JP2017104074A - Grass mower - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a grass mower with improved attachment of a counterweight which is required when a different grass collecting container is selectively attached.SOLUTION: A grass mower includes a machine body frame 10, a mower unit mounted on the machine body frame 10, a grass collecting container that can be selectively attached to a rear part of the machine body frame 10, a front left wheel 11a and a front right wheel 11b supported by a front wheel support arm 3 provided at a front part of the machine body frame 10, a counterweight 4 consisting of a plurality of weight bodies 40, and a weight bracket 43 including a plurality of attaching parts provided at the front wheel support arm 3 and attached with the weight body 40.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a mower that mounts a mower unit on an airframe frame and that can be fitted with a grass collection container that stores mowing grass cut by the mower unit.

  In the mower according to Patent Document 1, an engine is mounted on the rear part of the body frame, a grass collecting container is connected to the rear end of the body frame, and the mower unit is suspended from the body frame between the front wheels and the rear wheels. . Rear weight attaching means for attaching weights is provided at the rear end of the body frame, and front weight attaching means for attaching weights is provided at the front end of the body frame. The front wheel is supported by both ends of a front wheel support arm positioned rearward of the front weight mounting means. In this mower, when the grass container is connected to the rear part of the body frame, the weight is removed from the rear weight attaching means and replaced with the front weight attaching means. As a result, although the weight on the rear side of the vehicle body is increased by the amount of the grass collection container, the front and rear weights of the vehicle are balanced, the front wheels are appropriately subjected to ground load, and the caster function of the front wheels is maintained well. The

  However, since it is not considered to selectively connect grass collection containers having different weights to the body frame, when replacing a light collection container with a heavy collection container, the weight attached to the front weight attachment means Need to be replaced with a heavier, different weight. On the contrary, when the heavy grass collection container is replaced with the light grass collection container, it is necessary to replace the weight attached to the front weight attachment means with another lighter weight.

  Further, in the mower according to Patent Document 1, the weight attaching means for attaching the weight is provided at the front end of the body frame, and similarly, interference with the front wheel support arm attached near the front end of the body frame must be avoided. Don't be. For this reason, the front weight mounting means is provided at a position away from the front wheel support arm, resulting in an inconvenience that the entire length of the vehicle body becomes long.

JP 2012-71795 A

  In view of the above situation, there is a demand for an improvement related to the attachment of the counterweight, which is necessary when selectively mounting different grass collection containers.

  A mower according to the present invention includes a fuselage frame, a mower unit mounted on the fuselage frame, a grass collecting container that can be selectively mounted on a rear portion of the fuselage frame, and a front wheel provided on a front portion of the fuselage frame. A weight bracket having a support arm, a left front wheel and a right front wheel supported by the front wheel support arm, a counterweight composed of a plurality of weight bodies, and a plurality of mounting portions provided on the front wheel support arm and for mounting the weight bodies. And.

  In this configuration, a front wheel support arm is provided at the front portion of the body frame, and a weight bracket is provided on the front wheel support arm. The weight bracket is provided with a plurality of mounting portions on which weight bodies can be mounted. For example, when a light grass container is installed, one or a few weight bodies are attached to each attachment part, and when a heavy grass container is attached, multiple weight bodies are attached to each attachment part. Is done. Therefore, prepare only the required number of weight bodies for heavy grass collection containers, and if a light grass collection container is installed or a grass collection container is not installed, install the necessary number of weight bodies or not at all. Do not wear it.

  Further, since the weight bracket is provided on the front wheel support arm, as a result, the weight body is provided on the front wheel support arm. Therefore, when the front wheel support arm is attached to the vehicle body frame, it is not necessary to consider interference between the front wheel support arm, the weight bracket, and the weight body. Therefore, there is no inconvenience that the body frame becomes longer than necessary.

