JPH0556924B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a grass collector equipped with a front mower in front of front wheels.

(Prior Technology) Specialized machines used for mowing lawns, etc. include front mower types with a mower in the front and mid-mount mower types with a mower in the lower abdomen.
It is known that the front mower type allows work to be done under trees, allows the work area to be seen visually, and is superior in work efficiency and workability.

As a conventional technology of this kind, Utility Application No. 124437
The vehicle body of the grass collector equipped with a mower has an engine and a transmission arranged in series in the front-rear direction, a grass collection container mounted above the engine, and a rear grass collector mounted below the engine. The front mower is of a horizontal grass discharge type, and the grass clippings transfer means are located outside of the vehicle body and front wheels.

(Problems to be Solved by the Invention) In the prior art, the engine and transmission are arranged in series in the front and rear, so the overall length of the vehicle body is long. As a result, the turning radius is large, the turning radius is poor, and the stability on slopes is low.
It is difficult to further improve workability.
In addition, since the grass collection container is mounted on top of the engine, it is difficult to increase its capacity, and the grass clippings transfer means cannot be placed below the vehicle body.
Mowers with a grass outlet on one side and a wider width have no choice but to be used, making it difficult to work in narrow spaces.

(Means for Solving the Problems) In the present invention, the engine 4 and the transmission device 5 are arranged side by side on the left and right, the grass collection container 11 is arranged above the rear wheel 9, and the duct 88 of the cut grass transfer means 87 is arranged side by side. More 2
The above-mentioned problems of the prior art can be solved by connecting the grass outlet 90 at the rear of the vehicle to the grass collection container 11 through the lower part of the front wheel 7.

That is, the specific configuration of the problem solving means of the present invention is such that a pair of left and right front wheels 8 are suspended from the front part of the vehicle body 6 via a front axle 7, and the mower 2 is mounted in front of the front wheels 8. At least one rear wheel 10 is suspended from the rear part of the mower 2 via a rear axle 9, and a grass collection container 11 is mounted above the rear wheel 10. In a grass collector equipped with a front mower, a means 87 is provided and a driver's seat 94 is disposed above the vehicle body 6. and front and rear axle 7,
The grass collection container 11 is arranged above the rear wheel suspension part 71 behind the engine 4, and the duct 88 of the cut grass transfer means 87 is connected to the grass discharge port 90 at the rear of the mower 2. It passes under the front axle 7, stands up behind the front wheels 8, and is connected to the grass collecting container 11.

(Function) The engine 4 and the transmission 5 attached to the frame 3 between the front and rear wheels 8 and 10 are arranged side by side on the left and right, making the length of the vehicle body 6 in the longitudinal direction as short as possible. It is possible to turn in a radius. Further, since there is no engine 4 on the rear wheel 9, a large-capacity grass collection container 11 can be placed. A duct 88 of the grass clippings transfer means 87 that connects the mower 2 and the grass collecting container 11 is arranged below the front axle 7 and the engine 4, and the mower 2 has a grass discharge port 90 approximately in the center of the rear.
The duct 88 has a narrow width.
does not protrude outward from the front wheel 7.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In FIGS. 1 to 7, reference numeral 1 indicates a grass collector equipped with a front mower 2. The grass collector 1 has a frame structure type vehicle body 6 by attaching an engine 4, a transmission 5, etc. to a frame 3, a pair of left and right front wheels 8 are suspended from the front part of the vehicle body via a front axle 7, and a pair of left and right front wheels 8 are suspended from the front part of the vehicle body via a front axle 7. rear axle 9
A pair of left and right rear wheels 10 are suspended from the rear wheels 10, a grass collection container 11 is mounted above the rear wheels 10, a driver's seat 94 is arranged near the front wheels above the center of the vehicle body 6, and the front end of the frame 3 is A handle device 12 is disposed at.

