JP2007137096A - Crawler traveling device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crawler traveling device capable of preventing accumulation of sludge on an adjuster frame side, and preventing detachment from an idler wheeler by allowing a crawler to follow indentations, projections, and inclinations in an agricultural field. <P>SOLUTION: A crawler 12 is wound around a drive wheel 7 and an idler wheel 8 journaled on a track frame 13 side, in which an adjuster frame 19 journaling the idler wheel 8 is inserted slidably forward and backward, and the adjuster frame 19 and the track frame 13 constitute the adjuster for adjusting a forward and backward position of the idler wheel 8. Furthermore, a portion 24 to be inserted in the track frame 13 of the adjuster frame 19 is formed into a column-shape, and the track frame 3 is formed into a cylindrical shape having an inside diameter allowing insertion and rotation of the inserted portion 24. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a crawler traveling device.

A crawler is wound around a drive wheel and an idler wheel that are pivotally supported on the track frame side. A crawler traveling device in which an adjuster that performs the above is configured is known (see, for example, Patent Documents 1 and 2).
JP 2002-337762 A Japanese Utility Model Publication No. 04-18080

In Patent Document 1, the top surface of the traveling frame corresponding to the track frame is an inclined surface and the earth and sand that has fallen on the traveling frame is discharged. However, in the case of mud, the mud may not be sufficiently discharged, Even if it is adopted in the adjuster frame, there is a drawback that the prevention of accumulation of mud on the adjuster frame side may not be sufficient.
In both Patent Documents 1 and 2, there is a problem that the idler foil does not tilt, and only the crawler may be twisted so as to follow the unevenness and inclination of the field scene to be detached from the idler foil.

  The crawler traveling device of the present invention for solving the above-described problems is an adjuster in which a crawler 12 is wound around a drive wheel 7 and an idler wheel 8 that are pivotally supported on the track frame 13 side, and the idler wheel 8 is pivotally supported. In the crawler traveling device in which the frame 19 is inserted into the track frame 13 so as to be freely slidable in the front-rear direction and the adjuster for adjusting the front-rear position of the idler wheel 8 is configured. The track frame 13 has a cylindrical shape with an inner diameter that allows the insertion portion 24 to be inserted and rotated.

  According to the structure of the present invention configured as described above, since the insertion portion and the track frame in the adjuster frame are cylindrical or cylindrical, the mud to be deposited on the insertion portion of the track frame or the adjuster frame is the track. There is an effect that mud is prevented from accumulating on the track frame and the adjuster frame side by sliding on the peripheral surface of the frame and the adjuster frame. Thereby, maintenance such as cleaning can be easily performed.

  The idler wheel rotates integrally with the adjuster frame by rotating the adjuster frame relative to the track frame. The crawler twists to follow the unevenness and inclination of the field scene in the grounding state, and at this time, the idler wheel rotates as described above, while maintaining the position of the idler wheel relative to the crawler, Allow tracking. This improves the followability of the crawler to the unevenness and inclination of the farm scene and improves the running performance, and prevents the inconvenience that only the crawler is twisted to follow the unevenness and inclination of the farm scene and comes off the idler wheel. There is an effect that.

  1 to 3 are a side view, a plan view, and a front view of a crawler tractor provided with a crawler traveling device of the present invention. Crawler traveling devices 2L and 2R are provided on the left and right sides of the traveling machine body 1 of the tractor. An engine (not shown) is housed in a bonnet 3 at the front of the traveling machine body 1. A cabin 4 is provided behind the bonnet 3. A driver's seat having a seat 6 is formed in the cabin 4.

  The left and right traveling apparatuses 2L and 2R are provided below the drive wheel 7 disposed on the front side, the idler wheel 8 disposed on the rear side of the drive wheel 7, and between the drive wheel 7 and the idler wheel 8. The crawler 12 is wound around a lower roller 9 and an upper roller 11 provided above between the drive wheel 7 and the idler wheel 8.

  The crawler 12 is rotationally driven by the rotational drive of the drive wheel 7. The traveling machine body 1 is moved straight by rotating the left and right crawler traveling devices 2L and 2R (crawler 8) at a constant speed. By providing a difference between the driving speeds of the left and right traveling apparatuses 2L and 2R, the traveling machine body 1 is turned to the side where the driving speed is low.

  FIG. 4 is a side view of the crawler travel devices 2L and 2R. The crawler traveling devices 2L and 2R include a track frame 13. As shown in FIG. 5, the track frame 13 is integrally attached to the left and right of the body frame 14. In FIG. 5, the right track frame 13 is not shown.

  A motor housing 16 that supports the drive wheel 7 is provided integrally with the body frame 14 in front of the track frame 13. A hydraulic motor is attached to the motor housing 16, and a drive wheel 7 that is rotationally driven by the hydraulic motor is supported.

