JP6198602B2 - Combine pre-processing section - Google Patents

Description

  The present invention relates to a combine pre-processing unit.

Conventionally, a cutting part is provided on the front part of the pre-processing frame of the pre-processing part so as to be movable left and right via a left-right movement mechanism, and the cutting part is selected as a normal cutting work posture at the left position and an intermediate work posture at the right position. A combine that properly and efficiently performs the harvesting operation adapted to the shape of the field and the harvesting mode of the planted cereal by changing the mode is already known (for example, Patent Document 1).
The pre-processing unit of the above-mentioned combine is supported by a rear part of the pre-processing frame, with a handling depth transport body that transports the cereals harvested by the mowing unit to the feed chain of the rear threshing part while adjusting the handling depth. The handling depth drive shaft is used as a pivot point, and the start end side can be freely moved up and down and left and right (rotated), and the handling depth carrier is moved left and right via the coupling mechanism in conjunction with the left and right movement of the cutting unit. I have to. Then, the lowering lower limit position (the deepest handling position) of the handling depth carrier is set by bringing the contact member protruding downward from the handling frame of the handling depth carrier into contact with the pretreatment frame (transmission case) side. It has a structure equipped with a deep handling carrier stopper mechanism.

JP 10-117557 A

  In the combine shown in Patent Document 1, when the mowing unit moves left and right in the lower limit position holding state in which the contact member of the handling depth transport body stopper mechanism is in contact with the pretreatment frame side, There is an advantage that the movement can prevent a large height fluctuation on the start side. However, in this pretreatment section, the contact member that is long and bent downward from the handling depth transport body is directly connected to the pipe slope of the transmission case fixed along the pretreatment frame that is steeply inclined downward. Since it slides (slids) in the up-down direction in the contacted state, the contact member resists the weight of the deep-handed transport body when the deep-handed transport body rotates to the right based on the rightward movement of the cutting part. Therefore, the sliding resistance when sliding along the steep pretreatment frame is large, and the contact member crosses the pipe surface of the large transmission case and makes a linear contact (hereinafter simply referred to as a line). (This is referred to as a `` contact-like contact ''), so that it has a large contact surface (sliding surface) and a large movement resistance when moving the handling depth carrier in the right direction, so the operation load to move the mowing part to the right is excessive. There are disadvantages. Furthermore, on the pretreatment frame side directly under the handling deep conveying body, dust adheres and solidifies on the surface of the large pipe and accumulation of swarf, which causes a large frictional resistance when the contact member moves upward. Thus, the operation load for moving the mowing unit and the handling depth conveyance body to the right is increased. In addition, the contact member is formed with sufficient length to reach the transmission case of the pretreatment frame with steep inclination from the handling depth carrier side and the contact allowance (slide allowance) with its tip side bent to the side. Therefore, it is necessary to achieve a rigid structure for preventing the deformation and the vibration accompanying the bending of the contact member, and there are problems such as an increase in the length of the component and a complicated shape.

In order to solve the above-mentioned problems, the present invention firstly has a pulling device 22 and a stockholder on the front part of a pretreatment frame 13 that extends downward and forward from the support part of the traveling machine body 2 and is supported so as to be movable up and down. The cutting unit 7 including the transfer devices 23 and 23a and a cutting blade is provided so as to be movable left and right via the left and right moving mechanism 10, and the cereals harvested by the cutting unit 7 are moved up and down on the feed chain 6a of the rear threshing unit 6. The handling depth conveyance body 8 that is conveyed while adjusting the handling depth by turning is capable of turning the start end side up and down and sideways with a handling depth drive shaft 19 pivotally supported at the rear portion of the pretreatment frame 13 as a pivot point. And a connecting mechanism 43 for connecting the handling depth transport body 8 to rotate in the left-right direction in conjunction with the movement of the cutting unit 7 in the left-right direction, and downward from the transport body frame 35 of the handling depth transport body 8. Protruding contact member 45 and contact with it Is composed of a stopper portion 46 provided in the previous processing frame 13 side that, in the preprocessing section 9 combine with a 扱深 carrier stopper mechanism 1 for setting the lowering limit position of 扱深 carrier 8,
Wherein the stopper portion 46 protruding from the top of the pre-processing frame 13, forms a stopper 46b which is a straight-like contact portion which Setto the contact member 45 to the upper portion of the stopper portion 46, the stopper as viewed from the side The inclination of 46b is set to be gentler than the inclination of the mounting surface on which the stopper portion 46 on the pretreatment frame 13 side is projected .
Secondly, the stopper 46b and the contact member 45 are formed in a small-diameter round bar shape, and the handling deep conveying body 8 is moved left and right while sliding the contact member 45 to the stopper 46b by point contact. It is said.

