JP2007159466A - Reaping part driving mechanism of combine harvester - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reaping part driving mechanism formed to connect a reaping part having a hair clipper-type reaping device, a crossfeed auger and a raking-in reel to the front end of a feeder connected to the front part of a thresher and to conjunctively connect a feeder driving shaft laterally spanned on the base part of the feeder with a counter shaft laterally spanned at the rear of the reaping part so that the power transmitted to the counter shaft is divided to the hair clipper-type reaping device, the crossfeed auger and the raking-in reel, wherein the driving system of the reaping device is simplified, no specific maintenance is required and the driving mechanism is accurately driven. <P>SOLUTION: A rotation converter 70 converting rotation of a transverse axis of a counter shaft 65 to reciprocating motion around a longitudinal axis is set on the counter shaft 65, a transmitting shaft 74 for transmitting the converted reciprocating motion power is extended frontward, and the front part of the transmitting shaft 74 is conjunctively connected with the reaping device 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  According to the present invention, a front end of a feeder connected to a front portion of a threshing apparatus is connected with a clipper type mowing device, a transverse feed auger, and a mowing portion provided with a scraping reel, and the base end portion of the feeder A feeder drive shaft that is horizontally mounted on the counter shaft and a counter shaft that is horizontally mounted on the front portion of the feeder are linked to each other, and the power transmitted to the counter shaft is branched and transmitted to the mowing device, the auger, and the take-up reel. The present invention relates to a cutting unit driving structure in a normal type combine combiner.

For example, as disclosed in Patent Document 1, the power taken out from the counter shaft mounted horizontally on the back of the mowing unit is disposed in the vicinity of the side of the mowing device. It is known that the cutting blade driving case is transmitted to the cutting blade drive case via a belt, and the cutting blade driving case and the cutting device are interlocked and connected, and the auger and the scraping reel are driven by the power extracted from the counter shaft. Yes.
JP-A-2005-211010

  In the above-described conventional structure, the belt transmission mechanism that interlocks and connects the counter shaft and the cutting blade drive case is provided on the lateral outer side of the cutting unit, so that a lot of parts are required for the cutting device drive system and the cost is high. . In addition, because of friction transmission via the transmission belt, there is a risk of transmission slip due to wear or elongation of the transmission belt, which may reduce the cutting performance of the mowing device, and the transmission belt must be sufficiently maintained. was there.

  The present invention has been made paying attention to such points, and can simplify the drive system of the mowing device, and can accurately drive the mowing device without requiring special maintenance. The purpose is to do.

According to a first aspect of the present invention, a front end of a feeder connected to a front portion of a threshing apparatus is connected with a clipper type mowing device, a transverse auger, and a mowing portion provided with a scraping reel. The feeder drive shaft horizontally mounted on the end and the counter shaft horizontally mounted on the front of the feeder are linked and linked, and the power transmitted to the counter shaft is branched and transmitted to the mowing device, the auger and the scraping reel. In the combine harvester drive structure configured to
The counter shaft is equipped with a rotation conversion mechanism for converting the rotation of the counter axis of the counter shaft into the reciprocating rotation around the front and rear axis, and the transmission shaft for transmitting the converted reciprocating power is directed forward. The front end portion of the transmission shaft and the mowing device are interlocked and connected.

  According to the above configuration, the swing shaft is attached to the front end portion of the transmission shaft that reciprocally rotates around the longitudinal axis, and the swing arm that is reciprocally swung is coupled to the cutting blade in the mowing device, whereby the counter shaft The cutting blade can be reciprocally driven with a predetermined stroke in conjunction with the rotation of. In this case, since there is no friction transmission part in the transmission system from the counter shaft to the cutting device, the cutting device can be driven without slipping.

  Therefore, according to the first invention, the transmission system from the counter shaft to the cutting device can be simplified as compared with the case of belt transmission, the cost of the transmission structure can be reduced, and special maintenance can be performed. The cutting device can be surely driven without any need.

According to a second invention, in the first invention,
The counter shaft and the auger drive shaft are wound and connected in an interlocking manner, and the power branched from the auger drive shaft is transmitted to the scraping reel.

