JP2001122166A - Crawler traveling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crawler traveling device capable of always maintaining stable traveling performance without causing a change of a slant angle in a traveling device front part even if adjusting tension of a crawler belt, and allowing certain prevention of detachment of the crawler belt when adjusting the tension. SOLUTION: In this crawler traveling device, a foremost ground rolling wheel 2 among ground rolling wheels 2, 3, 4, a tension rolling wheel 5 and a guide rod 10 are installed to an adjustment rod 8 movable back and forth and fixable relatively to a truck frame 1 extending in the back-and-forth direction such that the ground rolling wheel 2, the tension rolling wheel 5 and the guide rod 10 move back and forth correspondingly to the back-and-forth movement of the adjustment rod 8. Thereby, the tension adjustment of the crawler belt 7 doesn't change position relation among the respective rolling wheels 2, 5, the guide rod 10 and the crawler belt 7 in the crawler traveling device front part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler traveling apparatus for traveling on uneven terrain, which maintains stable running performance and reliably prevents the crawler belt from coming off.

[0002]

2. Description of the Related Art Conventionally, a crawler belt is wound around a plurality of ground wheels supported by a track frame extending in the front-rear direction, a driving sprocket behind the ground wheels, and a tension wheel above a front. It is generally known that a crawler traveling device that adjusts the tension of a crawler belt only by moving the tension roller forward and backward by installing the tension roller at the front end of an adjusting rod that can be moved forward and backward with respect to the track frame. Have been.

[0003]

In the conventional crawler traveling apparatus, when the tension of the crawler belt 7 is adjusted, only the tension wheel 5 moves in accordance with the movement of the adjusting rod 8 as shown in FIG. Therefore, the inclination angle θ of the front portion of the crawler belt 7 formed by the foremost contact wheel 2 and the tension roller 5 fluctuates every time the tension is adjusted, so that stable running performance can be obtained. could not. 5B, the interval between the guide rod 10 and the inclined surface at the front of the crawler belt 7 becomes too wide, as shown in FIG. 5B, and a sufficient guide effect by the guide rod 10 is obtained. And the crawler belt 7 is easily detached. An object of the present invention is to provide a crawler traveling device that solves the above-mentioned problem with a simple configuration and maintains stable traveling performance at all times.

[0004]

A plurality of ground wheels 2, 3, 4 arranged below a track frame 1 extending in the front-rear direction.
A crawler traveling device in which a crawler belt 7 is wound around a driving wheel 5 disposed on the front and upper side of the crawler belt and a driving sprocket 6 disposed on the rear side to form a ship bottom type in a side view. Frame 1
Is disposed at the front end of the adjusting rod 8 which can be moved and fixed forward and backward, and at least the foremost contact wheel 2 of the contact rollers 2, 3, 4 extends downward from the adjusting rod 8. At the lower end of the bracket 9, a guide rod 10 for preventing the crawler from coming off from below the bracket 9 is connected to the ground wheel 2.
And the tension roller 5 extends along the inclined surface of the front part of the crawler belt 7, the front end of the guide rod 10 is bent rearward, and the front end is attached to the bracket 9 or the adjustment rod 8. The structure of the crawler traveling device attached was adopted.

[0005]

In the crawler traveling apparatus of the present invention, when the tension of the crawler belt 7 is adjusted, the tension roller 5 and the foremost contact wheel 2 move together with the adjustment rod 8 moving back and forth. Therefore, the inclination adjustment of the front portion of the crawler belt 7 does not change due to the tension adjustment,
Constant and stable running performance can always be obtained. or,
When the tension of the crawler belt 7 is adjusted, the guide rod 10 for preventing the crawler belt 7 from coming off moves back and forth together with the tension roller 5 and the ground roller 2.
Is always adjacent to the inclined surface of the front part of the crawler belt 7 so that a sufficient guiding effect can be obtained.

[0006]

Next, an embodiment of the present invention will be described with reference to the drawings. The crawler traveling device according to the present invention includes a crawler belt 7 on a driving sprocket 6 at an upper rear side, a tension wheel 5 that is adjustable in the front-rear direction at an upper front side, and a plurality of grounding wheels 2, 3, and 4 located on the ground side. It is wrapped around to form a ship bottom type, and the upper front tension roller 5 is projected forward from the ground contact portion to form an inclined surface on the front of the traveling device, thereby improving running performance and improving the running performance. And so on. 1 is a track frame extending in the front-rear direction,
A plurality of wheels 3 and 4 are supported below, and a guide tube 12 formed by a square pipe is mounted on the upper surface, and an adjustment rod 8 is fitted into the guide tube 12 so that the adjustment rod 8 The frame 1 is configured to be slidable in the front-rear direction. A tension arm 13 for supporting the tension wheel 5 is attached to the front end of the adjusting rod 8, and grounding wheels 2, 3 are attached to the lower end of a bracket 9 extending downward from the front part of the adjusting rod 8. 4 is provided with the foremost contact wheel 2. The ground rolling wheels 3 and 4 supported by the track frame 1 are configured such that the rolling wheels 3 and 3 located in the center are movable rolling wheels composed of swingable medium rolling wheels. 3
Are installed at the front and rear ends of a movable frame 15 rotatable about a support shaft 14.

