JPH0568220U - Support device for knife head for cutting blade - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention maintains the cutting performance of a cutting blade such as a combine harvester. Constitution: Upper and lower cutting blades 4, 6 are piled up and slid relative to each other for mowing, and a slit 12 at a rear end of a knife head 9 of an upper blade 4 is provided with a collar 18 on a side of a bell crank 16. In which the blade is housed and the cutting blade is driven, a support portion 37 for supporting the rear end of the knife head 9 is provided on the peripheral surface of the collar 18.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a support device for a knife head for a cutting blade in a combine or the like.

[0002]

[Prior Art]

 Conventionally, the cutting blade portion 1 in a general-purpose combine is mounted so as to be supported via a blade holder 3 that is laterally provided on the bottom surface side of the pretreatment frame 2 at the bottom portion of the pretreatment portion, as shown in FIG. The upper and lower saw blades 4 and 6 are supported on the receiving table 3 so as to be slidable relative to each other so as to be slidable relative to each other. The upper and lower cutting blades 4 and 6 are fixed to upper and lower knife bars 7 and 8 (see FIG. 3) that extend over the entire length of the left and right, and the knife bars 7 and 8 are plate-shaped knife heads 9 protruding from the rear. , 11 are fixed to the front ends of the knife heads 11 and 11, and the knife heads 9 and 11 are reversely driven to the left and right to form an up-and-down double-action cutting blade device.

A rear open type slit (notch or window-shaped hole) 12 is formed at the rear end of the knife heads 9 and 11, and the output arms 16 and 17 of the rear L-shaped bell cranks 13 and 14 are formed. Driving collars 18 and 19 installed upright at the tip are accommodated in the slit 12, and the upper and lower cutting blades 4 and 6 are reversely driven left and right to slide by the left and right movements of the output arms 16 and 17, respectively. ing. Sliding guide plates 21 are fixedly provided on both sides of the slit 12 in contact with the colors 18 and 19 (see FIG. 3). In the above-mentioned structure, the upper and lower cutting blades 4, 6 and the knife bars 7, 8 and the tip ends of the knife heads 9, 11 are all supported by the blade holder 3, but the rear ends of the knife heads 9, 11 are In order to make the drive from the output arms 16 and 17 smooth, it only projects to the side of the colors 18 and 19 and is not specially supported.

[0004]

[Problems to be solved by the device]

 However, in the mechanism as described above, a downward load is applied to the rear ends of the knife heads 9 and 11, and in particular, the rear end of the knife head 9 on the upper blade side is lowered downward and the tip of the upper blade 4 is moved upward. As a result of tilting so as to rise, a gap is formed on the tip side of the upper blade 4 and the lower blade 6, which has the drawback of preventing cutting performance. In order to solve these problems, the present invention provides a support portion for supporting the rear end of the knife head on the collar side so as not to interfere with the lateral drive transmission from the bell cranks 13 and 14 to the knife head. It is something to do.

[0005]

[Means for Solving the Problems]

 In the knife head supporting device of the present invention which solves the above-mentioned problems, an upper blade 4 which can reciprocate and slide is provided on a lower blade 6 which constitutes a cutting blade, and a slit 12 for color engagement is formed at a rear end. The knife head 9 is attached to the rear of the upper blade 4 and the driving collar 18 reciprocally swung by the bell crank 13 is housed in the slit 12 to support the knife head 9 on the outer circumference of the collar 18. It is characterized in that a supporting portion 37 is provided.

[0006]

[Action]

 Since the support portion 37 for supporting the rear end side of the knife head 9 on the upper blade 4 side is provided on the outer periphery of the collar 18 attached to the bell crank 16 side, the rear end of the knife head 9 is stably supported, and the knife head 9 is stably supported. It is possible to prevent a gap from being formed in the overlapping surfaces of the upper and lower cutting blades 4 and 6 due to the inclination of 9.

[0007]

【Example】

 The embodiments shown in the drawings will be described in detail below. Since the entire structure of the cutting blade device shown in FIG. 1 is common to the embodiments of the present invention, the reference numerals and the like are also used in the embodiments shown in FIG. I will omit the contents of.

In FIG. 3, a lower blade guide 22 in the left-right direction is fixedly provided laterally at a point on the tip of the receiving table 3 and slidably contacts the front side of the lower blade side knife bar 8, and the upper surface thereof is The lower blade 6 is placed so as to be slidable from left to right, and a guide spacer 23 is attached to a rear end side portion of the receiving table 3 together with the lower blade guide 22 so that the knife bar 8 is slidably guided from the rear surface side. .

