JPH052046Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a mower deck structure for a mower that is attached to a traveling vehicle and performs grass cutting work.

(Prior Art) A mower attached to the midsection or front part of a traveling vehicle such as a tractor is used to cut fallen grass while raising it up, and to efficiently discharge the cut grass to one side of the mower deck. A wind raising part is formed on the blade, and a rear guide plate for guiding the wind is provided inside the mower deck.

This rear guide plate is located in front of the back wall of the mower deck and forms the rear part of the cutting space inside the mower deck, and has a central wind guide section roughly along the center blade and a left and right wind guide section roughly along the left and right blades. It has left and right chevron-shaped portions that project forward and connect the respective wind guide portions.

(Problems to be Solved by the Invention) The rear guide plate is formed by bending a single plate, and the left and right chevron portions are protruding forward, so it is weak in strength and cannot be easily blocked by obstacles such as stones. It may easily deform when exposed to air, deforming each wind guide section, or impairing wind guide performance, mowing performance, etc.

(Means for Solving the Problems) The present invention provides the left and right chevron portions 25A of the rear guide plate 26,
By installing limit gauge wheel support plates 30, 30 between 25B and the back wall 27 behind it,
This is intended to solve the problems of the prior art.

That is, the specific configuration of the problem-solving means in the present invention is that the central blade 10A is placed in the cutting space 8 in the mower deck 7, and the left and right blades 10 on the rear side
B and 10C are arranged so as to be freely rotatable around the vertical axis, three sides of the reaping space 8 are closed with side walls to form a cut grass outlet 9 on one side, and a rear guide plate 26 is provided at the back of the reaping space 8. After this, the central wind guide section 2 has an arcuate surface 23A formed on the guide plate 26 approximately along the central blade 10A.
4A, left and right wind guide parts 24B, 24C forming arcuate surfaces 23B, 23C substantially along the left and right blades 10B, 10C, and each wind guide part 24A, 24B,
left and right chevron-shaped portions 25A and 25B are formed in a forward protruding shape to connect the rear guide plate 24C, and a back wall 27 is provided at the rear of the rear guide plate 26.
The mower has a mower decking structure in which a limit gauge wheel 29 is arranged between the mower 7 and the limit gauge wheel 29, and the limit gauge wheels 29 are provided in a pair on the left and right, and each of the limit gauge wheels 29 is provided on two supports fixed to a rear guide plate 26 and a back wall 27. It is noted that the front part of the support plate 30A, which is supported by the plates 30A and 30B and is located on the left and right outer side for the left and right limit gauge wheels 29, is connected to the top of the left and right chevron-shaped parts 25A and 25B of the rear guide plate 26. Features Mohr's moading structure.
At the point.

(Function) When an obstacle such as a stone hits the chevron portion 25 of the rear guide plate 26, the impact acts on the back wall 27 via the limit gauge wheel support plate 30 on the back, and thus the chevron portion 2
5 is prevented from being deformed by the back wall 27 via the support plate 30. There are two support plates 30 for each of the left and right limit gauge wheels 29, and one of the two plates is connected to the top of the chevron portion 25, particularly reinforcing the top.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In Figures 1 to 5, reference numeral 1 denotes a mid-mounted mower that is attached to the tractor body 2 via an attachment mechanism 3 so that it can be raised and lowered. while driving.

The mower deck 7 of the mower 1 forms a reaping space 8 whose lower and right sides are open.
The periphery of the blade except for the right grass discharge outlet 9 is closed by a side wall, and a central blade 10A and left and right blades 10B and 10C are arranged within the space.

A gear case 11 is provided to the right of the center in the left-right direction of the mower deck 7, and an input shaft 12 of this gear case 11 is connected to a power take-off shaft of the tractor body 2 via a universal joint shaft 13, and an output shaft is connected to the central vertical shaft. 14A, and a central blade 10A is attached to the lower part.

