JP2006246801A - Controlling and linking structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a controlling and linking structure capable of corresponding to both of a case in which an implement is linked to a main machine through a quick hitch and a case in which the implement is linked to the main machine directly, having improved interchangeability of parts constituting a controlling and interlocking system to facilitate the operation such as assembling operation and part-managing operation so much, and accordingly reducing the cost accompanied therewith. <P>SOLUTION: The controlling and linking structure 100 has a turning member 110, a movable member-side operation member 120, a control member-side operation member 130 and an engaging member 140. When the implement 300 is linked to the main machine 200 through the quick hitch 210, the controlling and interlocking system is constituted by linking the control member-side operation member 130 with the engaging member 140, and when the implement 300 is directly linked to the main machine 200, the control member-side operation member 130 is constituted by linking the control member side operation member 130 to the turning member 110. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention constitutes a control interlocking system between a control member provided on the machine of the working vehicle and a movable member provided on the work machine connected to the machine via a coupling mechanism or directly. It relates to a control coupling mechanism.

  Conventionally, when a work machine such as a rotary cultivator is mounted on a main body of a work vehicle such as a tractor, a mechanism (so-called quick hitch specification) that connects the work machine to the main body via a connection mechanism is employed ( There is a case where a mechanism (so-called direct mounting specification) for directly connecting a work machine to this machine is employed (see Patent Document 2).

  Further, in a work vehicle equipped with a work machine, there is a case where control according to the operation of a movable member provided in the work machine is performed by a control member provided in the machine. More specifically, as described in Patent Document 1 and Patent Document 2, the rotary cultivator is provided with a lift control member (for example, a lift control valve or a potentiometer sensor) as a control member provided in the tractor main unit. There is a case where the vertical tiller control (so-called tilling depth control) of the rotary tiller is performed according to the rotation amount of the rear cover as the provided movable member.

When a quick hitch specification is adopted in a working vehicle that performs such plowing depth control, for example, as described in Patent Document 1, an interlocking wire 48 (connected to the lift control valve 28 on the tractor main unit side) ( Hereinafter, the control interlocking system is configured by connecting an “A operation member”) and an interlocking wire 42 (hereinafter referred to as “B operation member”) connected to the rear cover 33 on the rotary tiller side. Further, when the direct mounting specification is adopted, for example, as described in Patent Document 2, the potentiometer 10 on the tractor main unit side and the rear cover 9 on the rotary tiller side are connected to a single wire 36 ( (Hereinafter referred to as “C operation member”) to form a control interlocking system.
JP 2001-78505 A JP 2001-258304 A

  However, in the conventional configuration as described above, the components (for example, A operation member, B operation member) that constitute a control interlocking system between the work vehicle adopting the quick hitch specification and the work vehicle adopting the direct mounting specification. And C operation members, etc.) are low in compatibility, and therefore, specialized parts for each specification (for example, in the case of quick hitch specification, dedicated parts such as A operation member and B operation member, direct installation specification) Need special parts such as C operation members), and the work such as assembly work and parts management becomes complicated accordingly, and the cost associated with it becomes high.

  The present invention has been made in view of the above-described prior art, and corresponds to both a case where the work machine is connected to the machine via a connection mechanism and a case where the work machine is directly connected to the machine. A control coupling mechanism that can improve the compatibility of the components that make up the control interlocking system, facilitate the work of assembling work and parts management, and thus reduce the costs associated with it. The issue is to provide.

In order to solve the above problems, the present invention provides the following first and second control coupling mechanisms.
(1) 1st control connection mechanism Between the control member provided in this machine of a working vehicle, and the movable member provided in the work machine connected to this machine via a connection mechanism or directly A control connection mechanism that constitutes a control interlocking system, wherein the rotary member is pivotally supported by a work machine, and the movable member side is connected to the movable member at the base end and to the rotary member at the distal end. An operation member, a control member side operation member whose base end is connected to the control member, and an engagement member pivotally supported by the connection mechanism, wherein the rotation is performed at a position displaced from the rotation center. An engaging member engageable with the member, the rotating member having an engaging portion engageable with the engaging member at a position displaced from the rotation center, and the movable member side operation member The movable member side mounting portion to which the front end portion of the control member can be connected, and the control member side to which the front end portion of the control member side operation member can be connected An attachment portion is provided, and the engagement member is provided with an attachment portion to which the tip end portion of the control member side operation member can be connected at a position displaced from the rotation center, and the working machine is connected to the engagement member. When connected to the machine via a mechanism, the tip of the control member side operation member is connected to the mounting part of the engagement member to form the control interlocking system, and the work machine is directly When connecting to the machine, the control member side operation member is connected to the control member side mounting portion of the rotating member to constitute the control interlocking system. Control coupling mechanism.

