JP2002037151A - Crawler traveling type work vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To expand a lifting adjusting range by a rear pitching cylinder while avoiding strength reduction in a truck frame in a crawler traveling type work vehicle connecting the truck frame and a machine body frame via a pair of front and rear rocking links and having a front pitching cylinder for rocking, lifting and adjusting the front end side of the machine body frame by rockingly operating a front rocking link and the rear pitching cylinder for rocking, lifting and adjusting the rear end side of the machine body frame by rockingly operating a rear rocking link. SOLUTION: An interlocking adapter 24a is arranged between a cylinder side interlocking member 24 and a link side interlocking member 22 for interlocking the front rocking link 11 with the front pitching cylinder 31. The rear pitching cylinder 32 lifts and adjusts the rear end side of the machine body frame 6, and when the front. end side of the truck frame 13 abuts to a boss part 11a of the front rocking link 11, the truck frame 13 and the front rocking link 11 integrally rotate around the axis F1 to the machine body frame 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a track frame for supporting the grounding side of a crawler belt via a plurality of grounding rollers arranged in the longitudinal direction of the machine body, and connecting the track frame to a machine body frame of a traveling machine body. A pair of front and rear swing links and one front swing link of the pair of swing links are vertically operated with respect to the body frame, so that the front end side of the body frame is vertically moved with respect to the track frame. By swinging the front pitching cylinder for swing adjustment and the other rear swing link of the pair of swing links up and down with respect to the body frame, the rear end side of the body frame is moved up and down with respect to the track frame. And a rear pitching cylinder for swing adjustment.

[0002]

2. Description of the Related Art In a work vehicle described above, a front pitching cylinder adjusts a front end of a body frame with respect to a track frame, and a rear pitching cylinder adjusts a rear end of a body frame, even if a traveling place is inclined forward and backward. By adjusting the height of the body frame relative to the track frame, it is possible to work while keeping the body frame horizontal or in a posture close to it in the front-rear direction. In addition, since the attitude can be controlled by adjusting the swing of the body frame at the rear fulcrum and the swing adjustment at the front fulcrum, the swing adjustment at the front fulcrum and the swing at the rear fulcrum are possible. As compared with the case where the posture is controlled by only one of the adjustments, the posture can be controlled advantageously, for example, the adjustable range becomes larger for the expansion / contraction stroke of the pitching cylinder.

[0003]

In this type of work vehicle, for example, the swing link is formed so as not to bend in the lateral direction of the machine body and is connected to the upper surface of the track frame. They are arranged so as to be close to each other in the lateral direction of the fuselage, and are advantageously configured in terms of strength and the like. As a result, of the front swing link and the rear swing link, the swing link located on the same side as the body front-rear direction extending from the connection point with the body frame is the body link. As the track frame and the non-adjustable swing link rotate relative to the frame frame and the non-adjustable swing link relative to the frame, the track frame is moved to the base end of the unadjustable swing link. The contact has reached the limit of adjustment, and the adjustable range has been narrowed relative to the expansion / contraction stroke of the pitching cylinder.
SUMMARY OF THE INVENTION An object of the present invention is to provide a crawler traveling type working vehicle capable of expanding the above-mentioned adjustment range while avoiding a decrease in the strength of a truck frame.

[0004]

The constitution, operation and effect of the invention according to claim 1 are as follows.

[Structure] A track frame supporting the ground contact side of a crawler belt through a plurality of grounding rollers arranged in the longitudinal direction of the machine, and a pair of front and rear swingers connecting the track frame to the machine frame of the traveling machine. The front end of the body frame is vertically adjusted with respect to the track frame by vertically swinging the front link of the pair of swing links with respect to the body frame. By operating the pitching cylinder and the other rear swing link of the pair of swing links up and down with respect to the body frame, the rear end of the body frame is swing adjusted up and down with respect to the track frame. In a crawler traveling type working vehicle having a rear pitching cylinder,
Of the front rocking link and the rear rocking link, a rocking link that is located on the opposite side to the longitudinal direction of the fuselage extending from the connection point with the fuselage frame; Between the link-side interlocking member and the cylinder-side interlocking member that interlock the pitching cylinder that swings the dynamic link, interlocking accommodation is provided that allows both interlocking members to move relative to each other by a set stroke. The track frame is not adjusted as one of the front swing link and the rear swing link, which is located on the same side as the extending direction of the two swing links, is lowered relative to the body frame. The non-adjustable swing link is configured to swing downward with respect to the body frame when the base end of the swing link abuts, due to the abutment and the interlocking flexibility.

