JPH0856420A - Riding tractor - Google Patents

Abstract

(57) [Summary] [Purpose] It is easy to operate the PTO clutch, and moreover,
The PTO clutch is prevented from being operated unnecessarily and is made highly safe. In a passenger tractor, a PT for controlling on / off of power transmission to a working machine 5 connected to a traveling machine body 3 between an outer portion of a boarding step 33 and a front wheel 6 in front of a driver's seat 32.
The clutch lever 91 of the O-clutch 9 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passenger tractor, and more particularly to a passenger tractor having a mounting portion for mounting a working machine to the rear of a traveling machine body having an engine and a transmission and having a driver's seat and a boarding step.

[0002]

2. Description of the Related Art Conventionally, in addition to a seedling planting machine, a sprayer such as fertilizer or a sprayer such as a chemical solution is attached to a mounting portion provided on the rear side of a traveling body, and these various working machines are replaced. In a riding tractor capable of performing various administrative work other than seedling planting work, power transmission from the engine to various work machines mounted on the mounting part is switched on and off near the engine mounted on the traveling machine body. It is known that a PTO clutch for controlling is provided. The clutch lever of the PTO clutch is provided on the front side of the driver's seat so that the clutch lever can be operated from the boarding step. By operating this clutch lever, power to the various work machines is transmitted via the PTO clutch. It is designed to transmit and cut off.

[0003]

However, the above-mentioned PTO
The clutch lever of the clutch is supported so as to project upward so that it can be easily operated from the boarding step, and as a result, for example, when an operator walks on the boarding step, the foot of the worker is put on the clutch lever. If the PTO clutch is unnecessarily operated due to being caught, or if an external obstacle collides with the clutch lever, the P
The TO clutch was sometimes operated unnecessarily.

An object of the present invention is to make it easy to operate the PTO clutch not only from the boarding step but also when operating it while getting off, and moreover, it is possible to prevent the PTO clutch from being operated unnecessarily. It is to provide a riding tractor having excellent properties.

[0005]

In order to achieve the above object, the invention according to claim 1 is provided with a mounting portion 34 for mounting a working machine 5 behind a traveling machine body 3 having an engine 1 and a transmission 2, and In the passenger tractor provided with the driver's seat 32 and the boarding step 33, the driver's seat 32
The clutch lever 91 of the PTO clutch 9 for controlling the power transmission to the working machine 5 is provided between the outer side of the step 33 and the front wheel 6 in front of.

According to the second aspect of the present invention, the operating range of the clutch lever 91 is set below the upper surface of the boarding step 33.

[0007]

According to the first aspect of the invention, the clutch lever 91 of the PTO clutch 9 for controlling the on / off of the power transmission to the working machine 5 side has the outer side of the step 33 in front of the driver's seat 32. Since it is provided between the front wheel 6 and the front wheel 6, when the PTO clutch 9 is turned on and off, it can be easily operated in either the state of getting on or off of the boarding step 33, and moreover, the operator can get on the boarding step 33. When performing various work while walking on the step 33, the worker's foot or the like is caught on the clutch lever 91 provided between the outer side portion of the step 33 and the front wheel 6, or the PTO clutch 9 is engaged. It is possible to eliminate unnecessary manipulations of the machine, which makes it excellent in safety.

According to the second aspect of the invention, since the operating range of the PTO clutch 9 is set below the upper surface of the boarding step 33, various work can be performed while walking on the boarding step 33. In such a case, the foot of the operator is not caught on the clutch lever of the PTO clutch 9 which is operated on the lower side of the boarding step 33, and an external obstacle collides. Since it can be eliminated, unnecessary operation of the PTO clutch 9 can be prevented more reliably, and safety can be further enhanced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The riding tractor shown in FIGS. 1 to 3 has an engine 1 and a transmission 2 covered with a hood 1a.
A steering handlebar 31 and a driver's seat 32 are provided on the upper side of the traveling machine body 3 including and in a front-rear manner, and a boarding step 33 is provided from around the bonnet 1a to the driver's seat 32. A mounting portion 34 for mounting the working machine 5 composed of a spreader is connected to the rear side of the traveling machine body 3 through the lifting device 4, and front and rear axle cases 61 and 71 are provided on both front and rear sides of the traveling machine body 3. While supporting a pair of left and right front wheels 6 and rear wheels 7 respectively, a rectangular shape in plan view is formed between both sides of the riding step 33 formed around the bonnet 1a and the respective front wheels 6. A frame body 35 opened vertically is attached, and a plurality of front side weights 36 for balancing the left and right of the traveling machine body 3 can be attached to each frame body 35. Further, in the embodiments shown in the respective drawings, auxiliary steps 33a for covering a part of the front wheels 6 are provided on both sides of the driver's seat 32 in the boarding step 33.