(2) Second control connection mechanism Between a control member provided on the machine of the working vehicle and a movable member provided on the work machine connected to the machine via the connection mechanism or directly. A control connection mechanism that constitutes a control interlocking system, wherein the rotary member is pivotally supported by a work machine, and the movable member side is connected to the movable member at the base end and to the rotary member at the distal end. An operation member; and a control member-side operation member having a base end portion connected to the control member, and the rotation member is pivotally supported by the connection mechanism at a position displaced from the rotation center. An engaging portion that can be engaged with the joint member, a movable member-side mounting portion that can be connected to the distal end portion of the movable member-side operation member, and a control member-side mounting portion that can be connected to the distal end portion of the control member-side operating member When the work machine is connected to the machine via a connection mechanism, the control member The tip of the side operation member is connected to the engagement member at a position displaced from the rotation center of the engagement member to form the control interlocking system, and the work machine is directly connected to the machine. In this case, the control coupling mechanism is configured such that a tip end portion of the control member side operation member is coupled to the control member side mounting portion of the rotating member to constitute the control interlocking system.

  In the first and second control connection mechanisms according to the present invention, when the work machine is connected to the machine via the connection mechanism, the base end portion is connected to the control member when the work machine is connected to the machine. In a state where the distal end portion of the operation member is connected to the attachment portion of the engaging member, and the working machine is connected to the main unit via a connecting mechanism, the engaging portion of the rotating member is engaged. Engaged with the member, the control interlocking system is thus constructed. At this time, the movable member and the rotating member are connected by the movable member side operation member. On the other hand, when the working machine is directly connected to the machine, the distal end portion of the control member-side operation member whose base end portion is connected to the control member is the control member of the rotating member. It is connected to the side mounting portion, and thus the control interlocking system is configured. Also at this time, the movable member and the rotating member are connected by the movable member-side operation member.

  As described above, according to the first and second control coupling mechanisms according to the present invention, when the working machine is coupled to the machine via the coupling mechanism, the tip end portion of the control member side operation member is moved. The control interlocking system is configured by being connected to the attachment portion of the engagement member, and when the working machine is directly connected to the machine, the distal end portion of the control member side operation member is moved to the rotation. Since the control interlocking system is configured by connecting to the control member side mounting portion of the moving member, when the work machine is connected to the machine via a connection mechanism, the work machine is directly connected to the machine. Any of the cases can be handled.

  In addition, the control member side operation member and the movable member side operation between the case where the work machine is connected to the machine via a connection mechanism and the case where the work machine is directly connected to the machine. Since members can be shared, operation members (specialized parts) such as “B operation member” and “C operation member” as described in the section of “Background Art” can be eliminated, and thus a control interlocking system is configured. The compatibility of parts can be improved, and the operations such as assembling work and parts management can be facilitated, and the costs associated therewith can be reduced.

  It is preferable that a plurality of at least one attachment portion is provided among the movable member side attachment portion, the control member side attachment portion, and the engagement member in the rotation member. By doing so, the sensitivity adjustment of the control member can be realized with a simple configuration. In addition, you may comprise all the connection mechanisms of the said movable member side attaching part of the said rotation member, the said control member side attaching part, and the said attaching part of the said engagement member in the same thing.

  In the first and second control coupling mechanisms according to the present invention, it is preferable that the engagement member is urged toward one side in the rotation direction of the engagement member. In this case, the engagement member can engage the engagement portion of the rotation member only on one side in the rotation direction of the engagement member, and the work machine is connected to the machine via a connection mechanism. Smooth connection can be realized with a simple configuration.

  Further, in the first and second control connection mechanisms according to the present invention, the rotating member is connected to the engagement member of the machine when the work machine is connected to the machine via the connection mechanism. It is preferable to be disposed so as to be coaxial. By doing so, the engagement between the engaging member and the engaging portion of the rotating member can be reliably performed.

