JP2003180107A - Automatic controller of differential gear of tiller and tiller equipped with the same and method for controlling traveling of tiller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic controller sensing a tilling state and automatically locking a differential gear when a tiller is kept in the tilling state and sensing the untilling state and automatically keeping a lock release state when a tiller is kept in the untilling state. <P>SOLUTION: The tiller K1 is equipped with a rotary tilling apparatus 2. The tilling apparatus 2 is equipped with a rotary device 21 for tilling the soil, a rotary cover 22 for covering the rotary device 21, an operating body 23 for operating an automatic controller 3 by rotating the controller 3 around an attaching shaft 230. The operating body 23 stops in contact with the surface of soil when the rotary device 21 is changed in a state capable of carrying out tilling by lowering the rotary device 21 and the operating body 23 operates the automatic controller 3 and locks the differential gear by further lowering the rotary device 21. When the rotary device 21 is raised and the operating body 23 is raised higher than soil, the operating body 23 is returned to a state before tilling and lock state of the differential gear is released. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic control device for a differential gear of a cultivator, a cultivator equipped with the same, and a traveling control method for the cultivator. More specifically, the present invention relates to a device for detecting when the cultivator is in the cultivated state and automatically locking the differential gear, and for detecting it when the cultivator is not in the cultivated state and automatically releasing the lock.

[0002]

2. Description of the Related Art Generally, a cultivator is equipped with a differential gear so that right and left wheels (driving wheels) rotate at the same rotation speed when traveling straight, and a difference in rotation speed between an inner wheel and an outer wheel when turning. This differential gear can be arbitrarily locked (fixed) or unlocked by manually operating the operating device. The cultivator then locks the differential gear,
Cultivated in a stable state by improving straightness, and unlocked to enable smooth turning.

[0003]

However, since the operation device of the differential gear is manually operated by the operator, there is a case where the operator forgets to lock it when plowing or forgets to release the lock when turning. there were. In the former case, one wheel slips on the mud or on a slope and does not move, and in the latter case, it may go straight when it has to turn, which is dangerous.

(Objective) An object of the present invention is to automatically lock a differential gear in a cultivating state and to unlock a differential gear in a turning state in a cultivator. Also,
Another object of the present invention is to make it possible to automatically lock the differential gear in the tilling state and to unlock the differential gear in the turning state etc. in the cultivator, and also to manually perform the locking and unlocking. Especially.

[0005]

[Means for Solving the Problems] The means of the present invention taken to achieve the above object are as follows. According to a first aspect of the present invention, there is provided a device for automatically controlling locking and unlocking of a differential gear of a tiller, a means for detecting when the tiller is in a tilling state, and / or when the tiller is not in a tilling state, and a tiller. An automatic control device for a differential gear of a cultivator, comprising: a means for locking the differential gear when in the state, and a means for releasing the lock of the differential gear when not in the cultivating state, .

According to a second aspect of the present invention, there is provided a device for automatically controlling locking and unlocking of a differential gear of a cultivator, which senses when the cultivator is in the cultivating state and / or when not in the cultivating state. Means and locks the differential gear when in the cultivated state, and a control device for releasing the lock of the differential gear when not in the cultivated state, the control device, the lock of the differential gear and Switching means for switching the unlocked state, and one end side provided on the sensing means side and the other end side provided on the switching means side, and an action transmission means for transmitting the movement of the sensing means to the switching means. It is an automatic control device for a differential gear of a cultivator.

According to the third aspect of the present invention, the manual operation device for manually locking and unlocking the differential gear is provided, and when the differential gear is locked or unlocked by the manual operation device, the sensing means is The automatic control device for a differential gear of a cultivator according to the first or second invention, characterized in that the movement of the sensing means is not transmitted to the switching means even when the cultivated state is sensed.

According to a fourth aspect of the invention, the sensing means senses the state of tillage when it comes into contact with soil, and the tiller according to the first, second or third aspect of the invention. This is an automatic control device for differential gears.

In the fifth invention, the cultivator is adapted to be cultivated in a state where the cultivating blade is tilted by lowering it from the position when it is not in the cultivating state, and the sensing means uses the cultivating blade as the cultivating blade. An automatic control device for a differential gear of a tiller according to the first, second or third aspect of the invention, characterized in that the tiller state is sensed when the tiller is tilted downward.

According to the sixth aspect of the invention, the tiller is adapted to cultivate the cultivating blade in a state in which the cultivating blade is lowered from the position when the cultivating blade is not in the cultivating state, and the sensing means lowers the cultivating blade and soil. An automatic control device for a differential gear of a cultivator according to any one of the first, second and third inventions, characterized in that the cultivated state is sensed when the handle further descends from the state of contact with.

