JPH0439289B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a rolling device such as a combine harvester, and the present invention relates to a rolling device such as a combine harvester, and is capable of rolling the working device against the vehicle body and maintaining the working device in a horizontal position even if the vehicle body tilts from side to side. It can be used for combine harvesters, rice transplanters, and other tractor working equipment.

Conventional technology A configuration in which a substantially horizontal rolling axis in the longitudinal direction is provided between the machine frame on the vehicle body side and the machine frame on the work equipment side, and the work equipment is rotated around the rolling axis with respect to the machine frame on the vehicle body side. It is said that

Problems to be Solved by the Invention In the rolling mode, which uses a rolling cylinder that expands and contracts hydraulically around the rolling axis to change the horizontal inclination of the working device or to make it horizontal, the working device is connected to the rolling axis and the rolling cylinder. Because it is supported by the machine frame on the vehicle body side by a cylinder, the support structure is unstable, and it is susceptible to external forces other than in the rolling direction, and it may sway due to vibrations when the machine is running or working. It is easy to roll, and the rolling control is also easy to go awry.

Means for Solving the Problems In the present invention, a work frame 4 having a work device 3 is provided in a work machine frame 2 that can be raised and lowered with respect to a vehicle body 1 so as to be able to roll freely, and the work machine frame 2 and work frame 4 are A rolling cylinder 12 for controlling rolling by expansion and contraction is provided on one side of the rolling shaft 11 between the two.
A rolling device such as a combine harvester is provided with a link mechanism 13 on the other side that can be expanded and contracted by rolling.

Effect of the Invention When performing a predetermined work with the working device 3 while moving and propelling the vehicle body 1, when raising and lowering or adjusting the elevation of the working device 3, the working device frame 2 on which the working device 3 is installed is moved against the vehicle body 1. to raise and lower it. Further, the rolling of the working device 3 is performed by rotating the working frame 4 about the rolling shaft 11 with respect to the working device frame 2, so that the vehicle body 1 is rolled evenly on the left and right by the working soil surface. When the vehicle body 1 is tilted to the side, the working device 3 is maintained in a horizontal position regardless of the tilt of the vehicle body 1 by a rolling control device or the like.

Such rolling action is caused by rolling axis 1
The work frame 4 is rotated about the rolling shaft 11 with respect to the work machine frame 2 by the expansion and contraction of the rolling cylinder 12 located on one side of the rolling cylinder 1. Since the link mechanism 13 located therein expands and contracts the space between the working machine frame 2 and the working frame 4, it provides resistance to the working machine 3 and reduces rocking.

Effects of the Invention In this way, the work machine frame 2 and the work frame 4 on the side of the work device 3 are connected to each other by a rolling cylinder 12 for controlling rolling on one side with respect to the rolling shaft 11. Since the other side is connected by a link mechanism 13 that can be expanded and contracted, the rolling support of the work frame 4 to the work machine frame 2 is stable, and it is not easily affected by external forces other than rolling control, and the work equipment 3 can be swayed. There is little movement. Therefore, the working device 3 can be stabilized not only during work but also in an elevated position, and rolling can be maintained accurately.

Embodiment In the illustrated example, the combine harvester has a vehicle body 1 having a pair of left and right running devices 17 in the form of crawlers, a threshing device 9 is mounted on one side, and a control device 18, a prime mover, and a grain tank are mounted on the other side. 19 etc., and a reaping device 3 is installed as a working device on the front side of the vehicle body 1.
A grain culm transfer device 10 is provided between the reaping device 3 and the threshing device 9.

The reaping device 3 has an upper end portion of a working machine frame 2 made of a cylindrical material rotatably provided on a transmission device 20 located at the front part of the vehicle body 1 around a horizontal axis 21 in the horizontal direction. A cylindrical portion of the same shape at the center of the work frame 4 is connected to the lower end extension of the work frame 4 by rolling metals 5 and 6. This work frame 4 includes a weeding frame 22 which is each part of the reaping device, and a grain culm lifting device 2 for raising grain culms.
3. A raking device 24 for raking the grain culm backward after standing up;
A cutting blade device 25 or the like is provided to cut the stock base of the raked grain culm.