  For example, assuming that the power branched from the counter shaft is transmitted to the scraping reel, three power branch portions for driving the mowing device, for driving the auger, and for driving the scraping reel are used as counter shafts on the lateral side of the cutting portion. The countershaft cantilevered length increases and a large bending load is likely to be applied, and the countershaft needs to have a larger shaft diameter. Only needs to provide two power branch points for driving the mowing device and for driving the auger, and it is not necessary to make the cantilever protrusion length of the counter shaft particularly long. Therefore, the bending load on the counter shaft is reduced, and the counter shaft can be of a small diameter that can transmit the required torque.

According to a third invention, in the first or second invention,
A belt transmission means is interposed in the transmission system to the scraping reel, and the belt transmission means is provided with a transmission pulley that performs winding transmission with different transmission ratios, and shifts by changing the transmission belt to the transmission pulley. It is comprised as follows.

  According to the above configuration, the speed change structure of the scraping reel can be configured at low cost.

  FIG. 1 shows an entire side surface of a normal combine according to the present invention, and FIG. 2 shows an entire plane thereof. In this combine, a traveling machine body 2 having a pair of left and right crawler traveling devices 1 is provided with an axial flow type threshing device 3 and a bag-packing type grain collection unit 4 arranged in parallel on the left and right sides, and grain collection. A driving unit 5 is provided in front of the unit 4. The front part of the threshing device 3 is connected to a feeder 6 for conveying the harvested cereal rice cake so as to swing up and down around the fulcrum P. The engine 8 is connected to the lower side of the operation unit 5 in a lateral direction.

  A hydraulic cylinder 9 is installed between the front part of the traveling machine body 2 and the lower part of the feeder 6, and the cutting part 7 swings up and down around the fulcrum P integrally with the feeder 6 by the expansion and contraction operation of the hydraulic cylinder 9. It has become. Above the front part of the mowing unit 7, a scraping reel 10 for scraping and raising the planted cereals backward is provided.

  The mowing unit 7 includes a pair of left and right weeding frames 11 configured in a vertical wall shape, a clipper-type mowing device 12, an auger 13 for laterally feeding the harvested crop to the middle of the mowing width, and left and right weeding frames 11 The conveyance deck 14 which connects the lower parts of each is provided. The feeder 6 is configured by accommodating a scraping conveyor 16 inside a cylindrical conveyance case 15 penetrating in the front-rear direction. The scraping conveyor 16 is configured by horizontally connecting a transport bar 16b across left and right chains 16a that are wound in a vertical direction, and the cereals that are laterally fed by the auger 13 are formed on the bottom surface of the transport case 15. The threshing device 3 is then scraped and conveyed along the front end of the threshing device 3.

  The auger 13 is provided with left and right screws 18 for laterally feeding the harvested cereal toward the front end inlet of the feeder 6 on the outer periphery of an auger drum 17 that is rotationally driven in a fixed direction from the front to the bottom. The outer periphery of the drum facing the entrance has a structure in which four pairs of left and right scraping fingers 19 that move back and forth as the drum rotates are equipped at four locations in the circumferential direction. 14 is configured to be fed to the front end inlet of the feeder 6 by the feed finger 19 by being fed laterally to the middle of the cutting width along 14.

  Auxiliary scraping fingers 20 that operate in the lateral feed working area by the right screw 18 are separately provided at a position on the outer peripheral right side of the auger drum 17, and the auger 13 is separated from the front end inlet of the feeder 6 in the lateral direction. The cereals that have fallen into the transport deck 14 in the front are raked into the lateral feed action area of the screw 18 by the auxiliary take-up fingers 20, and are sent to the action area of the rake finger 19 under the lateral feed action of the screw 18. It has become.

  As shown in FIG. 4, the take-up reel 10 is pivotally supported via a support bracket 22 at the front part of a pair of left and right support arms 21 that can swing up and down around a base end fulcrum a. By swinging the support arm 21 up and down, it is possible to change the level of the scraping action of the scraping reel 10, and by adjusting the slide of the support bracket 22 along the support arm 21, It is possible to adjust to. As shown in FIGS. 8 and 9, the support bracket 22 is manually slid and adjusted, and the connection pins 26 are inserted into the connection holes 24 provided in the support bracket 22 and the connection holes 25 provided at a plurality of positions before and after the support arm 21. It is fixed by doing.