  The working machine is a rotary cultivator comprising a main cover that covers the top of the tillage part, and a rear cover that is rotatably connected to the main cover so as to cover the rear of the tillage part, A rotary tiller whose member is the rear cover can be exemplified, and as the control member, an elevation control member for controlling elevation of a lift arm provided in the main unit can be exemplified. In this case, the movable member side operation member can be exemplified by a rod or push-pull wire that can be pushed and pulled according to the rotation of the rear cover.

  As described above, according to the first and second control coupling mechanisms according to the present invention, when the working machine is coupled to the machine via the coupling mechanism, the tip end portion of the control member side operation member Is connected to the attachment portion of the engaging member to constitute the control interlocking system, and when the work implement is directly connected to the main assembly, the tip end portion of the control member side operation member is Since the control interlocking system is configured by being connected to the control member side mounting portion of the rotating member, when the work machine is connected to the machine via a connection mechanism, the work machine is directly connected to the machine. Any of the cases of connection can be handled.

  In addition, the control member side operation member and the movable member side operation between the case where the work machine is connected to the machine via a connection mechanism and the case where the work machine is directly connected to the machine. Since members can be shared, operation members (specialized parts) such as “B operation member” and “C operation member” as described in the section of “Background Art” can be eliminated, and thus a control interlocking system is configured. The compatibility of parts can be improved, and the operations such as assembling work and parts management can be facilitated, and the costs associated therewith can be reduced.

  Further, when at least one mounting portion is provided among the movable member-side mounting portion, the control member-side mounting portion, and the engaging member in the engaging member in the rotating member, the control member Can be realized with a simple configuration.

  Further, when the engaging member is biased toward one side in the rotation direction of the engagement member, the engagement member rotates the engagement portion of the rotation member. Engagement can be performed only on one side of the direction, and smooth connection can be realized with a simple configuration when the working machine is connected to the machine via a connection mechanism.

  Furthermore, when the rotating member is disposed so as to be coaxial with the engaging member of the machine when the working machine is connected to the machine via a connection mechanism, Engagement between the engaging member and the engaging portion of the rotating member can be reliably performed.

  Hereinafter, a preferred embodiment of a control coupling mechanism according to the present invention will be described with reference to the accompanying drawings. 1 and 2 are side views showing a state in which a work machine 300 is attached to a main machine 200 of a work vehicle to which the control coupling mechanism 100 according to the embodiment of the present invention is applied. FIG. FIG. 2 is a view showing a state in which the work machine 300 is connected to the machine 200 via a connection mechanism 210, and FIG. 2 is a view showing a state in which the work machine 300 is directly connected to the machine 200. . In the present embodiment, the working vehicle is a tractor, and the working machine 300 is a rotary tiller.

  In the tractor main body 200 shown in FIGS. 1 and 2, a bonnet 6 is disposed at the front of a main body that suspends the front wheel 1 and the rear wheel 2 in the front and rear, and an engine 5 is disposed inside the bonnet 6. . A steering handle 10 is disposed in front of the driver's seat 11.

  A transmission case 50 is disposed behind the engine 5, and the power from the engine 5 is transmitted to the transmission case 50 to change speed, and the driving force is transmitted to the rear wheel 2 and the front wheel 1. Has been. Further, a part of the power from the engine 5 is transmitted to the rotary tiller 300 through the universal joint 16 or the like from the PTO shaft 15 protruding from the rear surface of the transmission case 50 and driven.

  A work implement mounting device 220 is provided at the rear of the tractor main unit 200. The work machine mounting device 220 includes a top link 221, a pair of left and right lower links 222, and the like, and a lift arm 223 provided on a vehicle width direction side portion of a hydraulic case 51 disposed on the transmission case 50. The rotary cultivator 300 can be turned up and down by rotating the lift arm 223 up and down by expansion and contraction of a hydraulic cylinder (not shown) in the hydraulic case 51. It is said. More specifically, a lift control member 52 (an example of a control member (specifically a lift control valve)) for controlling the lift of the lift arm 223 is provided on the hydraulic case 51. The lift control valve 52 Thus, the hydraulic cylinder of the hydraulic circuit (not shown) can be expanded and contracted in the hydraulic case 51, whereby the lift arm 223 connected to the hydraulic cylinder can be rotated up and down.

