JP2005224131A - Reaper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clippers type reaper which comprises a fixed blade, a movable blade which can laterally reciprocatively be slid in a state superposed on the fixed blade, and a driving means for reciprocatively sliding the movable blade, and can solve a trouble that vibrations and noises produced from a vibration source such as the movable blade or a driving means are enlarged, especially when the movable blade is reciprocatively slid at a high speed. <P>SOLUTION: This reaper is characterized in that the sliding stroke S of the movable blade 32 laterally reciprocatively slid in the state superposed on the fixed blade is controlled to a distance corresponding to two pitches of the movable blade 32. Thereby, the reciprocative sliding speed of the movable blade 32 is the same as the conventional speed in a state that the number of rotations of a crank shaft 41 integrally rotated on a reaping blade-driving shaft 30, and the swinging speed of a swinging arm 39 swung through a rod 40 connected to the crank shaft 30 are controlled to the halves of conventional speeds. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a clipper-type combine harvester or binder harvesting device including a movable blade that overlaps with a fixed blade and reciprocally slides left and right.

Conventionally, a cutting blade such as a combine or a binder is operated to reciprocate a cutting blade slidably contacted on the receiving tooth via a crank mechanism, and a sliding stroke of the cutting blade with respect to the receiving tooth is equivalent to one pitch of the cutting blade. A device provided with a so-called clipper type mowing device is known (for example, see Patent Document 1).
JP-A-11-225529 (page 3, FIG. 2)

  However, the conventional reaping device has a drawback in that vibration and noise generated from an oscillating source such as a cutting blade and a crankshaft increase particularly when the cutting blade is slid back and forth at high speed.

  The present invention was devised for the purpose of solving the above-described problems, and is a clipper provided with a movable blade that overlaps with a fixed blade and reciprocally slides left and right, and a driving means that reciprocally slides the movable blade. In this type of reaping device, the sliding stroke of the movable blade is equivalent to two pitches of the movable blade.

  According to the present invention, the reciprocating sliding speed of the movable blade is the same as that of the prior art by making the sliding stroke of the clipper type movable blade that overlaps the fixed blade and reciprocally slides left and right equivalent to two pitches of the movable blade. Although the speed is the same, the reciprocating operation speed of the driving means for reciprocating the movable blade can be halved as compared with the prior art, thereby reducing the vibration and noise generated from the excitation source such as the driving means. In addition, the durability of the reaping device can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a right side view of a combine 1, and the combine 1 includes a pair of left and right crawler travel devices 2, 2, and a body frame 3 on the crawler travel devices 2, 2 can be raised and lowered to one front side A pretreatment unit 4 is installed and a threshing unit 5 is mounted on the rear side. On the other side of the machine frame 3, a grain tank 9 including a control unit 6, a driver's seat 7, and a grain discharge auger 8 is mounted, and behind the threshing unit 5 and the grain tank 9, A scissor processing device (cutter) 10 is provided.

  And the weeding body 12..., The pulling device 13..., The cutting device 14, the take-up conveying device 27 (see FIG. 2), etc. are mounted on the cutting frame 11. At the same time, the preprocessing unit 4 is installed to be movable up and down by a transmission shaft case 15 provided in an inclined manner at the rear of the preprocessing unit 4 and an auxiliary pipe frame (not shown).

  FIG. 2 is a transmission system diagram of the preprocessing unit 4. After the driving force of the engine (not shown) is input to the counter transmission device 21, one is output as the driving force of the handling depth conveying device 22. The other is branched and output to a transmission shaft 15a inserted in the transmission shaft case 15 via bevel gears B1 and B2.

  Then, on the lower transmission side of the transmission shaft 15a, after branching to the lateral transmission shaft 25 via the bevel gears B3, B4, via the torque limiters 26, 26 to the take-up conveying device 27,. , B 7, B 8, B 9, B 10 to the pulling device 13, and further the bevel gear B 11, B 12 provided at the shaft end of the lateral transmission shaft 25 and the cutting blade drive shaft 30 to the cutting device 14. It is output.

  FIG. 3 is a perspective view showing the configuration of the reaping device 14. The reaping device 14 is movable so as to reciprocally slide left and right after overlapping with a number of fixed blades (receiving teeth) 31. A so-called clipper-type cutting blade composed of blades (cutting blades) 32... Can be harvested such as rice straw and wheat straw, and is fixed to the cutting frame 11. The fixed blades 31 are arranged and fixed on the blade mounting plate 33, and the movable blades 32 having the same pitch arrangement as the fixed blades 31 are fixed to the knife bar 34, which are fixed on the fixed blade mounting plate 33. The movable blades 32 are provided so as to be slidable back and forth with respect to the fixed blades 31 by being pressed by an appropriate number of cutting blade holders 35 while being positioned and mounted on the fixed blades 31.

  The driving means M for reciprocally sliding the movable blades 32... Is fixed to the knife bar 34 and has a passive member 36 in which a vertical U-shaped groove is formed in the rear direction, and a U-shaped groove of the passive member 36. A swing arm 39 that is fitted with a slide roller 37 and swings integrally around a rotation shaft 38, and the swing arm 39 is swung via a rod 40 having a turnbuckle length adjustment function. A crank shaft 41 to be moved, and a balance weight 42 formed integrally with the crank shaft 41 on the lower transmission side of the cutting blade drive shaft 30, and bevel gears B 11 and B 12 provided at the shaft end of the lateral transmission shaft 25. When the cutting blade drive shaft 30 is rotated once, the swing arm 39 swings via the rod 40 connected to the crankshaft 42, whereby the movable blade 32 is reciprocally slid with a predetermined set stroke. Like To have.