The rolling metal 5 is fixed to the lower end of the work machine frame 2, and the rolling metal 6 is fixed to the upper end of the work frame 4, and the contact surfaces 14 of these rolling metals 5 and 6 are in the vertical direction. They are formed and overlapped with an O-ring 41 interposed therebetween, and a shaft hole into which the front and rear horizontal rolling shaft 11 is fitted is formed on one left and right side, so that the shaft hole can be relatively rotated around the rolling shaft 11. Further, on the other side, a guide part 15 having a U-shaped guide groove in plan view is formed on the rolling metal 5 side, and a guide part 16 consisting of a guide piece on the rolling metal 6 side is fitted into this guide part. It has a configuration that allows rolling rotation around a rolling shaft 11, and prevents both rolling metals 5 and 6 from opening forward and backward together with this rolling shaft 11.

A power transmission shaft 35 is installed inside the work machine frame 2 and the work frame 4.
is provided, and is transmitted and rotated from above the horizontal shaft 21, and is connected to the cutting blade device 2 via a transmission mechanism within the work frame 4.
5. The raking device 24, the grain culm lifting device 23, etc. are configured to transmit power. By providing a configuration such as providing universal joints at the positions of the rolling metals 5 and 6, rolling and transmission can be performed.

The work equipment frame 2 has a lifting cylinder 2 between it and the vehicle body 1.
6. It is configured to be able to move up and down about the horizontal axis 21 via a bending link 27 etc., and this bending link 27
Support shafts 29 and 30 at both left and right ends of the support member 28 are fixed to the work machine frame 2 and pivoted to the tip of the support member 28 .
A rolling cylinder 12 that is extendable and retractable by hydraulic pressure is provided between one of the support shafts 29 and the side part of the work frame 6, and the other side rolling shaft 11
Between the side support shaft 30 and the side part of the work frame 6, a link mechanism 13 consisting of a four-point link 31 allows the work frame 6 to rotate approximately up and down around the rolling shaft 11. We have established a mutually beneficial relationship. Each of the four-point links 31 is connected by a swivel bearing and is configured to follow the rotation of the work frame 6 about the rolling shaft 11 in an arcuate trajectory when viewed from the front.

A horizontal sensor 32 for detecting the inclination and horizontal posture of the reaping device 3 is provided near the extension line of the rolling shaft 11 of the reaping device 3, and this horizontal sensor 32 and the rolling valve 34 of the hydraulic circuit 33 of the rolling cylinder 12, etc. constitutes a rolling device 8;
When the vehicle body 1 tilts left and right, this is detected by the horizontal sensor 32.
The rolling valve 34 is switched based on the signal from the horizontal sensor 32 to expand and contract the rolling cylinder 12, and the cutting blade device 2 of the reaping device 3 is
The fifth section is controlled to be horizontal in the left and right direction. When the horizontal sensor 32 detects the horizontal position, the rolling cylinder 12 is not expanded or contracted but maintains that position. This horizontal sensor 32 is attached to the constituent members of the reaping device 3 in a vibration-proof manner by interposing a suitable elastic body such as a rubber material or a spring.

A parallel detection mechanism 7 consisting of a limit switch 36 and a cam surface 37 is provided between the rolling metals 5 and 6, and a parallel detection mechanism 7 is provided between the rolling metals 5 and 6. The parallel valve 38 of the hydraulic circuit 33 is switched to extend and retract the rolling cylinder 12 at the position where the limit switch 36 does not come into contact with the cam surface and the position where the limit switch 36 makes deep contact with the cam surface. are operated to a neutral parallel position, and the reaping device is placed in a left-right parallel position with respect to the vehicle body 1. When this parallel position is reached, limit switch 3
6 is turned off to put the parallel valve 38 in a neutral state and maintain the parallel attitude of the reaping device 3. Further, the range of the cam surface 37 that is set at this neutral position is set within a certain angular range.

The parallel control by the parallel detection mechanism 7 and the rolling control of the rolling device 8 by the horizontal sensor 32 can be switched by the control device 18 by operating a control switch.

