JP2006345823A - Grass mower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a grass mower which can prevent the flexure of a body cover disposed on a vehicle body and can ensure stability, when an operator rides. <P>SOLUTION: Bushes are disposed at positions for supporting a step 254 in a body cover 20 and a vehicle body 10, and a hook-like portion and a C-shaped member which are engaged with each other are disposed between the bushes. Therefore, even when an operator rides on the grass mower to give a large load to the step 254, too large force does not act on the hook-like portion and the C-shaped member, and the hook-like portion is not disengaged from the C-shaped member. Hence, although the body cover 20 has a structure in which the body cover 20 integrally formed to cover the approximately whole vehicle body 10 is adopted in a state that the body cover can freely closes or opens the vehicle body 10, the body cover 20 is hardly bent on riding, and the flotation of the step 254 from the opposite side to be stepped can be prevented. Thus, the stability of the grass mower on riding can be ensured. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mower.

Conventionally, in order to cut weeds, undergrowths, turf, etc. in orchards, mountain forests, gardens, parks, etc., equipped with cutting blades, engines, seats, handles, etc., it is possible to run wheels while driving the cutting blades with the engine, Riding lawn mowers (including lawn mowers) are used.
Some of these mowers are covered with an integrally molded body cover around the engine, around the seat, and around the handle shaft (for example, Patent Document 1).

Japanese Patent Laid-Open No. 5-76228 (FIGS. 1 and 3)

However, as is the case with Patent Document 1, the body cover is often integrally formed of a synthetic resin or the like, and tends to bend due to a load when it is stepped on when riding. That is, when trying to get into the seat from one side of the vehicle body, the body cover lifts from the vehicle body on the opposite side, which is inconvenient to get on.
In particular, when the body cover covers a wide range of the vehicle body and is openable and closable with respect to the vehicle body, such a problem becomes particularly prominent because the body cover cannot be permanently fixed to the vehicle body.

  Here, an object of the present invention is to provide a mower that can prevent the body cover provided on the vehicle body from being bent and can ensure the stability during riding.

  A mower according to a first aspect of the present invention is a riding mower whose traveling direction is variable by a handle operation, and has a handle cover that covers a handle shaft connected to the handle and covers the entire vehicle body. The body cover is openable and closable around a rotation shaft provided in the vicinity of the handle shaft, and the vehicle body is mounted at a position corresponding to the steps on both sides of the body cover. A plate-like member is provided along the width direction, and projections that are fulcrums for supporting the step are provided at both ends of the plate-like member, respectively, and the body cover side engagement is provided between these projections. An engaged portion that engages with the mating portion is provided.

  The mower according to claim 2 of the present invention is characterized in that the protrusion is a rubber bush.

  A mower according to a third aspect of the present invention is a riding mower whose traveling direction is variable by a handle operation, and has a handle cover that covers a handle shaft connected to the handle and covers the entire vehicle body. The body cover is integrally openable and closable around a rotation shaft provided in the vicinity of the handle shaft, and the vehicle body engages with an engagement portion on the body cover side. Engaged portions are provided, and the engaged portions and the engaged portions are provided on both sides in the vehicle width direction corresponding to the position of the step of the body cover.

  According to a fourth aspect of the present invention, in the mower according to the present invention, the body cover is provided with a reinforcing frame, and the frame is provided with a shaft that is rotatably supported. Are provided with levers operated from the outside of the body cover, the engaging portions are provided at both ends of the shaft, respectively, and the engagement with the engaged portions is released by the operation of the levers. Features.

  According to the mower according to the first aspect, the projections are respectively provided at both ends of the plate-like member provided along the vehicle width direction at the position corresponding to the step of the body cover, and the covering is provided between these projections. By providing the engaging portion, when a step on one side is depressed from the side of the vehicle body, the protrusion functions as a fulcrum of the step, and in the moment of force, the load is larger than the load in the depressed step. The load acting on the engaging portion and the engaging portion, or the load acting on the opposite step can be reduced. For this reason, the body cover is firmly locked to the vehicle body without disengaging the engaging portion and the engaged portion, and thus an integrally formed body cover that covers the entire vehicle body is employed, and the body cover is The body cover can be prevented from being bent by a load such as when getting on, although it is structured to be rotatable with respect to the vehicle body so as to be freely opened and closed. That is, since the body cover is prevented from being lifted on the side opposite to the side receiving the load, it is possible to ensure the stability during riding. Moreover, impact resistance can also be improved.

