JPH03112409A - Cutting blade apparatus of combine or the like - Google Patents

Abstract

PURPOSE:To suppress the noise and abrasion and keep the accuracy of the subject apparatus over a long period by providing a pair of swing arms reciprocatively rotating around two rotary shafts to reciprocatively swing an upper and a lower cutting blades in directions opposite to each other and axially connecting the swing arms with a link metal in a manner to allow only the rotational motion. CONSTITUTION:When a swing arm 5 is reciprocatively rotated around a rotary shaft 1, the other swing arm 6 axially connected to the swing arm 5 with a link metal 7 is reciprocatively rotated around a rotary shaft 2. The lower blade 3 and the upper blade 4 arranged in the form of a hair-clipper are reciprocatively oscillated in directions opposite to each other by the reciprocating rotary motion of the swing arms 5, 6. The swing arms 5, 6 are axially connected with each other with the link metal 7 in a manner to allow only the rotational motion. The mechanism is effective in suppressing the generation of noise, decreasing the abrasion and keeping the accuracy over a long period.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a cutting blade device such as a combine harvester.
Can be used for combiners and binders.

(Prior art and problem to be solved by the invention) A pair of swinging arms that reciprocate around a rotation axis reciprocate the lower and upper blades of the clipper-shaped cutting blade in opposite directions. In a cutting blade device such as a combine harvester having a structure of This may cause noise when rotating,
Furthermore, it is prone to wear and it is difficult to maintain stable performance over a long period of time.

Therefore, the present invention aims to solve the above-mentioned problems and maintain stable accuracy and performance over a long period of time with little noise.

(Means for Solving the Problems) This invention provides a pair of lower blades 3 and upper blades 4 of clipper-shaped cutting blades that reciprocate around rotation shafts 1 and 2 and reciprocate in opposite directions. A cutting blade device such as a combine harvester is configured such that a link metal 7 connects the swinging arms 5 and 6 with a shaft that only allows rotation.

(Operations and Effects of the Invention) When one swing arm 5 is reciprocated around the rotation shaft 1, the other swing arm 6, which is axially connected to this swing arm 5 by a link metal 7, It is rotated back and forth around two rotation axes.

By reciprocating the pair of swinging arms 5.degree.6, the lower blade 3 and upper blade 4 of the clipper-shaped cutting blade reciprocate in opposite directions.

Since the pair of swinging arms 5 and 6 are connected by a link metal axle that only allows rotation, and the structure is not an interlocking connection between an elongated hole and a pin shaft as in the prior art, there is less noise generation. , there is less wear, accuracy can be maintained over a long period of time, and performance can be stabilized.

In addition, by connecting the pair of swinging arms 5 and 6 with the link metal 7, the phases of the lower blade 3 and the upper blade 4 can be matched, which eliminates the need for adjustment for this phase matching, and only one assembly is required. can be facilitated.

(Example) In the rotation, the reaping device 8 is provided with a gear case 10 in a T-shape in the left-right direction at the lower end of the reaping frame 9, and a reaping frame 11 provided on the lower side of the gear case 10. A plurality of weeding rods 13 for weeding the culm are provided on the front frame 12 of the frame 11 so as to protrude forward.

A mounting plate 14 protruding forward is provided at the mounting position of the grass dividing rod 13 on the front frame 12, and an L-shaped cutting blade stand 15 is mounted on this mounting plate 14 between the left and right outer grass dividing rods 13. A clipper-shaped cutting blade is mounted on the cutting blade stand 15.

The clipper-shaped cutting blade has a structure in which a lower blade 3 and an upper blade 4 are slidably overlapped with each other. In this shape, a lower head 16 is integrally provided on the lower side of the lower side bar and projects rearward. The upper blade 4 has a shape in which a plurality of chevron-shaped cutting blades are fixed to the lower surface of the upper cutting blade bar with rivets and arranged in series, and an upper cutting blade head 17 is made to protrude rearward from the upper side of the upper cutting blade bar. It is integrated. The lower side head 16 is curved upward so that its rear end is at the same height as the upper cutting blade head 17. The lower side head 16 and the upper cutting blade head 17 are arranged side by side on the left and right sides of the lower blade 3 and the upper blade 4. A plurality of blade holders 18 are provided at appropriate intervals so as to press the lower blade 3 and the upper blade 4 into slidable contact with each other.

