JP2014087326A - Lawn mower machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lawn mower machine having a mower deck improved to cope with a front wheel run-over.SOLUTION: A lawn mower machine has a mower 1 removably interposed between front wheels 10 and rear wheels 6 of a running vehicle body 2. The lawn mower machine comprises a transmission cover 33 on the upper face of a mower deck 3 so that the front wheels 10 move along a transmission passage P formed on the upper faces of the mower deck 3 and the transmission cover 33 and thereby ride over the mower 1. The transmission cover 33 is integrally provided with a guide plate 43 along the transmission passage P. On the side opposite to the existing side of the front wheels 10 across the guide plate 43, a link support bracket 37 and a connecting link pin 38 are located which connect the lower end side of a mower link 36 to connect the mower 1 to the running vehicle body 2.

Description

  The present invention relates to a lawnmower working machine, and more particularly to an apparatus for facilitating attachment / detachment work by moving over a mower that is detachably connected between front and rear wheels.

  Conventionally, there is a mid-mount type lawn mower that detachably attaches a mower between the front and rear wheels of the tractor vehicle body, and in order to improve the efficiency and ease of the work of positioning this mower on the abdomen of the tractor vehicle body, There is a configuration in which it is positioned over the abdomen of the tractor body (Patent Document 1).

  And there exists a structure which provides a transmission cover on the upper surface of a moor deck, and gets over the upper surface of this transmission cover (patent document 2). In this configuration, a reinforcing member that extends in front of and behind the ceiling wall is welded to the inside of the transmission cover, thereby increasing the strength of the transmission cover and suppressing the displacement of the wheel when the front wheel gets over the mower.

Japanese Patent No. 4509132 JP 2008-289429 A

  By the way, according to Patent Document 1, the rear end portion of the mower deck is provided with a rearward extension plate, and the extension plate is provided with a non-slip portion for preventing the wheels from slipping when the work vehicle is climbed. When the work vehicle is moved forward when the mower is mounted on the abdomen of the car, the front wheel is prevented from slipping against the mower deck, and the mower is positioned between the front wheel and the rear wheel of the work vehicle over the mower deck. Can be attached to the abdomen of work vehicles. However, there is no consideration for the reinforcement structure of the mower deck itself or the smoothness in passing through the front wheels.

  Further, Patent Document 2 in which a transmission cover provided on the upper surface of the mower deck has a reinforcing structure has room for improvement in smooth movement from the ride-over plate to the mower deck.

  According to the first aspect of the present invention, in the lawnmower working machine in which the mower 1 is detachably mounted between the front wheel 10 and the rear wheel 6 of the traveling vehicle body 2, the transmission cover 33 is provided on the upper surface of the mower deck 3, and the front wheel 10 is provided with the mower deck. 3 and moving along the passage path P formed on the upper surface of the transmission cover 33 so as to get over the mower 1. A guide plate 43 along the passage path P is integrally provided on the transmission cover 33. A lawn mower in which a link support bracket 37 for connecting the lower end side of the mower link 36 for connecting the mower 1 to the traveling vehicle body 2 and a link pin 38 for connection are located on the opposite side of the front wheel 10 with the plate 43 in between. A working machine.

A guide plate 43 is provided along the passage path P to guide the tire when the front wheel 10 gets over the transmission cover 33 or the mower deck 3.
The invention according to claim 2 is the lawn mower according to claim 1 in which a fulcrum bracket 40 is provided at the left and right rear ends of the moor deck 3, and the riding-over plate 41 is locked to the fulcrum bracket 40. The front wheel 10 rides on the ride-over plate 41 and gets over the mower deck 4 or the transmission cover 33.

  According to the third aspect of the present invention, on the lower surface of the front and rear sides of the moor deck 3, an overpass plate 41A including an upper extension portion 41Aa, an intermediate portion 41Ab, and a lower extension portion 41Ac is provided at an extended position of the passage path P of the front wheel 10. The lawn mower according to claim 1, further comprising a plate support structure (47) that supports the passenger plate (41A) so as to swing back and forth.

  When the front wheel 10 reaches the lower extension 41Ac of the passenger plate 41A, the intermediate part 41Ab of the passenger plate 41A is slightly raised and waits for the front wheel to ride, and when the front wheel 10 rides on this intermediate part 41Ab, the passenger plate 41A slightly tilts forward with the grounding portion of the plate support structure 47 as a fulcrum, and as a result, the upper extension portion 41Aa contacts the upper surface of the rear end of the moor deck 3 and guides the front wheel 10.