  In addition, since the body cover rotates and stands up with respect to the vehicle body, the upper surface of the vehicle body is opened, so that the mowing grass collected between the deck covering the cutting blade and the body cover, cleaning the engine, etc. Can be carried out easily, and the maintainability can be dramatically improved.

  According to the mower according to the second aspect, since the material of the protrusion is rubber, the impact when the step of the body cover is stepped on is absorbed, and it is possible to get on quietly.

According to the mower according to claim 3, since the engaging portion on the body cover side and the engaged portion on the vehicle body side are provided on both sides in the vehicle width direction corresponding to the position of the step of the body cover, Even though it is a structure that uses an integrally formed body cover that covers the entire vehicle body, and the body cover rotates with respect to the vehicle body and can be opened and closed, the body cover and the vehicle body are firmly And it is fixed with good balance.
This makes it difficult for the body cover to bend even when a load is applied, such as when the step of the body cover is stepped on, and prevents the body cover from being lifted on the side opposite to the side receiving the load, thus ensuring stability during riding. Moreover, impact resistance can also be improved.

  According to the mower according to claim 4, the engaging portion is engaged with the engaged portion by rotating the shaft in a predetermined direction by lever operation, and the shaft is rotated in the reverse direction by lever operation. By doing so, the engagement is released, so that the handleability can be improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Appearance structure of mower]
FIG. 1 is an external view of a mower 1.
The mower 1 includes a vehicle body 10 on which an engine 15 and a cutting blade are mounted, and a body cover 20 that covers substantially the entire vehicle body 10, and is configured to be able to travel with a pair of front wheels 110 and a pair of rear wheels 120. Type. That is, it is possible to run by sitting on a seat seat 21 integrally assembled in the approximate center of the body cover 20 and depressing the travel pedal 18 and to change the direction by operating the handle 17.

[Description of the car body]
First, the internal structure of the vehicle body 10 will be briefly described.
FIG. 2 shows the vehicle body 10 with the body cover 20 removed.
The vehicle body 10 includes a vehicle body frame 13, an engine 15 provided behind the vehicle body frame 13 (on the right side in FIG. 2), and a rotary cutting blade driven by the engine 15 while being covered with the cutting blade deck 19. A hydraulic transmission (HST: Hydrostatic transmission) (not shown) provided below the engine 15 is provided.

The body frame 13 is formed by bending a pipe member 131. A plate 133 provided in front of the body frame 13 is provided with a bracket 133 having a hole 133A penetrating in the vehicle width direction.
A cutting blade raising / lowering lever 156 for raising and lowering the cutting blade is provided on the right side of the vehicle body frame 13, and a traveling transmission lever 157 relating to a shift operation of the transmission is provided on the left side.
In addition, a plate-like member 137 is installed on the vehicle body frames 13 on both sides, and hard rubber or metal bushes 138 are provided at both ends of the plate-like member 137, respectively.

The engine 15 is an air-cooled single-cylinder two-cycle or four-cycle engine, and a fuel tank 153, an engine starter battery 154, and the like are provided around the engine 15.
The output shaft of the engine 15 projects downward. The output shaft is provided with two pulleys (not shown), and is arranged on one pulley and the cutting blade deck 19 and fixed to the rotating shaft of the cutting blade. A belt 152 is wound around the pulley 151, and a belt is also wound around the other pulley and a pulley fixed to an input shaft of a transmission (not shown). As a result, the driving force of the engine 15 is transmitted to both the cutting blade and the transmission.

