KR100711583B1 - Apparatus for operating cutting blade of combine - Google Patents

Abstract

In order to transmit a stable power to the mowing blade, the present invention is a crank yoke connected to the crank shaft reciprocating in a linear direction; A mowing arm including a first extension part and a second extension part which are inclined at a predetermined angle, and rotatably installed by stirring from side to side based on a central point of the first extension part and the second extension part; A crank having one end inserted into the crank yoke and the other end rotatably connected to the second extension portion; A cutting blade connected to the first extension part to perform a cutting operation as the cutting arm is rotated by stirring; And a hollow cylindrical shape having a through-hole formed at a center thereof, the bush being rotatably coupled to a first shaft provided in the first extension part, and made of MC nylon synthetic resin material provided at the connection part of the first extension part and the cutting blade. It provides a cutting blade drive device for combines comprising a.

Combines, mowing devices, bushes, synthetic resin

Description

Cutting blade drive for combines {apparatus for operating cutting blade of combine}

1 is a side view showing the front portion of the combine according to the prior art.

2 is a cross-sectional view showing a driving device for a combine harvester blade according to the prior art.

Figure 3 is a plan view of the operation structure of the harvesting blade for the combine in accordance with an embodiment of the present invention.

Figure 4 is a side cross-sectional view of the blade drive device for combines according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

117: crank yoke 120: crank

125: cutting rock 129: first axis

130: cutting day 131: home

140: bush

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to combines, and more particularly, to a combine blade drive device for combines, which improves the operating structure of the combine blades.

In general, combines are agricultural machinery used to harvest rice, barley, wheat and the like. Power generated by the engine located below the combine body is transferred to the cutting blade, and grains such as rice, barley, and wheat are harvested by driving the cutting blade.

Since the combine is operated outdoors due to the characteristics of the work, the combine is operated in the state of being exposed to foreign substances such as straw and gum light generated in the process of harvesting the grain.

1 is a side view showing the front portion of the combine according to the prior art.

As shown in FIG. 1, a traveling device 9 is provided below the combine body 15, and a harvesting device 1 is provided in front of the main body 15. The upper portion of the harvesting device 1 is provided with a confluence transporting device 4 for joining the harvested grains and a vertical transport device 6 for moving the joined grains to a thresher provided inside the main body.

In detail, at the forefront of the mowing device 1, a grass dividing sphere 5 for dividing grains in the left and right directions is provided, and a device 2 for pulling up is provided at the rear of the grass dividing sphere 5. As such, the divided and pulled grain is mowed by the mowing device (1), the operation principle and configuration of the mowing device (1) is as follows.

First, a vertical frame 10 is installed at the front side of the traveling device 9. On the upper end of the vertical frame 10, the transmission case 11 is rotatably installed on the basis of the horizontal rotation axis. The outer circumferential surface of the transmission case 11 is connected to the drive case 12 for transmitting power to the mowing device (1), the transmission case 11 and the drive case 12 is connected to the bevel gear therein. Through this, the power is transmitted to the mowing device (1) and the mowing blade is operated by the operation principle such as barley can mowing the bottom of the grain, such as rice, barley.

Here, the drive case 12 is connected to a mowing crankshaft (not shown) and a bevel gear, and the power transmitted to the mowing crankshaft causes the mowing crank to linearly reciprocate.

2 is a perspective view showing a cutting blade drive of the combine according to the prior art.

As shown in FIG. 2, the mowing blade driving unit includes a mowing crank 20, a mowing arm 25, and a bearing 30. Here, the harvesting crank 20 is inserted into the crank yoke 19 so as to reciprocate to transfer power to the harvesting arm 25. Therefore, when the cutting crank 20 is reciprocated, the cutting arm 25 is rotated by stirring from side to side, and through this, the cutting blade connected to the cutting arm 25 is reciprocated from side to side and thus in the same manner as a barley can, Grains such as barley are harvested.

In addition, a bearing 30 is rotatably provided at the tip of the cutting arm 25, and a groove into which the bearing 30 is inserted is formed at one rear side of the cutting blade. That is, a bearing 30 is provided at the connection portion of the cutting blade and the cutting arm 25, and when the cutting arm 25 is rotated by stirring from side to side, the bearing 30 is inserted into the groove. The mowing blade is reciprocated by stirring in the horizontal direction. Here, the bearing 30 has a plurality of metal balls rotatably disposed in the circumferential direction therein, the outer case is made of a metal material.

However, the cutting blade drive of the combine according to the prior art had the following problems.

First, since the bearing and the groove into which the bearing is inserted have a tolerance in the left and right directions, when the cutting blade is driven to reciprocate by stirring the bearing left and right, the bearing stirs against the left and right edges of the groove and severely hits. There was a problem of generating vibration and noise.

