JP3997007B2 - Combine blade drive mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure of a combine cutting blade drive mechanism that is disposed at a front portion of a combine and drives a cutting blade of a reaping portion that raises, harvests, and conveys the cereal to a threshing portion.
[0002]
[Prior art]
Conventionally, the harvesting operation using a combine has a cutting part arranged at the front part of the machine body, and the grain of the pulling case placed at the front part of the cutting part is raised, and the pulling part is raised and arranged at the lower part behind the case. The cutting blade is cut by the cut blade, and the cut wheat straw is transported rearward and upward by the transport unit arranged at the rear part of the cutting part and delivered to the feed chain of the threshing part. ing.
[0003]
Then, the cutting blade disposed in the left and right direction of the machine body reciprocates in the left and right direction, and the receiving blade is also arranged in the left and right direction of the machine body at the lower part of the cutting blade, and rice, It is configured so as to cut off wheat and other stock sources. The driving force of the cutting blade is transmitted to the cutting crank, the rod, the cutting arm, and the knife head in order from the cutting transmission shaft arranged in the left and right direction in the cutting frame, and the reciprocation of the knife head. The cutting blade fixed to the lower part of the knife head is configured to reciprocate by movement.
[0004]
[Problems to be solved by the invention]
However, in the above prior art, crank motions such as a cutting blade, a cutting blade crank, and a cutting arm serve as a vibration source, so that vibration is increased during high-speed work, which is not suitable. In order to realize high-speed work, the W action cutting blade that reciprocates the cutting blade in the opposite direction at the same time and the opposite cutting blade method were used to cancel the vibration, but the structure became complicated. As a result, the drive unit is disposed on both the left and right sides, resulting in an increase in cost. Since the driving of the cutting blade is configured to synchronize with the vehicle speed, the reciprocating speed of the cutting blade is slow at low speeds, and the cutting performance of the scissors is not sufficient.
[0005]
[Means for Solving the Problems]
The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.
That is, a driven pulley is disposed on the upper part of the cutting blade, and the cutting blade can be driven to reciprocate via the crank mechanism from the driven pulley, and a belt is provided between the driven pulley and the driving pulley provided on the cutting frame. A cutting blade drive mechanism of a combine configured to drive the cutting blade by a belt transmission mechanism, wherein either one or both of the driving pulley and the driven pulley are configured by a split pulley, and the split pulley A continuously variable transmission mechanism is configured, and the cutting blade driving speed can be changed by the continuously variable transmission mechanism.
[0006]
The split pulley includes a fixed portion fixed to the drive shaft and a slide portion that is slidable in the axial direction of the drive shaft and rotates integrally with the drive shaft. It slid by.
[0007]
In addition, the sliding portion was driven by an actuator, and the actuator and a vehicle speed sensor were connected to a controller to control the cutting blade driving speed during low-speed traveling.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, examples of the invention will be described. 1 is an overall side view of a combine equipped with the reaping device of the present invention, FIG. 2 is also a plan view, FIG. 3 is a side view of the reaping portion, FIG. 4 is a plan view of the reaping portion, and FIG. 6 is a plan view, FIG. 7 is a side sectional view showing a continuously variable transmission mechanism of the present invention, FIG. 8 is a plan view, and FIG. 9 is an input / output showing a cutting blade drive speed control structure. 10, FIG. 10 and FIG. 11 are diagrams showing the relationship between the vehicle speed and the cutting blade driving speed, and FIG. 12 is a skeleton diagram showing the drive transmission system of the cutting unit.
[0009]
The overall structure of the combine will be described with reference to FIGS. The body frame 2 is supported on the crawler type traveling device 1, the driving unit 3 is disposed on the right front part in the traveling direction of the body frame 2, and the driving unit 3 is provided with a front column 4 standing on the front side, A steering lever, an accelerator lever, etc. are arranged on the front column 4, a side column 5 is erected on the center side of the fuselage on the side of the front column 4, and a work clutch lever, a shift lever, etc. are arranged on the side column 5. is doing.
