JPS5941939Y2 - Elevating device for the reaping work section of a combine harvester - Google Patents

Description

[Detailed description of the invention] The present invention provides a combine harvester in which both ends of a hydraulic cylinder are connected to the body of the combine and the machine frame of the reaping section supported by the body so as to be movable up and down. The present invention relates to an improvement in a lifting device for a reaping work section, which is configured to raise and lower the reaping work section.

In this type of combine harvester equipped with a lifting device for the reaping work section, when reaping work is performed, the hydraulic cylinder is contracted to bring the reaping work section to a lowered position where it can almost touch the ground. When the reaping work is carried out or loaded onto a transport vehicle, the hydraulic cylinder is extended to bring the reaping section to a raised position where it can be moved far away from the ground.

According to the conventional elevating device for the reaping work section, the expansion and contraction stroke of the hydraulic cylinder is constant, and the position of the Q connection point at both ends of the hydraulic cylinder with respect to the combine harvester body and the machine frame of the reaping work section remains constant. Therefore, the lowered position and the raised position are always constant.

However, in the case of a combine harvester, it is desirable to be able to change and adjust the lowered or raised position of the reaping unit depending on various conditions such as the properties of the field.

That is, for example, if the lowering position is set so that upright culms in dry rice fields can be reaped well, there is a possibility that reaping work in wet fields or reaping work of fallen culms cannot be done well. It is.

Therefore, the present invention provides an improved elevating device for the reaping work unit that allows the lowering and raising positions of the reaping work unit, which are determined by the expansion and contraction of the hydraulic cylinder, to be adjusted as needed. It is designed to always perform well regardless of the properties and other conditions.

The lifting device for the reaping work section of the present invention solves this problem.
The above-mentioned lifting device can be improved to allow one end of the hydraulic cylinder to be connected to the combine harvester body via an appropriate connection mechanism, and the reaping work section can be moved up and down within an appropriate range while the hydraulic cylinder is held at a constant length. In order to achieve this, an operating mechanism is provided which connects the hydraulic cylinders so as to be displaceable and allows the connection point position of one end of the hydraulic cylinder to be displaced to an arbitrary displacement position.

Next, to explain one embodiment with reference to the drawings, in the illustrated combine harvester 1, reference numeral 2 denotes a reaping work section disposed at the front of a machine body 6 equipped with a traveling device 3, a threshing device, a driver's seat 5, etc.; 2 is composed of a weeding body T pulling device 8, a cutting blade device 9, etc., and is connected to the combine harvester 1 via a support tube 10.
It is supported by the fuselage 6 so as to be able to move up and down.

A drive shaft 11 that receives power from an engine (not shown) is installed in a suitable place on the fuselage 6 of the combine 10 and on the front wall of the threshing device 4. A transmission cylinder 12 horizontal to the width direction of the combine 1 can be freely rotated. The support tube 10 is fixed to the transmission tube 12 via a gear box 14, and the reaping work section 2 is supported via the support tube 10 so as to be movable up and down around the transmission tube 12. It is a necessity.

The support tube 10 is equipped with a transmission shaft 15 to which power is transmitted from the drive shaft 11 through a gear box 14, and the transmission shaft 15 allows the reaping section 2 to be raised regardless of vertical displacement. Each device of the reaping work section 2, such as the device 8, is driven.

Reference numeral 16 denotes a lifting device for raising and lowering the reaping work section 2 supported by the body 6 of the combine harvester 1 so as to be movable up and down. It is constructed by connecting both ends of a hydraulic cylinder 17 having an appropriate expansion/contraction stroke to the appropriate position of the frame, that is, the support tube 10, and the appropriate position of the body 6 of the combine harvester 1, and when the hydraulic cylinder 11 is contracted, the reaping work section 2 When the hydraulic cylinder 11 is brought to a lowered position (solid line position in FIG. 1) where it can almost touch the ground and the hydraulic cylinder 11 is extended, the reaping section 2 is raised to the raised position shown by the chain line in FIG.
The lifting device 16 according to the present invention has the following improvements.

