JP2008035840A - Mowing implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mowing implement preventing small stones or the like from being scattered and surely reducing unmowed grass. <P>SOLUTION: A mower 4 of the mowing implement has a couple of cutters 14 and 15 arranged at a prescribed interval in the front and rear direction. Each of the cutter 14 or 15 is constituted of a shaft 18 or 19 and a hammer knife 21 or 22 at the periphery thereof. A scattering-preventing means 17 for preventing the small stones or the like from being scattered is installed in the front side of a cutter case 12 storing the cutters 14 and 15. The cutter 14 arranged at the front side functions as a grass-raising means for raising the grass falling down in the front direction. The grass raised by the cutter 14 is surely cut by the cutter 15 at the rear side, rotating in the up-cut direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a mowing work machine, and more particularly to a mowing work machine provided with a hammer knife type cutter.

  2. Description of the Related Art Conventionally, a mowing machine having a hammer knife type cutter on the front side of a vehicle body is known. In such a mowing machine, the cutter is rotated in a direction in which the grass is up-cut with respect to the traveling direction. By doing so, the grass roots resist the force of pulling out the grass, so that the grass can be cut well.

  On the other hand, when the cutter is rotated in the up-cut direction, it becomes easy to blow off pebbles and the like by the rotation of the cutter. For this reason, the front surface of the cutter case in which the cutter is accommodated is provided with a front cover for preventing the scattering of pebbles, etc., and a splash prevention means such as a rubber droop or a saddle chain (for example, Patent Documents 1 and 2). At this time, rubber droops and chains are deformed as grass to be mowed is taken into the cutter case, and the front cover is structured to escape upward in response to taking in, so that the taking in is not hindered. To be done.

Japanese Patent No. 3333870 JP-A-11-225530

  However, when the above-described scattering prevention means is provided, the scattering prevention means comes to rest on the grass when the grass is taken into the cutter case, so that the phenomenon that the grass falls greatly forward in the traveling direction is caused. Arise. In such a case, there is a problem that the cutter cannot contact the grass at an ideal angle and only rubs the surface, resulting in an increase in uncut residue.

  An object of the present invention is to provide a mowing work machine that can satisfactorily prevent pebbles and the like from being scattered and can reliably reduce uncut residue.

A mowing machine according to claim 1 of the present invention is a cutter in which a plurality of hammer knives are provided on the outer periphery of a rotating shaft, grass raising means provided on the front side of the cutter, these cutters and grass raising means. And a scattering prevention means provided on the front side of the cutter case, and the drafting means is provided so as to protrude from the outer periphery of the shaft rotating in a direction opposite to the cutter. And a plurality of claw-like members.
Here, the “front side” means the front side in the direction of travel of the mowing machine and means the side where the grass to be cut is taken in.

  A mowing work machine according to a second aspect is the mowing work machine according to the first aspect, wherein the grass raising means is a cutter in which the claw-like member is a hammer knife.

As described above, according to the first aspect of the present invention, the pebbles can be prevented from scattering outside the cutter case by the scattering prevention means provided in the mowing machine. Further, since the grass raising means is provided, the grass that has fallen by the scattering prevention means can be raised and reliably cut by the cutter on the rear stage side, so that uncut leaves can be reliably reduced. Therefore, the aforementioned object of the present invention can be achieved.
In addition, as a scattering prevention means, a front cover, a rubber droop, a chain, or a combination thereof can be applied.

  According to the second aspect of the present invention, the grass raising means is also constituted by a cutter, so that the grass can be mowed with a pair of cutters, double mowing can be realized in a single step, and the uncut residue is further reduced. it can.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view showing the entire mowing working machine 1 according to the present embodiment. In FIG. 1, a mowing machine 1 has a configuration in which a mower 4 is provided on the front side of a vehicle body 3 provided with a crawler type traveling device 2, and the traveling device 2 is mounted in the vehicle body 3. It is driven by an engine and a hydraulic drive device. On the rear side of the vehicle body 3, there are provided a control table 5 and a control device 6 on which an operator stands.

