JPS646680Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a rotary mower for a tractor.
The main purpose of this product is to allow it to be used for mounting on the belly of a tractor or on either the front or rear of the tractor by attaching the power receiving case to the mower body, which is equipped with a cutting blade body that serves as the reaping section, in a replaceable manner. do.

Rotary mowers for tractors are categorized according to the type of attachment to the tractor: belly-mounted type, front-mounted type,
There is a rear mounting type, and even though the front mounting type and the rear mounting type can be used together,
It has been difficult to use the belly-mounted type in combination with ground clearance, PTO rotation speed, cutting width, etc.

Therefore, the present invention has been developed so that it can be used as a rotary mower for tractors for both abdominal mounting and front and rear mounting with slight structural improvements.
In the present invention, in a rotary mower for a tractor in which rotary power is transmitted from a power receiving shaft to a cutting blade body driven around a vertical axis via a gear transmission mechanism, the cutting blade body is mounted so as to be rotatable around the vertical axis. At the same time, a power receiving case for the abdomen of the tractor and a power receiving case that can be attached to either the front or rear of the tractor are each replaceably attached to the mower main body in which the input section for driving the cutting blade is built-in, and the mower body has a built-in input section for driving the cutting blade body. Each of the receiving cases is equipped with a power receiving shaft, a power output shaft, and a gear transmission mechanism that interlocks both shafts. A bending link mechanism for connection is attached to the power receiving case, and a connecting frame which can be attached to and detached from the elevating link mechanism is attached to the power receiving case which can be attached to either the front or rear of the tractor.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIGS. 1 to 5 show rotary mowers mounted on the belly of a tractor, and FIGS. 6 to 8 show rotary mowers mounted on the front or rear of a tractor. The structure of the mower main body 3, which is provided with an input section 2 that allows the blade body 1 to rotate around the vertical axis, is the same regardless of the mounting type, so this part will be explained first.

The mower main body 3 has a rectangular planar shape, and a transmission case 4 is formed on the longitudinal side thereof.

The transmission case 4 has a flat box-shaped cross section and is constructed by stacking a lower case 5 and an upper case 6 made of sheet metal and fastening them with bolts not shown.

The input section 2 is composed of a bevel gear transmission mechanism 7,
Annular seat body 8 fixed to the center of the lower surface of the lower case 5
The support body 9 on which the bevel gear transmission mechanism 7 is assembled as a unit is detachably attached using parallel pins 10 and bolts 11.

The cutting blade bodies 1 are disk-shaped in this example, and can be driven around a vertical axis via a bevel gear transmission mechanism 12, and in this example, four cutting blade bodies 1 are arranged in series in the horizontal direction.

By arranging the cutting blade bodies 1 in series in the lateral direction in this manner, the longitudinal width Y can be narrowed relative to the cutting width X, as shown in FIG. 3, which is advantageous when the cutting blade is worn on the abdomen.

That is, as shown in FIG. 5, when the cutting blade body 1 is driven by a belt, a so-called triangular arrangement is used to avoid contact between the blades. In this case, even if it is possible to overlap in the front and rear straight directions, there is a gap as shown by the symbol Z, and when cutting leaves in a curved direction, there will be uncut leaves, and the front and rear widths will have to become wider. .

The bevel gear transmission mechanism 12 is assembled together with the cutting blade body 1 as a unit on a support 13, and the support 13 is connected to an annular seat 14 which is fixed to the lower surface of the lower case 5 in parallel with a parallel pin 15 extending perpendicularly thereto. It is detachably attached with bolts 16.

The lateral bevel gear of the input section 2 and the lateral bevel gears of each bevel gear transmission mechanism 12 serving as the output section are interlocked and connected by a transmission shaft 17 that can be inserted into and removed from the lateral direction (horizontal direction). In this example, the transmission shaft 17 consists of three shafts and has a spline portion 17A.

An annular seat body 18 surrounding the input section 2 is fixed to the center of the upper surface of the upper case 6 of the mower main body 3, and an abdominal power source shown in FIG. 4 is attached to the annular seat body 18. The lower seat portion 19A of the receiving case 19 is also
The lower seat portions 20A of either the front or rear mounting power receiving case 20 shown in FIG. 8 are seated in a replaceable manner, and can be detached and fixed using vertical parallel pins 21 and bolts 22.

