JPH09121643A - Structure for installing reaping blade of harvester - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the installation and removal of a reaping blade and improve the operating efficiency. SOLUTION: This structure for installing a reaping blade of a harvester is obtained by integrally fixing reaping blade supporting stays 50 and 50 to left and right longitudinal frame parts (34b) and (34b) and forming prescribed spatial parts 54 in the reaping blade supporting stays 50 and 50 so as to slide a reaping blade in the front and rear directions and engage the reaping blade with a reaping blade driving part in the harvester equipped with the reaping blade supporting stays 50 and 50 attached to the lower part of left and right longitudinal frames (34b) and (34b), a reaping blade pedestal 42 bridged between the reaping blade supporting stays 50 and 50 and the reaping blade 28 supported by the reaping blade pedestal 42 so as to enable the free reciprocating and sliding. The reaping blade supporting stays 50 and 50 are fixed to the longitudinal frame parts (34b) by welding. The reaping blade pedestal 42, bridged between the reaping blade supporting stays 50 and 50, together with the reaping blade 28, can be slid in the front and rear directions of the machine body with the spatial parts 54 and the reaping blade 28 can be engaged with bell-cranks by the sliding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting blade mounting structure for harvesters such as combine harvesters, and more particularly to a cutting blade mounting structure for harvesters in which cutting blades are attached to lower portions of pretreatment frames on the left and right sides of the machine body.

[0002]

2. Description of the Related Art Generally, in harvesters such as combine harvesters, a cutting blade pedestal with a cutting blade attached is attached to the lower side of a pretreatment frame, but when the cutting blade is worn and needs to be ground. Also, when exchanging the cutting blade, it is necessary to attach and detach the cutting blade together with the cutting blade cradle. As such a cutting blade mounting structure, a technique described in, for example, Japanese Utility Model Laid-Open No. 62-53621 is conventionally known.

According to this conventional example, as shown in FIG.
The cutting blade support stay 50 is attached to the lower part of the pretreatment frame 34 so as to be vertically swingable about the shaft 101 on one end side as a fulcrum.
The cutting blade support 42 that supports the cutting blade 28 is detachably connected to the cutting blade support stay 50, and the pretreatment frame 34 is provided.
At the time of attachment to the pretreatment frame 34, the other end of the cutting blade support stay 50 is lifted in the direction of arrow A, and the cutting blade pedestal 42 and the cutting blade 28 are fastened to the pretreatment frame 34 by the screws 102 and the like via the bracket 103. It was

[0004]

However, since the above-mentioned cutting blade receiving base 42 is heavy, the work for attaching and detaching the cutting blade 28 has not been easy. In particular, when the cutting blade 28 is attached to the pretreatment frame 34, it is necessary to perform alignment work and the like with screws (102) etc. with the heavy cutting blade support 42 being lifted. , Needed a lot of power.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a cutting blade mounting structure for a harvester which can easily attach and detach the cutting blade to improve workability. To provide.

[0006]

In order to achieve this object, the present invention provides a cutting blade support stay (5) at the bottom of the left and right pretreatment frames (34, 34) located at both ends of the cutting width of the grain culm.
0, 50) and attach these cutting blade support stays (50,
The cutting blade pedestal (42) is bridged between 50),
In the harvester (10) in which the cutting blade (28) is reciprocally slidably supported by the cutting blade supporting member (2), the cutting blade support stay (50, 5) is provided.
0) is integrally fixed to the pretreatment frame (34, 34), and the cutting blade (28) is slid in the front-rear direction of the machine body (12) to engage with the cutting blade drive unit (46, 46 '). In order to do so, the cutting blade support stay (50) is provided with a space (54).
Is formed.

Preferably, the cutting blade support stay (50)
The front part of the is formed so as to be inclined (50a) so as to descend obliquely from the front of the machine to the rear.

