JPH0546209U - Tractor working depth detector - Google Patents

Abstract

(57) [Abstract] [Object] The present invention transmits the working amount to the tilling depth detector without trouble even if the rear cover is adjusted up and down in the device for detecting the tilling depth by the swing angle of the rear cover of the rotary tiller. It is intended to provide what can be done. [Structure] A hitch frame 5 is connected to a rear portion of the tractor by a top link 3 and a lower link 4, and a rotary cultivator is detachably connected to the hitch frame 5, and a height of a rear cover 15 of the rotary cultivator can be adjusted. In which the amount of swinging about the pivotal position is transmitted to the tillage depth detector by a tillage depth wire, the tillage depth wire is linked to one side of the rear cover 15 from the main rotary cover 11 A work implement detection device for a tractor arranged along the upper surface of the tractor and on the other side beyond the center of the rotary main cover 11.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cultivating depth detecting device for a tractor, in which a rear cover of a rotary cultivator is pivotally supported so that its height can be adjusted, and a swing amount of the rear cover is transmitted to a cultivating depth detector by a wire.

[0002]

[Prior Art]

 Conventionally, a hitch frame is connected to a rear portion of a tractor by a top link and a lower link, and a rotary cultivator is detachably connected to the hitch frame, and a rear cover of the rotary cultivator is pivotally supported with height adjustable. A tractor working depth detecting device is already known in which the amount of swinging about the pivot position is transmitted to the working depth detector by a working depth wire.

[0003]

[Problems to be solved by the device]

 When the height of the rear cover is adjusted in the known tractor working depth detection device, the rear end of the working depth wire is installed at a certain position as the rear cover moves up and down and back and forth. Since it moves back and forth with respect to the vessel, it was placed on one side of the main rotary cover with the deep-deep wire loosened. However, on the same side, the distance from the hitch frame is narrow and the looseness of the working depth wire changes greatly in this state, so the wire breaks or deforms irregularly and other members, such as the rear part of the lower link. There were problems such as being caught on the pins of the machine and being torn off when the work machine was attached and detached.

[0004]

[Means for Solving the Problems]

 According to the present invention, a hitch frame is connected to a rear portion of a tractor by a top link and a lower link, a rotary cultivator is detachably connected to the hitch frame, and a rear cover of the rotary cultivator is pivotally supported so that its height can be adjusted. In addition, when the amount of swinging about its pivot position is transmitted to the working depth detector by the working depth wire, the working depth wire is linked to one side of the rear cover from the link linked to the upper surface of the main rotary cover. At the same time, by arranging the rotary cover over the other side beyond the center of the rotary main cover, when the height of the rear cover is adjusted, the working depth wire is deformed along the upper surface of the main rotary cover. And the above-mentioned subject was solved.

[0005]

[Action]

 When the height of the rear cover is adjusted to make a large change in the working depth, the working depth wire deforms smoothly along the main rotary cover of the rotary cultivator, causing it to break or catch on other members. It will not be torn off when the machine is attached or detached. Also, when cultivating work with the rear cover at the desired height, when the working depth changes, the rear cover oscillates around the pivot, which is attached to the hitch frame or tractor body by the working depth wire. It is transmitted to the depth detector, and the rotary tiller is adjusted up and down according to the detection result.

[0006]

【Example】

 The present invention will be described in more detail with reference to the embodiments shown in the drawings. 1 is a mission case of a tractor, and a top link bracket 2 attached to a lower portion and an upper portion thereof has a top link 3 and lower links 4, 4. The lift arm 6 is connected to the lower link 4 via a lift rod, and the PTO shaft 7 has a rear portion supported by the hitch frame 5 and a yoke joint 8 supported on the work machine via a clutch. It is interlockingly connected to the input shaft of the rotary cultivator 10.

The rotary cultivator 10 has a rotary main cover 11 covering the upper surface of the rotary locus of the cultivating claw attached to the cultivating shaft, and a rear end fixed to the lateral frame 12 to form an arc shape in a side view. The rotating rails 13 and 13 are fitted to guide rollers on the rotary main cover 11 so as to be rotatable back and forth. The upper portion of the rear cover 15 is pivotally attached to the rear surface of the horizontal frame 12 so as to be vertically rotatable, and the upper end thereof is provided. The lower part of the lifting cylinder 17 with the electric motor 16 pivotally supported on the top mast 14 is connected to the middle part of the horizontal frame 12, and when the electric motor 16 is rotated in the forward and reverse directions, the lifting cylinder 17 expands and contracts. The rotating rails 13, 13 and the horizontal frame 12 integrally rotate back and forth, whereby the rear cover 15 moves up and down in an oblique direction.

