JPS5828495Y2 - Reciprocating blade drive device - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a drive device for a reciprocating cutting blade.

Conventional reciprocating blade devices reciprocate only the upper blade,
Since the lower blade is fixed to the reaping frame, the reciprocating stroke of the upper blade is large, which causes considerable vibration and noise in the reaping section, making it difficult to perform the reaping operation smoothly.

The purpose of this invention is to solve these problems with conventional devices.The lower blade drive part is installed on the opposite side of the upper blade to the passive part installation side, and also A passive part is installed in the lower blade of the part where the lower blade is to be removed, and the passive part of the lower blade and the driving part of the upper blade are interlocked through repeated strikes so that the lower blade reciprocates in the opposite direction with respect to the upper blade. By connecting the upper and lower blades of the clipper type to the opposite side at the same time and alternately, this cancels out the vibrations caused by the turbulence of both blades, making it quiet and well-balanced, and with less strokes for each. The present invention provides a mowing machine that can be driven to reduce losses, has a simple structure, and can perform reaping work with good cutting quality.

Next, the embodiment shown in the drawings will be described.

FIG. 1 shows a plan view of a part of the reaping section of a combine harvester, etc., in which triangular blades are arranged in parallel on the front surface of a lower knife par 1a to provide a clipper-shaped lower blade 1, and the front surface of a knife par 2a is similarly provided. Triangular blade bodies are arranged side by side to provide a clipper-shaped upper blade 2, and the upper blade 2 has the same horizontal length and is overlapped above the lower blade 1, so that a plurality of cuttings extending in the front and back direction of the machine are created. It is supported by a plurality of knife holders 9 across the frame 8 in the lateral direction, and the upper blade 2 and the lower blade 1 are configured to reciprocate, respectively, so that the culm and the like can be harvested by both.

Further, a passive part 3 made of a plate-shaped body is provided protrudingly behind the knife par 2a at the lateral end portion of the upper blade 2, and a support shaft part 1 is provided above the support plate 10 horizontally installed astride the reaping frame 8.
1, a bell crank type interlocking body 4 is rotatably supported on the support shaft 11, and both ends of an interlocking rod 12 are connected to the tip of a part of the arm of the interlocking body 4 and the passive part 3, respectively. They were rotatably connected via pins 13 and 14, and a connecting body 15 was rotatably connected to the tip of the other arm of the interlocking body 4 through a pin 16. The drive rod 17 extends rearward perpendicularly to the two blades, and a rear end connecting portion 17a of the drive rod 11 is attached to a side surface around the rotating body 19 that is rotationally driven by the horizontal rotation shaft 18.
are connected freely to rotate.

A lower blade drive part 5 made of a plate-shaped body is protruded from behind the knife par 2a on the other end side opposite to the side where the passive part 3 is installed of the upper blade 2, and the lower blade 1 of the lower part is provided. At the rear of the knife par 1a, there is a passive part 6 formed of a plate-shaped body.
A bifurcated engaging portion 6a is provided at the rear end of the passive portion 6.
A horizontal elongated hole 20 is formed at an intermediate position, and the support plate 10
An upright support shaft 21 is passed through the elongated hole 20 and extended upward, and the center part of the connecting rod 7 is rotatably supported on the support shaft 21, and one end of the connecting rod 7 is connected to the above-mentioned. A pin and play hole 22 in the lower blade drive part 5
A circular operating body 23 formed at the rear tip of the connecting rod 1 is fitted into the two-pronged engaging portion 6a.

During reaping work, as the rotating body 19 rotates as shown by the arrow A, the drive rod 17 reciprocates as shown by the arrow, and as shown by the solid line and the imaginary line in FIG. When the interlocking body 4 reciprocates around the support shaft part 11, the passive part 3 reciprocates via the interlocking rod 12, the upper blade 2 reciprocates, and at the same time, the lower blade drive part 5 reciprocates. Therefore, the connecting rod T rotates reciprocatingly, causing the driven part 6 to reciprocate by the actuating body 23, but the lower blade 1 also reciprocates in the opposite direction to the upper blade 2 together with the driven part 6. , the lower blade 1 and the upper blade 2 alternately reciprocate in opposite directions for reaping.

In other words, since the double blades 1 and 2 reciprocate, the stroke of each blade is small compared to a clipper-type cutting blade in which only one reciprocates, and the parts that drive the double blades 1 and 2 are on opposite sides, so the double blades It has more degrees of freedom, less vibration and noise, and can be driven with less mechanical loss.

In this way, the present invention is designed to reciprocate the passive part 3 installed at the side-to-side end portion of the upper blade 2 superimposed above the clipper-shaped lower blade 1 by the interlocking body 4 such as a bell crank on the transmission side. In the interlocking reciprocating type cutting blade drive device, a lower blade drive unit 5 is installed at a portion of the upper blade near the other end of the passive portion installation side, and the lower blade is located at a portion corresponding to the lower blade drive unit 5. 1 is equipped with a passive part 6, and the passive part 6 and the driving part 5
A connecting rod 7 is provided which is interlocked so that the lower blade 1 follows the upper blade 2 on the opposite side, so that the upper blade 2 and the lower blade 1 can be simultaneously and alternately reciprocated to the opposite side. Therefore, the reciprocating movement of the upper blade 2 and lower blade 1 allows for smooth cutting, and since the parts that drive both blades are on opposite sides, the degree of freedom of both blades is increased, and there is a good balance with less vibration and noise. In addition, mechanical loss is reduced, the stroke of both blades can be reduced, and the upper blade 2 can be suitably implemented with a simple structure that also serves as a pitman.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view of the main parts of the reaping section, FIG. 2 is a plan view of the lower blade, and FIG. 3 is an explanatory view of the operation of FIG. 1. 1...Lower blade, 2...Upper blade, 3...
... Passive part, 4... Interlocking body, 5... Drive part, 6... Passive part, γ... Linkage.

Claims (1)

[Scope of utility model registration request] Reciprocating type mowing in which a passive part 3 installed at the lateral end of the upper blade 2 superimposed above the clipper type lower blade 1 is interlocked so as to be reciprocally driven by an interlocking body 4 such as a bell crank on the transmission side. In the blade driving device, a lower blade driving part 5 is installed at a part of the upper blade near the other end of the driven part installation side, and a passive part 6 is installed on the lower blade 1 at a part corresponding to the lower blade driving part 5. A connecting rod 7 is provided which interlocks the driven part 6 and the driving part 5 so that the lower blade 1 follows the upper blade 2 on the opposite side, and the upper blade 2 and the lower blade can be operated at the same time. A reciprocating mower blade drive device characterized in that it is configured to be able to reciprocate alternately in opposite directions.