  In the fourth aspect of the present invention, the front and rear plates 50 including the plurality of plate members 50a to 50c connected in series via the connecting pins 51, 51,. The lawnmower according to claim 1, wherein the lawn mower is connected so as to be capable of rotating in a reverse direction.

  By arranging the plurality of plate members 50a to 50c in a connected state on the overpassing path of the front wheel 10, the front wheel 10 rides on the mower deck 3 from the ground and reaches the highest position in the overpassing path 50, that is, the plurality of plates Guidance is provided by connecting the members 50a to 50c. On the other hand, when removing the mower 1 in the abdomen of the traveling vehicle body 2, the passenger plate 50 is inverted and used.

  According to the first aspect of the present invention, since the guide plate 43 is provided along the passage path P, the transmission cover 33 can be reinforced, the tire of the front wheel 10 can be guided, and the front wheel 10 can carry the transmission cover 33 to the moor deck 3. When moving over, smooth movement can be ensured without interfering with the link pin 38.

In addition to the effect described in claim 1, the invention described in claim 2 allows the front wheel 10 to move smoothly over the ride-over plate 41 and through the transmission cover 33 to the front side of the mower deck 3.
In addition to the effect of the first aspect, the invention described in claim 3 comprises a plate support structure 47 on the ride-over plate 41A, and swings up to a certain degree in accordance with the riding of the front wheel and rises to a certain extent. Since the structure is provided so as to be in contact with the moor deck 3, the front wheels can smoothly get over the mower 1 without the front wheel being pushed out to the mower deck 3 when riding on the overpass plate 41A.

  In addition to the invention described in claim 1, the invention described in claim 4 includes a passenger plate 50, that is, a plurality of plate members 50 a to 50, that the front wheel 10 rides on the mower deck 3 from the ground and reaches the highest position in the overpass route. It can guide by the connection of 50c, reduces unevenness change, and makes it easy to get on. Moreover, it can be used by reversing and can be used for both attachment and removal of the mower 1.

Overall side view of lawn mower (A) Top view of mower, (B) Plan sectional view of link support bracket (A) Side view of the mower, (B) Side view showing the mounting state of the mower (A) Side view of mower showing another example of the overpass plate, (B) Front view showing various specific examples of the plate support structure, (C) Side view of the overpass plate Moor's plan view showing different examples of boarding plates (A) (B) (C) Side view of the mower showing the operation of the above-mentioned passenger plate (A) (B) Moore side view showing the effect of the inverted ride-over plate (A) Partial plan view of the mower showing the pass-over assist function, (B) Side view of the mower, (C) Enlarged side view

Embodiments of the present invention will be described with reference to the drawings.
In FIG. 1, the mower 1 is configured to cut the turf grass that is vegetated by rotating the blade around the vertical drive shaft, and the mower 1 is configured as a mid mower that is mounted on the abdomen of the traveling vehicle body 2. A grass collection outlet 5 is formed on the right side of the deck 3 of the mower 1.

  The vehicle body 2 includes front wheels 10 and 10, rear wheels 6 and 6, a steering handle 11 for steering the front wheels 10 and 10, a driver's seat 12, an engine 13, a floor 14, and the like. An output shaft (not shown) for taking out the power of the engine 13 is provided under the floor 14 in the front-rear direction. The power of the output shaft is a transmission case (not shown) in which a speed change transmission mechanism is built, and there is no hydraulic pressure. The rear wheels 6 and 6 are driven by appropriately shifting through a step transmission (not shown).

  Further, the universal joint shaft 16 is interlocked via the transmission case transmission mechanism, and the end of the universal joint shaft 16 is connected to the input shaft 17 of the mower 1 for rotational transmission. Then, the blade shafts 18a, 18b, 18c in the mower deck 3 are driven from the input shaft 17, and the blades 19a, 19b, 19c at the lower ends of the shafts 18a, 18b, 18c rotate reversely around the vertical axis to rotate the turf grass. This is a configuration for cutting.

  With respect to the mower 1, the rotation of the input shaft 17 enters the mower transmission case 20, a belt transmission pulley 31a is provided on the vertical axis in the transmission case 20, and between the transmission pulleys 31b and 31c disposed on the left and right side portions. The blade shafts 18a, 18b, and 18c are rotationally interlocked so as to be interlocked with the transmission pulleys. A pulley provided at the rear portion of the transmission case 20 is an idle pulley 24.