As shown in FIG. 4, the frame 3 includes two rear pillars made of square pipes 3A, 3B, rear horizontal members 3C, 3D made of channel that connect them, two front pillars made of channel 3E, 3F, and front and rear pillars 3A. ,3B,3
A pair of left and right upper members 3G, 3H made of channel that connects the upper parts of E and 3F, a front horizontal member 3J made of channel that connects the front parts of left and right upper members 3G and 3H, and front and rear that connect the lower ends of front and rear struts 3A and 3E. Part 3K,
A channel intermediate member 3L parallel to this front and rear member 3K and connected to the left and right middle of the rear horizontal member 3D, a lower front member 3M connected between this intermediate member 3L and the front ends of the front and rear member 3K, and rearward from the rear horizontal member 3D. A pair of extended left and right channel support members 3N, 3
P, and a step support member 3R that is gate-shaped in plan view and protrudes forward and upward from the lower portions of the left and right front struts 3E and 3F.

The engine 4 is located within the frame 3,
It is attached to the front and rear members 3K and the intermediate member 3L via rubber mounts. The engine 4 has a crankshaft 15 shifted to the left from the center line 16 of the vehicle body 6, and the crankshaft 15 is provided with two large and small pulleys 17 and 18, which are used to generate driving power.
PTO system power is taken out. A radiator 19 and an oil cooler 20 are also mounted on the front and rear members 3K and the intermediate member 3L.

The transmission 5 includes an HST (hydrostatic transmission) 21 and a gear transmission mechanism 22, and is arranged in parallel on the right side of the engine 4, and is connected to the upper member 3H.
and is attached to the intermediate member 3L etc. via a rubber mount. This transmission 5 may be arranged on the left side of the engine 4. However, in order to maintain a good weight balance of the vehicle body 6, it is preferable that the engine 4 be eccentric to the side opposite to the transmission 5.

The HST 21 may be either a radial type or an axial type, and in this example, a radial type pump and motor are used in one body, and the pump shaft 23 is connected to the large pulley 12 of the engine 4 via a belt. A driven pulley 24 and a cooling fan 25 are provided, and a motor shaft 26 protrudes into a casing 27 of the gear transmission mechanism 22 .

As shown in FIG. 6, the gear transmission mechanism 22 includes three shafts 28, 29, and 30 arranged in upper and lower stages within a casing 27, with the first shaft 28 protruding rearward and serving as a rear wheel drive device. , the third shaft 30 projects forward and is used for the drive.

The first shaft 28 has a pinion 31 on the motor shaft 26.
A gear 32 meshed with the gear 32 is fixed, and a gear 33 having a shift gear portion 33a is loosely fitted.
In addition, a shifter 34 that engages with the shift gear portion 33a
are spline fitted. A shift fork 35 is engaged with the shift 34 and is slidably operated by a front wheel drive switching lever 36.

Two gears 37 and 38 are fixed to the second shaft 29, and the gear 37 is connected to the gear 33 on the first shaft 28.
The gear 38 meshes with a gear 39 fixed on the third shaft 30.

The third shaft 30 protrudes forward and is connected to the front wheel differential device 4 via a universal joint shaft 40 or directly connected to the front wheel differential device 4.
1 bevel pinion shaft 42.

The front wheel differential device 41 includes a bracket 44 in which a differential case 43 is fixed to the lower ends of the intermediate member 3L and the front strut 3F.
It is bolted to. Also, differential case 4
3 is connected to the casing 27 via a connecting member 45. Therefore, the HST 21, the gear transmission mechanism 22, and the front wheel differential device 41 can be attached to the frame 3 after being assembled in advance. Said third
When the shaft 30 and the bevel pinion shaft 42 are directly connected, the connecting member 45 can be constituted by a cylindrical member surrounding these shafts. 47 is the connecting member 4
5 is a bearing member for the pump shaft 23 fixed to the pump shaft 23.

A pair of left and right front axles 7 have front wheels 8 attached to their outer sides, are supported by a differential case 43 at their inner sides, and power is transmitted from a bevel pinion shaft 42 via a bevel gear 46 and a differential mechanism.