According to the first aspect of the present invention, the cutting part is provided in the front part of the pretreatment frame so as to be movable left and right via the right and left movement mechanism, and the handling depth drive shaft that is pivotally supported by the rear part of the pretreatment frame is used as the rotation fulcrum. A connecting mechanism that is provided so that the start end side is pivotable in the lateral direction and is connected so as to rotate the handling depth conveyance body in the left-right direction in conjunction with the movement of the cutting part in the left-right direction, and conveyance of the treatment depth conveyance body A handling depth conveying body stopper mechanism configured with a contact member projecting downward from the body frame side and a stopper portion provided on the pretreatment frame side that abuts on the contacting member, sets a lowering lower limit position of the handling depth conveyance body. provided in the preprocessing section of the combine, projecting a stopper on top of the previous processing frame, forming a stopper which is a straight-shaped contact portion for contact member and brought into contact with the upper portion of the stopper portion, viewed from the side pretreatment frame inclination of the stopper in By the stopper portion has an inclined than gradually inclined mounting surface to be projected, to the gentle slope while close stopper in扱深conveying side, beginning the扱深carrier during horizontal movement of the reaper Since the sliding movement of the contact member with respect to the stopper is smooth when the cutting part is moved to the right, the movement of the cutting part can be easily performed while reducing the operating load. it can.
According to the second aspect of the present invention, the stopper and the contact member are formed in a small-diameter round bar shape, and the contact depth is moved to the left and right while the contact member is slid by point contact with the stopper. The contact member is slid by continuous point contact with little frictional resistance and movement resistance due to dust, etc., on a stopper that is gently inclined and difficult to adhere dust without contacting the member with a large friction surface. It is possible to smoothly move the deep conveyance body to the right and reduce an operation load when the mowing unit moves to the right.

It is a front perspective view of a combine. It is a top view of the pre-processing part which moved the cutting part to the right. It is a top view of the pre-processing part which left-moved the cutting part. It is a side view which shows the structure of a pre-processing part. It is a top view which shows the structure of a pre-processing frame and a left-right movement mechanism. It is a top view which shows the structure of a handling depth conveyance body and a handling depth conveyance body stopper mechanism. It is a side view which shows the structure of the handling depth conveyance body stopper mechanism. It is a perspective view of the principal part which shows the structure of the handling depth conveyance stopper mechanism.

  Embodiments of the present invention will be described with reference to the drawings. The symbol A shown in the figure is a combine provided with the deep handling carrier stopper mechanism 1 according to the present invention. In this combine A, a traveling tank body 2 having a pair of left and right crawler type traveling sections 2a is provided with a glen tank 5 from a front section on the right side through a control section 3 and a prime mover section, and a threshing section 6 on the left side. It is arranged. A pre-processing unit 9 including a cutting unit 7 and a handling depth transport body 8 is supported at a position in front of the threshing unit 6 so as to be movable up and down, and is installed so as to freely adjust the crop cutting height and the handling depth. And the cutting part 7 is provided in the front part of the pre-processing part 9 so that it can move right and left via the left-right movement mechanism 10 mentioned later. As a result, the combine A cuts the crops to be planted in the field by the cutting unit 7 of the pre-processing unit 9, and the harvested cereal cocoon includes a stock holding carrier 8 a and a tip locking carrier 8 b. 8 through the feed chain 6 a of the threshing unit 6, the grains threshed and sorted by the threshing unit 6 are supplied to and stored in the glen tank 5 and a series of combine operations are performed.