Left and right vertical shafts 14B and 14C are rotatably supported on the left and right rear sides of the central vertical shaft 14A of the mower deck 7, and left and right blades 10B and 10C are attached to the lower portions of the left and right vertical shafts 14B and 14C, respectively.
The three vertical axes 14A, 1 arranged triangularly in plan view
4B, 14C have pulleys 15A, 15B, 15C
are provided, all pulleys 15A, 15B, 15
A belt 16 is wound around C and tension is applied by a tension means 17, and the input shaft 12
power can be transmitted to three vertical shafts 14A, 14B, and 14C.

The pulley 15, belt 16, tension means 17, etc. are surrounded by a transmission cover 18 provided on the upper surface of the mower deck 7.

Ground wheels 19 that can adjust the cutting height are provided on both left and right sides of the front part of the mower deck 7, and limit gauge wheels 20A, 20B, and 20C that limit the height are provided in the center of the front part and on both left and right sides of the rear part. ing.

At the back of the reaping space 8 in the mower deck 7, there is a central wind guide plate 24A having an arcuate surface 23A approximately along the rotation locus of the outer end of the central blade 10A.
, left and right wind guide plates 24B, 24C forming arcuate surfaces 23B, 23C substantially along the rotation locus of the outer ends of the left and right blades 10B, 10C, and a central arcuate surface 23.
Left and right chevron-shaped portions 25A, 25 are formed in a forward protruding shape to connect each wind guide plate 24A, 24B, 24C in order to connect the left and right arcuate surfaces 23B, 23C with A.
B is provided.

The three wind guide plates 24 and the two chevron portions 25 are integrally formed by bending one band plate,
It constitutes a rear guide plate 26 of the reaping space 8. The rear guide plate 26 is formed separately from the mower deck 7, and the left and right wind guide portions 26 are formed on the back wall 27 of the mower deck 7.
4B and 24C, or by using the rear guide plate 26 itself as a mower deck back wall, the left and right wind guide parts 24
A separately formed reinforcing plate is welded between B and 24C.

A rear space 28 is formed between the rear wall 27 formed by the peripheral wall or reinforcing plate of the mower deck 7 itself and the rear guide plate 26 because the central blade 10A is located ahead of the left and right blades 10B and 10C. In this rear space 28, two central limit gauge wheels 29A and 29B are arranged.

Two central limit gauge wheels 29A, 29B are located behind the chevrons 25A, 25B and adjacent to each blade 10A, 10B, 10C.
That is, the center left limit gauge wheel 29A is aligned with the vertical axis 14A.
The distance to and the distance to the vertical axis 14B are approximately equal,
In addition, it is close to the wind guide parts 24A and 24B at the same time, and the distance between the middle right limit gauge wheel 29B and the vertical axis 14A is approximately equal to the distance between the vertical axis 14C.
Moreover, it is close to the wind guide sections 24A and 24C at the same time. The rear side of the chevron portion 25 is the position where the front and back width is the widest in the rear space 28 and where the two blades 10 can be approached at the same time.

Each limit gauge wheel 29 has two support plates 30.
A, 30B is supported via a shaft 31, and 2
The support plates 30A and 30B are installed on the back wall 27 and the rear guide plate 26 by welding.
As shown in FIGS. 1 and 2, the front end of the
is connected to the back surface of the top of the support plate 3 by welding to improve the strength of the chevron-shaped portion 25, especially at the top.
0B has reinforced central wind guide section 24A. The two sets of left and right support plates 30A and 30B have symmetrical shapes and can be the same. Note that without providing the support plate 30B, one shaft 31 is provided between the left and right support plates 30A, 30A.
It is also possible to provide one or two limit gauge wheels 29 on this one shaft.

Distance from the central vertical axis 14A to the central front limit gauge wheel 20A, left and right vertical axes 14B, 14C
From ground contact wheels 19A, 19B and rear gauge wheel 20
The distances to A and 20C are on the left and right vertical axes 14.
B, 14C to central limit gauge wheel 29A, 2
It is preferable to make the distance approximately equal to the distance to 9B.

The transmission cover 18 is divided into three parts in the left and right direction, and the left and right cover parts 18a and 18b are fixed to the mower deck 7 by welding or bolts, and the center cover 18c has a stopper 33 so that it can be attached or detached. It is installed.