[Description of body cover]
Returning to FIG. 1, the body cover 20 will be described.
The body cover 20 is an integrally formed product of a cover body 22 and a handle cover 23, and is formed so as to protrude from the small-diameter front wheel 110 side to the large-diameter rear wheel 120 side.
In the cover main body 22 of the body cover 20, a floor 25 is configured up to the front side of the seat 21 and the portion provided with the bumper portion 24. A pair of footrests for occupants are placed on the front side of the floor 25. A foot portion 251 is formed. Further, the both sides of the floor 25 are flat steps 254 for putting a foot on when getting on the seat 21.

A recess 26 (see also FIG. 3) in which the seat 21 is disposed is formed in the approximate center of the cover body 22, and the cover body 22 is formed on the backrest 212 of the seat 21 at the rear side of the recess 26. It is formed to follow the curve.
A fuel supply opening 27 for supplying fuel oil to the fuel tank 153 is formed at the rear end of the cover body 22.

The handle cover 23 is attached to the cover body 22 in front of the floor 25 on the front side of the handle shaft 16 provided on the handle 17. An insertion hole 253 through which the handle shaft 16 is inserted is formed at the upper end of the handle cover 23.
The handle cover 23 is provided with an adjustment dial 155 for adjusting the rotational speed of the engine 15.

  The cover main body 22 and the handle cover 23 have a metal frame 40 extending from the front to the rear following the curved shape of the cover main body 22 and the handle shaft 16 as shown by a solid line in FIG. A handle frame 48 extending in the direction is provided.

  The handle frame 48 is a pipe member that is bent at the upper end side of the handle cover 23 and extends along both sides in front of the handle shaft 16, and is bolted to the frame 40 at a base end portion 481 that is bent along the frame 40. Yes. Further, stays 482 having bolt insertion holes are installed at two locations on the front side of the handle frame 48, and the handle cover 23 is bolted to the stays 482.

The frame 40 is bent at the front side and extends along both sides of the seat seat 21, a plate 44 that extends outward in the vehicle width direction and supports the step 254 of the body cover 20, and the seat seat 21. The seat plate portion 45 that supports the seat surface portion 211 and the back plate portion 46 that is installed on both ends of the pipe member 43 at the position of the backrest portion 212 are configured. The frame 40 is bolted to the back side of the cover body 22 at an appropriate position.
In the frame 40, a pair of U-shaped attachment portions 41 are attached to positions corresponding to both sides of the rising portion of the handle cover 23, and a latch mechanism 47 is provided on the front side of the seat plate portion 45. It has been.

The attachment portion 41 is rotatably attached to a bracket 133 (FIG. 2) provided on the vehicle body frame 13.
That is, when a shaft-like member 411 such as a bolt or a pin is inserted into the hole 133A of the bracket 133 and the mounting portion 41, the body cover is used as shown in FIGS. It is possible to tilt up (open and close) 20 to the front side with respect to the vehicle body 10. As a result, the body cover 20 stands up with respect to the vehicle body 10 and the upper surface of the vehicle body 10 is largely opened. Therefore, cleaning of cut grass, inspection and maintenance of the engine 15 can be easily performed.

  On the other hand, the latch mechanism 47 includes a shaft 471 installed on the pipe member 43, a shaft support portion 472 that rotatably supports both ends of the shaft 471, and a hook-like portion 473 bent at one end side into a substantially L shape. And a lever 474 protruding from the opening 29 formed in the body cover 20.

FIG. 6 shows the latch mechanism 47 and the plate member 137 installed on the frame 40. As shown in the figure, the body cover 20 is locked to the vehicle body 10 by engaging the hook-shaped portion 473 with the C-shaped member 136 provided on the plate-like member 137.
When the body cover 20 is tilted, the hook-shaped portion 473 may be removed from the C-shaped member 136 by pulling up the lever 474.

