JP5612534B2 - Combine - Google Patents

Description

  The present invention includes a cutting clutch that interrupts the power transmitted to the cutting unit, a cutting clutch lever that artificially operates the cutting clutch, and the cutting unit that is in the on state in conjunction with the ascent of the cutting unit. The present invention relates to a combine equipped with an interlock operation mechanism for performing a clutch disengagement operation.

  As a combine configured as described above, Patent Document 1 includes a first release wire that operates a cutting clutch by a cutting clutch lever (a manual operation lever in the literature), and the cutting clutch side of the outer portion of the first release wire. A drive arm that includes a relay swing arm that supports the end of the relay swinging mechanism, includes a biasing mechanism that applies a biasing force in the direction of entering the relay swing arm, and swings when the cutting unit is lifted, and the drive arm There is shown an auto clutch provided with a second release wire for transmitting the swinging force to the relay swinging arm.

  In Patent Document 1, a cam mechanism is provided on a support frame of a cutting part, and a roller part that is in contact with a cam surface (arc surface) of the cam mechanism is provided at a tip of a drive arm. The drive arm is rocked by the force acting on the roller from the cam surface, and this rocking force is transmitted from the second release wire to the relay rocking arm to perform rocking. The interlocking operation mechanism is configured to do this.

Japanese Patent Laid-Open No. 10-56855

  The auto clutch described in Patent Document 1 requires a cam mechanism, a drive arm, and a wire, so that the number of parts is likely to increase, and the positional relationship between the cam mechanism and the roller portion of the drive arm is set. High accuracy is required to swing the relay swing arm, such as setting the relationship of the wire operation amount with respect to the swing amount.

  Such a large number of parts not only leads to an increase in cost, but also takes time and labor to assemble, and in the case where accuracy is required for assembling multiple parts, adjustment is required after assembling. There is room for improvement because productivity is not good.

  An object of the present invention lies in that an interlocking operation mechanism that switches a mowing clutch from an on state to a cut state in conjunction with the raising of the mowing portion is easily configured with a small number of parts.

  A feature of the present invention is that it includes a cutting clutch that performs intermittent transmission of power transmitted to the cutting unit, a cutting clutch lever that artificially operates the cutting clutch, and is in an on state in conjunction with the ascent of the cutting unit. A combine having an interlock operation mechanism for performing a cutting operation of the cutting clutch, wherein an operation wire for transmitting an operating force of the cutting clutch lever to the cutting clutch includes an inner wire and an outer wire; One end of the inner wire is connected to the cutting clutch lever, the other end is connected to the intermittent operation member of the cutting clutch, and the end of the outer wire on the cutting clutch lever side is supported by the body frame. The cutting clutch side end is supported by an intermediate member, and the intermediate member closes the outer wire end to the intermittent operation member. Configured to be displaceably supported between a close attitude and a separating attitude separated from the intermittent operation member, and configured to cause the cutting clutch to be turned on and off by movement of the outer wire accompanying the displacement. The interlocking operation mechanism is configured to include a rod-like operation member whose base end side is linked to the intermediate member, and a regulating member supported by the harvesting unit. The regulating member comes into contact with the tip of the actuating member when the actuating member is lifted over the range, and the intermediate member is displaced by the pressing force acting in the longitudinal direction of the actuating member to operate the cutting clutch. It is in the point which is comprised.

According to this configuration, in a state where the reaping clutch lever is set to the on position, when the reaping part rises above the set level, the regulating member is brought into contact with the distal end portion of the actuating member to operate from the regulating member. A pressing force acts on the member. This pressing force acts in the longitudinal direction of the rod-shaped actuating member to displace the intermediate member in its longitudinal direction, and this displacement changes the position of the outer wire supported by the intermediate member, so that the cutting operation of the cutting clutch can be performed. Done. In this configuration, as the configuration for displacing the intermediate member, the configuration includes a regulating member and an actuating member, so that many parts are not required. Further, in this configuration, since the operating member directly transmits the pressing force from the restricting member to the intermediate member, the position of the restricting member is changed, for example, when setting the timing for operating the cutting clutch. It is only necessary to adjust the length of the actuating member, and high accuracy is not required for assembly, and adjustment can be performed easily.
As a result, an interlock operation mechanism that switches the mowing clutch from the on state to the off state in conjunction with the ascent of the mowing portion is configured with a small number of parts and easy to assemble.

