JPH04200312A - grass cutting equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mowing device that is used in conjunction with a self-propelled machine such as a mower or a tractor. It is equipped with a flail mower type cutting blade and a cover that covers the cutting blade from above.
A mowing space for taking in and cutting the planted grass, a lifting space for guiding and transporting the cut grass cut in this mowing space, a descending space for guiding and descending the transported cut grass, The present invention also relates to a grass mowing device each having a discharge space for dispersing and discharging the grass clippings that are being conveyed downward onto the ground after cutting.

[Conventional technology]

This type of mowing device has a left and right axis (9
) The cutting blade (8) that rotates around the cutting blade (8) is generally driven and rotated so that the front portion of the cutting blade (8) in the direction of movement thereof moves upward, which is a so-called up-cut drive.

The grass clippings are lifted and moved by the discharge force generated by the rotation of the cutting blade and the rotating wind generated by the rotation. ) to prevent the grass clippings from falling as much as possible.
), and the mower's moving path forms a descending space (S3) that follows the lifting space (S2) and communicates with a relatively large discharge space (S4). The shape of the cover (11) was set so that it was formed in a shape that gradually widened.

[Invention or problem to be solved]

By the way, there is a desire to improve the efficiency of mowing work by making the mowing device function when the machine is moving forward or backward, but the above mowing device is designed so that the mowing function only occurs when the machine moves in one direction. Since the cover is constructed by setting a space, the above request cannot be met as it is.

In other words, when the rotating shaft is reversely rotated so that the discharge space is in the front, the opening area at the lower end of the downwardly spreading downward space, which takes in the grass clippings, is too wide and does not function well. The feeding space is too narrow, and it becomes impossible to move the material downward.

An object of the present invention is to provide a mowing device that can perform a sufficient mowing function regardless of whether the mowing device moves forward or backward.

[Means to solve the problem]

For the above purpose, the present invention provides the mowing device described at the beginning, in which the lifting space is formed into a deep narrow shape in a state where a conveying function for receiving the grass clippings from the cutting space and lifting it upward is created. The space is formed in a shape that gradually widens toward the discharge space along its path, and each of the reaping space and the discharge space, and the lifting space and the descending space have a symmetrical shape with respect to a perpendicular line passing through the axis of the rotation axis. The characteristic configuration is that the shape of the cover is set so as to be formed.

Then, both ends of the cover that form the reaping space and the discharge space are moved upwardly around the pivot axis along the axis of the rotating shaft with respect to the cover body that forms the lifting space and the descending space. It is advantageous to configure the structure so that it can be pivoted.

In addition, an elevating mechanism is provided that can drive and swing both ends of the cover upward in a contradictory manner, and as the rotating shaft is driven in one direction, one end swings upward and moves in the other direction of the rotating shaft. one end of the other cover is swung upward as the driving rotation of the
It is more convenient if the rotating shaft drive device and the lifting mechanism are linked, and furthermore, both ends are connected to a horizontal horizontal wall part continuing to the cover body and an up-down vertical wall connected to this. In addition, the vertical wall may be made of a flexible plate material.

[For production]

According to the configuration of claim 1, when the mowing device is advanced toward the discharge space by reversing the rotating shaft, the mowing device is narrowed at the back in a state where a conveying function of receiving grass clippings from the mowing space and transporting them upward is generated. The formed lifting space has a shape that widens at the front (corresponding to the descending space), and can perform a function suitable for descending the grass clippings. The space has a shape (equivalent to a lifting space), and can perform the function of taking in and lifting grass clippings.

Since the cover is configured to have a shape that makes the lifting space and the descending space symmetrical with respect to the perpendicular line passing through the axis of the rotating shaft, the lifting space and the descending space will remain the same regardless of which direction the mowing device moves. It becomes possible to generate the lifting function and the descending transfer function in the same state.

In other words, we have realized a dual-use structure that can adequately perform both of the above-mentioned functions for the rain space, which has conflicting properties: a relatively narrow and desirable lifting space and a relatively wide and desirable descending space. .

Furthermore, regarding the reaping space and the discharge space, both of which are relatively large spaces, the covers are constructed in a shape that is symmetrical with respect to the perpendicular line passing through the axis of the rotating shaft. It becomes possible to generate the function of taking in and cutting grass and the function of diffusing and releasing cut grass in the same state.

Therefore, the function of the cover can be performed in the same way in both forward and backward directions without any problems.

