JPH0361423A - Traveling device of combine or the like - Google Patents

Abstract

PURPOSE:To control pitching of stable support constitution and machine by equipping a single pitching hydraulic cylinder to vertically rotate a machine by expansion and contraction of hydraulic pressure at a position displaced to left or right heavier side of weight of machine. CONSTITUTION:Either front or rear end of a machine 10 to load a working device such as thresher on the upper side is vertically rotatably equipped around a pitching shaft 7 on a body 1. Then a single pitching hydraulic cylinder 8 to vertically rotate the machine 10 based on the body 1 by expansion and contraction of hydraulic pressure is furnished at a position displaced to left or right heavier side of weight of the machine 10. Consequently, pitching of stable support constitution and machine is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a traveling device such as a combine harvester, and has a structure in which the machine body can be pitched vertically with respect to the vehicle body by tilting the machine body in the longitudinal direction, etc. For mobile agricultural machinery such as combines that are maintained and controlled, and for earthworks +! Can be used for & machines, etc.

Conventional technology The fuselage of the combine, which supports working equipment such as the cockpit, threshing equipment, and reaping equipment, is equipped with left and right crawlers that can be controlled to move up and down, and a rolling control system that maintains the left and right horizontal posture. (Unexamined Japanese Patent Publication No. 63-149
No. 274), even if the aircraft body is generally tilted in the front-rear direction along with the vehicle body, etc.

Even if the reaping height of the reaping device is moved up or down, the posture of the cockpit, etc. does not change and work can continue.

Problems to be Solved by the Invention If work continues with the machine body tilted back and forth as described above, the operating position will be unstable.

The work function of the work equipment may also be affected. The present invention solves such defects by changing the relative longitudinal inclination of the aircraft with respect to the vehicle body when the aircraft tilts forward and backward, thereby maintaining and controlling the aircraft in a horizontal horizontal posture. This stabilizes the pitching of the aircraft at this time.

Means for Solving the Problems This invention provides a machine body on which a working device such as a threshing device is mounted on the upper side, one end of which is movable up and down about a pitching axis with respect to the vehicle body, and which can be expanded and contracted by hydraulic pressure. A traveling device such as a combine harvester is configured such that a single pitching hydraulic cylinder that moves the machine body up and down with respect to the vehicle body is provided offset to the left and right sides of the machine weight.

The working vehicle body has a traveling section such as a crawler and travels, and work is performed by a working device mounted on the vehicle body. Pitching control is performed by rotating one aircraft around a pitching axis with respect to the vehicle body by expanding and contracting a pitching hydraulic cylinder. This pitching hydraulic cylinder is configured to support the aircraft by being biased toward the side where the weight of the aircraft is greater, so even if it is a single pitching hydraulic cylinder, the center of gravity of the aircraft A stable support configuration and pitching control of the aircraft are achieved by supporting the portion close to the position.

Embodiment An embodiment of the present invention will be described based on the drawings. A pair of left and right crawler frames 6 having rolling wheels 5 on which each crawler 4 is stretched are installed on both left and right sides of the vehicle body by a rolling hydraulic cylinder 2 provided on the vehicle body 1 and a rolling link machine 4ilI3 that moves up and down in parallel. , each of which can be raised and lowered independently, and on the upper part of the car body 1, the other end can be moved up and down about a pitching shaft 7 at one end of either the front or rear, and for this up and down movement. A fuselage 1 having a pitching hydraulic cylinder 8 and a pitching link mechanism 9
Set 0.

The vehicle body 1 includes a pair of left and right vertical frames that are integrally connected by front and rear connecting frames 12, and a pair of vertical frames that are
The front ends are connected by a pitching shaft 7, and the rear ends are connected by a rolling arm shaft 13. These front and rear pitching shafts 7 and rolling arm shafts 13 are connected to a rolling arm 1 that constitutes a pair of left and right rolling link mechanisms 3.
4 and 15 are provided rotatably. The front and rear sides of the crawler frame 6 are pivotally connected to the lower ends of the left and right front and rear rolling arms 14 and 15 by pivot shafts 16 and 17, respectively.

A hydraulic piston 19 of a rolling hydraulic cylinder 2 attached to a bracket 18 protruding from the front of the vehicle body 1 is connected to the upper end of this rear rolling arm 15, and the expansion and contraction of the rolling hydraulic cylinder 2 causes a force to be applied to the vehicle body 1. The left and right crawler frames 6 are moved up and down. Reference numeral 20 denotes a rond for connecting and interlocking the front and rear rolling arms 14 and 15.

Each of the left and right crawler frames 6 has a guide frame 24 and a tension rod 23 that extend and contract back and forth with respect to the rear end of the crawler 46.
By adjusting the extension and contraction of this tension rod 23, the
The structure is such that the rubber 4 is kept under tension at all times.

