JPH0536335Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a reaping section elevating device for a combine harvester that is capable of raising and lowering the reaping section in front of the threshing section.

[Prior Art] Conventionally, in a combine harvester in which a reaping section that can be raised and lowered while rotating around a rear rotation fulcrum is connected in front of a threshing section, the reaping section has a structure in which the reaping section is raised and lowered by a hydraulic cylinder. I was getting used to it.

[Problems to be solved by the invention] Therefore, the hydraulic cylinder and its related hydraulic drive device have a complicated structure and are expensive, and furthermore, they require space to install and have a large aircraft capacity. The problem was that it became heavier.

[Means for solving the problem] The present invention solves such problems and has a simple structure that allows the reaping section to be raised and lowered smoothly. A motor for rotating the drive link is mounted on the front part, and the base of the connecting link is rotatably connected to the frame of the reaping part located above the front side of the motor.
The lower end of a tension spring suspended above the connecting pin, which rotatably connects the tips of the driving link and the connecting link, is connected to the connecting pin.

[Operation] Therefore, when the drive link is rotated by the motor, the drive link and the connecting link are bent or in the same direction, and the reaping section is rotated about the rotation fulcrum. This means that it can be raised and lowered, and in that state, the connecting point of both links is pressed upward by the tension spring, which buffers the load and shock of the reaping section and supports it with favorable load conditions. become.

[Example] Next, the embodiment shown in the drawings will be described.

FIG. 2 shows a side view of a small combine harvester, in which a threshing section B is mounted on a chassis 1 supported by both crawlers 8, and a reaping section A connected to the front of the threshing section B is connected to a double-drawing case 9. , cutting blade 10, both raking wheels 1
1. It has a structure in which a lower conveyor 12 and an upper conveyor 13 are provided, so that the input transmission case 14, which is the rear part of the reaping section A, can be rotated about the rotation fulcrum O to a position in front of the threshing section B. A control column 15 and a seat 1 are pivotally connected and are installed at the front and back of the lateral side of the reaping section A.
A side column 17 is installed on the inner side of the column 6, and the structure is similar to that of the conventional structure.

A forward/reverse motor 3 that can be operated from the seat 16 side is mounted on the upper front part of the chassis 1, which is the front lower part of the threshing section B. A drive link 2 driven by the drive link 2 extends forward so as to rotate in the vertical direction, and is installed so that it can abut against a stopper 18 below when the drive link 2 is in a horizontal position.

Further, a support piece 19 is provided protruding from the middle part of the frame part 4 which is located in front of the motor 3 and serves as a reaping transmission pipe, and the base side boss 5b of the connecting link 5 can be freely rotated on the support piece 19. The distal end boss 2a of the driving link 2 and the distal end boss 5a of the connecting link 5 are pivotally connected.
A connecting pin 6 is rotatably inserted into the side column 17, and a stopper 20 is provided protruding from the boss 5a so as to abut against the lower surface of the distal end side of the drive link 2 when both links 2 and 5 are in the same direction. The balance tension spring 7 has an upper end connected to a pin 21 projecting from the upper part of the inner surface of the balance tension spring 7, and the lower end of the balance tension spring 7 is connected to the connecting pin 6.

Therefore, when the drive link 2 is rotated downward by the motor 3 under the tension of the tension spring 7, both links 2 and 5 are bent and weight is added as well, as shown in FIGS. 1 and 2. As a result, the reaping section A rotates around the rotational fulcrum O and descends.

Furthermore, when the drive link 2 is rotated upward by the motor 3, the reaping section A can be raised while increasing the bending angle of both links 2 and 5 and pushing up, as shown in FIG. When the stopper 20 abuts against the lower surface of the distal end side of the drive link 2 and both links 2 and 5 move in the same direction, the reaping section A can be raised to the upper limit position.

With the reaping section A moving up and down in this manner, the connection point between the links 2 and 5 is pressed upward by the tension spring 7, and as a result, the load and shock of the reaping section A can be buffered. This is effective when raising the reaping part A to the upper limit to cross over a ridge or when driving on the road.

[Effects of the invention] As described above, the present invention enables the reaping section A to be moved up and down favorably by the drive link 2 rotated by the motor 3 via the connection link 5, By elastically biasing the connection point with the link 5 upward by the tension spring 7, the load and shock of the reaping section A can be buffered, and the reaping section A can be favorably supported by making the load conditions favorable. Compared to conventional hydraulic systems, this system has the advantage of being able to have a simpler structure at a lower cost, and can be easily installed on an aircraft, and can be suitably implemented.

[Brief explanation of the drawing]

Figure 1 is a side view of the main parts of an embodiment of the present invention;
2 is a side view of the combine harvester, FIG. 3 is an explanatory view of the operation of FIG. 1, and FIG. 4 is a top view of a portion of FIG. 3. O... Rotation fulcrum, A... Reaping section, B... Threshing section, 1... Chassis, 2... Drive link, 3...
Motor, 4... Frame, 5... Connecting link, 6...
Connecting pin, 7... tension spring.

Claims (1)

[Scope of utility model registration request] In a combine in which a reaping section A that can be raised and lowered while rotating around a rear pivot point O is connected in front of a threshing section B, a driving link is provided at the front of the chassis 1 on which the threshing section B is mounted. The base of a connecting link 5 is rotatably connected to the frame portion 4 of the reaping section A which is above the front side of the motor 3, and the driving link 2 and the connecting link 5 are A reaping section elevating device characterized in that the lower end of a tension spring 7 suspended above the connecting pin 6 is connected to the lower end of a tension spring 7 suspended above the connecting pin 6.