JPH039618Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a combine harvester in which a frame of a reaping pretreatment section is connected to the main machine in a vertically swingable and separable manner.

[Conventional technology]

The above-mentioned combine harvester is designed so that the pre-reaping processing section can be separated from the main machine in the front, and a working space for inspection and repair can be formed between them.

Conventionally, in this type of combine harvester, as shown in Japanese Utility Model Application Publication No. 57-102939, the machine support for connecting and supporting the pre-processing section frame was made with a hydraulic cylinder, and the separate pre-processing section for reaping was connected. In some cases, the frame can be lifted using a support cylinder when doing so. Furthermore, as shown in, for example, Japanese Utility Model Application Publication No. 56-114625,
By engaging the lifting cylinder that swings and lowers the connected pre-reaping section to the upper end of the frame of the separated pre-reaping section, the frame can be lifted up and down when the pre-reaping section is connected. There is something that can be done using a cylinder.

[The problem that the idea attempts to solve]

Conventionally, in the case of the former type using columns, two cylinders were used: a lifting cylinder for raising and lowering the reaping pre-processing section in a connected state, and a support cylinder for lifting the pre-processing section frame in a separated state. It was necessary.

The latter type, in which the lifting cylinder is used to lift the frame, requires a relatively large cylinder. This is because, in the case where the pre-reaping processing section swings up and down, the upper end of the pre-processing section frame must be adjusted so that the height of the pre-reaping processing section above the ground can be made as high as possible during non-operation such as turning the machine. The connection points to the machine are installed at the highest level possible. In this case, when the reaping pre-processing section is connected, the lifting cylinder acts on a low-level part of the reaping pre-processing section that is as far away from the swing axis as possible toward the free end, and the cylinder output acts effectively on the pre-processing section. If the preprocessing unit can be operated reliably even with a cylinder with a relatively small output, the lifting operation height of the preprocessing unit frame in the separated state will be reduced unless the extendable stroke of the cylinder is made relatively large. This will result in a shortage.

In short, both of the former means are economically disadvantageous due to the required number of cylinders or the size of the cylinders.

The object of the present invention is to modify the separated pre-harvesting sections so that they can be connected to each other advantageously from both operational and economical points of view.

[Means to solve the problem]

In order to achieve the objective, the present invention provides, in the combine harvester described at the beginning, a fluid pressure cylinder that swings and lowers the connected pre-reaping treatment section with respect to the main machine, so that the hydraulic cylinder can be freely separated from the pre-reaping treatment section. An engaging portion is provided at a location of the frame located at a lower level than a location where the frame is connected to the main machine. , a first engagement portion that allows the fluid pressure cylinder or the lift arm to push up the frame, and a first engagement portion that allows the fluid pressure cylinder or the lift arm to pull the frame toward the machine side. 2. A regulating member that includes a second engagement acting part in the engaging part, and fixes or restricts the swinging of the fluid pressure cylinder with respect to the machine to enable the fluid pressure cylinder to perform a lifting operation of the engaging part. can be freely switched between an activated state and a deactivated state. The functions and effects thereof are as follows.

[Effect]

The fluid pressure cylinder or the lift arm is engaged with the engaging portion, and the regulating member is brought into operation to operate the fluid pressure cylinder. Then, the fluid pressure cylinder or the lift arm acts on the engagement part due to the actions of the first and second engagement action parts and the actuation force of the cylinder to lift and operate the frame.

The fluid pressure cylinder or the lift arm acts on the low level portion of the frame, so that the fluid pressure cylinder acts on the free end side of the connected pre-reaping treatment section to raise and lower it, and
Even if the expansion and contraction stroke of the hydraulic cylinder is made relatively small, the frame can be lifted up by the cylinder to a high level relative to the cylinder stroke.

[Effect of idea]

When connecting the reaping pre-processing section, the frame is lifted with a hydraulic cylinder, making the work easier in terms of lifting the frame, and
It has become possible to use the cylinder for lifting and lowering the pre-processing section as a lifting cylinder at a low cost.

Furthermore, because of the arrangement of the engaging portions, the hydraulic cylinder can be made relatively light and compact both in terms of output and expansion/contraction stroke, and can be made at low cost in this respect as well.