A bracket 18 erected on the rear surface of the rear cover 15 is attached to a rear end of a bending link 20 pivotally supported by a receiving member 19 erected on the rear upper surface of the rotating rail 13 on one side. A plate 24a is projectingly provided on the front surface of a pipe frame 24 which is rotatably connected by a rod 21 and extends laterally from the side surface of a rotary gear case 22 having the input shaft, and a bracket screwed to the plate 24a. An intermediate portion of the plowing depth drive arm 25 is rotatably supported by a shaft 23, the lower end of the plowing depth drive arm 25 is the lower end of the bending link 20, and the rear of the rotary gear case 22 is S-shaped in a plan view. It forms a detour and is connected along the upper surface of the rotary main cover 11 with a rear deepening wire 27 made of a push-full wire, and the wire 27 is extended to the pivot portion. Since the torsion spring 28 for urging and rotating in the direction is additionally provided, when the rear cover 15 is vertically rotated due to the change of the working depth, the working depth drive arm 25 is correctly rotated in the forward and backward directions. When detecting the working depth, and when detecting the working depth while the rear cover 15 is rotated back and forth by the lifting cylinder 17 to adjust the lifting depth, the rear working depth wire 27 is provided from the rear one side of the rotary main cover 11. Since it expands and contracts along the upper surface of the rotary main cover 11 in an S-shaped free state that bypasses the rotary gear case 22 and extends to the other side, it does not get tangled with other equipment or is torn off when attaching or detaching the rotary cultivator 10. It won't get drunk.

The lower end connecting member of the hitch frame 5 supports the rear portion of the yoke joint 8 by a box-shaped bracket 30 fixed to the center thereof, and is attached to one side of the bracket 30. At the rear of the plate 34, an upper part of the plate 34 is bent outward, and a submersible depth driven arm 32 engaged with an upper part of the submersion driving arm 25 is rotatably supported. The digging depth wire 33 connecting the above is diagonally crossed over the yoke joint 8 and the front end is attached to the other side of the mission case 1 and is connected to the digging depth detector 35 which is a potentiometer.

Next, a device for detecting the amount of vertical movement of the rear cover 15, that is, the support height is described. A pipe 36 is provided on the horizontal frame 12 so as to stand upright and extends from the rotary gear case 22 to the other side. A lower end of an up-and-down drive arm 39 having an inverted L-shape is pivotally attached to a plate 37 integrated with the front surface of the frame 24 by a fulcrum pin 40, and an upper end thereof is interlockingly connected to the receiver 36 via a rod 38. is there. In addition, at the rear portion of the mounting plate 42 fixed to the other side of the bracket 30, the upper end is bent outwardly, and the middle portion of the lifting / lowering driven arm 43 with which the lifting / lowering driving arm 39 is engaged is supported by a spindle. The height detector 41, which comprises a potentiometer attached to the opposite side of the mission case 1 and is pivotally supported, and the lower part of the elevating and lowering drive arm 39 is connected to the deep working wire 33 and the X-shape on the yoke joint 8. The lifting wire 45 and the working depth wire 33 are the same and can be shared. Therefore, when the electric motor 16 rotates in the forward and reverse directions and the lift cylinder 17 expands and contracts, the rotary rails 13 and 13 rotate back and forth, the rear cover 15 moves up and down, and at the same time, the rod 38 moves back and forth. Therefore, when the raising / lowering drive arm 39 rotates the raising / lowering driven arm 43, and when the raising / lowering driven arm 43 rotates following it, the raising / lowering wire 45 detects and operates the height detector 41.

Further, a socket 50 of a harness 53 for transmitting power to the electric motor 16 is attached to a plate 51 fixed to a side surface of the rotary gear case 22, and is screwed to a side surface of the bracket 30 so as to project upward. Another socket 52 fixed to the plate 51 is made to correspond to the socket 50, and the socket 52 is connected to the battery mounted on the tractor body by the harness 54, and the socket 52 is made of rubber on the joint end side. It is equipped with a ring 54 for waterproofing and mudproofing and has two-pole (+-) connecting terminals 55, 55, and is inserted into the front part of the box-shaped body of the socket 50 so as to be able to move forward and backward. The two-pole pins 56, 56 are urged by springs 57, 57, and a rubber plate 58 is attached to the front surface to prevent rainwater and dust from entering.

