JPH03254601A - Detection system interlocking device - Google Patents

Abstract

PURPOSE:To facilitate the handling of a working machine when the working machine is attached or detached, by disposing an electric signal-generating member on the side of a tractor and enabling to mechanically simultaneously attach or detach a detection system on the attachment or detachment of the working machine. CONSTITUTION:An operating link is disposed near a connection member, and a reacting link 80 interlocked with an electric signal-generating member 89 on the side of a tractor is disposed on the side of a connecting frame 12 to freely attach or detach to an operating link 67 when attached or detached. When a working machine is detached, the connection frame 12 is separated from the connection member to detach the operating link from the reacting link.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a detection system interlocking device for a tractor working machine.

(Prior Art) A work equipment coupling device that removably attaches a working machine, such as a rotary device, to the rear of a tractor is provided with a coupling frame at the rear end of a three-point linkage mechanism, and this coupling frame is provided with an upper coupling of the rotary device. a pair of left and right fitting holders that removably fit into a pair of left and right lower connecting parts from the front side, and a lower connection in each of the fitting holders. Some devices are equipped with a pair of left and right locking members that irremovably lock the parts.

In a rotary device attached to a tractor via this type of work equipment connection device, the vertical movement of the rear cover (detection section) is detected by a potentiometer (electrical signal generation section), and a hydraulic device is activated at three points according to the detection signal. When controlling depth so that the plowing depth of the rotary device is constant by raising and lowering the link mechanism, conventionally, a potentiometer is attached to the machine frame side of the rotary device, and this potentiometer is connected to the tractor side via electrical wiring. In addition to connecting to the control circuit,
A connector is provided in the middle of the wiring so that it can be separated into the tractor side and the working machine side.

(Problem to be Solved by the Invention) In conventional devices, the rotary device can be easily attached and detached, but the electrical wiring connectors have to be manually attached and detached, which is a drawback that handling is troublesome. . Furthermore, if the rotary device is removed from the tractor without removing the connectors, there may be problems such as damage to the connections or disconnection of the electrical wiring.

In view of this, the present invention provides an electric signal generating section on the tractor side so that the detection system can be mechanically attached and detached at the same time when the working machine is attached and detached, thereby simplifying handling when attaching and detaching the working machine. The purpose is to

(Means for Solving the Problems) As a first means, the present invention includes a connecting frame 12 at the tip of the three-point link mechanism 7, and a working machine attached to the connecting frame 12.
In the work implement coupling device for a tractor, in which the connecting parts 24 and 29 of the tractor 3 are detachably connected, an operating link 67 that interlocks with the detecting part 63 of the working implement 13 is provided near the connecting part 29, and The connecting frame 1 is designed such that the response link 80 that is linked to the electric signal generating section 89 can be attached to and detached from the operating link 67 when the connecting frame 12 and the connecting section 29 are attached and detached.
It is installed on the second side.

Furthermore, as a second means, in addition to the first means, an engaging recess 80a is provided in one of the operating link 67 and the response link 80, and the engaging recess 80a is removably engaged with the engaging recess 80a. A mating engaging portion 68 is provided on the other side.

Furthermore, the present invention provides, as a third means, in addition to the first means, a spring that is installed at the bottom of the tank so that the operating link 67 and the response link 80 come into contact with each other when they are connected, and that biases the response link 80 in the direction of contact. 93 is provided.

(Function) When connecting the connecting frame 12 to the connecting portion 24, 29 of the working machine 13, the operating link 67 and the response link 80 are simultaneously connected in an interlocking state. Therefore, the detection unit 63 of the work machine 13
When the tractor moves, the electric signal generator 89 of the tractor operates via the actuating link 67 and the response link 80, and outputs an electric signal.

When removing the work implement 13, the connecting frame 12 is removed from the connecting portion 24°29, and the operating link 67 and response link 8 are simultaneously removed.
0 is off. Therefore, when the working machine 13 is attached and detached, the detection system can be attached and detached at the same time.

