JPH0633773Y2 - Blade stand for cutting blade device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a cutting blade device in a pretreatment section of a combine, and more particularly to a receiving table of the cutting blade device.

<Prior Art> Generally, in a combine cutting device, when the upper blade and the lower blade slide left and right mutually to perform a cutting operation, the cutting blade driving device is engaged to transmit a driving force to the cutting blade. It is necessary to attach the knife head to the lower blade.

In a conventional blade-reverse-sliding drive type cutting blade device, since the lower blade is covered on both upper and lower sides by the upper blade and the blade holder, the knife head cannot be attached to the upper or lower surface of the lower blade knife bar. The knife head was integrally formed with the knife bar for the lower blade and attached to the back side of the lower blade.

<Problems to be solved by the invention> However, in the conventional configuration, since the knife head is integrally formed so as to project to the rear end of the knife bar,
The knife bar has a complicated shape, and the processing steps are complicated, which requires many steps, resulting in high cost.

Further, the upper blade knife bar and the lower blade knife bar, which have different shapes, must be manufactured separately from each other, resulting in poor manufacturing efficiency and high cost.

<Means for Solving the Problems> A lower blade 19 and an upper blade 17, which are slidably superposed on each other, are held on the tip of a blade holder 15 attached to the frame side,
Attached to the lower surface side of the lower blade 19 and the upper surface side of the upper blade 17 are the tip portions of the knife heads 39 and 37, respectively.
In the mechanism for slidingly driving the lower blade 19 and the upper blade 17 in opposite directions by the cutting blade drive device via the knife head 39 at a position corresponding to the knife head 39 of the blade holder 15 in a state where the knife head 39 can be moved left and right. Forming a notch portion 15a for accommodating, at the adjacent ends of the knife heads 39, 37, the side end portion of the knife head 37 on the upper blade 17 side is overlapped with the knife head 39 on the lower blade 19 side in plan view, and the notch portion is formed. It is characterized in that it is configured to cover the portion 15a.

<Operation> The upper blade 17 and the lower blade 19 held on the receiving table 15 are slid in opposite directions by the cutting blade drive device via the knife heads 37 and 39 attached to them. Blade 15
A notch 15a is provided in the notch 15a, and the knife head 39 attached to the lower surface of the lower blade 19 is accommodated in the notch 15a. The knife head 39 moves left and right in the notch 15a to drive the lower blade 19.

At this time, the side edge of the upper blade side knife head 37 overlaps with the side edge of the adjacent lower blade side knife head 39 and covers the notch 15a, so that it is possible to prevent biting of straw waste and the like Even if a sheet is inserted, it is removed below the cutout portion 15a.

<Embodiment> An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 7 is a side view of a pretreatment section of a combine in which the apparatus of the present invention is implemented. The section 3 is provided so as to be swingable up and down, and a plurality of dividers 7 are attached to the pretreatment frame 5 at the lower front end of the pretreatment section 3, and a plurality of moving cases are provided from the rear of the divider 7. 9
Is obliquely installed.

At the rear of the lower end of the moving case 9, a reaping device 11 is attached to the pretreatment frame 5 and provided in the left-right direction.

As shown in FIGS. 1 and 2, the reaping device 11 is provided with a plurality of collars 13 projecting downward from a plurality of pretreatment frames 5 and a plurality of collars 13 so as to project forward from the end faces of the collars 13. It is supported by the pretreatment frame 5 with the plate-shaped blade holder 15 attached over the entire width, and the upper blade 17 is mounted on the blade holder 15.
The lower blade 19 and the lower blade 19 are placed one above the other in a vertically movable manner.

Both the upper blade 17 and the lower blade 19 are integrally fixed to the lower surface or the upper surface of one of the upper and lower knife bars 21, 23 by fixing tools 20 such as flat head bolts or rivets so that a large number of blades are arranged in a straight line. , The shape configuration is almost the same, double-edged 17,1
9 is a blade holder 1 that is superposed with the sliding surfaces on the blade side facing each other.
Placed on 5.

