JP4537787B2 - Mowing blade drive device for harvesting machine - Google Patents

Description

  The present invention relates to a drive-rotating cutting blade drive shaft that is rotatably supported by a cutting blade drive case, and to a cutting blade driving portion of a reaping device that is connected to the cutting blade drive shaft so as to be integrally rotatable. The present invention relates to a cutting blade driving device for a harvesting and harvesting machine including a rotary crank that reciprocally drives a movable cutting blade.

  As the above-mentioned cutting blade driving device, conventionally, as shown in Patent Document 1, for example, a bevel gear case 37 (corresponding to a cutting blade driving case), a cutting blade driving shaft 45, and a knife head 47 (moving blade driving portion) of a movable blade 82 are used. Equivalent) has a crank 46 engaged with a bearing 84 (corresponding to a rotating crank).

Japanese Patent Laid-Open No. 10-164952 (stages [0028] and [0034], FIG. 6)

  In the above-mentioned cutting blade driving device, the cutting blade driving shaft and the rotating crank are separately manufactured. Therefore, conventionally, when the cutting blade driving shaft and the rotating crank are assembled to the cutting blade driving case, they integrally rotate. It was welded so that it could be connected freely. For this reason, by applying induction hardening to the cutting blade drive shaft and providing a seal material between the cutting blade drive shaft and the cutting blade drive case, a seal that makes it difficult for dust to enter the cutting blade drive case is obtained by welding. This was done in a state where seal failure was unlikely to occur. As a result, the cost is increased due to the surface finishing and quenching of the cutting blade drive shaft.

  An object of the present invention is to provide a cutting blade drive device for a harvesting harvester that can be obtained at low cost while being able to satisfactorily seal the inside of the cutting blade drive case and preventing an increase in the length of the cutting blade drive shaft. Is to provide.

According to the first aspect of the present invention, a drive-rotating cutting blade driving shaft that is rotatably supported by the cutting blade driving case, and a cutting blade of the reaping device that is connected to the cutting blade driving shaft so as to be integrally rotatable. In the cutting blade drive device of the harvesting and harvesting machine provided with a rotating crank that reciprocally drives the movable cutting blade by engaging with the blade driving unit,
The cutting blade drive case is provided with a cylindrical portion that protrudes the cutting blade drive shaft from the cutting blade drive case and supports the cutting blade drive shaft.
An annular recessed portion positioned on the outer peripheral side of the connection boss portion is formed toward the tube portion of the cutting blade drive case so as to form a connection boss portion fitted on the cutting blade drive shaft of the rotary crank into a cylindrical shape. Provided in the rotating crank in an open state,
Engagement of the projections one has the rotating crank and the cutting blade drive shaft, said rotational crank by engagement by a recess and the other has engaged freely detachably and integrally rotated with respect to the cutting blade drive shaft the coupling means comprises over said coupling boss portion in the rotating crank and the cutting blade drive shaft, comprising a stopper means for the latch of the rotary crank to stop wearing the rotary crank with respect to the cutting blade drive shaft ,
An end portion of the cylindrical portion of the cutting blade driving case facing the rotating crank is inserted into the recessed portion of the rotating crank and the end portion of the cylindrical portion of the cutting blade driving case and the connecting boss of the rotating crank. between the parts is provided with a bushing interposed between said cutting sealing means for sealing action with respect to the blade drive case, and the sealing means and the coupling boss.

  That is, since the cutting blade drive shaft and the rotating crank are connected to each other by the engaging means so as to be rotatable together, and the stopper means is prevented from coming off, adverse effects due to the connection between the cutting blade driving shaft and the rotating crank are not generated in the seal portion. First, the cutting blade drive shaft and the rotating crank are rotated together while ensuring the specified sealing accuracy without taking special measures to ensure the sealing accuracy, such as induction hardening of the cutting blade drive shaft. Can be connected so as not to come off.

When the sealing means interposed between the cutting blade drive shaft and the cutting blade drive case is employed, it is necessary to provide the cutting blade drive shaft with a portion dedicated to the sealing means to which the sealing means is attached. Since the sealing means is interposed between the connecting boss portion of the rotating crank and the end portion of the cylindrical portion of the cutting blade drive case, it is necessary to provide the cutting blade drive shaft with a portion dedicated to the sealing means to which the sealing means is mounted. Therefore, the sealing means can be mounted while shortening the cutting blade drive shaft accordingly.