  As the distance between the front wheels and the rear wheels (wheel base) is longer, the straight running stability is improved, but the vehicle body frame becomes longer, so the vehicle body becomes heavier. Further, when the mower unit is arranged between the front wheel and the rear wheel, the longer the wheel base, the better. Therefore, in a preferred embodiment of the present invention, the front wheel support arm has an arcuate shape having a left bent portion bent forward at the left end region and a right bent portion bent forward at the right end region, A left front wheel is attached to the tip of the left bent portion, a right front wheel is attached to the tip of the right bent portion, and the weight bracket is fixed to the left bent portion and the right bent portion. With this configuration, it is possible to suppress the overall length of the vehicle body frame from being increased while taking a longer wheel base. Further, in this configuration, the front wheel support arm and the front wheel protrude forward from the front end of the body frame. As a result, even when a rolling structure is used in which the front wheel support arm is connected to the vehicle body frame via the roll shaft, a sufficient gap is obtained between the front wheel support arm and the front wheel and the vehicle body frame and other members during the rolling. It is done.

  When the front wheel is a caster wheel, the front wheel is located behind the support position by the front wheel support frame, so the gap between the front wheel and other members is reduced. As a preferred embodiment for sufficiently securing the clearance, the left and right front wheels are attached to the front and rear bent ends of the front wheel support frame via a caster bracket so as to be rotatable around the vertical axis. Is proposed.

  A simple configuration for changing the weight of the counterweight according to the type of grass collection container is fixed to the front wheel support arm, and its weight bracket forms multiple mounting parts so that any number of weight bodies can be mounted. It is to be. At this time, it is preferable that the mounting portions are arranged side by side so that the removal of the weight body is not disturbed by other weight bodies. Accordingly, in one of the preferred embodiments of the present invention, a plurality of the mounting portions are arranged in parallel in the transverse direction of the fuselage in each weight bracket, and the weight bodies are aligned in the transverse direction of the fuselage. It can be installed with.

  If the weight body mounted on the weight bracket is configured to be positioned in front of the front wheel axle above the left front wheel or the right front wheel, the weight body is unlikely to obstruct traveling and work.

  In one preferred embodiment of the present invention, a corner pole unit for checking the width of the mower unit and / or the cutting width of the mower unit is provided on the front wheel support arm. The corner pole unit makes it easier for the driver to check the width and cutting width of the mower unit. this. The corner pole unit is mounted on the front wheel support arm that also enters the relatively narrow field of view of the driver facing forward, so that the driver's viewpoint moves to check the width of the mower unit and the cutting width And stable mowing operation can be expected.

It is a perspective view of the mower which is one of the embodiments of the present invention. It is a side view of a mower. It is a top view of a mower. It is a perspective view which shows a body frame and a front-wheel support arm. It is a perspective view which shows the weight bracket with no weight body mounted | worn. It is a perspective view which shows the mounting state of the weight body to a weight bracket. It is a perspective view which shows the mounting state of the weight body to a weight bracket. It is a perspective view which shows the mounting state of the weight body to a weight bracket. It is a front view of a weight body. It is a perspective view of a blower. It is a disassembled perspective view of a blower.

  Next, one specific embodiment of a mower according to the present invention will be described with reference to the drawings. In this embodiment, a mid-mount riding mower is taken up as the mower. 1 is a perspective view of a mower, FIG. 2 is a side view, FIG. 3 is a plan view, and FIG. 3 is a schematic perspective view showing a front wheel region of the fuselage. In this specification, the longitudinal direction of the aircraft is the direction of the aircraft central axis (also referred to as the aircraft longitudinal axis) that extends in the horizontal direction along the traveling direction of the aircraft, and the aircraft transverse direction (also simply referred to as the lateral direction). , A direction extending in the horizontal direction perpendicular to the machine body central axis. “Front (front)” means the forward side in the longitudinal direction of the aircraft, and “rear (backward)” means the backward side in the longitudinal direction of the aircraft. “Left (left side)” means left when facing the forward direction of the aircraft, and “Right (right side)” means right when facing the forward direction of the aircraft. Upper (upper) and lower (lower) represent the positional relationship in the vertical direction (height direction) of the aircraft.

