JPH0436566Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention relates to a rotary tiller connection structure.

(b) Conventional technology Conventionally, rotary tillers that are connected to agricultural tractors to perform tillage work have rotaries that rotate in only one direction, and cannot perform tillage work that rotates in both forward and reverse directions. Ta. In order to solve this problem, a method has been proposed in which a reversing switching mechanism is provided in the power transmission mechanism to the rotary to reverse the rotary, but in this method, the direction of the tiller claws installed on the rotary shaft and the direction of rotation are different. Since the tilling claws are in the opposite direction, it is necessary to replace the tilling claws.In order to further eliminate this drawback, a rotary tiller can be connected to the tractor by changing the front and rear positions of the device, thereby making it possible to replace the tilling claws. Unnecessary items (Japanese Unexamined Patent Publication No. 57-83202) and (Unexamined Japanese Patent Application No. 58-187101)
Publication No.) etc. were issued.

(c) Problems that the invention aims to solve However, in order to change the rotary tilling device back and forth, the device disclosed in JP-A No. 57-83202 requires a three-point link connecting the tractor and the device and a tail wheel support. The work required to attach and detach the frame is complicated, and the work to change the front and back is complicated.The structure of the one disclosed in JP-A-58-187101 also eliminates the need to attach and detach the three-point link, but the structure is complicated and the tail wheel support frame is complicated. In addition, the rotary tilling device is supported only by the vertical pivot installed in the tilling gear case of the device, which causes vibrations in the tilling section. The drawback is that it is easy to do.

(d) Means for solving the problem In this invention, the pivot plate is supported horizontally through the top link of the connecting member, and the tilling gear case of the rotary tilling section is rotated left and right through the vertical pivot inserted through the plate. It is movably supported and is connected to the left and right pipe frames connected to the left and right sides of the tilling gear case via the left and right lower links of the connecting member, and the depth frame supporting the tail wheel is connected to the rear of the pivot plate. It is an object of the present invention to provide a rotary tiller connection structure in which the rotary tiller can be connected to the rear of a tractor in a forward and backward manner.

(e) Effect With the above structure, when changing the rotary tilling section back and forth, there is no need to attach or detach the depth frame, and the rear end of the top link is attached to the upper pivot plate, and the rear end of the lower link is attached to the lower machine frame tube shaft. Since the upper and lower connecting parts have a large vertical width, vibration is less likely to occur.
Furthermore, since the direction of rotation of the tilling claws is reversed by the front-rearward transfer connection of the tilling section, both down-cut and up-cut tillage operations can be performed without replacing the tilling claws.

(f) Effects According to this invention, the rotary cultivating section is configured so that it can be connected back and forth as described above, making it easy to change the position of the device back and forth, as well as making it easy to operate. This has the effect of preventing vibration.

(G) Example The example of the present invention will be explained in detail based on the drawings.
A shows an agricultural tractor, in which power from a prime mover section 1 disposed at the front is transmitted to a transmission 4 via a clutch 2 and a housing 3, and left and right rear wheels disposed on the left and right sides of the transmission 4 are connected. 5, and also drives left and right wheels 7 via a propeller shaft 6 extending forward from the transmission 4, thereby forming a four-wheel drive tractor A.

At the rear of the tractor A, a rotary tiller B is provided with a top link 19 and left and right lower links 24, 24'.
The rotary tilling section B has a tilling gear case 8 disposed in the upper center of the tilling section B, and left and right pipe frames 9, 9' on the left and right sides of the case 8, respectively. A chain case 10 and a support plate 11 are integrally connected to the case 8 and are vertically installed at the left and right ends of the frames 9 and 9', respectively.
A tilling shaft 13 with a plurality of tilling claws 12 planted at the lower end of the tiller shaft 13.
The tilling shaft 13 is driven by a drive shaft 14 that is laterally supported and inserted through the left pipe frame 9, and a chain interlocking mechanism built into the chain case 10, thereby forming a side drive type tilling main body m. A vertical pivot 15 is provided upright on the upper surface 8-1 of the gear case 8,
A pivot plate 16 is pivotally supported in a substantially horizontal state via a coaxial shaft 15, and front and rear pivot parts 16-2 and 16-3 are respectively provided upright at the front and rear of the upper surface 16-1 of the plate 16, and the front pivot plate 16 is pivoted in a substantially horizontal state. A vertical support plate 18 is connected to the portion 16-2 via a connecting rod 17.
The rear pivot portion 16-3 supports the rear portion of the vertical support plate 18.
The rear end 19-1 of the top link 19 of the connecting member is pivotally attached to the front end 18-1 of the link 1.
The front end of 9 is pivotally connected to the rear end of a bracket 20 protruding from the rear of the transmission 4.

Further, at the rear of the pivot plate 16, a depth adjust frame 22 of the deep plowing adjustment mechanism n is attached via a mounting portion 21 protruding from the rear of the plate 16.
A tail wheel 22-1 hanging from the rear end is pivotally supported so that it can be moved up and down.