  The present invention includes a rotatable roller at the tip of the operating member, and the cutting unit includes a guide mechanism that allows the roller to move while being in contact with the roller when moving up and down below the set level. And the restriction member may be provided at an end of the guide mechanism.

  According to this, when the cutting part is below the set level, the roller at the tip of the operating member is maintained in contact with the guide mechanism, and the roller rotates as the cutting part moves up and down, thereby enabling smooth raising and lowering. To do. Further, when the cutting part rises above the set level, the roller moves in a state where the roller comes into contact with the guide mechanism, and the roller comes into contact with the regulating member at the end of the movement. It is possible to disengage the reaping clutch by displacing the intermediate arm in an unreasonable state.

It is a whole side view of a combine. It is a top view of an operation part. It is a figure which shows the transmission system of a combine typically. It is a side view which shows a cutting clutch and an interlocking operation mechanism. It is a side view which shows the operating state of the interlocking operation mechanism at the time of a raise of a cutting part. It is a perspective view which shows a guide mechanism and an operation member. It is a side view which shows a main frame and a raising / lowering cylinder. It is a side view which shows the relationship between a raising / lowering cylinder and an arm body. It is the IX-IX sectional view taken on the line of FIG. It is a top view which shows the structure of a body frame front part. It is a front view which shows the positional relationship of an auxiliary | assistant vertical frame and a continuously variable transmission. It is a side view which shows the interlocking operation mechanism of another embodiment (a).

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Overall structure of the combine]
As shown in FIG. 1, the front end of a traveling machine body A traveling by a pair of left and right crawler traveling devices 1 is provided with a cutting part B that can be moved up and down by the operation of the lifting cylinder 10, and a driver boardes the front part of the traveling machine body A. A threshing device D that includes a driving unit C that performs the operation and supplies a harvested cereal meal from the reaping unit B to the traveling machine A, and a grain tank E that stores the grains selected by the threshing device D. Self-detaching combine is configured.

  In this combine, when the harvesting part B and the threshing device D are driven during the harvesting operation, the traveling machine body A is advanced to cut the stock of the culm by the reaping part B and to harvest the culm. The cereal is transported to the threshing device D to perform the threshing process, and the grain obtained by the threshing process of the threshing apparatus D is stored in the grain tank E.

  As shown in FIG. 2, the driver C is provided with a step 11 on which the driver gets on and a driver seat 12 on which the driver is seated, and a control lever 13 that the driver operates at a position in front of the driver seat 12. And a main transmission lever 14, an auxiliary transmission lever 15, a mowing clutch lever 16, and a threshing clutch lever 17 are provided on a side panel as a side control tower at a side position of the driver seat 12. 11 is provided with a brake pedal 18. The main transmission lever 14, the auxiliary transmission lever 15, the reaping clutch lever 16, and the threshing clutch lever 17 are arranged so as to be inserted through guide holes formed in the guide plate 19 that forms the upper surface of the side panel. Yes.

  The engine 2 is provided at a lower position of the driver seat 12, and as shown in FIG. 3, a transmission that transmits driving force to the left and right crawler traveling devices 1 at the front position of the traveling machine body A and the center position in the left and right direction A case 3 is arranged, and a hydrostatic continuously variable transmission 4 (HST) is connected to the upper portion of the transmission case 3. The transmission system between the engine 2 and the continuously variable transmission 4 is provided with a main belt transmission mechanism 5 that interrupts the driving force, and the transmission system that transmits the driving force from the transmission case 3 to the cutting part B has a belt. A tension type mowing clutch 6 is provided, and a belt tension type threshing clutch 7 is provided in a transmission system for transmitting a driving force from the engine 2 to the threshing device D.

  The transmission case 3 has a built-in gear-type sub-transmission mechanism 3T that shifts the driving force transmitted from the continuously variable transmission 4 in two steps, high and low. The driving force shifted by the sub-transmission mechanism 3T is driven left and right. A traveling drive system that transmits from the sprocket 3 </ b> S to the left and right crawler traveling devices 1 is built in the transmission case 3. In addition, the transmission case 3 includes a steering clutch mechanism 3A that intermittently interrupts the driving force transmitted to the left and right drive sprockets 3S, and a brake mechanism 3B that simultaneously applies a braking force to the left and right drive sprockets 3S. Yes. Although not shown in the drawing, the left and right steering clutch mechanism 3A is operated by left and right steering cylinders that are hydraulically operated.