  Hereinafter, the detailed structure of the pre-processing unit 9 will be described with reference to FIGS. First, a pre-processing drive case 11 that transmits power to the pre-processing unit 9 is pivotally supported on a support frame 12 that is erected on the front part of the traveling machine body 2, and the pre-processing frame is provided in the middle of the case. 13 extends forward and downward, and the pretreatment portion 9 can be moved up and down by extending and retracting the raising and lowering cylinder 14 on the traveling machine body 2 in the middle portion of the pretreatment frame 13. As shown in FIG. 5, a pre-processing unit drive shaft 15 is rotatably mounted in the pre-processing drive case 11, and power is input from a transmission (not shown) via an input pulley 16, and a shaft intermediate portion and shaft The pretreatment unit 9 is driven by a cutting drive shaft 18 supported by a shaft case 29 to be described later via a bevel gear transmission mechanism 17 from the end, and the handling depth transport body 8 is driven by a handling depth drive shaft 19. I have to.

  That is, the pre-processing unit drive shaft 15 is a cutting power distribution shaft (not shown) that is housed in a cutting power distribution case 20 that is disposed in the lower rear portion of the cutting unit 7 via the cutting drive shaft 18 so as to face in the left-right direction. Power is transmitted to. The reaping power distribution shaft transmits power to the pulling device 22 via the inside of the cylindrical pulling brackets 21 erected on the left and right ends of the reaping power distribution case 20, and from the intermediate portion of the reaping power distribution case 20. Power is transmitted to the stock transport device 23 and the stock transport device (star wheel) 23a arranged in the upper and lower stages. The cutting power distribution case 20 also serves as the main frame of the preprocessing unit 9, and a divider 25a is provided at the tip of a plurality of divider support frames 25 extending forward from the cutting power distribution case 20, and is raised in the middle. The lower part of the device 22 is attached.

  The handling depth drive shaft 19 is driven by a handling depth adjustment mechanism similar to the conventional one, with the handling depth case portion 11a that pivotally supports the handling depth drive shaft 19 with respect to the pretreatment drive case 11 and the pretreatment portion drive shaft 15 as the center. It is designed to be rotatable in the vertical direction. Further, the stock holding carrier 8a and the tip locking carrier 8b can move up and down integrally around the pre-processing unit drive shaft 15 via the handling case 11a and the carrier frame 35 described later. . The handling depth drive shaft 19 is pivotally supported with a predetermined inward angle in front and plan views with respect to the pretreatment drive case 11 via the handling depth case portion 11a, and is attached to the lower and upper portions of the shaft. The driven sprockets 26 and 26a are configured to drive the stock holding carrier 8a and the tip locking carrier 8b of the handling depth carrier 8.

  This handling depth conveyance body 8 connects the arm portion 11b protruding from the handling depth case portion 11a with a handling depth adjustment mechanism including manual handling depth adjustment means and automatic handling depth control means, as shown in FIG. The handling depth is adjusted by the expansion / contraction operation of the electric cylinder 27. Accordingly, the handling depth transport body 8 that moves up and down by the handling depth adjusting mechanism lowers the handling depth transport body 8 so as to be deep handling when the length of the cereal is short, and when the length of the cereal is long The handling depth conveyance body 8 is raised so that it becomes shallow handling, and the handling depth adjustment conveyance according to the length of the cereal is performed. In addition, the arm part 11b is connected with the electric cylinder 27 through the interchangeable connection mechanism 27a which has a long hole of an up-down direction similarly to the conventional one. Accordingly, when the pretreatment frame 13 is raised and the stopper 46b comes into contact with the contact member 45 at the set treatment depth adjustment position, the handling depth transport body 8 follows the handling depth transport body 8 through the contact. The upward rotation can be performed without hindrance.

  Next, the left / right moving mechanism 10 will be described with reference to FIGS. First, the pretreatment frame 13 is integrally attached to a pretreatment drive case 11 and a shaft case 29 that protrudes from the pretreatment drive case 11 and supports the cutting drive shaft 18, and extends forward and downward. The left-right moving mechanism 10 is comprised in the part. And the left-right moving mechanism 10 supports the reaping part 7 so that it can move left and right via a parallel link mechanism 30 formed at the tip of the preprocessing frame 13. The parallel link mechanism 30 is configured by connecting a link support frame 31 fixed to the front end of the pretreatment frame 13 in the left-right direction and the left and right ends of the cutting power distribution case 20 with a pair of left and right link arms 32. ing.