In the seventh aspect of the invention, the cultivator is such that the handle is movable laterally with respect to the traveling direction, and the cultivator is cultivated while being stopped at a predetermined position. Is an automatic control device for a differential gear of a cultivator according to the first, second or third aspect of the present invention, which senses a cultivated state when the handle stops at the predetermined position. .

An eighth invention is characterized in that it is provided with an automatic control device for a differential gear according to the first, second, third, fourth, fifth, sixth or seventh invention. , A cultivator.

According to a ninth aspect of the present invention, a traveling device having wheels, a prime mover and a handle, a tilling device, and the first, second, third, fourth, fifth, sixth or seventh invention. Has a control device for automatically controlling the differential gear, and an operation part for operating the control device is provided in the vicinity of the grip part of the handle, and the operation part and the control device transmit power. A cultivator, characterized in that it is connected via means.

According to the tenth aspect of the invention, when the cultivator is in the cultivating state, it is detected to automatically lock the differential gear, and when it is not in the cultivating state, it is detected to be automatically unlocked. It is a traveling control method of a tiller including the above.

According to an eleventh aspect of the present invention, there is provided a traveling control method for a tiller, which comprises automatically locking a differential gear when the sensing means comes into contact with soil.

(Operation) When the cultivator is in the cultivated state, the differential gear is automatically locked by detecting this by the sensing means. As a result, it is possible to cultivate in a stable state by improving straightness. When not in the cultivated state, the lock is automatically released to allow smooth turning.

When the cultivator is in the cultivated state, the sensing means senses this and moves, and the action transmitting means transmits the movement of the sensing means to the switching means. The switching means, to which the movement of the sensing means is transmitted, switches the differential gear to the locked state to lock the differential gear. When the cultivator is not in the cultivated state, the movement of the sensing means is not transmitted from the action transmission means to the switching means, so the switching means switches the differential gear to the unlocked state and unlocks the differential gear.

In the case where the manual operating device for locking or unlocking the differential gear is used, when the differential gear is locked or unlocked by this manual operating device, the sensing means is provided even when the sensing means senses the cultivated state. Is not transmitted to the switching means. In this way, the differential gear can be automatically switched between locked and unlocked or manually locked and unlocked. Thus, for example, in the loading operation of the vehicle onto the bed, even when the sensing means does not sense the cultivated state, the differential gear can be locked to enhance the straightness and the loading can be stabilized.

When the sensing means senses the cultivated state when it comes into contact with soil, the differential gear is automatically locked when it comes into contact with soil, and the differential gear is automatically locked when it no longer comes into contact with soil. It will be canceled.

When the cultivator is tilted in the direction of lowering the cultivating blade, the sensing means detects the cultivating state. When the cultivator is tilted in the direction of lowering the cultivating blade, the differential gear automatically locks. The differential gear is automatically unlocked when the cultivator returns from the tilted state.

When the handle further descends from the state where the plowing blade is lowered to contact with the soil, the sensing means senses the plowing state. When the handle descends, the differential gear is automatically locked, The differential gear is unlocked automatically when is raised.

When the handle stops at a predetermined position,
What the sensing means senses the cultivated state is that the differential gear is automatically locked when the handle is stopped at the above-mentioned predetermined position, and the differential gear is locked when the handle moves laterally with respect to the traveling direction. It will be canceled automatically.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in more detail with reference to the drawings. FIG. 1 shows an embodiment of a cultivator equipped with an automatic control apparatus for a differential gear according to the present invention, in which an operating lever is in an automatic position,
FIG. 2 is a side view explanatory diagram showing a state where the differential gear is not locked without being cultivated, and FIG. 2 is an enlarged explanatory diagram showing the automatic control device in the state of FIG. 1. In the following description, the term "front" indicates the left side in the figure, and the term "rear" indicates the right side in the figure.

Reference numeral K1 indicates a walking type cultivator.
The tiller K1 includes a traveling device 1 and a rotary-type tiller 2. The traveling device 1 is a motor that transmits power to wheels 11, 11 (one of the wheels is not shown) provided on both sides of the axle 10 and in front of the frame and transmits power to the wheels 11, 11 and the cultivating device 2. 12 and a handle 13 extending obliquely rearward from the frame.

An operating lever 130, which is a manual operating device for operating an automatic control device 3 for a differential gear, which will be described later, is provided near the grip of the handle 13. The other end of the wire Y1 whose one end is connected to the automatic control device 3 is connected to the base of the operation lever 130.
The operation lever 130 is rotatable in the front-rear direction and is located at any of three positions: a forward tilted position (FIG. 1), a backward tilted position (FIG. 1), and a position therebetween (FIG. 1). It has a structure that can be fixed at that position. Operating lever 13
The movement of each automatic control device 3 when 0 is moved to the above-mentioned position will be described in the section of action.