A power receiving shaft 23 having a spline portion is attached to the abdominal power receiving case 19 shown in FIG.
A power output shaft 25 in the vertical direction perpendicular to the shaft 25 is attached via a bearing 26, and both shafts 23 and 25 are interlocked via a gear transmission mechanism 27 shown as a bevel gear.

The lower spline portion 2 of the power output shaft 25
5A can be freely inserted into and removed from a fitting portion 2A formed on the bevel gear of the input portion 2.

A power receiving shaft 28 having a spline portion is attached to the power receiving case 20 for front or rear mounting shown in FIG. Rotational power can be transmitted via a one-way clutch 32 to a bevel gear 31 attached thereto. Further, the power output shaft 33 is mounted vertically orthogonally to the receiving shaft 28 via a bearing 34, and is interlocked via a gear transmission mechanism 36 consisting of a bevel gear 35 meshing with the bevel gear 31.

In this example, the gear transmission mechanism 36 is speed-increasing, whereas the gear transmission mechanism 27 in FIG. The former is low and the latter is high.

Note that the lower spline portion 33 of the power output shaft 33
A can be freely inserted into and removed from the fitting portion 2A.

As shown in FIGS. 1 and 2, a refraction link mechanism 37 having four parallel links is attached to the abdomen-mounted power receiving case 19.
A pin 39 whose upper end can be inserted into and removed from the abdomen of the vehicle body 38
It can be pivoted.

On the other hand, as shown in FIGS. 6 and 7, the front or rear power receiving case 20 has a pair of left and right brackets 40 protruding from both side walls, and a top mast 41 is erected in the center in an inclined manner. Left and right bracket 4
0 and the top mast 41 are connected and fixed by a support link 42, and here an elevating link mechanism 44, which is a three-point link mechanism in this example, is attached to the tractor T.
A connecting frame 43 is attached that allows the belt to be attached freely.

In addition, in FIG. 1, 45 is a front wheel, 46 is a rear wheel, 47 is a lift arm, and 48 is a PTO shaft.

When worn on the abdomen, a removable deceleration transmission mechanism 49 is attached to the PTO shaft 48, and the transmission mechanism 49
and the power receiving shaft 23 are connected to a transmission shaft 50 with a universal joint.
The wire rope 5 connects the pair of left and right lift arms 47 and the power receiving case 19.
They are connected in the first place.

On the other hand, in case of front mounting or rear mounting, the connecting frame 43
A lifting link mechanism 44 is attached to the shaft, and the PTO shaft 48 and the power receiving shaft 28 are connected by a transmission shaft with a universal joint.

Additionally, in FIG. 7, 52 indicates a pair of left and right steering wheels, and 53 indicates a limit gauge wheel.

Next, the reaping work will be explained.

In the case of the abdominal type shown in FIGS. 1 to 4, the rotary mower is inserted between the front wheel 45 and the rear wheel 46, and the upper end of the bending link mechanism 37 is pivoted to the vehicle body 38 with a pin 39. In this example, a wire rope 51 is attached to the tractor T so that it can be raised and lowered around the longitudinal axis in the traveling direction, and has a vertical positioning mechanism (not shown) between the power receiving case 19 and the pair of left and right lift arms 47 via a guide sheave or the like. and connect them,
The reduction transmission mechanism 49 and the power receiving shaft 23 are connected to the transmission shaft 5.
Link with 0.

In this state, normally the tractor T is moved forward,
When the PTO shaft 48 is driven, the gear transmission mechanism 27
In this example, the four cutting blade bodies 1 are rotated around the vertical axis through the gear transmission mechanism 7 and gear transmission mechanism 12 of the input section 2, and the swing cutter 1A cuts the lawn at a predetermined cutting height. , weeds, etc. will be harvested.

At this time, since the cutting blade bodies 1 are arranged side by side in series in the lateral direction, not only can the longitudinal width Y be shortened with respect to the cutting width Therefore, the mower main body 3 is connected to the vehicle body 38 by the bending link mechanism 37.
Since it is attached to the ground, it can be made to follow the unevenness of the ground.

Next, when carrying out reaping work by attaching the rotary mower to the front or rear part of the tractor T, the bolt 22 is loosened, the power receiving case 19 is removed from the annular seat body 18, and the power receiving case 19 is removed from the annular seat body 18. The case 20 is mounted on the annular seat 18 of the mower main body 3 using bolts 22 while being positioned using parallel pins 21.