Further, the operating link 67 and the response link 80 are connected to the engaging portion 83a.
By engaging the two through the engaging portion 68, it is possible to reliably interlock the two.

Further, by adopting a structure in which the operating link 67 and the response link 80 are in contact with each other, and by biasing the response link 80 in the direction of contact by the spring 93, it is possible to interlock the two with a simple structure.

(Example) Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

In FIG. 9, 1 is a tractor, and the rear side of the vehicle body 2 includes a hydraulic system 3 for lifting and lowering the working machine, a driver's seat 4, rear wheels 5,
A PTO shaft 6, a three-point link mechanism 7, etc. are provided. The hydraulic system 3 has a pair of left and right lift arms 8, and the three-point linkage mechanism 7 includes a top link 9 and a pair of left and right lower links 10, each of which is connected to a lift via a lift rod 11. It is connected to arm 8. A connecting frame 12 having an A-shape in front view is provided at the rear end of the three-point linkage mechanism 7, and a rotary mechanism (work machine) 13 is attached to this connecting frame 12.
are detachably connected. The rotary device 13 includes a rotary machine frame 14, a rotary tiller 15 provided at the bottom thereof, and a rotary cover 6 that covers the rotary tiller 15.
0. The rotary cover 60 is the rotary machine frame 14
The main cover 61 is fixed to the rear end of the main cover 61, and the rear cover 63 is pivotally connected to the rear end of the main cover 61 by a support shaft 62 so as to be able to swing up and down, and serves as a tilling depth detection section of the rotary tilling section 15 at the bottom of the tank. . Further, the rotary tilling section 15 is connected to the PTO of the tractor 1.
It is driven by power transmitted from the shaft 6 via the universal joint shaft 16 to the input shaft of the gear case 17 on the rotary machine frame 14 side.

The rotary machine frame 14 has an upper connecting bin (upper connecting part) 24 provided at the upper end of the top mast 23 and a connecting bracket 2 fixed to a pair of left and right support arms 64.
8 (see FIG. 5). Then, the connecting bracket 2 of the pair of connecting brackets 28 is
8, as shown in FIGS. 2 and 3, there is a support shaft 6.
5. An operating link 67 is pivotally mounted via a boss portion 66 so as to be swingable back and forth. The operating link 67 has a hook-shaped engagement recess 68 and is connected to a protruding piece 70 of the rear cover 63 via a rod 69. Therefore, the operating link 67 can swing back and forth in conjunction with the swinging of the rear cover 63.

Reference numeral 71 in FIG. 9 is a lowering rod for the rear cover 63, which is inserted into a support bracket 72 that projects rearward from the support arm 64, and has springs 73 and 74 above and below it.
However, during depth control, the spring 74 is left in a free state and is used to limit the descent of the rear cover 63.

Next, the details of the connecting frame 12 will be explained with reference to FIGS. 1, 2, 4, and 5. A hook 18 is provided at the center of the upper part of the connecting frame 12, and a pair of left and right fitting receptacles 20, a lower link pin 21, and a locking member 22 are provided at both left and right ends of the lower part via support brackets 9, respectively. The hook 18 is configured in a hook shape to removably hook the upper connecting pin 24 at the upper end of the top mast 23 from below, and receives the upper connecting pin 24 from below in the hook recess 25. A vibration-proof rubber 26 is provided. Further, the top link 9 is connected to the front part of the hook 18 by a pin 27.

The support bracket 19 has an inverted U shape, and a fitting receptacle 20 is attached to the rear side of the support bracket 19. The fitting receiver 20 is configured to be open at the rear so that it can be removably fitted into the lower connecting bins 29 fixed to the pair of connecting brackets 28 from the front side, and the lower connecting bins 29 are attached to the upper side thereof.
A guide section 30 for guiding the guide 9 is provided.