[0010]
And the cutting part 6 protrudes and arrange | positions ahead from the left side of the advancing direction of the body frame 2, raises the culm, cuts the stock with the cutting blade 74, and conveys it back by the conveying apparatus. A threshing unit 7 is disposed at the rear of the reaping unit 6, and threshing is performed by the handling cylinder 9 while holding the cereal stocks conveyed by the conveying device between the feed chains 8 and conveying them backward. After the threshing, the waste is conveyed backward by the waste chain 17 and processed by the waste treatment device 11 such as a cutter or a binding device.
[0011]
In the lower part of the threshing section 7, a sorting device is arranged, and the second product after sorting by the sorting device is reduced again to the handling cylinder 9 or the processing cylinder, dust and the like are discharged, It is conveyed to the grain tank 13 arrange | positioned in the rear part of the driving | running | working part 3 via the mashing conveyor 12. FIG. A lower conveyor is disposed in the lower part of the grain tank 13, and the lower conveyor communicates with the discharge auger 14 so that the grains in the grain tank 13 can be discharged by driving the lower conveyor and the discharge auger 14. I have to.
[0012]
In addition, an engine 16 is disposed below the seat 15 in the driving unit 3, and travels by transmitting the driving force of the engine 16 to the crawler type traveling device 1, such as a reaping unit 6, a threshing unit 7, and a selection unit. And continuously harvesting, threshing / selecting work, and storing the grains in the glen tank 13.
[0013]
Next, the configuration of the cutting unit 6 will be described with reference to FIGS. 3, 4, and 12. A pivot fulcrum 20/21 is provided on the front part of the machine body frame 2, and an upper / lower pivot fulcrum shaft 22 formed of a pipe is pivotally supported on the upper part of the pivot fulcrum 20/21. A gear case 23 protrudes from one end of the shaft 22, a cutting input shaft (transmission 1 shaft) 19 is pivotally supported in the up-and-down rotation fulcrum shaft 22, and one end of the cutting input shaft 19 protrudes to the right in the traveling direction. Thus, the input pulley 24 is fixed, and the driving force from the engine 16 is introduced into the cutting unit 6.
[0014]
A vertical connection pipe 25 is projected in front of and below the vertical rotation fulcrum shaft 22, and a transmission 2-shaft 25 a is arranged in the vertical connection pipe 25, and between the middle part of the vertical connection pipe 25 and the body frame 2. A lifting hydraulic cylinder 26 is interposed between the cutting fulcrum shaft 22 and the cutting portion 6 so that it can rotate up and down. In addition, a horizontal pipe 30 is supported at the front end of the vertical connection pipe 25 in the left-right direction of the machine body, a cutting triaxial 30a is horizontally mounted in the horizontal pipe 30, and bevel gear cases 80 and 81 are fixed to both sides of the horizontal pipe 30. The support plates 31 and 31 are extended in front of the bevel gear cases 80 and 81, and the horizontal connection frame 32 is fixed between the front portions of the support plates 31 and 31 to support the cutting blade 74. In addition, it is raised above the right-side bevel gear case 81 and extends a driving orthogonal shaft 82 to transmit power to the raising cases 35, 35, 35 in front of the machine body.
[0015]
The cutting frames 33, 33,... Project forward from the lateral connection frame 32, and the weed plates 34, 34,. . In the rear portions of the weed plates 34, 34,..., Raised cases 35, 35, 35 are provided, and in the raised cases 35, 35, 35, tines 36, 36,. As shown in FIG. 4, in this embodiment, the chain is stored between the raising cases 35, 35, and 35 from the left side of the machine body (left side in FIG. 4). Forming part.
[0016]
Next, the structure of the conveyance part 10 located in the rear part of the cutting part 6 is demonstrated using FIG. 3 thru | or FIG. A cutting blade 74 is provided horizontally on the lower side between the rear portions of the cutting frames 33, 33, and above the cutting frames 33, 33,. 40, 40 and the take-up belts 41, 41, 41 are arranged, and the stock transportation devices 42L, 42R are arranged further upward and rearward. Above that, a left upper transfer device 43L and a left front tip transfer device 44L are arranged. In the rear part, the vertical conveying device 45 and the upper rear conveying device 46 are arranged on the machine body side. As shown in FIG. It extends for a long time.