That is, the power output shaft 33 is connected to the fitting part 2A of the input part 2.
is inserted, and the bolts 22 are attached while performing so-called centering.

When the power receiving case 20 is replaced in this way, since the connecting frame 43 is attached to the case 20, it is attached to the tractor T so that it can be raised and lowered by the lifting link mechanism 44, and the PTO shaft 48
It is only necessary to interlock and connect the power receiving shaft 28 with the power receiving shaft 28 through a transmission shaft, and the reaping operation is performed in the same manner as described above.

This invention is carried out as described above,
In short, the present invention is a rotary mower for a tractor in which rotational power from a power receiving shaft is transmitted to a cutting blade body driven around a vertical axis via a gear transmission mechanism, in which the cutting blade body 1 is rotatable around the vertical axis. The mower body 3 is attached to the mower body 3 in which the input section 2 for driving the cutting blade body 1 is built-in, and a power receiving case 19 for being mounted on the abdomen of a tractor and a power receiving case 20 that can be attached to either the front or rear of the tractor are respectively provided. Gear transmission mechanisms 27 and 36 that are replaceably attached to each of the power receiving cases 19 and 20 and that interlock the power receiving shafts 23 and 28, the power output shafts 25 and 33, and both shafts 23, 28, 25 and 33 are provided. The respective power output shafts 25 and 33 are connected to the input section 2 so as to be inserted into and removed from the input section 2, and a connecting bending link mechanism 37 is attached to the power receiving case 19 for the tractor's abdomen. The power receiving case 20, which can be attached to any of the above, is characterized in that a connecting frame 43 is attached to the elevating link mechanism 44 and is detachable, so that it has the following advantages.

The power output shafts 25 and 33 of the abdomen-mounted power receiving case 19 and the front- and rear-mounted power receiving cases 20 can be inserted into and removed from the mower main body 3 in which the input section 2 for driving the cutting blade body 1 is built-in. Since the mower main body 3 side is used as is and the power receiving cases 19 and 20 are replaced, it is possible to select either abdominal mounting or front/rear mounting.

Furthermore, when making a selection, the power receiving cases 19 and 20 can be built with the gear transmission mechanisms 27 and 36, etc., respectively, while the mower main body 3 remains as it is, and these can be handled as one unit. Due to selective replacement, gear engagement is unlikely to go out of order, and each case 19, 20 is equipped with a bending link mechanism 37 and a connecting frame 43, so whether it is worn on the abdomen or front or rear mounted. Replacing it is extremely easy.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall side view of a tractor belly-mounted type, Fig. 2 is a rear view thereof, Fig. 3 is a schematic plan view thereof, and Fig. 4 is a cutaway view of its main parts. Fig. 5 is a plan view showing a comparative example of Fig. 3, Fig. 6 is a side view of the main part of the rear or front mount type, Fig. 7 is a plan view thereof, and Fig. 8 is a plan view of the main part. It is a partially exploded front view. 1... Cutting blade body, 2... Input section, 3... Mower body, 19, 20... Power receiving case, 23, 28
...Power receiving shaft, 25, 33...Power output shaft, 2
7, 36...Gear transmission mechanism, 37...Bending link mechanism, 43...Connection frame.

Claims (1)

[Scope of utility model registration request] In a rotary mower for a tractor in which rotational power from a power receiving shaft is transmitted to a cutting blade body driven around a vertical axis via a gear transmission mechanism, a cutting blade body 1 is rotatably mounted around the vertical axis. At the same time, the mower main body 3 in which the input section 2 for driving the cutting blade body 1 is built-in is equipped with a power receiving case 19 for the abdomen of the tractor.
and a power receiving case 20 that can be attached to either the front or rear of the tractor are each replaceably attached, and each of the power receiving cases 19, 20 has a power receiving shaft 23, 28, a power output shaft 25, 33, and both shafts 23. , 28, 25, 33 are provided, and the respective power output shafts 25, 33 are connected to the input portion 2 so as to be freely inserted into and removed from the input portion 2. A tractor characterized in that a connecting bending link mechanism 37 is attached to the case 19, and a connecting frame 43 that is detachable to the elevating link mechanism 44 is attached to the power receiving case 20, which can be attached to either the front or rear of the tractor. Rotary mower for.