  Here, in a state where the body cover 20 is locked to the vehicle body 10, as schematically shown in FIG. 7, the bush 138 provided on the plate-like member 137 serves as a fulcrum for supporting the plate 44. The bush 138 supports the plate 44 outside the center of the plate 44 (FIG. 6), and the distance D1 from the bush 138 to the C-shaped member 136 with which the hook-shaped portion 473 is engaged is from the bush 138 to the plate 44. It is larger than the distance D2 to the edge. For this reason, even when the step 254 (FIG. 1) on one side is stepped on and the plate 44 tilts when getting on from the side of the vehicle body 10, the C is compared with the load applied to the end portion outside the plate 44 in the moment of force. The load applied to the character-shaped member 136 and the hook-shaped portion 473 is small. Accordingly, even when a heavy load is applied when the vehicle is ridden vigorously, the hook-shaped portion 473 and the C-shaped member 136 do not come off, and the bending of the body cover 20 is prevented by the hook-shaped portion 473 and the C-shaped member 136. Therefore, it is possible to prevent the body cover 20 from being lifted at the step 254 on the side opposite to the boarding side.

By the way, in this embodiment, as shown in FIG. 5, the handle shaft 16 is bent (broken) as the body cover 20 is tilted.
Here, the handle shaft 16 is attached to the gear box 119 via a universal joint 161, as shown in FIG.
The universal joint 161 has a rotation shaft 161A along the vehicle width direction, and the handle shaft 16 is refracted around the rotation shaft 161A.

  Then, inside the insertion hole 253 through which the handle shaft 16 is inserted into the body cover 20, as shown in FIG. 8, a spherical bearing (shelical bush) 255 is provided with a cylindrical body 253A interposed therebetween. When the 16 is refracted, the handle shaft 16 is slidably and swingably held by the spherical bearing 255.

The spherical bearing 255 has an inner guide 255A whose outer peripheral surface is a convex spherical surface, and an outer guide 255B whose inner peripheral surface which is a concave spherical surface faces and contacts the outer peripheral surface of the inner guide 255A, and has a cylindrical body 253A. It is held between a bottom portion 253B and a ring 253C formed inside.
Since the spherical bearing 255 follows the attitude of the handle shaft 16 and stably holds the handle shaft 16 so as to be slidable and swingable, when the body cover 20 is tilted, Even if the rotation trajectory of the body cover 20 is deviated, the deviation can be absorbed by the movement between the guides 255A and 255B of the spherical bearing and the sliding and swinging of the handle shaft 16 with respect to the inner guide 255A. The handle shaft 16 can be opened and closed without being restricted.
Since the handle cover 23 is reinforced by the handle frame 48, rattling when the body cover 20 is tilted can be prevented.

According to the mower 1 of this embodiment demonstrated above, there exist the following effects.
That is, the C-shaped member 136 and the bush 138 are provided on the plate-like member 137 provided along the vehicle width direction, and when the step 254 is stepped on when riding, the fulcrum of the plate 44 provided below the step 254 Since the bush 138 functions and the load applied to the C-shaped member 136 and the hook-shaped portion 473 can be reduced compared to the magnitude of the load when the bush 138 is depressed, the C-shaped member 136 and the hook-shaped portion 473 are reduced. The body cover 20 is firmly locked to the vehicle body 10 without being disengaged. For this reason, the body cover 20 formed integrally is adopted, and the body cover 20 can be freely opened and closed with respect to the vehicle body 10 so that the vehicle body frame 13 and the frame 40 on the body cover 20 side are separated. Regardless of the structure, the body cover 20 is less likely to be bent by the load applied to the step 254 when it gets into the seat seat 21 vigorously, and the stability at the time of riding can be secured and the impact resistance can be improved. Can do.

  Further, the lever 474 is tilted and the shaft 471 is rotated in a predetermined direction so that the hook-shaped portion 473 is engaged with the pin 135, and conversely, the lever 474 is pulled up and the shaft 471 is rotated in the reverse direction. Since the engagement is released, the handleability can be improved.

Although the best configuration, method and the like for carrying out the present invention have been disclosed in the above description, the present invention is not limited to this. That is, the invention has been illustrated and described primarily with respect to particular embodiments, but may be configured for the above-described embodiments without departing from the scope and spirit of the invention. Various modifications and improvements can be made by those skilled in the art in terms of materials, quantity, and other detailed configurations.
The description limiting the shape, material, etc. 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 removes a part or all of the limitation is included in the present invention.