Further preferably, the cutting blade receiving stand (42) is provided at the rear portion of the cutting blade receiving stand (42) with a cutting blade supporting stay (50).
A notch recess (56) is provided to prevent the disengagement from the.

(Operation) According to the present invention having the above-mentioned structure, the harvester (10) is provided with a cutting machine attached to the lower portions of the left and right pretreatment frames (34, 34) located at both ends of the cutting width of the grain culm. Blade support stays (50, 50) and cutting blade cradle (42) bridged between these blade support stays (50, 50)
And a cutting blade (28) supported on the cutting blade receiving base (42) so as to be reciprocally slidable. The cutting blade support stay (5
0) is integrally fixed to the pretreatment frame (34), and a predetermined space portion (54) is formed in the cutting blade support stay (50).

Due to the presence of this space portion (54), the cutting blade cradle (42) bridged between the cutting blade support stays (50, 50) and the cutting blade (28) together with the body (12). And the cutting blade (28) can be engaged with the cutting blade drive section (46, 46 ') by this slide, and at this time, the cutting blade pedestal (4)
The force to be applied to the cutting blade cradle (42) for moving 2) can be extremely small.

The above-mentioned reference numerals in parentheses are shown for reference to the drawings and do not limit the structure of the present invention.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. It should be noted that members that are the same as or correspond to those in the above-described conventional example are denoted by the same reference numerals and will be described.

FIG. 1 is an external perspective view of a combine to which the present invention is applied. In FIG. 1, the combine 10 is
The driver's seat 14 is provided on the upper portion of the body 12 and the body 12
And a feed chain 18 for holding and transporting the grain culm cut by the pretreatment unit 16 in a state of lying sideways.
And a threshing unit 20 for accommodating and threshing the grain culm conveyed by the feed chain 18, and a pair of left and right crawler traveling devices 22, 22 for supporting the machine body 12.

Further, the pre-processing section 16 has the same structure as that shown in FIGS.
As shown in, a divider 24 installed side by side at a predetermined interval at the front end of the machine in order to divide the grain culm into a number of cutting lines,
The dividers 24, 24, ... Provoking device 26 that causes grain culms to be introduced between them, a cutting blade 28 that cuts the roots of the grain culms that have been raised, and a grain located above the cutting blade 28. It comprises a scraping device 30 for scraping the culm, a handling depth conveying device 32, and the like.

The pretreatment frame 34, to which the divider 24 and the cutting blade 28 are assembled, integrally includes a horizontal frame portion 34a extending in the left-right direction and a plurality of vertical frame portions 34b protruding forward from the horizontal frame portion 34a. The divider 24 is attached to the tip of each vertical frame portion 34b, and the cutting blade 28 is attached below the middle portion of each vertical frame portion 34b.

As shown in FIG. 3, round bar-shaped cutting blade support stays 50, 50 are attached to the lower portions of the left and right vertical frame portions 34b, 34b located at both ends of the cutting width of the grain culm. A cutting blade receiving base 42 having an L-shaped cross section is bridged between the left and right cutting blade supporting stays 50, 50,
The cutting blade 28 is supported so as to be slidable back and forth.

As shown in FIGS. 4 (a) and 4 (b), the cutting blade 28 has a pair of blades 40, 40 'formed by connecting a large number of knives 36, 36' by a knife bar 38 and vertically superposed on each other. Is configured. And the double-edged bodies 40, 40 'are
It is mounted so as to be capable of reciprocating left and right between a cutting blade receiving base 42 having a width dimension substantially the same as that of the horizontal frame portion 34a and a holding plate 43 provided at an appropriate position in the horizontal direction. In addition, a knife head 44, which is provided at the rear of each blade 40, 40 ',
44 'is a pair of bell cranks 4 which are interlockingly connected to each other.
6, 46 ', respectively. As a result, as the piston rod 48 connected to one of the bell cranks 46 reciprocates back and forth, the blade bodies 40, 40 'reciprocate left and right in opposite directions to cut the grain culms.