In the structure of claim 2, by upwardly swinging the end on the front side in the direction of movement, the lower end of the end comes into contact with the planted grass and tends to fall over. It is possible to reduce the negative impact caused by grass, and it is also easy to deal with mowing long grass.

In the third aspect of the present invention, the long rod handling work is automatically performed by driving the cutting blade in reverse rotation when the direction of movement is changed.

In the structure of claim 4, since the vertical wall following the horizontal wall is flexible, the rise and fall situation of the end of the cover does not affect the planting condition, such as contact with the planted grass and causing it to fall down. can be reduced regardless of

〔Effect of the invention〕

The mowing device according to claim 1 is a useful device that can perform a normal mowing function under the same conditions regardless of whether the machine moves forward or backward, by devising a cover shape obtained by studying and examining the mowing release phenomenon. I was able to provide it.

In addition to the above-mentioned effects, the mowing device according to claim 2 can improve the mowing condition of the grass, and the mowing device according to claim 3 can improve the mowing condition of the grass. and 2. In addition to the effect of claim 4, the operation of changing the rotation of the mowing device due to reversal of the direction of movement can be easily and reliably performed without making a mistake of setting the end on the raising side. In addition to the effects of claims 1.2 and 3, the grass mowing device described above has the advantage of improving the grass cutting condition.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 3 shows a radio-controlled mower that is operated by remote control using a radio. This mower is a flail mower type mowing device (
3) are installed in series, and a pair of left and right crawler traveling devices (4),
A diesel engine (5) is disposed at the rear of the fuselage (1) equipped with (4), a fuel tank (6) is disposed at the front pressure, and a control device (7) is disposed at the front cloth.

In this mower, the crawler traveling device (4), (4)
The hydrostatic continuously variable transmission that drives the machine and the mowing device (3)
It is constructed as a fully hydraulically driven system in which the driving PTO pump and the like are directly driven by the crankshaft of the engine (5).

As shown in FIGS. 1 and 2, the mowing device (3) has a pair of left and right side plates (10) that support the rotation shaft (9) of the cutting blade (8).
), (10) are connected to each other by a cover (11).

A sled body (14) consisting of an upward U-shaped pipe (12) and a plate material (13) fixed to the left and right side plates (10) and (10), respectively, is attached so that its lower edge is the cutting blade (8). Rotation trajectory (L
) and bolted to the lower position. A drive device (A) for the cutting blade (8) is attached to the protrusion (10a) of the left side plate (10). That is, the rotation axis (9)
The drive shaft (15) is provided with a left-right transmission shaft (15) that is linked to a belt (16), and a drive shaft (18) of a hydraulic motor (17) that is a front-rear shaft is linked to a bevel gear to form a drive device. (
A) and its casing (19) as a protrusion (10
It is bolted to a). Note that (20) is a belt cover.

The cover (11) includes a downwardly facing, substantially arc-shaped cover body (21), horizontal walls (22) connected to each of the front and rear ends of the cover body (21),
(22) and rubber sag (corresponding to the vertical wall) (23), (2
3), and a pair of front and rear reinforcing plates (24), (24).

This cover (11) is designed to take in and cut planted grass between the rotation locus (L) of the cutting blade (8) when viewed in the axial direction of the rotation shaft (9) and the inner surface of the cover (11). A reaping space (S1), a lifting space (S2) for guiding and transporting the cut grass cut in the reaping space (S1), and a descending space (S3) for guiding and transporting the cut grass being lifted up. ),
and a discharge space (S4) for dispersing and discharging the grass clippings descending onto the ground after cutting.

Further, the lifting space (S2) is formed in a narrow shape so that a conveying function of receiving the grass clippings from the cutting space (S1) and lifting it upward is formed, and the descending space (S3) is formed so that its path is narrow. It is formed in a shape that gradually widens toward the discharge space (S4), and also includes a reaping space (S1), a discharge space (S4), a lifting space (S2), and a descending space (S3).
The shape of the cover (11) is set to be symmetrical in the front and back so that each of the cover (11) has a symmetrical shape with respect to a perpendicular line (X) passing through the axis (P1) of the rotating shaft.

In addition, mounting plates (25), (25) are fixed to two places in the middle part in the left and right direction of the cover (11), and a top mast (27) for pivoting the top link (26), and a link mechanism (2). The connection part with the lower link (28) is installed. In addition, the axis (P1) of the rotating shaft and the side wall (22).