Second, since the mowing blade drive unit is used in a field in which grain is grown, foreign matter containing moisture, that is, mud or gumble, is introduced between the bearing and the groove into which the bearing is inserted, and the surface of the bearing is worn down, thereby reducing lubricity. Therefore, there is a problem that the blade drive device is not continuously operated smoothly.

In order to solve the above problems, an object of the present invention is to provide a harvesting blade drive device for combines that is provided between the cutting blade and the cutting arm to transmit power more stably.

In order to achieve the above object, the combine blade drive device according to a preferred embodiment of the present invention comprises a crank yoke connected to the crank shaft reciprocating in a linear direction; A mowing arm including a first extension part and a second extension part which are inclined at a predetermined angle, and rotatably installed by stirring from side to side based on a central point of the first extension part and the second extension part; A crank having one end inserted into the crank yoke and the other end rotatably connected to the second extension portion; A cutting blade connected to the first extension part to perform a cutting operation as the cutting arm is rotated by stirring; And a hollow cylindrical shape having a through-hole formed at a center thereof, the bush being rotatably coupled to a first shaft provided in the first extension part, and made of MC nylon synthetic resin material provided at the connection part of the first extension part and the cutting blade. It is preferably made to include.

Here, the bush is preferably made of a synthetic resin material, more preferably made of MC nylon material. A groove is formed at the rear of the cutting blade, and the bush is rotatably inserted into the groove. The central portion of the bush is preferably made of a hollow cylinder formed with a through hole so that the first shaft is inserted. The end of the first shaft is preferably a nut is fastened to prevent the bush is removed.

Hereinafter, with reference to the accompanying drawings will be described in detail the harvesting drive device for a combine according to a preferred embodiment of the present invention.

3 is a plan view showing a harvesting blade driving device for a combine according to an embodiment of the present invention, Figure 4 is a side cross-sectional view of the harvesting blade driving device for a combine according to an embodiment of the present invention.

As shown in Figures 3 and 4, the cutting blade driving apparatus for combine according to an embodiment of the present invention is a crank yoke 117, cutting arm 125, crank 120, cutting blade 130, and bush (bush) It is preferable to include a) (140).

In detail, the power generated from a motor or the like mounted on the combine body causes the crankshaft inserted into the shaft hole 118 formed in the crank yoke 117 to reciprocate in a straight line. Accordingly, the crank yoke 117 connected to the crank shaft is linearly moved forward and backward with respect to the shaft hole 118, and at the same time, the yoke body 119 is rotatably provided to the left and right during the linear movement. In addition, one end of the crank 120 is inserted and connected to one side of the crank yoke 117, the other end of the crank 120 is connected to the mowing arm (125).

Here, the cutting arm 125 includes a first extension part 126 and a second extension part 127 provided to be inclined at a predetermined angle, and the other end of the crank 120 is the second extension part 127. Is rotatably connected to. In addition, the first extension portion 126 and the second extension portion 127 is installed rotatably by stirring from side to side on the basis of the center point.

To this end, a hole in which the rotation shaft 123 provided in the support frame 124 is inserted is formed at a central point of the first extension portion 126 and the second extension portion 127, and the rotation shaft 123 is formed in the hole. ) Is preferably interposed a bearing (128 in Figure 4) for rotatably supporting. The harvesting arm 125 configured as described above is rotated by stirring from side to side as the crank 120 reciprocates.

On the other hand, one side of the first extension portion 126 of the cutting arm 125 is connected to the cutting blade 130. Therefore, as the cutting arm 125 is rotated by stirring from side to side, the cutting blade 130 is reciprocated by stirring from side to side to mow the lower end of grains such as rice and barley in the same manner as barley can.

As shown in FIG. 4, the first extension part 126 is provided with a first shaft 129, and the bush 140 is rotatably coupled to the first shaft 129. Here, the bush 140 is provided at the connecting portion of the first extension portion 126 and the mowing blade 130.

In detail, a groove 131 is formed at the rear of the cutting blade 130, and the bush 140 is rotatably inserted into the groove 131. The groove 131 penetrates in the vertical direction, and the bush 140 inserted into the groove 131 may be formed to have a predetermined length in the front-rear direction so that the predetermined distance may be moved in the front-rear direction.

That is, as the cutting arm 125 rotates, the bush 140 provided in the first extension part 126 rotates along the wall surface of the groove 131 and simultaneously moves the cutting blade 130 to the left and right. . At this time, the harvesting arm 125 is not simply reciprocated in the left and right directions, but is rotated, so that the bush 140 is moved a predetermined distance in the front and rear directions when the bush 140 is reciprocated by right and left. Therefore, the groove 131 is preferably formed to have a predetermined clearance in the front and rear direction.