  The control lever 13 maintains a neutral posture in a non-operating state, and operates a steering control valve (not shown) when operated in any of the left and right directions, and controls the left and right steering clutch mechanisms 3A. Of these, the hydraulic oil is supplied from the steering control valve to the one corresponding to the operation (for example, the right steering clutch mechanism 3A when operated to the right side) to cut off the power to realize the steering of the traveling machine body A. In addition, when the control lever 13 is operated in the front-rear direction, a lifting control valve (not shown) is operated to supply and discharge hydraulic oil to and from the lifting cylinder 10 so as to raise and lower the cutting part B.

  The main transmission lever 14 has a neutral position N where the traveling machine body A is stopped, a forward transmission range F formed forward from the neutral position N, and a reverse transmission range R formed rearward from the neutral position N. The main transmission lever 14 and the continuously variable transmission 4 are linked and linked by a rod, a wire, or the like, thereby realizing a stepless transmission operation by operating the main transmission lever 14. The auxiliary transmission lever 15 is configured to be freely operated at a high speed position “H” and a low speed position “L”, and the auxiliary transmission lever 15 and the auxiliary transmission mechanism 3T are linked and linked by a transmission rod (not shown). Switching between high-speed traveling and low-speed traveling is realized by operating the auxiliary transmission lever 15.

  As shown in FIG. 4, the cutting clutch lever 16 is configured to be freely switchable between an on position “on” and a cutting position “off” by a swing operation, and is linked to the cutting clutch 6 by an operation wire 50. The cutting clutch 6 is turned on and off by operating the cutting clutch lever 16. The threshing clutch lever 17 is configured to be freely switchable between an entering position “ON” and a cutting position “OFF” by a swing operation, and the threshing clutch lever 17 and the threshing clutch 7 are linked and linked by a rod, a wire, or the like. Thus, the threshing clutch 7 is turned on and off by operating the threshing clutch lever 17.

  The brake pedal 18 is interlocked and linked by a brake mechanism 3B built in the transmission case 3 and a brake operation mechanism (not shown), so that the braking force is applied to the left and right crawler travel devices 1 in conjunction with the depression operation of the brake pedal 18. Act.

  As shown in FIGS. 10 and 11, the body frame AF of the traveling body A includes a vertical frame 71 disposed on both sides in a front-rear posture, and a plurality of horizontal frames 72 in a lateral posture connecting them. . Among the left and right vertical frames 71, the right (operating unit side) one is extended to the front end position of step 11, and an auxiliary vertical frame 73 that is in a posture parallel to the extended portion is provided inside the body, An auxiliary horizontal frame 74 is provided that connects the auxiliary vertical frame 73 and the right vertical frame 71 in a horizontal orientation.

  At the front end of the auxiliary vertical frame 73, a projection frame 75 is provided on the inner side of the auxiliary vertical frame 73 so as to protrude further from the inner surface side of the auxiliary vertical frame 73 toward the center of the aircraft. The lower end of the supporting columnar frame (not shown) is connected. Although not shown in the drawing, step 11 is connected to the upper ends of a plurality of columnar frames.

  The continuously variable transmission 4 is detachably connected to the upper side surface of the transmission case 3, and the upper portion of the continuously variable transmission 4 is disposed at a level overlapping the body frame AF. When the continuously variable transmission 4 is removed from the transmission case 3 for the purpose of repair or inspection of the continuously variable transmission 4, the continuously variable transmission 4 is moved away from the transmission case 3 (outside the machine body). In order to enable this movement, as shown in FIG. 10, a distance S is set between the outer surface of the continuously variable transmission 4 and the auxiliary vertical frame 73 adjacent thereto so as to enable removal work. ing.

  In other words, an arrangement in which the auxiliary vertical frame 73 is displaced outward is adopted, and the protruding frame 75 for supporting the lower end of the columnar frame does not interfere with the continuously variable transmission 4 on the front end side of the auxiliary vertical frame 73. It is possible to support step 11 while creating the distance S by connecting to the front position.