On the front pitching shaft 7 of the vertical frame 11 of the vehicle body 1,
A rotary boss 25 that is rotatable around the pitching shaft 7 is provided, and a bracket 26 at the front end of the fuselage 10 is configured to be detachable from the rotary boss using bolts, nuts, etc.
Further, the body 1.0 is configured to be vertically movable around the pitching shaft 7. Further, link pins 27 are provided on the rear portions of the left and right vertical frames 11 on the vehicle body, and the
The tip of the link 28 of the pitching link mechanism 9 provided in the pitching link mechanism 9 is rotatably fitted and supported.

The fuselage 10 is mainly composed of a pair of left and right vertical frames, which are connected by horizontal frames 29 at a suitable number of places in the front and rear to form an integral structure, and the front end is connected to a sprocket shaft 3 of a drive sprocket 30 by a bracket 26. The structure is such that an axle housing 32 that covers the bearing is attached and supported.

The pitching link mechanism 9 provided in the body 10 includes a pair of left and right arm links 34 that are rotatable around a pitching arm shaft 33 at the rear, and a link that is pivotally connected to the tip of the arm links 34 by a pivot pin 35. 28, and an arm 36 that rotates together with these arm links 34. This arm 36 is connected to the hydraulic piston 37 of the pitching hydraulic cylinder 8 attached to the fuselage 10, and the pitching hydraulic cylinder 8 is rotated. By rotating the link 28 around the link bin 27 of the vehicle body 1 by hydraulic expansion and contraction, the link 28 and the arm link 34 are configured to move the body top 0 up and down around the pitching axis 7.

Each of the rolling arms 14 and 15 provided at the front and rear of the vehicle body l includes an inner arm 38 formed in the shape of a crank when viewed from the front;
The plate-like outer arm 39 is tightened with POL-40 to form an integral structure, and the intermediate part of these inner arms 38 and the tip of the outer arm 39 are used.

Collar the ends of the rolling arm shafts 7 and 13 41°42
It is rotatably provided with . The vertical frame 11 fixes this collar 41 and supports the rolling arm shaft 7,
13 Along with the fuselage 10 located above, the inner and outer side arms 3
8 and 39. inner arm 3
The crawler frame 6 provided at the lower end of the roller 8 by means of pivot shafts 16, 17 is located and attached to the outside of the rolling arms 14, 15.

The fuselage 10 has a horizontal frame 29 on the upper side, and a vertical frame 43 that extends from both left and right lateral ends of the horizontal frame 29 back and forth, and on the upper side, for example, in the case of a combine harvester, a threshing device, an engine, a control device, etc. are installed. It is equipped with a structure that supports the reaping device.

Reference numeral 44 denotes a transmission case housing a traveling transmission device for transmitting the drive sprocket 30, and is integrally attached to the front end or rear end of the fuselage 10 via a bracket 26° 45, an axle housing 32, etc.

The crawler 4 has this drive sprocket 30 and each transfer sprocket 5.
The bracket 26 of the aircraft 10, which can be wound and stretched between the two and rotated and moved by the drive of the drive subwakerato 30, has a sprocket 30 placed forward of the frontmost roller 5. When the machine body 10 is positioned, it moves up and down around the pitching shaft 7 due to pitching of the body 10, but the crawler 4 is configured in a relationship that maintains the tension drive. 46 is the exhaust pipe of the engine, and 47 is its muffler cover.

The control configuration of the traveling device will be explained with reference to FIGS. 8 and 9. A hydraulic circuit for a hydraulic pump P that hydraulically operates the rolling hydraulic cylinder 2, the pitching hydraulic cylinder 8, and the reaping vertical cylinder 48 that moves the reaping device up and down with respect to the machine body 10 is provided as shown in FIG. Reaping upper and lower cylinder 48
The hydraulic circuit includes a reaping upper control valve 49 for raising the reaping. A reaper control valve 50 for lowering the reaping and the like is provided so as to be operated electromagnetically. A pitching control valve 51 is provided in the hydraulic circuit of the pitching hydraulic cylinder 8 to rotate the aircraft 10 around the pitching shaft 7 and pitch the aircraft 10 forward and downward, or vice versa. will be established.

Further, a rolling control valve 52 is provided in each hydraulic circuit of the pair of left and right rolling hydraulic cylinders 2 to switch the left or right crawler frame 6 to move up and down independently or simultaneously. 53 is an unload valve.

In FIG. 9, a controller 54 having a microcomputer includes one manual tilt lever switch 5 on the input side.
The lever switch 55 and the manual tilting lever are provided in the control device, and by operating the manual tilting lever, each tilting lever switch is turned ONL depending on the tilting direction.