  Among these, the mower 4 is a hammer knife type, and is provided so as to be lifted up and down by a lift cylinder 3A (see FIGS. 3 and 4) attached to the vehicle body 3, and is driven by the engine. FIG. 2 is a perspective view of such a mower 4, FIG. 3 is a side sectional view of the mower 4, and FIG. 4 is a plan sectional view showing a part of the mower 4. In FIG. 3 and FIG. 4, the hatching of the cross section is omitted. Hereinafter, the mower 4 will be described in detail.

  2 to 4, the mower 4 includes a bottomless box-shaped cutter case 12 provided with a pair of sleds 11 on the left and right. Inside the cutter case 12, a pair of cutters 14 and 15 rotatably supported by the side plates 13 on both sides are accommodated in the front and rear at a predetermined interval. A power transmission device 16 for driving the cutters 14 and 15 is provided on one side surface of the cutter case 12, and the output of the engine is transmitted to the cutters 14 and 15 via the power transmission device 16. The Further, on the front side of the cutter case 12, a scatter preventing means 17 for preventing pebbles from scattering is attached.

  Each of the cutters 14 and 15 has a configuration in which a plurality of hammer knives 21 and 22 protrude from the outer periphery of the rotatable shafts 18 and 19 outward in the radial direction. In the present embodiment, the shaft diameter of the front cutter 14 is slightly smaller than the shaft diameter of the cutter 15, and the number of hammer knives 21 of the cutter 14 is also smaller than the number of hammer knives 22 of the cutter 15. The hammer knife 21 is a claw-like member of the present invention.

  The power transmission device 16 will be described in order from the engine side of the vehicle body 3. The pair of first and second pulleys 23 and 24 provided on the same axis, and the pair of third and fourth pulleys 25 provided on the same axis. , 26, a fifth pulley 27 provided on one end side of the cutter 15, a sixth pulley 28 having a gear 28A coaxially, and a gear 29 provided on one end side of the cutter 14 and meshing with the gear 28A. The output from the engine is transmitted by the belt wound around the sixth pulleys 23-28.

  Here, since the gear 29 of the cutter 14 is engaged with the gear 28A of the sixth pulley 28, the rotation directions of the cutters 14 and 15 are opposite to each other. In the present embodiment, as indicated by an arrow in FIG. 3, the cutter 14 rotates so as to be down-cut with respect to the forward movement, and the cutter 15 rotates so as to be up-cut. The rotational speeds of the cutters 14 and 15 are set to be substantially the same in this embodiment.

  The shaft 31 connecting the first and second pulleys 23 and 24 is supported by a support arm 32 extending rearward from the cutter case 12 and rolls the third and fourth pulleys 25 and 26 together. The longer shaft 33 is supported by a support arm 34. And by using such shafts 31 and 33 and the first to fourth pulleys 23 to 26, the power transmission path from the engine is directed from the center side to one side surface of the cutter case 12.

  The scattering prevention means 17 includes a rotation arm 41 provided rotatably on each side plate 13 and a front cover 42 provided between the rotation arms 41. A chain 43 formed in a shape is suspended. One end of the coil spring 44 is locked to the upper end of the front cover 42, and the other end of the coil spring 44 is locked to a predetermined position of the side plate 13. Such a coil spring 44 assists the upward rotation of the scattering prevention means 17.

  When the mowing machine 1 is simply running, the scattering prevention means 17 is in the lowest state, and the pebbles blown off by the cutter 14 (or the cutter 15 in some cases) hit the front cover 42 or the chain 43 to the outside. It can be prevented from scattering. Further, during the mowing operation, the front cover 42 and the chain 43 are lifted upward by the grass taken into the cutter case 12 and do not play a role in preventing scattering, but pebbles are also scattered outside by the taken-in grass. Is prevented.