[0017]
The upper rear conveying device 46 and the vertical conveying device 45 are rotated downward when the harvested rice, wheat, etc. are short cocoon length (hereinafter, short cocoon), and at the deepest position in the downward rotation, The front end of the trajectory of the tine 46a of the upper rear conveying device 46 and the line connecting the star wheel 40 and the rear end of the take-up belt 41 are configured to wrap in side view. Further, when the harvested rice, wheat, etc. have a long cocoon length (hereinafter referred to as “long cocoon”), they are rotated upward, and at the shallowest position in the upward rotation, the front end of the tine track of the upper rear transfer device 46 And the raising case 35 is configured to wrap in side view.
[0018]
Further, as shown in FIG. 3 and FIG. 4, the transfer device 50 is arranged at the joint portion between the raising case 35 and the upper conveying device 46, that is, at the rear position of the central raising case 35. It is installed. The transfer / conveyance device 50 has a center of the plate fixed to the drive shaft 50a, pivots a plurality of transfer / conveyance tines 50b, 50b,... At equal intervals, and transfers the transfer / conveyance tines 50b, 50b,. A guide (not shown) is fixed to the cover to be covered, and the base of the transfer and transport tines 50b, 50b,... Is guided by the guide and protrudes to the right in the traveling direction, that is, to the single cutting portion, and is stored in the cover on the left. To be. In the present invention, three transfer conveyance tines 50b, 50b and 50b are disposed around the drive shaft 50a. A flat gear 51, which is a driven gear, is fixed to the lower end of the drive shaft 50a. On the other hand, among the star wheels 40, 40, 40, the star wheel 40 located in the center in the left-right direction of the machine body is fixedly provided with a drive shaft 40a extending upward, and fixed to the upper end of the drive shaft 40a. The flat gear 40b and the flat gear 51 disposed at the lower end of the drive shaft 50a are engaged with each other.
[0019]
In this way, the drive from the engine 16 applied to the star wheel 40 is transmitted to the transfer device 50 via the drive shaft 40a, the flat gears 40b, 51 and the drive shaft 50a, so that the pair of flat gears 40b, It is possible to increase the rotation speed of the transfer and transfer device 50 by adjusting the gear ratio of 51, and to easily increase the rotation speed of the transfer and transfer tines 50b, 50b and 50b. Even during rotation, stagnation of drought due to insufficient feeding capacity can be resolved.
[0020]
Further, as shown in FIG. 4, a conveyance guide 47 is extended from the right raising case 35 to the front position of the upper rear conveyance device 46. The conveyance guide 47 passes above the scraping belt 41 and is disposed at a front position with the front end of the locus of the tine 46a of the upper rear conveyance device 46. The tine 46a of the upper rear conveyance device 46 is conveyed. It is configured to protrude from the rear position so as not to hit the guide 47, so that the cereals guided by the conveyance guide 47 can be clamped from the rear part. As a result, the cereal that has been raised and cut by the tine 36 of the right raising case 35 is conveyed to the right scraping belt 41 and is inherited by the upper rear conveying device 46 at the rear thereof. Since the wrinkle is not disturbed at the joint portion, the transfer guide 47 and the transfer device 50 transfer the cereal to the position of the tine trajectory of the upper rear transfer device 46, so that a stable transfer can be performed with a simple configuration and at a low cost. . Further, since the conveyance guide 47 is disposed, the protrusion start position of the tine 46a of the upper rear conveyance device 46 is slightly rearward than the conventional one, and the interference with the conveyance guide 47 is prevented.