Further, the engine 1 has an output shaft 1
1 is provided with a double pulley 12, and a double counter pulley 13 facing the pulley 12 is provided near the output shaft 11.
The intermediate shaft 14 provided with the
A double belt 15 is wound between Nos. 2 and 13, and a main transmission shaft 17 is connected to the intermediate shaft 14 via a front universal joint 16, and the main transmission shaft 17 is connected to the rear side thereof from the transmission 2. By connecting the extending input shaft 21 in an interlocking manner via the rear universal joint 18, the rotational power of the engine 1 is transmitted to the lance transmission 2 side, and the rotational power transmitted to the transmission 2 is transmitted to each of the axle cases 61. , 71 to the front wheel 6 and the rear wheel 7.

Further, the lifting device 4 provided on the rear side of the traveling machine body 3 is provided with a top link 42 and a pair of left and right lower links 43 that are interlocked with the lifting cylinder 41. The mounting portion 3 on the end side
4 are connected and the working machine 5 is attached to the attachment portion 34. As the working machine 5, in the embodiment of FIG. 1, a power sprayer for spraying fertilizer is provided, and the sprayer 5 is composed of a fertilizer tank 51, a blower 52, a fertilizer pipe 53 and the like.

Further, the rotary power of the engine 1 is transmitted to the working machine 5 side through the PTO clutch 9, and the rotary power of the engine 1 is taken out from the front stage side of the transmission 2 to the rear side. PTO axis 80
The power transmission mechanism 8 of a different system from the main transmission shaft 17
Is provided, and the PTO clutch 9 is interposed between the power transmission mechanism 8 and the output shaft 11 of the engine 1.
The power transmission from the engine 11 to the PTO shaft 80 of the power transmission mechanism 8 and the interruption thereof are performed by an on / off operation of the O-clutch 9, and the working machine 5 connected to the PTO shaft 80.
It is designed to control the turning power on and off.

As the power transmission mechanism 8, in the embodiment shown in FIGS. 1 and 2, the lower side of the boarding step 33 is located laterally of the engine 1 and the rotational power from the engine 1 is transmitted to the main transmission shaft 17. The driven shaft 8 parallel to the intermediate shaft 14 for transmission
1, the intermediate shaft 14 and the driven shaft 81 are provided with a drive pulley 82 and a driven pulley 83 so as to face each other, and an endless belt 84 is hung between the pulleys 82 and 83.
The driven shaft 81 is connected to a transmission shaft 86 extending rearward of the machine body through a front universal joint 85, and
On the rear side of the traveling body 3, the rear axle case 7 is provided.
The gear case 87 to be coupled to 1 is arranged so that the PTO shaft 80 is projected to the rear side of the gear case 87, while the intermediate shaft 88 is projected to the front side of the gear case 87, and the intermediate shaft 86 is It is connected to the transmission shaft 86 through a rear universal joint 89.

Further, as shown in FIG. 4, the PTO clutch 9 drives the power transmission mechanism 8 and the driven pulley 82, as the clutch lever 91 is manually operated.
It is configured by a tension pulley 92 that interferes with an endless belt 84 looped between 83 to operate power transmission from the engine 1 to the PTO shaft 80 by the belt 84. More specifically, the clutch lever 91
An operation box 94 having a guide groove 93 for guiding the clutch lever 91 is provided on both sides in the length direction of the guide groove 93 in the box 94 and a first latch 93a for holding the clutch lever 91 in the power input position and a power off position. Second latch 9
3b, and a box-shaped support 94 that supports the support arm 95 holding the clutch lever 91 and the tension pulley 92 is integrally connected to one side of the box 94. A tubular boss portion 91a is integrally provided on the tip end side of the clutch lever 91, and a tubular boss portion 95a is integrally provided on the base end side of the support arm 95, and these boss portions 91a, 95a are provided on the support body. 96 is rotatably supported by a rod 97, and the rod 97 and the bosses 91a, 95a are coupled by pin bodies 91b, 95b, whereby the clutch lever 91 and the support arm 95 are connected. And are linked together.

Then, the first latch 93 of the guide groove 93 provided in the operation box 94 is provided with the clutch lever 91.
When the rocking position is set to a, the tension pulley 92 is pressed against the endless belt 84 via the support arm 95, and the rotational power of the engine 1 is set to P by the belt 84.
The clutch lever 9 is transmitted to the TO shaft 80 side.
When 1 is moved to the second latch 93b of the guide groove 93 in a swinging position, the tension pulley 92 is separated from the endless belt 84 so that the belt 84 transmits power from the engine 1 to the PTO shaft 80 side. To shut it off. In the figure, 98 is an urging spring for constantly urging the tension pulley 92 toward the endless belt 84 in the pressing direction, and 99 is the latch lever 91 for the latches 93a, 93b of the guide groove 93. It is a spring for holding.