The tiller 2 includes a chain case 20 in which a chain for transmitting the power of the prime mover 12 is housed, a rotary device 21 for rotating and tilling the soil, a rotary cover 22 for covering the rotary device 21 and a mounting shaft. An operating body 23, which is a sensing means for operating the automatic control device 3 by rotating in the vertical direction around 230, is provided. The operation body 23 is provided on the rear portion of the rotary cover 22 and has a structure which also serves as a cover.
However, the operating body 23 does not necessarily have to also function as a cover. The automatic control device 3 is provided above the rotary cover 22 and the operating body 23.

A mounting bracket 24 for mounting the tail wheel 4 and the resistance member (see FIGS. 9 and 10) is attached to the rotary cover 22 so as to extend rearward. A tail wheel 4 is attached to the cultivator K1 shown in FIG. A rubber mudguard flap 25 having a required flexibility is provided at the lower edge of the operating body 23 so as to hang downward. The cultivator 2 is
It is connected to the traveling device 1 by a chain case 20.

In the present embodiment, the cultivator K1 is shown in which the cultivating device 2 is fixedly provided on the traveling device 1 so as not to be detachable, but the cultivating device is not limited to this. It is also possible to use an attachment type cultivating device 2 which is detachable from the traveling device 1.

The structure of the automatic control device 3 for the differential gear will be described in detail with reference to FIG. FIG. 2 shows a state in which the operation lever 130 is in the automatic position (in FIG. 1), the plowing is not performed, and the automatic control device 3 is not locked. The automatic control device 3 includes an attachment member 30 fixed on the rotary cover 22, a base member 31 hung vertically on the attachment member 30, and a switching unit 3 provided on a side portion of the base member 31.
2. A rod-shaped action transmission member 39 and the like, one end side of which is provided on the operating body 23 side and the other end side of which is connected to the switching portion 32, are provided.

The attachment member 30 is a rectangular plate having a required length, the length direction of which is oriented in the front-rear direction, and the wide surface of the bolt B is covered on the surface of the rotary cover 22.
Fixed by. The attachment member 30 is bent downward from a required position so as to follow the surface shape (arc shape) of the rotary cover 22.

The base member 31 is a rectangular plate having a required length, the length direction of which is oriented in the front-rear direction, and the attachment member 3
It stands vertically on 0 and is fixed by welding. Base member 3
1 is formed so as to follow the curved surface shape of the attachment member 30.

The switching portion 32 is provided with a driving member 33 which is a substantially rectangular plate body, and a driven member 35 which is a substantially isosceles triangular plate body whose bottom portion is longer than each oblique side portion.

A shaft 310 is projectingly provided on the side surface of the base member 31 on the rear end side. A drive member 33 is provided on the shaft 310 so as to be rotatable in the front-rear direction about the lower side. On the upper side of the driving member 33, a force receiving member 330 through which the action transmitting member 39 penetrates is provided so as to project from the surface. The force receiving member 330 is
When the action transmission member 39 slides in the penetrating state, it can rotate in the circumferential direction so that the connection angle with the action transmission member 39 can be changed. On the front side of the central portion of the driving member 33, an engaging member 331 is provided so as to project from the surface.
The surface of the engaging member 331 is rotatable in the circumferential direction.
However, it does not have to rotate.

A shaft 311 is projectingly provided on the side surface of the base member 31 slightly above the front side of the shaft 310. A driven member 35 is provided on the shaft 311 so that the top side thereof is located on the front side and can be rotated in the front-rear direction about a slightly lower side than the center. From the top side to the bottom side of the driven member 35,
A guide hole 350 penetrating in the shape of an elongated hole is provided. The guide hole 350 is formed in an arc shape centered on the shaft 311. Further, on the lower side of the driven member 35, the mounting shaft 3 is laterally provided.
51 is projected. Furthermore, on the upper side of the driven member 35,
A fitting recess 352 into which the engaging member 331 can be fitted is formed by cutting out a part of the edge of the bottom portion. Driven member 35
2 is provided on the front side so as to cover the driving member 33 in FIG. 2, and when the driving member 33 rotates forward, the peripheral surface portion of the engaging member 331 contacts the bottom edge portion of the driven member 35, The engaging member 331 pushes up.

Although not shown, a torsion coil spring is attached to the shaft 311 so that the upper side of the driven member 35 is biased to rotate in the backward direction.

Guide portions 36 and 37 for guiding the wires Y1 and Y2, which are power transmission means, are provided on the upper and lower portions of the front side of the base member 31. Upper guide 36
Has a wire Y whose other end is connected to the operation lever 130.
1 through which one end of this wire Y1 is driven member 3
5 is attached to the guide hole 350. A wire Y2, the other end of which is connected to the differential gear side, passes through the lower guide portion 37, and one end of the wire Y2 is attached to the attachment shaft 351 of the driven member 35.