  As shown in FIG. 4, the machine body frame 10 constituting the traveling machine body of the mower includes a left frame 10a and a right frame 10b that extend in the longitudinal direction of the machine body and are connected to each other by a cross beam. The front area of the fuselage frame 10 is provided with a left front wheel 11a and a right front wheel 11b, which are caster-type idler wheels, and the central area of the fuselage frame 10 is provided with a left rear wheel 12a and a right rear wheel 12b, which are drive wheels. It has been. When it is not necessary to distinguish between the left front wheel 11a and the right front wheel 11b, the term front wheel 11 is simply used. Similarly, when it is not necessary to particularly distinguish the left rear wheel 12a and the right rear wheel 12b, the term rear wheel 12 is simply used.

  Between the front wheel 11 and the rear wheel 12, the mower unit 6 is suspended and supported so as to be movable up and down. A grass collection container 15 for collecting the grass cut from the mower unit 6 is detachably attached to the rear end of the body frame 10.

  As shown in FIGS. 1 and 2, a driver's seat 14 is disposed above the center of the fuselage frame 10, and an engine 13 is mounted behind the driver's seat 14. Steps 17 located at the feet of the driver seat 14 are laid on the upper surface of the left frame 10a, and fenders 16 are mounted on the left and right sides of the driver seat 14.

  Between the driver's seat 14 and the grass collection container 15, a portal-shaped lops 18 is erected and fixed in an upright posture. The LOPs 18 includes left and right base end portions 18a that protrude upward through the fender 16, and a portal frame portion 18b that is connected to the upper ends of the left and right base end portions 18a so as to be foldable rearward around the fulcrum X1. It consists of

  The left rear wheel 12a and the right rear wheel 12b are driven independently from each other by engine power shifted by a hydrostatic continuously variable transmission (not shown). The left rear wheel 12a and the right rear wheel 12b are independently stepless by separately swinging a pair of left and right control levers 19 arranged to be swingable back and forth on the left and right sides of the driver seat 14. Driven forward and backward at speed.

  The mower unit 6 is supported by being suspended from the body frame 10 via a four-link type link mechanism 60. In the mower unit 6, three rotary blades 62 that are driven to rotate around the longitudinal axis center in the mower deck 61 that forms an internal space with the mowing surface, and the central rotary blade 62 is slightly displaced forward. Thus, they are arranged in a triangular shape in plan view. Mowed grass is collected in the side end region of the mower deck 61 by the wind generated by the rotating blade 62. A mowing grass transporting device 5 for transporting the mowing grass cut by the mower unit 6 from the mower unit 6 to the grass collecting container 15 is disposed on the side of the body frame 10. The mower unit 6 includes a transport duct 5A and a blower 5B.

  Next, the relationship between the body frame 10 and the front wheels 11 will be described with reference to FIG. A roll shaft 30 extending in the front-rear direction of the body is provided at the center of the front cross beam 10c of the body frame 10, and the front wheel support arm 3 is swingably connected to the roll shaft 30. The front wheel support arm 3 is made of a pipe, and a straight portion 33 and a left bent portion 31 and a right bent portion 32 positioned on both sides of the straight portion 33 are formed by bending. The left bent portion 31 is bent so as to face the front outside from the left side of the straight portion 33. The right bent portion 32 is bent so as to face the front outside from the right side of the straight portion 33. As a result, the front wheel support arm 3 has an arcuate shape as a whole, and the free end regions of the left bent portion 31 and the right bent portion 32 are positioned in front of the straight portion 33 in the longitudinal direction of the vehicle body.

  A front wheel support unit 35 is attached to the free ends of the left bent portion 31 and the right bent portion 32. Since the front wheel support arm 3 supports the front wheel 11 by a caster system, a U-shaped fork bracket 351 serving as a caster bracket, a rotating shaft 352 erected on the upper surface of the fork bracket 351, and a rotating shaft 352 are supported. And a cylindrical body 353 to be used. A front axle 110 having a front wheel axle center Pf is provided at the lower end portion of the fork bracket 351, and the front wheel 11 is rotatably attached to the front axle 110.

