JP5320533B2 - Mower - Google Patents

Description

The present invention is mainly a small riding type of mowers or similar lawn mowers, and relates to operability and workability thereof.

Small passenger mowers have been used since the beginning of their use, but the cutting blades rotate at high speed and run on wheels under the fuselage, which causes various problems due to scattering of foreign matter such as cut grass, cutting branches or pebbles. there were. Examples of harmful effects on the machine side include mowing grass entangled with the wheel shaft, cutting waste as dust and dust, and engine malfunction (Patent Document 1). There were problems such as injury to third parties and damage to other objects. (Patent Document 2)
Japanese Patent No. 3278408 JP 2003-164 211 A

Although it seems that the problems at the beginning of the spread of small-sized passenger mowers have been almost solved, there are still some unsolved problems in the structure. As one of the problems on the machine side, there is a problem that mowing grass and foreign matter enter between the mowing unit and the body frame and accumulate. The mowing part of the mower is connected to the body frame by a link so that it can be raised and lowered as necessary, and there is a pulley and belt transmission mechanism for driving the cutting blade between them. (FIG. 1) If cut grass or foreign matter enters this, there are problems such as a decrease in output due to wrapping around the pulley shaft, and belt detachment due to jamming in the pulley. In addition, there is a problem that the lifting / lowering operation becomes heavy or the worst lifting / lowering operation (particularly the lifting operation) cannot be performed when it is sandwiched between links. If maintenance is carried out at the end of work, such troubles are relatively rare, but there are few people who do maintenance every day during the busy season of early summer. The present invention solves the above problems of the mower and provides a mower having excellent workability with less work trouble.

The means taken in the present invention to solve the above problems is to cover the space between the cover or deck upper surface of the mowing part of the small riding mower and the lower surface of the machine frame, and to enter the cut grass, mowing branches, foreign matter, etc. shielding sheet to prevent, or shield, the body travel direction substantially front side, and in the vertical direction with respect to a substantially forward direction, the replaceable one or more, the body frame side, or cutting unit cover or deck The configuration is arranged on the side. Further, the shielding sheet or the shielding plate is connected with the cover or deck, or with the frame, or so that the shielding height surface of the shielding sheet or the shielding plate can be changed according to the height position of the cutting portion. Bend or slide at the contact surfaces with each other, or extend and contract in the vertical direction, so that the lower part of the machine frame and the upper part of the cover or deck are shielded regardless of the height position of the cutting part. It is that.

  The present invention has the following effects by applying the above means.

  Since the penetration of cut grass and foreign objects between the machine frame and the cutting part is greatly reduced, there are no work troubles such as reduced cutting blade rotation output, belt disengagement, and poor lifting / lowering operation of the cutting part, improving work efficiency. .

  Since the entry of cut grass, foreign objects, etc. between the machine frame and the cutting part is greatly reduced, it is no longer necessary to interrupt the work every time it accumulates, and it is not necessary to perform the discharge work. Work becomes possible and workability is greatly improved.

Since the entry of cut grass, foreign matter, etc. between the machine frame and the cutting part is greatly reduced, the maintenance after work is greatly simplified and the work comfort is improved.

Simply attaching the same shielding material (fixing plate) as the conventional countermeasures for similar problems is incomplete because the mowing part moves up and down. By using a flexible material so that the shielding surface can be increased or decreased according to the vertical position of the mowing part, it is possible to bend it in a very simple manner without incurring significant costs. Was almost completely prevented.

  A first embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a left side view of an embodiment of the mower according to the present invention, FIG. 2 is a plan view, FIG. 3 is a front view, and FIG. The illustration is partially omitted for clarity. The mowing unit 1 is suspended by a pair of front links 14-14 and a rear link 15-15 at a substantially central portion of the body frame 2, and the connection link 16 is moved up and down by operating the elevating lever 13 to adjust the position of the mowing height. It can be pulled up and fixed when passing over obstacles and for loading and unloading on trucks. A spring 18 and a gas cylinder 19 are attached to assist the operating force of the lever 13. The engine 3 that is a prime mover has an output shaft mounted in the direction of the hull, and drives a traveling pulley 4R that is fixed to the input shaft of the transmission 4 while driving a pair of traveling pulleys 3R that is fixed to the output shaft. Travel by wheels 6-6. Power transmission is performed by a belt tension system in which the travel tension pulley 2R2 is pressed against the belt. The pair of steering wheels 5-5 driven by the steering 7 steer the vehicle.

  On the other hand, on the other side of the drive pulley 3R fixed to the engine output shaft, the work pulley 1R disposed on the upper portion of the cutting portion 1 is driven, and the cutting blade 11 that is connected to the pulley is rotated. You can mow the grass at a preset cutting height. The clutch mechanism for turning on and off the working power of the mowing unit 1 is performed by a belt tension method in which the work tension pulley 2R1 is pressed against the belt. A cover 12 that covers the entire rotation region of the cutting blade 11 is attached to the mowing unit 1 for the purpose of safety protection and prevention of the cutting of grass cutting, and is called a so-called deck. One end of the front link 14 and the rear link 15 is pivotally supported at the lower portion of the body frame 2 and at the other end thereof at the upper portion of the deck 12. The deck 12 is also provided with a guard cover for preventing scattering of cut grass and foreign matter by a rotating blade along the outer periphery.