That is, as shown in FIGS. 3 and 4, the hydraulic cylinder 17
One end is pivotally connected 19 to the support cylinder 10 via a connecting body 18 as usual, but the hydraulic cylinder 1
The other end of 7 includes a support box 20 having an inclined cylindrical portion 20a fixed at a proper location on the fuselage 6 of the combine 1 and substantially directly below the gear box 14, and a cylindrical portion of the support box 20. It is connected 24 to the body 6 of the combine harvester 1 via a connecting mechanism 22 consisting of a connecting body 21 having a connecting tube 21a fitted into the shaped portion 20a so as to be movable in the downward direction on the road. In particular, the other end of the hydraulic cylinder 17 is connected to the connecting body 21.
They are loosely connected 24 through elongated holes 21b formed in the holes 21b.

Therefore, by displacing the connecting body 21, that is, the connecting cylinder 21a, to an appropriate position and displacing the position of the connecting point 24 of the hydraulic cylinder 17 with respect to the fuselage 6 of the combine 10, the above-mentioned lowering and raising positions of the reaping work section 2 can be adjusted. The position of the reaping work unit 2 is changed as appropriate so that the reaping work unit 2 is allowed to rise within the range of the elongated hole 21b when the reaping work unit 2 is placed in an appropriate lowered position or raised position. It is designed so that it can be carried out.

Furthermore, an operating mechanism 25 is provided for displacing the connecting point 24 of the hydraulic cylinder 11 to an arbitrary displacement position. The driver's seat 5
It is placed in the vicinity of .

That is, the female screw body 27 is fitted and fixed to the connecting cylinder 21a, and the screw shaft 28 screwed into the female screw body 2T is supported in the support box 20 so as to be rotatable and immovable in the axial direction.
The screw shaft 28 and an operating shaft 29 of an operating knob 26 disposed near the driver's seat 5 are interlocked and connected via a first operating shaft 30, a second operating shaft 31, and a third operating shaft 32. When the operator in the driver's seat 5 rotates the operating knob 26, the screw shaft 2B is rotated and the connecting tube 21a, that is, the connecting point 21, is displaced in the vertical direction.

The interlocking system between the screw shaft 28 and the operation shaft 29 of the operation handle 26 is as shown in FIG.
An operating shaft 30 is interlockingly connected to the first operating shaft 30 via bevel gears 33 and 34, and a second operating shaft 31 vertical to the first operating shaft 30 is interlockingly connected via bevel gears 35 and 36.
A third operating shaft 32 parallel to the third operating shaft 32 is interlocked with the third operating shaft 32 via bevel gears 37 and 38, and an operating shaft 29 parallel to the third operating shaft 32 is connected to a spur gear 39 of a size corresponding to the diameter of the third operating shaft 32.
, 40, and the operation handle 260 can be rotated easily, but the screw shaft 28 is not unexpectedly rotated due to the weight of the reaping work unit 2, and the operation handle 260 can be rotated easily. It is devised so that the connecting point 24 is reliably held at a fixed position, unless the connecting point 26 is rotated.

As can be understood from the above description, according to the elevating device 16 configured as described above according to the present invention, by rotating the operating handle 26 and rotating the screw shaft 28 in either direction, the combine The connection point 24 of the hydraulic cylinder 11 with respect to the machine body 6 of 1 can be positioned at any displacement position within a certain range, and by displacing the connection point 24 downward, the reaping work section 2 can be lowered further. If the connecting point 24 is displaced upward, the reaping section 2 can be displaced to a higher position.

Therefore, the reaping work performed by reducing the hydraulic cylinder 17 and bringing the reaping work section 2 to the lowered position (solid line position in FIG. 1) can always be performed satisfactorily regardless of various conditions such as the properties of the field.

That is, for example, when reaping a fallen culm, the descending position of the reaping work unit 2 is moved further down, and when reaping work in a wet field where the traveling device 3 is likely to sink, the above-mentioned This is because the lowered position of the reaping work section 2 can be changed and adjusted to the position most suitable for the working conditions, such as by keeping the lowered position upwardly displaced by an appropriate amount from the lowered position in dry field work.

Furthermore, even when the combine harvester 1 is being moved over a ridge or loaded onto a transport vehicle by extending the hydraulic cylinder 1T and bringing the reaping work unit 2 to the raised position (the chain line position in Figure 1), the raised position can be changed and adjusted. By doing so, these various operations can be carried out efficiently depending on the conditions at the time.