  In the work vehicle shown in FIG. 1, the rotary tiller 300 is mounted on the work machine mounting device 220 of the tractor main body 200 via the connection mechanism 210 provided in the device 220.

  3 is an exploded perspective view showing a main configuration of the coupling mechanism 210 shown in FIG. 1, and FIG. 4 is an exploded perspective view for explaining a coupling portion with the coupling mechanism 210 of the rotary tiller 300 shown in FIG. is there.

  As shown in FIG. 3, the connecting mechanism 210 can be connected to a hitch frame 211 having an inverted U shape in a rear view and a bearing hole provided in a free end portion of the top link 221 via a pin 215. A top link engaging part 216 provided on the upper part of the hitch frame 211 and an upper engaging part 212 provided on the upper part of the hitch frame 211, which are provided on an upper arm 301 (to be described later) of the rotary tiller 300. The upper locking portion 212 formed with an upper locking groove 212a that opens upward so as to be able to engage with the formed top link pin 308 (see FIG. 4), and the bearing holes of the pair of lower links 222 are engaged. A pair of left and right lower link locking members 218, a pair of lower locking portions 217 provided at a pair of left and right lower ends of the hitch frame 211, And a pair of hook-shaped operating member 214 corresponding respectively to the lower locking portion 217 of the pair. In FIG. 3, the lower link locking member 218 and the hook-like operation member 214 on one side are not shown.

  Further, the pair of lower locking portions 217 are respectively provided rearward so as to be engaged with a pair of left and right lower link pins 111 (see FIG. 4) provided on a support member 303a described later of the rotary tiller 300. A lower locking groove 217a to be opened is formed. The operation member 214 is engaged with the lower locking groove 217a and a release position for opening the lower locking groove 217a so as to allow the lower link pin 111 to access the lower locking groove 217a. In order to prevent the lower link pin 111 from being detached, the lower locking groove 217a can be held at a closed position.

  In the illustrated coupling mechanism 210, the pair of lower link locking members 218 are fixed to the pair of lower locking portions 217, respectively. The pair of lower link locking members 218 support the corresponding operation members 214 in a swingable manner, and the operation members 214 are disposed on the hook side with the locking members 218 interposed therebetween in the vehicle front-rear direction. The lever member 214a locked to the opposite end can take the release position and the holding position around the pivot shaft, and the biasing member 214b is directed toward the holding position. It is energized.

  As shown in FIG. 4, the rotary cultivator 300 includes the above-described upper arm 301 and a rotor case 303, and the connecting mechanism 210 is inserted into a pin mounting hole 301 a provided at the front upper end portion of the upper arm 301. The top link pin 308 that can be engaged with the upper locking groove 212a is attached. Further, the rotor case 303 is provided with a pair of left and right main beams 305 projecting on both sides in the vehicle width direction, and a support member 303a is disposed on the outer ends of the pair of main beams 305 in the vehicle width direction. The lower link pin 111 that can be engaged with the pair of lower locking grooves 217a of the coupling mechanism 210 is attached to a pin attachment hole 303c provided at the front end of the support member 303a. Yes. Further, the universal joint 16 or the like is inserted through the center of the hitch frame 211 in the vehicle width direction.

  In this way, in the working vehicle shown in FIG. 1, the rotary tiller 300 is connected via the connecting mechanism 210 so as to be easily attached to and detached from the working machine mounting device 220 of the tractor main machine 200 (so-called quick sowing). Hitch specification) is adopted. Hereinafter, the connecting mechanism 210 is referred to as a quick hitch.

  In the work vehicle shown in FIG. 2, the rotary tiller 300 is directly mounted on the work machine mounting device 220 of the tractor main machine 200. That is, the rotary tiller 300 employs a mechanism (so-called direct mounting specification) in which the rotary tiller 300 is directly connected by the top link 221 and the lower link 222 without using the quick hitch 210 as shown in FIGS. ing.

  A rotary cultivator 300 shown in FIGS. 1 and 2 is configured as a center drive type rotary cultivator including the rotor case 303 provided at a substantially central portion in the vehicle width direction. In the center drive rotary cultivator 300, the driving force from the engine 5 in the tractor main unit 200 is transmitted to the input shaft 304 protruding forward from the rotor case 303 through the universal joint 16 and the like, The driving force transmitted to the input shaft 304 is transmitted to a tilling claw shaft 307 projecting left and right in the vehicle width direction at the lower portion of the rotor case 303 by a power transmission mechanism such as a chain in the rotor case 303. . Further, tilling claws (not shown) are radially arranged on the tilling claw shaft 307 at predetermined intervals, and the tilling claws are arranged on the tilling claw shaft by a power transmission mechanism in the rotor case 303. It is configured to be rotationally driven by the power transmitted to 307.