  Further, the left / right moving mechanism 10 includes a stopper mechanism (not shown) for positioning the cutting unit 7 at a predetermined position on the left and right of the parallel link mechanism 30. A connecting frame 33 is connected to the pretreatment drive case 11 via a support shaft 33a so as to be swingable in the left-right direction, and a front end side is provided on the pull-up bracket 21 so as to be slidable back and forth. It has an anti-vibration structure from the two sides and is connected and supported. The switching operation lever 34 of the left / right moving mechanism 10 is attached to the pulling bracket 21 of the pulling device 22 on the left side. Thereby, the switching operation lever 34 is used as a handle for switching the stopper mechanism from the steering unit 3 to the fixing and releasing operation and moving the cutting unit 7 left and right when releasing the fixing.

  Next, the handling deep conveyance body 8 will be described with reference to FIGS. The stock holding carrier 8a and the tip locking carrier 8b, which are driven by the drive sprockets 26, 26a, via a carrier frame 35 attached and fixed to the handling depth case portion 11a in the same manner as conventional ones. The driven sprockets 36 and 36 a are pivotally supported at predetermined positions at the front end of the carrier frame 35. As a result, the stock holding and conveying body 8a is constructed by stretching the stock carrying chain 37 between the drive sprocket 26 and the driven sprocket 36, and the grain holding rail 39 on the side of the carrying.

  In addition, the tip locking carrier 8b is configured such that a tip tip transport chain 37a is stretched between the drive sprocket 26a and the driven side sprocket 36a, and a cereal guide rail 39a is provided on the side surface of the tip. The pestle clamping rail 39 and the pestle guide rail 39a are attached to the distal end portion of a support ridge 40 made of a downward U-shaped pipe whose base side is fixed to the carrier frame 35. Further, the handling depth transport body 8 is slidably fitted into a curved guide body 42 fixed to the back of the right pulling device 22 with a lifting guide 41 protruding from the transport body frame 35 to the front. A combined connecting mechanism 43 is provided.

  As a result, the handling depth transport body 8 that is supported by the handling depth drive shaft 19 in a cantilevered state from the handling depth case portion 11 a can move up and down on the distal end side through the engagement of the coupling mechanism 43. It has a horizontal anti-vibration action and performs smoothly, and the follow-up operation when the cutting unit 7 moves left and right via the left and right moving mechanism 10 is performed smoothly around the handling depth drive shaft 19. Yes. And the handling depth conveyance body 8 comprises the handling depth conveyance body stopper mechanism 1 which prescribes | regulates the descent | fall lower limit position between the pre-processing frames 13. FIG.

  Next, the handling depth conveyance body stopper mechanism 1 will be described with reference to FIGS. The handling depth conveyance stopper mechanism 1 includes a contact member 45 projecting downward from the base side of the conveyance frame 35 of the handling depth conveyance 8, a stopper portion 46 configured on the pretreatment frame 13 side, and the like. Consists of. That is, the contact member 45 in the illustrated example is formed by bending a bar (round bar) having a circular cross section, and contacts along the base side of the support rod 40 fixed integrally with the carrier frame 35. A straight base portion side of the member 45 is attached, and a contact portion 45a having a substantially horizontal contact allowance (stopper allowance) is formed by bending rightward from the base portion side. On the other hand, the stopper portion 46 includes a stopper base 46a erected on the upper surface of the outer periphery of the shaft case 29 in the front-rear direction, and a straight bar having a circular cross-section (fixed along the upper side of the stopper base 46a). And a stopper (contact portion) 46b made of a round bar). The contact member 45 and the stopper 46b are both formed in a round bar shape having a smaller diameter than the pretreatment frame 13.

  As a result, the stopper portion 46 has a small frictional resistance when the circular cross sections of the stopper members 46 are brought into contact with each other in the contact state in which the handling depth conveyance body 8 is lowered and the lower surface of the contact member 45 contacts the upper surface of the stopper 46b. The handling depth conveyance body 8 is supported in the lowering lower limit position in the contact state. And when the cutting depth conveyance body 8 carries out the left-right switching movement of the cutting part 7 in the said contact support state, the handling depth conveyance body 8 follows and rotates in the left-right direction centering | focusing on the handling depth drive shaft 19 via the connection mechanism 43. At this time, as shown by an arrow in FIG. 6, the contact member 45 smoothly slides (slidably contacts) along the upper surface (slide portion) of the stopper 46b while maintaining the contact support state by point contact.

