JP3751886B2 - Riding lawn mower - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a riding-type lawn mower in which a rotary mower that is rotated by an engine mounted on the traveling machine body is mounted on a traveling machine body on which an operator rides and operates.
[0002]
[Prior art]
Conventionally, in this type of riding lawn mower, for example, as described in Japanese Patent Application Laid-Open No. 9-9757, etc., it is supported by a pair of left and right front wheels and a pair of left and right rear wheels. A steering handle is provided next to the engine on the front upper surface of the fuselage, while a steering seat is provided on the rear upper surface of the traveling aircraft, and the power of the engine is transmitted to the two rear wheels via a traveling mission mechanism. Is configured to travel a traveling machine body, and further, a rotary mower is attached to a portion between both front wheels and both rear wheels of the traveling machine body. It is configured to be rotationally driven by power transmission from the engine.
[0003]
However, this conventional riding lawn mower is configured so that the mowing lawn cut by the rotary mower is sucked into a fan provided at one end of the rotary mower. It increased by the amount, leading to an increase in size.
[0004]
Therefore, in a recent riding-type lawn mower, the exhaust duct of the mowing lawn cut by the rotary mower mounted between the front wheels and the rear wheels extends backward to the portion between the left and right rear wheels. The arrangement is as follows.
[0005]
[Problems to be solved by the invention]
However, in this way, the mower lawn discharge duct from the rotary mower is disposed in the portion between the left and right rear wheels so as to extend rearward, so that the traveling mission mechanism for both rear wheels is disposed above the discharge duct. In connection with the fact that the traveling mission mechanism is located at a high part, the power transmission mechanism from the engine mounted on the front part of the traveling vehicle body to the traveling mission mechanism is the traveling mission mechanism. Because it protrudes from the floor at the part where the operator gets on and off between the control handle and the control seat of the traveling aircraft, it is in the way of getting on and off of the operator on the traveling aircraft. There was a problem of becoming.
[0006]
Further, in order to prevent the power transmission mechanism of the traveling mission mechanism from protruding from the traveling machine body from the engine, the power transmission mechanism must be configured to be detoured so as to avoid the cut grass discharge duct. The structure of the transmission mechanism becomes complicated, leading to an increase in size and weight.
[0007]
It is a technical object of the present invention to solve this problem by a simple power transmission mechanism and to reduce the height of the traveling machine body.
[0008]
[Means for Solving the Problems]
In order to achieve this technical problem, claim 1 of the present invention provides:
“The engine and the steering handle are provided at the front part of the traveling body supported by both front wheels and both rear wheels, and the steering seat is provided at the rear part of the traveling body, respectively, A rotary mower is attached to the part, and a mow lawn discharge duct from the rotary mower is disposed so as to extend rearward between the rear wheels. In the riding lawn mower with a mission mechanism,
An endless belt for power transmission is wound between an output pulley whose vertical axis is in the engine and an input pulley whose vertical axis is in the traveling mission mechanism, and the endless belt is connected to both pulleys. A pair of left and right guide ring members disposed in contact with the endless belt at a portion between the endless belts, the rear part of the guide ring bodies being inclined obliquely upward, and the endless belt Of these, the guide ring bodies were bent so that the portions of the guide ring bodies were positioned outside the pulleys in plan view. "
It is characterized by that.
[0009]
Further, claim 2 of the present invention provides
“In the description of claim 1, the axes of the two guide wheels are inclined obliquely outward in the upward direction when viewed from the traveling direction.”
It is characterized by that.
[0010]
[Operation and effect of the invention]
In this configuration, the power of the engine can be transmitted to the traveling mission mechanism with an endless belt having a simple structure, but the end portion of the endless belt is inclined obliquely upward. Thus, it is possible to reduce the middle part of the endless belt from protruding from the floor surface of the traveling body between the control handle and the control seat where the operator gets on and off. It is possible to simultaneously achieve the simple structure of the power transmission mechanism to the traveling mission mechanism and the ease of getting on and off the traveling body of the operator.
[0011]
In addition, the endless belt is bent so that the portions of the guide ring bodies of the endless belt are located outside the pulleys in a plan view, thereby creating a space between the guide ring bodies. In the space portion, a steering mechanism in the steering handle or various operation pedals or levers can be arranged, so that the endless belt and the steering mechanism can be overlapped in the height direction. The height of the traveling machine body can be lowered by that amount, and the running stability can be improved.