  In the mower 4 having the above-described configuration, the biggest feature is that the cutter 14 is provided as compared with the conventional one. During the mowing operation, the grass taken into the cutter case 12 pushes up the scattering prevention means 17 as described above, but falls down to the front side due to the weight of the scattering prevention means 17. I couldn't mow.

  However, according to the mower 4 of the present embodiment, the hammer knife 21 of the cutter 14 rotating in the down cut direction is brought into contact with the grass that has fallen forward, and is moved along the outer periphery of the rotating cutter 14. Let the grass fly backwards. Thereafter, the grass that has fluttered to the rear side is surely cut by up-cutting the cutter 15 on the rear side, and uncut cutting can be reliably reduced. That is, the cutter 14 is a drafting means according to the present invention.

  Further, when raising the grass, the grass may be cut by the contact of the hammer knife 21 of the cutter 14, and therefore, when the action of the subsequent cutter 15 is added, the double cutting can be completed in one step. Can be further reduced.

The best configuration, method, and the like for carrying out the present invention have been disclosed above, but the present invention is not limited to this. That is, the invention has been illustrated and described with particular reference to certain specific embodiments, but without departing from the spirit and scope of the invention, Various modifications can be made by those skilled in the art in terms of quantity and other detailed configurations.
Therefore, the description limited to the shape, quantity and the like disclosed above is an example for easy understanding of the present invention, and does not limit the present invention. The description by the name of the member which remove | excluded the limitation of one part or all of such restrictions is included in this invention.

  For example, in the above-described embodiment, the cutter 14 is used as the grass raising means for raising the fallen grass, and the hammer 14 is attached to the cutter 14. However, the grass raising means of the present invention is opposite to the cutter 15. The shaft rotating in the direction only needs to be provided with a claw-like member projecting radially from the outer periphery thereof, and whether or not a hammer knife is used as this claw-like member is arbitrary. That is, as shown in FIG. 4, the tip of the hammer knife 21 can be used as a cutter blade to cut grass, but the tip is not a cutter blade and has an appropriate shape convenient for raising grass. It may be.

  In the above-described embodiment, the cutters 14 and 15 are set to have substantially the same rotational speed. However, the diameters of the fifth and sixth pulleys 27 and 28 are changed, and the diameters of the gears 28A and 29 are changed. Thus, the respective rotation speeds may be changed, and which rotation speed of the cutters 14 and 15 is increased and which is decreased may be appropriately determined in the implementation.

  The mowing work machine 1 of the above embodiment is provided with the control table 5 on which the operator gets up in an upright position, but the mowing work machine of the present invention may be configured to be operated while the operator is walking, The structure by which the seating seat was provided on the control board may be sufficient.

  INDUSTRIAL APPLICABILITY The present invention can be used for a mowing machine having a mower provided with means for preventing scattering of pebbles and the like.

The side view which shows the whole mowing work machine concerning one Embodiment of this invention. The perspective view of the mowing machine which comprises a mowing working machine. A sectional side view of a mower. The cross-sectional view which shows a part of mower.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Mowing working machine, 4 ... Mowing machine, 12 ... Cutter case, 14 ... Cutter which is a drafting means, 15 ... Cutter, 17 ... Scatter prevention means, 18 ... Shaft of the drafting means, 19 ... Shaft, 21 ... Claw Hammer knife that is a member, 22 ... Hammer knife.

Claims (2)

A cutter provided with a plurality of hammer knives on the outer periphery of the rotating shaft;
Drafting means provided on the front side of the cutter;
A cutter case for accommodating these cutters and the drafting means;
With scattering prevention means provided on the front side of the cutter case,
The drafting means includes a shaft rotating in a direction opposite to the cutter;
A mowing work machine comprising a plurality of claw-like members protruding from the outer periphery of the shaft. In the mowing machine according to claim 1,
The mowing working machine, wherein the grass raising means is a cutter in which the claw-like member is a hammer knife.