  The take-up reel 10 includes a reel drive shaft 31 horizontally supported on left and right support arms 21 via a support bracket 22, a regular pentagonal reel frame 32 connected and fixed to the left and right of the reel drive shaft 31, Tine mounting shaft 33 that is horizontally supported so as to be rotatable over the tops of five portions of the reel frame 32, a plurality of scraping tines 34 that are mounted in parallel to the tine mounting shaft 33, and the drive axis of the reel frame 32. and a regular pentagonal auxiliary reel frame 35 that is supported so as to be rotatable about an eccentric axis c that is shifted rearward with respect to b. The tip of the rotation restricting arm 33a fixed and extended toward the top is pivotally connected to each top of the auxiliary reel frame 35, and the reel frame 32 is centered on the drive axis b. When it rotates (revolves), the auxiliary reel frame 35 follows and rotates in synchronization with the eccentric shaft center c in association with this, whereby each tine mounting shaft 33 rotates in the reel rotation direction with respect to the reel frame 32. The tine 34 of each tine mounting shaft 33 is always maintained in a downward posture and revolves and exhibits a scraping action.

  Next, the transmission structure to each part is demonstrated.

  As shown in FIG. 3, the power from the engine 8 is divided into a traveling system and a working system, and the power of the traveling system is transmitted to the main transmission mechanism 41 via a belt tension type main clutch 40. The main transmission mechanism 41 is constituted by a hydraulic continuously variable transmission (HST), and forward (forward) or reverse (reverse) transmission power extracted from the main transmission mechanism 41 is input to the mission case 42. . The power input to the mission case 42 is shifted to a high and low level by a gear-type sub-transmission mechanism 43 and then transmitted to the left and right crawler travel devices 1 via a pair of left and right side clutches 44.

  The side clutch 44 is linked to a control lever 45 provided at the front portion of the driving unit 5. When the control lever 45 is in the left-right neutral position, the left and right side clutches 44 are both “on” and travel straight ahead. When the control lever 45 is operated leftward or rightward, the operated side clutch 44 becomes “disengaged” and the traveling body 2 is driven by only the crawler traveling device 1 on one side. Turn in 45 operating directions. A side brake 46 is linked to the side clutch 44, and when the operation lever 45 is further tilted after the side clutch 44 is turned off, the side brake 46 on the side where the side clutch 44 is turned off is activated, Brake is applied to the crawler traveling device 1 whose drive is cut off, and the aircraft is steered by pivoting. The control lever 45 is configured to be able to perform a cross operation in front, rear, left, and right. The forward operation of the hydraulic cylinder 9 shortens and the cutting portion 7 descends, and the rear operation of the hydraulic cylinder 9 extends and operates. The control lever 45 and a control valve (not shown) of the hydraulic cylinder 9 are linked so that the cutting unit 7 is raised.

  The power of the work system branched off from the engine power is transmitted to the tang shaft 52 which is the input shaft of the threshing device 3 through the transmission belt 51 on which the belt tension type threshing clutch 50 acts. The power transmitted to the tang shaft 52 is further divided into two systems on the left side of the machine body, and one branch power is provided in the threshing device 3 for the first screw feed 53 for the first feed and the second feed for the second feed. Of the bevel gear case 57 provided to the front portion of the threshing device 3 while being transmitted to the second screw shaft 54 and the swing sorting case drive shaft 55, etc., via the transmission belt 56. The handling cylinder 60 is driven by the power transmitted to the input shaft 59 via the transmission belt 58 and changed in direction by the bevel gear case 57.

  The input shaft 59 of the bevel gear case 57 and the feeder drive shaft 61 horizontally mounted on the base end of the feeder 6 are interlocked with each other via a transmission belt 63 on which a belt tension type mowing clutch 62 acts. The scraping conveyor 16, the auger 13, the mowing device 12, and the take-up reel 10 are driven by the transmitted power as follows.

  A counter shaft 65 is horizontally supported on the right side of the back portion of the cutting portion 7, and the left end portion of the counter shaft 65 and the right end portion of the feeder drive shaft 61 are interlocked and connected via a chain 66, and the right end of the counter shaft 65 is also connected. The auger drive shaft 67 projecting to the right side of the cutting portion 7 and the cutting portion 7 are interlocked and connected via a chain 68.

  In the vicinity of the right end of the counter shaft 65, a rotation conversion mechanism 70 that converts the rotation of the counter shaft 65 around the horizontal axis to the reciprocating rotation around the front-rear axis is provided. As shown in FIG. 6, the rotation conversion mechanism 70 has an inclined boss 72 mounted on an inclined head 71 connected to the counter shaft 65 so as to be rotatable around the inclination axis d so as to be freely rotatable. The transmission shaft 74 is connected to a pair of fulcrum pins 72 a provided at the outer peripheral diagonal position via a yoke 73. As the counter shaft 65 rotates about the lateral axis, the tilt axis d of the tilt boss 72 is swung in the forward and reverse directions, and is linked to the tilt boss 72 via the fulcrum pin 72 a and the yoke 73. The transmission shaft 74 is reciprocally rotated at a predetermined angle.