Next, the front wheel climbing configuration for the moor deck 3 will be described.
The mower deck 3 is configured to cover the upper surface with a deck main body 3a having a size for accommodating three blades, and on the upper surface of the deck main body 3a, pulleys 31a, 31b provided on the blade shafts 18a, 18b, 18c, The transmission belt 32 is stretched over 31c, and the blade shafts 18a, 18b, 18c and the blades 19a, 19b, 19c are rotationally interlocked in the same direction.

  A transmission cover 33 that covers the pulleys 31 a, 31 b, 31 c and the transmission belt 32 is divided into a central transmission cover 33 a and left and right transmission covers 33 b, 33 c, and a bracket 34 that stands on the upper surface of the mower deck 3 that covers the blade 19. , 34... And the open / close lock 35 are detachably connected. Of the transmission cover 33, the left and right transmission covers 33 b and 33 c cover the left and right pulleys 19 for the left and right blades 19, and the traveling direction in plan view with the belt 32 stretched and arranged. The distance between the front edge and the left and right rear edges of the rear surface in the advancing direction is formed so as to gradually shorten toward the left and right ends, the rear edge is formed on a vertically rising vertical surface, and the front side is formed on an inclined surface. Yes.

  On the upper surface of the mower deck 3, link support brackets 37 and 37 of the mower links 36 and 36 are erected on the rear surface of the transmission cover 33. The link support brackets 37 and 37 are formed in a U shape in a plan view so that the lower end side of the mower link 36 can be received, and through holes 37a and 37a having a common axis are formed in opposing wall surfaces, and the mower link 36 side is formed. A support hole 36a is provided, and the link pin 38 is inserted into the through holes 37a and 37a and the support hole 36a so that the mower link 36 is connected to the mower deck 3 so as to be rotatable in the front-rear direction. The spring 39 wound around the link pin 38 is arranged so that the link pin 38 is always urged toward the through holes 37a and 37a and the support hole 36a. The upper end of the mower link 36 is connected to the frame portion of the traveling vehicle body 2 as appropriate.

  A fulcrum bracket 40 fixed to the mower deck 3 by welding is formed at the left and right rear ends of the mower deck 3. A passenger plate 41 is locked to the fulcrum bracket 40. That is, the fulcrum bracket 40 is a rod-like body and is formed in a bowl shape and is fixed in a slightly raised state with respect to the moor deck 3, and a hook portion 41 a formed on the front side of the transit plate 41 with respect to the fulcrum bracket 40. Is attached. Reinforcing bent portions 41c are formed on the left and right sides of the intermediate portion 41b of the transit plate 41. Further, the extension 41d having an appropriate length on the lower end side of the transit plate 41 is bent at a gentle angle.

  The extended portion 41d restricts the degree of freedom of the passenger plate 41 and the moor deck 3 by stepping on the front wheel 10, and the front wheel 10 passes over the intermediate portion 41b of the passenger plate 41 and the right and left side transmission covers 33b and 33c of the transmission cover 33. You can move to the front side of the moor deck 3 through.

  As described above, the front wheel 10 gets over the mower deck 3 and the mower 1 is positioned on the abdomen, but the mower deck 3 part and the transmission cover 33 part in the range through which the front wheel 10 passes are made thicker. Alternatively, the reinforcing rib 42 is formed to withstand heavy loads. In addition, on the upper surfaces of the left and right side transmission covers 33b and 33b of the transmission cover 33, a guide plate 43 is erected on one side (the left and right inner sides in the illustrated example) of the passage paths P and P of the left and right front wheels 10 and 10, respectively. To do. The guide plate 43 is erected in the front-rear direction so that the rear end thereof reaches the rear upper end portion of the upper surface of the mower deck 3 and is moved close enough not to affect the insertion / extraction of the link pin 38 for connecting the mower link 36. The side transmission covers 33b and 33b are provided by means such as welding.

  For this reason, the tire of the front wheel 10 can be guided directly from the rear end of the mower deck 33, and when the front wheel 10 gets over the transmission cover 33 or mower deck 3, smooth movement without interfering with the link pin 38 is achieved. It can be secured.

  The transit plate 41 can be inverted from the hook part 41a to be positioned on the upper surface of the moor deck 3 or the transmission cover 33, and the moor deck 3 is fitted with a fastener such as a bolt in a notch 41d formed in the extension part 41c. It can be accommodated by connecting to the transmission cover 33.