The front wheel differential device 41 is substantially coaxial with the third shaft 30, and is therefore arranged offset to the right from the center line 16 of the vehicle body 6, leaving the front of the engine largely open. 48 is a front axle bearing member provided on the front and rear members 3K to support the left front wheel 8 which is far away from the front wheel differential device 41, and 49 is a battery attached to the upper member 3G.

A PTO shaft 51 is supported through the front wheel differential case 43 in the longitudinal direction, and a pulley 52 to which power is transmitted from the small pulley 18 of the engine 4 via a belt is provided at the rear of the PTO shaft 51.
A universal joint shaft 53 for transmitting power to the front mower 2 is provided at the front. 54 is a PTO type tension clutch.

On the other hand, the first shaft 28 is provided with an electromagnetic or mechanical brake 55 at the rear, and the front and rear wheels 8, 1
0 can be braked at the same time. Further, a transmission shaft 57 is connected to the rear end of the first shaft via a one-way clutch 56, and this transmission shaft 57 is connected to an input shaft 59 of a rear wheel gear device 58 and a universal joint 60.
are interlocked and connected via. The one-way clutch 56 rotates in four-wheel drive, and when the rear wheel 10 has a larger turning radius than the front wheel 8, the one-way clutch 56
Allows high circumferential speed rotation.

In FIG. 7, the rear wheel gear device 58 has a casing 61 divided into a large number of parts in the vertical direction. 1st
The case 61A includes the left and right support members 3N of the frame 3,
3P, and supports the input shaft 59. The second case 61B is the first case 61A
It is bolted to and supports the bevel gear 62. This bevel gear 62 meshes with a bevel pinion 63 on the input shaft 59, and is spline-fitted to the upper end of a vertical bevel pinion shaft 64.

The second case 61B has a cylindrical shape, and a cylindrical third case 61C is fitted on the outside thereof,
This third case 61C supports the lower part of the bevel pinion shaft 64 and is prevented from being removed downward by the bevel pinion shaft 64. Third case 6
1C is rotatably fitted into the second case 61B via a bush 65, and has a flange 66 protruding from the outer periphery.
A steering sprocket 67 is bolted to.

At the bottom of the third case 61C is a fourth case 61D.
A pair of left and right fifth cases 61E are fixed to this fourth case 61D, and a rear wheel differential case 68 is formed by these fourth and fifth cases 61D and 61E. A differential bevel gear 69 is supported on the left and right fifth cases 61E, and a pair of left and right rear axles 9 are supported, and the differential bevel gear 69 meshes with a differential bevel pinion 70 at the lower end of the bevel pinion shaft 64.

The left and right rear wheels 10 that are formed short on the rear axle 9 and attached thereto have a tread approximately one-third that of the front wheels 8.
The rear wheel suspension section 71 formed by the support members 3N and 3P can be steered approximately 160 degrees around the vertical axis.

A steering hydraulic cylinder 73 is fixed to the support members 3N and 3P, and both ends of a chain 75 are connected to both ends of a piston rod 74 that protrudes on both sides. The chain 75 is wound around the sprocket 67, and can be rotated approximately 160° from the third case 61C downwards relative to the first and second cases 61A and 61B by the reciprocation of the hydraulic cylinder 73. Reference numeral 76 indicates two guide sprockets for ensuring that the chain 75 is wound around the sprocket 67, and is supported by the support members 3N and 3P.

A handle 79 of the handle device 12 is arranged at the forefront of the vehicle body 6. A step plate 80 is attached to the gate-shaped step support member 3R, a handle post 81 is erected at the center of the front part of the step plate 80, and a control valve 82 for controlling the hydraulic cylinder 73 is provided on the back surface of the step plate 80. It is being

The pair of left and right support members 3N and 3P form a rear wheel suspension part 71 and also serve as a device part of the grass collection container 11, and the grass collection container 11 is located directly above the left and right rear wheels 10. Although the grass collecting container 11 is not shown in detail, it is formed by attaching a basket made of punched metal or wire mesh to a mounting frame body, and the mounting frame body fixes the lower end of the front column 84 to the rear columns 3A, 3B. It is inserted into the cylindrical member 83 of the frame 3 and is detachable from the frame 3. A mounting frame or a basket is installed on the support members 3N and 3P, and the basket can be opened and closed to release the stored grass. The width of the grass collection container 11 is larger than the width of the vehicle body 6, but is set smaller than the width of the front wheels 8.