  A rotary cover 310 is provided below the rotor case 303. The rotary cover 310 includes a main cover 320 that covers the top of the tillage portion 302 and a rear cover 330 (an example of a movable member) that covers the rear of the tillage portion 302.

  The main cover 320 covers the top of the tilling portion 302, and the rear cover 330 is rotatably connected to the main cover 320 so as to cover the rear of the tilling portion 302. More specifically, the rear cover 330 has a leveling member 331 for leveling the soil behind the tillage portion 302, and the leveling member 331 moves up and down in response to changes in the height of the soil. The main cover 320 is rotatably connected to the main cover 320 via a pivot shaft 332 so as to be movable. Further, the rear cover 330 is provided with a connecting portion 333 so that a base end portion 120a of a movable member side operation member 120 described later can be rotatably connected at a position displaced from the rotation center.

  The control coupling mechanism 100 constitutes a control interlocking system between the elevation control valve 52 provided on the tractor main unit 200 and the rear cover 330 provided on the rotary tiller 300.

  5 is a schematic enlarged side view mainly showing the control connection mechanism 100 portion of the work vehicle shown in FIGS. 1 and 2, and FIG. 5A is the control connection in the work vehicle of the quick hitch specification shown in FIG. FIG. 5B shows the mechanism 100 portion, and FIG. 5B shows the control coupling mechanism 100 portion in the directly mounted working vehicle shown in FIG. 6 is an exploded perspective view showing a schematic configuration of a rotation member 110, a control member side operation member 130, and an engagement member 140, which will be described later, and FIG. 7 shows the movable member side operation member 120 as a rear cover 330 and a rotation member. FIG.

  As shown in FIGS. 4 to 6, the control coupling mechanism 100 includes a rotation member 110, the movable member side operation member 120, a control member side operation member 130, and an engagement member 140. . The engaging member 140 may not be provided in the control coupling mechanism 100. The rotary cultivator 300 is connected to the tractor main unit 200 as shown in FIG. 5A via the quick hitch 210. You may provide in this quick hitch 210 at the time of connecting.

  The rotating member 110 is pivotally supported by the rotary tiller 300. More specifically, in this embodiment, the rotating member 110 has a pair of left and right main beams 305 on the side of the rotor case 303 in the rotary tiller 300 in the vehicle width direction, as shown in FIG. Are pivotally supported by a pair of left and right lower link pins 111 extending in the vehicle width direction at the front end of the support member 303a provided through the support member 303a. It has the extended part 112 extended. The extending portion 112 of the rotating member 110 includes an engaging portion 112a that can be engaged with the engaging member 140 at a position displaced from the rotation center, and a distal end portion of the movable member-side operation member 120. A movable member side mounting portion 112b to which 120b can be connected and a control member side mounting portion 112c to which the tip end portion 130b of the control member side operation member 130 can be connected are provided. In this embodiment, the control member side mounting portion 112c is a hole for mounting the control member side operation member 130 tip portion 130b provided at the rotation side end portion of the extending portion 112, and the movable member side mounting portion. In this embodiment, 112b is the movable member side operation member 120 front end portion 120b mounting hole provided in the extending portion 112 closer to the rotation center than the control member side mounting portion 112c. In the present embodiment, the portion 112a is a projecting portion that extends inward in the vehicle width direction and is provided closer to the rotation center than the movable member side mounting portion 112b in the extended portion 112.

  The movable member side operation member 120 has the base end portion 120 a connected to the rear cover 330 and the tip end portion 120 b connected to the rotating member 110. More specifically, in this embodiment, the movable member side operation member 120 is a rod that can be pushed and pulled according to the rotation of the rear cover 330, as shown in FIG. 7, and the base end portion 120a. Is attached to the connecting portion 333 of the rear cover 330 so as to be rotatable about a pivot shaft along the vehicle width direction, and the tip portion 120b is bent outward in the vehicle width direction, and the bent portion 120b is rotated. The movable member side operation member 120 of the member 110 is engaged with the front end portion 120b mounting hole 112b. The movable member side operation member 120 may be a push-pull wire that can be pushed and pulled according to the rotation of the rear cover 330. 7 shows a state in which the tip end portion 130b of the control member side operation member 130 is connected to the control member side operation member 130 tip portion 130b mounting hole 112c.