The vertical length (b) between (22) and the longitudinal length (a) between the rotation locus (L) and the rubber sag (23) and (23) are largely due to the grass clippings getting caught in the rotating shaft. Reduces horsepower loss.

With the above configuration, the mowing device (3) can exhibit excellent mowing performance under the same conditions regardless of whether the body (1) is moving forward or backward.

[Another example]

The mowing device (3) shown in FIG. 4 may also be used. That is, the front and rear horizontal walls (22) are connected to the cover main body (21) which is reinforced with a pair of front and rear square pipes (29), (29).

(22) The opening/closing covers (34) and (34) are configured so that they can swing up and down around the left and right axis (P2), respectively. The opening/closing covers (34), (34) are moved from the horizontal release position determined by the stopper (31) to the take-in position by a lifting mechanism (B) using a double-rod type hydraulic cylinder (30). It is driven up and down.

Then, the control valve of the hydraulic cylinder (30) is connected to the hydraulic motor (
It is configured to be operated in conjunction with the control valve 17), and when the rotating shaft (9) rotates in the direction of arrow (a), the front opening/closing cover (34) rises and the rotating shaft (9) moves forward. Arrow (
When moving backwards in the direction of
and the elevating mechanism (B) are linked to each other.

It would be convenient if the front and rear opening/closing covers (34) were raised and lowered in a reverse manner using separate hydraulic cylinders, and the rising angle could be changed and set as desired.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings by the reference numerals.

[Brief explanation of the drawing]

The drawings show an embodiment of the mowing device according to the present invention, FIG. 1 is a partially cutaway side view of the device, FIG. 2 is a partially cutaway plan view of the device, and FIG. 3 is an overall side view of the mower. 4 is a partially cutaway side view of the device in which the cover is openable at one end, and FIG. 5 is a sectional side view showing a conventional example of the cover shape. (8)...Mowing blade, (9)...Rotating shaft,
(I1)...Cover, (21)...Cover body, (22)...Side wall, (23)...
... Vertical wall, (34) ... End, (A) ...
... Drive device, (B) ... Lifting mechanism, (L)
...Rotation locus, (S1), (S2), (S
3), (S4)... Space, (Pi), (
P2)...Axis center.

Claims (1)

[Claims] 1. A flail mower type cutting blade (8) that is driven and rotated around a rotating shaft (9), and a cover (11) that covers the cutting blade (8) from above; a cutting space (S1) for taking in and cutting planted grass between the rotation locus (L) of the cutting blade (8) and the inner surface of the cover (11) when viewed in the axial direction of the rotation shaft (9); This reaping space (S1)
A lifting space (S2) for guiding and transporting the cut grass cut by
), a descending space (S3) for guiding and descending the grass clippings being lifted up, and a discharge space (S3) for diffusing the grass clippings being transported downward and releasing them onto the ground after cutting.
4), wherein the lifting space (S2) is narrowed at the back in a state where a conveying function for receiving the grass clippings from the cutting space (S1) and lifting it upward occurs. The descending space (S3) is formed in a shape where the path thereof gradually widens toward the discharge space (S4), and the reaping space (S1) and the discharge space (S4), The cover (
11) A mowing device formed by setting the shape of. 2. Both ends (34), (3) of the cover (11) forming the reaping space (S1) and the discharge space (S4)
4) respectively the lifting space (S2) and the descending space (S
3) with respect to the cover body (21) forming the pivot axis (P2), (P2) along the axis (P1) of the rotating shaft.
The mowing device according to claim 1, wherein the mowing device is configured to be able to swing upwardly around the mowing device. 3. A lifting mechanism (B) capable of driving and swinging the both ends (34) and (34) upward is provided, and the rotating shaft (9)
One of the ends (34) as the drive rotation in one direction
The driving device (A) of the rotary shaft (9) is brought into a state in which the other end (34) is rocked upward as the rotary shaft (9) is driven to rotate in the other direction. The mowing device according to claim 2, wherein the mowing mechanism and the lifting mechanism (B) are linked. 4. Both ends (34), (34) are horizontal horizontal walls (22), (22) that continue to the cover body (21), respectively.
and vertical vertical walls (23), (23) connected to this
4. The mowing device according to claim 1, wherein said vertical walls (23) and (23) are made of a flexible plate material.