JP2502374Y2 - Reciprocating cutting blade drive mechanism - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a double action mechanism for sliding both upper and lower blades in opposite directions in a reciprocating type cutting blade attached to a combine or a binder. Is.

(B) Prior Art A double-action reciprocating cutting blade mechanism has been conventionally known. For example, it is like the technique described in Japanese Utility Model Publication No. 52-159932.

(C) Problems to be Solved by the Invention In other prior arts, the structure is as shown in FIGS. 7 and 8 although it is not known.

That is, the left and right L-shaped crank arms are arranged at positions separated from each other, and the upper blade engagement arm and the lower blade engagement arm into which the crank pin is fitted at the tip of the crank arm are also separated from each other by the distance c. It was arranged.

Therefore, in the prior art, the mounting position of the cutting blade drive mechanism is regulated by the position where the weeding rod is projected forward.

Further, the crank links are also separated from each other, and the mowing drive unit cover provided for avoiding danger is also large.

In the present invention, since the left and right upper blade engaging arms 2 and the lower blade engaging arms 3 are vertically overlapped, both can be arranged close to each other, and the left and right crank arms 5 and 4 are also left and right cranks. The links 7 and 6 could also be placed close to each other in a narrow area.

As a result, since the cutting blade drive mechanism can be collectively arranged in a narrow space, the cutting blade drive link and the arm do not project into the grain culm transport passage, and there is no restriction on the flow of grain culms. It is a thing.

(D) Means for Solving the Problem The purpose of the present invention is as described above, and a configuration for achieving the purpose will be described below.

In the double action mechanism that slides the upper blade 11 and the lower blade 12 of the reciprocating cutting blade in opposite directions, the left crank is inserted into the engaging recess 2a at the rear end of the upper blade engaging arm 2 protruding rearward from the upper blade 11. The left crank pin 21 at one end of the arm 5 is loosely fitted, and the engaging recess 3a at the rear end of the lower blade engaging arm 3 protruding rearward from the lower blade 12
, The right crank pin 24 at one end of the right crank arm 4 is loosely fitted, and the right crank arm 4 is attached to the right crank arm pivot shaft.
23, the left crank arm 5 is pivotally supported on the left crank arm pivot shaft 20, the right crank arm 4 is L-shaped in a plan view, and the left crank arm 5 is an inverted L-shaped in a plan view and is symmetrical. The right crank arm 4 is pivotally connected to the other end of the right crank arm 4 to rotate the right crank arm 4, and the left crank arm 5 is pivotally connected to the left crank link 7 to the left crank arm 4. The arm 5 is rotated to set the L-shaped angle R of the L-shaped right crank arm 4 and the inverted L-shaped left crank arm 5 to 90 degrees or less, and the upper blade engaging arm 2 and the lower blade engaging member. The joint arm 3 can be moved up and down in the overlapping state.

(E) Embodiment The purpose and construction of the present invention are as described above. Next, the construction of the embodiment shown in the accompanying drawings will be described.

FIG. 1 is a plan view of a drive mechanism for a reciprocating cutting blade of the present invention provided as a combine harvesting device, FIG. 2 is an enlarged plan view of an essential part of the present invention, FIG. 3 is a side view of the same, and FIG. Is a side sectional view of the left crank arm 5, FIG. 5 is a side sectional view of the right crank arm 4, and FIG. 6 is a rear view of the left and right crank arm pivot shafts 20 and 23.

FIG. 1 illustrates a mowing mechanism arranged at the front end of a combine for cutting five rows.

A moving device 15 having a tine having a tip turning locus 16
A double-action double-edged cutting blade for 5 rows is provided on the lower side of the.

The drive parts of the long cutting blades are centrally arranged on the left side in the traveling direction.

The cutting blade drive mission 17 is provided in a part of the cutting drive frame, and the end portion of the cutting blade drive shaft is projected to the left and right of the cutting blade drive mission 17. Crank levers 14 and 13 are fixed to the left and right ends of the cutting blade drive shaft.

Left and right crank links 7 and 6 are connected to the ends of the crank levers 14 and 13, and the tips of the left and right crank links 7 and 6 are pivotally supported on the mowing frame 8. It is pivotally connected to the other end of 4.

Further, an upper blade 11 and a lower blade 12 are supported by a cutting blade holder on a cutting blade frame 9 arranged in the front part of the cutting frame 8 and can be slid left and right.

The upper blade engaging arm 2 projects rearward from the upper blade 11, and the lower blade engaging arm 3 projects rearward from the lower blade 12.

In the present invention, the upper blade engaging arm 2 and the lower blade engaging arm 3 are vertically arranged in an overlapping manner.

The left crank pin 21 of the left crank arm 5 is fitted into the engaging recess 2a of the upper blade engaging arm 2 and the lower blade engaging arm 3
The right crank pin 24 of the right crank arm 4 is fitted in the engaging recess 3a.

Then, as shown in FIG. 2, in this configuration, the angle R of the L-shaped left and right crank arms 5, 4 is 90 degrees.
The upper blade engaging arm 2 and the lower blade engaging arm 3 are arranged so as to overlap each other, and the left and right crank pins 21, 2 are arranged.
The four parts are configured so that they do not collide with each other.

The specific structure of the L-shaped right and left crank arms 5 and 4 will be described with reference to FIGS. 4, 5 and 6.