  The control member side operation member 130 has a base end portion 130a connected to the elevation control valve 52 (see FIGS. 1 and 2). More specifically, as shown in FIG. 6, the control member side operation member 130 includes a wire 131 and a wire tube 132 through which the wire 131 is slidably inserted in the axial direction. The base end portion 130 a of the wire 131 is attached to an operating mechanism 53 that operates the elevation control valve 52. The turning mechanism 53 includes a swing arm 53a pivotally supported around the first fulcrum P1 and an operating arm 52a pivotally supported around the second fulcrum P2. The swing arm 53a includes a connecting portion 531a that rotatably connects the base end portion 130a of the wire tube 132 at one end, and the connecting portion 531a opposite to the connecting portion 531a with the first fulcrum P1. It has the engaging part 532a engaged with the action | operation arm 53b. Further, the swing arm 53a is biased by a biasing member (not shown) in a direction opposite to the direction in which the swing arm 53a is engaged with the operating arm 53b (the direction of the arrow Y1 in the figure). The operating arm 52a has an engaged portion 521a that is engaged with the engaging portion 532a of the swing arm 53a on the rotating side from the second fulcrum P2. The lifting control valve 52 can control the lifting and lowering of the lift arm 223 by swinging the operating arm 52a in the direction of arrow Y in the figure.

  As shown in FIG. 5 (A), the engaging member 140 is pivotally supported by the quick hitch 210 and can be engaged with the turning member 110 at a position displaced from the turning center. Part 143a. More specifically, in the present embodiment, the engagement member 140 is a vehicle at a vehicle rear end portion of a support member 219 provided on a side portion in the vehicle width direction of the quick hitch 210 as shown in FIG. A first extending portion 142 that is pivotally supported by a pivot shaft 141 extending in the width direction and extends forward and obliquely upward from the pivot shaft 141, and the vehicle from the pivot shaft 141. And a second extending portion 143 that extends rearward and obliquely downward. The first extending portion 142 of the engaging member 140 is provided with a mounting portion 142a to which the tip portion 130b of the control member side operation member 130 can be connected at a position displaced from the rotation center. The second extending portion 143 is provided with the engaging portion 143a at a position displaced from the rotation center. In the present embodiment, the attachment portion 142a is a hole for attaching the tip 130b of the control member side operation member 130 provided at the rotation side end portion of the first extension portion 142, and the engagement portion 143a is In the present embodiment, the second extending portion 143 is a protruding portion that is provided at the rotation side end and extends outward in the vehicle width direction.

  The lower link pin 111 of the rotating member 110 is connected to the engaging member 140 of the tractor main unit 200 when the rotary tiller 300 is connected to the tractor main unit 200 via the quick hitch 210. It is preferable to be disposed so as to be coaxial with the pivot shaft 141. The movable member side mounting portion 112b, the control member side mounting portion 112c, and the mounting portion 142a may be provided one by one, but the movable member side mounting portion 112b and the control member side mounting portion may be provided. At least one mounting portion of the portion 112c and the mounting portion 142a is provided at a plurality of locations (in this embodiment, as shown in FIGS. 5A and 6, the mounting portion 142a is provided at a plurality of locations on the engagement member 140, or 4 and 5B, the movable member side mounting portion 112b and the control member side mounting portion 112c are provided at a plurality of positions on the rotating member 110.

  Further, as shown in FIG. 5A, the engaging member 140 is urged by the urging member 150 toward one side of the engaging member 140 in the rotation direction (the arrow X1 direction in the drawing). . More specifically, in this embodiment, the biasing member 150 is a winding spring in which both end portions 151 and 152 protrude from the winding portion by a predetermined amount as shown in FIG. The one end portion 151 has the first extending portion 142 so as to urge the engaging member 140 in a direction X1 opposite to the rotation direction of the engaged engaging member 140 (the arrow X2 direction in the drawing). In addition, the winding portion is fitted into the pivot shaft 141 in a state where the other end portion 152 is locked to the support member 219.