The driven member 35 shown in FIG. 2 is a wire Y1.
Since the mounting portion of is positioned at the front end portion of the guide hole 350, the mounting portion is stopped in the state in which the biasing force of the torsion coil spring that tries to rotate in the backward direction acts.

A mounting member 38 is fixed to the operating body 23 by welding. The lower end of the action transmission member 39 is rotatably attached to the attachment fitting 38. Action transmission member 39
The upper side of the force receiving member 330 penetrates.

The action transmitting member 3 penetrating the force receiving member 330
A detachment prevention member 390 formed by screwing a nut is provided on the threaded portion at the tip of 9. A compression coil spring S having a required length, which is an elastic body, is provided in a portion of the action transmission member 39 that does not penetrate the force receiving member 330 so as to be inserted therein. A stopper member 391 is fixedly provided on the base side of the action transmission member 39. Compression coil spring S
Is provided such that both ends are in pressure contact with the stopper member 391 and the force receiving member 330, and a biasing force is applied in a direction of expanding the interval between the stopper member 391 and the force receiving member 330.

The drive member 33 shown in FIG. 2 is pushed up by the compression coil spring S, but is pushed down by the detachment prevention member 390 due to the weight of the operating body 23 and the like.
It is stopped at the position that is most rearwardly rotated. In this state, the engagement member 331 is not in contact with the driven member 35.

The automatic control device 3 includes a rotary cover 22.
The covering member 5 provided on the upper surface covers substantially the entire surface so that soil or the like is not easily covered.

(Operation) FIG. 3 is a side view explanatory view showing a state in which the differential gear is locked by cultivating the cultivator with the operation lever in the automatic position, and FIG. 4 is the automatic control in the state of FIG. It is an enlarged explanatory view showing an apparatus. Figure 1
With reference to FIGS. 4 to 4, the operation when the cultivator with the operation lever 130 in the automatic position (FIGS. 1 and 3) is used will be described.

First, the case where the differential gear is automatically locked when plowing is described. Figure 1
The handle 13 is lowered from the state shown in, and the rotary device 2
Lower the position 1 so that it can be cultivated. When the height of the rotary device 21 is lowered, the mudguard flaps 25 come into contact with the soil and bend, and the operating body 23 stops in contact with the surface of the soil. When the rotary device 21 is further lowered from this state, the gap between the force receiving member 330 and the mounting member 38 becomes narrower. In this way, the compression coil spring S provided between the force receiving member 330 and the stopper member 391 contracts.

Although the compression coil spring S contracts, the compression coil spring S itself has an urging force for widening the gap between the stopper member 391 and the force receiving member 330, so that the driving member 33 is rotated forward by this urging force. The coupling member 331 is the driven member 35.
Contact the bottom edge of the. Then, when the drive member 33 further rotates forward, the engaging member 331 rotates along the edge of the bottom portion and pushes up the driven member 35 to rotate the upper side forward. At this time, since the wire Y1 is not operated by the operation lever 130, the mounting portion of the wire Y1 is guided by the rotation of the driven member 35 to the guide hole 3
Located at the rear end within 50.

When the upper side of the driven member 35 rotates forward, the mounting shaft 351 moves rearward and pulls the wire Y2 mounted on the mounting shaft 351 rearward. In this way, the differential gear is locked. The locked state of the differential gear is maintained as long as the operating body 23 is in contact with the surface of the soil and is stopped, and the rotary device 21 is lowered to the position where it can be cultivated.

Next, the case where the lock of the differential gear is automatically released will be described. The handle 13 is raised from the state shown in FIG. 3 to raise the position of the rotary device 21 above the soil. When the height of the rotary device 21 is raised, the operating body 23 that has stopped in contact with the surface of the soil returns to its original position due to its own weight and the restoring force of the compression coil spring S. Accordingly, the stopper member 391 and the force receiving member 33
The distance from 0 is widened, and the drive member 33 pushing up the driven member 35 is also rotated rearward by the removal prevention member 390,
The upper side of the driven member 35 also rotates backward.

When the upper side of the driven member 35 rotates backward and the mounting shaft 351 moves forward, the wire Y2 moves forward. As a result, the differential gear is released from the locked state. This unlocked state is maintained as long as the position of the rotary device 21 is raised above the soil and the operating body 23 is in the original position before tilling.

As described above, in the cultivator K1, the differential gear is automatically locked in the cultivating state, so that the cultivating work can be performed in a state where the straightness is enhanced and stabilized. Further, when not in the cultivated state, the lock of the differential gear is automatically released, so that the turning can be smoothly performed. As a result, if you forget to lock manually when plowing, for example, one wheel will not slip due to slipping on a mud or a slope, you will forget to unlock and you will go straight when turning. No need to cultivate.