The lock member 22 is for locking the lower connecting pin 29 in the fitting receiver 20 so that it cannot be removed, and its boss portion 31 is rotatably fitted into a collar 32 in the support bracket 19. 7 collar 32 is fitted onto bolt 33,
It is fixed to the support bracket 19 by this bolt 33. The locking member 22 has a pin locking part 34, a bin guide 35, and a stopper part 36 on the rear side, and the pin locking part 34 and pin guide part 35 are connected to the notch part 3 of the fitting receiver 20.
7 into and out of the fitting receiver 20. The stopper part 36 is for abutting against the lower side of the fitting socket 20 at a position where the pin guide part 35 projects into the fitting socket 20 to restrict rotation of the locking member 22 . A helical spring 38 is wound around the boss portion 31 of the locking member 22, and this spring 38 locks the pin locking portion 34 and the pin guide portion 35 so that they protrude into the fitting receiver 20. Member 22
In order to energize it, its lower end is hooked to the support bracket 9, and the other end is hooked to the locking member 22, respectively.

Each lock member 22 is connected to the operating lever 4 via an interlocking mechanism 39.
It is linked to 0. That is, the interlocking mechanism 39 includes interlocking shafts 42 provided in 1,000 rows on the connecting frame 12 and the open frame 4,
It is composed of a link 43 fixed to both ends of this interlocking shaft 42 and a rod 44 connecting this link 43 and the locking member 22, and an operating lever 40 is fixed to the interlocking shaft 42. The operating lever 40 is arranged at a position offset to one side in the left-right direction on the rear side of the connecting frame 12, and can be operated from the tractor 1 side when the low-knee device 13 is raised. The intermediate frame 41 has an inverted U-shape, and a pair of left and right fixing plates 46 having notches 45 are fixed inside the intermediate frame 41. An L-shaped support plate 47 is fixed to each of the fixed plates 46 with bolts 48, and the interlocking shaft 42 is rotatably supported by the fixed plates 46 and the support plate 47. The link 43 has a connecting portion 44a with the rod 44 located on the rear side of a line a connecting the interlocking shaft 42 and a connecting portion 44b between the rod 44 and the locking member 22, so that the operating lever 40 cannot be moved. When operating backwards, the lock member 2 will move slightly beyond line a.
2 in a released state. The rod 44 is formed in the inner plate of the support bracket 19 and inserted into a six-slot hole 49.

The lower link pin 21 is a lower connecting pin 2 in the fitting receiver 20.
Its base is fixed to the outer plate of the support bracket 19 and the fitting receptacle 20 so as to be coaxial with the lower link pin 21, and the ball 50 at the rear end of the lower link 10 is fitted onto the lower link pin 21. It is secured by a retaining pin 51.

As shown in FIGS. 1 and 2, a pair of left and right L-shaped support plates 75 are fixed between the intermediate frame 41 of the connection frame 12 and each support bracket 19. horizontal axis 7
A shaft coupling device 77 is provided via 6. The shaft coupling device 77 supports the rear end portion of the universal joint shaft 16 and is configured to be fitted into and removed from the input shaft 78 when the rotary device 13 is attached or removed.

A mounting plate 79 is fixed to the support plate 75 on the side corresponding to the operating link 67 among the pair of support plates 75.
A response link 80 is pivotally attached to the body via a boss portion 81 and a support shaft 82 so as to be freely swingable. As shown in FIG. 8, the responsive link 80 has a receiver on the mounting plate 79 that can come into contact with a surface 83 from above, and an engaging portion 80 that protrudes laterally at the lower end.
It has a. The engaging portion 80a engages with and disengages from the engaging recess 68 of the operating link 67 when the lower connecting pin 29 is fitted into and removed from the fitting receiver 20. Boss portion 8 of operating link 80
A link 83 is fixed to 1, and an inner wire 86 of a push-pull cable 85 is connected to this link 84. The outer wire 87 of the push-pull cable 85 is fixed to an outer receiving plate 88 fixed to the mounting plate 79. The push-pull cable 85 is led along the side of the lower link 10 toward the tractor l side, and connected to a potentiometer (electrical signal generator) so as to be linked to the response link 80.
89. Potentiometer 89 is axis 90
It has an arm 91 that swings around, and the arm 91 is biased in the return direction (arrow b) by an internal spring.

