JPS6119614Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mid-mount type rotary mower device that is attached to the abdomen between the front wheels and the rear wheels of an agricultural tractor.

A rotary mower is a mowing device for mowing pastures, mowing lawns, etc., and is often attached to the abdomen of an agricultural tractor. Various mounting methods have been used in the past, but the drive force extraction part is the PTO shaft at the rear of the transmission case,
Front held by front axle bracket
Since there are only two locations, the PTO pulley, the V-belt must be used to drive the vehicle from that location, and improvements have been made to support methods for the V-belt and pulley.

Furthermore, various methods have been devised to lift the tractor from the ground surface when not in use, depending on the relationship with the driving V-belt and the belly of the agricultural tractor.

The present invention is a device that particularly facilitates attachment and detachment of a rotary mower to the abdomen of an agricultural tractor.

The abdomen of an agricultural tractor is a narrow space, and it is necessary to work in an unstable position to place the rotary mower in this area.Furthermore, it is difficult to lift the rotary mower device and attach it to the abdomen of the agricultural tractor. It is a labor-intensive job.

Conventionally, as in the technology described in Japanese Utility Model Application Publication No. 50-2837, a connection part between a rotary mower support device and the machine body is made up of parallel links, and a connection part between the rotary mower lifting device and the machine body is made up of a wire. were pivotally connected by at least three simple pins, so after inserting the pins, it was necessary to go to the back side of the tractor and insert a pine needle pin etc. from the back side in order to prevent the pins from coming off. It is.

In the present invention, the bracket provided on the abdomen of the agricultural tractor is configured so that it can be easily attached and removed from one side of the agricultural tractor using J-shaped pins 37 and 42, without having to go to the back side each time. It is well constructed.

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 a diagram showing a mid-mount type rotary mower installed on the abdomen of an agricultural tractor.

An engine 2 is disposed inside a bonnet 1, and a front axle bracket 3 protrudes forward from the lower side surface of the engine 2. A front wheel differential device 14 is supported on the front axle bracket 3 via a center pin, and a front wheel drive shaft 15 is inserted into the front wheel differential device from the transmission case 6.
Front axles project from the front wheel differential device 14 to the left and right, and the front wheels 4 are supported at the ends of the front axles. A clutch housing 5 is fixed to the rear surface of the engine 2, and a transmission case 6 is further fixed to the rear surface of the clutch housing 5. The mounting device of the mid-mount type rotary mower of the present invention is mounted on the front axle bracket 3 at the front and the clutch housing 5 at the rear, and the power is transmitted from the front motor stored inside the front axle bracket 3.
Obtained from PTO pulley 21.

The conventional mid-mounted rotary mower is
Power was extracted from the PTO shaft 9 at the rear of the transmission case using a special pulley and gear box, but this was difficult to install and difficult to hang with the belt, so this idea was improved. .

Rear axle housings are provided on both sides of the transmission case 6, and rear wheels 7, 7 are supported on the rear axle housings.

A hydraulic case 10 is provided on the upper surface of the transmission case 6, and a seat 11 is further provided above the hydraulic case 10.
8 is a three-point link type work machine mounting device, and 12 is a steering handle.

FIG. 2 is a side sectional view showing the power take-off part, FIG. 3 is a front view of the power take-off part, and FIG. 4 is a plan sectional view.

The rotation speed of the engine placed inside the bonnet 1 is taken out by the clutch shaft and
A PTO shaft 20 is used, and a front PTO pulley 21 is constantly rotated between the front axle bracket 3.

V pulleys 23 and 24 are provided to extract power for horizontal rotation from the front PTO pulley 21, and the V belt 19 is twisted at right angles.

A bracket 31 is fixedly attached to the front axle bracket 3, mounting pins 28, 29, and 30 of the belt cover 13 are taken out from the bracket 31, and the belt cover 13 is inserted into these mounting pins and fixed with fixing screws 32. . Similarly, protrude the mounting bracket 25 of the pulley 23 from the bracket 31,
A bracket 26b is pivotally supported on the other mounting bracket 26a, and the V-pulley 24 also serves as a tension pulley. The V pulley 24 is always pressed against the V belt 19 by the spring 33a. 33 is a spring adjustment screw.

27 is a belt guide rod.

FIG. 5 is a drawing showing a support device for a rotary mower. FIG. 6 is a plan view of the support device.