Reference numeral 16 denotes an idler bolt for adjusting the front and rear positions of the adjusting rod 8. For example, in a crawler traveling device in which the adjusting rod 8 is fitted to a position as shown in FIG. When the belt 7 is loosened, the idler bolt 16 is operated to push the adjusting rod 8 forward as shown in FIG. 2, and the crawler belt 7 is moved by the tension roller 5 and the ground roller 2 at the front end of the adjusting rod 8.
The tension is adjusted.

The crawler belt 7 is provided with bifurcated branched crawler detachment prevention protrusions 17, 17 at predetermined intervals in the circumferential direction at the center of the inner peripheral surface thereof, as shown in FIG. The projections 17, 17 are sandwiched between the axle wheels or, as shown in FIG.
Are configured not to slip off. Reference numerals 10, 18, and 19 are guide rods for preventing the crawler from coming off, and extend along the crawler belt 7 between the protrusions 17 for preventing the crawler from coming off. The foremost guide rod 10 of the guide rods 10, 18, 19 extends from below the bracket 9 along the inclined surface of the front part of the crawler belt 7 formed by the grounding rolling wheel 2 and the tension rolling wheel 5. The front end is bent rearward, and the front end is attached to the bracket 9, and the upper surface of the guide rod 10 formed by the bending is inclined horizontally or rearward and downward. . A guide rod 18 attached between the movable wheels 3 is attached to a lower end of a guide frame 20 supported by the movable frame 15.
It swings with the swingable movable wheels 3 and 3 according to the unevenness of the traveling road surface. The guide rods 19 other than the two types of guide rods 10 and 18 are the foremost contact wheel 2 and the movable roller 3.
The guide is provided for all the ground wheels 4 and 4 except for. That is, in the crawler traveling device, the guide rods 10, 18, 1
It has nine.

When traveling on uneven terrain using the crawler traveling device having the above configuration, the crawler traveling device has the guide rods 10, 18, and 19 for all the ground wheels 2, 3, and 4. The crawler belt 7 is guided so as not to come off over the entire contact surface of the crawler traveling device. Further, since the guide rod 18 attached between the movable rolling wheels 3 and 3 swings along with the swingable movable rolling wheels 3 and 3 according to the unevenness of the traveling road surface, the crawler traveling device is a stone. Even when the crawler belt 7 is deformed when climbing over obstacles such as ridges and ridges, the guide rod 18 guides so that the crawler belt 7 does not come off due to swinging as appropriate. Furthermore, the frontmost guide rod 10 is
After extending along the inclined surface of the front part of the crawler belt 7 formed by the foremost contact wheel 2 and the tension roller 5, the front end thereof is bent rearward, and the guide rod formed by the bending is provided. Since the upper surface of the guide rod 10 is inclined horizontally or rearward and downward, the stone falling from above the guide rod 10 is conveyed rearward due to the inclination of the upper surface, and the stone is crawled by the crawler belt 7 and the ground wheel 2. There is no possibility that the crawler belt 7 will be damaged due to intrusion. If the crawler belt 7 becomes loose, the adjustment rod 8 fitted into the guide tube 12 is pushed forward by tightening the idler bolt 10 above the track frame 1 and attached to the front of the adjustment rod 8. The tension wheel 5, the ground wheel 2 and the guide rod 10 are moved forward as they are to adjust the tension of the crawler belt 7. Therefore, since the inclination angle θ of the front portion of the crawler belt 7 formed by the tension wheel 5 and the ground wheel 2 does not change due to the tension adjustment,
The crawler traveling device can always maintain a constant traveling performance, and a guide rod 10 extending along the inclined surface.
Is not separated from the crawler belt 7, so that a sufficient guiding effect can be obtained.

Another embodiment shown in FIGS. 6 to 9 will be described. FIGS. 6 and 7 show a high-floor harvesting vehicle having a pair of left and right crawler traveling devices mounted on a lower portion thereof. The high-floor harvesting vehicle has three lower support legs 21 and 21 erected upward from the truck frame 1. And three upper legs 23, 2 provided downward from the lower leg 21 and the upper body 22.
3 is connected by bolts 24, and by changing the connection position of the lower support 21 and the upper support 23 by the bolt 24,
The height of the upper body 22, that is, the vehicle height can be changed. The lower legs 21 extend obliquely upward and outward from the track frames 1 of the left and right crawler traveling devices, and extend vertically upward at positions outside the crawler traveling devices. Accordingly, a large space is formed between the left and right crawler traveling devices and the lower portion of the upper vehicle body 22 by hanging down from the outside of the crawler traveling device. Further, since the lower leg 21 is inclined obliquely upward and outward, the protruding position of the lower leg 21 to the outside of the crawler traveling device can be configured to be relatively high, and the lower leg 21 can be brought into contact with an adjacent ridge or crop. Can be reduced.

