JP6910815B2 - Riding mower - Google Patents

Description

The present invention is a self-propelled body equipped with a passenger-type mower, specifically, front wheels and rear wheels, and having a pair of left and right body frames facing the front and rear of the vehicle body arranged at intervals in the width direction of the vehicle body at the rear portion of the vehicle body. The present invention relates to a riding-type mower provided between the front and rear wheels of the self-propelled vehicle body, which includes a mowing device for cutting grass and discharging the mowed grass rearward of the self-propelled vehicle body to drop it on the ground.

The above-mentioned riding type mower is for mowing work while discharging the mowed grass by the mowing device to the mowing trace. As a riding type mower of this type, for example, there is one shown in Patent Document 1. In the one shown in Patent Document 1, a self-propelled vehicle body having front wheels and rear wheels is provided, and a bar blade type mower is provided between the front and rear wheels of the self-propelled vehicle body. The mower is configured in a rear discharge format.

Japanese Patent No. 5421884

Conventionally, the mowed grass discharged from the mowing device and soared easily enters between the left and right body frames. If the cut grass gets in between the vehicle body frames, the cut grass adheres to or accumulates on various devices, causing malfunction of various devices.

The present invention provides a riding-type mower that can prevent the mowing grass from getting between the vehicle body frames.

The riding type mower according to the present invention
A self-propelled vehicle body equipped with front and rear wheels and having a pair of left and right vehicle body frames facing the front and rear of the vehicle body arranged at intervals in the vehicle body width direction at the rear of the vehicle body.
A mowing device provided between the front and rear wheels of the self-propelled vehicle body to mow the grass and discharge the mowed grass toward the rear of the self-propelled vehicle body to drop it on the ground.
A cover provided on the bottom of the self-propelled vehicle body so as to cover the upper part of the mowing grass discharge path on the rear side of the grass cutting device and close between the pair of left and right vehicle body frames.
A support bar that connects the left and right body frames is provided.
The cover is received and supported from below by the support bar between the pair of left and right vehicle body frames.

According to this configuration, the cover prevents the mowed grass discharged from the mowing device from entering between the vehicle body frames even if it soars up. In addition, the cover can be received and supported from below by a support bar between the pair of left and right vehicle body frames.

Therefore, it is possible to prevent the cut grass from getting between the vehicle body frames. As a result, malfunction of various devices due to mowing is less likely to occur, and mowing work can be performed efficiently.

In the present invention, it is preferable that the cover is inserted between the lower ends of the pair of left and right body frames.

According to this configuration, since the vehicle body frame and the cover are easily brought into close contact with each other, it is easy to seal between the vehicle body frame and the cover.

In the present invention, it is preferable that the engine is supported by the pair of left and right body frames behind the mowing device.

According to this configuration, it is possible to prevent the cut grass from adhering to the engine even if it soars.

It is a left side view which shows the whole of a riding type mower. It is a left side view which shows the cover of 1st Embodiment. There is a bottom view which shows the cover of 1st Embodiment. It is a rear view which shows the cover of 1st Embodiment. It is a left side view which shows the cover of 2nd Embodiment. It is a bottom view which shows the cover of 2nd Embodiment. It is a rear view which shows the cover of 2nd Embodiment.

[First Embodiment]
Hereinafter, embodiments of the riding-type mower according to the present invention will be described with reference to the drawings. The direction of [F] shown in FIG. 1 is the front direction of the self-propelled vehicle body 1, the direction of [B] is the rear direction of the self-propelled vehicle body 1, the direction of the front side of the paper is the left direction of the self-propelled vehicle body 1, and the back side of the paper surface. Is defined as the right direction of the self-propelled vehicle body 1.

[Overall configuration of riding mower]
As shown in FIG. 1, the passenger-type mower includes a self-propelled vehicle body 1 equipped with a pair of left and right front wheels 2 and a pair of left and right rear wheels 3. The driving unit 4 is formed from the front end portion to the central portion of the self-propelled vehicle body 1. The driving unit 4 is provided with a driving step 5, a driver's seat 6, and a pair of left and right control levers 7. A driving portion 8 is formed at the rear portion of the self-propelled vehicle body 1. The driving unit 8 is provided with an engine 9, a radiator for cooling the engine (not shown), and an engine bonnet 10. The pair of left and right front wheels 2 are composed of caster-type idle wheels. The power of the engine 9 is input to a pair of hydrostatic continuously variable transmissions (not shown), and the outputs of the pair of continuously variable transmissions are separately transmitted to the pair of rear wheels 3. The self-propelled vehicle body 1 can be driven straight by operating the pair of stepless transmissions separately by the pair of left and right control levers 7 and driving the pair of left and right rear wheels 3 at the same speed in the same rotation direction. By driving the pair of left and right rear wheels 3 at different speeds and different rotation directions, the self-propelled vehicle body 1 can be steered to the left or right.