[Mowing section]
As shown in FIGS. 1 and 4, the cutting unit B includes a plurality of weeding tools 21 that perform weeding of planted cereals, a plurality of pulling devices 22 that cause planted cereals, and The clipper-type cutting device 23 that cuts the stock is provided, and the transport device 24 that transports the cereals whose stock has been cut by the cutting device 23 and supplies it to the feed chain FC of the threshing device D. The cutting part B includes a round pipe-shaped support frame 26 that is swingably supported around the main axis X in a lateral orientation with respect to the cutting part support base 25 at the front end of the machine body frame AF, and the support frame 26. A pipe-shaped main frame 27 projecting diagonally downward from the front, a pipe-shaped front frame 28 in a lateral orientation connected to the lower end position of the main frame 27, and upward from one end of the front frame 28 A transmission frame 29 that transmits a driving force to the pulling device 22 in an extended posture is provided, and a connecting frame 30 that connects the upper end of the main frame 27 and the upper end portion of the pulling device 22 is provided.

  The support frame 26 is internally provided with a transmission shaft 26A, and an input pulley 42 is provided at an end of the transmission shaft 26A on the engine side. In this cutting part B, the driving force from the transmission shaft 26A is applied to the transmission shaft (not shown) inside the main frame 27, the transmission shaft (not shown) inside the front frame 28, and the inside of the transmission frame 29. A transmission system that sequentially transmits to a transmission shaft (not shown) is configured, and a driving force from the transmission system is transmitted to the pulling device 22, the cutting device 23, and the conveying device 24.

  As shown in FIGS. 7 to 9, a bracket 32 is fixedly provided at a portion facing the traveling machine body A in the middle portion of the main frame 27. At the rear of the main frame 27 above the bracket 32, a pair of left and right arm bodies 34 are provided so as to sway about a support pin 33 in a lateral orientation, and the tip of the piston rod 10 </ b> A of the elevating cylinder 10 is provided. A drive pin 35 is provided in the vicinity in a penetrating state. The drive pin 35 is connected in such a manner as to penetrate the lower ends of the left and right arm bodies 34, and the arm body 34 and the bracket 32 are connected to the lower ends of the left and right arm bodies 34 so that the arm body 34 is connected to the bracket 32. The fixing pin 36 is provided.

  A holding frame 37 bent in a U-shape is connected to an intermediate position of the arm body 34 so as to connect the left and right arm bodies 34, and a pair of ends of the holding frame 37 are rearward from the arm body 34. It is formed as a protruding portion 37A that protrudes, and a connecting hole 37B is formed in the protruding portion 37A.

  The bracket 32 is formed with an engaging recess 32A that is open rearward so that the drive pin 35 is engaged, and a stopper 38 that protrudes rearward is fixed to the upper end position of the bracket 32. A block body 39 is fixed to an upper portion of the front end of the cylinder portion 10B of the elevating cylinder 10 at a position facing the stopper 38, and a contact bolt is attached to a screw hole formed in a front-back orientation with respect to the block body 39. 40 is screwed in such a manner that the bolt head 40 </ b> A protrudes forward, and a lock nut 41 is screwed into a thread portion of the contact bolt 40 protruding rearward from the block body 39.

  Since the tip of the piston rod 10A of the elevating cylinder 10 is engaged with the engaging recess 32A of the bracket 32 in this way, the main frame 27 is swung around the main shaft core X by the expansion and contraction operation of the elevating cylinder 10, As shown by the phantom line in FIG.

  In this combine, the crawler traveling device 1 is connected to the ground contact position so that the harvesting operation can be performed even when the front part of the traveling machine body A is lifted up as in the case where the rear end side of the crawler traveling device 1 sinks into the field. It is comprised so that the front-end part of the cutting part B can be lowered | hung to the level lower than a line. However, if the cutting part B is lowered too much, the weeding tool 21 may come into contact with the field scene and be damaged when the posture of the traveling machine A changes, and the position of the stopper 38 and the contact bolt 40 It is comprised so that the fall limit of the cutting part B can be performed arbitrarily by adjusting the relationship.

  That is, the amount of protrusion is arbitrarily set by the rotation of the contact bolt 40, and the lock nut 41 is brought into pressure contact with the rear surface of the block body 39 so that the bolt head 40A of the contact bolt 40 comes into contact with the stopper 38. The level of the part B can be arbitrarily set as the lowering limit of the cutting part B, and the operation of lowering the cutting part B beyond the lowering limit level is prevented.