As a result of the upper blade 17 and the lower blade 19 having the same shape in this way, blades of the same weight slide in the left and right directions, so that the vibrations of the upper and lower blades cancel each other out and the vibrations decrease. Upper blade 17 and lower blade
By moving 19 by 1 pitch, it moves by 2 pitches relatively, so the cutting efficiency doubles,
If the cutting efficiency is the same as the conventional one, the moving pitch of the blade is
Since it can be reduced to 1/2, vibration can be further reduced, and the mechanism can be made compact by halving the arm length of the crank to be described later.

Further, since the upper blade 17 and the lower blade 19 can be made substantially the same, it is not necessary to separately manufacture the upper and lower blades, so that the manufacturing efficiency is good and the assembly can be facilitated.

As a result of adjusting the shape of the upper blade 17 by making the lower blade 19 lighter than the conventional one as described above, in order to prevent the cutting blades 17 and 19 from bending,
The blade holder 15 is rigidly formed so that the blade holder 15 has sufficient strength.

A straight lower blade guide 25, which is formed thicker than the lower knife bar 23, is fixed on the front end of the blade holder 15 over the entire length by a fixing tool 26 such as a flat head bolt. In addition to preventing dirt and straw from entering the
The bottom surface is in sliding contact.

As shown in FIG. 3, clips 27, which are curved in a U shape at predetermined intervals, are fixed to the blade holder 15 in the front-rear direction by fasteners 28 such as bolts. A blade retainer 29 is fixed to the front end of the upper inner surface of the clip 27, the upper surface of the upper blade 17 is in sliding contact with the lower surface of the clip 27, and the lower blade guide 25 holds the upper and lower blades 17 and 19 slidably.

The rear surface of the lower knife bar 23 is in sliding contact with the lower front end 31 of the clip 27, and the lower knife bar 23 is slidably held together with the lower blade guide 25 to regulate the forward and backward movement of the lower blade 19.
Furthermore, in the clip 27, behind the upper and lower blades 17, 19,
The friction plate 33 is fixed by a fastener 34 such as a bolt via a collar 35, and the front end surface of the friction plate 33 is in sliding contact with the rear surface of the upper knife bar 21 to regulate the forward and backward movement of the upper blade 17. The collar 35 has a sufficient thickness so that the lower surface of the friction plate 33 does not come into contact with the upper blade 17. Further, an adjusting liner 36 for adjusting the height of the clip lower front end portion 31 is also inserted between the clip 27 and the blade rest 15.

As shown in FIGS. 1, 4, and 5, upper blade 17 and lower blade
The front ends of plate-shaped knife heads 37, 39 are fixed to 19 via knife bars 21, 23. Here, the receiving table 15 is provided with a notch 15a for attaching the knife head 39 to the lower blade 19 from below, and its width is sufficient to allow the knife head 39 to move laterally. There is. The knife head 39 has a lower blade 19 for avoiding interference with the receiving table 15.
39a that bends upward in the shape of a crank behind the attachment part to
Is formed, and accordingly, the knife head 37 attached to the upper blade 17 is also formed with a similar step portion 37a to avoid interference with the knife head 39.

At the rear end of each knife head 37, 39, a crank 4
Knife side accommodating portions 37b and 39b, which are U-shaped notches for accommodating the knife side engaging portions 40 and 42 of 9,51, are formed, respectively. Sliding contact surfaces 37c, 39c, which are provided so as to project upward, are formed parallel to the front-rear direction on the left and right inner side surfaces of the accommodating portions 37b, 39b.

Knife side engaging portions 40, 42 which engage with the knife side accommodating portions 37b, 39b, respectively, are crankshafts 53, 55 projectingly provided on the pretreatment unit side.
Cranks 49 and 51, which are rotatably supported by, are provided at the tip of the knife side, and pins 41 and 45 protruding from the tip of the knife, and rotatably fitted to the pins 41 and 45. And cylindrical rollers 43 and 47. Laura 43,47
On the peripheral surface of, parallel planes are formed at opposing positions,
The above-mentioned accommodating portions 37b, 39b are slidably fitted, and the planes are in sliding contact with the sliding contact surfaces 37c, 39c. In such a configuration, the engaging portions 40, 42 are moved left and right in an arc shape as the cranks 49, 51 swing, and slide in the front-rear direction while moving the knife heads 37, 39 left and right. At this time, the engaging portions 40, 42 and the housing portion 3
Since 7b and 39b are in surface contact with each other, the contact pressure is dispersed and the occurrence of rattling due to wear or the like is reduced.

