JPH10243702A - Rotary plowing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary plowing device capable of exchanging the direction of an input power of the rotary shaft in a regular or a reverse direction, also the rotations of first and second rotary shaft so as to rotate in a reverse direction or in a same direction each other for selecting an optimum plowing form according to the conditions of a field. SOLUTION: This rotary plowing device can exchange the rotation of a sprocket 35 to a regular or a reverse rotation by selectively biting sliding gear 25 so as to bite the big gear 25a with an idle gear 26b or a small gear 25b with a gear 27. A claw crutch is selectively connected with the claw crutch of a first side gear or the claw crutch of a second side gear by a shift folk 55, and a reversing mechanism changes the rotation of rotary shafts in a reverse rotating direction or a same rotating direction each other. Thereby, 4 kinds of plowing forms can be selected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary tilling apparatus in which first and second rotary shafts are arranged coaxially and tilling claws are mounted on each shaft.
The present invention relates to a rotary tilling apparatus capable of switching input rotation to a second rotary shaft in a forward / reverse direction and switching the first and second rotary shafts to rotate in opposite directions or in the same direction.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 62-239901, a traveling chain case and a tilling chain case are formed integrally with a transmission case, and a single operation lever is used to control the inside of the transmission case. There are tillers that operate the gears to switch the traveling speed between low speed, high speed, and reverse and switch the tilling claw between normal rotation and reverse rotation.

As shown in Japanese Patent Publication No. Hei 7-114561, the left and right sides of a tilling transmission case are
The first and second rotary shafts are arranged coaxially, and at the same time,
Tillers that plow by rotating the tilling claw forward and reverse have been devised.

[0004]

SUMMARY OF THE INVENTION The above Japanese Patent Application Laid-Open No. 62-23 / 1987
In the field of No. 9901, in a soft field, plowing is performed by forward drive, and in a hard field, dashing occurs in the forward drive, so that plowing is performed in reverse, but depending on the hardness of the field scene, efficiency may be reduced. It will be bad work.

In Japanese Patent Publication No. Hei 7-114561, the tilling work can be performed while the first and second rotary shafts are reversely rotated to prevent dashing. In some cases, efficient work could not be performed.

Accordingly, the present invention is capable of switching the input to the rotary shaft between forward and reverse, and switching the first and second rotary shafts to rotate in opposite directions or in the same direction.
It is an object of the present invention to provide a rotary tillage device capable of selecting an optimum tillage state according to field conditions and the like.

[0007]

According to a first aspect of the present invention, a tilling claw (3) is provided at a lower portion of a transmission case (19).
, 34 ′) having a first rotary shaft (31, 31).
a) and the second rotary shaft (32) are coaxially arranged;
A rotary tilling device (16) configured to transmit rotation of the rotation transmitting means (35) in the transmission case to the first rotary shaft and the second rotary shaft via a reversing mechanism (30, 30). , A forward / reverse switching means (A) for selectively transmitting forward or reverse rotation to a rotation transmitting means (35) in the transmission case, and operating the reverse rotation mechanism to connect the first and second rotary shafts. And a reverse rotation mechanism switching means (B) for locking the reverse rotation mechanism and switching the first and second rotary shafts to the same direction. Rotary tilling equipment.

According to a second aspect of the present invention, the reversing mechanism (30) is rotatably supported by the first rotary shaft (31) while being interlocked with the rotation transmitting means (35). A first side gear (45), a second side gear (47) connected to the second rotary shaft (32), and rotatably supported by the first rotary shaft (31); A center gear (46) meshed with both side gears and supported by a center pin (51) orthogonal to the rotary shaft, wherein the reversing mechanism switching means (B) is provided with the first rotary shaft (31). ), The claw clutch (53) to be spline-fitted is moved in the axial direction,
Claw clutch (45) provided inside both side gears
a) or (47a), the position of driving the first side gear (45) and the position of the second side gear (4).
7) The rotary tilling device according to claim 1, further comprising a shifter (55) that switches between a driving position and a driving position.

[Operation] Based on the above configuration, the rotary tillage device (16) travels by being mounted on the tiller (1), for example, while the rotation of the engine or the like is switched between forward and reverse switching means (A) and a reverse rotation mechanism. The power is transmitted to the first and second rotary shafts (31, 31a) and (32) via (30), and the tilling claws (34, 34 ') are rotated for tilling.