The grass collection container 11 is connected to the mower 2 via a grass clippings transfer means 87. The grass clippings transfer means 87 has a duct 88, which is connected to the mower deck 8.
The front end is connected to a grass outlet 90 located approximately in the center of the back wall of the container 9, and the rear end is connected to the upper front surface of the grass collection container 11. The duct 88 runs from the grass outlet 90 to the left and right front wheels 8.
It passes below the front axle 7 in between, protrudes to the side of the vehicle body 6 behind the front wheels 8, rises upward from there, and is substantially horizontal until an L-shaped bent portion 88a in the middle. Since the front wheel differential device 41 is offset from the center line 16, the duct 88 is located close to the front axle 7, ensuring sufficient ground clearance. Although the grass outlet 90 is slightly upward, the moadetsuki 8
It is located at approximately the same height as the grass clippings transfer space in 9.

The duct 88 protrudes outside the frame 3, but is located inside the front wheel 8 and the grass collection container 11 rather than outside. An article storage container 91 used as a fuel tank is disposed behind the midway bent portion 88a of the duct 88, and is fixed to the outer surface of the frame 3. Although the article storage container 91 is located outside the rear wheel 10 and below the grass container 11, it may also be located in front of the grass container 11.

This container 91 prevents the halfway bent portion 88a from hitting an obstacle when moving backward, and the duct 88 is almost completely protected from obstacles in the front and rear direction by the front wheel 8, grass collection container 11, and container 91. There is. Incidentally, a pair of containers 91 may be provided on the left and right sides of the frame 3, or they may be used, for example, as a tool box instead of being used as a fuel tank.

Front wheel fenders 92 are fixed to the outer surfaces of the left and right upper members 3G and 3H of the frame 3, and a floor sheet 93 is fixed between them. The front end of the floor seat 93 is connected to the step plate 80, and a driver's seat 94 is arranged on the upper surface thereof. Step board 8
Pedals 95 and 96 above 0 are forward and reverse shift pedals for HST, and 97 is a brake pedal, respectively.

A safety frame 101 protects the operator on the driver's seat 94, and is formed by connecting left and right frame members 102 with a horizontal member 103 on the ceiling.
2, 103 is formed of a square pipe or a round pipe.

An insertion part 104 is formed by inserting and fixing one end of a square piece into the lower end of the front and rear legs of the left and right frame member 102, and the insertion part 104 of the rear leg is inserted into the fitting part 105 at the upper part of the square pipe rear struts 3A and 3B. and pin or bolt 1
06, and the insertion part 104 of the front leg is inserted into a fitting part 105 formed by standing a square pipe in the front part of the step support member 3R, and the pin or bolt 10
They are connected by 6. Therefore, the safety frame 10
1 is detachably attached to the vehicle body 6. still,
A canopy may be removably attached to the ceiling of the safety frame 101.

In FIGS. 1 and 2, the mower 2 has three vertical shafts 110A, 110B, 110C on the mower deck 89.
and a disk 111 at the lower end of each vertical shaft 110.
A cutter 112 is swingably supported on the disk 111 via a pivot 113, and when the disk 111 rotates, the cutter 112 is projected in a radial direction by centrifugal force to cut grass. has been done.

The three vertical shafts 110 have sprockets 11 at the top.
4 is inserted into a gear case 115 fixed to a mower deck 89 at the upper end of the central vertical shaft 110A, and receives power transmission from an input shaft 116.
The input shaft 116 includes a PT shaft 51 supported by the front wheel differential case 43 and a universal joint shaft 53.
are connected.