  Therefore, according to the first aspect of the present invention, it is possible to seal with the sealing means so that dust does not easily enter the inside of the cutting blade drive case, but it eliminates the need for special measures for ensuring the sealing accuracy. The cutting blade drive shaft can be made as short as possible and the length of the cutting blade drive shaft protruding from the cutting blade drive case can be made as short as possible.

Furthermore, even if the surface finish of the connecting boss portion of the rotary crank is not particularly performed, the sealing accuracy between the connecting boss portion and the sealing means is improved by the bush, and the sealing accuracy of the cutting blade drive case can be ensured.

Therefore, according to the first aspect of the present invention, the cutting blade drive case can be sealed with high accuracy, but the surface finish of the connecting boss portion is not required and can be obtained at low cost from this surface.

  As shown in FIG. 1, the propeller 4 as shown in FIG. 2 is cut by a crawler-type traveling device 1 that is self-propelled and located at the front of the body frame 3 of the self-propelled aircraft equipped with the riding-type driving unit 2. The base part of the pre-processing part frame 11 of the pre-processing part 10 is rotatably connected, and a lift mechanism 5 having a lift cylinder 5a is provided at the front part of the body frame 3, and threshing is performed on the rear side of the body frame 3 The apparatus 6 and the grain tank 7 are provided, and the combine which harvests rice and wheat is comprised.

  That is, when the lift cylinder 5a is expanded and contracted, the lift mechanism 5 swings the pretreatment unit frame 11 up and down with respect to the machine body frame 3 by the operation force of the lift cylinder 5a, and the cutting pretreatment unit 10 is moved to the weeding tool 12 or the like. Is moved up and down into a descending working state where the tool is positioned near the ground, and a lifting non-working state in which the weeding tool 12 and the like are elevated from above the ground. When the pre-cutting processing unit 10 is in the descending work state and the self-propelled machine is traveling, the pre-cutting processing unit 10 uses the weeding tool 12 to split the planted cereals into a cutting target and a non-cutting target. The planted culm to be reaped from the tool 12 is raised and processed by the device 13 and processed by the reaping device 20, and the reaped cereal from the reaping device 20 is conveyed backward by the supply device 30. The threshing device 6 is fed to the starting end of the threshing feed chain 6a. The threshing device 6 supplies the tip side to a handling room (not shown) while squeezing and conveying the stock side of the harvested cereal rice cake in the rear direction of the machine body by the threshing feed chain 6a, and performs the threshing process. The grain tank 7 collects and stores the threshing grains from the threshing device 6.

  As shown in FIGS. 4 and 6, the cutting device 20 is a fixed cutting blade fixed to the upper surface side of a cutting blade base 21 supported by a plurality of weeding frames 14 arranged in the horizontal direction of the machine body of the pre-cutting processing unit 10. 22, a movable cutting blade 23 provided on the upper surface side of the fixed cutting blade 22, a knife clip 24 made of a spring plate fixed to a plurality of positions of the cutting blade base 21 in the lateral direction of the machine body, and the like. It is a clipper type mowing device.

  The fixed cutting blade 22 is configured by connecting a plurality of fixed cutting blade pieces 22 a arranged in the longitudinal direction of the fixed cutting blade 22 by the cutting blade base 21 in the lateral direction of the machine body. The movable cutting blade 23 is configured by connecting a plurality of movable cutting blade pieces 23 a arranged in the longitudinal direction of the movable cutting blade 23 in the horizontal direction of the machine body by a connecting bar (not shown). A cutting blade driving unit 26 provided with a knife head fixed to the upper surface side of a portion slightly closer to one end side than the center in the longitudinal direction of the movable cutting blade 23 via a connecting plate 25 is provided on the rear side of the body of the reaping device 20. It is engaged with the rotary crank 41 of the cutting blade drive device 40 located at the position.

  In other words, the cutting device 20 reciprocates in the lateral direction of the machine body with respect to the fixed cutting blade 22 while pressing the movable cutting blade 23 against the fixed cutting blade 22 by each knife clip 24 so that the movable cutting blade 23 does not float from the fixed cutting blade 22. The movable cutting blade piece 23a of the movable cutting blade 23 that is driven by the cutting blade driving device 40 and moves relatively in the lateral direction of the machine body, and the edges of the fixed cutting blade piece 22a of the fixed cutting blade 22 are connected to each other. The stockholder side is cut off.