[0010] At this time, the operator, depending on the field conditions,
The following four states can be switched.

When the risk of dashing is high because the field is very hard or the like, the forward / reverse switching means (A) is reversed and the reverse mechanism switching means (B) is selected in the same rotation direction. In this state, the reversing mechanism (30) is locked, the first and second rotary shafts rotate in the same direction, and all the tilling claws (3
, 34 ') rotate in the reverse direction (the direction opposite to the running wheels).

[0012] When the traveling property is difficult due to the softness of the field or the like, the forward / reverse switching means (A) is selected to be forward rotation and the reverse rotation mechanism switching means (B) is selected to be in the same rotation direction. In this state, the first and second rotary shafts rotate in the same direction,
All tilling claws rotate in the forward direction (the same direction as the running wheels).

When the field is slightly hard, the forward / reverse switching means (A) is selected for reverse rotation and the reverse rotation mechanism switching means (B) is selected for reverse rotation. In this state, the first rotary shaft (31, 3)
1a), the reverse rotation is transmitted from the rotation transmitting means (35), and the reverse rotation mechanism (3) is transmitted to the second rotary shaft (32).
0), the rotation opposite to the rotation transmitting means (35), that is, the forward rotation is transmitted. Generally, the first rotary shaft (31, 3
1a) has more tilling nails mounted than the second rotary shaft (32), so that many tilling nails rotate in the reverse direction and less tilling nails rotate in the forward direction.

When the field is slightly soft, the forward / reverse switching means (A) is selected for forward rotation and the reverse rotation mechanism switching means (B) is selected for reverse rotation. In this state, the first rotary shaft (3
1, 31a) is transmitted from the rotation transmitting means (35) to the second rotary shaft (32), and the reverse rotation, that is, the reverse rotation is transmitted to the second rotary shaft (32) via the reverse rotation mechanism (30). The claws rotate forward, and the small tilling claws rotate in reverse.

The reference numerals in the parentheses are for comparison with the drawings, but do not limit the configuration of the present invention.

[0016]

According to the first aspect of the present invention, four different types of tillage can be selected by operating the forward / reverse switching means and the reverse rotation mechanism switching means, and the most suitable rotary type according to the field conditions and the like can be selected. Tilling work can be performed with high work efficiency.

According to the second aspect of the present invention, the reversing mechanism is constituted by a simple structure comprising three bevel gears arranged on the first and second rotary shaft portions, and the first rotary shaft is provided with a spline. The reverse rotation mechanism switching means has a simple structure in which the engaged pawl clutch is moved in the axial direction, and is switched to and connected to one of the pawl clutches provided inside the both side gears. The reversing mechanism and the reversing mechanism switching means can be compactly arranged at the lower part of the transmission case, and the parts can be shared with the rotary plow having no reversing mechanism or the reversing mechanism and the reversing mechanism switching means. This makes it possible to make a wide variation without a large increase in cost.

[0018]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the appearance of a tilling machine 1 to which the present invention is applied. The cultivating machine 1 has a body frame 3 supported by left and right running wheels 2, 3 has an engine 5 and a balance weight 6 at the front.
, And a transmission 7 is disposed at the rear. A belt transmission 9 is wound between the output shaft of the engine 4 and the input shaft of the transmission 7.

The transmission 7 has a traveling transmission system and a working machine transmission system. The traveling transmission system has a plurality of forward gears and a reverse gear, and the traveling wheels 2 are moved through a chain in a chain case 10. It is transmitted to. In addition, a handle 12 extends rearward from the transmission case 11, and one operating lever 13 extends. The operation lever 13 shifts the traveling speed to a plurality of forward speeds, a reverse speed, and a neutral position.

On the other hand, a rotary tilling device 16 is mounted on a rear portion of the body frame 3 via a hitch 15. The rotary tilling apparatus 16 has a rotary main body 17, on which a rotary chain case 19, a tail wheel 18 and the like are arranged. Rotary chain case 1
9 and the input shaft 20 as shown in FIGS.
Is rotatably supported, and a chain case 21 serving as a working machine transmission system of the transmission 7 is mounted on the input shaft.
Power is transmitted through the chain inside.