The L-shaped right crank arm 4 pivotally supported on the right crank arm pivot shaft 23 and the inverted L-shaped left crank arm 5 pivotally supported on the left crank arm pivot shaft 20 are arranged symmetrically to each other. A right crank link 6 is pivotally connected to the other end of the left crank arm 5, and a left crank link 7 is pivotally connected to the other end of the left crank arm 5 to connect the L-shaped right crank arm 4 and the inverted L-shaped left crank arm 5 to each other. , The angle R of the L type is 90 degrees or less.

Further, the left crank arm 5 is a left crank arm pivot shaft.
It is pivoted on a pivot body 1 fixed on the cutting frame 8 by 20.

The front end of the right crank link 6 is pivotally connected to the rear end of the left crank arm 5 by a ball joint.
A left crank pin 21 is provided at the front end of the left crank arm 5, and a left bearing 22 loosely fitted in the left crank pin 21 is fitted in the engaging recess 2 a of the upper blade engaging arm 2.

The L-shaped right crank arm 4 is pivotally supported by the pivot body 1 at the right crank arm pivot shaft 23, and the left crank link 7 is pivotally connected to the rear end by a ball joint, and the right crank arm at the front end. A right bearing 25 is loosely fitted in the pin 24, and the right bearing 25 is fitted in the engaging recess 3 a of the lower blade engaging arm 3.

Then, as shown in FIG. 3, the upper blade engaging arm 2
And the lower blade engaging arm 3 are arranged at vertically overlapping positions, and the lower end of the portion of the left bearing 22 fitted in the engaging concave portion 2a of the upper blade engaging arm 2 has an upper blade engaging arm. It projects between the arm 2 and the lower blade engaging arm 3 in a space b in FIG.

Although the upper blade engaging arm 2 and the upper portion of the right crank pin 24 are in a position where they interfere with each other in a side view, the upper blade engaging arm 2 and the lower blade engaging arm 3 are in a rear view. The upper blade 11 and the lower blade 12
Since there is a margin for the slide stroke of, there is no interference.

(F) Effect of the Invention Since the present invention is configured as described above, it has the following effects.

First, left and right inverted L-shaped and L-shaped crank arms
Since 5 and 4 are symmetrically arranged as an inverted L-shape and an L-shape, they can be arranged laterally close to each other as shown by a distance a in FIG. Left and right crank arms
Since 5,4, the upper blade engaging arm 2 and the lower blade engaging arm 3 can also be arranged centrally in one place, a part of the cutting blade drive mechanism is projected to the conveying part of the grain stem to convey. It no longer interferes with the flow due to contact with the grain culm plant inside.

Second, the left crank arm 5 of the inverted L-shape and the right crank arm 4 of the L-shape are connected to the other ends of the left crank link 7 and the right crank link 6, respectively, and the cranks are rotated separately. Since the driving force is transmitted to the crank arms, it is not necessary to drive the crank arms by connecting them to each other with pins, so that the entanglement of the links and the arms is reduced.

Thirdly, when the upper blade engaging arm 2 and the lower blade engaging arm 3 are arranged separately from each other on the left and right, it is necessary to consider the position of the base of the weeding rod 30 protruding for each line. , L-shaped right crank arm 4 and inverted L-shaped left crank arm 5
By setting the angle R of the L shape to 90 degrees or less, the upper blade engaging arm 2 and the lower blade engaging arm 3 can be arranged close to each other. The drive mechanism of the double-action cutting blade can be collectively arranged within the space between the rows.

[Brief description of drawings]

FIG. 1 is a plan view of a drive mechanism for a reciprocating cutting blade of the present invention provided as a combine harvesting device, FIG. 2 is an enlarged plan view of an essential part of the present invention, FIG. 3 is a side view of the same, and FIG. Is a side sectional view of the left crank arm 5, FIG. 5 is a side sectional view of the right crank arm 4, FIG. 6 is a rear view of the left and right crank arm pivot shafts 20, 23, FIG. Is a plan view showing a drive mechanism of a conventional double action cutting blade, and FIG. 8 is a side view of the same. 2 ... Upper blade engaging arm 3 ... Lower blade engaging arm 4 ... L-shaped right crank arm 5 ... Reverse L-shaped left crank arm 5 6 ... Right crank link 7 ... Left crank link 8 …… Mowing frame 9 …… Cutting blade frame 21 …… Left crank pin 24 …… Right crank pin

Claims (1)

(57) [Scope of utility model registration request] 1. A double-action mechanism for sliding an upper blade 11 and a lower blade 12 of a reciprocating cutting blade in opposite directions, wherein an engaging recess at a rear end of an upper blade engaging arm 2 protruding rearward from the upper blade 11. 2a,
The left crank pin 21 at one end of the left crank arm 5 is loosely fitted, and the right crank pin at one end of the right crank arm 4 is fitted into the engaging recess 3a at the rear end of the lower blade engaging arm 3 protruding rearward from the lower blade 12. 24 is loosely fitted, the right crank arm 4 is pivotally supported on the right crank arm pivot shaft 23, the left crank arm 5 is pivotally supported on the left crank arm pivot shaft 20, and the right crank arm 4 is L in plan view. And the left crank arm 5 is symmetrically arranged as an inverted L shape in a plan view, and the other end of the right crank arm 4 is pivotally connected to the right crank link 6 to rotate the right crank arm 4 to rotate the left crank arm 4. A left crank link 7 is pivotally connected to the other end of the arm 5 to rotate the left crank arm 5, and an L-shaped right crank arm 4 and an inverted L-shaped left crank arm 5 are provided.
The L-type angle R is 90 degrees or less, and the upper blade engaging arm 2 and the lower blade engaging arm 3 can be moved left and right in a vertically overlapping state. .