[Operation] Of the front swing link and the rear swing link, the swing link located on the same side as the extending direction of both swing links is adjusted downward with respect to the body frame, and As a result, the track frame and the non-adjustable rocking link rotate relative to each other around these connection points, and abut on the base end of the rocking link whose track frame is not adjusted. As the cylinder lowers the swing link, the track frame and the non-adjustable swing link become an integral structure that does not rotate relative to each other due to the abutment. The non-adjustable swing link swings about the connecting axis between the dynamic link and the machine frame to the side that swings down relative to the machine frame by the stroke allowed by the interlocking interchangeability. Accordingly, in performing the swing adjustment of the body frame on the side where the contact between the track frame and the non-adjustable swing link occurs, the non-adjustable swing link is provided after the track frame comes into contact with the non-adjustable swing link. It can be swung over a wider range than ever before by the swing with respect to the body frame together with the moving link.

The portion of the track frame corresponding to the base end of the non-adjustable rocking link may be narrowed or cut so that the angle of relative rotation until the track frame and the non-adjustable rocking link come into contact with each other is larger than before. Or to be
Even if the pitching cylinder is driven to the stroke end, the adjustable range is expanded even if the track frame does not contact the non-adjustable swing link. The adjustment range can be expanded without taking measures to slow down or avoid contact.

[Effect] The adjustment range is expanded so that the body frame can be further swing-adjusted even after the track frame and the non-adjustable swing link come into contact with each other. Pitching can be adjusted advantageously. In addition, there is no need to take measures such as making the track frame thinner or making cuts, which is advantageous because the track frame can be provided with excellent strength.

The structure, operation and effect of the invention according to claim 2 are as follows.

[0010] [Structure] In the structure of the invention according to claim 1, the extending direction of the front swing link and the rear swing link is set with respect to the connection point of the front swing link and the rear swing link with the body frame. And the direction opposite to the side where the crawler drive wheels are located.

[Operation] Since the extending direction of the front swing link and the rear swing link is the same direction, the extending direction of both of the front swing link and the rear swing link is different from that of the front swing link and the rear swing link. When the swing link located on the same side is adjusted downward with respect to the body frame and the track frame and the non-adjustable swing link rotate relative to each other, the crawler belt is likely to be loosened accordingly. In comparison with this case, when the track frame and the non-adjustable swing link rotate integrally with the body frame, the crawler belt is less likely to be loosened. As a result, the track frame and the non-adjustable rocking link are connected to each other as compared with a case where the portion of the track frame corresponding to the base end of the non-adjustable rocking link is made thinner or cut to expand the rocking range of the body frame. Are integrally rotated with respect to the body frame, so that the range of swing adjustment of the body frame can be expanded while preventing the crawler belt from becoming loose.

[Effect] Although the swing of the body frame can be adjusted over a wide range, the crawler belt is hardly loosened, and the body can be adjusted to a horizontal posture while hardly coming off the crawler belt even when the traveling place is largely inclined. Pitching can be adjusted advantageously.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a cutting unit 1 for raising and processing a planted grain culm such as rice and wheat and for cutting and transporting the cut grain culm to the rear of the machine is composed of a pair of right and left crawlers. The traveling device 10, the riding-type operating unit 2, and the engine E located below the driver's seat 3 are connected to the side of the operating unit 2 of the traveling body equipped with the engine E so as to be able to move up and down, and the harvested culm from the mowing unit 1 is removed. A threshing device 4 for threshing and a grain tank 5 for storing threshing grains from the threshing device 4 are provided in the traveling machine to constitute a combine.