The pitching control valve 51 and the rolling control valve 52 are switched and output to perform a pitching operation on one body 10, and the crawler frame 6 on the left or right side is moved up and down to perform a rolling operation.

Also, the vehicle height up/down lever switch 56. And this up and down lever switch 56t! : The vehicle height up/down lever for switching is provided on the steering device, and when the up/down lever switch 56 is operated to raise the vehicle height, the left and right rolling control valves 52 are switched to the raise side, raising the vehicle height, and When the vehicle height is lowered, the left and right rolling control valves 52 are switched to the lowering side, and a control output is performed to lower the vehicle height.
The upper reaping control valve 49 controls the reaping device upward, and the reaping control valve 50 controls the reaping device downward.

The vehicle body horizontal switch 58 controls the left and right rolling of the vehicle body l, the longitudinal pitching control, and the like. The culm sensor 59 detects that the culm is being harvested by the reaping device, and the culm sensor 59 detects that the culm is being harvested by the reaping device.The culm sensor 59 detects the state in which the culm is being harvested by the reaping device. 62,63.6
There are 4. Each inclination sensor 60, 61, stroke sensor 62, 63, 64, etc. is provided with a sensitivity changing means 65 for changing the sensitivity thereof.

Regarding the pitching control of the fuselage 10, when the longitudinal inclination sensor 60 detects the inclination of the fuselage 10 in the longitudinal direction, the pitching control valve 51 is switched to the helmsman or forward direction, and the pitching hydraulic cylinder 8 is expanded or contracted to control the pitching. A longitudinal stroke sensor 6 provided in the hydraulic cylinder 8
2 and performs feedback control to control and maintain the aircraft 10 in a longitudinal horizontal state.

Regarding rolling control on the vehicle body, when the left and right tilt sensor 61 detects the left and right tilt of the vehicle body 10 or the vehicle body, the left rolling control valve 52 or the right rolling control valve 52 is switched to control the rolling hydraulic cylinders 2 on the left and right. The amount of expansion and contraction of each rolling hydraulic cylinder 2 is detected by left and right stroke sensors 63 and 64 and feedback control is performed to control and maintain the vehicle body in a horizontal horizontal state.

Further, the height control of the vehicle body 1 is performed simultaneously with or in priority to these rolling controls, and the earth destruction surface cylinder 2 of the vehicle body 1 is controlled to expand and contract to maintain a constant height.

The pair of left and right rolling hydraulic cylinders 2 have left and right stroke sensors 63 and 64, and are arranged symmetrically with the rolling link mechanism 3 with respect to the center line of the vehicle body 1. In addition, the pitching hydraulic cylinder 8 has a front-rear stroke sensor 62, and has a heavy weight side 1 on the left and right sides of the machine body 10. For example, the engine, cockpit, paddy tank for storing harvested paddy, etc. In the type of combine harvester installed in It is possible to reduce twisting, distortion, etc. of the aircraft body 10 and perform stable pitching.

Effects of the Invention Since the present invention has the above-described configuration, it has the following technical effects. In other words, even if the aircraft is pitched relative to the vehicle body, even if it is a heavy object, a single pitching hydraulic cylinder is installed on the left and right side of the aircraft to support it, so it is close to the center of gravity. By supporting the position, the pitching of the aircraft can be performed smoothly, and the twisting and distortion of the aircraft can be reduced to create a stable configuration.The pitching hydraulic cylinder can simplify the configuration with a single pitching hydraulic cylinder, and In order to support the structure along the left and right sides of the fuselage even if it is in a position that is offset to the left or right, reinforcing members, etc. for support are provided in positions where they are likely to get in the way, such as in the center of the left and right of the fuselage. I am pure because I never have anything to do.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a side view of the traveling device, Fig. 2 is an exploded side view thereof, Fig. 3 is a plan view, and Fig. 4 is a section shown in Fig. 1 in the direction of the ■ arrow. Fig. 5 is a side view of a part of it, Fig. 6 is a front sectional view of the part shown in Fig. 1 in the direction of the ■ arrow, Fig. 7
The figure is a side view, FIG. 8 is a hydraulic circuit diagram, and FIG. 9 is a control block diagram. Explanation of symbols 1 Vehicle body 7 Pitching shaft 8 Pitching hydraulic cylinder 9 Pitching link mechanism 10 Vehicle body

Claims (1)

[Claims] One end of the machine body, which is equipped with a working device such as a threshing device on the upper side, is movable up and down about the pitching axis with respect to the car body, and the machine body is moved up and down with respect to the car body by expansion and contraction using hydraulic pressure. A traveling device such as a combine harvester that has a single pitching hydraulic cylinder shifted toward the heavier side of the machine weight.