[0021]
Next, the drive transmission structure of the cutting blade 74 will be described with reference to FIGS. As shown in FIG. 5 and FIG. 6, the drive perpendicular to the cutting three shaft 30 a further upwards from the right outer side than the right drive pulling drive orthogonal shaft 82 in the bevel gear case 81 provided at the right end of the horizontal pipe 30. A pulley shaft 70 extends and is supported, and power is transmitted from a bevel gear fixed to the right end of the cutting triaxial shaft 30a through a bevel gear 70b provided at the lower end of the drive pulley shaft 70. The drive pulley shaft 70 extends upward, and a drive pulley 70a is disposed slightly below the upper end.
[0022]
As shown in FIG. 7, the drive pulley 70a is composed of a split pulley composed of a sliding portion 70U and a fixed portion 70D, and the fixed portion 70D is fixed on the drive pulley shaft 70, and above it. The sliding portion 70U is slidable in the axial direction of the drive pulley shaft 70 and supported so as to rotate integrally with the drive pulley shaft 70. In this embodiment, the sliding portion 70U is splined to the drive pulley shaft 70. As shown in FIG. 7, a spring groove 60d is provided in a substantially circumferential shape on the upper surface of the fixed portion 70D, and a spring groove 60u is provided in a substantially circumferential shape on the lower surface of the sliding portion 70U. 60d and 60u are aligned from above and below, and a compression spring 61 is inserted therein to urge the sliding portion 70U to slide upward. An endless belt 78 is wound around the drive pulley 70a. In this embodiment, a V belt is used as an endless body.
[0023]
The belt 78 is wound so as to incline slightly downward toward the front, and its front end is wound around a driven pulley 72a. The driven pulley 72a is disposed substantially parallel to the drive pulley shaft 70. The driven pulley shaft 72 is fixed. In addition, a tension pulley 71a is disposed in the vicinity of an intermediate position between the driven pulley 72a and the driving pulley 70a so as to apply an appropriate tension to the belt 78 wound around the driving pulley 70a and the driven pulley 72a. It is composed. A belt cover 77 is disposed so as to cover the driving pulley 70a, the tension pulley 71a, the driven pulley 72a, and the belt 78 from above, so that dust, mud, and the like do not adhere to the driving portion such as the belt 78.
[0024]
The drive pulley shaft 70 protrudes further upward than the belt cover 77, and cams 63 </ b> D and 63 </ b> U are slidable in the axial direction of the drive pulley shaft 70 and rotate with respect to the drive pulley shaft 70. It is supported freely. The cams 63 </ b> D and 63 </ b> U are formed by vertically dividing a cylindrical shape whose center is extracted by the drive pulley shaft 70, and the cut surfaces thereof are inclined, and the cams 63 </ b> D and 63 </ b> U are arranged on the drive pulley shaft 70. It is configured not to rotate independently. A retaining ring 64 is fixed to the drive pulley shaft 70 at the upper part of the cam 63U to restrict the upward movement of the cam 63U, and the lower surface of the cam 63D and the sliding portion 70U of the drive pulley 70a are restricted. A thrust bearing 62 is disposed therebetween, and the cam 63D is pressed upward by the elastic force of the compression spring 61.
[0025]
Further, a rotating arm 65 fixed to one cam 63U (or cam 63D) extends in a direction perpendicular to the drive pulley shaft 70, and rotatably supports the link 66 at its end. The link 66 extends toward the rear of the machine body, and is supported at its end by a speed adjustment arm 67 so that the rotation arm 65, the link 66, and the speed adjustment arm 67 are arranged in substantially the same plane. Yes. The other cam 63D is fixed to the cutting frame side.
The speed adjusting arm 67 is rotated by obtaining a driving force from an actuator (not shown) such as a motor, a solenoid, or a cylinder, and constitutes a continuously variable transmission mechanism 68 together with the cams 63U and 63D. However, the sliding portion 70U can also be configured to be directly slid and driven by an actuator.
[0026]
Then, the speed adjustment arm 67 is rotated in the direction of arrow A in FIG. 8 by the driving force from the actuator, and the rotation arm 65 is rotated in the direction of arrow B via the link 66. The cam 63U is also rotated in the direction of arrow B by the rotation of the rotation arm 65. However, since the cut surfaces of the cam 63U and the cam 63D are inclined as described above, the cam 63U whose upward movement is restricted. Presses the cam 63D downward. As a result, the sliding portion 70U of the drive pulley 70a is pressed downward via the thrust bearing 62, and the sliding portion 70U moves downward to a position where the elastic force of the compression spring 61 is maintained in equilibrium. By the sliding of the sliding portion 70U, the belt 78 can move to the outer peripheral side of the driving pulley 70a to increase the speed of the driven pulley 72a.