[0012]
By the way, the endless belt bends three-dimensionally at the positions of both guide ring bodies, but the axis of the both guide ring bodies is inclined obliquely outwardly upward as seen from the traveling direction. Therefore, it is possible to smoothly guide the endless belt while bending it three-dimensionally with the guide ring, so that the endless belt can be reliably reduced from coming off from the guide ring, and the durability of the endless belt is ensured. In addition, the height of the guide ring body can be lowered by inclining the axis of the guide ring body.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS.
[0014]
In this figure, reference numeral 1 denotes a traveling machine body supported by a pair of left and right front wheels 2 and a pair of left and right rear wheels 3. An engine 4 is mounted on the upper surface of the front part of the traveling machine body 1. In addition, a steering handle 5 for simultaneously turning both front wheels 2 to change the direction is provided, and a steering seat 6 on which an operator sits on the rear upper surface of the traveling body 1 and the both rear A fender 7 for the wheel 3 is provided, and a step base 8 is provided on the upper surface of the middle part of the traveling machine body 1.
[0015]
A rotary mower 9 having a pair of left and right rotary mowing blades 9a and 9b can be moved up and down on the lower surface side of the traveling machine body 1 and between the front wheels 2 and the rear wheels 3. It is attached to. The vertical movement mechanism of the rotary mower 9 is omitted.
[0016]
An output shaft 4 a with the axis of the engine 4 in the vertical direction protrudes downward from the engine 4, and an output pulley 10 fitted on the output shaft 4 a and a pulley 11 on an intermediate shaft 9 c provided in the rotary mower 9. An endless belt 12 is wound between the intermediate shaft 9c and the rotation of the engine 4 is transmitted to the intermediate shaft 9c. The intermediate shaft 9c and the support shafts 9a 'and 9b' of the rotary cutter blades 9a and 9b In the meantime, the endless belt 13 is wound around so that the rotary cutting blades 9a and 9b rotate in opposite directions as indicated by arrows. Further, on the lower surface side of the rear part of the traveling machine body 1, a mow lawn discharge duct 14 that discharges mowed lawn mowed by the rotary cutting blades 9a and 9b to the rear extends between the rear wheels 3. The ceiling board 14a of the cut grass discharge duct 14 is inclined obliquely upward toward the rear.
[0017]
The intermediate shaft 9c of the rotary mower 9 is positioned outside the support shaft 9b 'of the one rotary cutting blade 9b and on the front side, thereby preventing the operator from getting on and off the traveling machine body 1. In addition, a vertical movement mechanism for raising and lowering the rotary mower 9 with respect to the traveling machine body 1 can be disposed between the support shafts 9a ′ and 9b ′.
[0018]
A traveling mission mechanism 15 for appropriately shifting the rotation of the engine 4 and transmitting it to the rear wheels 3 at the upper part of the cut grass discharge duct 14 and at the lower part of the control seat 6, The input shaft 15a with the axis to the traveling mission mechanism 15 in the vertical direction is disposed so as to face upward.
[0019]
An endless belt 17 is wound between the intermediate shaft 16 that is supported in parallel with the input shaft 15a in the vicinity of the traveling mission mechanism 15 and the input shaft 15a. On the other hand, an endless belt 20 is wound between an input pulley 18 fitted to the intermediate shaft 16 and an output pulley 19 fitted to the output shaft 4a of the engine 4 to rotate the engine 4. Is transmitted to the traveling mission mechanism 15 via the intermediate shaft 16.
[0020]
The endless belt 20 may be configured such that the input pulley 18 is provided on the upward input shaft 15a of the traveling mission mechanism 15 and is directly wound around the input pulley 18.
[0021]
On the other hand, a pair of left and right guide wheel bodies 21 configured to be rotatable are provided on a portion between the output pulley 19 and the input pulley 18 so as to be supported by the traveling machine body 1. When the endless belt 20 is in contact with an intermediate portion of the endless belt 20, the front end of the endless belt 20 from both guide ring bodies 21 is substantially horizontal in the side view (FIG. 1). The part behind the body 21 is bent so as to incline obliquely upward.