With the above structure, however, the engine 1 is provided on the front side of the driver's seat 32 in the traveling machine body 3 between the outer portion of the boarding step 33 and the front wheel 6.
Since the PTO clutch 9 for controlling the on / off of power transmission from the work machine 5 side to the work machine 5 side is provided, for example, when an operator or the like performs various work while walking on the boarding step 33,
The operator's foot is the clutch lever 9 of the PTO clutch 9.
Therefore, it is possible to prevent the clutch lever 91 from being unnecessarily operated due to being caught in the position 1. That is, FIG.
In the embodiment shown in FIG. 3, the front side weight 36 is disposed between the riding step 33 formed around the bonnet 1a and the front wheel 6 and is located below the mounting frame body 35 of the front side weight 36 which is opened vertically. In the part, the PTO clutch 9
Of the clutch lever 91
The operating range of the clutch lever 91 is set below the upper surface of the boarding step 33.
As indicated by a solid line and an imaginary line in FIG.
From the lower side of the frame 35 to the inner side that does not project to the upper side of the frame 35, and the PTO clutch 9 is turned on and off by the swinging over this range, and the engine 1 to the PTO shaft 80 is moved. The transmission of power to and the cutoff of power are performed.

With the above-mentioned structure, when the PTO clutch 9 is turned on and off via the clutch lever 91, the clutch lever 91 is provided at a lower portion of the frame body 35, so that the boarding step is performed. Whether the user is on or off the vehicle 33, the clutch lever 91 can be easily rocked from the upper opening of the frame 35, and the worker can perform various operations while walking on the boarding step 33. The clutch lever 91 is disposed between the outer side portion of the boarding step 33 and the front wheel 6 even when the vehicle is operated, so that the operator's foot or the like may be caught by the clutch lever 91. It is possible to prevent the PTO clutch 9 from being operated unnecessarily via the clutch lever 91.
Further, as described above, when the clutch lever 91 is swingably supported over the range between the lower portion and the inner side of the frame body 35, the foot of the worker who walks on the boarding step 33 has the clutch lever 91. Or
Further, it is possible to reliably prevent the PTO clutch 9 from being unnecessarily operated due to the collision of an external obstacle with the clutch lever 91, and it is possible to improve the safety.

[0018]

As described above, according to the invention described in claim 1, the mounting portion 34 for mounting the working machine 5 is provided behind the traveling machine body 3 having the engine 1 and the transmission 2, and the driver's seat 32 is provided. And a boarding step 33, the working machine 5 is provided in front of the driver's seat 32 and between an outer portion of the step 33 and the front wheel 6.
Since the clutch lever 91 of the PTO clutch 9 for controlling the on / off of power transmission to and from the PTO clutch 9 is provided, the PTO clutch 9 can be operated when the PTO clutch 9 is turned on or off, whether the passenger is on or off the boarding step 33. Can be easily operated via the clutch lever 91 provided in the step 33. Moreover, when the worker performs various work while walking on the boarding step 33, the worker's foot or the like is not connected to the outer portion of the step 33. Since it is possible to prevent the PTO clutch 9 from being unnecessarily operated by being caught on the clutch lever 91 of the PTO clutch 9 provided between the front wheel 6 and the front wheel 6, it is possible to improve the safety. is there.

According to the second aspect of the invention, since the operating range of the PTO clutch 9 is set below the upper surface of the boarding step 33, the boarding step 3
3 When performing various work while walking on the above 3, the PTO clutch 9 operated below the boarding step 33
Worker's feet are caught on the clutch lever of
Further, it is possible to prevent collision of external obstacles, more reliably prevent unnecessary operation of the PTO clutch 9, and further enhance safety.

[Brief description of drawings]

FIG. 1 is a side view showing the overall structure of a riding tractor according to the present invention.

FIG. 2 is an enlarged plan view in which a part of the main part is cut away.

FIG. 3 is a partial front view of the main part.

FIG. 4 is an enlarged perspective view of a PTO clutch.

[Explanation of symbols]

 1 ... Engine 2 ... Transmission 3 ... Traveling vehicle 32 ... Driver's seat 33 ... Boarding step 34 ... Mounting part 5 ... Working machine 6 ... ..Front wheel 9 ... PTO clutch 91 ... clutch lever

Claims (2)

[Claims] 1. A mounting portion (34) for mounting a working machine (5) behind a traveling machine body (3) having an engine (1) and a transmission (2), and further comprising a driver's seat (32) and a boarding step (34). 33) and the step (3) in front of the driver's seat (32).
Between the outer part of 3) and the front wheel (6), the working machine (5)
A passenger tractor characterized in that a clutch lever (91) of a PTO clutch (9) for controlling on / off of power transmission is provided in the vehicle. 2. The riding tractor according to claim 1, wherein the operating range of the clutch lever (91) is set below the upper surface of the boarding step (33).