[0027]
The split pulley type continuously variable transmission mechanism 68 is configured as described above, adjusts the position of the sliding portion 70U, and changes the distance between the sliding portion 70U and the fixed portion 70D, so that the belt 78 is in contact with the driving pulley. The radius of 70a is increased / decreased, and a difference in rotational speed between the driving pulley 70a and the driven pulley 72a is generated steplessly.
Further, in this embodiment, the continuously variable transmission is performed using the drive pulley 70a as the split pulley, but it is also possible to perform the continuously variable transmission using the driven pulley 72a as the split pulley. It is also possible to use a configuration in which the pulleys 70a and 72a are used as split pulleys for continuously variable transmission, and in this case, a larger shift can be obtained.
[0028]
On the other hand, a crank plate 72b is fixed to the lower end of the driven pulley shaft 72. The crank plate 72b has a substantially rectangular shape and extends in a direction orthogonal to the driven pulley shaft 72. A crank shaft 72c protrudes downward from an end portion of the crank plate 72b. The crankshaft 72c is substantially parallel to the driven pulley shaft 72 and protrudes downward. The lower end of the crankshaft 72c protrudes into a substantially rectangular crank groove 73a provided in the knife head 73 from above. In this way, the crank mechanism is configured. As shown in FIG. 7, the knife head 73 has a substantially trapezoidal shape, and is provided with a crank groove 73c from the rear part toward the center. A cutting blade 74 is mounted.
[0029]
The cutting blade 74 is disposed below the knife head 73 in the left-right direction of the machine body, and the cutting blade 74 is integrally formed with the knife head 73 and a bolt or the like. A receiving blade 75 is disposed in the lower side of the machine blade 74 in the left-right direction of the machine body, and a stock of rice, wheat, etc. is formed by the receiving blade 75 and the cutting blade 74 reciprocating in the left-right direction at the upper portion thereof. Disconnect.
[0030]
In the drive transmission configuration of the cutting blade 74 configured as described above, the driving force of the engine 16 is transmitted to the drive pulley shaft 70 via the transmission 1 shaft 19, the transmission 2 shaft 25a, and the cutting 3 shaft 30a. The rotational driving force of the driving pulley 70a is transmitted to the driven pulley 72a via the belt 78, and the crank plate 72b and the crank shaft 72c fixed to the lower end of the driven pulley shaft 72 of the driven pulley 72a are connected to the driven pulley shaft 72. Rotate to the center. As a result, the crankshaft 72c moves circularly around the driven pulley shaft 72. As described above, since the lower end of the crankshaft 72c is inserted into the crank groove 73a of the knife head 73, the circular movement of the crankshaft 72c. Tries to push the inner wall of the crank groove 73a in the rotational direction. However, since the knife head 73 is integrally fixed to the lower cutting blade 74, and the cutting blade 74 is supported so as to be slidable only in the left-right direction of the machine body, the circular motion of the crankshaft 72c is moved in the left-right direction. Converting to reciprocating motion, the cutting blade 74 reciprocates in the left-right direction integrally with the knife head 73.
[0031]
Since the driving of the cutting blade 74 described above is synchronized with the traveling speed, the cutting speed of the cutting blade 74 (the reciprocating speed of the cutting blade 74) is slow when the traveling speed is low. Therefore, the rotational speed of the driven pulley 72a is increased or decreased by adjusting the radius of the driving pulley 70a with respect to the belt 78 by the continuously variable transmission mechanism 68 described above. As a result, even when the engine 16 rotates at a low speed, the cutting speed of the cutting blade 74 can be increased to improve the cutting performance of the scissors. Further, since the driving speed of the cutting blade 74 can be steplessly changed by the continuously variable transmission mechanism 68, the clogging of the scissors can be prevented and the impact on the components such as the cutting blade 74 can be reduced by a smooth shifting operation. You can also.