In the cultivator K1 shown in the present embodiment, the differential gear can be manually locked or unlocked by changing the position of the operation lever 130. FIG. 5 is an enlarged explanatory view showing a state where the differential gear is manually locked by operating the operation lever, and FIG. 6 is an enlarged explanatory diagram showing a state where the differential gear is manually unlocked by operating the operation lever. . With reference to FIGS. 1 to 6, when the operating lever is manually locked from the automatic position (FIGS. 1 and 3) (the operating lever is FIGS. 1 and 3), the lock is manually released. The operation in the case (the operation lever is shown in FIGS. 1 and 3) will be described.

Incidentally, in order to show that the operating body 23 does not affect the differential gear when the differential gear is manually locked, in FIG. 5, the operating body 23 is in a position when not cultivated. Shows. Further, in order to show that the operating body 23 does not affect the differential gear even when the differential gear is manually unlocked, FIG. 6 shows the operating body 23 in the position at the time of plowing. .

First, the case where the differential gear is manually locked will be described. The operating lever 130 is tilted forward (the operating lever is shown in FIGS. 1 and 3). When the operation lever 130 is tilted forward, the wire Y1 connected to the base side of the operation lever 130 is pulled toward the grip portion side (rear side) of the handle 13. As a result, the upper side of the driven member 35 stopped at the auto position rotates forward about the shaft 311.

When the upper side of the driven member 35 rotates forward, the mounting shaft 351 moves backward. When the mounting shaft 351 moves rearward, the wire Y2 mounted on the mounting shaft 351 is pulled rearward. In this way, the differential gear is locked. The locked state is maintained unless the position of the operation lever 130 changes.

Next, a case where the differential gear is not manually locked will be described. Operating lever 130
To the rear (the operation lever is shown in FIGS. 1 and 3). When the operation lever 130 is tilted backward, the tension of the wire Y1 is relaxed. The driven member 35 has a torsion coil spring,
Since the urging force that the upper side rotates backward is applied,
When the wire Y1 is loosened, the driven member 35 stopped at the auto position is rotated backward at the upper side about the shaft 311.

When the upper side of the driven member 35 rotates backward, the mounting shaft 351 moves forward. When the mounting shaft 351 moves forward and the wire Y2 moves forward, the differential gear is unlocked. The driven member 35 rotated rearward is engaged with the engaging recess 352 by the engaging member 331.
Is engaged and stopped, and the unlocked state is maintained.
When the differential gear is manually unlocked, the rotary device 21 and the operating body 23
Even if the positional relationship between the force receiving member 330 and the mounting bracket 38 is narrowed, the driving member 33 does not move because the engaging member 331 fits into the fitting recess 352, so that the compression coil spring S is a stopper. It only contracts between the member 391 and the force receiving member 330 (see FIG. 6).

In the cultivator K1 shown in this embodiment, the operating body 23 is used as a sensing means. However, the sensing means is not limited to this. For example, the following may be used as the sensing means. In addition, in FIG. 7 to FIG. 18 described below, FIG.
The same reference numerals are given to the same or equivalent parts as those shown in. Further, in the following description, description of the structure overlapping with the above-mentioned portions will be omitted.

FIG. 7 is a side view explanatory view showing a state in which the hanging member is used as the sensing means and the differential gear is not locked without tilling. FIG. 8 is a side view explanatory view showing a state in which the differential gear is locked by cultivating the cultivator shown in FIG. 7.

Reference numeral K2 indicates a cultivator having a hanging member 6 as a sensing means. The hanging member 6 is a known mechanical means (for example, a link mechanism, a cam mechanism, a friction transmission mechanism, a gear transmission mechanism, a winding transmission mechanism, etc.) or an electrically known means (switch, motor, solenoid, etc.), or those. Is provided so that the movement is transmitted to the differential gear. This hanging member 6
It is provided in the vicinity of the connecting portion where the chain case and the traveling device 1 are connected. In the hanging member 6, the weight 60 is the hanging metal fitting 61.
It is suspended so that it can be swung from the required location. The hanging metal fitting 61 is always hung in the gravity direction regardless of the inclination of the cultivator K2.

The cultivator K2 is provided with a hanging fitting 61 for the hanging member 6.
Is hung as shown in FIG. 7, so that the differential gear is not locked when not in the cultivated state. When the handle 13 is lowered from the state shown in FIG. 7 to lower the position of the rotary device 21, the hanging member 6 senses that the tilt of the cultivator has changed, whereby the differential gear is locked (see FIG. 8). .

When the handle 13 is raised from the state shown in FIG. 8 to raise the position of the rotary device 21 above the soil, the hanging member 6 senses that the tilt of the tiller has changed again,
As a result, the locked state of the differential gear is released.