  Further, the combine is configured such that the holding frame 37 can be used to maintain the state in which the elevating cylinder 10 is greatly extended to raise the cutting part B to a high level. That is, when the cutting part B is raised by the extension operation of the elevating cylinder 10 and the engine 2 is stopped, the support pin 33 and the fixed pin 36 are extracted, and the arm about the drive pin 35 as shown in FIG. The body 34 is swung to a position covering the upper side of the elevating cylinder 10, and the end edge of the protruding portion 37A of the holding frame 37 is disposed at a position where it abuts the front end of the cylinder portion 10B of the elevating cylinder 10, and in this state the holding frame The operation of inserting the support pin 33, the fixing pin 36, etc. into the connection hole 37B of 37 is performed.

  By performing such an operation, the holding frame 37 is on the upper surface side of the piston rod 10 </ b> A, and the edge of the protruding portion 37 </ b> A of the holding frame 37 can be brought into contact with the front end portion of the cylinder portion 10 </ b> B of the elevating cylinder 10. Since the support pin 33 and the like that are arranged and inserted into the connection hole 37B of the holding frame 37 in this arrangement state are arranged below the piston rod 10A, the vertical displacement of the holding frame 37 is prevented at this position. . In this state, for example, even if oil leaks from the oil passage system of the elevating cylinder 10, the holding frame 37 and the arm body 34 prevent the piston rod 10A from contracting, and the lowering of the cutting part B is prevented. .

[Mowing clutch]
As shown in FIG. 4, an output pulley 43 is provided on the side surface of the transmission case 3 to extract a rotational force synchronized with the traveling speed. An endless belt 44 is wound around the output pulley 43 and the input pulley 42 described above. Has been. A tension pulley 45, which can be switched between a transmission position where tension is applied to the endless belt 44 and a power cutoff position where tension is released, is rotatably supported on a swing end of a tension arm 46 (an example of an intermittent operation member). Yes.

  The tension arm 46 is swingably supported by an arm shaft 47 in a lateral posture with respect to the cutting portion support base 25, and the operation portion 46 </ b> A of the tension arm 46 and the cutting clutch lever 16 are linked and linked by an operation wire 50. . The input pulley 42, the output pulley 43, the endless belt 44, and the tension pulley 45 supported by the tension arm 46 constitute the cutting clutch 6 described above.

  The reaping clutch lever 16 is supported so as to be swingable around the axis of the horizontal posture while protruding upward from the guide plate 19, and the reaping clutch 6 is set to the engaged state by operating to the entering position “ON”. The interlocking linkage is established via the operation wire 50 so as to set the reaping clutch 6 to the disengaged state by operating to the disengagement position “disconnect” (details of this configuration will be described later). Further, when the mowing clutch lever 16 is operated to the on position “on”, a mechanical linkage mechanism is provided so as to operate the threshing clutch lever 17 to the on position in conjunction with this operation. The threshing clutch lever 17 is configured to be held in the engaged position even when the reaping clutch lever 16 is returned from the engaged position “on” to the cut position “cut”.

  In this combine, when the cutting part B is raised to a height exceeding the set level while the cutting clutch lever 16 is operated to the input position “ON”, the cutting clutch lever 16 is maintained at the input position “ON”. An interlocking operation mechanism G is provided to return the mowing clutch 6 to the engaged state when the mowing clutch 6 is turned off and the mowing portion B is lowered to a level below the set level. The interlock operation mechanism G is also called an auto clutch, and details of the interlock operation mechanism G will be described below.

[Interlocking operation mechanism]
The base end of the cutting clutch lever 16 is connected to the operation shaft 51 in the horizontal orientation, and one end of the arc-shaped operation link 53 is swingable to the swing end of the operation arm 52 swinging integrally with the operation shaft 51. It is connected. The operation wire 50 includes an inner wire 50A and an outer wire 50B. One end portion (upper end in the drawing) of the inner wire 50A is connected to the other end of the operation link 53, and the other end portion of the inner wire 50A. (A lower end in the drawing) is connected to an operation portion 46A of a tension arm 46 (an example of an intermittent operation member). Further, an end portion (hereinafter, referred to as a fixed end portion 50Bf) of the outer wire 50B of the operation wire 50 is supported by the body frame AF, and an end portion (hereinafter, referred to as a mowing clutch side) of the outer wire 50B. The movable end portion 50Bm is supported by the intermediate member 55.