As shown in FIG. 2 and the like, the left and right crawler traveling devices 10 are provided with a pair of front and rear swinging members on a support portion 7 provided by connecting a sheet metal member or a tubular member to a lateral end of a body frame 6 of the traveling body. The track frame 13 is connected to the front and rear of the body by the moving links 11 and 12, and is disposed on the front side of the body with respect to the pair of swing links 11 and 12 and is rotatably mounted on the support portion 7. Crawler drive wheels 14 driven by the rotating power transmitted from the engine E to the transmission case, and are freely rotatably mounted at a plurality of locations in the longitudinal direction of the track frame 13 so as to support the ground side of the crawler belt 18. A ground contact wheel 15, a crawler tensioning wheel 16 freely attached to a rear end of the track frame 13, and the pair of support portions 7 of the body frame 13. An upper track roller 17 mounted for free rotation between the pivoting link 11 and 12, all of which wheel unit 14
The rubber crawler belt 1 wound over 17
8.

As shown in FIG. 2 and FIG. 6, a boss portion 11a located at the base end side of one of the pair of swing links 11, 12 is supported by the supporting frame body 6. A boss 7a provided by attaching a cylindrical body to the portion 7 is connected via a rotating shaft 21 that is rotatable integrally with the swing link 11 so as to rotate relative to the axis F1 of the rotating shaft 21.
The front end of the front swing link 11 is
A block body is fixedly provided on the upper surface side of the support member 3 and a boss 13a located on the rear side of the fuselage with respect to the boss portion 7a of the support portion 7 around the axis F2 of the connection shaft 19 via the connection shaft 19. Are connected to rotate relative to each other. As a result, the front swing link 11 is attached to the support portion 7 of the body frame 6 and the track frame 13 and is connected to the support portion 7 of the body frame 6 so as to be rotatable. F1 extends rearward from the fuselage, and is connected to the track frame 13 on the extension end side so as to be relatively rotatable around the axis F2.

Of the pair of swing links 11 and 12,
The other rear swing link 12 is a boss 1 located on the base end side.
2a is relatively rotated around a shaft center R1 of the rotating shaft 21 via a rotating shaft 21 which is rotatable integrally with the swing link 12 on a boss portion provided by attaching a cylindrical body to the supporting portion 7 of the body frame 6. After being connected so as to make a swing link body 12b,
Thereafter, one end is rotatably connected to the free end side of the swing link main body 12b, and the other link 12c is rotatably connected to the track frame 13 at the other end.
The rear swing link main body 12b is mounted such that its free end is located on the rear side of the fuselage with respect to the boss 7a of the support portion 7. As a result, the rear swing link 12 is attached over the support portion 7 of the body frame 6 and the track frame 13 and the support portion 7 of the body frame 6
Extends rearward from the shaft center R1 as a connection point rotatably connected to the track frame 1 at the extension end side.
3 and is rotatably connected.

A cylinder tube of a front pitching cylinder 31 composed of a hydraulic cylinder in which a piston rod 31a is interlocked with a boss 11a of the front swing link 11 via an interlocking mechanism 20 is provided by fixing a bracket to the body frame 6. Attached to the cylinder support 6a. The cylinder tube of the rear pitching cylinder 32, which is a hydraulic cylinder in which the piston rod 32a is interlocked with the boss portion 12a of the rear swing link 12 via the interlocking mechanism 20, is provided with the bracket fixed to the body frame 6. It is attached to the part 6b.

The interlocking mechanism 20 of the front swing link 11
In addition, the interlocking mechanism 20 of the rear swing link 12 also includes the rotating shaft 21 having one end connected to the boss portions 11a and 12a of the swing links 11 and 12 so as to be integrally rotatable, and the rotating shaft 21. A swinging link 22 whose base end is integrally rotatably connected to an end protruding from the boss portions 7a and 7b of the support portion 7 to the inside of the body, and a connecting pin 23 provided on the swinging link 22 The distal end side is connected to the swing link 22 so as to be relatively rotatable, and the proximal end side is pitching cylinders 31, 32.
And the yoke member 24 fixed to the piston rods 31a and 32a.

The pin hole 24a of the yoke member 24 in the interlocking mechanism 20 toward the front swing link 11 is inserted into the swing link 22 and the yoke member 2 through the pin hole 24a.
4 is formed in a long hole so as to allow interlocking flexibility allowing relative movement by a set slot talk determined by the length of the pin hole 24a.