The working machine frame 2 can be raised and lowered around the horizontal axis 21 by expanding and contracting the lifting cylinder 26, and a cutting height detection sensor is provided in the weeding frame 22 of the cutting device 3 to detect the height from the cutting ground. Accordingly, the elevation control of the hydraulic circuit is controlled via a parallel valve to maintain the cutting height at a set height.

The collecting and feeding section 39 located at the rear of the scraping device 24 is
Grain culms after reaping are collected from the left and right, and the front sides of the rolling metals 5 and 6 are extended toward the threshing device 9 side diagonally rearward and upper, and are transferred to the starting end of the grain culm transfer device 10 at the rear. It is structured as possible. The rolling shaft 11 covers this collecting portion 39 of the width of the reaping device 3.
The transfer device 10 and the transfer device 10 are provided so as to be offset toward the connection portion side. On the outside of the threshing device 9, a threshing transfer device 40 is provided that clamps and transfers the stock base of the threshing culm in the front-rear direction, and takes over the grain culm transferred from the transfer device 10 and transfers the tip portion to the threshing room. Supply and thresh. This transfer device 10 has a configuration in which the rear end portion is freely rotatable around a horizontal shaft 21 and is transmitted from the horizontal shaft 21, and the tip portion is engaged with a stock head transfer device that pinches and transfers the stock head portion. A grain handling depth sensor installed on the front side of the threshing device 9 detects the handling depth of the grain culm and adjusts the handling depth to the set length. It may be configured to control the transfer device 10 by moving it up and down.

A cam 42 that is higher on the rolling shaft 11 side and lower on the side away from the rolling shaft 11 is provided on the upper edge of the rolling metal 6, and an arm 43 that projects downward from the frame of the grain culm transfer device 10 is attached to the edge of the cam 42. The grain culm transfer device 10 is moved up and down around the horizontal shaft 21 by sliding the arm 43 into sliding contact with the cam 42 as it rotates around the rolling shaft 11. That is, the distance from the rolling shaft 11 to the left and right lateral ends of the cutting blade device 25 is large;
Rolling cylinder 1 on the right side when facing the direction of travel A
When the reaping device 3 rolls to the right by lowering the edge of the cam 42 on the side closer to the second side and raising the edge of the cam 42 on the opposite side, the cam 42 of the rolling metal 6 rotates the grain. When the arm 43 of the culm transfer device 10 is pushed upward, and conversely, when the reaping device 3 rolls to the left, the arm 43 is lowered, thereby changing the position where the grain culm transfer device 10 holds the grain culm from the ear tip side. The relationship is maintained within a fairly constant range.

In combine harvester work, as the vehicle body 1 is moved forward by the traveling device 17, the grain culms that have been weeded by the weeding frame 22 are erected by the grain culm lifting device 23 and raked by the raking device 24. While doing so, cut the base of the stock with the cutting blade device 2.
Reaped in 5. This reaped grain culm is transferred to the rolling shaft 1 by a collecting section 39 on the rear side of the raking device 24.
1 upper part, the grain culm transfer device 10 on the rear side is transferred, and the grain culm transfer device 10 is transferred and supplied from the rear end to the threshing transfer device 40 of the threshing device 9, and the ear portion is sent to the threshing room. It is fed and threshed.

The reaping height of the grain culm can be changed and adjusted by expanding and contracting the lifting cylinder 26, and when the lifting cylinder 26 is extended, the bending link 27 is opened.
The work machine frame 2 is rotated upward around the horizontal axis 21,
Rolling metal 5, 6 and rolling shaft 11
etc., the reaping device 3 is raised. Further, when the lifting cylinder 26 is contracted, the reaping device 3 is lowered.

In such cutting height adjustment or control, at the transfer section from the collection and feeding section 39 of the harvested, collected and fed grain culms to the grain culm transfer device 10, the vertical interval between these changes and the gripping of the grain culms by the grain culm transfer device 10 is changed. When the position changes, this grain culm transfer device 10 is adjusted up and down or adjusted to adjust the clamping position from the ear side within a certain range, and the supply depth to the threshing device 9 is kept constant. .