  The intermediate member 55 is disposed below the fixed end portion 50Bf, and is supported so as to be swingable through a shaft body 56 in a lateral orientation with respect to the machine body frame AF. As shown in FIG. It is configured to be switchable between a proximity posture in which 50 Bm is brought close to the operation portion 46A of the tension arm 46 and a separation posture in which it is separated from the operation portion 46A as shown in FIG. The intermediate member 55 is biased by a coil spring 57 toward a separating posture in which the movable end portion 50Bm is separated from the operation portion 46A of the tension arm 46, and the arm portion 55A is integrally formed with the intermediate member 55. ing.

  Further, in the state where the intermediate member 55 is in the separated posture shown in FIG. 4, the outer wire 50B in the region between the fixed end portion 50Bf and the movable end portion 50Bm of the outer wire 50B and the inner wire 50A inside thereof are tensioned. Therefore, the operation of engaging the cutting clutch 6 is realized in accordance with the operation of the engaging position “ON” of the cutting clutch lever 16, and as indicated by the phantom line in FIG. The cutting operation of the mowing clutch 6 is realized.

  In particular, in a state where the intermediate member 55 is in the proximity posture shown in FIG. 5, the outer wire 50B in the region between the fixed end portion 50Bf and the movable end portion 50Bm of the outer wire 50B and the inner wire 50A in the inner wire 50A are relaxed. Therefore, even if the cutting clutch lever 16 is operated to the engaged position “ON” (even if it is already in the engaged position “ON”), the cutting clutch 6 is in the disconnected state.

  The connecting frame 30 of the cutting part B is formed in an inverted U shape with the middle part lifting upward, the front end is connected to the rear surface of the pulling device 22, the rear end is connected to the support frame 26, and the cutting part B It swings up and down as it goes up and down. A guide mechanism 59 is provided on the rear surface side of the rear portion of the connection frame 30, and a rod-like actuating member 60 is interposed between the guide mechanism 59 and the arm portion 55 </ b> A of the intermediate member 55.

  The interlocking operation mechanism G of the present invention includes an operation member 60 whose base end portion is connected to the intermediate member 55, and a guide mechanism 59 provided in the connection frame 30 (reaching portion B).

  The guide mechanism 59 includes a guide portion 59A in a posture along the rear surface of the connection frame 30 (an inclined posture that is directed upward toward the front side), guide walls 59B disposed on both sides of the guide portion 59A, and an upper end of the guide portion 59A. It has a structure in which a regulating member 59C protruding rearward is integrally formed.

  As shown in FIGS. 4 to 6, the operating member 60 includes a rod-shaped operating rod 61, a bearing block 62 that is screwed to the screw portion 61 </ b> A at the tip, and a screw portion 61 </ b> A for fixing the bearing block 62. A fixing nut 63 to be screwed and a roller 65 rotatably supported by a support shaft 64 with respect to the bearing block 62 are provided, and a connecting plate 66 to be connected to the base end portion of the operating rod 61 is provided. The connecting plate 66 is swingably connected to the arm portion 55A by a connecting pin 68 in a lateral orientation, and the roller 65 is disposed at a position where the roller 65 contacts the guide portion 59A of the guide mechanism 59.

  Due to such a configuration, as shown in FIG. 4, when the cutting clutch lever 16 is operated to the input position “ON” while the cutting part B is below the set level, the tension arm 46 is transmitted along with this operation. Since it is operated to the position, the tension pulley 45 is brought into pressure contact with the endless belt 44, so that the cutting clutch 6 can be engaged. Further, when the raising of the cutting part B is started in a state in which the cutting clutch 6 is in the engaged state, the roller 65 of the operating member 60 with respect to the regulating member 59C of the guide mechanism 59 immediately before the cutting part B reaches the set level. The operating member 60 is displaced in the longitudinal direction by the pressing force acting in the longitudinal direction of the operating member 60, and the intermediate member 55 is swung counterclockwise against the biasing force of the coil spring 57. . Then, when the cutting part B reaches the set level due to the rise, the intermediate member 55 reaches the approaching posture, so that the tension arm 46 is operated to the power cut-off position, and the cutting clutch 6 is operated to be disconnected.

  In particular, when the intermediate member 55 swings from the separated posture to the close posture as the mowing portion B rises, the outer wire 50B in the region between the fixed end portion 50Bf and the movable end portion 50Bm of the outer wire 50B, and its A state in which the inner inner wire 50A is relaxed is reached. In order to reduce the tension acting on the tension arm 46 from the inner wire 50A by this relaxation, and allow the displacement of the tension arm 46 to the power shut-off position, the mowing clutch lever 16 is kept in the on position “on” and the mowing is performed. The disengagement operation of the clutch 6 is realized.