When the rotary cultivator 10 is mounted on the hitch frame 5, the top hook 60 of the hitch frame 5 is hung on the pin at the upper end of the top mast 14 to raise the rotary cultivator 10. The lower hook 61 on both sides of the lower portion of the hitch frame 5 is fitted to the lower pin by pivoting forward around the pin, and the lock hook 62 pivots downward from above to enter the locked state. Conversely, when removing the rotary cultivator 10, the lock lever 62a is operated to disengage the lock hook 62 from the connecting pin, and when the lock cultivator 10 is lowered from the raised state to the ground, the connecting pin comes out from the lower hook 61. When the working machine is attached / detached, the working depth driving arm 25 is engaged / disengaged with the working depth driven arm 32, the lifting / lowering driving arm 39 is lifted / lowered with the lifting / lowering driven arm 43, and the socket 50 is / are with the socket 52. Since it is largely separated from the connecting portion of 61, mud and the like do not adhere and it does not hinder the connecting operation. When the rotary cultivator 10 is moved up and down each time the work machine is attached or detached, or when the machine is traveling, the looseness of the tilling depth wire 33 and the lifting wire 45 changes, but the wires 33, 45 intersect each other. Since it is placed on the yoke joint 8 in a state, it is not caught or pinched by other devices, and it is possible to always maintain a freely operating state. Also, brackets, wires, and other components can be formed in the same shape for a plurality of systems and shared.

In the above-described embodiment, the detection mechanism is composed of a potentiometer so that it can be applied to microcomputer control. However, when mechanically controlling the valve of the lift hydraulic cylinder, FIG. As shown in the figure, a relay swing arm 65 is pivotally supported via a bracket 63 at or near the site where the detection mechanism is mounted, and the front end of the working depth wire 33 (the lifting wire 45 on the other side) is attached to the lower end of the relay swing arm 65. It is connected and the upper end is interlockingly connected to the valve arm by the rod 64. By setting the arm ratio of the relay swing arm 65, microcomputer control is performed with a substantially constant pulling amount of the working depth wire 33 (or 45). It can be applied to both the system and the mechanical control system, and other devices can be the same.

[0014]

EFFECTS OF THE INVENTION In the present invention, a hitch frame 5 is connected to a rear portion of a tractor by a top link 3 and a lower link 4, a rotary cultivator is detachably connected to the hitch frame 5, and a rear cover of the rotary cultivator is provided. In the one in which 15 is pivotally supported so that its height can be adjusted and the amount of swinging about the pivotal position is transmitted to the working depth detector 35 by the working depth wire, the working depth wire is interlocked with one side of the rear cover 15. Since the link is arranged along the upper surface of the rotary main cover 11 and on the other side beyond the center of the rotary main cover 11, when the height of the rear cover 15 is adjusted, the working depth wire is Although the distance between the ends varies greatly, it is possible to make the plowing wire meander in a long space from one side of the rear end of the rotary main cover 11 to the front of the other side. In addition, it is possible to support the upper surface of the rotary main cover 11 in a stable state and in a state in which it can move freely, and the swing of the rear cover 15 can be used as a working depth detector. It is possible to prevent the malfunction of the rotary tiller 10 from being caught or pinched by other equipment while being accurately transmitted, and to prevent the rotary tiller 10 from being torn up and down.

[Brief description of drawings]

FIG. 1 is a side view of a tractor having a rotary cultivator connected to a rear portion thereof.

FIG. 2 is a plan view with the front portion omitted.

FIG. 3 is a plan view of the work machine connected to the hitch frame.

FIG. 4 is a plan view showing a state where the same is removed.

FIG. 5 is a side view of a lifting transmission system.

FIG. 6 is a side view of a working depth transmission system.

FIG. 7 is a front view of a connecting portion.

FIG. 8 is a sectional view of front and rear sockets.

FIG. 9 is a side view of the mechanical transmission means.

[Explanation of symbols]

 5 Hitch Frame 10 Rotary Tiller 11 Rotary Main Cover 12 Horizontal Frame 15 Rear Cover 17 Elevating Cylinder 25 Tillage Deep Drive Arm 27 Rear Tillage Deep Wire 28 Torsion Spring 32 Tillage Deep Driven Arm 33 Tillage Deep Wire 35 Tillage Depth Detector 39 Elevation Drive Arm 41 Height Detector 43 Elevator Driven Arm

Claims (1)

[Scope of utility model registration request] 1. A hitch frame 5 is connected to a rear portion of a tractor by a top link 3 and a lower link 4, a rotary cultivator 10 is detachably connected to the hitch frame 5, and a rear cover 15 of the rotary cultivator 10 is The height of the pivot is adjustable and the amount of rocking about the pivot position is used as the working depth detector 3
5 is transmitted to the other side beyond the center of the rotary main cover 11 while extending along the upper surface of the rotary main cover 11 from a link that links the deep-depth wire to one side of the rear cover 15. A tractor tilling depth detecting device, which is arranged over a wide area.