FIG. 9 is a side view explanatory view showing a state in which the resistance member is used as the sensing means and the differential gear is not locked without tilling. FIG. 10 is a side view explanatory diagram showing a state in which the differential gear is locked by cultivating the cultivator shown in FIG. 9.

Reference numeral K3 indicates a cultivator having a resistance member 7 as a sensing means. The resistance member 7 uses a known mechanical or electrical means similar to the case of the cultivator K2,
It is provided so that the movement is transmitted to the differential gear. The resistance member 7 is attached to a mounting bracket 24a extending rearward from the rotary cover 22. The lower side of the resistance member 7 has a mounting bracket 24a.
It can be rotated in the front-rear direction about a portion attached to the front end, and a biasing force is applied in the front direction by a spring or the like.

In the cultivator K3, the lower side of the resistance member 7 is inclined forward by its own weight, springs, etc. as shown in FIG. 9, so that the differential gear is not locked in a state where it is not cultivated. Handle 1 from the state shown in FIG.
When the position of the rotary device 21 is lowered by lowering 3, the lower side of the resistance member 7 is immersed in the soil, and the lower side of the resistance member 7 receives the resistance of the soil during traveling and is mainly attached to the mounting bracket 24a. And rotates backward (see FIG. 10). As a result, the differential gear is locked.

When the handle 13 is raised from the state shown in FIG. 10 and the resistance member 7 is raised above the soil, the lower side of the resistance member 7 is rotated rearward from its rearward state by its own weight or a spring (FIG. 9). reference). As a result, the locked state of the differential gear is released.

FIG. 11 is a side view explanatory view showing a state in which the tail wheel is used as the sensing means and the differential gear is not locked without being cultivated. FIG. 12 is a side view explanatory view showing a state in which the differential gear is locked by cultivating the cultivator shown in FIG. 11.

Reference numeral K4 indicates a cultivator having a tail wheel 4a as a sensing means. The tail wheel 4a is provided so that the movement is transmitted to the differential gear by using a known mechanical or electrical means similar to that of the cultivator K2. The tail wheel 4a includes a wheel 40a and a trunk member 41a that rotatably supports the wheel 40a. The tail wheel 4a is mounted on a mounting bracket 24 extending rearward from the rotary cover 22 so that the trunk member 41a is slidable in the vertical direction. A downward biasing force is applied to the trunk member 41a by a spring or the like.

In the cultivator K4, the tail wheel 4a is lowered when the cultivator K4 is not cultivated, so that the differential gear is not locked. Figure 11
The handle 13 is lowered from the state shown in FIG.
When the position 1 is lowered, the ring 40a comes into contact with the surface of the soil and stops. Then, when the rotary device 21 is further lowered, the mounting bracket 24 slides downward along the trunk member 41a (see FIG. 12). As a result, the differential gear is locked.

When the handle 13 is raised from the state shown in FIG. 12 and the tail wheel 4a is raised above the soil, the ring 40a is separated from the soil and the trunk member 41a slides downward due to its own weight or a spring (see FIG. 11). ). As a result, the locked state of the differential gear is released.

In FIG. 13, the handle is used as the sensing means,
It is a side view explanatory view which shows the state which does not cultivate and the differential gear is not locked. FIG. 14 is a side view explanatory view showing a state where the differential gear is locked by cultivating the cultivator shown in FIG.

Reference numeral K5 indicates a handle 13 as a sensing means.
It shows a tiller equipped with a. The handle 13a is provided so that the movement is transmitted to the differential gear by using a known mechanical or electrical means similar to the case of the cultivator K2. The handle 13a is vertically rotatable about the base. The handle 13a is normally biased upward by the force of a spring or the like.

In the cultivator K5, the differential gear is not locked when the handle is raised as shown in FIG. When the handle 13a is lowered from the state shown in FIG. 13 to lower the position of the rotary device 21 and the handle 13a is further rotated downward around the base, the differential gear is locked (see FIG. 1).
4).

From the state shown in FIG. 14, when the handle 13a is rotated upward around the base and the rotary device 21 is further raised, the locked state of the differential gear is released (see FIG. 13).

In FIG. 15, the handle is used as the sensing means,
It is a plane view explanatory view showing the state where the differential gear is not locked without tilling. FIG. 16 is an explanatory plan view showing a state where the differential gear is locked by cultivating the cultivator shown in FIG.

Reference numeral K6 indicates a handle 13 as a sensing means.
Figure 3 shows a tiller equipped with b. The handle 13b is provided so that the movement is transmitted to the differential gear by using a known mechanical or electrical means similar to the case of the cultivator K2. The handle 13b can be rotated laterally about the base. The handle 13b has a position (FIG. 15 and FIG. 16) rotated to one side and the other side in the lateral direction, and a central position (FIG. 15 and FIG. 16).
It is stopped at three positions, and is stopped at the central position by the urging force of a spring or the like.