  The front wheel support unit 35 is attached with a counterweight 4 that is balanced with respect to the weight of the grass collection container 15, particularly according to the weight of the grass collection container 15. The counterweight 4 includes a weight bracket 43 and a weight body 40 attached to a plurality of attachment portions 44 provided on the weight bracket 43. In this embodiment, as the counterweight, the left counterweight 41 is disposed at the left bent portion 31 and the right counterweight 42 is disposed at the right bent portion 32. The left counterweight 41 includes a left weight bracket 43A attached to the left bent portion 31 as a weight bracket 43, and the right counterweight 42 includes a right weight bracket 43B attached to the right bent portion 32 as a weight bracket 43. The weight bracket 43 is positioned above the front wheel 11 and in front of the front wheel axle center Pf. As a result, the weight body 40 attached to the weight bracket 43 is also above the front wheel 11 and forward of the front wheel axle center Pf. Located in.

  As shown in FIG. 5, the weight bracket 43 is provided with three mounting portions 44 arranged side by side in the cross-machine direction. The weight of the counterweight 4 can be selected by selecting the mounting of the weight body 40 on each mounting portion 44. FIG. 6 shows a weight bracket 43 to which one weight body 40 is attached, FIG. 7 shows a weight bracket 43 to which two weight bodies 40 are attached, and FIG. 8 shows three weight bodies 40 to be attached. A weight bracket 43 is shown.

  As shown in FIG. 9, the weight body 40 is a substantially rectangular parallelepiped with a small thickness, and a handle 401 is formed on the upper part and a slit 402 is formed on the upper side from the lower surface. The weight body 40 is fixed to the weight bracket 43 by inserting the guide plate and the fixing pin provided in the weight bracket 43 into the slit 402.

  As schematically shown in FIG. 4, the driver sitting on the driver's seat 14 confirms the width (outer end position) of the mower unit 6 in the cross-machine direction and the cutting width (mowing boundary position) of the mower unit 6. A corner pole unit 8 is provided in both end regions of the front wheel support arm 3. The corner pole unit 8 has an outer end position pole 81 and a mowing boundary position pole 82 erected.

  As shown in FIG. 1, the blower 5B is attached to the right end of the mower deck 61 via a U-shaped blower support frame 10e. The blower 5B has a suction port connected to the internal space of the mower deck 61 and a discharge port connected to the front end port of the transport duct 5A. A connection structure between the blower 5B and the mower deck 61 is shown in FIG. In FIG. 10, the moor deck 61 is omitted in order to make it easy to see the connection structure of the blower 5 </ b> B to the mower deck 61.

  As shown in FIG. 11, the blower 5 </ b> B includes a resin blower body 50 and a metal upper case 51. The blower body 50 includes a lower case 52 connected to the right side surface of the mower deck 61, a first connection portion 53 extending upward from the upper surface of the lower case 52, and a radially outward side from the upper end of the first connection portion 53. And a first connecting portion 53 and a cylindrical second connecting portion 55 connected to the flat plate portion 54 and extending rearward. A two-part metal wear prevention plate 70 is provided on the upper surface of the flat plate portion 54.

  At the lower end of the upper case 51, a flange portion 56 that protrudes radially outward is formed. The upper case 51 is attached to the flat plate portion 54 with the wear preventing plate 70 sandwiched between the flange portions 56. A fan 57 is disposed inside the upper case 51. At the center of the upper case 51, a rotating shaft 58 to which the fan 57 is fixed is provided in the vertical direction. The upper end of the rotating shaft 58 protrudes from the upper surface of the upper case 51, and the pulley 59 is fixed thereto. The pulley 59 is branched from the belt transmission mechanism provided on the upper surface of the mower deck 61.