[0032]
Further, as shown in FIG. 9, a cutting position sensor 91, a vehicle speed sensor 92, a cutting switch 93, and an actuator 94 are connected to the controller 90, and the cutting blade driving speed is adjusted from the output value calculated by the controller 90. It is said. First, when a cutting drive start command is input from the cutting switch 93, the controller 90 determines whether cutting driving can be started from the input value of the cutting position sensor 91. If the cutting position is in a state where cutting is possible (that is, the cutting position is not at the uppermost position), the controller 90 outputs a cutting drive start command.
[0033]
The controller 90 that has output the cutting drive start command subsequently detects the vehicle speed 98 from the vehicle speed sensor 92, and the cutting blade drive speed 99 is such that the relationship between the vehicle speed 98 and the cutting blade drive speed 99 is the curve 96 in FIG. The value is output to the actuator 94. (In FIGS. 10 and 11, the vehicle speed 98 rises in the right direction with the left end set to 0, and the cutting blade drive speed 99 rises upward with the lower end set to 0.) The rotational displacement of 67 is adjusted, and the radius of the drive pulley 70a, which is a split pulley, with respect to the belt 78 is controlled via the link 66 and the rotational arm 65. As a result, the cutting blade driving speed 99 is higher than the straight line 95 indicating a proportional relationship with the conventional vehicle speed 98, and the cutting blade driving speed 99 at a low vehicle speed is high, and cutting performance is improved. Then, as the vehicle speed 98 rises, it approaches the straight line 95 that is the relationship between the conventional vehicle speed 98 and the cutting blade drive speed 99.
[0034]
As shown in FIG. 11, if the cutting blade driving speed 99 at a low vehicle speed is set to increase at a stretch, a stable cutting blade driving speed 99 can be obtained immediately after the start of the work, and problems such as uncut cutting of the scissors can be obtained. It can be solved.
[0035]
Further, as shown in FIG. 6, the drive pulley shaft 70 is arranged so as to be located on the outer side of the machine body from the drive orthogonal shaft 82. Similarly, the drive pulley shaft 70 is raised on the left side of the machine body and is orthogonal. It is also possible to adopt a configuration in which a belt drive unit is disposed outside the belt drive unit and a continuously variable transmission mechanism is disposed in the belt drive unit, and the same effect as the above-described configuration can be obtained.
[0036]
As described above, the harvesting and transporting process in the transporting unit 10 configured as described above is performed first at the front end of the cutting unit 6 by the weeding boards 34, 34... The scissors are gripped by the tines 36, 36,... Of the respective raising cases 35, 35, 35 and conveyed upward. Then, when the stock portion reaches the position of the cutting blade 74, the stock is cut by the left and right reciprocating motion of the cutting blade 74 and the receiving blade 75 disposed in the lower portion, and the harvested cereal is transferred to the conveying unit 10. To reach. Then, the cereal is transported rearward by the stock transporter 42L and 42R, the upper part is transported rearward by the upper transporter 43L and the upper rear transporter 46, and the tip portion is transported by the front tip. It is conveyed by the device 44L.
[0037]
In this way, the stock source side of the cereals conveyed by the stock transport device 42L and 42R is inherited by the vertical transport device 45, and the upper transport device 43L, the upper rear transport device 46, and the forehead transport device 44L and 44R. The tip side conveyed by the above is inherited by the upper rear conveying device 46, and the stock side of the cereal is further inherited by the feed chain 8 and conveyed to the threshing unit 7.