  As shown in FIGS. 4, 5, and 6, the cutting blade driving device 40 is a cylindrical transmission case that is also used as a laterally pretreatment frame that is connected to the front end of the pretreatment frame 11 that faces the longitudinal direction of the fuselage. 15. A cutting blade drive case 42 that is also used as a transmission gear case connected to one end side of the blade 15, and is mounted in the cutting blade drive case 42 so as to be turnable in a front-rear direction through a pair of front and rear ball bearings 43, 43. The cutting blade drive shaft 44 and the rotary crank 41 and the like having a connecting boss portion 41a fitted on the front end portion 44a of the cutting blade drive shaft 44 are provided.

  An input bevel gear 45 is provided on the front end side of the cutting blade drive shaft 44 so as to rotate integrally by spline engagement, and a transmission shaft 50 having a lower end portion in the cutting blade drive case 43 is provided so as to be integrally rotatable. Is engaged with the transmission bevel gear 55.

  As clearly shown in FIGS. 7 and 8, the connecting boss 41a is connected between the connecting boss 41a of the rotary crank 41 and the front end 44a of the cutting blade drive shaft 44 on which the connecting boss 41a is externally fitted. Engagement means 46 including a recess 46 a made of a key groove provided in the portion 41 a and a transmission projection 46 b made of a key provided on the front end 44 a of the cutting blade drive shaft 44 is provided. Due to the engaging action of the protrusion 46 b and the recess 46 a of the engaging means 46, the rotary crank 41 is interlocked with the front end portion 44 a of the cutting blade drive shaft 44 so as to be integrally rotatable. The rotating crank 41 is separable in the axial direction of the cutting blade drive shaft 44 with respect to the front end portion 44a of the cutting blade drive shaft 44 because of the engaging action of the protrusion 46b and the recess 46a of the engaging means 46. In this state, the cutting blade drive shaft 44 is fixed to the front end portion 44a of the cutting blade drive shaft 44 by a set screw 47 and is brought into contact with the end face of the connecting boss portion 41a of the rotary crank 41 by the tightening force of the set screw 47. The rotating crank 41 is secured to the front end portion 44a of the cutting blade drive shaft 44 by a stopper means 48 formed of a stopper plate so as not to be detached therefrom.

  The rotating crank 41 is provided with a ballast weight portion 41b arranged in a state of being shifted in phase by 180 degrees in the rotation direction thereof, and an output shaft portion 41c having a cutting blade driving roller 49 made of a bearing. The machine body with respect to the pair of left and right passive pieces 26a of the cutting blade drive part 26 while the cutting blade drive roller 49 of the output shaft part 41c moves relative to the cutting blade drive part 26 of the cutting device 20 in the vertical direction of the machine body. The output shaft portion 41c is engaged with the cutting blade driving portion 26 so as to perform a pressing operation in the lateral direction.

As shown in FIG. 7, a recessed portion provided in the rotary crank 41 between the connecting boss portion 41 a of the rotary crank 41 and a cylindrical portion 42 a that supports the front end side of the cutting blade drive shaft 44 of the cutting blade drive case 42. 41d, sealing means 60 that fits inside the cylindrical portion 42a of the cutting blade drive case 42 to perform a dust sealing action on the cutting blade drive case 42, and a seal surface that moves relative to the rotary crank 41 while the seal means 60 is in close contact. A bush 61 interposed between the connecting boss 41a and the sealing means 60 is provided so as to be formed in the connecting boss 41a.

  As a result, the cutting blade driving device 40 is used as a preprocessing unit drive shaft 52 that is also used as a support shaft of the preprocessing unit frame 11 from the engine (not shown) of the driving unit of the self-propelled machine body as shown in FIGS. (See FIG. 3), a cylindrical transmission case 53 (see FIG. 2) extending from the base of the pre-processing unit frame 11, and a pulling drive case 54 (see FIG. 2) to which the distal end side of the cylindrical transmission case 53 is connected. Thus, the driving force transmitted to the transmission shaft 50 extending from the lower end portion of the drive case 54 is input to the cutting blade drive shaft 44 by the transmission bevel gear 55 and the input bevel gear 45, and the cutting blade drive shaft 44 is input. The rotary crank 41 is rotationally driven by the cutting blade drive shaft 44 while the cutting blade drive case 42 is sealed by the bush 61 and the sealing means 60 so that the waste scraps and the like are difficult to enter. It has become the movable cutting blade 23 of the blade driving unit 26 mowing the output shaft portion 41c of the rotary crank 41 driven by cutting device 20 so as to reciprocate.

