JPH04334676A - crawler device - Google Patents

Abstract

PURPOSE:To change the grounding area of an endless belt appropriately by disposing plural rotating wheels, rotatably mounted to a vertically movable travelling frame, at the intermediate parts of the endless belt, and moving the travelling frame vertically according to the travel state so as to press/release the endless belt through the respective rotating wheels. CONSTITUTION:In a crawler device 10, an endless belt 7 is rotatably stretched between a driving sprocket 4 rotatably fitted to the axle of a transmission case provided at an under carriage, and a tension wheel 6 fitted to a travelling machine frame 5. At the intermediate parts of the endless belt 7, plural rotating wheels 8-8'' are rotatably mounted to a travelling frame 9 so as to form the endless belt 7 to be guided from inside. The travelling frame 9 is formed to be movable downward by a hydraulic device 16 and an operating rod 17. The endless belt 7 is thereby pressed or released from pressing through the respective rotating wheels 8-8'' in association with the vertical movement of the travelling frame 9 so as to change the grounding area of the endless belt 7 appropriately according to the travel state.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] The present invention can be applied to construction machines and agricultural machines that run on crawler devices.

0002

[Prior Art and Problems to be Solved by the Invention] Conventional crawler devices of this type are used as running devices for heavy construction machinery and agricultural machinery, and because of their large ground contact area, they are propelled while supporting the weight of the machine. I can do it. However, the crawler
The problem with this device was that the ground contact area was large, which caused defects when the aircraft was turning, making it impossible to make smooth turns.

0003

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention takes the following technical means. That is, an endless belt 7 is provided by being wound around a drive sprocket 4 that is pivoted to an axle 3 of a mission case 2 provided on a chassis 1 and a tension wheel 6 that is attached to a traveling machine frame 5. A plurality of rolling wheels 8, 8', 8'' are mounted on a running frame 9 in the middle part thereof, so that the endless belt 7 can be guided from the inside, and the running frame 9 is connected to the driving sprocket 4 and tension ring 6
This is a crawler device configured to be able to move downward relative to the ground.

0004

[Embodiment] First, the configuration will be explained. The crawler device 10 uses a hard rubber material to embed core metals 11 at regular intervals to form an endless band 7, and an engagement hole 12 in which a drive sprocket 4, which will be described later, engages, is formed between the core metals 11 and the core metals 11. Core metal 11
It is placed all around the area between.

[0005] The endless band 7 is provided with a protruding protrusion 13 on the ground side that is continuous in the longitudinal direction and is slightly higher than the propulsion lug 14 disposed laterally. As shown in FIGS. 3 and 4, this raised protrusion 13 is located below the rotational position of each wheel, which will be described later, and is provided with a cutting portion 15 as shown in FIGS. 5 and 7. There is.

The endless band 7 can drive a drive sprocket 4 whose front side is pivoted to an axle 3 provided in the transmission case 2 of the chassis 1 by engaging with an engagement hole 12 as shown in FIG. The rear side is wound around a tension ring 6 which is mounted on the traveling machine frame 5. The wheels 8, 8', 8'' are equipped with a hydraulic system 16,
It is configured to be mounted on a running frame 9 connected to an operating rod 17 so that the endless band 7 can be guided from the inside.

Note that the configuration shown in FIGS.
The tension ring 6 (corresponding to the tension ring 6 in FIG. 1) is shaped like an outer wheel so that mud can be removed from the central engagement hole 12 by the circularly rotating portion of the endless band 7. In the configuration shown in FIG. 10, the wheels located at the corners of the endless band 7 are shaped like an abacus bead so that soil can be removed to the outside.

The threshing machine 18 is mounted on the chassis 1 and is configured to thresh supplied grain culms. The reaping pretreatment device 19 is configured to include, from the front, a weed cutting body 20, a reaping device 21, and a grain culm conveying device 22, and supply the reaped grain culm to the threshing machine 18. Next, its effect will be explained. The prime mover is started and the chassis 1 is advanced while driving each rotating part of the machine body to start reaping and threshing work.

At this time, the endless band 7 has a drive sprocket 4 attached to the axle 3 of the mission case 2 that is connected to the engagement hole 1.
2 and drives the vehicle chassis 1 as a crawler device 10.
is being promoted. The crawler device 10 moves forward while supporting the entire weight of the vehicle platform 1 on a wide ground surface.

In particular, as shown in FIGS. 3, 4 and 5, the wheel 8
, 8', 8'', the structure has a raised protrusion 13 below it, so it has the feature of being able to reliably absorb the vibrations that occur when driving on the road.Furthermore, the structure shown in FIGS. In other words, the configurations in FIGS. 8 and 9 are suitable for
Since the last rolling wheel is an outer rolling wheel for the mud carried around in the endless belt 7, mud can be easily discharged through the engagement hole.

Next, when the vehicle platform 1 reaches a corner of the field and turns, the hydraulic system 16 is first activated and the operating rod 17 is turned.
The traveling frame 9 is moved downward via the . Then,
The endless belt 7 has wheels 8 mounted on the running frame 9,
As 8' and 8'' move downward, the ground contact area becomes narrower as shown by the imaginary lines shown in FIGS. 1 and 2. Then,
When performing a turning operation, the endless band 7 can be turned extremely easily due to its narrow ground contact area.

0012

[Effects of the Invention] As described above, when the present invention supports and moves a heavy vehicle weight, it is possible to move while supporting the heavy vehicle weight reliably with a wide ground contact area, and when the chassis turns, the rolling wheel portion moves downward to make contact with the ground. It has the characteristic of being able to turn easily by narrowing the area.

[Brief explanation of drawings]

FIG. 1 is a side view showing the operation of essential parts of the present invention.

FIG. 2 is a front view showing the operation of essential parts of the present invention.

FIG. 3 is a front sectional view showing one embodiment of the present invention.

FIG. 4 is a front sectional view showing a modification of FIG. 3;

FIG. 5 is a perspective view of the crawler according to FIG. 3;

FIG. 6 is a cross-sectional view of a portion of the invention.

FIG. 7 is a side sectional view of one embodiment of the present invention.

FIG. 8 is a partial side view of another embodiment of the invention.

FIG. 9 is a rear view showing another embodiment of the present invention.

FIG. 10 is a plan view showing essential parts of another embodiment of the present invention.

FIG. 11 is a side view of one embodiment of the present invention.

[Explanation of symbols]

1 Chassis 2
Mission case 3 Axle 4 Drive sprocket 5 Traveling machine frame
6 Tensioning ring 7 Endless band 8, 8',
8” Rolling wheel 9 Traveling frame 10 Crawler device 11 Core metal
12 Engagement hole 13 Raised protrusion 14 Propulsion lug 15 Cutting section 16 Hydraulic device 17 Operating rod 18 Thresher 19 Reaping pre-treatment device 20 Grass splitter
21 Reaping device 22 Grain culm conveying device

Claims (1)

[Claims] Claim 1: An endless band is provided by winding around a drive sprocket that is pivoted to an axle of a mission case provided on a vehicle chassis, and a tension wheel that is attached to a traveling machine frame. The crawler has a structure in which a plurality of wheels are mounted on a running frame so that the endless belt can be guided from the inside, and the running frame can be moved downward with respect to the driving sprocket and the tensioning wheel. color device