[0038]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained. That is, a driven pulley is disposed on the upper part of the cutting blade, and the cutting blade can be driven to reciprocate via the crank mechanism from the driven pulley, and a belt is provided between the driven pulley and the driving pulley provided on the cutting frame. A cutting blade drive mechanism of a combine configured to drive the cutting blade by a belt transmission mechanism, wherein either one or both of the driving pulley and the driven pulley are configured by a split pulley, and the split pulley Since the cutting blade drive speed can be changed by the continuously variable transmission mechanism, the rotational speed of the driven pulley can be increased or decreased by adjusting the radius of the split pulley relative to the belt. By increasing the driving speed of the cutting blade even during low-speed traveling, the cutting performance of the scissors can be improved, and the stock can be reliably cut to prevent clogging and the like. In addition, since the cutting blade drive speed can be changed steplessly, it is possible to prevent clogging by a smooth shifting operation and to reduce the impact on components such as the cutting blade.
[0039]
The split pulley includes a fixed portion fixed to the drive shaft and a slide portion that is slidable in the axial direction of the drive shaft and rotates integrally with the drive shaft. Because of this, we adjusted the radius of the belt with a simple configuration and realized a continuously variable transmission mechanism. It is possible to convert the rotational movement of the cam into the sliding movement of the split pulley with a simple configuration, and a low-cost and stable continuously variable transmission mechanism can be realized.
[0040]
In addition, the sliding part is driven by an actuator, and the actuator and vehicle speed sensor are connected to a controller so that the cutting blade driving speed is controlled to increase during low-speed traveling, so that the cutting driving speed is synchronized with the traveling speed. In the combined combine, even during low-speed traveling, the cutting drive speed can be controlled to be substantially constant, the cutting performance during low-speed traveling does not deteriorate, and the stock of the cereal is reliably cut, Even if there is a large amount of cereal, it can be cut.
[Brief description of the drawings]
FIG. 1 is an overall side view of a combine equipped with a cutting device of the present invention.
FIG. 2 is an overall plan view of a combine equipped with the reaping device of the present invention.
FIG. 3 is a side view of a cutting part.
FIG. 4 is a plan view of a cutting part.
FIG. 5 is a side cross-sectional view of the belt driving unit of the present invention.
FIG. 6 is a plan view of a belt driving unit according to the present invention.
FIG. 7 is a side sectional view showing a continuously variable transmission mechanism of the present invention.
FIG. 8 is a plan view showing a continuously variable transmission mechanism according to the present invention.
FIG. 9 is an input / output diagram showing a control structure of a cutting blade driving speed.
FIG. 10 is a diagram showing a relationship between a vehicle speed and a cutting blade driving speed.
FIG. 11 is a diagram showing a relationship between a vehicle speed and a cutting blade driving speed.
FIG. 12 is a skeleton diagram showing a drive transmission system of a cutting unit according to the present invention.
[Explanation of symbols]
6 Cutting part 61 Compression spring 62 Thrust bearing 63U Cam 63D Cam 64 Retaining ring 65 Rotating arm 66 Link 67 Speed adjusting arm 68 Stepless speed change mechanism 70 Drive pulley shaft 70a Drive pulley 70U (Drive pulley) Slide part 70D (Drive pulley) ) Fixed part 71a Tension pulley 72 Driven pulley shaft 72a Driven pulley

Claims (3)

A driven pulley is arranged on the upper part of the cutting blade, and the cutting blade can be driven to reciprocate from the driven pulley via a crank mechanism, and a belt is wound between the driven pulley and a driving pulley provided on the cutting frame. A combine cutting blade drive mechanism configured to rotate and drive the cutting blade by a belt transmission mechanism , wherein either one or both of the driving pulley and the driven pulley are configured by a split pulley, and the split pulley type A combine cutting blade drive mechanism comprising a step transmission mechanism, wherein the cutting blade drive speed can be changed by the continuously variable transmission mechanism . The split pulley is composed of a fixed portion fixed to the drive shaft and a slide portion that is slidable in the axial direction of the drive shaft and rotates integrally with the drive shaft. 2. The combine cutting blade drive mechanism according to claim 1, wherein said combine cutting blade drive mechanism is slid. The combine cutting blade drive mechanism according to claim 2, wherein the sliding portion is driven by an actuator, the actuator and a vehicle speed sensor are connected to a controller, and control is performed to increase the cutting blade drive speed during low-speed traveling. .

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