An inner wire 86 of a bushing cable 85 is connected to the arm 91, and an outer wire 87 is fixed to an outer receiving plate 88 fixed to the tractor 1. Note that the potentiometer 89 is a solenoid valve (
It is connected to a control circuit (not shown) to provide a feedback signal for depth control.

Next, the operation will be explained. When connecting the rotary device 13, the tractor 1 is moved backward with the connection frame 12 lowered. When the hook 18 reaches the lower side of the upper connecting pin 24, the retreat is stopped, the hydraulic device 3 is operated in the upward direction, and the connecting frame 12 is raised via the three-point link mechanism 7.

Then, the hook 18 hooks the upper connecting pin 24 from below. Then, when the connecting frame 12 is further raised, the rotary device 13 rotates clockwise around the upper connecting pin 24, and the lower connecting pin 29 moves forward slightly, so that the lower connecting pin 29 is connected to the fitting receiver. 20. At this time, since the bin guide part 35 of the locking member 22 protrudes into the fitting receiver 20, the lower connecting pin 29 pushes this bin guide part 35, and the locking member 22 moves downward around the axis of the bolt 33 ( C), and the lower connecting pin 29 enters the fitting receiver 20. When the lower connecting pin 29 is fitted into the fitting receiver 20, the locking member 22 is returned by the spring 38, and the pin locking portion 34 locks the lower connecting pin 29 so that it cannot be pulled out from the rear side. At this time, the operating lever 40 swings back and forth around the interlocking shaft 42 in conjunction with the locking member 22, but there is no problem with the side steps. As a result, the low clearance device 13
The connection is completed.

On the other hand, before connection, the response link 80 connects to the potentiometer 8.
Due to the spring in 9, the receiver of the mounting plate 79 comes into contact with the surface 80,
The engaging portion 80a is in a state of protruding rearward as shown in FIG. Therefore, when the lower connecting pin 29 fits into the fitting receiver 20, the engaging portion 80a comes into contact with the operating link 67, and the response link 80 rotates around the support shaft 82 in the direction indicated by the arrow d.
The engaging portion 80a is connected to the operating link 67 as shown in FIGS. 6 and 7.
It engages with the engagement recess 68 of. Therefore, the rotary device 13
At the same time as connecting the rear cover 63 and the potentiometer 8
9 can be connected in an interlocked state.

When the rear cover 63 moves up and down, the operating link 67 swings around the support shaft 65 via the rod 69, and the response link 80 is supported via the engagement portion 80a that engages with the engagement recess 68. Since it swings about the axis 82, the potentiometer 89 is activated via the push-pull cable 85.

In addition, at this time, the support shafts 65 and 82 are approximately coaxial,
Further, during control, the arm 91 swings between the first ranges 4.

When removing the rotary device 13, proceed as follows. First, raise the lower control device 13 to the raised position and bring it close to the tractor 1 side, and then press the operating lever 40 from the driver's seat 4 side.
to the rear (in the direction of arrow C) to the imaginary line position. Then, the locking member 22 is pushed through the interlocking shaft 42, and the locking member 22 rotates around the bolt 33 in the direction indicated by arrow C. Then, when the connecting portion 44b crosses the line segment a, the locking member 22 is held at the release position of the imaginary line, and the lower connecting bin 29 is unlocked. Next, the hydraulic device 3 is operated in the downward direction to lower the three-point linkage mechanism 7 and the connecting frame 12.

Then, if the rotary device 13 is grounded, the lower connecting bin 29
is removed from the fitting receiver 20 rearward. Then, when the hook is further lowered, the hook 18 comes off from the upper connecting pin 24 downward. At this time, the response link 80 swings in the opposite direction of the arrow d and is disengaged from the engagement recess 68 of the operating link 67. Therefore,
At the same time as the rotary device 13 is removed, the interlock between the operating link 67 and the response link 80 can be released.