  4, the arm ratio of the swing arm 39 is set so that the sliding stroke S of the movable blade 32... Is equivalent to 2 pitches (2 × P) of the movable blade 32. The crankshaft 41 that rotates integrally around the cutting blade drive shaft 30 is changed by changing the gear ratio of the bevel gears B11 and B12 to reduce the rotational speed of the cutting blade drive shaft 30 to ½ that of the conventional one. The reciprocating sliding of the movable blade 32... Is performed in a state in which the rotational speed and the reciprocating operation speed and reciprocating rocking speed of the swing arm 39 swinging through the rod 40 connected to the crankshaft 41 are halved compared to the conventional one. The dynamic speed can be configured to be the same as the conventional speed. In other words, while the reciprocating sliding speed of the movable blades 32... Is the same as that of the prior art, the reciprocating operation speed of the driving means M for reciprocatingly sliding the movable blades 32. It is possible to reduce vibration and noise generated from a vibration source such as the driving means M and improve the durability of the reaping device 14.

  In addition, the general fixed blade 31 and the movable blade 32 as shown to Fig.5 (a) are formed as the blade body B of a substantially isosceles triangle by planar view using the steel plate of the same thickness. More specifically, the blade body B is composed of an attachment base Ba for attaching to the fixed blade attachment plate 33 and the knife bar 34 and a cutting blade portion Bb, and a cutting blade Be on the isosceles edge of the cutting blade portion Bb. , Be are formed symmetrically and the lateral width of the mounting base Ba is formed wider than the lateral width of the root portion of the cutting blade Bb. The mounting base Ba is provided with a pair of left and right holes Ha, Ha for mounting the fixed blade 31 and the movable blade 32 to the fixed blade mounting plate 33 and the knife bar 34.

  And the shape of the general fixed blade 31 and the movable blade 32 formed as a substantially isosceles triangular blade body B in plan view is as shown in the drawing in the left-right width dimension of the root portion of the cutting blade portion Bb, that is, isosceles. The dimension corresponding to the base of the triangle is 50 mm, and the dimension corresponding to the height of the isosceles triangle is 44 mm. On the other hand, as another embodiment, the shapes of the fixed blade 31 ′ and the movable blade 32 ′ shown in FIG. 5B are 90 mm in dimension corresponding to the base of the isosceles triangle, and the dimension corresponding to the height of the isosceles triangle. 55 mm, which is formed larger than the general fixed blade 31 and the movable blade 32, and is formed into rice bran, wheat straw, etc. by the movable blade 32 ′ that overlaps with the fixed blade 31 ′ and slides back and forth left and right When cutting the cut object, the fixed blade 31 ′ and the movable blade 32 ′ expand when compared with the conventional one, so that the trapping ability of the bundle-like cut object is improved and The efficiency is improved, thereby reducing the occurrence of cutting residue even in high-speed cutting. As described above, the fixed blade 31 ′ and the movable blade 32 ′ having a large overall shape are reciprocally slid at the rotation speed of the normal cutting blade drive shaft 30 to enable high-speed cutting.

  By the way, as illustrated in FIG. 6, on the sliding surface side of the fixed blade 31... And the movable blade 32..., The sliding surface except for the left and right symmetrical cutting blades Be and Be of the both blades 31 and 32 is concave. The portions 31d and 32d may be formed with each other, thereby reducing the relative sliding area of the entire blades 31 and 32 and reducing the sliding resistance.

  In the conventional reaping device, a dedicated lubricating oil supply device is provided on the sliding surfaces of the fixed blade 31... And the movable blade 32. In order to supply lubricating oil, complicated pipes and pumps must be provided, and it takes time to assemble them, resulting in high costs and sliding between the fixed blade 31 and the movable blade 32. Good lubrication performance was not always obtained due to mud and dust adhering to the lubricating oil supplied to the surface. In addition, when the lubricating oil adheres to the culm after harvesting a harvested item such as rice straw or wheat straw, the attached lubricating oil may adversely affect the post-treatment of the culm, and is illustrated in FIG. As described above, on the sliding surface side of the movable blade 32,..., A circular recess 32h is formed on the sliding surface excluding the symmetrical cutting blades Be and Be of the movable blade 32, and the recess 32h can be loaded. Incorporating a solid lubricant W mainly composed of molybdenum disulfide pre-formed in the recess 32h, the solid blade W slides between the fixed blade 31 and the movable blade 32 by a reliable and strong lubricating action. It is possible to reduce the resistance, and it is difficult for mud and dust to adhere to the sliding surfaces of the fixed blade 31... And the movable blade 32. Can reduce costs It is achieved.

The side view of a combine. The transmission system diagram of a pre-processing part. The perspective view of a reaping device. The top view which shows the sliding stroke of a movable blade. (A) The top view which shows the shape of a common fixed blade and a movable blade. (B) The top view which shows what enlarged the whole shape of the fixed blade and the movable blade. The top view and side view which show the sliding resistance reduction means of a cutting blade. The top view and side view which show the sliding resistance reduction means of the cutting blade by a solid lubricant.

Explanation of symbols

14 Mowing device 31 Fixed blade 32 Movable blade S Sliding stroke M Drive means

Claims (1)

  A clipper type reaping device (14) provided with a movable blade (32) which is superimposed on the fixed blade (31) and reciprocally slides left and right, and driving means (M) which reciprocally slides the movable blade (32). The reaping device is characterized in that the sliding stroke (S) of the movable blade (32) corresponds to two pitches of the movable blade (32).

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