In the present invention, the cutting blade support stay 50 is integrally fixed to the pretreatment frame 34, and the cutting blade 28 is slid in the front-rear direction of the machine body 12 to engage with the cutting blade drive section. A space is formed in the cutting blade support stay 50.

That is, as shown in FIG. 3, FIG. 5 and FIG. 6 described above, in the present embodiment, the preprocessing frame 3 is used.
4, a cutting blade support stay 50 is integrally welded and fixed, and a front portion of the cutting blade support stay 50 is formed with an inclined portion 50a that obliquely descends from the front of the machine body 12 to the rear. . The inclined portion 50a prevents the grain stem from being caught by the cutting blade support stay 50 during the mowing operation. Furthermore, the cutting blade support stay 5 formed in this way
At the front part of 0, a space 54 is formed so that the cutting blade 28 can slide back and forth.

Thus, the left and right cutting blade support stays 5
The cutting blade support 42 on which the cutting blade 28 is supported between 0 and 50.
Is bridged, but a space 5 is formed at the front of the cutting blade support stay 50.
Since 4 is formed, when bridging the cutting blade pedestal 42, the cutting blade pedestal 4 has a certain space in terms of space.
2 can be placed on each of the cutting blade support stays 50.

In this case, as shown in FIGS. 3 and 7 (a) and (b), the cutting blade pedestal 42 is a bent portion having an L-shaped cross section, and notches are provided near both ends of the cutting width. Recesses 56, 56 are formed, and the notch recesses 56, 56 are fitted into the cutting blade support stays 50, 50, respectively, to prevent the cutting blade receiving base 42 from coming off from the cutting blade support stay 50. To be done.

By making the length of the cutout recess 56 larger than the diameter width of the cutting blade support stay 50, there is play between the cutting blade support stay 50 and the cutting blade support stay 50. The attachment of 42 to the cutting blade support stay 50 can be facilitated. Moreover, since the notch recesses 56 are provided near both ends of the cutting width, the rigidity of the cutting blade receiving base 42 is hardly affected.

In this way, the cutting blade support stays 50, 5
The cutting blade cradle 42 bridged between 0 and the cutting blade support stay 50,
The bell crank 46, 4 as a cutting blade drive unit is slid in the front-rear direction of the machine body 12 while being placed on 50.
The knife heads 44, 44 'can be engaged with 6'. After this engagement, the mounting hole 60 provided in the cutting blade support 42 through the spacer block 58 mounted on the vertical frame portion 34b and the screw hole 58a formed in the spacer block 58 are aligned with each other. , The bolts 62 fasten the cutting blade pedestal 42 to the vertical frame portion 34b.

Next, the operation of the present embodiment will be described.

The cutting blade 28 for cutting grain culm is
If it becomes worn or damaged, a new cutting blade 28
However, it is necessary to remove the cutting blade 28 from the machine body 12 for this purpose. For this removal, the cutting blade support 42
After removing the bolts 62 fastening the vertical frame portion 34b, the cutting blade receiving base 42 is detached from either one of the left and right cutting blade supporting stays 50, and similarly, the cutting blade receiving base is also applied from the other side. 42 should be removed.

On the other hand, in order to mount a new cutting blade 28 or a polishing blade 28 that has been polished on the machine body 12, the heavy cutting blade support 42 is placed on the cutting blade support stay 50, and then the positioning is performed.
Further, since it is necessary to tighten screws, etc., it is not so easy as when removing.

That is, first, the left and right cutting blade support stays 5
The cutting blade receiving base 42 is placed on either one of 0 and 50, and the notch recess 56 of the cutting blade receiving base 42 is fitted into the cutting blade supporting stay 50 so that the cutting blade supporting stay 50 cuts the blade. Make sure that the pedestal 42 does not come off. Next, the other side of the cutting blade receiving base 42 is placed on the other cutting blade supporting stay 50, and the notch concave portion 56 of the cutting blade receiving base 42 is similarly fitted into the cutting blade supporting stay 50.