[0022]
In addition, the endless belt 20 can be seen in plan view (FIG. 2) by making the distance between the guide ring bodies 21 larger than the diameters of the output pulley 19 and the input pulley 18. Of these, the portions that come into contact with both guide wheel bodies 21 are bent so as to be located outside the pulleys 19 and 18.
[0023]
Further, as shown in FIG. 4, the axis 21 a in the both guide wheel bodies 21 is configured to be inclined obliquely outwardly upward when viewed from the traveling direction in the traveling machine body 1.
[0024]
Reference numeral 23 denotes a pulley for applying a predetermined tension to the endless belt 29.
[0025]
Thus, the endless belt 20 wound between the output pulley 19 on the output shaft 4a that makes the axis line in the engine 4 up and down and the input pulley 18 that makes the axis line in the traveling mission mechanism 15 up and down, When viewed from the side (FIG. 1), the end of the endless belt 20 is bent so that the rear portion of the endless belt 20 contacts the middle portion of the endless belt 20 so as to incline obliquely upward. While power can be transmitted to the traveling mission mechanism 15 by the endless belt 20 having a simple structure, the middle part of the endless belt 20 is the steering handle 5 and the control seat 6 in the traveling body 1. Projecting from the floor surface of the step table 8 on which the operator gets on and off.
[0026]
In addition, the endless belt 20 is bent so that a portion of the endless belt 20 that contacts the guide wheel bodies 21 is located outside the pulleys 19 and 18 in a plan view (FIG. 2). , A space is formed between the guide wheel bodies 21, and the steering mechanism 22 in the steering handle 5 can be disposed in the space portion as described above, so that the endless belt 20, Since the steering mechanism 22 can overlap in the height direction, the height of the traveling machine body 1 can be made lower than when the endless belt 20 and the steering mechanism 22 are arranged side by side.
[0027]
In addition to providing the steering mechanism 22 in the portion between the two guide wheel bodies 21, various operation pedals or levers may be provided, or various operation pedals may be used instead of the steering mechanism 22. For example, a pedal or a lever may be provided.
[0028]
Furthermore, the endless belt 20 is inclined to both the guide ring bodies 21 by tilting the axis 21a of the both guide ring bodies 21 obliquely outwardly when viewed from the traveling direction of the traveling machine body 1. As described above, guiding can be performed smoothly while bending three-dimensionally.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of the present invention.
2 is a plan view of FIG. 1. FIG.
FIG. 3 is a plan view showing power transmission by an endless belt from an output pulley in an engine to an input pulley in a traveling mission mechanism.
4 is a side view taken along the line IV-IV in FIG. 3;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Traveling machine body 2 Front wheel 3 Rear wheel 4 Engine 4a Engine output shaft 19 Output pulley 5 Steering handle 6 Steering seat 8 Step base 9 Rotary mower 14 Mowing lawn discharge duct 15 Traveling mission mechanism 15a Input shaft 18 of traveling mission mechanism Input pulley 20 Endless belt 21 Guide wheel 22 Steering mechanism

Claims (2)

An engine and a steering handle are provided at the front part of the traveling vehicle body supported by both front wheels and both rear wheels, and a steering seat is provided at the rear part of the traveling vehicle body, while a portion between the two front wheels and the two rear wheels. A rotary mower is attached to the rotary mower, and a cut grass discharge duct from the rotary mower is disposed so as to extend rearward between the rear wheels, and a traveling mission for the rear wheels is disposed above the cut grass discharge duct. In the riding-type lawn mower that has a mechanism,
An endless belt for power transmission is wound between an output pulley whose vertical axis is in the engine and an input pulley whose vertical axis is in the traveling mission mechanism, and the endless belt is connected to both pulleys. A pair of left and right guide ring members disposed in contact with the endless belt at a portion between the endless belts, the rear part of the guide ring bodies being inclined obliquely upward, and the endless belt A riding lawn mower characterized in that both guide wheel bodies are bent so as to be positioned outside the pulleys in plan view. 2. The riding lawn mower according to claim 1, wherein the axis of the both guide wheel bodies is inclined obliquely outwardly upward when viewed from the traveling direction.

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