As shown in FIG. 15, the cultivator K6 applies a lateral force to the steering wheel when turning the steering wheel 13 and the like.
The differential gear is not locked when b is rotated in the lateral direction. When the handle is turned laterally from the state shown in FIG. 15 and stopped at the center position, the differential gear is locked (see FIG. 16). The tiller K6 cultivates by locking the differential gear and then lowering the handle 13b to lower the rotary device 21.

From the state shown in FIG. 16, the handle 13b is raised to raise the rotary device 21 above the soil. And
The handle 13b is pivoted laterally to pivot (see FIG. 15). As a result, the locked state of the differential gear is released.

FIG. 17 is a side view explanatory view showing a state in which the sensing device is provided and the differential gear is not locked without tilling. FIG. 18 is a side view explanatory view showing a state in which the differential gear is locked by cultivating the cultivator shown in FIG.

Reference numeral K7 indicates a cultivator equipped with the sensing device 8. The sensing device 8 is provided so that the movement is transmitted to the differential gear by using known mechanical or electrical means similar to the case of the cultivator K2. The sensing device 8 is provided so as to project downward from the lower side of the chain case. The sensing device 8 is rotatable in the front-rear direction around the base side, and the lower side is biased forward by a spring or the like.

In the cultivator K7, as shown in FIG. 17, the lower side of the sensing device 8 is rotated forward when the tiller K7 is not cultivated so that the differential gear is not locked. Handle 1 from the state shown in FIG.
When 3 is lowered and the position of the rotary device 21 is lowered, the sensing device 8 comes into contact with the surface of the soil, and the lower side rotates backward around the base (see FIG. 18). As a result, the differential gear is locked.

The handle 13 is raised from the state shown in FIG. 18 to raise the sensing device 8 above the soil. As a result, the lower side of the sensing device 8 is rotated backward from the state in which it is rotated backward (see FIG. 17), and the locked state of the differential gear is released.

The terms and expressions used in the present specification are for the purpose of explanation only, and are not limiting in any way, and the terms and expressions equivalent to some of the features described in the present specification and some of them are used. There is no intent to exclude the expression. Needless to say, various modifications are possible within the scope of the technical idea of the present invention.

[0081]

According to the present invention, since the differential gear is automatically locked in the tilling state, the tilling work can be carried out in a state where the straightness is enhanced and stabilized. Also,
When not in the cultivated state, the differential gear is automatically unlocked, so that turning and the like can be performed smoothly. As a result, if you forget to lock manually when plowing, for example, one wheel will not slip due to slipping on a mud or a slope, you will forget to unlock and you will go straight when turning. No need to cultivate.

[Brief description of drawings]

FIG. 1 shows an embodiment of a cultivator equipped with an automatic control apparatus for a differential gear according to the present invention, showing a state in which an operating lever is in an automatic position, and the differential gear is not locked without cultivating. FIG.

FIG. 2 is an enlarged explanatory view showing the automatic control device in the state of FIG.

FIG. 3 is a side view explanatory view showing a state in which the differential gear is locked by cultivating the cultivator with the operation lever in the automatic position.

FIG. 4 is an enlarged explanatory view showing the automatic control device in the state of FIG.

FIG. 5 is an enlarged explanatory view showing a state in which an operation lever is operated to manually lock a differential gear.

FIG. 6 is an enlarged explanatory view showing a state in which the differential gear is manually unlocked by operating the operation lever.

FIG. 7 is a side view explanatory view showing a state in which the hanging member is used as a sensing means and the differential gear is not locked without being cultivated.

FIG. 8 is a side view explanatory view showing a state in which the differential gear is locked by cultivating the cultivator shown in FIG. 7.

FIG. 9 is a side view explanatory diagram showing a state in which the resistance member is used as a sensing means and the differential gear is not locked without being cultivated.

10 is a side view explanatory view showing a state where the differential gear is locked by cultivating the cultivator shown in FIG. 9. FIG.

FIG. 11 is an explanatory side view showing a state in which the tail wheel is used as a sensing means, and the differential gear is not locked without being cultivated.

FIG. 12 is a side view explanatory view showing a state where the differential gear is locked by cultivating the cultivator shown in FIG. 11.

FIG. 13 is a side view explanatory view showing a state in which the steering wheel is used as a sensing means and the differential gear is not locked without being cultivated.

14 is a side view explanatory view showing a state where the differential gear is locked by cultivating the cultivator shown in FIG. 13. FIG.

FIG. 15 is an explanatory plan view showing a state where the steering wheel is used as a sensing means and the differential gear is not locked without being cultivated.

16 is an explanatory plan view showing a state in which the differential gear is locked by cultivating the cultivator shown in FIG. 15.

FIG. 17 is a side view explanatory view showing a state in which the sensing device is provided and the differential gear is not locked without cultivating.