  In the control connection mechanism 100 described above, when the rotary tiller 300 is connected to the tractor main body 200 via the quick hitch 210, the base end portion 130a is connected to the lift control valve 52. In a state where the tip portion 130b of the push-pull wire 130 is connected to the mounting portion 140a of the engaging member 140, and the rotary tiller 300 is connected to the tractor main unit 200 via the quick hitch 210, The engaging portion 112a of the rotating member 110 is engaged with the engaging portion 143a of the engaging member 140, and thus the control interlocking system is configured so that the elevation control valve 52 is interlocked. At this time, the rear cover 330 and the rotating member 110 are connected by the rod 120. On the other hand, when the rotary cultivator 300 is directly connected to the tractor main unit 200, the distal end portion 130b of the push-pull wire 130 in which the base end portion 130a is connected to the elevation control valve 52, The control interlocking system is configured to be connected to the control member side mounting portion 112c of the rotating member 110, and thus to switch and interlock the elevation control valve 52. Also at this time, the rear cover 330 and the rotating member 110 are connected by the rod 120.

  As described above, according to the control connection mechanism 100, when the rotary tiller 300 is connected to the tractor main unit 200 via the quick hitch 210, the tip 130b of the push-pull wire 130 is connected to the engagement portion. When the rotary cultivator 300 is directly connected to the tractor main unit 200, the distal end portion of the push-pull wire 130 is configured by connecting to the mounting portion 140a of the joint member 140 to constitute the control interlocking system. Since 130b is connected to the control member side mounting portion 112c of the rotating member 110 to constitute the control interlocking system, the rotary tiller 300 is connected to the tractor main unit 200 via the quick hitch 210. Both the case and the case where the rotary tiller 300 is directly connected to the tractor main unit 200 Rukoto can.

  Also, between the case where the rotary tiller 300 is connected to the tractor main unit 200 via the quick hitch 210 and the case where the rotary tiller 300 is directly connected to the tractor main unit 200, Since the push-pull wire 130 and the rod 120 can be shared, operation members (specialized parts) such as “B operation member” and “C operation member” as described in the section of “Background Art” can be eliminated. Therefore, the compatibility of the components constituting the control interlocking system can be improved, and the operations such as the assembly work and the parts management can be facilitated, and the costs associated therewith can be reduced.

  In addition, since the attachment portion 142a is provided at a plurality of locations on the engagement member 140, the sensitivity adjustment of the elevation control valve 52 can be realized with a simple configuration.

  Further, since the engaging member 140 is urged toward the one side X1 in the rotational direction of the engaging member 140 by the winding spring 150, the engaging portion 143a of the engaging member 140 is connected to the rotating member 110. The engaging portion 112a can be engaged only on one side of the engaging portion 143a in the rotation direction of the engaging member 140, and the rotary cultivator 300 is connected to the tractor main unit 200 via the quick hitch 210. When being connected to each other, smooth connection can be realized with a simple configuration.

  Further, the lower link pin 111 of the rotating member 110 is connected to the engaging member 140 of the tractor main unit 200 when the rotary tiller 300 is connected to the tractor main unit 200 via the quick hitch 210. Since it is disposed so as to be coaxial with the pivot shaft 141, the engagement portion 143a of the engagement member 140 and the engagement portion 112a of the rotating member 110 are reliably engaged. be able to.

