JPH0431196Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to an endless track device and can be used as a traveling device for combines, harvesters, agricultural transport vehicles, etc.

Conventional technology The endless crawler track of an endless track device is equipped with a tension roller at the rear end that can be moved back and forth, and a screw rod for moving and tensioning the wheel is welded and fixed to the vertical frame over a considerable length in the front and rear directions. The structure is such that it is supported against the catch.

Problems that the invention aims to solve: Since the screw rods that are subjected to the pressure of the tension rollers are subjected to a large amount of pressure while running, they cannot be used against the vertical frame of the track system due to their high rigidity. It must be done. However, in a small-sized endless track device, the distance between the front and rear wheels is close, and the weight must be reduced, so it is difficult to maintain the strength only by the tension of the wheels.

Means for Solving the Problems This invention consists of a vertical frame 2 on which an endless crawler track 1 is stretched in the front-rear direction, and a tension roller 3 that is movable back and forth that tensions the rear end of the endless crawler track 1; This tension roller 3
a bracket 5 for receiving a screw rod 4 for moving and adjusting the
Between the front and rear wheels 6 and 3, a front bracket 21 is installed between the bracket 5 and the vertical frame 2 in front of it.
The structure of the endless track device includes a guide body 7 which is connected to the guide body 7 and slidably contacts the back surface of the ground contact portion of the endless crawler belt 1.

Functions and effects of the invention When the endless track device runs, as the endless track 1 rotates, it is guided under tension by the tension roller 3 at the rear end and the guide body 7 that slides on the back surface of the ground contact part. , this endless track 1 is rotated. At this time, the bracket 5 fixed to the vertical frame 2 connects the front guide body 7 to provide rigidity between the bracket 5 and the vertical frame 2, and this bracket 5 receives pressure from the rear tension roller 3. Therefore, the guide body 7 and the screw rod 4 are in a state where they mutually receive the tension force of the endless crawler track 1, and in order to increase the strength of the bracket 5, a configuration is adopted in which the bracket 5 is constructed of specially long members in the front and rear. The guide body 7 and the screw rod 4 can be easily installed by effectively utilizing a narrow space in the front and rear.
Adjustment of the screw rod 4 can also be easily performed.

Embodiment In the illustrated example, the endless crawler track 1 is mainly made of a rubber material with internal wires etc. buried therein, and the drive teeth 10 that mesh with the drive pin 9 of the sprocket 8 along the inner peripheral surface of the rotation are arranged on the right and left sides as appropriate. The guide body 7 is positioned in this gap 11 so as to be in sliding contact (FIGS. 1 and 2), and the tension roller 3 at the rear end is positioned, and the drive tooth A front wheel 6 can be positioned outside of the wheel 10 for rolling guidance. Further, the guide body 7 may also be located outside the drive tooth 10 (FIG. 3).

The vertical frame 2 is made of square pipe material, and a pair of left and right sides constitute the vehicle body, with a prime mover, a handle frame 12, etc. installed on the upper side, and a control handle 1 at the upper rear end.
3, an operating mechanism 14, etc., and a threshing device mounted on the front part of the vehicle body to constitute a harvester. A sprocket shaft 15 driven by transmission from a prime mover is positioned and supported in the front part of the vertical frame 2,
The front roller 6 is rotatably provided below the front of the sprocket shaft 15 around the shaft 16, and the tension roller 3 at the rear end is rotatably provided on the shaft 18 of the bearing body 17. A bearing body 17 is fitted and guided to the vertical frame 2 so as to be slidable back and forth.

The bracket 5 is made of a plate-shaped body having an appropriate thickness, and is made to protrude outward at the front and rear intermediate portions of the vertical frame 2, and is fitted with a nut 19.
The screw rod 4 is screwed into the nut 19, the rear end of the screw rod 4 is rotatably fitted into the bearing body 17, and the front end has a square shaft portion 2 into which a wrench can be fitted.
0 is formed. Such a screw rod 4 is located directly below the vertical frame 2. The guide body 7 is in the form of a round pipe, and its front end is fixed to the vertical frame 2 through a bracket 21 with bolts 22, etc., and its rear end is fixed to the outer end of the bracket 5 with bolts 23, etc. 24
A bag carrier is attached to the rear end of the vertical frame 2 and is movable up and down about a shaft 25, which receives the threshed grains.

The sprocket 8 is rotated by the drive of the sprocket shaft 15, and meshes with the driving teeth 10 that mesh with the pin 9, thereby rotating the endless crawler belt 1. , and the Nativity's tension roller 3, etc., to rotate and travel. When the endless crawler belt 1 is stretched and loosened, the screw rod 4 is rotated to move the bearing body 17 to the rear side and the endless crawler belt 1 is tensioned. The tensile force of the screw rod 4 is partially received rigidly by the guide body 7 fixed to the vertical frame 2 by brackets 21 and 5.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a side view, FIG. 2 is a partial sectional view, and FIG. 3 is a sectional view of the same showing another embodiment. In the figure, 1 is an endless track, 2 is a vertical frame, 3 is a tension roller, 4 is a screw rod, 5 is a bracket, 6 is a roller, and 7
indicates a guide.

Claims (1)

[Scope of utility model registration request] Vertical frame 2 that stretches the endless track 1 in the front and rear direction
A tension roller 3 that tensions the rear end of the endless crawler track 1 is movable back and forth, a bracket 5 that receives a screw rod 4 that adjusts the movement of the tension roller 3, and a bracket 5 between the front and rear wheels 6 and 3. An endless track device comprising a guide body 7 which is connected by a front bracket 21 between the bracket 5 and the vertical frame 2 in front of the bracket 5 and comes into sliding contact with the back surface of the ground contact portion of the endless crawler belt 1.