  The track frame 13 has a hollow cylindrical pipe shape. Hollow square blocks 21F and 21R are integrally provided before and after the track frame 13. The track frame 13 is attached and supported on the side of the body frame 14 by the support arm 22 on the side of the body frame 14 via the blocks 21F and 21R.

  At the top and bottom of the track frame 13, mounting seats 23 for mounting the upper roller 11 and the lower roller 9 are provided. The upper and lower wheels 9 and 11 are attached to the track frame 13 by mounting seats 23.

  The idler wheel 8 is supported on the adjuster frame 19 so as to be freely rotatable. A front portion of the adjuster frame 19 is a cylindrical pipe-shaped insertion portion 24 of a size that can be inserted smoothly and slidably back and forth without being tracked by the track frame 13. A bracket 26 is provided behind the insertion portion 24. The idler wheel 8 is pivotally supported by the bracket 26 so as to be freely rotatable.

  As shown in FIG. 6, the adjuster frame 19 has the insertion portion 24 inserted into the track frame 13 from the outside (rear) of the rear block 21 </ b> R. An adjustment cylinder 27 is provided at a front position in the track frame 13. A tension spring 29 made of a compression spring is provided between the piston rod 28 of the adjustment cylinder 27 and the tip of the insertion portion 24.

  Grease can be injected into the adjuster cylinder 27 via the greasing valve 31. By injecting grease from the greasing valve 31, the piston rod 28 is pushed out and the adjuster frame 19 is pushed out of the track frame 13 via the tension spring 29. It can be carried out.

  As described above, the adjuster for adjusting the front and rear position of the idler wheel 8 is configured, and the tension of the crawler 12 can be adjusted by injecting grease. A large number of core bars 32 having protrusions 32a in two rows on the left and right sides are embedded in the crawler 12 at regular intervals. The idler foil 8 is positioned between the protrusions 32a substantially perpendicular to the ground plane of the crawler 12 and applies tension to the crawler 12.

  The idler wheel 8 rotates freely with respect to the adjuster frame 19 while rotating integrally with the adjuster frame 19 by the rotation of the insertion portion 24 with respect to the track frame 13. However, in a normal state, the adjuster frame 19 does not freely rotate with respect to the track frame 13 due to the tension (tension) of the crawler 12.

  In the crawler traveling devices 2L and 2R, the crawler 12 is grounded and rotated by the drive wheel 7 by the above structure, so that the traveling machine body 1 travels as described above. When driving the crawler travel devices 2L and 2R during work in the field, the crawler 12 is twisted to follow the unevenness and inclination of the field scene.

  At this time, the adjuster frame 19 is rotated with respect to the track frame 13, and the idler wheel 8 is rotated integrally with the adjuster frame 19 so that the posture of the crawler 12 with respect to the ground plane is substantially vertical. The By the rotation of the idler wheel 8, the crawler 12 is allowed to follow the field scene.

  Thereby, the followability to the unevenness | corrugation and inclination of the field scene of the crawler 12 improves, and driving performance improves. Further, the inconvenience that only the crawler 12 is twisted so as to follow the unevenness and inclination of the farm scene and is removed from the idler wheel 8 is prevented.

  Further, the mud to be deposited particularly on the insertion portion 24 of the track frame 13 or the adjuster frame 19 slides on the circumferential surface of the cylindrical track frame 13 or the cylindrical pipe-shaped insertion portion 24, and the track frame 13 or the adjuster frame 19. The accumulation of mud on the side is prevented. Accordingly, maintenance such as cleaning can be easily performed, and the adjuster frame 19 can be smoothly slid.

It is a side view of the crawler type tractor provided with the crawler traveling device of the present invention. It is a top view of the said crawler type tractor. It is a front view of the said crawler type tractor. It is a side view of a crawler traveling device. It is a perspective view which shows a body frame and a track frame. It is principal part sectional drawing of a pipe frame part.

Explanation of symbols

1 3 track frame 7 drive wheel 8 idler foil 12 crawler 13 track frame 19 adjuster frame 24 insertion part (insertion part)

Claims (1)

A crawler (12) is wound around a drive wheel (7) and an idler wheel (8) pivotally supported on the track frame (13) side, and an adjuster frame (19) pivotally supporting the idler wheel (8) is provided. In a crawler traveling device in which an adjuster for adjusting the front / rear position of the idler wheel (8) is inserted into the track frame (13) so as to be freely slidable in the front / rear direction. A crawler traveling device having a cylindrical shape and a track frame (13) having a cylindrical shape having an inner diameter allowing insertion and rotation of the insertion portion (24).

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