A mowing device 11 is provided between the front and rear wheels of the self-propelled vehicle body 1. The mowing device 11 is supported by the vehicle body frame 12 of the self-propelled vehicle body 1 via a link mechanism 13. By raising and lowering the link mechanism 13 with the raising and lowering lever 13a, the mowing device 11 can be raised and lowered between the lowering work state in which the gauge wheel 14 is in contact with the ground and the ascending non-working state in which the gauge wheel 14 is raised from the ground.

In this riding-type mower, the mowing device 11 is lowered to a descending work state, and the self-propelled vehicle body 1 is driven in this state to cut the grass in front of the self-propelled vehicle by the mowing device 11. This is a mowing operation in which the mowed grass is discharged to the mowing traces.

[Structure of mowing device 11]
As shown in FIGS. 1, 2 and 3, the mowing device 11 includes a housing 15. An outlet 16 is formed at the rear of the housing 15. Inside the housing 15, three blade-type cutting blades 17 arranged in the width direction of the self-propelled vehicle body 1 are provided. Each cutting blade 17 is rotatably supported by the housing 15 via a rotary support shaft 18. A drive unit 19 is provided on the upper surface side of the housing 15.

In the mowing device 11, the power of the engine 9 is transmitted to the drive unit 19, so that the rotary support shaft 18 of each cutting blade 17 is rotationally driven by the drive unit 19, and each cutting blade 17 is the vehicle body of the rotary support shaft 18. It is rotationally driven with the vertical axis as the center of rotation. Each rotating cutting blade 17 cuts grass such as lawn. The mowed grass generated by mowing is discharged from the discharge port 16 toward the rear of the self-propelled vehicle body 1 by the transport wind generated by the rotation of each mowing blade 17. The discharged cut grass falls to the ground due to gravity.

[Structure of self-propelled vehicle body 1]
As shown in FIGS. 1, 2, 3 and 4, the vehicle body frame 12 of the self-propelled vehicle body 1 includes a pair of left and right vehicle body frames 20 (front-rear front portion) provided at the front portion of the self-propelled vehicle body 1. Hereinafter referred to as a front vehicle body frame 20) and a pair of left and right vehicle body frames 21 for the front and rear facing the vehicle body provided at the rear of the self-propelled vehicle body 1 (hereinafter referred to as a rear vehicle body frame 21). Is provided. The rear body frame 21 corresponds to the body frame according to the present invention.

As shown in FIGS. 3 and 4, the pair of left and right front body frames 20 and the pair of left and right rear body frames 21 are arranged at intervals in the width direction of the vehicle body. The pair of left and right rear body frames 21 are composed of vertical plate members. A pair of left and right front body frames 20 and a pair of left and right rear body frames 21 are connected to each other. The central portion of the pair of left and right rear body frames 21 is connected by a middle connecting frame 21b in the vehicle body width direction. A pair of left and right rear body frames 21 are connected by a rear connecting frame 21c in the width direction of the vehicle body.

As shown in FIGS. 2 and 4, the connecting member 22 is supported on both lateral sides of the front end of the vehicle body of the engine 9 and on both lateral sides of the rear end of the vehicle body of the engine 9. The front and rear connecting members 22 on the left lateral side of the engine 9 are supported by the support portion 21d on the left rear body frame 21 via the cushion material 23. The front and rear connecting members 22 on the right lateral side of the engine 9 are supported by the support portion 21d on the right rear body frame 21 via the cushion material 23. Each support portion 21d of the rear body frame 21 is formed on the inner surface side of the rear body frame 21. The engine 9 is supported by the left and right rear vehicle body frames 21 via a connecting member 22 and a cushion material 23 on the rear side of the mowing device 11.

As shown in FIGS. 2, 3 and 4, a cover 24 is provided on the bottom of the self-propelled vehicle body behind the mowing device 11. The space between the pair of left and right rear body frames 21 is closed by the cover 24. In the present embodiment, the space between the pair of left and right rear body frames 21 is closed by the cover 24 in the range from the portion near the rear side of the mowing device 11 of the rear body frame 21 to the rear end portion of the rear body frame 21. There is. The cover 24 prevents the mowed grass discharged from the mowing device 11 from entering between the pair of left and right rear body frames 21, and prevents the mowed grass from adhering to the engine 9 and peripheral devices of the engine 9.

As shown in FIGS. 2, 3 and 4, the cover 24 is provided in a fitted state in which the lower ends of the pair of left and right rear body frames 21 are inserted into each other. It is easy to bring the cover 24 and the rear body frame 21 into close contact with each other.