The transmission shaft 50 includes a transmission bevel gear 56 which is a separate component from the transmission bevel gear 55 which is connected to the lower end side of the transmission shaft 50 so that the transmission bevel gear 55 is integrally pivoted to a lower end side. Power is transmitted also to the pulling transmission shaft 57 (see FIG. 5) located inside the cylindrical transmission case 15 with an input bevel gear 57a meshed with the bevel gear 56 provided at one end thereof so as to be integrally rotatable. It is supposed to do.
The rotating body 65a shown in FIGS. 5 and 6 is rotationally driven through a torque limiter 67 by a transmission cylinder shaft 66 extending from the pulling drive case 54 with the transmission shaft 50 and a double shaft structure. With the conveying claws lined up in the rotation direction on the periphery of the body 65a, the stocker side of the planted cereal from the pulling device 13 is raked into the reaping device 20, and the cereal of the harvested cereal from the reaping device 20 The original side is fed into the supply device 30 and supplied. The endless rotating belt 68 shown in FIGS. 5 and 6 is driven to rotate by a belt pulley 69 provided on the rotating body 65 a so as to be integrally rotatable, and is raised by a locking arm 68 a extending from the endless rotating belt 68. The stock side of the planted cereal from 13 is scraped and supplied to the reaping device 20. Another rotating body 65b arranged in the horizontal direction of the machine body with respect to the rotating body 65 is rotationally driven by the meshing of the conveying claws of both the rotating bodies 65a and 65b.

  As shown in FIGS. 2 and 3, the supply device 30 clamps and conveys the stock side of the harvested cereal rice cake from the harvesting device 20 along the conveyance guide rod 32 by an endless rotating chain 31. A device 33 and a tip-side locking and conveying device 36 that locks and conveys the tip side of the harvested cereal basket from the reaping device 20 along the conveying guide rod 35 by the locking claw 34a of the endless rotating chain 34. It is configured.

  As shown in FIG. 3, a driving sprocket 70 that drives the endless rotating chain 31 of the stock holding side holding and conveying device 33 and a driving sprocket 71 that drives the endless rotating chain 34 of the tip side locking and conveying device 36. Is provided on an output shaft 81 of a transport drive case 80 having one end connected to the end of the preprocessing unit drive shaft 52 so as to be integrally rotatable.

  The transport drive case 80 is configured to rotate about the axis X of the preprocessing unit drive shaft 52 with respect to the preprocessing unit drive shaft 52. That is, when the lift cylinder 5a is expanded and contracted, the conveyance drive case 80 rotates with respect to the support column 4 around the axis X together with the preprocessing unit frame 11, and the cutting preprocessing unit 10 by the lift mechanism 5 is rotated. Can be swung up and down. 2, when the handling depth motor 91 linked to the frame of the supply device 30 via the lifting / lowering operation rod 90 is driven, the transport driving case 80 is rotated around the axis X and the pre-processing unit driving shaft. 52, the supply device 30 swings around the axis X, and moves up and down along a vertical guide rail 92 (see FIG. 2) that acts on the frame of the supply device 30. ing. That is, when the supply device 30 supplies the harvested cereal meal to the threshing feed chain 6a, the stock source side part of the harvested cereal meal sandwiched by the threshing feed chain 6a can be changed and supplied in the slimming direction. Thus, the swinging up / down operation of the supply device 30 by the handling depth motor 91 is enabled.

  When the pre-processing unit frame 11 is slid with respect to the pre-processing unit drive shaft 52 and the cutting device 20 of the pre-processing unit 10 is moved and adjusted laterally with respect to the self-propelled machine body, the lifting guide rail Due to the swinging operation force acting on the supply device 30 from 92, the supply device 30 swings around the axis Y of the output shaft 81 of the transport drive case 80 in the lateral direction of the machine body, The lateral shift adjustment for 20 self-propelled aircraft is possible.

  As shown in FIGS. 3 and 12, the transport drive case 80 includes a half gear case portion 84 a that houses bevel gears 82 and 83 that interlock the preprocessing unit drive shaft 52 and the output shaft 81, and an upper end portion of the output shaft 81. A main case 84 (see FIG. 10) having a half bearing case portion 84b supported via a bearing 85, a connecting rod 84c for connecting the half bearing case portion 84b and the half gear case portion 84a, and the main case. A half gear case 87 (see FIG. 10) connected by a plurality of connecting bolts 86 to the half gear case portion 84a of 84, and a plurality of connecting bolts on the half bearing case portion 84b of the main case 84. And a half bearing case 89 (see FIG. 10) connected by 88.