As a result, the cutting blade receiving base 42 is bridged between the cutting blade supporting stays 50, 50. In this state, the knife heads 44, 44 'of the cutting blade 28 are still in the bell crank 46. , 46 'are not engaged. Therefore, the cutting blade receiving base 42 is slid rearward of the machine body on the cutting blade supporting stays 50, 50. Since the urging force required at this time is only required to be able to move against the frictional force, a remarkably small force is sufficient as compared with the case of lifting the cutting blade receiving base 42.

In this way, by sliding the cutting blade support 42, the knife heads 44, 44 'are moved to the bell crank 4
6, 46 ', and the mounting hole 60 provided in the cutting blade pedestal 42 in that state and the screw hole 58a of the spacer block 58 integrally mounted to the vertical frame portion 34b are matched by fine adjustment. Let Then, when the holes are aligned with each other, the cutting blade receiving base 42 is fastened to the vertical frame portion 34b with the bolts 62, and the attachment of the cutting blade 28 to the machine body 12 is completed.

[0030]

As described above, according to the present invention, the cutting blade support stay is integrally fixed to the pretreatment frame, and the cutting blade can be slid on the cutting blade support stay in the longitudinal direction of the machine body. By forming the space portion, when the cutting blade cradle is bridged between the cutting blade support stays and then the cutting blade is engaged with the cutting blade drive unit, the cutting blade is simply slid on the cutting blade support stay. Therefore, the cutting blade can be easily attached and detached, and thus workability can be improved.

Further, since the cutting portion supporting stay is formed with an inclined portion which obliquely descends from the front to the rear of the machine body, it is possible to prevent the grain culms from being caught on the cutting blade supporting stay.

Further, by providing the cutout recessed portion in the rear portion of the cutting blade pedestal, the cutting blade pedestal can be easily attached to the cutting blade support stay without affecting the rigidity of the cutting blade main body. At the same time, it is possible to prevent the cutting blade receiving base from coming off the cutting blade supporting stay.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a combine to which the present invention is applied.

FIG. 2 is a schematic side view of a preprocessing unit.

FIG. 3 is an external perspective view of a cutting blade mounting portion.

FIG. 4A is a plan view of an essential part of a cutting blade mounting portion. (B) It is the side view.

FIG. 5 is a side view of the cutting blade mounting portion before engagement with the cutting blade drive portion.

FIG. 6 is a side view after the cutting blade mounting portion is engaged with the cutting blade drive portion.

FIG. 7 (a) is a partial plan view of a cutting blade mounting portion. (B) It is the side view.

FIG. 8 is a side view showing a conventional cutting blade mounting structure.

[Explanation of symbols]

 10 Combine 12 Airframe 16 Pretreatment section 24 Divider 28 Cutting blade 34 Pretreatment frame 34a Horizontal frame section 34b Vertical frame section 40,40 'Blade body 42 Cutting blade cradle 44,44' Knife head 46,46 'Bell crank 50 Mowing Blade support stay 50a Inclined portion 54 Space portion 56 Notched concave portion

Claims (3)

[Claims] 1. A cutting blade support stay is attached to the lower part of the left and right pretreatment frames located at both ends of the cutting width of a grain culm, and a cutting blade pedestal is bridged between these cutting blade support stays. In a harvester that supports a cutting blade so that it can slide back and forth, the cutting blade support stay is integrally fixed to a pretreatment frame, and the cutting blade is slid in the front-back direction of the machine body to cut the blade. A space is formed in the cutting blade support stay so as to engage with the cutting blade mounting stay. 2. The cutting blade mounting structure for a harvester according to claim 1, wherein a front portion of the cutting blade support stay is formed so as to be inclined so as to descend obliquely from the front of the machine to the rear. . 3. The cutting recess for preventing the cutting blade support from coming off from the cutting blade support stay is provided at the rear portion of the cutting blade support. Harvester cutting blade mounting structure.