The central cover part 18c covers the central part of the transmission system, such as the central vertical shaft 14A, its pulley, and tension means 17, and by removing this central cover part 18c, maintenance of the transmission system is possible. The rear part of the central cover part 18c is
It engages with the upper locking part 34, and the front part is stopped by a stopper 33 commonly called a shrimp metal fitting, so that it can be attached and detached with one touch.

The left and right cover parts 18a and 18b have an opening 35 on the outside.
(shown in FIG. 4), which improves ventilation inside the transmission cover 18 and enables cleaning and washing with water. A notch 36 for arranging the gear case 11 is formed in the right cover portion 18b.

(Effect of the invention) According to the invention detailed above, the front part of the support plate 30A located on the left and right outer sides of the left and right limit gauge wheels 29 is connected to the left and right chevron portions 25A, 25 of the rear guide plate 26.
Since it is connected to the top of B, the chevron portions 25A, 2
5B, the strength of the top part in particular can be improved, the top part that is easily hit by obstacles such as stones can be prevented from being deformed, the wind guidance performance of the rear guide plate 26 can be maintained well, and the two pieces of each of the left and right limit gauge wheels 29 can be improved. Support plate 30
A, 30B and these support plates 30A, 30
Since B is fixed to the rear guide plate 26 and the back wall 27, the limit gauge wheel 29 and the rear guide plate 26 can be strongly supported, and the limit gauge wheel 29
are provided in pairs on the left and right, and the left and right outer support plates 30
Since it is located inside the center blade 10A and approximately behind the left and right chevron portions 25A, 25B of the rear guide plate 26 that protrudes forward between the center blade 10A and the left and right blades 10B, 10C, there is only one limit gauge wheel 29. This makes it possible to make the limit gauge effect (soil scraping prevention effect, etc.) approximately the same for the three Grade 10 sheets arranged in a triangular arrangement.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is an overall plan view, Fig. 2 is a cross-sectional plan view of the main part, Fig. 3 is a cross-sectional view taken along the line - - of Fig. 1, and Fig. 4 is a view of the vehicle mounted on a tractor. A side view showing the state, and FIG. 5 is a plan view of the transmission cover. 1... Midmount mower, 7... Mower deck, 8... Reaping space, 9... Clipped grass discharge port, 10
...Blade, 14...Vertical axis, 19...Grounding wheel,
20... Limit gauge ring, 23... Arc surface, 2
4... Wind guide part, 25... Chevron part, 26... Rear guide plate, 27... Back wall, 28... Rear space, 29...
Limit gauge wheel, 30...Support plate.

Claims (1)

[Claims for Utility Model Registration] In the cutting space 8 in the mower deck 7, there is a central blade 10A, left and right blades 10B on the rear side thereof,
10C are arranged so as to be rotatable around the vertical axis, three sides of the cutting space 8 are closed with side walls to form a grass clippings outlet 9 on one side, a rear guide plate 26 is provided at the back of the cutting space 8, and after this A central wind guide section 24 in which a circular arc surface 23A substantially along the central blade 10A is formed on the guide plate 26.
A, and a left and right wind guide section 2 formed with arcuate surfaces 23B and 23C approximately along the left and right blades 10B and 10C.
4B, 24C, and each wind guide part 24A, 24B, 2
left and right chevron portions 25A, 25B formed in a forward protruding shape to connect the rear guide plate 2
A back wall 27 is provided at the rear of 6, and this back wall 27
The mower has a mower decking structure in which a limit gauge wheel 29 is disposed between the mower and the limit gauge wheel 29, and the limit gauge wheels 29 are provided in pairs on the left and right, each of which is connected to two support plates fixed to a rear guide plate 26 and a back wall 27. 30A, 30B, and the front part of the support plate 30A located on the left and right outer side for the left and right limit gauge wheels 29 is connected to the top of the left and right chevron-shaped parts 25A, 25B of the rear guide plate 26. Mohr's Mohr deck structure.