JPH0297320A - Reaper - Google Patents

Abstract

PURPOSE:To form an air flow without stagnation in a mower deck and smoothly discharge cut grass to the outside of the mower deck by forming an air inflow passage between an inner wall surface on the side of a discharge starting end and a leading guide. CONSTITUTION:Cut weeds, etc., are led to a discharge passage 20 in a mower deck 3 and discharged from a discharge port 21 to the outside of the mower deck 3 with a wind produced by cutting blades 4.... An air inflow passage 24 formed by the inner wall surface of the deck on the discharge starting end and part of a leading guide 22 is provided to facilitate inflow of air from the back of the mower deck and prevent the insufficient air required to discharge the cut grass in the mower deck.

Description

[Detailed description of the invention] [Industrial application fields] The present invention relates to a cutting device for cutting grass, weeds, etc.

[Prior Art] Conventionally, in this type of device, the outer periphery and upper part of the cutting blade attached to the lower part of the rotating vertical shaft are covered with a mower deck that is open only at the bottom, and the front part of the mower deck is used to store grass clippings. In order to remove the grass, a box-shaped grass discharge passageway was installed that was one step higher than the ceiling wall of the moadetsuki, and a wave-shaped guide was installed behind the cutting blade so as to approach the rotational trajectory of the cutting blade.

[Problems to be Solved by the Invention] However, in the case of the conventional device described above, the guide in the mower deck is simply fixed to the inner surface of the ceiling of the mower deck so as to be close to the cutting blade. However, when the cutting blade is rotating, the amount of air inside the mower deck is insufficient, and the grass clippings cannot be smoothly discharged from the discharge passage.

[Means for solving the problems] This invention is proposed in view of the above drawbacks, and includes:
For this reason, the following technical measures were taken. That is, a discharge passage 20 for discharging grass clippings to one side in the horizontal direction is provided at the front part of the mower deck 3 that covers a plurality of cutting blades 4 arranged side by side in the left and right directions.
is provided behind each cutting blade 4 in the mower blade 3,
A wave-shaped guide 22 follows the rotation locus of the cutting blade 4.
In the reaping device, the reaping device is characterized in that an air inflow passage 24 is formed between the inner wall surface of the mower deck 3 on the discharge start end side and the guide 22.

[Embodiments and Functions] The present invention will be described in detail below with reference to the drawings. 1 is a garden tractor mainly used for mowing work, 2 is a tractor 1, and a reaping device 3 attached to the lower part is a mower deck of the reaping device 2, which is open at the bottom and rear, and has three cutting blades 4...
It covers the lower part of the vertical shaft 5 to which the cutting blade 4 is attached and rotates.

A transmission box 7 is attached to an upper intermediate portion of the mower deck 3 and rotatably supports an input shaft 6 that projects forward. The rotational power taken out from the front part of the engine 10 mounted on the tractor 1 is transmitted to the lower PTO shaft 12 via appropriate transmission elements (pulleys, belts) in the transmission case 11, and the rotational power is transmitted to the lower PTO shaft 12 and the input shaft. 6 are interlocked and connected by universal joins 1 to 13, and the vertical shafts 5 mounted on the mower deck 3 are configured to be rotationally driven.

A pulley 14 is fixed to the middle part of the vertical shaft 5 mounted on the transmission box 7, and a belt is wound between this pulley 14 and a pulley 14.14 fixed to the other vertical shaft 5.5. turned,
The vertical axes 5... are all rotated in the same direction (clockwise in FIG. 2 in this embodiment). The cutting blade 4 has a band-like shape in plan view, and has a blade portion 1 at the front end on the rotation direction side at both left and right ends.
5. In addition, a cut grass discharge passage 20 is provided at the front of the mower deck 3, consisting of a front wall 16, a top wall 17, and a rear wall 18, for discharging cut grass, grass, etc., and this discharge passage 20 is opened from the rear. When you look at it, it looks like it's built one step higher than the ceiling wall of the main body of Moadetsuki 3. A discharge port 21 is provided on the right side of the cut grass discharge passage 20 to discharge the cut grass to the outside of the mower deck 3. Reference numeral 22 denotes a guide having a wave-shaped curve along the rotation locus of the cutting blades 4, and is provided so as to approach the rotation locus of the three cutting blades 4, as shown in FIG. Discharge passage 20
A passage 24 through which air can flow from behind the mower deck 3 is formed between the guide 22 on the starting end side and the inner wall surface of the mower deck 3.

In the figure, reference numerals 25..., 26... are gauge shafts for adjusting the cutting height attached to the front and rear of the mower deck 3, and 27 is a link mechanism for raising and lowering the mower deck 3, which operates a hydraulic device not shown. to raise and lower this.

On the upper side, when the rotational power of the engine 10 of the tractor 1 is transmitted to the input shaft 6 of the reaping device 2, each cutting blade 4 rotates clockwise. In this state, move the machine forward to cut grass, weeds, etc. The cut weeds, etc. are guided to the discharge passage 20 inside the mower deck 3, and are discharged from the mower deck 3 through the discharge passage 20 by the wind generated by the rotating cutting blades 4 through the outlet 21 on the lateral outer side. . At this time, an air inflow passage 24 formed by the inner wall surface of the deck 3 on the discharge start side and a part of the guide 22 is provided on one side of the mower deck 3, so air can easily flow in from behind the mower deck 3. The incoming air passes through the discharge passage 20 and is discharged from the discharge port 21, creating a flow of air that does not stagnate. can be discharged smoothly.

Note that if the tip of the guide 22 on the starting end side of the discharge passage 20 is extended along the curved surface of the mower deck 3 to the front side of the vertical shaft 5 on the discharge starting end side, the cut grass will be removed when the cutting blade 4 is rotating. pebbles and the like are less likely to scatter backward from the air inflow passage 24.

In addition, in this embodiment, the mowed grass, etc. is directly discharged from the mower deck 3, but a cylindrical chute (not shown) is connected to the discharge port 21 of the mower deck 3, and a grass collection bag attached to the rear of the machine is connected. It is also possible to collect grass clippings through this chute.

[Effects of the Invention] Since the present invention is configured as described above, it has the following technical effects. That is, a guide guide 22 having a waveform in plan view is provided along the rotation locus of the cutting blade 4, and an air inflow passage 24 is formed between the discharge start end side of the waveform guide 22 and the inner wall surface of the mower deck 3. Because there is, Moadetsuki 3
The cut grass, weeds, etc. can be quickly discharged to the outside of the mower deck 3 from the discharge passage 20 without running out of air necessary for discharging the grass clippings.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is an overall side view, FIG. 2 is a plan view, and FIG. 3 is a sectional view taken along the line A--A in FIG. 2. Code explanation Tractor mower blade discharge passage guide air inflow passage

Claims (1)

[Claims] 1) A discharge passage 20 for discharging grass clippings to one side in the horizontal direction is provided at the front of the mower deck 3 that covers a plurality of cutting blades 4 installed side by side in the left and right directions, and each cutting blade 4 in the mower deck 3 is In a reaping device in which a wave-shaped guide guide 22 is provided close to each other so as to follow the rotation locus of the cutting blades 4 at the rear, air is generated between the inner wall surface of the mower deck 3 on the discharge start end side and the guide guide 22. A reaping device characterized in that an inflow passage 24 is formed.