Reference numeral 117 denotes a tension sprocket, and a chain 118 is wound around this sprocket 117 and the sprocket 114 on the three vertical shafts 110, and each disk 111 is moved by power from the PTO shaft 51.
A, 111B, and 111C are rotated in the direction of the arrow in FIG. Incidentally, for power transmission to the three vertical shafts 110, gear transmission or belt transmission can be used as appropriate.

Each of the disks 111 is provided with a plurality of blades 119 on its upper surface, serving as a blower for sending the grass clippings to the duct 88, and forming a part of the grass clippings transfer means 87. However, instead of providing the blades 119, an independently driven blower or a blower that receives power from the engine 4 may be provided in the middle of the duct 88, in the mower deck 89, the grass clippings container 11, or the like.

The mower 2 is connected to the vehicle body 6 by two links 120 pivotally supported by the lower front member 3M.
A lifting means 121 is provided between the book link 120 and the step plate 80 or the step support member 3R. This pulling means 121 is formed of a hydraulic cylinder, and lifts and holds the mower 2 when the grass collector 1 travels on the road, and is freely expandable and contractible during mowing work.

In the mower 2, reference numeral 122 indicates a pair of left and right ground wheels, and reference numeral 123 indicates limit gauge wheels provided at the front center and rear left and right sides, respectively.

It should be noted that the present invention is not limited to the embodiments described above, and can be modified in various ways. For example, the rear wheel 10 can be a single wheel that is not driven, the front wheel 8 can be a steering wheel, the transmission 5 can be mechanical, and the grass outlet 90 of the mower 2 can be connected from the center of the back wall. Shift to one side, front wheel differential device 41
can also be arranged on the vehicle body center line 16.

(Effects of the Invention) According to the present invention described in detail above, the engine 4 and the transmission 5, which are attached to the frame 3 and constitute the vehicle body 6, are arranged side by side in the left and right direction. The length in the direction can be shortened, and therefore the wheelbase of the front and rear wheels 8, 10 can be made small.
Since the minimum turning radius can be made smaller, it is possible to further improve work efficiency, and since the grass collection container 11 is placed above the rear wheel suspension part 71 behind the engine 4, it can have a large capacity. Further, since the duct 88 of the grass clippings transfer means 87 passes under the front axle 7, it will not protrude from the outer surface of the front wheel 7 and be damaged, and the mower 2 can have a grass discharge port 90 at the rear. Therefore, the overall width is narrower, making it easier to work in narrow spaces.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is an overall plan view, FIG. 2 is an overall side view, FIG. 3 is a sectional front view, FIG. 4 is a perspective view of the frame, and FIG. 5 is a drive FIG. 6 is a cross-sectional side view of the gear transmission mechanism, and FIG. 7 is a longitudinal cross-sectional view of the rear wheel gear device. 1... Grass collector, 2... Mower, 3... Frame, 4... Engine, 5... Transmission, 6... Vehicle body, 7... Front axle, 8... Front wheel, 9... Rear axle,
10... Rear wheel, 11... Grass collecting container, 21...
HST, 22... Gear transmission mechanism, 41... Front wheel differential device, 87... Grass transfer means, 88... Duct, 90... Grass discharge port, 94... Driver's seat.

Claims (1)

[Claims] 1. A pair of left and right front wheels 8 are suspended from the front part of the vehicle body 6 via a front axle 7, and a mower 2 is attached to the front of the front wheels 8. A rear axle 9 is attached to the rear part of the vehicle body 6. At least one rear wheel 10 is suspended through the mower 2, and a grass container 11 is mounted above the rear wheel 10.
7, and a driver's seat 94 is arranged above the vehicle body 6. The vehicle body 6 has an engine 4 and a transmission 5 mounted on a frame 3 from which front and rear wheels 8, 10 are suspended. are front and rear wheels 7,
The grass collection container 11 is arranged above the rear wheel suspension part 71 behind the engine 4, and the duct 88 of the cut grass transfer means 87 is connected to the grass discharge port 90 at the rear of the mower 2. A grass collector equipped with a front mower, which passes under a front axle 7, stands up behind a front wheel 8, and is connected to a grass collecting container 11.