Note that 23 indicates a screw jack for raising and lowering the deep plowing adjustment mechanism n.

In addition, the left and right lower links 24, 24' of the connecting member
The front ends of 24-1 and 24'- are respectively pivotally connected to the lower left and right sides of the rear part of the transmission 4.
Reference numeral 1 denotes left and right lower link pivot plates 2 protruding from the front and rear sides of the left and right pipe frames 9 and 9', respectively.
5 and 25' via pivot pins 25-1 and 25'-1, respectively, and the same links 24 and 24'
The midway portions are interlocked and connected to the ends of left and right lift arms 27 via left and right lift rods 26, respectively, and the rotary tilling device B is configured to be moved up and down by the up and down rotation of the arms 27.

The rotary tilling section B is configured to have the same shape front and back including the main cover 28 above the tilling claws 12,
Even if the rotary tiller B is rotated about the vertical axis 15 and the front and rear positions of the tiller B are changed, the tractor A can be connected to the rear via the connecting member in the same manner as described above. During this changeover work, since the depth frame 22 is connected to the pivot plate 16, there is no need to change the depth frame 22. Note that 29 indicates a position fixing pin, and by replacing the pin 29, the direction of the rotary tiller B can be fixed in either the front or rear direction.

An input shaft 30 for introducing rotational power into the tillage gear case 8 is pivotally supported in the front-rear direction, and front and rear ends 30-1, 30- of the coaxial shaft 30
2 are the front and rear end surfaces 8- of the tilling gear case 8, respectively.
1 and 8-2, respectively, and a spline is formed on the same end portions 30-1 and 30-2, so that even if the front and rear positions of the rotary tiller B are changed and connected to the tractor A, Whichever of the front and rear ends 30-1 and 30-2 of the input shaft 30 is located forward is the PTO that protrudes from the rear surface of the transmission 4.
It can be interlocked and connected to the shaft 31 via an intermediate shaft 32.

Note that the intermediate shaft 32 is composed of two universal joints and a spline telescopic joint,
It is said to be able to bend and expand and contract while transmitting rotational power.

Furthermore, a front cover 33 and a rear cover 34 cover the front and rear sides of the tilling claws 12, respectively.
is fixed by a fulcrum crossing toggle mechanism E disposed on the front and rear edges of the main cover 28, so that it can be easily attached and detached. That is, horizontal fitting grooves 35 are formed on the lower surface of the rear edge of the front cover 33 and on the lower surface of the front edge of the rear cover 34, respectively, and protrusions protruding from the upper surface of the front and rear edges of the main cover 28 are formed in the grooves 35. The fitting portions of the covers 33 and 34 are pressed and fixed downward from above by a toggle mechanism E, which has front and rear pivot parts 37 and 38, and is attached to the main cover. A base 39 fixed to the upper surface of 28, a toggle arm 40, a toggle handle 41, and a toggle lever 4
Four-bar link mechanism consisting of 2 toggle handles 4
Rotate the rear end of 1 downward to attach the toggle arm 40.
When the pivot point 43 of the toggle handle 41 is positioned below the imaginary straight line S connecting the front pivot portion 37 of the base 39 and the pivot point 44 of the handle 41 and the lever 42, the elasticity of each member itself The press bolt 45 hanging from the rear end of the toggle lever 42 is urged downward to press the fitting portion downward, and the rear end of the toggle handle 41 is rotated upward to pivot the same. When the point 43 is positioned above the straight line S, the rear end of the lever 42 springs upward to release the downward pressure, making it easy to attach and detach the front and rear covers 33 and 34.

The pressing bolt 45 can be adjusted in its vertical position using a nut 45-1 screwed onto the bolt 45.

In the figure, 46 is a hanging angle adjustment plate of the rear cover 34, 47 is the hinge, 48 is a pipe for reinforcing the front edge of the main cover 28, and 49 is a side cover.

[Brief explanation of the drawing]

FIG. 1 is a side view (partially cut away) of the rotary tiller connection structure according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is an overall side view of the rotary tiller and tractor having the proposed structure. Figure 4 is an enlarged side view of the rear cover attachment part. A...tractor, B...rotary plowing section, 8...
...Plowing gear case, 9,9'...Left and right pipe frame, 15...Vertical pivot, 16...Pivot plate, 19...
...Top link, 22...Depth frame, 2
4,24'...Left and right lower links.

Claims (1)

[Scope of utility model registration request] Below the pivot plate 16 are a tilling gear case 8 that inputs power from the machine, a tilling claw 12 that is interlocked with the case 8 and performs tilling work, and left and right lower links 24, 24' that support these. The tilling main body m is connected through a vertical axis so that it can be rotated back and forth, and the rear end 19-1 of the top link 19, which is a connecting member with the main machine, is connected to the pivot plate 16, and the left and right lower links 2
4, 24, 24' rear ends 24-1, 24'-1 are respectively connected to the cultivating body m, and the pivot support plate 16 is provided with a deep plowing adjustment mechanism n. A rotary tiller connection structure configured to perform deep plowing adjustment of the tiller body m through the rotary tiller.