  An opening 52 b that receives the side end portion 52 a of the mower deck 61 is formed in the side end portion 52 a of the lower case 52 in order to connect to the mower deck 61. A gap is formed between the upper edge of the side end 52a and the upper surface of the top wall of the mower deck 61 in order to absorb the assembly error and the displacement of the blower 5B and the mower deck 61. In order to fill this gap, a flat rubber mat 7 is riveted to the lower surface of the upper edge of the side end portion 52a. The thickness of the rubber mat 7 is slightly shorter than or substantially the same as the gap, and prevents the grass from blowing out from the gap. When a strong displacement in the vertical direction occurs in the blower 5B or the mower deck 61 and comes into contact with the rubber mat 7, the displacement is absorbed by the elasticity of the rubber mat 7.

[Another embodiment]
(1) In the above-described embodiment, the front wheel support arm 3 that supports the front wheel 11 can be rolled, but may be fixed to the body frame 10.
(2) Although the front wheel 11 is a caster type free wheel in the above-described embodiment, it may be a drive wheel.
(3) The shapes of the weight bracket 43 and the weight body 40 are not specified in the above-described embodiment. Further, the mounting position of the weight bracket 43 and the number of mounting portions 44, that is, the number of mountable weight bodies 40 are also changed according to the specifications of the mower.

  The present invention is applicable to a mower that can be selectively equipped with different grass collecting containers at the rear of the body frame.

10: Airframe frame 11: Front wheel 12: Rear wheel 15: Grass collecting container 3: Front wheel support arm 30: Roll shaft 31: Left bent part 32: Right bent part 33: Straight part 35: Front wheel support unit 351: Fork bracket 352: Rotating shaft 353: cylinder 4: counterweight 40: weight body 41: left counterweight 42: right counterweight 43: weight bracket 43A: left weight bracket 43B: right weight bracket 44: mounting portion 5: grass cutting device 5A: Conveyance duct 5B: Blower 50: Blower body 51: Upper case 52: Lower case 52a: Side end 52b: Opening 53: First connecting portion 54: Flat plate portion 55: Second connecting portion 56: Hook portion 57: Fan 58: Rotating shaft 59: pulley 6: mower unit 60: link mechanism 61: mower deck 62: rotation Blade 7: Rubber mat 70: Wear prevention plate 8: Corner pole unit 81: Outer end position pole 82: Mowing boundary position pole Pf: Front wheel axle

Claims (7)

The fuselage frame,
A mower unit mounted on the fuselage frame;
A grass container that can be selectively installed at the rear of the fuselage frame;
A front wheel support arm provided at a front portion of the body frame;
A left front wheel and a right front wheel supported by the front wheel support arm;
A counterweight composed of a plurality of weight bodies;
A weight bracket provided on the front wheel support arm and having a plurality of mounting portions for mounting the weight body;
Mower equipped with.   The front wheel support arm has an arcuate shape having a left bent portion bent forward at a left end region thereof and a right bent portion bent forward at a right end region thereof, and a left front wheel is attached to a distal end portion of the left bent portion. The mowing machine according to claim 1, wherein a right front wheel is attached to a tip portion of the right bent portion, and the weight bracket is fixed to the left bent portion and the right bent portion.   The left front wheel is attached to the tip of the left bent portion via a caster bracket so as to be rotatable about a vertical axis, and the right front wheel is attached to the tip of the right bent portion via a caster bracket. The mower according to claim 2, wherein the mower is attached so as to be rotatable around the center.   The plurality of mounting portions are arranged in parallel in the transverse direction of the aircraft on each of the weight brackets, and the weight body can be attached to each of the weight brackets in the transverse direction of the aircraft. The mower described in 1.   The mower according to any one of claims 1 to 4, wherein the weight body mounted on the mounting portion is positioned in front of a front wheel axle above the left front wheel or the right front wheel.   6. The mower according to claim 1, wherein the front wheel support arm is connected to a front end of the body frame via a roll shaft, and the front wheel support arm rolls with respect to the body frame. .   The corner pole unit for confirming the width | variety of the said mower unit, the cutting width by the said mower unit, or both is provided in the both end area | region of the said front-wheel support arm. Mower.

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