Note that the engaging portion 80a is attached to the operating link 67, and the engaging portion 80a is attached to the responsive link 8.
0 may be provided with hook-shaped engagement recesses 68, respectively.

Alternatively, as shown in FIG. 10, the engaging recess 68 of the actuating link 67 may be eliminated, and the engaging part 80a of the response link 80 may come into contact with the actuating link 67 from the front side.

At this time, a spring 93 is provided between the response link 80 and the outer receiving plate 88 to bias the response link 80 in the abutting direction. This simplifies the structure and ensures that the two work together.

Further, in the embodiment, depth control of the rotary device 13 is illustrated, but the present invention is not limited to this.

That is, in the working machines connected using the connecting frame 12, if the working state of the working machine is detected and converted into an electric signal, and the signal is used for predetermined control, it is suitable for excavators, reapers, etc. It can be widely used.

(Effects of the Invention) According to the present invention, the operating link 67 that is interlocked with the detection section 63 of the working machine 13 is provided near the connection section 29, and the response link 80 that is interlocked with the electric signal generation section 89 on the tractor 1 side. Since it is provided on the side of the connecting frame 12 so that it can be freely attached to and detached from the operating link 67 when the connecting frame 12 and the connecting part 29 are attached and detached, the electric signal generating part 89 is located on the tractor 1 side. The detection system can be attached and detached at the same time as the machine is attached and detached, making handling easier and preventing failures due to forgetting to remove it.

Further, in the present invention, an engagement recess 80a is provided in one of the operating link 67 and the response link 80, and the engagement recess 80a
Since the engaging portion 68 is provided on the other side, the engaging portion 68 is releasably engaged with the actuating link 67 and the responsive link 80 can be reliably interlocked with each other.

Furthermore, in the present invention, the operating link 67 and the response link 80 are configured to abut upon connection, and the spring 93 that biases the response link 80 in the contact direction is provided, so that the operating link 67 and the response link 80 can be easily connected. The response link 80 can be linked.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway side view of the connecting frame side, FIG. 2 is a partially cutaway front view of the same, and FIG. 3 is a side sectional view of the main part of the low clearance device. Fig. 4 is a partially cutaway side view of the connected state, Fig. 5 is a sectional view of the same plane, Fig. 6 is a side sectional view of the interlocked state, Fig. 7 is a front sectional view of the same, and Fig. 8 is a sectional view of the mounting plate. A plan view, FIG. 9 is a side view of the whole, and FIG. 10 is a side sectional view of a modified example. 1... Tractor, 7... Three-point linkage mechanism, 12...
・Connection frame, 13...Rotary device (work machine), 18・
...Hanging tool, 20... Fitting receiver, 22... Locking member, 24... Upper connecting pin (connecting part), 29... Lower connecting pin (connecting part), 39... Interlocking Mechanism, 63... Rear cover (detection section), 67... Operating link, 68...
・Engagement recess, 80...Response link, 80a...Engagement part, 89...Potentiometer (ii Electric signal generation part. Fig. 6

Claims (3)

[Claims] (1) Connecting frame (12) at the tip of the three-point link mechanism (7)
In the tractor work equipment coupling device, the detection part ( The operating link (67) interlocked with the connecting part (2
A response link (80) provided near the connecting frame (1) and interlocked with the electric signal generator (89) on the tractor (1) side is connected to the connecting frame (1).
2) and the link (67) that operates when the connection part (29) is attached or detached.
1. A detection system interlocking device for a tractor working machine, characterized in that it is provided on a connecting frame (12) side so as to be detachable from the connecting frame. (2) An engaging recess (80a) is provided in one of the operating link (67) and the response link (80), and the engaging recess (80a) is provided in one of the operating link (67) and the response link (80).
2. The detection system interlocking device for a tractor working machine according to claim 1, wherein an engaging portion (68) is provided on the other end to removably engage with the first member. (3) When connected, the operating link (67) and the response link (80)
) The detection system for a tractor working machine according to claim 1, further comprising a spring (93) that biases the response link (80) in the direction of contact. Interlocking device.