  In addition, the stopper portion 46 in the illustrated example is a triangular plate having a stopper base 46a with a front side that is higher and a rear side that is lower in a side view, and a bar-like stopper 46b is provided on the hypotenuse. The stopper base 46a is provided with a protrusion 46c that protrudes higher than the stopper 46b at the front part thereof (FIGS. 7 and 8). The protrusion 46c regulates the downward movement of the contact portion 45a, thereby preventing the contact member 45 from being displaced and facilitating operations such as assembly and removal of the handling depth transport body 8. It is. 7, the stopper 46b forms a stopper guide angle (upper surface inclination angle) θ between its upper surface and the shaft case 29 as shown in FIG. A gentle inclination close to the horizontal direction can be achieved. In other words, the stopper portion 46 of the embodiment is configured so that the stopper 46b is a gently inclined slide portion in which the stopper guide angle θ is added to the steep inclination angle of the carrier frame 35, so that the contact with the right movement of the handling depth carrier 8 is achieved. The upward movement of the member 45 can be smoothly slid without requiring a large force.

  Further, since the stopper portion 46 brings the stopper 46b closer to the handling depth conveyance body 8 side through the stopper base 46a having an upward height from the shaft case 29, the support length of the contact member 45 is made as short as possible. It is possible to reduce the weight by a simple and inexpensive structure while reducing the weight by using a short rod with a small diameter without increasing the length of the abutting member 45 with a large diameter and a long span unlike the conventional one. It can be configured to prevent or regulate vibration.

  The stopper portion 46 is a triangular plate having a height in a side view that provides sufficient contact support, and has an acute ridge line portion without using a round bar by applying a sharp cross-section to the upper side thereof. Can also be used as the stopper 46b. The stopper portion 46 is bent in a U shape so that the front end side of one round bar is long and the rear end side is shortened to form a front leg portion and a rear leg portion. 29 or the pre-processing frame 13 side. In this case, since both leg portions serve as the stopper base 46a, a gently inclined stopper 46b having the same stopper guide angle θ as that of the stopper base 46a is formed therebetween.

  Next, the usage mode and operation of the combine A including the handling depth conveyance body stopper mechanism 1 having the above-described configuration will be described. This combine A can be used when the pre-processing unit 9 is moved up and down or the mowing unit 7 is moved left and right when the traveling machine body 2 is driven to the shore or to the headland, or to the intermediate work and the shoreline. There are times when mowing. At this time, the vertical movement of the pretreatment unit 9 is performed by extending and lowering the pretreatment frame 13 whose base end is the lower part of the front side of the traveling machine body 2 by expanding and contracting the elevating cylinder 14. When the pretreatment section 9 is raised to a predetermined height, the stopper 46b of the stopper section 46 comes into contact with the contact member 45, and the handling deep conveying body 8 is moved through the interchangeable coupling mechanism 27a as the pretreatment section 9 is raised. Therefore, the start end side of the handling depth transport body 8 and the star wheel 23a do not come into contact with each other.

  On the other hand, the left-right movement of the mowing unit 7 that selectively combines the mid-cutting operation or the normal mowing work such as the edge mowing or the turn mowing and performs the combining work is performed by switching the switching operation lever 34 from the control unit 3. This is done by rotating the link arm 32 of the parallel link mechanism 30 to the left or right when unlocking. At this time, since the handling depth transport body 8 follows the left and right directions around the handling depth drive shaft 19 via the coupling mechanism 43 based on the left and right movement of the cutting unit 7, the handling depth can be adjusted and transported without any trouble. it can.

  Then, at the lower lower limit position (the deepest handling position) where the handling depth transport body 8 is lowered to the lowest position (the deepest handling position) where the contact member 45 abuts against the stopper 46b, the cutting portion 7 is moved to the left position shown in FIG. 2) to the right position (intermediate work position) shown in FIG. 2, the handling depth conveying body 8 is moved along the upper part of the stopper 46b having the gentle inclination as shown in FIG. While making point contact, it moves upward in a side view so as to draw an arc in a plan view.