A guide spacer for guiding the upper blade side knife bar 7 from the rear side through a guide spacer 23 and a color-shaped spacer 24, etc., at appropriate points on the rear end upper surface side of the receiving table 3. 26 and the upper blade guide support plate 27 are sequentially fixedly overlapped and attached by bolts 28, and the front lower surface of the upper blade side knife bar 7 and the upper surface of the upper blade 4 are slid together on the lower end surface of the support plate 27. An upper blade guide 29 for contact guide is attached.

In the slit 12 of the upper blade side knife head 9, a pin 31 erected at the tip of the output arm 16 of the bell crank 13 and a collar 18 rotatably fitted to the pin 31 are concentrically arranged. As shown in FIG. 2, the collar 18 is accommodated and forms a plane in which the left and right sides are parallel to each other, and is configured to be slidable only in the front-rear direction in the slit 12 in the fitted state. A plate 32 is attached to the upper end of the pin 31 by a bolt 33 so as to prevent the collar 18 from being pulled out while allowing the rotation of the collar 18. The collar 18 is mounted on the upper surface of the collar portion 34 formed on the outer periphery of the lower portion of the pin 31.

A ring groove 36 having a square cross section is formed on the outer periphery of the lower portion of the collar 18, and the ring groove is composed of two C rings 37a and 37b for mounting the rear end of the knife bar 9 on the upper surface thereof. A knife bar support portion 37 is detachably provided. At least one (upper side) of the two C-rings 37a, 37b is fitted in a freely rotatable state so as to slide against each other when the knife head 9 is driven left and right to prevent wear. As shown in FIG. 3, the ring 36 is also provided at the upper outer peripheral position of the collar 18 to form a support portion 37 for setting the cutting blades 4, 6 at the upper position. Further, the support 37 is not necessarily limited to the detachable C-ring, but may be integrally formed with the collar 18 in the form of a collar or a flange.

A base end portion of the bell crank 13 is connected to a tip end of an input arm 38 protruding to the left side in front view, with a return rod 39, and is rocked back and forth around a rocking shaft 41 as a fulcrum. The connecting arm 42 projecting to the upper side is connected to the input arm 43 of the L-shaped bell crank 14 by the connecting roll 44, and the upper blade driving bell crank 13 and the lower blade driving bell crank 14 are connected by the input from the rod 39. It is a mechanism that swings around a swing shaft 46 as a fulcrum to move the upper and lower cutting blades 4 and 6 left and right relative to each other.

The connecting roll 44 is inserted into the rectangular connecting hole 47 formed in the input arm 43 of the bell crank 14 from the lower side so as to be slidable left and right, and its plane cross section is substantially the same as the front and rear width of the connecting hole 47. It has a matching circle shape and is rotatably fitted to a pin 48 standing upright on the side of the connecting arm 42. When the bell crank is driven, it rotates to prevent wear and evenly wear around the entire circumference. ing.

[0014]

[Effect of the device]

 Since the device of the present invention is configured as described above, the knife head for the upper blade always reciprocates together with the collar while being supported by the support portion of the driving collar, so that the knife head and the rear end of the upper blade are There is an advantage in that the tips of the upper and lower cutting blades do not open to form a gap by descending due to their weight, and the cutting performance of the cutting blade is not impaired by the gap.

[Brief description of drawings]

FIG. 1 is an overall plan view of a combine cutting device.

FIG. 2 is an enlarged plan view of a main part of the cutting blade device.

3 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 4 Upper blade (cutting blade) 6 Lower blade (cutting blade) 9 Knife head 12 Slit 18 Color 37 Support part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Tadamitsu Morihiro, 667 Izaya-cho, Higashi-Izumo-cho, Yatsuka-gun, Shimane Prefecture 1 Mitsubishi Agricultural Machinery Co., Ltd. Address 1 Within Mitsubishi Agricultural Machinery Co., Ltd.

Claims (1)

[Scope of utility model registration request] 1. A knife head having a lower blade (6) constituting a cutting blade and an upper blade (4) slidably reciprocally provided in an overlapping manner, and a slit (12) for collar engagement formed at a rear end thereof. 9) is attached to the rear of the upper blade (4), and a mechanism is provided in which a driving collar (18) reciprocally rocked by a bell crank (13) is housed in the slit (12). A support device for a knife head for a cutting blade, comprising a support portion (37) for supporting the knife head (9) on the outer periphery of the blade.