9-11 has shown the mower 2 in the modification of this invention.
FIG. 9 is an external view of the mower 2, and FIG. 10 is a diagram illustrating the internal structure of the vehicle body 10. FIG. 11 is a perspective view of the body cover 28.
In the mower 1 (FIG. 1) in the above-described embodiment, the body cover 20 includes the cover body 22 and the handle cover 23. However, as in the present modification, the handle cover 252 and the cover body 22 are injected. It is also possible to employ the body cover 28 that is integrally formed by molding.

Further, this modification has a latch mechanism 49 as a structure for engaging the body cover 28 and the vehicle body 10 with each other.
As shown in FIG. 11, the latch mechanism 49 includes a shaft 471 installed on the pipe member 43, a shaft support portion 472 that rotatably supports both ends of the shaft 471, and a pair of shafts 471 provided at both ends. It has a flange-like member 493 and a lever 474 that is provided substantially at the center of the shaft 471 and protrudes from the opening 29 formed in the body cover 20.

  Then, the hooks 493 on both sides engage with the pins 135 (FIG. 10) provided on the vehicle body frame 13, whereby the body cover 28 is locked to the vehicle body frame 13. That is, since the body cover 28 is locked to the vehicle body frame 13 with good balance on both sides in the vehicle width direction, even if the step 254 on one side is stepped on when riding, it is possible to prevent lifting on the step 254 side on the opposite side.

  INDUSTRIAL APPLICABILITY The present invention can be used as a mower and can be configured as various work vehicles by transshipping a cutting blade to another work machine.

The perspective view of the mower in the embodiment of the present invention. The perspective view which shows the vehicle body in the said embodiment. The perspective view of the body cover in the said embodiment. The figure which shows the state which tilted up the body cover in the mower of the said embodiment. The side view which shows the tilting operation | movement of the body cover in the mower of the embodiment. The perspective view which shows the structure which aims at prevention of the bending of the body cover in the said embodiment. The schematic diagram for demonstrating the effect | action about prevention of bending of the body cover in the said embodiment. Sectional drawing which shows the spherical bearing in the said embodiment. The perspective view of the mower in the modification of this invention. The perspective view which shows the vehicle body in the said modification. The perspective view of the body cover in the said modification.

Explanation of symbols

1, 2 ... lawn mower, 10 ... vehicle body, 16 ... handle shaft, 17 ... handle, 20, 28 ... body cover, 23 ... handle cover, 40 ... frame, 135 ... Pin (engaged part), 136 ... C-shaped member (engaged part), 137 ... Plate-like member, 138 ... Bush (projection), 254 ... Step, 411 ... shaft-like member (rotating shaft), 471 ... shaft, 473 ... hook-like part (engagement part), 493 ... hook-like member (engagement part), lever ... 474.

Claims (4)

A riding-type mower whose traveling direction can be changed by operating the steering wheel,
A body cover integrally formed so as to cover the entire vehicle body having a handle cover that covers the handle shaft connected to the handle;
The body cover is freely openable and closable around a rotation shaft provided in the vicinity of the handle shaft,
The vehicle body is provided with plate-like members along the vehicle width direction at positions corresponding to the steps on both sides of the body cover,
At both ends of the plate-like member, protrusions that are fulcrums for supporting the step are provided, and between these protrusions, an engaged portion that engages with the engagement portion on the body cover side is provided. A mower characterized by The mower according to claim 1,
The mowing machine is characterized in that the protrusion is a rubber bush. A riding-type mower whose traveling direction can be changed by operating the steering wheel,
A body cover integrally formed so as to cover the entire vehicle body having a handle cover that covers the handle shaft connected to the handle;
The body cover is freely openable and closable around a rotation shaft provided in the vicinity of the handle shaft,
The vehicle body is provided with an engaged portion that engages with the engagement portion on the body cover side,
The mowing machine is characterized in that the engaging part and the engaged part are provided on both sides in the vehicle width direction corresponding to the step position of the body cover. The mower according to claim 3,
The body cover is provided with a reinforcing frame,
The frame is provided with a shaft that is rotatably supported,
A lever operated from the outside of the body cover is provided in the axial direction of the shaft,
The said engaging part is provided in the both ends of the said shaft, respectively, The engagement with the said to-be-engaged part is cancelled | released by operation of the said lever.

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