As shown in FIGS. 1 and 6, the cranks 49, 51 are shaped like bell cranks bent left and right at the shaft support parts 49a, 51a, and the cranks 49, 51 are located at the midpoints of the shaft support parts 49a, 51a. It is formed so as to overlap. One crank 49 crank
As with the knife side engaging portion 40, the pin 62 and
An engaging portion 64 including a roller 63 having a plane parallel to the facing position is provided at a midpoint between the crankshafts 53 and 55.

At the tip of the other crank 51 on the crank 49 side, the engaging portion is
An accommodating portion 61 for slidably accommodating and accommodating 64 is provided as a rectangular hole whose left and right sides are the longitudinal direction. Crank 49
When the crank swings, the crank 51 moves through the engaging portion 64 and the accommodating portion 61.
Also, the engaging portion 64 swings in the front-rear direction while the roller 63 slides and rotates with respect to the pin 62, and the housing portion 61
Slide in the left and right directions. At this time, the engaging portion 64 and the housing portion 61
Since the surfaces contact each other in parallel to each other, the sliding contact surface is less worn, the play and vibration are less likely to occur, and reliable power transmission can be achieved.

As shown in FIGS. 1, 5, and 6, the outer end of the crank 49 is connected to a link 67 via a pin 65, and the cutting blade shaft 69 connected to the link 67 drives the crank 49 to force the crank 49. It is rocked.

<Effects of the Invention> In the device of the present invention configured as described above, the knife head is provided on the lower side by providing a notch on the receiving blade for the lower blade whose upper and lower surfaces are covered by the upper blade and the receiving blade. Since it can be attached from above, it is possible to manufacture and process the knife head and the knife bar as separate bodies.

Therefore, it is possible to reduce the processing cost of the knife bar and the knife head.

Further, since the upper blade and the lower blade can have the same shape, the cost can be reduced also in this respect.

In addition, one side of the notch is covered by the knife head for the upper blade to prevent the entry of straw debris, and mud and straw debris on the cutting blade device that fell to the part not covered by the knife head. Since these are dropped and removed below the receiving blade through the notch, there is an advantage that troubles due to biting of mud or the like are reduced.

[Brief description of drawings]

FIG. 1 is a plan view of the cutting blade device, FIG. 2 is a cross-sectional view taken along the line AA showing the mounting state of the cutting blade device, FIG. 3 is a cross-sectional view taken along the line BB showing a clip holding portion of the cutting blade, and FIG. Is a side sectional view showing a state where the knife head is attached to the cutting blade, FIG. 5 is a sectional view taken along line C-C showing a connecting state between the link and the crank and the knife head and the engaging portion, and FIG. 6 is a connecting state between the cranks. And a D-D cross-sectional view showing a connected state of the crank and the knife head,
FIG. 1 is a side view of a pretreatment unit of a combine in which the device of the present invention is implemented. 15: Blade stand, 15a: Notch 17: Upper blade, 19: Lower blade 37,39: Knife head

Claims (1)

[Scope of utility model registration request] 1. A lower blade (19) slidably superposed on the tip of a blade holder (15) attached to the frame side.
And the upper blade (17) are held, and the knife heads (39), (3) are respectively provided on the lower surface side of the lower blade (19) and the upper surface side of the upper blade (17).
Attach each of the tips of (7) to the knife heads (39), (3
The lower blade (19) and the upper blade (1
In a mechanism for sliding 7) in opposite directions, a notch (15a) for accommodating the knife head (39) in a laterally movable state at a position corresponding to the knife head (39) of the blade holder (15). Forming the knife heads (39), (3
At the end adjacent to 7), the knife head (3
A blade holder for a cutting blade device configured such that the side end of (7) is overlapped with the knife head (39) on the lower blade (19) side in plan view and covers the cutout (15a).