Here, the bush 140 is made of a synthetic resin material having good corrosion resistance and lubricity. In detail, the bush 140 is preferably made of MC nylon (MC nylon) material, MC nylon is manufactured by a molding method by a chemical change, not a physical molding method, the molecular weight of about 10 times or more than general nylon It has a degree of crystallinity of about 2 times, and there is little occurrence of residual stress.

MC nylon is a polymer of crystals prepared by using a chemical component as a catalyst in caprolactam, and has been spotlighted as a metal substitute because it has excellent mechanical strength, lubricity and heat resistance, and can be continuously used at high speed and high temperature. . In addition, since it is excellent in wear resistance, vibration resistance, water resistance, noise prevention and workability, it is suitable as a coupling member of the rotatable connecting portion of the cutting blade 130 and the cutting arm 125.

In addition, the bush 140 is preferably formed in a hollow cylindrical shape to be applied to the connection portion. That is, when the harvesting arm 125 is rotated in the left and right direction, the bush 140 is formed in an overall cylindrical shape so as to rotate along the edge of the groove 131, and the first extension part 126 is formed at the center thereof. The through hole is inserted into the first shaft 129 provided in the is formed.

On the other hand, as shown in Figure 4, it is preferable that the nut 142 is fastened to the end of the first shaft 129 to prevent the bush 140 is removed. To this end, a screw portion that is coupled to the nut 142 is formed at the end of the first shaft 129. After the bush 140 is coupled to the first shaft 129, the nut 142 is fastened and assembled to the screw unit, whereby the lower end of the bush 140 is restrained and removed from the upper end of the nut 142. Can be prevented.

Referring to the operation of the combine blade drive device according to an embodiment of the present invention described above are as follows.

First, the driving force generated in the motor of the main body reciprocates the crankshaft in the front-rear direction. At this time, the crank yoke 117 is reciprocated in the front and rear direction while rotating itself, the crank 120 coupled to the crank yoke 117 is rotated by stirring the mowing arm 125 to the left and right about the rotation axis 123. Let's do it.

Accordingly, the cutting blade 130 connected to the first extension 126 of the cutting arm 125 is moved by stirring left and right to mow the lower end of rice, barley, etc. in the same manner as a barley can. Here, the bush 140 rotatably inserted into the first shaft 129 provided in the first extension part 126 is inserted into the groove 131 formed behind the cutting blade 130 and the cutting blade 130. Since the rotation of the groove 131 along the edge of the operation, the cutting blade 130 can be reciprocated stably and smoothly from side to side.

As described above, the cutting blade drive device for combines according to the present invention has the following effects.

First, even when the bush is agitated and bumped with the left and right edges of the groove during driving due to the left and right tolerances formed between the bush and the groove into which the bush is inserted, the bush made of MC nylon absorbs the shock and thus overall vibration And noise can be significantly reduced. Moreover, the service life of the bush can be increased even under repeated impacts.

Secondly, even if mud or gumble is introduced between the bush and the groove, the bush is made of MC nylon having high surface lubricity to ensure that the blade drive is continuously operated smoothly.

Through this, the performance of the mowing blade drive can be improved to induce a comfortable and comfortable work of the operator, it is possible to increase the reliability of the combine as a whole.

On the other hand, each embodiment of the present invention as described above is configured to help the understanding of the present invention is not limited only to the above-described embodiment, the present invention various modifications within the scope without departing from the technical spirit of the above-described embodiment It includes.

Claims (6)

A crank yoke connected to the crankshaft reciprocated in a straight direction; A mowing arm including a first extension part and a second extension part which are inclined at a predetermined angle, and rotatably installed by stirring from side to side based on a central point of the first extension part and the second extension part; A crank having one end inserted into the crank yoke and the other end rotatably connected to the second extension portion; A cutting blade connected to the first extension part to perform a cutting operation as the cutting arm is rotated by stirring; And A bush made of a synthetic resin material of MC nylon, which is formed of a hollow cylinder having a through hole formed in a central portion thereof, is rotatably coupled to a first shaft provided in the first extension part, and is provided at a connection part of the first extension part and the cutting blade. Cutting blade drive device for combines comprising. delete delete The method of claim 1, Grooves are formed in the rear of the cutting blade, the bushing drive device for combines, characterized in that the rotatably inserted into the groove. delete The method of claim 1, A cutting blade driving device for combines, characterized in that the nut is fastened to the end of the first shaft to prevent the bush from being removed.

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