〔Example〕

Next, examples will be shown.

As shown in FIG. 1, this machine is constructed by equipping a machine base with a crawler-type traveling device 7 with a threshing section 8, a shredding discharge section 9 for threshing waste straw, a driving section 10, a driving section 11, etc. As the vehicle travels, the planted grain culm is divided into objects to be reaped and objects not to be reaped by the weeding tool 12, and while the object to be reaped is raised by the device 13, it is reaped by the reaping device 14, and the reaped grain is removed. A reaping pre-processing section 1 configured to supply culms to the starting end of the threshing section 8 by a conveying device 15 is connected to the front part of the machine in a state where it can be oscillated up and down by a hydraulic cylinder 5, A combine harvester has been constructed.

To connect the preprocessing section 1 to the machine, as shown in Fig. 2, the left and right ends of the frame 2, which also serves as the transmission case of the preprocessing section 1, are attached to the left and right ends of the frame 3 of the machine. It is fitted into the upper end of a support column 16a or 16b that is vertically arranged in parallel with the support column 16a or 16b so as to be able to swing vertically. And the pillars 16a, 16b
The connecting boss portion 17 for each frame 2 is connected to a fixed side portion integrally formed on the support body and to the fixed side portion so as to be able to swing open and close so that the frame 2 can be attached and detached. It is formed into a two-part type consisting of a fixed side part and an opening/closing side part configured to be tightened and fixed with bolts in a connected state, and both boss parts 17, 17 are formed.
The frame 2 is configured to be able to be separated from the machine by opening the frame 2 and pulling the frame 2 forward from the fixed boss portion. Further, as shown in FIGS. 2 and 5, the cylinder 5 is connected to the reaping pretreatment section 1 through a connecting section 30 formed by fixing a bracket 20 to the frame 2.
The connecting portion 30 is connected to the cylinder 5 by inserting the roller 19 attached to the cylinder rod 5a via the support shaft 18 into the rearward notch of the bracket 20 and locking the cylinder rod 5a to the bracket 20. The cylinder 5 and the reaping pre-processing section 1 are connected to each other, and by moving the frame 2 forward, the roller 19 comes off the bracket 20 and the cylinder 5 and the reaping pre-processing section 1 are separated. There is.

As shown in FIGS. 3 and 4, the stand 21, which is permanently installed near the lower end of the frame 2, is moved from the retracted state in which the ground side is retracted above the weeding tool support rod 2a to the position where the grounding side is removed from the weeding tool. The support rod 2a is changed to the operating state in which it protrudes downward, the pre-reaping treatment section 1 is lowered to the state where the stand 21 is in contact with the ground, and both bosses 17 are opened, and the pre-reaping treatment is performed. Part 1 to the stand 21
By moving the machine backward while separating the frame 2 from the boss part 17 by swinging forward about the center, the preprocessing part input shaft 22 protruding from the frame 2 and the traveling transmission 23 are interlocked. By making it possible to move the frame 2 and the transmission 23 relative to each other by deforming the transmission belt 24, the reaping pretreatment section 1 can be moved forward from the machine, and inspections and repairs can be carried out between them. It is possible to create a work space for.

As shown in FIGS. 5 and 6, an engaging portion 25 for locking the cylinder 5 to the reaping pre-processing portion 1 which is placed separated from the machine is attached to the frame 2 by the bracket 20. Along with forming
The swing link 27 that restricts the swing of the cylinder 5 relative to the machine-side bracket 26 is provided so as to be switchable between an active state and a non-active state, so that when connecting the separated pre-reaping processing section 1, the cylinder Using 5 as a jack cylinder, attach the frame 2 to the support 16.
It is designed so that it can be lifted into a position connected to a and 16b.

That is, the engaging portion 25 is designed so that the lifting height of the frame 2 by the cylinder 5 is sufficient for the expansion and contraction stroke of the cylinder 5.
It is located at a lower level than the location for connecting to the boss portion 17 of the frame 2 and at the rear side of the connecting portion 30 . The engaging portion 25 is provided with a first engaging portion 25a and a second engaging portion 25b, and the first engaging portion 25a is brought into contact with the upper portion of the roller 18 so as to act as a cylinder. The cylinder 5 is configured to allow the frame 2 to be pushed up by the cylinder 5, and the second engagement acting portion 25b is configured to make it possible for the cylinder 5 to pull the frame 2 toward the machine by coming into contact with the rear part of the roller 18. There is.