  In addition, a front mower link 44 that forms a parallel link with the mower link 36 is provided between the mower 1 and the front portion of the traveling vehicle body, and the mower 1 can be moved up and down by a lifting mechanism (not shown). . Furthermore, gauge wheels 45 and 46 are disposed in the front and rear portions of the mower deck 3, and the lowermost position of the mower 1 can be set by changing and adjusting the relative height positions of the support arms 45a and 46b with respect to the mower deck 3. The cutting height can be adjusted.

Next, different examples of the transit plate configuration will be described.
In FIG. 4, the transit plate 41A includes an upper extension 41Aa, an intermediate part 41Ab, and a lower extension 41Ac. The upper extension 41Aa and the lower extension 41Ac are both bent with respect to the intermediate part 41Ab. Furthermore, a plate support structure 47 is formed on the lower surface, and the upper extension 41Aa is brought into contact with the mower deck 3 by moving the front plate 10A around the center of the ground by the plate support structure 47 as the front wheel 10 is climbed. The configuration is to let Specifically, the plate support structure 47 is made of an L-shaped plate member and is fixed to the back surface of the passenger plate 41Ab (FIG. 4A). The angle formed in the L-shape is slightly sharper than vertical.

  When the front wheel 10 reaches the lower extension 41Ac of the passenger plate 41A, the intermediate part 41Ab of the passenger plate 41A is slightly raised and waits for the front wheel to ride. When the front wheel 10 rides on this intermediate part 41Ab, 41A is slightly tilted forward with the bent portion (grounding portion) of the L-shaped plate of the plate support structure 47 as a fulcrum, and as a result, the upper extension portion 41Aa is in contact with the upper surface of the rear end of the mower deck 3 and smoothly rides on the front wheel 10 Can be done.

  As described above, the plate support structure 47 is formed on the ride-over plate 41A, and is configured to come into contact with the moor deck 3 after swinging to a predetermined degree according to the ride of the front wheel and rising to a certain degree of slope. When riding on the plate 41 </ b> A, the front wheels can eliminate the pushing phenomenon with respect to the mower deck 3, and the front wheels can smoothly get over the mower 1.

  In the above embodiment, an L-shaped bent structure is used as the plate support structure 47. However, it is sufficient if the passenger plate 41A is swung. As shown in FIG. It is better to adopt a configuration that bites in, and a single plate shape may be used as long as it can be supported (FIG. 4C).

  Next, another example of the passenger plate will be described with reference to FIGS. The pass-over plate 50 includes a plurality of plate members 50a to 50c connected in series via connecting pins 51, 51,... So that they can be refracted from each other, and an extension plate 52 that is refractably connected to the lower plate member 50c. The plate member 50a at the upper end is connected to the upper surface of the transmission cover 33b by a support pin 53. The connecting pins 51, 51... And the support pins 53 are all horizontally oriented, and the plate members 50 a to 50 c and the extension plate 52 can be rotated individually or integrally, particularly around the support pins 53. By rotating, the series of plate members 50a to 50c and the extension plate 52 can be reversed and changed in the front-rear direction.

  When the mower 1 is mounted on the abdomen of the traveling vehicle body 2, the traveling vehicle body is slowly advanced from the rear side with respect to the mower 1 grounded to the front of the traveling vehicle body 1 (FIG. 6A). At this time, by arranging the plurality of plate members 50a to 50c in the connected state on the overpassing path of the front wheel 10, the front wheel 10 rides on the mower deck 3 from the ground and reaches the highest position in the overpassing path 50, i.e. It can be guided by connecting a plurality of plate members 50a to 50c, reduces unevenness changes, and facilitates riding. It is possible to descend directly along the mower deck 3 and the transmission cover 33 portion on the downside of the moor 1 boarding path without requiring separate plate members and to contact the front side of the mower deck 3.

  On the other hand, when the mower 1 at the abdomen of the traveling vehicle body 2 is removed, the passenger plate 50 is inverted as described above (FIG. 7A), and the mower link before and after connecting the traveling vehicle body 2 and the mower 1 is connected. 36 and 44 are removed. When the traveling vehicle body 2 is moved backward in this state, the front wheel 10 rides on the mower deck 3 by stepping on the back surface of the overpass plate 50 that is reversely positioned near the front side of the mower deck 3 in the overpass route. When the vehicle reaches the top, the front wheel 10 moves straight and retreats as it is, and there is no stepping plate 50, but it moves on the upper surface of the appropriately reinforced transmission cover 33 or mower deck 3 and reaches the ground (FIG. 7B). As a result, the traveling vehicle body 2 is positioned behind the mower 1 and the removal of the mower 1 is completed.