18 is a side view explanatory view showing a state in which the differential gear is locked by cultivating the cultivator shown in FIG.

[Explanation of symbols] K1, K2, K3, K4, K5, K6, K7 tiller Y1, Y2 wire S compression coil spring B bolt 1 traveling device 10 axles 11 wheels 12 prime mover 13,13a, 13b handle 130 Operation lever 2 tillage equipment 20 chain case 21 Rotary device 22 Rotary cover 23 Control body 230 mounting shaft 24, 24a Mounting bracket 25 Mud flaps 3 Automatic control device 30 Attachment 31 Base member 310 axis 311 axis 32 switching unit 33 Drive member 330 force receiving member 331 Engagement member 35 Follower 350 guide hole 351 mounting shaft 352 Fitting recess 36 Information 37 Guide 38 Mounting bracket 39 Action transmission member 390 Removal prevention member 391 Stopper member 4,4a tail wheel 40a wheel 41a Trunk member 5 Cover member 6 Hanging members 60 weights 61 hanging bracket 7 Resistance member 8 Sensing device

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Mitsuo Hayashi             22 548 Hiyoshi, Hirokawa-cho, Yame District, Fukuoka Prefecture               Within Olek Co., Ltd. F term (reference) 2B033 AA06 AB01 AB11 AC04 DB32                       DB34 DB37 DB48 EC10                 2B043 AA04 AB08 AB19 BA01 BB03                       DA01 DA05 DC04 EA02 EA12                       EB12 EB14 EB22                 3D042 AA02 AA03 AA10 AB14 CA02                       CA11 CA17 CA18 CB01                 3D043 AA02 AA03 AA10 AB14 BA07                       BC02 BC06 BC09 BD01 BE03                       BF05 BF07

Claims (11)

[Claims] 1. A device for automatically controlling locking and unlocking of a differential gear of a tiller, comprising means for detecting when the tiller is in the tilling state and / or when not in the tilling state, and when the tiller is in the tilling state. Lock the differential gear,
An automatic control device for a differential gear of a cultivator, comprising: means for releasing a lock of the differential gear when not in the cultivated state. 2. A device for automatically controlling locking and unlocking of a differential gear of a tiller, comprising sensing means for detecting when the tiller is in the tilling state and / or when not in the tilling state, and when in the tilling state. Locked the differential gear,
A control device for releasing the lock of the differential gear when not in the cultivated state, the control device comprising a switching means for switching between the lock and unlocked states of the differential gear, and one end of the sensing means. Of the differential gear of the cultivator, characterized in that it is provided on the side and the other end side is provided on the side of the switching means, and is provided with an action transmission means for transmitting the movement of the sensing means to the switching means. Automatic control device. 3. A manual operating device for manually locking and unlocking a differential gear is provided, and when the differential gear is locked or unlocked by the manual operating device, even when the sensing means senses a cultivated state. The automatic control device for a differential gear of a cultivator according to claim 1 or 2, wherein the movement of the sensing means is not transmitted to the switching means. 4. The automatic control device for a differential gear of a cultivator according to claim 1, wherein the sensing means senses a cultivated state when it comes into contact with soil. 5. The cultivator is adapted to be cultivated in a state where the cultivating blade is tilted by lowering it from the position when it is not in the cultivating state, and the sensing means is tilted in the direction in which the cultivator lowers the cultivating blade. The automatic control device for a differential gear of a tiller according to claim 1, 2 or 3, characterized in that the tiller state is sometimes sensed. 6. The cultivator is adapted to be cultivated in a state in which a cultivating blade is lowered from a position when it is not in the cultivating state,
The differential of the tiller according to claim 1, wherein the sensing means senses a tilling state when the handle further descends from a state where the tilling blade is lowered and is in contact with the soil. Automatic gear control. 7. The cultivator is such that the handle is movable laterally with respect to the traveling direction and is cultivated in a state in which it is stopped at a predetermined position. The automatic control device for the differential gear of the tiller according to claim 1, wherein the tiller state is sensed when stopped at the position. 8. The method according to claim 1, 2, 3, 4, 5, 6 or 7.
A cultivator equipped with the automatic control device for the differential gear described. 9. A traveling device equipped with wheels, a prime mover and a handle, a cultivating device, and a control device for automatically controlling the differential gear according to claim 1, 2, 3, 4, 5, 6 or 7. However, an operating portion for operating the control device is provided in the vicinity of the grip portion of the handle, and the operating portion and the control device are connected via a power transmission means, Tiller. 10. A cultivator comprising: when the cultivator is in the cultivating state, it is detected to automatically lock the differential gear, and when it is not in the cultivating state, the differential gear is detected to be automatically unlocked. Driving control method. 11. A method for controlling traveling of a tiller, comprising automatically locking a differential gear when the sensing means comes into contact with soil.