By installing the swing link 27 across the support shaft 18 and the bracket 26, the cylinder swing is restricted so that the cylinder 5 does not swing downward relative to the machine, but swings upward, and the engagement by the cylinder 5 is controlled. Part 2
When the cylinder 5 is activated to enable the raising operation of the cylinder 5, and the connection with the support shaft 18 and the bracket 26 is released, the rocking restriction of the cylinder 5 is released and the cylinder 5 is operated to raise and lower the reaping pretreatment section 1. It is configured to be in a deactivated state to enable this.

In other words, when the cylinder 5 is engaged with the engaging portion 25 and the swing link 27 is activated to cause the cylinder 5 to extend, the first and second engaging portions 25a and 25b engage and swing. The movable link 27 swings upward for cylinder operation and causes the cylinder 5 to swing upward, so that the cylinder 5 exerts a pushing up action and a pulling action on the engaging portion 25, thereby imparting a lifting operation force to the frame 2. It is.

[Another example]

7 and 8 show alternative lifting structures, and in the case of the one shown in FIG. 7, the lift arm 28 is swingably connected to the machine, and the cylinder 5 is operated by the swinging operation. The free end side of the lift arm 28 is configured to be engaged with the engaging portion 25 by its first engaging portion 25a and second engaging portion 25b. There is. The lift arm 28 is connected to the cylinder 5 and the machine so as to restrict the swinging of the cylinder 5 so that it does not swing downward due to the lifting reaction force. The structure is such that the frame 2 can be lifted up via the engaging portion 25 by being swung upward.

In the case shown in FIG. 8, the cylinder 5 is locked to the engaging part 25, and the machine-side bracket 26 is secured to prevent the cylinder 5 from swinging due to the lifting reaction force of the reaping pre-processing part 1. A stopper 29 that is fixed to the frame 2 is releasably attached to the machine.
The cylinder 5 is configured to directly lift and operate the cylinder 5.

[Brief explanation of drawings]

The drawings show an embodiment of the combine harvester according to the present invention, in which Fig. 1 is an overall side view, Fig. 2 is a side view showing the connected state of the pre-harvesting processing section, and Fig. 3 shows the separated state of the pre-harvesting processing section. 4 is a side view, FIG. 4 is a plan view showing the separated state of the reaping pre-processing section, and FIG. 5 is a side view of FIG. 2.
6 is a side view showing how to lift the pre-reaping treatment section, and FIGS. 7 and 8 are side views showing another embodiment of the lifting structure. 1... Reaping pre-processing section, 2... Frame, 5...
Fluid pressure cylinder, 25...Engagement part, 25a...First engagement action part, 25b...Second engagement action part, 2
7, 28, 29...Regulation member, 28...Lift arm.

Claims (1)

[Scope of utility model registration request] A combine harvester in which a frame 2 of a reaping pretreatment section 1 is vertically swingably and separably connected to the main machine, and a fluid pressure for swinging and lowering the reaping preprocessing section 1 in the connected state with respect to the main machine. The cylinder 5 is separably connected to the reaping pre-processing section 1, and the engaging section 25 locks the hydraulic cylinder 5 or the lift arm 28 linked thereto in the separated state of the reaping pre-processing section 1. a first engagement portion 25a provided at a location on the frame 1 located at a lower level than the location where the frame 1 is connected to the main body, and which enables the fluid pressure cylinder 5 or the lift arm 28 to push up the frame 2; The frame 2 by the fluid pressure cylinder 5 or the lift arm 28
The engaging portion 25 is provided with a second engaging portion 25b that allows the device to be pulled toward the main unit, and
A regulating member (27 or 28 or 29) that fixes or restricts the swinging of the fluid pressure cylinder 5 with respect to the main body and enables the fluid pressure cylinder 5 to lift the engaging portion 25 is controlled in its operating state and its action. A combine harvester that can be freely switched to a released state.