The brackets 16, 16 are fixed to the front axle bracket 3, and the brackets 17, 17 are fixed to the sides of the clutch housing 5.

The brackets 16 and 17 are permanently fixed on the tractor side, and J-shaped pins 37 and 42 are provided to enable the rotary mower to be removed. By doing so, the rotary mower can be removed.

A lifting lever 34, a lever guide 51, a lever shaft 56, and a lever arm 36 are integrally fixed on the bracket 16 side, and the lifting lever 34 is moved into the groove 51a of the lever guide 51 by pushing the operation pin 35.
By rotatably rotating the lever shaft 5
6, the lever arm 36 can be rotated up and down. An engaging portion for fixing the rotary mower in the raised state is provided at the rear end of the groove 51.

Insert the long side of the J-shaped pin 37 into the hole 36b of the lever arm 36, insert the short side of the J-shaped pin 37 into the hole 36a, and insert the pine needle pin into the hole 37a of the long side of the J-shaped pin. Insert it into the lever arm 36,
The spring 37c is inserted and the pine needle pin is inserted into the hole 37b again. With this structure, J-shaped pin 3
7 is always attracted to the lever arm 36.

The arc portion of the J-shaped pin 37 serves as a handle,
Holding this part, pull out the short rod of the J-shaped pin, and insert the long hole part of the arm 76 into the lever arms 36, 3.
6 and insert the short J-shaped pin into hole 36 again.
The arm 76 portion can be connected by inserting it into a.

The links 45, 45 and the base 54 of the turnbuckle 39 are connected to the bracket 17 by connecting the front end to the engagement cam 75, centering around a pivot pin 43c in which the binding fitting 43 is loosely fitted into the hole 17e of the bracket 17.
By engaging and disengaging from a, the link 44,
The shafts 53 and 52 fixedly attached to the bracket 44 are released from the binding state between the binding fitting 43 and the bracket 17, and the connection is released. This operation is
The camshaft 75 is engaged with the long hole 75c by the pin 42e and is configured to be slidable, so the short rod 42c is pulled out from the hole 17f of the bracket 17 against the spring 42d.
By rotating the J-shaped pin 42 inside, the cam shaft 75 and the engagement cam 75a are rotated via the pin 42e, and the engagement cam 7 is rotated from the tip of the tying fitting 43.
5a comes off. As a result, the tying fitting 43 opens around the pivot pin 43c, and the shafts 52, 53, which were positioned by the reinforcing plates 17a, 43a shown in FIGS. 13 and 16 and held in the recesses 17d, 43d, are freed. Ru.

A pin 42e is inserted and fixed into the J-shaped pin 42 shown in FIG. 12, and a fixing pin of a spring 42d is inserted into the hole 42b.

A clutch pedal mounting portion is fitted into the recess 17a of the bracket portion 17 shown in FIG. 17c,
43b is a reinforcing plate.

As shown in FIGS. 24 and 25, metal fittings 53a and 53b are fixed to the shaft 53 for positioning the brackets 17, 17 and the fitting fitting 43 so that they cannot be moved from side to side. It is set up.

Furthermore, the base portion 54 of the turnbuckle 39 is also loosely fitted.

The rotary mower device is supported on the bracket 17 by a parallel four-point link device with four integrally formed links of turnbuckles 39, links 44, links 45, and brackets 49 and 50, and the upper and lower portions of the four-point link devices are is performed by rotating the lift lever 34.

Furthermore, an elongated hole 76a is opened on the arm 76 side at the short rod connection between the arm 76 and the J-shaped pin 37 of the lever arm 36.
In addition to being lifted up and down by the rotary mower, when a stone or the like is caught in the lower part of the rotary mower, it can be freely lifted up by the length of the elongated hole 76a.

The turnbuckle device 39 consists of a rotating grip portion 40, a fixing nut 41, a base portion 54, etc., and by adjusting these, the quadrilateral shape of the four-point link device can be changed and the angle of the rotary mower with respect to the ground surface can be adjusted.

FIGS. 7 to 11 are drawings of the rotary mower device.

Three booleys 46, 58, 60 are arranged on the cover 18 of the rotary mower device,
A V-belt 57 is suspended through a tension pulley 59. The pulley 46 is a double pulley, and the drive V-belt 19 is suspended on the upper stage, and the V-belt 57 is suspended on the lower stage.