  As described above, almost all pulley and belt transmission mechanisms that transmit power for both running and work are concentrated between the body frame 2 and the deck 12 of the cutting unit 1. If mowing grass, foreign matter, etc. get stuck here and get caught between pulleys or get entangled with the rotating shaft, problems such as reduced output and belt detachment will occur. Further, if the front and rear links 14 and 15 that support the raising and lowering of the cutting part 1 and the body frame 2 and the deck 12 are accumulated, the lifting lever 13 becomes heavy and the worst lifting operation (especially the raising direction) cannot be performed. Although these have the effect of preventing the cutting grass from entering to some extent with the conventional guard cover, they are completely insufficient because the space between the airframe frame 2 and the deck 12 is basically open.

The present invention is realized from the idea of fundamentally shielding the entrance of cut grass and foreign matter between the body frame 2 and the deck 12 of the cutting unit 1. The shielding sheet of the present invention will be described. One end of the seat is bolted to the lower part on the body frame 2 side through a mounting stay so that it can be replaced, and the other end of the seat is bent and contacted to the upper surface of the deck 12 as shown in FIG. As the shielding material, a flexible rubber sheet having a thickness of 5 mm was used. With this configuration, the leading end of the sheet slides on the contact surface on the deck 12 in conjunction with the raising / lowering operation of the deck 12, that is, the cutting part 1, so that the bent part moves up and down regardless of the height position of the cutting part 1. And the top of the deck 12 are completely shielded. This time, in order to make use of the conventional machine structure as it is, the three-piece configuration of the left shielding sheet S1, the right shielding sheet S2, and the central shielding sheet S3 is adopted in order to avoid the front link 14. Strictly speaking, there was a gap corresponding to the link width and it was not completely shielded, but the effect was great.

  With the above-described configuration of the present invention, the amount of cut grass or foreign matter entering between the body frame 2 and the cutting unit 1 is greatly reduced, and the output suddenly becomes insufficient during the mowing operation, the belt comes off, the cutting unit 1 It is possible to work comfortably without the occurrence of troubles such as lifting and lowering the operation of the machine, so that the work efficiency is greatly improved because there is no discharge maintenance work after the work is interrupted. became.

  In the embodiment, the shielding sheet S is mounted on the front side with respect to the aircraft traveling direction, but when it is attached to the side and the rear, the effect is not significantly different. Most of the approach can be prevented by shielding around the grass intake direction and the wind-up direction from the front wheel. The bending of the rubber sheet of the first embodiment on the upper surface of the deck 12 is the simplest and cheapest method obtained as a result of various attempts such as a shielding method and shielding parts such as a link movable plate and an accordion resin thick sheet. It is.

  FIG. 5 shows a second embodiment. The left shielding sheet S21 when the front end of the rubber sheet of the first embodiment is also fixed to the deck 12 side is shown. By doing so, the gap between the sheet S21 and the deck 12 is almost completely eliminated even when the cutting portion 1 is at the lowest position, but the time and labor for replacement increases. FIG. 6 shows a third embodiment. The left-side shielding sheet S31 that is simply suspended from the front side of the deck 12 is shown. In this case, in order to follow the outer peripheral shape of the deck 12, in the case of the left shielding sheet, it is attached to the left side from the front side of the body. Even in this state, the effect can be obtained, but because the drooping is free, the cutting blade 11 and the front wheel 5-5 are subject to interference, and the deck 12 slides on the sheet S31. .

  It can be used for all small and medium-sized work machines such as small and medium-sized agricultural machines and civil engineering machines where the working part moves up and down and dislikes the entry of foreign matter.

It is a left view which shows this 1st Example mowing machine. It is a top view which shows this 1st Example mowing machine. It is a front view which shows this 1st Example mowing machine. 1 is a perspective view of a mower according to a first embodiment showing a state of wearing a shielding sheet of the present invention. It is a left side partial view showing a mowing machine of the second embodiment. It is a left side partial view showing a third embodiment mowing machine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mowing part 2 Airframe frame 3 Engine 4 Transmission 5 Front wheel 6 Drive rear wheel 7 Steering 11 Cutting blade 12 Deck 13 Lifting lever 14 Front link 15 Rear link 1R Work pulley 2R Tension pulley 3R Engine pulley 4R Traveling pulley S1 Left shielding sheet S2 Right shielding sheet S3 Center shielding sheet

Claims (2)

In a small riding mower mounted with an engine or a motor, arranged between a pair of left and right front wheels and rear wheels, and a cutting and steering mechanism between the front and rear wheels so that it can be operated as if driving a car. shields the space between the cover or deck upper surface and the body frame lower face of the cutting unit, cutting grass, cutting branches, shielding sheet to prevent the entry of foreign matter, or shield plate, the aircraft travel direction substantially front side One or two or more can be exchanged so as to form an up-down direction surface facing substantially forward in the position, and arranged on the frame side or the cover or deck side. A small riding mower. The shielding sheet, or the shielding plate, with the cover or deck, or with the frame , so that the height of the shielding surface of the shielding sheet, or the shielding plate can be changed according to the height position of the cutting portion . Or, it can be bent or slid at the contact surface of both the cover or deck and the frame, or can be expanded and contracted vertically, so that the lower side of the fuselage frame and the upper part of the cover or deck do not depend on the height position of the cutting part. The small riding mower according to claim 1, which is configured to shield the gap.

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