JPS6310Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention is an invention regarding a power transmission device for a rotary tiller installed at the rear of a traveling transmission case of a tiller, a management machine, a tailor, etc.

(b) Prior Art Conventionally, the technology of constructing a power transmission device using a bevel gear and a bevel gear box is well known.
There is also a known technique for changing gears by replacing the bevel gearbox.

For example, Utility Model Publication No. 48-10083, Utility Model Application Publication No. 54-
Such as Publication No. 88315 and Publication No. 15130 of 1972.

(c) Problems to be Solved by the Invention In the present invention, the power transmission device is not only composed of a bevel gear and a bevel gear box, but also allows for reverse rotation and speed change operation.

Agricultural work performed using tillers and the like has become diverse, and rotary tillers have come to be equipped with special working machines. For example, soil lifting work in wheat culturing requires equipping with soil lifting claws and rotating the tilling claw shaft clockwise, which requires rotation in the opposite direction to the rotation direction of conventional hatchet claws.

In order to be compatible with these diversified working machines, the present invention is equipped with a reversing clutch so that the rotation of the pawl shaft of the rotary tiller can be reversed within the power transmission case.

(d) Means for solving the problem The purpose of the present invention is as described above. Next, the configuration for achieving the purpose will be explained.

PTO shaft 25a of traveling transmission case 1,
In the power transmission device 10 between the input shafts 33 of the tilling case 12, one side is a bevel gear box 10a which is a combination of bevel gears and further includes a reversing clutch device, and the other side is a bevel gear box 10a that is always in mesh and has a different number of teeth inserted into the shaft. The spline holes should have the same diameter.
The bevel gearbox 10b enables speed change by being installed in place of the orthogonal input and output side shaft insertion portions, and both bevel gearboxes 10a and 10a.
10b, parallel space rod 38 and transmission shaft 37
It is connected by .

(E) Embodiment The purpose of the present invention is as described above, and the structure of the present invention will be explained based on the structure of the embodiment shown in the attached drawings.

FIG. 1 is an overall side view of the management machine with a rotary tiller attached to the rear.

The management machine is mainly composed of a mission case 1, and a handle 2 which can be attached back and forth is pivotally fixed to the upper part of the mission case 1. The handle 2 is provided with left and right clutch levers 29, a belt tension lever 30, and the like.

An engine frame 3 is protruded from the lower front part of the transmission case 1, and an engine 4 is placed on the engine frame 3. Further, a stand 5 is pivotally supported below the engine frame 3 so as to be freely protrusive and retractable. Power is transmitted from the engine 4 to the input shaft 25 of the transmission case 1 by winding a V-belt, and the belt tension lever 30 connects and disconnects the power.

6 is a safety cover for the V-belt.

A hitch 7 is protruded from the rear of the cultivation case 1, and a tilling frame 15 of a rotary tilling device is attached with a hitch pin 19. The joint portion with the hit pin 19 is tightened by the tightening device 18 to securely fix it. A tilling case 12 is fixed to the tilling frame 15, and bevel gear boxes 10a and 10b, a bevel gear, and a transmission shaft 37 are installed between the input shaft 33 of the tilling case 12 and the PTO shaft 25a of the transmission case.
A power transmission device 10 consisting of space rods 38 parallel to the above is constructed.

In order to fix the power transmission device 10 to the aircraft body side, a fixing piece 11 is provided protruding from the upper part of the tilling case 12, and an elastic fastener 45 is engaged with the fixing piece 11 to fix the tilling case. Tilling claw shaft 1 below 12
3 and 13 are provided on the left and right, and tilling claws 14 are arranged around them.

A tilling center cover 20 is attached to the lower surface of the tilling frame 15, and hinges 21 and 22 are provided at the edges. Left and right tilling covers that can be opened in a V-shape are provided on the hinge extending from the tilling center cover. 1
Reference numeral 6 designates a tail wheel for mounting a fitting 19 for a groove cutter or the like. The displacement lever 23 is connected to the handle 2 from the transmission case 1.
It is placed facing downward.

FIG. 2 is a rear sectional view of the mission case 1, and FIG. 3 is a side view.

Power from the engine 4 is transmitted to the input shaft 25 . The other end of the input shaft 25 protrudes, and the PTO shaft 25a
It consists of A transmission gear device 31 is configured in the upper part of the transmission case 1, and a transmission shifter 26.
27 with the shift lever 23 shown in FIG. 1, two forward speeds and one reverse speed can be obtained. The left and right steering clutch devices 32 are linked to the clutch arms 28, 28, and the steering wheel 2
By operating the clutch levers 29, 29, the rotation of the axles 9, 9 is connected and disconnected.

FIG. 4 is a front view of the tilling case portion, and FIG. 5 is a rear sectional view of the tilling case portion.