The upper bulge 19a of the chain case 19 has the input shaft 2 as shown in detail in FIG.
0 is rotatably supported and two shafts 22, 23
Is fixed and supported, and the input shaft 20 has a large gear 2
A shifter gear 25 composed of a gear 5a and a small gear 25b is spline-fitted so that it can slide only. An idle gear 26 composed of a large gear 26a and a small gear 26b is rotatably supported on the shaft 22, and a large gear 27 and a sprocket 29 are integrally supported on the shaft 23 so as to be rotatable only. ing.

The slide gear 25 meshes the large gear 25a and the idle gear 26a, so that the rotation of the input shaft 20 is transmitted to the sprocket 29 as the same direction rotation via the gear 25a, the idle gear 26 and the large gear 27. ,
Further, by directly meshing the small gear 25b with the large gear 27, the rotation of the input shaft 20 is transmitted to the sprocket 29 as a reverse rotation, so that these gear devices constitute the forward / reverse switching means A.

On the other hand, the rotary chain case 19
(The chain case is hereinafter referred to as a center case because the chain case is a center drive system).
0 and first and second rotary shafts 31, 32, 32 are provided. The first rotary shaft 31 extends right and left through the center case 19, and the second rotary shafts 32, 32 coaxially move right and left from the center case so as to be fitted with the first rotary shaft. It is arranged to protrude. Extension shafts 31a, 31a are integrally fixed to the left and right of the first rotary shaft 31, respectively.
A plurality of leaf-shaped tilling claws 34 having blades on both front and rear surfaces are provided on these extension shafts. The second rotary shaft 32 is also provided with tilling claws having blades on both front and rear surfaces, and one tilling claw 34 'has a curved shape that is deeper than the other.

A sprocket 35 is spline-fitted and fixed to the central portion of the first rotary shaft 31, and a chain 36 is wound between the sprocket 35 and the sprocket 29.

The reversing mechanism 30 and the first and second rotary shafts 31 and 32 are bilaterally symmetric, and only one of them will be described below.

The lower portion of the center case 19 is slightly swelled, and the shift fork 5 is provided inside the upper portion of the swelled portion 19b.
A bracket 57 for supporting the fulcrum shaft 56 is disposed,
A holder 39 is fixed to the outside of the lower portion of the bulging portion 19b with a bolt so as to sandwich the center case 19.

Further, a second rotary shaft 32 is rotatably supported on the inside of the distal end of the holder 39 via a bearing 41, and a bearing 42 is attached to the second rotary shaft 32.
The first rotary shaft 31 is rotatably supported via the.

The reversing mechanism 30 is, as shown in FIG.
It has three bevel gears 45, 46, 47, and the central gear (first side gear 45) has a pawl clutch portion 45 a inside and outside, and a first rotary shaft separately from the sprocket 35. 31 is rotatably loosely fitted. The left and right outer gears (second side gears 47) have pawl clutch portions 47a inside and are rotatably supported by the first rotary shaft 31, and the boss portions extend outward to form the second right and left gears. The spline is engaged with the inner diameter of the second rotary shaft 32.

Further, a center gear 46, which is located between the two side gears 45 and 47 and meshes with both gears, is rotatable (rotated) about a center pin 51 and is also rotated about a rotary shaft 31. It is free (orbiting).

The boss 39a of the holder 39 is
It extends inward and fits into the inner diameter of the center case 19 to hold the center gear 46 and
1 has a through hole for fitting, and constitutes a holder for supporting the center pin 51.

The center pin 51 is, as shown in FIG.
The inside has a spherical outer diameter, and the inside has the claw clutch portion 45.
a, formed integrally with a boss portion 51a having a hole for enclosing the claw clutch portion 47a and the claw clutch 53, and supported by the boss 39a of the holder 39.

The claw clutch 53 has claw clutch portions 45a and 53b engaged with the claw clutch portion 45a and the claw clutch portion 47a on both the inside and the outside, and the tip of the shift fork 55 on the outer periphery of the main body. The first rotary shaft 31 is provided with a groove 53c with which the portion 55a engages.
And is always slidably fitted with the sprocket 35, which is the rotation transmitting means.

As described above, the first rotary shaft 31 is spline-fixedly fitted to the sprocket 35 at the center of the center case 19, the first side gear 45 is loosely fitted, and the pawl clutch 53 is splined and fitted. The sprocket 35 rotates the same as the sprocket 35 supported by the needle bearing 54 provided on the inner diameter of the second side gear 47 and the bearing 42 provided on the inner diameter of the second rotary shaft 32.