For example, the climbing ability of the combine harvester 1 can be improved by moving the raising position of the reaping work section 2 further upward during loading work on a transport vehicle.

As in the above-mentioned embodiment, the operating handle 26 is placed in a position where the operator can operate the driver's seat 50 (and the lowered or raised position of the reaping section 2 can be immediately adapted to changes in the work situation during the work). It is convenient to be able to change and adjust it to suit your needs.

Furthermore, in the embodiment, the hydraulic cylinder 17 and the connecting body 21 are loosely connected 24 through the elongated hole 21b, so that the reaping section 2 can be displaced upward within the range of the elongated hole 21b. Therefore, even if a force in the direction of lifting the reaping work unit 2 unexpectedly acts on the reaping work unit 2, the reaping work unit 2 will not collide with an obstacle when unloading the combine harvester 1 from a transport vehicle, for example. Even when a force is applied in the lifting direction, the reaping work part 2 is forced to move upward against its own weight, so there is no risk of damage to the connecting part between the reaping work part 2 and the hydraulic cylinder 17, etc. Extremely advantageous.

Note that the lifting device 16 is connected to the connection point 24 as in the above embodiment.
The present invention is not limited to a configuration in which the position is changed and adjusted in a stepless manner, but it is of course possible to be configured in such a manner that the connection point 24 is changed and adjusted in a stepwise manner. This can be expected (not shown).

According to the elevating device for the reaping work section of the present invention, the position of the connection point of the hydraulic cylinder with respect to the body of the combine is changed and adjusted by the operating mechanism, and even though the extension and contraction stroke of the hydraulic cylinder is constant, the reaping work section can be raised and lowered. Since the lowered position or the raised position can be adjusted as appropriate, the reaping work section can be brought to the most suitable position for the working conditions, and various combine harvesting operations can always be performed satisfactorily.

In addition, the lifting device of the present invention adjusts the displacement of the lowered position or raised position of the reaping work section by changing the position of the connection point of the hydraulic cylinder using an extremely simple connecting mechanism and operating mechanism. Despite having such excellent effects, the combine harvester can be provided at low cost and is extremely economical.

Furthermore, as in the embodiment described above, if the operating part of the operating mechanism (the operating handle 26 in the embodiment) is placed near the driver's seat, the operator can harvest the crops without leaving the driver's seat even during work. The position of the working part can be immediately changed and adjusted, thereby improving work efficiency.

[Brief explanation of the drawing]

The figure shows an example of the lifting device according to the present invention.
Figure 1 is a side view of the combine, Figure 2 is a plan view of the same, and Figure 3 is a side view of the combine harvester.
The figure is a vertical sectional view of the lifting device, and Figure 4 is IV-IV in Figure 3.
FIG. 5 is a cross-sectional view taken along the line, and a perspective view schematically showing the elevating device. 1... Combine harvester, 2... Reaping work section, 5... Driver's seat, 6... Machine body, 10.
...Support cylinder (machine frame), 16 ... Lifting device, 1T ... Hydraulic cylinder 22 ... Tie-up mechanism, 24 ... Connection point , 25... operation mechanism, 26... operation handle (operation section).

Claims (1)

[Scope of Claim for Utility Model Registration] l Both ends of a hydraulic cylinder are connected to the body of a combine harvester and the machine frame of a reaping work unit which is supported by the combine body so as to be able to move up and down, and the reaping work unit is controlled by the hydraulic cylinder. In a lifting device for a reaping work section configured to raise and lower, one end of the hydraulic cylinder is connected to the fuselage of the combine via an appropriate connection mechanism, and the reaping work section is moved within an appropriate range while the hydraulic cylinder is held at a constant length. A reaping working part in a combine harvester, characterized in that the reaping work part of a combine is provided with an operating mechanism displaceably connected to the hydraulic cylinder so as to be able to move up and down at one end, and to displace and operate a connection point position of one end of the hydraulic cylinder to an arbitrary displacement position. lift device. 2. The elevating device for the reaping work section of a combine harvester according to claim 1, wherein the operating section of the operating mechanism is disposed near a driver's seat of the combine harvester.