The cover 24 is made of a translucent resin plate member. As shown in FIGS. 2 and 3, the front end portion of the cover 24 is supported by the front connecting frame 21a. To support the cover 24 to the front connecting frame 21a, the front reinforcing plate 25 is applied to the outer surface side and the inner surface side of the front end portion of the cover 24, and the front end portion of the front reinforcing plate 25 on the outer surface side is connected to the front connecting frame 21a. It is done by tightening and connecting with bolts. The rear end portion of the cover 24 is supported by the rear body frame 21 inside the rear connecting frame 21c. The cover 24 is supported on the rear body frame 21 by a connecting member 33 attached to the inner surface side of the rear end portion of the cover 24 and a support member 34 provided on the rear body frame 21. The connecting member 33 is locked to the hook portion of the support member 34. A reinforcing member 26 is attached to the outer surface side of the cover 24. As shown in FIGS. 3 and 5, the outer surface side of the cover 24 in the central portion in the front-rear direction is received and supported by the support bar 28. The support bar 28 is connected to the left and right rear body frames 21. The cover 24 is supported by the rear body frame 21 via the front connecting frame 21a, the support bar 28, and the support member 34.

A notch hole 24a is formed in the central portion of the cover 24 in the front-rear direction. A reinforcing plate 29 is attached to a portion of the outer surface side and the inner surface side of the cover 24 located around the notch hole 24a. The lower end of the middle connecting frame 21b is inserted into the notch hole 24a.

In the present embodiment, the cover 24 is made of a resin plate member, but various members such as a metal plate member and a rubber plate member can be adopted as the members constituting the cover 24.

[Second Embodiment]
FIG. 5 is a left side view showing the cover 30 provided with the second implementation structure. FIG. 6 is a bottom view showing the cover 30 provided with the second implementation structure. FIG. 7 is a rear view showing the cover 30 provided with the second implementation structure. As shown in FIGS. 5, 6 and 7, in the cover 30 provided with another implementation structure, both lateral end portions 30a of the cover 30 are arranged in a state of protruding from the pair of left and right rear vehicle body frames 21 to the lateral outer side of the vehicle body. Has been done.

As shown in FIGS. 5 and 6, the front portion 30b of the cover 30 is supported by a portion of the housing 15 of the mowing device 11 above the discharge port 16. The rear end of the cover 30 is supported by the rear body frame 21 via a spring 35 on the lateral side of the vehicle body with respect to the rear body frame 21. A reinforcing member 26 is attached to the outer surface side of the portion where the spring 35 of the cover 30 is connected. When the mowing device 11 moves up and down, the front portion 30b of the cover 30 bends due to the flexibility of the rubber, and the entire cover 30 moves back and forth due to the expansion and contraction of the spring 35, so that the mowing device 11 and the cover It can be closed so that there is no gap between it and 30. In addition, the mowing device 11 can be raised and lowered with a light operation.

In the present embodiment, the entire cover 30 is made of a rubber plate so that the front portion 30b is made of a rubber plate, but the cover 30 is before being connected to the mowing device 11. Only the portion 30b may be composed of a rubber plate, and the portion of the cover 30 behind the front portion 30b may be composed of a non-flexible member such as a resin plate member or a metal plate member.

[Other Embodiments]
(1) In the first embodiment described above, an example is shown in which the cover 24 is not connected to the mowing device 11, but the front portion of the cover 24 is configured by a rubber plate as in the second embodiment. However, a configuration may be adopted in which the front portion is connected to the mowing device 11.

(2) In the above embodiment, the example in which the front wheel 2 is a caster type idle wheel is shown, but it may be configured as a steering type that is steered by the rotation operation of the steering wheel.

(3) In the above-described embodiment, the example in which the engine 9 is supported by the rear vehicle body frame 21 is shown, but the engine 9 may be provided in the front portion of the self-propelled vehicle body.

(4) In the above-described embodiment, an example is shown in which a grass cutting device for discharging the cut grass only in the rearward direction of the vehicle body is provided. A switchable mowing device can be adopted.

The present invention is not limited to the riding-type mower in which the mowed grass is discharged only toward the rear of the vehicle body, and can be switched between a state in which the mowed grass is discharged toward the rear of the vehicle body and a state in which the mowed grass is discharged laterally and outwardly of the vehicle body. It can be used for riding type mowers.

1 Self-propelled car body 2 Front wheels 3 Rear wheels 9 Engine 11 Mowing device 21 Car body frame (rear car body frame)
24 cover 30 cover 30a lateral end 30b front

Claims (3)

A self-propelled vehicle body equipped with front and rear wheels and having a pair of left and right vehicle body frames facing the front and rear of the vehicle body arranged at intervals in the vehicle body width direction at the rear of the vehicle body.
A mowing device provided between the front and rear wheels of the self-propelled vehicle body to mow the grass and discharge the mowed grass toward the rear of the self-propelled vehicle body to drop it on the ground.
A cover provided on the bottom of the self-propelled vehicle body so as to cover the upper part of the mowing grass discharge path on the rear side of the grass cutting device and close between the pair of left and right vehicle body frames.
A support bar that connects the left and right body frames is provided.
The cover is a riding-type mower that is received and supported from below by the support bar between the pair of left and right body frames. The riding-type mower according to claim 1, wherein the cover is inserted between a pair of left and right lower ends of the vehicle body frame. The passenger-type mower according to claim 1 or 2 , wherein the engine is supported by the pair of left and right body frames behind the mower.

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