At two places before and after the boss 51a of the center pin 51, a long hole 51b is drilled, and a tip 55a of the shift fork 55 having a bifurcated tip faces the long hole 51b. The claw clutch 53 is slidable left and right by engaging with the groove 53c of the claw clutch 53.

The upper portion of the shift fork 55 is supported by the fulcrum shaft 56 and has a lever 55b directed inward of the center case 19. A long hole 55c is bored at the tip of the lever 55b. 55 long holes 5
5c, the operation rod 57 is engaged.

That is, when the operating rod 57 is pulled up, the pawl clutch 53 is moved through the tip 55a of the shift fork 55.
Is moved inward, the claw clutch 53 and the first side gear 45 rotate the same, and the operating rod 57 is pushed down.
The claw clutch 53 is moved outward via the tip end 55a of the shift fork 55, and the claw clutch 53 and the second side gear 47 are rotated in the same direction.

Next, the structure of switching the reverse rotation mechanism will be described.

The first side gear 45 and the second side gear 47 are opposed to each other with a center gear 46 interposed therebetween. Each of the first side gear 45 and the second side gear 47 is rotatably supported by the first rotary shaft 31. So it always rotates in the opposite direction.

The power transmitted to the sprocket 35 arranged at the center of the center case 19 always rotates the first rotary shaft 31 fixedly fitted by the spline in a fixed direction.

The pawl clutch 53 slidably fitted to the spline on the first rotary shaft 31 is moved inward, and the pawl clutch 53 a provided inside the pawl clutch 53 is moved to the first side gear 45. Claw clutch part 4 provided inside
5a, the power is sprocket 35 → first rotary shaft 31 → claw clutch 53 → first side gear 4
5 → the center gear 46 → the second side gear 47 → the second rotary shaft 32, and the first rotary shaft 31
And the second rotary shaft 32 rotate in the reverse rotation direction.

On the other hand, the pawl clutch 53 is moved outward,
Claw clutch portion 53b provided inside claw clutch 53
Is engaged with the pawl clutch portion 47a provided inside the second side gear 47, the power is supplied from the sprocket 35 → the first rotary shaft 31 → the pawl clutch 53 → the second side gear 47 → the second rotary shaft 32. , And the first rotary shaft 31 and the second rotary shaft 32 rotate in the same rotation direction.

At this time, the rotation is transmitted to the second side gear 47 → the center gear 46 → the first side gear 45, but the first side gear 45 is rotatable with respect to the first rotary shaft 31 and idles. Power is not transmitted.

Accordingly, a reversing mechanism switching means B for switching the rotation direction of the second rotary shaft 32 to the same or reverse rotation state with respect to the first rotary shaft 31 by operating the operating rod 57 up and down.

The upper end of the operating rod 57 is operatively connected to an operating lever 63 for switching forward / reverse by sliding the shifter gear 25 on the upper portion of the center case 19, and moving the operating lever 63 in the left / right direction allows forward / reverse switching. The reverse rotation mechanism can be switched by moving the operation lever 63 in the vertical direction.

Next, the operation of the tiller 1 will be described. The rotation of the engine 5 is transmitted to the transmission 7 via the belt transmission 9, and further, by operating the operation lever 13, the predetermined rotation switched to a plurality of forward and reverse stages is transmitted to the traveling wheels 2, and the cultivator 1 Moves at a predetermined speed.

On the other hand, the rotation of the transmission 7 is transmitted to the input shaft 20 of the center case 19 via the chain in the chain case 21. The rotation of the input shaft 20 is switched between forward and reverse by the forward / reverse switching means A, and transmitted to the sprocket 35 via the sprocket 29 and the chain 36.

That is, by operating the operation lever 63 right and left, the slide gear 25 is slid, and the large gear 2
5a is selectively meshed with the gear 26b or 27. When the gears 25a and 26a are in mesh with each other, the rotation of the input shaft 20 is controlled by the gear 2
5a, the idle gears 26a and 26b, and the large gear 27, the rotation in the same direction as the input shaft 20 is transmitted to the sprocket 29. When the gears 25b and 27 mesh with each other, the rotation of the input shaft 20 , 27, the rotation of the input shaft 20 in the opposite direction is transmitted to the sprocket 29.