The bolt holes 86a and 88a for mounting the connection bolts 86 and 88 in the half gear case portion 84a and the half bearing case portion 84b of the main case 84 are also used for mounting the connection bolts 86 of the half gear case 87. The bolt holes 86a and the bolt holes 88a for mounting the connecting bolts 88 of the half bearing case part 89 are also formed as screw-less through holes through which the connecting bolts 86 and 88 are not screwed. .
That is, when the combine is configured to have a specification incapable of lateral shift adjustment with respect to the self-propelled machine body of the reaping device 20, the stopper as shown in FIG. When the member 93 is fixed to the conveyance drive case 80 by using the connection bolts 86 and 88 for fixing, but the stopper member 93 is not necessary to configure the trimming device 20 so that the lateral shift can be adjusted. However, even when the stopper member 93 is required so that the lateral shift adjustment of the reaping device 20 with respect to the self-propelled machine body is impossible, the main case 84 and the half gear case 87 are adopted by using the same type of connecting bolts 86 and 88. In addition, the conveyance drive case 80 can be obtained by combining the half bearing case 89, as shown in FIG. 3 is connected to a support body 95 that supports the supply device frame 94 by being relatively pivotally engaged with both ends of the transport drive case 80, and a half gear case portion 84a of the transport drive case 80. Yes.

Another embodiment
In addition to the embodiment, the engaging means 46 including the protrusion 46b provided on the cutting blade drive shaft 44 and the recess 46a provided on the rotary crank 41 is employed, and the protrusion 46b is provided on the rotary crank 41. It is also possible to implement by employing an engaging means 46 provided on the cutting blade drive shaft 44 and provided with the recess 46a. In this case also, the object of the present invention can be achieved.

  In addition to harvesting rice and wheat, the present invention can also be applied to a cutting blade driving device installed in a harvester that harvests various crops such as buckwheat and soybean. Therefore, these combiners, mowers, etc. are collectively called harvesters.

Side view of the entire combine Side view of pre-cutting processing unit Cross section of supply drive case Top view of mowing device Front view of cutting blade drive case arrangement Cross section of the cutting blade drive Cross section of the cutting blade drive case seal structure Sectional view of engaging means Transmission system diagram of pre-cutting processing section Exploded view of supply drive case Plan view of stock holding side holding and conveying device Side view of the supply drive case with the stopper member assembled

20 Mowing device 23 Movable cutting blade 26 Cutting blade drive shaft 41 Rotating crank 41a Connecting boss part of rotating crank
Recessed portion 42 of 41d rotating crank Cutting blade drive case
42a Cutting Blade Drive Case Cylinder 44 Cutting Blade Drive Shaft 46 Engaging Means 46a Recess 46b Protrusion 48 Stopper Means 60 Sealing Means 61 Bushing

Claims (1)

A rotatable cutting blade drive shaft that is rotatably supported by the cutting blade drive case, and is connected to the cutting blade drive shaft so as to be integrally rotatable, and is movable by engaging with a cutting blade drive portion of a cutting device. A cutting blade drive device for a harvesting and harvesting machine having a rotating crank for reciprocating a cutting blade,
The cutting blade drive case is provided with a cylindrical portion that protrudes the cutting blade drive shaft from the cutting blade drive case and supports the cutting blade drive shaft.
An annular recessed portion positioned on the outer peripheral side of the connection boss portion is formed toward the tube portion of the cutting blade drive case so as to form a connection boss portion fitted on the cutting blade drive shaft of the rotary crank into a cylindrical shape. Provided in the rotating crank in an open state,
Engaging the the projections one has the rotating crank and the cutting blade drive shaft, said rotational crank by engagement by a recess and the other has engaged freely detachably and integrally rotated with respect to the cutting blade drive shaft the coupling means comprises over said coupling boss portion in the rotating crank and the cutting blade drive shaft, comprising a stopper means for the latch of the rotary crank to stop wearing the rotary crank with respect to the cutting blade drive shaft ,
An end portion of the cylindrical portion of the cutting blade driving case facing the rotating crank is inserted into the recessed portion of the rotating crank and the end portion of the cylindrical portion of the cutting blade driving case and the connecting boss in the rotating crank. between parts, said cutting blade sealing means for sealing action with respect to the drive case, and the cutting blade drive of reaping harvester is provided with a bushing interposed between the sealing means and the coupling boss.

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