  As a result, the stopper portion 46 of the embodiment is a friction that makes the contact member 45 come into contact with a large friction surface against a large transmission case that is inclined downward at a steep angle, the pretreatment frame 13 or the like, as in a conventional combine. The contact member 45 can be slid by continuous point contact on the stopper 46b, which is gently inclined and hardly adheres to dust, without resistance and resistance to movement due to dust attached to the transmission case. Accordingly, since the right turning movement of the handling depth carrier 8 when moving the mowing unit 7 to the right is made smooth, the operation load when the mowing unit 7 moves to the right can be reduced.

  Further, the handling depth transport body 8 that follows and rotates in the same direction as the mowing unit 7 moves to the right is supported by the stopper 46b having the stopper guide angle θ and the gently inclined stopper 46b. 8 while holding the cutting edge 7 at the left position while avoiding contact between the starting end of the star wheel 23a and the star wheel 23a. Smooth without changing the thickness. Further, the contact member 45 has features such as prevention of bending and regulation of vibration of the handling depth transport body 8 by a rigid structure in which the support length is made as short as possible.

  Further, the stopper 46b and the contact member 45 have a cross-sectional shape that is slid by point contact, and the contact depth 45 is moved to the left and right while the contact member 45 is slid by point contact to the stopper 46b. Without contacting the member 45 with a large friction surface, the contact member 45 is slid on the stopper 46b which is gently inclined and hardly adheres to dust by continuous point contact with little movement resistance due to frictional resistance or dust. Further, there is a feature that it is possible to smooth the right rotation movement of the handling depth carrier 8 and to reduce an operation load when the cutting unit 7 is moved rightward.

A Combine 1 Handling depth conveyance body stopper mechanism 2 Traveling machine body 6 Threshing part 6a Feed chain 7 Cutting part 8 Handling depth conveyance body 9 Pretreatment part 10 Left and right movement mechanism 13 Pretreatment frame 19 Handling depth drive shaft 22 Pulling device 23, 23a Original conveying device 35 Conveyor frame 43 Connecting mechanism 45 Contact member 46 Stopper portion 46a Stopper base 46b Stopper (contact portion)
θ Stopper guide angle

Claims (2)

A pulling device (22) and stock transporting devices (23), (23a) are mounted on the front portion of the pretreatment frame (13) that extends downward and forward from the support portion of the traveling machine body (2) and is supported so as to be movable up and down. In addition, a cutting part (7) made of a cutting blade or the like is provided so as to be movable left and right through a left-right movement mechanism (10), and the cereals harvested by the cutting part (7) are fed into the feed chain of the rear threshing part (6) (6a) The handling depth transport body (8) that conveys while adjusting the handling depth by turning up and down, and the handling depth drive shaft (19) that is pivotally supported on the rear part of the pretreatment frame (13) is the starting point. A connecting mechanism (43) that is provided so as to be pivotable to the side, and that is connected so as to rotate the handling conveying body (8) in the left-right direction in conjunction with the horizontal movement of the cutting part (7). , A contact member (45) projecting downward from the carrier frame (35) side of the handling depth carrier (8), and a pretreatment frame (13) in contact therewith In the pre-processing section (9) of the combine, comprising a handling depth conveyance stopper mechanism (1) that is configured with a stopper section (46) provided on the side and sets a lowering lower limit position of the handling depth conveyance (8). A stopper (46) is provided on the upper part of the pretreatment frame (13) so as to project, and a stopper (46b) which is a straight contact part contacting the contact member (45) on the upper part of the stopper (46). forming a combine, characterized in that the gently slant than the inclination of the mounting surface on which the stopper portion of the pre-processing frame (13) side (46) is projecting an inclination of the stopper (46b) in a side view Pre-processing part.   The stopper (46b) and the contact member (45) are formed into a small-diameter round bar shape, and the handling depth conveyance body (8) is moved left and right while the contact member (45) is slid by point contact with the stopper (46b). The combine pre-processing unit according to claim 1, wherein:

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