JPH046510Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pre-processing device for a combine harvester, which includes a pulling device, a reaping device, and a device for conveying and feeding reaped grain culms to a rear threshing device.

In this type of combine harvester pretreatment device, when the machine body sinks during harvesting work in wet fields, the harvesting device is raised by an amount corresponding to the amount of sinking. In addition, the vertical height of the reaping device is changed when mowing long culms at a high height or extremely low. When the height of the reaping device is changed in this way, the attitude of the reaping device relative to the planted grain culm changes. There is a problem that the cutting performance deteriorates. Therefore, as a configuration for solving such a problem, the following configuration is conventionally known. In other words, the conveying and feeding device is pivotably pivoted up and down around a fulcrum provided at the end of the conveyance, so that the handling depth can be freely adjusted, and the fulcrum is located forward and below the fulcrum. The pulling device and the reaping device are supported by a frame that can be fixed by vertically swinging around a fulcrum that swings up and down, and the vertical height of the reaping device can be adjusted by swinging around the two fulcrums. It is configured to be foldable in stages and can be adjusted freely. Although this method can maintain reliable and good reaping performance by keeping the attitude toward the planted grain culm constant regardless of changes in the vertical height of the reaping device, it has the following disadvantages. In other words, in the positional relationship between the conveying and feeding device and the lifting device, which are configured to be able to swing up and down in order to maintain a constant handling depth regardless of the length of the harvested grain culm, the swing frame and the Due to the swinging of each of the transport and supply devices, the upper end of the lifting device and the tip of the transport and supply device gradually approach each other as the transport and supply devices swing. Therefore, in order to smoothly transfer the reaped grain culms from the lifting device to the conveying and feeding device, if the tip of the conveying and feeding device is arranged close to the pulling device side, the conveying and feeding device In a state where the device and the lifting device are not in contact with each other, the vertical swing range of the conveying and feeding device is limited to a small range,
The disadvantage is that the adjustment range of handling depth is narrowed. Conversely, in order to increase the handling depth range, that is, the vertical swing range of the conveyance and supply device, the conveyance and supply device must be installed at a position where its tip is sufficiently spaced from the lifting device. However, if this is done, there is a drawback that the transfer of the harvested grain culm from the lifting device to the conveying and feeding device cannot be carried out smoothly and reliably.

In view of these circumstances, the present invention has been designed to maintain good reaping performance regardless of changes in reaping height, while having a sufficiently large handling depth adjustment range. The purpose is to ensure that the grain culm transfer operation can be carried out reliably and smoothly.

The characteristic configuration of the present invention, which has been made to achieve the above object, is that the conveyance supply device is configured with a front conveyance device located on the upper side in the conveyance direction and a rear conveyance device located on the lower side in the conveyance direction, and A frame in which a rear end portion of the front transport device and a front end portion of the rear transport device are arranged so as to overlap each other in the transport direction, and the rear transport device is attached to the aircraft body so as to be vertically swingable around a fulcrum at the rear end portion. and supporting the front transport device on a frame attached to the frame so as to be vertically swingable and fixed around a fulcrum provided at a position spaced forward from the fulcrum of the frame; Furthermore, the raising device and the reaping device are supported by the frame.

In other words, by configuring the conveying and supplying device divided into two front and rear conveying devices, of which the front conveying device lifting device and the reaping device are supported by the swing frame, the vertical height of the reaping device can be increased by folding the reaping device in two stages. When the cutting height is changed, both the lifting device and the front conveyance device can be vertically swung together to prevent the relative postures of the two from changing due to the adjustment of the cutting height. Therefore,
By bringing the lifting device and the tip of the front conveying device very close to each other, it is possible to always reliably and smoothly transfer the harvested grain culm between the two. Moreover, since the rear conveyance device can be provided with its tip at a sufficient distance from the lifting device, the vertical swing range of the rear conveyance device can be adjusted sufficiently without contact with the lifting device. As a result, the handling depth adjustment range can be made sufficiently large, and the range of application to grain culm length can be expanded.

Embodiments of the configuration of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, a machine body 2 equipped with a pair of left and right crawler running devices 1 is equipped with an automatic threshing device 3, a device 4 for pulling up planted grain culms, and a clipper type for reaping the pulled up grain culms. A combine harvester includes a reaping device 5 and a conveying and feeding device 7 that supplies and conveys the harvested grain culm to a threshing holding and conveying device 6 of the threshing device 3.

The conveyance/supply device 7 is divided into a front conveyance device 7A and a rear conveyance device 7B, with their rear end portions 7a and front end portions 7b overlapping each other in side view.

The rear conveyance device 7B has a frame 9 which is configured to be vertically swingable around a fulcrum _P1 provided on the body 2 at the end of its conveyance by a hydraulic cylinder 8, and the rear conveyance device 7B is located at the fulcrum P1 position with respect to this frame ₉ . a vertical frame 10 extending substantially perpendicularly to the vertical frame 10, one end of which is pivotally supported by the vertical frame 10, and the other end of which is extended toward the lifting device 4 side. and a chain conveyance device 12 for pinching the ears, and the chain conveyance device 11 is configured to be vertically swingable by means of a hydraulic cylinder 13.

The front conveyance device 7A includes a frame 14 which is located forward and lower than the fulcrum P ₁ and can be vertically oscillated and fixed by a hydraulic cylinder _{15 around a fulcrum P 2 which} swings up and down around the fulcrum P 1; A chain conveying device 16 for holding the reaped grain culm and a chain conveying device 17 for pinching the ear tips are fixed to the vertical frame 14A on the rear side of conveyance, and the pulling device 4 and the reaping device 5 are fixed on the front side. By vertically swinging each of the conveying devices 7A and 7B, it can be folded into two stages. Reference numeral 18 denotes a pair of gear-like conveying devices for conveying the grain culms raised by the lifting device 4 in a bundled state.

[Brief explanation of drawings]

The drawings show an embodiment of the pre-processing device for a combine harvester according to the present invention, with FIG. 1 being a side view of the main parts, and FIG. 2 being a plan view showing the transmission mechanism. 3... threshing device, 4... pulling device, 5... reaping device, 7... conveyance supply device, 7A... front conveyance device, 7B... rear conveyance device, 7a... rear end section,
7b...front end, _P1 , _P2 ...fulcrum.

Claims (1)

[Scope of utility model registration request] A pre-processing device for a combine harvester comprising a raising device 4, a reaping device 5, and a conveying and feeding device 7 that conveys the harvested grain culm and supplies it to the threshing device 3 at the rear, the conveying and feeding device 7 comprising: It is composed of a front conveying device 7A located on the upper side in the conveying direction and a rear conveying device 7B located on the lower side in the conveying direction, and the rear end portion 7a of the front conveying device 7A and the front end of the rear conveying device 7B The rear transport device 7B is supported by a frame 9 attached to the machine body so as to be vertically swingable around a fulcrum _P1 at the rear end, and the front transport device 7A is supported by a frame 14 that is attached to the frame 9 so as to be vertically swingable and fixed around a fulcrum P ₂ provided at a position spaced forward from the fulcrum P ₁ of the frame 9, and further, A pre-processing device for a combine harvester, in which the raising device 4 and the reaping device 5 are supported by the frame 14.