A rotary blade 67 is attached to the lower end of the shaft of each pulley.
68, 69 are fixed, and the rotary blades 67, 68, 69 rotate in the same direction.

The cut grass is then discharged from the discharge port 64 to the outside of the track of the tractor. The discharge port 64 is the first
As shown in FIG. 1, the handle 56 is adjusted to the position 64 in FIG. 11.

A pulley cover 73 covers the V belt 57 and the V pulleys 58 and 60.

47, 48 are rollers for keeping the minimum distance between the rotary blades 67, 68, 69 so that they do not come into contact with the ground, and the tail wheels 61, 61 are the tail wheel levers 63.
This is a device for adjusting the height of cutting from other surfaces by adjusting the height. The lock pin 63a engages with the engagement groove 62a of the lever guide 62 to lock the positions of the tail wheels 61, 61.

The lock pin 63a is always held in an engaged state by a spring 63b. 71 is an arm of the tension pulley 59.

As described above, the present invention has a configuration in which a rotary mower is attached to the abdomen of an agricultural tractor, in which the rotary mower and the rotary mower lifting device are connected by a single pin, and the rotary mower support device is fixed to the tractor side. This is done by one pin, and the two pins have a J-shaped locking part at one end that locks the movement of the pin, and springs 37c and 42 that lock the J-shaped locking part.
The J-type pins 37, 42 are interposed with
Since it is possible to lock the lock, the following effects can be achieved.

In other words, conventional mid-mount mower attachment devices always use three or more simple pins on the left, right, front, back, etc., so when attaching or detaching the tractor, the operator must look under the tractor and lock the pins. First, it was necessary to remove the pine needle pin that was in place, and then gradually remove the left and right pins one by one. It was also necessary to insert and remove the pin from both sides of the tractor.

On the other hand, in the case of the present invention, the rotary mower is connected to the abdomen of the tractor using only two pins, which saves time and effort.Furthermore, since the pins are configured as J-shaped pins, the rotary mower is connected to the abdomen of the tractor using only two pins. You can attach, detach, and lock the device from the front side without having to go around.

[Brief explanation of the drawing]

Figure 1 is a side view of a rotary mower installed on an agricultural tractor, Figure 2 is a side cross-section showing the power take-off part, Figure 3 is a front view of the power take-off part, and Figure 4 is a plan sectional view of the same. FIG. 5 is a side view showing the mounting device of the rotary mower, FIG. 6 is a plan view of the same, and FIG. 7 is a plan view of the rotary mower device.
Fig. 8 is a side sectional view, Fig. 9 is a drawing showing the tension pulley 59 section, Fig. 10 is a rear view of the rotary mower device, Fig. 11 is a drawing showing the discharge port part, Fig. 12 is a drawing showing the J-shaped pin 42 drawings, Figure 13,
14 and 15 are drawings of the bracket 15, FIGS. 16 and 17 are drawings of the tying fitting 43,
Figure 18 is a drawing of the J-shaped pin 37, Figure 19,
Figure 0 is a plan view, a side view, and a 21st view of the lever shaft 56.
Figures 22 and 23 are drawings of the arm 76, Figures 24 and 25 are plan views and side views of the shafts 52 and 53 link 44, and Figures 26 and 27 are the cam shaft 7.
5 is a rear sectional view and a side view of the vehicle. 16, 17...Bracket, 18...Rotary mower device cover, 21...Front PTO pulley, 34...Elevating lever, 37, 42...J
shaped connecting pin, 39... turnbuckle, 44,
45... Link, 43... Binding metal fittings.

Claims (1)

[Scope of utility model registration request] In a configuration in which a rotary mower is attached to the abdomen of an agricultural tractor, the rotary mower and the rotary mower lifting device are connected by one pin, and the rotary mower support device is fixed to the tractor by one pin, and the rotary mower and the rotary mower lifting device are connected by one pin. A J-shaped pin 3 has a J-shaped locking portion at one end that locks the pin from moving, and springs 37c and 42d that bias the J-shaped locking portion into a locked state.
A mounting device for a rotary mower in an agricultural tractor, characterized in that the device is configured to have a structure of 7 and 42, and that the agricultural tractor side and the rotary mower side can be attached and detached from one side of the tractor, and that the J-shaped pins 37 and 42 can be locked. .