The forward or reverse rotation transmitted to the sprocket 35 is directly transmitted to the first rotary shaft 31 and is also transmitted to the left and right second rotary shafts 32 via the reverse rotation mechanisms 30, 30. You. At this time, the reverse rotation mechanism 30 is switched to the reverse rotation direction or the same rotation direction by the reverse rotation mechanism switching means B.

That is, by appropriately operating the operation lever 63, the following four types of tillage are selected.

When there is a dry field, a rice plant, etc., in a very hard field, and there is a high risk of dashing, the forward / reverse switching means A is selected for reverse rotation and the reverse rotation mechanism switching means B is selected for the same rotation direction. In this state, the first and second rotary shafts 31 and 32 rotate in the reverse direction, all the tilling claws are reversed, and the occurrence of dashing is prevented.

In the case where the field is very soft due to sand or the like, which makes traveling difficult, or when ridge work is performed, the forward / reverse switching means A is driven forward and the reverse mechanism switching means B is driven in the same rotation direction. select. In this state, the first and second rotary shafts 31 and 32 rotate in the normal rotation direction, and all the tilling claws rotate in the normal direction, and are urged in a direction to assist the traveling of the cultivator 1.

When the field is slightly hard, the forward / reverse switching means A is selected for reverse rotation and the reverse rotation mechanism switching means B is selected for reverse rotation. In this state, the first rotary shafts 31, 31
a is reversed, the second rotary shaft 32 is rotated forward, and
Many tilling claws mounted on the first rotary shaft are reversed,
A small number of tilling claws mounted on the second rotary shaft rotate forward.

When the field is slightly soft, the forward / reverse switching means A is selected for normal rotation and the reverse rotation mechanism switching means B is selected for reverse rotation. In this state, the first rotary shaft 31,
31a rotates forward, the second rotary shaft 32 reverses, and thus a large number of tilling claws mounted on the first rotary shaft rotate forward, and a small number of tilling claws mounted on the second rotary shaft rotate reversely. I do.

In the above description, the above-mentioned four types of tillage are selected according to the hardness of the field. However, the present invention is not limited to this. Of course it is good. Although the above-described embodiment has been described with respect to the tiller, it is needless to say that the present invention can be similarly applied to a rotary tiller mounted on a tractor.

[Brief description of the drawings]

FIG. 1 is a side view showing a cultivator to which the present invention is applied.

FIG. 2 is a front sectional view showing a main part of the rotary plow.

FIG. 3 is a side view showing a main part of the rotary plow.

FIG. 4 is a detailed sectional view of a main part of FIG. 2;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Cultivator 2 Running wheel 16 Rotary tilling device 19 Transmission case (rotary chain case, center case) 20 Input shaft 25 Slide gear 26 Idle gear 27 Large gear 30 Reverse rotation mechanism 31, 31a First rotary shaft (extended shaft) 32 First 2 rotary shafts 45 first side gear 46 center gear 47 second side gear 51 center pin 53 pawl clutch 55 shift fork 57 operating rod 63 operating lever A forward / reverse switching means B reverse switching mechanism switching means

Claims (2)

[Claims] A first rotary shaft and a second rotary shaft each having a tilling claw are coaxially arranged at a lower portion of a transmission case, and the rotation of a rotation transmission means in the transmission case is controlled by:
In a rotary tilling device, which transmits the rotation to the first rotary shaft and the second rotary shaft via a reverse rotation mechanism, forward / reverse transmission for selectively transmitting forward rotation or reverse rotation to rotation transmission means in the transmission case. Switching means; a position at which the first and second rotary shafts are rotated in opposite directions by operating the reverse rotation mechanism; and the first and second rotary shafts are locked in the same direction by locking the reverse rotation mechanism. And a reversing mechanism switching means for switching to a rotating position. 2. The reverse rotation mechanism is linked to a first side gear rotatably supported by the first rotary shaft and linked to the second rotary shaft while being interlocked with the rotation transmitting means, and A second side gear rotatably supported by the first rotary shaft, and a center gear meshed with both side gears and supported by a center pin orthogonal to the rotary shaft. The mechanism switching means moves the claw clutch, which is spline-fitted to the first rotary shaft, in the axial direction, and connects the claw clutch to one of the claw clutches provided inside the both side gears, thereby forming the first side gear. The position of the drive and the second
The rotary tillage device according to claim 1, further comprising a shifter configured to switch to a position for driving the side gear.