  Thereafter, when the cutting part B is lowered to a position lower than the set level, the intermediate member 55 swings in the reverse direction by the urging force of the coil spring 57 and reaches the separated position, so that the cutting clutch 6 returns to the engaged state. .

  In this interlocking operation mechanism G, it is possible to adjust the protrusion amount of the roller 65 with respect to the operating rod 61 by rotating the bearing block 62 screwed into the threaded portion 61A of the operating rod 61. Therefore, by adjusting the protruding amount of the roller 65 and fixing it with the fixing nut 63, it is possible to artificially adjust the setting level of the cutting part B for cutting and operating the cutting clutch 6. Further, since the base end portion of the operating member 60 is swingably connected to the arm portion 55A of the intermediate member 55 via the connecting pin 68, and the roller 65 is inserted into the guide mechanism 59, the operating member 60 is provided. It is also possible to artificially lift the tip side of the roller and keep the roller 65 in a non-operating state in which the roller 65 is separated from the guide mechanism 59. Thus, when held in the non-operating state, the cutting clutch 6 can be held in the engaged state even when the cutting unit B rises above the set level.

  That is, in the work environment where the farm scene is soft and the crawler traveling device 1 sinks greatly, the harvesting part B is maintained at a level higher than the normal work level (to the aircraft level) when performing the harvesting work. In such a situation, the reaping part B may reach a level exceeding the set level during normal work. In order to keep the reaping clutch 6 in the engaged state in such a situation, the operation of the interlocking operation mechanism G is performed as described above. It is comprised so that the member 60 can be set to a non-operation position.

[Operation / Effect of Embodiment]
Thus, when the cutting part B rises above the set level, the interlocking operation mechanism G forcibly operates the cutting clutch 6 from the engaged state to the disconnected state, for example, the traveling machine body A is moved to the headland. The cutting part B is not driven unnecessarily even when it is swung with. Since the interlocking operation mechanism G includes a guide mechanism 59 fixed to the connection frame 30 of the cutting part B, and an operation member 60 that is pressed against the regulating member 59C of the guide mechanism 59. The configuration for operating the mowing clutch 6 is simplified, and high accuracy is not required for assembly, and the assembly is easy with a small number of parts.

  Further, since the guide mechanism 59 is provided for the connecting frame 30 connected to the support frame 26, the total length of the operating member 60 provided between the guide mechanism 59 and the intermediate member 55 can be shortened. It is possible to arbitrarily adjust the setting level at which the cutting clutch 6 is operated by adjusting the protruding amount of the roller 65 with respect to the 60 actuating rods 61 to a screw type. Furthermore, since the roller 65 is provided at the end of the operating rod 61 as the operating member 60 and is configured to be switchable to a posture in which the roller 65 is separated from the guide mechanism 59, the cutting part B rises above the set level. Even in this case, the harvesting operation can be continued by keeping the cutting clutch 6 in the engaged state.

  Furthermore, since the lowering limit of the cutting part B can be set by the stopper 38 and the contact bolt 40, as in the case where the cutting part B is excessively lowered, the inconvenience of causing the weeding tool 21 to come into contact with the field scene and to be damaged. In a state where the cutting part B is raised to a high level, the holding frame 37 is used to mechanically prevent the hoisting cylinder 10 from contracting to raise the cutting part B over a long period of time. Can be maintained.

[Another embodiment]
The present invention may be configured as follows in addition to the above-described embodiment (in this another embodiment, the same functions and functions as those of the above-described embodiment are given the same reference numerals and symbols as those of the embodiment. )

(A) As shown in FIG. 12, a clutch spring 81 that applies a biasing force to the tension arm 46 of the cutting clutch 6 in the clutch engagement direction is provided, and the cutting clutch 6 is operated in accordance with the operation of the cutting clutch lever 16. An operation wire 50 and an intermediate member 55 that is swingably supported by a shaft body 56 are provided. In this other embodiment (a), the interlocking operation mechanism G is configured to include an operation member 60 whose base end portion is connected to the intermediate member 55 and a guide mechanism 59 provided in the connection frame 30 (reaping portion B). The operation wire 50 is also configured similarly to the embodiment.