As shown in FIG. 3, when the front pitching cylinder 31 is driven, the driving force of the front pitching cylinder 31 causes the front swing link 11 to swing up and down with respect to the body frame 6. The connection point with the track frame 13 is set as a reaction point, and the front end side of the body frame 6 is vertically swung about the free end side of the rear swing link 12 as the center of rotation. As shown in FIG. 4, when the rear pitching cylinder 32 is driven,
The rear swing link 12 is operated to swing up and down with respect to the body frame 6 by the driving force described above, so that the connection point with the track frame 13 is set as a reaction force point, and the rear end side of the body frame 6 is connected with the front swing link The front swing link 11, which is a connection point with the track frame 13, is vertically swung about a rotation axis F2 with respect to the track frame 13 as a rotation center.

Therefore, the front swing link 11 is operated to swing up and down with respect to the machine frame 6 by the front pitching cylinder 31 so that the front end of the machine frame 6 is rotated about the free end side of the rear swing link 12 as the center of rotation. And can be adjusted up and down with respect to the track frame 13.
, The rear swing link 12 is vertically swung with respect to the body frame 6, and the rear end side of the body frame 6 is pivoted about the rotation axis F 2 of the front swing link 11 as the track frame 13. Can be adjusted vertically. As shown in FIGS. 4 and 5, when the rear pitching cylinder 32 adjusts the rear end side of the body frame 6 to swing upward, the track frame 13 swings with respect to the front swing link 11. When the contact portion 13c provided with the cushion material attached to the front end of the track frame 13 abuts on the boss 11a on the base end side of the front swing link 11, the track frame 13 and the front swing The link 11 is an integral structure that does not relatively rotate due to abutment, and a connecting shaft center between the front swing link 11 and the body frame 13 for the interlocking accommodation of the swing link 22 and the yoke member 24. To the side where the front swing link 11 swings down with respect to the body frame 6 around the shaft center F1 and swings by the stroke allowed by the interlocking flexibility, and the rear end side of the machine frame 6 swings up. That. At this time, the body frame 6 is connected to the shaft center F which is a connection shaft center of the front swing link 11 and the body frame 6.
Swing up around one.

As shown in FIG. 7, the front pitching cylinder 31 and the rear pitching cylinder 32 interlocked with the swing links 11 and 12 of the left crawler traveling device 10, and the swing links 11, 20 of the right crawler traveling device 10. The pitching control device 34 is linked to the electromagnetic control valves 33 of the front pitching cylinder 31 and the rear pitching cylinder 32 which are linked with the pitcher 12, and the pitching control device 34 has a front-rear inclination angle sensor 35 and a front-rear inclination angle setting device 36. It is linked.

The front-rear inclination sensor 35 is attached to the body frame 6 of the traveling body or to a device mounted on the body frame 6 to detect the inclination angle of the traveling body in the front-rear direction. The signal is output to the pitching control device 34.

The pitching control device 34 is composed of a microcomputer, and receives information from the front-rear tilt angle sensor 35 and the front-rear tilt angle setting device 36 and the stroke sensor 37 provided for each of the plurality of pitching cylinders 31 and 32. The pitching cylinders 31 and 32 are automatically operated as follows by automatically outputting a predetermined operation signal to each electromagnetic control valve 33 based on the above information. That is, when the longitudinal inclination sensor 35 detects that the longitudinal inclination of the body is out of the inclination angle range set by the longitudinal inclination setting device 36, the left and right front pitching cylinders are restored so as to restore the set angle range. 31 or the left and right rear pitching cylinders 32 are simultaneously driven by the same amount to correct the longitudinal posture of the aircraft. At this time,
Which of the front and rear sides of the front pitching cylinder 31 or the rear pitching cylinder 32 should be selected for driving operation is determined by determining whether the stroke sensors 37 of the front pitching cylinder 31 and the rear pitching cylinder 32 have reached the stroke limit. Then, the height of the body frame 6 is controlled to be lower, and when it is determined that the stroke limit has been reached, the front pitching cylinder 31 on the opposite side is controlled.
And the rear pitching cylinder 32 are operated in the opposite direction.

