JPS6216601B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a center drive type tilling device in which a tilling shaft is supported by protruding left and right from a drive case.

In conventional tillage devices of this type, the left and right tillers are driven together by a drive chain mechanism inside the drive case, so when turning around at a corner of a field, for example, the tiller must be lifted from the ground surface. However, when performing this turning operation, you must also operate the brake, disengage the clutch, and even turn the steering wheel at the same time, making turning the tiller and other tools extremely tiring. .

Therefore, in order to solve the above-mentioned deficiencies of the conventional art, it is an object of the present invention to propose a tilling device that does not require lifting the tiller even during turning operations. It is an object of the present invention to provide a tilling device in which tilling shafts are respectively rotatably supported by a differential gear mechanism housed in the drive case so as to be independently rotationally driven. That is, the left and right tilling shafts 7 and 9 are connected to the differential gear mechanism 1.
3, so when the tilling device is rotated, the tilling shaft on the inside of the tiller rotates at a low speed, and the tiller shaft on the outside of the rotator rotates at a high speed. As a result, there is no need to lift the tiller from the ground surface during turning operations, and you can just turn the machine as it is, making turning operations extremely easy. As a result, work efficiency has been further improved compared to conventional tillage equipment.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings. For convenience of explanation, conventionally known configurations will also be explained at the same time. A differential case 2 and a sprocket wheel 3 are pivotally supported on the lower left and right sides of the drive case 1 by bearings 4 and 5, respectively, and the differential case 2 and sprocket wheel 3 are fixed to each other with bolts 6. The differential side gear 8 fitted on the left tilling shaft 7 can be freely rotated to the differential case 2, and the right differential side gear 10 fitted on the right tilling shaft 9 can only be rotated freely to the sprocket wheel 3. The bevel gears 11 and 12 mesh with the differential side gears 8 and 10 to form a differential gear mechanism 13.

The illustrated tilling device has a mounting flange 16 welded to an opening 1a provided in the upper part of the drive case 1, and a mounting leg 17a that can be inserted into the opening 1a.
and a lid part 17b that matches the mounting flange 16 and can be fixed with bolts 18..., and the input shaft 19 that receives rotational power from the traction machine is connected to the bearings 20, 21 on the lid part 17b. The bevel gear 2 is fitted onto an intermediate shaft 24 which is supported by bearings 22 and 23 and which is supported by bearings 22 and 23 to the mounting foot 17a.
5 is meshed with a bevel gear 26 provided on the input shaft 19, and a drive chain 28 is wound between the sprocket wheel 27 fitted on the intermediate shaft 24 and the sprocket wheel 3 of the differential gear mechanism 13.
Further, pipes 29, 29 extending left and right are welded to the upper part of the drive case 1, reinforcing frames 30, 30 are welded to the left and right ends of the pipes 29, 29, and the rear parts are welded to the reinforcing frames 30, 30. The front ends of the connecting rods 31, 31 can be connected to a hitch of a towing machine. Further, tilling bodies 33 and 34 equipped with tilling claws 32 are attached to the tilling shafts 7 and 9 with bolts 35, respectively.

The reference numeral 14 in the figure is a differential clutch, which is fitted into the spline boss 9a of the right tilling shaft 9 so as to be slidable only in the axial direction. Also, by engaging the clutch pawl 14a of the differential clutch 14 with the clutch pawl 3a provided on the sprocket wheel 3 against the return spring 15, the left and right tilling shafts 7, 9 are rotated through the differential case 2. are formed so as to be integrated, but in this invention,
This differential lock mechanism does not necessarily require this. That is, tilling claws 32, 32... are attached to the outer peripheries of the tilling bodies 33, 34, and these tilling claws 32, 32... are located in muddy soil,
Moreover, since it is towed by a traction machine, even if the soil conditions on the left and right sides change, the tiller on the side with less resistance simply tries to turn faster. Furthermore,
If these cultivating bodies 33 and 34 try to turn quickly,
Since the entire tillage device is constantly moved to new uncultivated soil in front by a traction machine, the tiller claws 32,
The tilling resistance acting on 32... suddenly increases, and the rotation increase above a certain level is automatically braked by the digging resistance. That is, the left and right tilling bodies 33 and 34 till the soil at a rotation speed that provides the same digging resistance. In this case, the tilled soil masses on the left and right may not be the same. Therefore, if there is a large difference between the left and right tilled soil clods and it is inconvenient for practical use, the above-mentioned deflock mechanism may be used, but under normal soil conditions, there is no need for a deflock mechanism. In fact, in normal rotary work, plowing work is carried out smoothly without using a defrock mechanism. Furthermore, code 1
4b indicates a shifter groove of a clutch shifter not shown.

As described above, the tilling device according to the present invention has tilling shafts 7 and 9 supported on the left and right sides of the drive case 1, respectively.
are constructed so that they can each be rotated independently of each other by the differential gear mechanism 13 built into the drive case 1, so that, for example, when turning the machine near a corner of a field, The rotational speed (ni) of the tilling shaft on the inner side of turning becomes smaller, and conversely the rotational speed of the tilling shaft on the outer side of turning (no) becomes larger, so there is no need to lift the tiller, and it is extremely The differential gear mechanism 1 can be rotated smoothly.
Due to the rotation speed characteristics of 3, the sprocket wheel 3
The left and right tillers 33 and 34 rotate while always maintaining the relationship of rotational speed (ns)=ni+no/2.

As described above, the tilling device of the present invention does not need to lift the rotor during turning operation and just turns the aircraft, making turning operation extremely easy. Since plowing work is also performed using a rotor, the efficiency of plowing work can be further improved.

[Brief explanation of the drawing]

The figure is a longitudinal sectional front view showing an embodiment of the present invention. Description of symbols, 1... Drive case, 1a... Opening, 2... Differential case, 3, 27... Sprocket foil, 3a, 14a... Clutch pawl, 6, 1
8, 35... Bolt, 4, 5, 20, 21, 2
2, 23... Bearing, 7, 9... Tilling shaft, 9
a... Spline boss, 8, 10... Differential side gear, 11, 12... Bevel gear, 13... Differential gear mechanism, 14... Differential clock clutch, 14
b...Shifter groove, 15...Return spring, 16...Mounting flange, 17...Bearing cover, 17a...Mounting foot, 17b...Lid, 19...Input shaft, 24...
Intermediate shaft, 25, 26... Bevel gear, 28... Drive chain, 29... Pipe, 30... Reinforcement frame, 3
1... Connecting rod, 32... Tilling claw, 33, 34...
Cultivated body.

Claims (1)

[Claims] 1. A tillage device which is provided with tillage shafts supported on the left and right sides of a drive case so that they can be independently rotated by a differential gear mechanism built into the drive case.