Support plates 20 are provided on the left and right sides of the reaping frame 11 at the rear of the front frame 12, extending between the front frame 12 and the member 19 in the front-rear direction of the reaping frame 11.

The support plate 20 is provided with a pair of swing arms 5 and 6 that are rotatable around the rotation axis of the support plate 20 at 1°2.

A roller 21 is rotatably provided at the lower end of the swinging arm 6, which is provided closer to the member 19 side in the longitudinal direction of the reaping frame 11, of the pair of swinging arms 5 and 6.
is rotatably fitted into the notch of the upper cutting blade head 17. A roller 22 is rotatably provided at the lower end of the swing arm 5 which is arranged side by side with the swing arm 6, and the roller 22 is rotatably fitted into a notch in the lower head 16. .

Between these pair of swinging arms 5, 6, arms 5a, 6a are provided to protrude from these swinging arms 5, 6, respectively, and shafts 5b, 6b are provided at the tips of these arms 5a, 6a.
has been established. These arms 5a and 6a are arranged in parallel in the front-rear direction and form the shaft 5b.

A link metal 7 rotatably fitted into the arm 6b provides a shaft connection that allows only rotation between the pair of swing arms 5 and 6.

An opening 23 for removing mud is provided in the support plate 20 below the link metal 7.

A drive arm 24 at the lower part of the gear case 10, which receives power from a transmission shaft inside the reaping frame 9, is interlocked with the rear end of one of the swing arms 6 through a drive rod 25, and the drive arm 7
Due to the rotation of 24, the pair of swinging arms 5 and 6 reciprocate around the rotation axis 1.2 via the link metal 7, and the lower blade 3 and the upper blade are rotated by the pair of swinging arms 5 and 6. 4 are interlocked so that they swing back and forth in opposite directions.

This drive rod 25 is provided facing in the right and left reaping width direction, and the drive arm 24 that drives the drive rod 25 is located rearward of the line of the conveyor chino 26 that collects and collects the harvested husk to the threshing section. The drive rod 25 is provided at a rear position substantially parallel to the conveyor chino 26.

When the drive arm 24 is transmitted and rotated, the drive rod 25 is interlocked to cause one of the swing arms 6 to reciprocate around the rotation shaft 2, and the roller 21 at the front end passes the upper stripping head 17 to the upper end. The blade 4 swings back and forth left and right.

This reciprocating rotation of the swing arm 6 causes the other swing arm 5 to reciprocate around the rotation axis 1 via the link metal 7, and the lower blade 3 is moved by the roller 22 at the front end through the lower row blade head 16. are interlocked with respect to the upper blade 4 so as to swing back and forth in left and right opposite directions.

The link metal 7 is rotatably fitted to the pins 5b and 6b of the pair of swinging arms 5 and 6 to form an axial connection between the pair of swinging arms 5 and 6, which allows only rotation, so that the two swinging arms 5 and 6 can rotate reciprocatingly. There is no play during movement, and the cutting blade can be swung precisely and smoothly.

Furthermore, by connecting the pair of swinging arms 5.6 with the link metal 7, the phase of the upper blade 4 and lower blade 3 can be determined, eliminating the need for adjustment.

Stable performance can be maintained over a long period of time.

In addition, since the drive rod 25 for reciprocating the pair of swinging arms 5 and 6 is positioned rearward from the line of the conveyor cheno 26, weeds, straw debris, etc. conveyed by the conveyor chino 26 do not accumulate. There is no.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view, FIG. 2 is an enlarged side sectional view of a portion thereof, and FIG. 3 is a side view. In the figure, numerals 1 and 2 are rotation axes, 3 is a lower blade, 4 is an upper blade, 5,
6 indicates a swing arm, and 7 indicates a link metal.

Claims (1)

[Claims] A link metal 7 is connected between a pair of swinging arms 5 and 6 that reciprocate around the rotation shafts 1 and 2 to swing the lower blade 3 and upper blade 4 of the clipper-shaped cutting blade back and forth in opposite directions. A cutting blade device such as a combine harvester that has a shaft connection that only allows rotation.