  As shown in FIG. 4, the transmission shaft 74 extends forward and downward along the outer surface of the right weed frame 11, and the swinging arm 75 connected to the front end of the transmission shaft 74 and the mowing device 12. Are connected to each other via a relay link 75a, and the cutting blade 12a of the reaping device 12 is reciprocally driven left and right with a fixed stroke by the reciprocating rotation of the transmission shaft 74.

  On the right side of the base of the support arm 21 equipped with the take-up reel 10, a relay shaft 81 is provided concentrically with the base end fulcrum a of the support arm 21, and the relay shaft 81 and the auger drive shaft 67 are connected via a chain 82. The relay shaft 81 and the reel drive shaft 31 are interlocked and connected via a transmission belt 83 while being interlocked and connected. As shown in FIGS. 8 and 9, the relay shaft 81 is equipped with a large-diameter transmission pulley 84a and a small-diameter transmission pulley 84b in parallel, whereas the reel drive shaft 31 has a single passive pulley 85. By changing the transmission belt 83 to one of the transmission pulleys 84a and 84b, the rotational speed of the take-up reel 10 can be shifted in two steps.

  The installation position of the passive pulley 85 in the axial direction is set so as to correspond to the left and right intermediate positions of the transmission pulleys 84a and 84b arranged in parallel, and the transmission belt 83 is selected regardless of which transmission pulley 84a or 84b is selected. Is wound in a slightly twisted state.

  A pair of tension rollers 87 mounted on a tension arm 86 that is urged and oscillated around a fulcrum e and is capable of oscillating a balance acts on the slack side path of the transmission belt 83. By bending and winding 83, proper belt tension is performed regardless of the change of the front-rear position of the scraping reel 10.

[Other Examples]
(1) In the drive-in reel drive structure, the passive pulley 85 is pin-coupled so that the position of the passive pulley 85 can be changed with respect to the reel drive shaft 31 corresponding to the position of the transmission pulleys 84a and 84b in the axial direction. It can also be configured so that it is wound in a state where there is not.

  (2) A pair of passive pulleys 85 opposed to the transmission pulleys 84a and 84b may be mounted in parallel on the reel drive shaft 31 so that the transmission belt 83 is wound without being twisted.

Combine side view Overall plan view of combine Transmission system diagram Side view of the cutting part Front view showing a part of a scraping reel Longitudinal rear view of rotation conversion mechanism Front view of cutting blade drive structure Plan view of scraping reel speed change structure Side view of scraping reel speed change structure

Explanation of symbols

DESCRIPTION OF SYMBOLS 3 Threshing apparatus 6 Feeder 7 Cutting part 10 Scraping reel 13 Auger 61 Feeder drive shaft 65 Counter shaft 67 Auger drive shaft 70 Rotation conversion mechanism 74 Transmission shaft 83 Transmission belt 84a Transmission pulley 84b Transmission pulley

Claims (3)

The front end of the feeder connected to the front part of the threshing device is connected with a clipper type mowing device, a transverse auger, and a mowing unit equipped with a scraping reel, and is horizontally mounted on the base end of the feeder. A combiner configured to link and transmit the power transmitted to the counter shaft to the mowing device, the auger and the take-up reel. In the cutting part drive structure,
The counter shaft is equipped with a rotation conversion mechanism for converting the rotation of the counter axis of the counter shaft into the reciprocating rotation around the front and rear axis, and the transmission shaft for transmitting the converted reciprocating power is directed forward. A combine harvester drive structure for a combine, wherein a front end portion of the transmission shaft and the harvesting device are interlocked and connected.   2. The combine harvester drive structure according to claim 1, wherein the counter shaft and the auger drive shaft are wound and interlocked to each other, and the power branched from the auger drive shaft is transmitted to the scraping reel.   A belt transmission means is interposed in the transmission system to the scraping reel, and the belt transmission means is provided with a transmission pulley that performs winding transmission with different transmission ratios, and the transmission pulley is shifted by changing the transmission belt. The combine harvester drive structure according to claim 1 or 2, wherein the combine harvester drive structure is configured.

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