  In this other embodiment (a), the fixed end 50Bf of the outer wire 50B is supported by the body frame AF and the movable end 50Bm is supported by the intermediate member 55, as in the above-described embodiment. The urging direction of the coil spring 57 that applies the urging force to 55 is set so as to act in the direction in which the operation wire is relaxed, and the inner wire 50A is relaxed when the mowing clutch lever 16 is operated to the on position “on”. When the cutting clutch lever 16 is operated to the cutting position “cutting”, the inner wire 50A is tensioned. When the cutting part B rises above the set level, the actuating member 60 causes the intermediate member 55 to move. The direction of rocking is set in the opposite direction to the embodiment.

  With such a configuration, when the reaping clutch lever 16 is operated to the entering position “ON” while the reaping portion B is below the set level, the inner wire 50A is loosened, so that the reaping clutch is actuated by the urging force of the clutch spring 81. 6 enters the on state. Further, when the cutting clutch lever 16 is set to the cutting position “OFF”, the cutting clutch 6 is turned off against the urging force of the clutch spring 81 by pulling the inner wire 50 </ b> A of the operation wire 50.

  When the cutting part B is raised beyond the set level with the cutting clutch lever 16 set to the ON position “ON”, the intermediate member 55 is swung by the pushing operation force from the operating member 60. In order to tension the outer wire 50B in the region between the fixed end portion 50Bf and the movable end portion 50Bm of the outer wire 50B and the inner wire 50A inside the outer wire 50B by swinging, the mowing clutch lever 16 is moved to the entering position “on”. The cutting operation of the reaping clutch 6 is realized while being maintained.

(B) The intermediate member 55 may be slidably supported along the guide rail, or may be supported movably via a link mechanism. Even with such a configuration, the end portion of the outer wire 50B of the operation wire 50 can be moved and the chopping clutch 6 can be intermittently operated in the same manner as in the embodiment that is swingably supported as in the embodiment.

(C) An endless belt configured such that the reaping clutch 6 is configured as a frictional multi-plate type in which a plurality of friction plates are brought into pressure contact to transmit a driving force and a pressure acting on the friction plates is released to cut off power. The present invention can also be applied to clutches other than the configuration in which power is interrupted by switching the tension acting on 44.

  The present invention can also be used for an ordinary combine as a combine that includes a cutting unit that can be moved up and down on a traveling machine body and includes a cutting clutch that drives and stops the cutting unit.

6 Mowing clutch 16 Mowing clutch lever 46 Intermittent operation member (tension arm)
50 Operation wire 50A Inner wire 50B Outer wire 50Bm End (movable end)
55 Intermediate member 59 Guide mechanism 59C Restricting member 60 Actuating member 65 Roller AF Machine body frame B Cutting part G Interlocking operation mechanism

Claims (2)

A cutting clutch that cuts power transmitted to the cutting unit is provided, and a cutting clutch lever that artificially operates the cutting clutch is provided, and the cutting clutch that is in the engaged state is operated in conjunction with the rising of the cutting unit. A combine equipped with a linked operation mechanism,
The operation wire for transmitting the operating force of the cutting clutch lever to the cutting clutch is configured to include an inner wire and an outer wire, one end of the inner wire is connected to the cutting clutch lever, and the other end Is connected to the intermittent operation member of the reaping clutch, the end portion of the outer wire on the reaping clutch lever side is supported on the body frame, the end portion on the reaping clutch side is supported on the intermediate member,
The intermediate member is supported by the body frame so as to be displaceable in a proximity posture in which an end portion of the outer wire is brought close to the intermittent operation member and a separation posture in which the intermediate member is separated from the intermittent operation member. It is configured to cause the cutting clutch to be turned on and off by moving the outer wire,
The interlock operation mechanism includes a rod-like actuating member whose base end side is linked to the intermediate member, and a regulating member supported by the harvesting unit. The interlock operation mechanism is configured so that the harvesting unit exceeds a set level. The regulating member comes into contact with the distal end portion of the operating member, and the intermediate member is displaced by the pressing force acting in the longitudinal direction of the operating member so as to operate the cutting clutch. Have a combine.   A rotatable roller is provided at the distal end of the actuating member, and the cutting unit is provided with a guide mechanism that allows the roller to move while being in contact with the roller when moving up and down below the set level. The combine according to claim 1, wherein the restriction member is provided at an end of the guide mechanism.

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