Thus, even if the traveling place is inclined forward and backward, the pitching control means 34 controls the front pitching cylinder 31 based on the information from the longitudinal inclination angle sensor 35.
In addition, the rear pitch cylinder 32 is automatically operated, and the body frame 6 is maintained in a horizontal or close posture in the front-rear direction, so that the work can be performed while the traveling body is maintained in a horizontal or close posture.

[Alternative Embodiment] As in the above embodiment, the front and rear swing links 11 and 12 extend rearward from the connection point to the body frame 6 and the crawler drive wheel 14 is connected to both swing links 11 and 12. In addition to being configured to be located on the front side of the fuselage, the front and rear swing links 11, 1
2 extends forward from the connecting point to the body frame 6 and the crawler drive wheels 14
The present invention can also be applied to a device that is configured to be located on the rear side of the fuselage from the device 12. In this case, the rear swing link 1
The interlocking mechanism for interlocking the rear pitching cylinder 32 with the interlocking mechanism 2 is provided with the interlocking accommodation.

Oscillating link 11 and pitching cylinder 31
Any specific configuration may be adopted as the interlocking mechanism 20 for interlocking with. In addition, the interlocking accommodation 24a may be provided at any portion between the swing link 11 and the pitching cylinder 31. Therefore,
The swing link 22 is called a link-side interlocking member 22, and the yoke member 24 is called a cylinder-side interlocking member 24.

The present invention can be applied to harvesters for harvesting onions, carrots, and various root vegetables in addition to combine harvesters. Therefore, combine harvesters, root crop harvesters and the like are collectively referred to as crawler traveling type work vehicles.

[Brief description of the drawings]

FIG. 1 is a side view of the entire combine.

FIG. 2 is a side view of the crawler traveling device in a horizontal state of the fuselage.

FIG. 3 is a side view of the crawler traveling device in a state in which the body is ascended forward.

FIG. 4 is a side view of the crawler traveling device in a rearwardly rising state of the fuselage.

FIG. 5 is a side view of the crawler traveling device in a rearwardly rising state of the fuselage.

FIG. 6 is a mounting structure of a front swing link.

FIG. 7 is a block diagram of pitching control.

[Explanation of symbols]

 6 Body Frame 11 Front Swing Link 12 Rear Swing Link 13 Track Frame 14 Crawler Drive Wheel 15 Ground Rolling Wheel 18 Crawler Belt 22 Link Side Interlocking Member 24 Cylinder Side Interlocking Member 31 Front Pitching Cylinder 32 Rear Pitching Cylinder

Claims (2)

[Claims] 1. A track frame for supporting a ground contact side of a crawler belt via a plurality of grounding rollers arranged in a longitudinal direction of a machine body, and a pair of front and rear swings connecting the track frame to a body frame of a traveling machine body. A front pitching for vertically adjusting the front end side of the body frame with respect to the track frame by vertically swinging the link and one of the pair of swing links with the front swing link with respect to the body frame. After adjusting the rear end side of the body frame vertically with respect to the track frame by vertically swinging the cylinder and the other rear swing link of the pair of swing links with respect to the body frame. A crawler traveling type working vehicle comprising a pitching cylinder, wherein both of the front swing link and the rear swing link are connected to a body frame. Link-side interlocking member and cylinder-side interlocking member that link a swinging link, which is located on the opposite side to the direction in the longitudinal direction of the machine extending from the swinging link, and a pitching cylinder that swings the swinging link. In addition to providing interlocking accommodation that allows both interlocking members to move relative to each other by a set stroke, the front swing link and the rear swing link are on the same side as the extending direction of both swing links. As the swing link located at the lower position is adjusted with respect to the body frame, the track frame abuts against the base end of the swing link which is not adjusted. A crawler traveling type work vehicle, wherein a swing link that is not adjusted swings downward with respect to the body frame. 2. The extension direction of the front swing link and the rear swing link is defined as a side where a crawler drive wheel is located with respect to a connection point of the front swing link and the rear swing link with a body frame. 2. The crawler traveling type working vehicle according to claim 1, wherein the direction is an opposite direction.