When performing rolling control on the reaping device 3 under conditions such as a soft reaping soil surface, the rolling control operation switch is turned on and the parallel control switch is turned off. When the traveling device 17 tilts so that the right side sinks toward the traveling direction A as shown in FIG. Rotate it to the left until it is in a horizontal position (Figure 4). In this horizontal position, no signal is emitted from the horizontal sensor 32, so the rolling valve 34 is in the neutral position and the rolling action is stopped.

Conversely, when the traveling device 17 tilts to the left as shown in FIG. Figure 6).

When such rolling action is stopped and switched to parallel control, the parallel detection mechanism 7 is activated, and if the reaping device 25 is rolled beyond a certain parallel position range with respect to the vehicle body 1, the limit switch 36 is activated. is detected, the parallel valve 38 is activated, the rolling cylinder 12 is extended or contracted, and the reaping device 3 is controlled to be in a position substantially parallel to the vehicle body. When this parallel control is completed, the limit switch 36 of the rolling metal 6 faces the neutral position of the cam surface 37, so the parallel valve 38 is in the neutral state, and the parallel posture of the reaping device 3 is maintained regardless of the horizontal inclination of the vehicle body 1. It remains stopped and can be run or harvested.

When the reaping device 3 is rolled or controlled in parallel by the expansion and contraction of the rolling cylinder 12,
Link mechanism 13 between support member 28 and work frame 4
is expanded or contracted. This link mechanism 13 is extended and contracted along the rolling operation direction of the reaping device 3 by a four-point link, and provides great resistance to expansion and contraction, rotation, twisting, etc. in other directions. For this reason, the reaping device 3 is less likely to swing significantly relative to the working machine frame 2.

In the rolling operation, when the reaping device 3 is controlled to roll to the left, the lower portion of the cam 42 of the rolling metal 6 is brought into sliding contact with the arm 43, and the starting end side of the grain culm transfer device 10 is moved to the collecting section 39. It is adjusted so that the handling depth to the threshing device 9 is shallow by bringing the grains closer together. Further, when the reaping device 3 is controlled to roll to the right, the high portion E of the cam 42 comes into sliding contact with the arm 43, and the starting end side of the grain culm transfer device 10 is separated from the collecting section 39, thereby increasing the handling depth. Adjust to deepen the depth. In this way, when the reaping device 3 is rolled left and right, the grain culm inheritance relationship between the reaping device 3 and the grain culm transfer device 10 is adjusted, and the handling depth to the threshing device 9 is made constant.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Figure 1 is a partial plan view, Figure 2 is a side view, and Figures 3 to 6.
The figure is a front view showing the operation, Fig. 7 is a partially enlarged front view, Fig. 8 is a side view, Fig. 9 is a partially plan view, Fig. 10 is a partially exploded rear view, and Fig. 11 is a partially enlarged front view. The figure is a side sectional view thereof, and FIG. 12 is a hydraulic circuit diagram. In the figure, 1 is the vehicle body, 2 is the working machine frame, 3 is the reaping device (working device), 4 is the work frame, 5 and 6 are rolling metals, 7 is the parallel detection mechanism, 8 is the rolling device, and 9 is the threshing device , 10 is a grain transfer device, 11
is a rolling shaft, 12 is a rolling cylinder, 1
3 is a link mechanism, 14 is a contact surface, 15 and 16 are guide parts, 17 is a traveling device, 24 is a grain culm rake device, 2
5 is a cutting blade device, 26 is a lifting cylinder, 32 is a horizontal sensor, 34 is a rolling valve, 36 is a limit switch, 37 is a cam surface, 38 is a parallel valve,
39 indicates a collection and transport section.

Claims (1)

[Claims] 1. A work frame 4 having a work device 3 is provided on a work machine frame 2 that is raised and lowered with respect to the vehicle body 1 so as to be able to roll freely, and between the work machine frame 2 and the work frame 4, a rolling shaft 11 is mounted on one side of the rolling shaft 11. is provided with a rolling cylinder 12 that controls rolling by expansion and contraction, and a link mechanism 13 that can be expanded and contracted by rolling on the other side.
A rolling device such as a combine harvester that is equipped with a