Power is transmitted from the power transmission device 10 of the tilling input shaft 33 and is transmitted to the sprocket 36 via the clutch sliding body 35. The clutch sliding body 35 is connected and disconnected by the tilling clutch lever shaft 34.

FIG. 6 is a partial cross-sectional view of the top surface of the power transmission device 10;
FIG. 7 is a rear sectional view of the elastic fastener.

A bevel gear 39 is provided in the bevel gear box 10a on the transmission case side of the power transmission device 10,
There are bevel gears 40 and 53 that rotate in the opposite direction and mesh with it.

The bevel gears 40 and 53 are fitted to the transmission shaft 37 using bearing metal, so they cannot be left as they are.
The rotation of the PTO shaft 25a is not transmitted to the transmission shaft 37. Clutch sliding body 5 is spline-fitted and slides on the transmission shaft 37 between the bevel gears 40 and 53
2 is slid by the shifter 54 and engages with the clutch pawls 40a, 53a of the bevel gears 40, 53, forward or reverse rotation is transmitted to the transmission shaft 37 for the first time.

The tillage case side bevel gear box 10b includes
Bevel gears 42 and 41 are incorporated, and the input side and output side of the bevel gear box 10b can be switched.

The bevel gears 41 and 42 have different numbers of teeth, and the gears can be changed by changing the number of teeth. Since the spline holes of both bevel gears 41 and 42 have the same diameter, both the transmission shaft 37 and the tilling input shaft 33 can be fitted therein. An engaging fitting 51 is fixed to the bevel gear box 10a on the transmission case side, and an engaging fitting 50 is fixed to the bevel gear box 10b on the tilling case side, and a space rod 38 is connected to the pin 43 between both the engaging fittings 50 and 51. The bevel gear boxes 10a and 10b are engaged with each other to prevent them from falling off in the front and rear direction.

Since the engagement fitting 50 has two openings for inserting the space rod 38 in the right angle direction, it is possible to switch between the input side and the output side.

The power transmission device 10 is fastened to the tilling case 12 by attaching one end of the elastic fastener 45 to the fixing rod 11 with the bolt 4.
7 and after winding the space rod 38, the hook 44 is hooked onto the tip of the fixing piece 11 and fixed.

(f) Effects of the invention Since the invention is constructed as described above, it has the following effects.

Firstly, it has become possible to reverse the rotation of the tilling claws of working machines, especially rotary tillers, making it possible to use them for tasks such as soil-filling of wheat, increasing the scope of application to working machines. It became wider.

Second, the conventional reversing mechanism was installed in the tilling case or the transmission case, which was expensive in terms of price and cost. However, by installing it in the power transmission device 10 as in the present invention, Only consumers need to buy it, and there is no possibility of excessive quality.

Thirdly, the power transmission device 10 is composed of front and rear bevel gearboxes, one bevel gearbox is used for reverse rotation, and the other bevel gearbox is used to increase the speed in two stages, thereby concentrating important parts in the power transmission device 10. As a result, the tilling case and the milling case could be made into simple structures.

Fourthly, by changing the bevel gearbox equipped with a reversing device and the input and output sides at right angles,
A bevel gearbox that enables speed change is configured as a unit, and this is connected by a transmission shaft 37 and a space rod 38, which can be easily manufactured in length or short, so that power transmission devices 10 of various sizes can be easily manufactured depending on the model. In addition, various power transmission devices can be created by switching the PTO shaft side and the input side back and forth.

Therefore, it is possible to cope with the increasing variety of models of rotary tillers by easily changing the design of the unit at a low cost.

[Brief explanation of drawings]

Figure 1 is an overall side view of the rotary tilling device attached to the rear of the management machine, Figure 2 is a rear sectional view of the transmission case 1, Figure 3 is a side view of the same, and Figure 4 is a front view of the tiller case. , FIG. 5 is a rear sectional view of the tilling case, FIG. 6 is a partial sectional top view of the power transmission device, and FIG. 7 is a rear sectional view of the elastic fastener. 1... Travel transmission case, 12... Rotary tillage case, 10... Power transmission device, 10a
...Mission case side bevel gearbox, 1
0b...Bevel gear box on tillage case side, 37
...Transmission shaft, 38...Space rod, 40, 53...
...Bevel gear, 52...Clutch sliding body.

Claims (1)

[Scope of utility model registration request] PTO shaft 25a of traveling transmission case 1,
In the power transmission device 10 between the input shafts 33 of the tillage case 12, one side is a bevel gear box 10a which is a combination of bevel gears and further includes a reversing clutch device, and the other side is a bevel gear box 10a with a different number of teeth that is always in mesh, and the shafts are inserted therein. The spline holes should have the same diameter.
The bevel gearbox 10b enables speed change by being installed in place of the orthogonal input and output side shaft insertion portions, and both bevel gearboxes 10a and 10a.
10b, parallel space rod 38 and transmission shaft 37
A power transmission device for a rotary tillage device, characterized in that the power transmission device is connected to each other.