation of drawings]

The drawings show an embodiment of a tracked vehicle according to the present invention,
FIG. 1 is a schematic side view of a combine harvester, and FIG. 2 is a side view of main parts showing another embodiment. 1... Endless belt-shaped body for traveling, 2... Airframe, 8...
Auxiliary running wheels.

Claims (1)

[Scope of utility model registration request] Auxiliary running wheels 8 whose direction can be changed to the front or rear of the aircraft 2 that runs on the endless running belts 1, 1;
8 is attached, and the endless strips 1, 1 and the auxiliary running wheels 8, 8 are arranged such that the ground contact surface of the endless strips 1, 1 is located lower than the ground contact surface of the auxiliary running wheels 8, 8. The tracked vehicle is configured to be able to freely change its posture between a running posture and a tilted posture in which the end portion on the side closer to the auxiliary running wheels 8, 8 is on the upper side.