FIG. 1 is a side view showing a state in which a work machine is attached to a main body of a work vehicle to which a control coupling mechanism according to an embodiment of the present invention is applied. The work machine has a quick hitch attached to the main machine. It is a figure which shows the state (what is called a quick hitch specification) connected via the. FIG. 2 is a side view showing a state in which the work machine is attached to the machine of the work vehicle to which the control coupling mechanism according to the embodiment of the present invention is applied, and the work machine is directly attached to the machine. It is a figure which shows the state (what is called direct mounting specification) connected. FIG. 3 is an exploded perspective view showing a main configuration of the coupling mechanism shown in FIG. FIG. 4 is an exploded perspective view for explaining a connecting portion with the connecting mechanism of the rotary tiller shown in FIG. 1. 5 is a schematic enlarged side view mainly showing the control connection mechanism portion of the work vehicle shown in FIGS. 1 and 2, and FIG. 5A is a control connection mechanism in the work vehicle of the quick hitch specification shown in FIG. FIG. 5 (B) shows the control connection mechanism portion in the work vehicle of the direct mounting specification shown in FIG. FIG. 6 is an exploded perspective view showing a schematic configuration of the rotation member, the control member side operation member, and the engagement member. FIG. 7 is a schematic plan view showing a state in which the movable member side operation member is connected to the rear cover and the rotating member.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Control connection mechanism 110 ... Turning member 112a ... Engagement part of turning member
112b ... Moving member side mounting portion of the rotating member 112c ... Control member side mounting portion of the rotating member
120 ... Rod (an example of a movable member side operation member)
120a: Base end portion of movable member side operation member 120b: Tip end portion of movable member side operation member
130: Control member side operation member 130a: Base end portion of control member side operation member
140 ... engaging member 140a ... mounting portion of the engaging member 150 ... urging member
200 ... This machine 207b of working vehicle ... Lift control member (an example of a control member)
210 ... Quick hitch 300 ... Rotary cultivator (an example of a working machine)
320 ... main cover 330 ... rear cover (an example of a movable member)
X1... One side of the engaging member in the rotation direction

Claims (7)

A control connection mechanism that constitutes a control interlocking system between a control member provided in the machine of the working vehicle and a movable member provided in the work machine connected to the machine via a connection mechanism or directly. Because
A rotating member pivotally supported by the work implement;
A movable member-side operation member having a base end connected to the movable member and a distal end connected to the rotating member;
A control member-side operation member having a base end connected to the control member;
An engagement member pivotally supported by the coupling mechanism, the engagement member being engageable with the rotation member at a position displaced from the rotation center;
The rotating member includes an engaging portion engageable with the engaging member at a position displaced from the rotation center, and a movable member side mounting portion to which a distal end portion of the movable member side operation member can be connected. A control member side mounting portion to which a tip end portion of the control member side operation member can be connected is provided,
The engagement member is provided with a mounting portion that can be connected to the tip of the control member side operation member at a position displaced from the rotation center,
When the work machine is connected to the machine via a connection mechanism, the control interlock system is configured by connecting the tip of the control member-side operation member to the attachment part of the engagement member,
When the working machine is directly connected to the machine, the control interlocking system is configured by connecting the tip of the control member side operation member to the control member side mounting portion of the rotating member. A control coupling mechanism characterized by that. A control connection mechanism that constitutes a control interlocking system between a control member provided in the machine of the working vehicle and a movable member provided in the work machine connected to the machine via a connection mechanism or directly. Because
A rotating member pivotally supported by the work implement;
A movable member-side operation member having a base end connected to the movable member and a distal end connected to the rotating member;
A control member-side operation member having a base end connected to the control member;
An engaging portion that can be engaged with an engaging member pivotally supported by the connecting mechanism and a distal end portion of the movable member-side operation member can be connected to the rotating member at a position displaced from the rotation center. A movable member side mounting portion, and a control member side mounting portion to which a tip end portion of the control member side operation member can be connected, are provided.
When the working machine is coupled to the machine via a coupling mechanism, the distal end portion of the control member-side operation member is moved to the engagement member at a position displaced from the rotation center of the engagement member. Connected to form the control interlock system,
When the working machine is directly connected to the machine, the control interlocking system is configured by connecting the tip of the control member side operation member to the control member side mounting portion of the rotating member. A control coupling mechanism characterized by that.   The at least one attaching part is provided in two or more places among the said movable member side attaching part in the said rotation member, the said control member side attaching part, and the said attaching part in the said engagement member. 2. The control coupling mechanism according to 2.   The control coupling mechanism according to any one of claims 1 to 3, wherein the engagement member is biased toward one side in a rotation direction of the engagement member.   The rotating member is disposed so as to be positioned coaxially with the engaging member of the machine when the work machine is connected to the machine via a connection mechanism. The control coupling mechanism according to any one of claims 1 to 4.   The working machine is a rotary cultivator comprising a main cover that covers an upper portion of a tilling portion and a rear cover that is rotatably connected to the main cover so as to cover the rear of the tilling portion, and the movable member. 6 is a rotary tiller that is the rear cover, and the control member is a lifting control member that controls the lifting and lowering of a lift arm provided in the main unit. Control coupling mechanism. The control connection mechanism according to claim 6, wherein the movable member side operation member is a rod or a push-pull wire that can be pushed and pulled according to the rotation of the rear cover.

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