The upper body 22 has a carrier 25 having a flat floor surface on the front side, a front frame 26 standing on the front end, and side frames 27 standing on the left and right side ends. The loading platform 25 and the front frame 26 have a telescopic structure so that the left and right widths can be changed. Reference numeral 28 denotes a handlebar for changing the width of the left and right widths. By rotating, one side of the divided left and right loading platforms is moved via the screw shaft, so that the left and right widths of the loading platform 25 can be changed. The width between the left and right of the crawler traveling device can be changed according to the ridge width or the like. A prime mover frame 30 on which a prime mover 29 is mounted is provided on the rear side of the upper body 22, a handlebar 31 is protruded rearward, and a control lever 32 is provided above the handlebar 31. 33
Reference numeral 34 denotes an anti-clamping rod which is moved forward by contact with an operator during reverse movement to disconnect the traveling clutch. Reference numeral 34 denotes an auxiliary operating device at the front of the vehicle body. The driving sprocket 6 includes a motor 29
The drive sprocket 6 and the tension roller 5 and the rollers 2, 3, and 4 located on the ground contact side are crawler belt 7
To form a crawler traveling device.

An adjusting rod 8 for adjusting the tension of the crawler belt 7 is integrally connected with a tension roller 5 via a tension arm 13 and a roller 2 via a bracket 9. When the tension is adjusted in accordance with the elongation of the crawler belt 7 or when the tension of the crawler belt 7 is adjusted in accordance with the height adjustment of the upper body 22, the idler bolts 16 are operated to integrate them. Move it back and forth. At the time of this adjustment, the distance between the wheel 2 and the fixed wheel 4 immediately behind the wheel 2 is changed to be wide or narrow. Therefore, a mounting bracket 35 is welded to the side of the front rising portion of the guide rod 19 at the position of the wheel 4, and auxiliary guide plates 36, 36 having front and rear lengths corresponding to the above-mentioned intervals are attached to and detached from the bracket 35 by bolts 37, 37. It is configured to be convertible. The auxiliary guide plate 36 has the same width as the guide rod 19 and extends forward from the guide rod 19 continuously. The auxiliary guide plate 36
May correspond to the amount of tension of the crawler belt 7 due to a change in the height position of the drive sprocket 6 when the upper body 22 is adjusted vertically. Also, the auxiliary guide plate 36
The length of the protrusion from the mounting bracket 35 may be changed and adjusted by using the mounting portion as an elongated hole. It should be noted that, in the claims, numbers are provided for the purpose of convenience with the drawings, but the present invention is not limited to the structure of the accompanying drawings by this entry.

[Brief description of the drawings]

FIG. 1 is an overall side view of an embodiment of the present invention.

FIG. 2 is an overall side view of the embodiment of the present invention.

FIG. 3 is a bottom view of the ground wheels 2, 3, 4 and guide rods 10, 18, 19 in the embodiment of the present invention.

FIG. 4A is a sectional view taken along the line AA in the embodiment of the present invention. (B) BB sectional drawing in the Example of this invention.

FIG. 5A is an overall side view of a conventional example. (B) An overall side view of a conventional example.

FIG. 6 is a side view showing another embodiment.

FIG. 7 is a front view showing another embodiment.

FIG. 8 is a side view of a main part showing another embodiment.

FIG. 9 is a side view after adjustment of a main part showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Track frame 2 Grounding wheel 3 Grounding wheel 4 Grounding wheel 5 Tension wheel 6 Drive sprocket 7 Crawler belt 8 Adjustment rod 9 Bracket 10 Guide rod

Claims (1)

[Claims] A track frame (1) extending in the front-rear direction.
A plurality of ground wheels (2), (3), (4) arranged below
And a tension wheel (5) installed above and in front of it,
In a crawler traveling device in which a crawler belt (7) is wound around a driving sprocket (6) disposed rearward to form a ship bottom type in a side view, the tension wheel (5) is moved back and forth with respect to the track frame (1). The adjusting rod (8), which can be moved and fixed to the front, is disposed at the front end, and the grounding wheels (2), (3),
At least the foremost contact wheel (2) of (4) is extended downward from the adjusting rod (8) by a bracket (9).
At the lower end, a guide rod (10) for preventing the crawler from coming off from below the bracket (9) is attached to the front of the crawler belt (7) formed by the ground roller (2) and the tension roller (5). A crawler running by extending along the inclined surface of the section, bending the front end of the guide rod (10) backward, and attaching the front end to the bracket (9) or the adjustment rod (8). apparatus.