  The plurality of plate members 50a to 50c of the transit plate 50 form left and right upright edges for reinforcement, and one of the left and right upright edges of one plate member (the plate member 50c in the illustrated example) has a locking hole. , And the folded boarding plate 50 is fixed to a fixing bracket 56 protruding from the upper surface of the moor deck 3 with a detachable pin 55 so that it can be folded and fixed. In addition, the plate member 50a and the plate member 50b are folded and folded so that the extension plate 52 and the plate member 50c are overlapped, so that the front-rear length when not acting is shortened (FIG. 6C).

Based on FIG. 8, the auxiliary function of getting on the front wheel will be described.
In the above-described example, the easy climbing of the front wheel 10 has been described. However, the example illustrated in FIG. 10 relates to a unit that regulates the displacement movement of the moor deck 3. When the front wheel 10 gets over the mower deck 3, there is a case where the thrust due to the movement of the front wheel 10 acts on the mower deck 3 at the moment when the front wheel 10 contacts the mower deck 3 and the mower deck 3 can be displaced. In order to eliminate such disadvantages, a rearward-facing bracket 57 is provided at the rear part of the mower deck 3, and a regulating body 58 having a ground entry edge 58a formed on the lower end side is mounted in the bracket 57 in the vertical direction. When the front wheel 10 rides on the mower deck 3 from the ground, the restricting body 58 is stepped on the mower deck 3 and the front ground entry edge 58a bites into the ground. Even if thrust acts, the movement of the mower deck 3 can be restricted. For this reason, the front wheel 10 can smoothly ride on the mower deck 3 and cross the mower 1. In addition, it is a structure which can be fixed to the bracket 57 by a fulcrum pin 59 of the restricting body 58 and a fixing pin 60 which can be inserted and removed (solid line in the figure). By fixing with (virtual line in FIG. 8C), it can be held even during lawn mowing work, and there is no risk of loss or the like.

  Further, when the collar portion 58b is formed in the middle of the regulating body 58 (FIG. 8C), it prevents biting beyond a certain level and maintains a good biting state without forcibly pushing down the moor deck 3 even in relatively soft ground. To do.

DESCRIPTION OF SYMBOLS 1 Moore 2 Traveling vehicle body 3 Moore deck 6 Rear wheel 10 Front wheel 33 Transmission cover 36 Moore link 37 Link support bracket 38 Link pin 41 Passing plate 41A Passing plate 43 Guide plate 47 Plate support structure 50 Passing plate 51 Connecting pin P Passing path

Claims (4)

In a lawn mower that detachably mounts a mower (1) between a front wheel (10) and a rear wheel (6) of a traveling vehicle body (2), a transmission cover (33) is provided on the upper surface of the mower deck (3). (10) moves along the passage path (P) formed on the upper surface of the mower deck (3) and the transmission cover (33), so that the mower (1) is moved over, and the transmission cover (33) passes this passage. A guide plate (43) along the route (P) is integrally provided, and the mower (1) is connected to the traveling vehicle body (2) on the opposite side of the front wheel (10) with the guide plate (43) interposed therebetween. A lawn mower having a link support bracket (37) and a link pin (38) for connecting the lower end side of the mower link (36).
In the fourth aspect of the present invention, the front and rear plates 50 including the plurality of plate members 50a to 50c connected in series via the connecting pins 51, 51,. The lawnmower according to claim 1, wherein the lawn mower is connected so as to be able to rotate and rotate. A guide plate (43) is provided along the passage route (P) to guide the tire when the front wheel (10) gets over the transmission cover (33) or the mower deck (3).
According to a second aspect of the present invention, there is provided a fulcrum bracket (40) at the left and right rear ends of the mower deck (3), and the cradle bracket (40) is engaged with a passenger plate (41). Lawn mower.   Passing plate (41A) comprising an upper extension portion (41Aa), an intermediate portion (41Ab), and a lower extension portion (41Ac) at the extended position of the passage route (P) of the front wheel (10) on the front and rear sides of the mower deck (3) The lawn mower according to claim 1, further comprising a plate support structure (47) for supporting the ride-over plate (41A) so as to be swingable back and forth. A pass-over plate (50) having a plurality of plate members (50a to 50c) connected in series via connecting pins (51, 51...) So as to be refractable with respect to each other is reversed to the upper surface of the transmission cover (33). The lawnmower according to claim 1, which is rotatably connected.

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