JPH0248305Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a structure for attaching a work equipment mounting device to a vehicle body in a riding work machine for agricultural use or the like.

[Conventional technology]

A conventional riding work machine in which a transmission is installed at the rear of the vehicle body, and a work equipment mounting device is attached to the rear of the vehicle body, which connects the work equipment driven by a PTO device installed in the transmission so that it can be raised and lowered. In this case, the transmission is provided in the rear part of the body frame disposed in the longitudinal direction of the vehicle at the center position with respect to the left and right sides of the vehicle body, and the casing of the transmission is provided with reinforcing ribs or is cast thickly. The base end of the arm-shaped coupler of the work equipment mounting device is supported directly on the side surface of the casing so as to be swingable in the vertical direction, and the arm-shaped coupler is swingably driven through the link. Therefore, in many cases, a hydraulic cylinder for raising and lowering a working machine connected to the tip of the coupler is directly fixed to the upper surface of the casing to attach the working machine mounting device.

[Problem to be solved by the invention] Therefore, in the conventional riding work machine in which the work equipment mounting device is attached to the vehicle body as described above, the tip of the arm-shaped coupler of the work equipment mounting device is When the work equipment is towed, the tensile load is concentrated at one point on the transmission casing that supports the base end of the coupler, and when the work equipment is raised to change direction, etc. Since most of the weight of the work equipment and the weight of the coupler are concentrated on the coupler support part of the casing, the casing of the transmission must be designed to be able to withstand all kinds of loads, taking into account impact loads. As a result, the weight of the transmission increases, and the frame supporting the transmission also needs to be reinforced, which increases the weight of the vehicle and makes it difficult to drive on rough or muddy terrain. There was an inconvenience that it was disadvantageous for many riding work machines.

The present invention has been devised in view of the above points, and is a mounting structure for a work equipment mounting device that reduces the weight of the transmission of a riding work equipment, can firmly support it on the vehicle body, and also reduces the size and simplification of the vehicle. The purpose is to provide.

[Means to solve the problem]

As a means for solving the above-mentioned problems, the present invention provides a coupling device for connecting working equipment, which includes a transmission at the center position with respect to the left and right sides of the vehicle body at the rear of a frame disposed in the longitudinal direction of the vehicle. In a riding work machine in which a work equipment mounting device is attached to the rear of the vehicle body, the work equipment mounting device has an elevator that drives the machine up and down.
The transmission is arranged so as to straddle the transmission and supported at a plurality of points, a seat is arranged above the transmission, and the coupler is mounted on the rear side of the vehicle body of the mounting stay in the vertical direction. The lift is attached to be swingable and the lift is attached to the upper surface of the mounting stay, and when viewed from the side of the vehicle, the mounting portion of the lift and the swing shaft of the coupler are arranged on both sides of the transmission. It is characterized by being located toward the front of the vehicle from the rearmost position of the rear wheels.

[Effect]

With this configuration, the load of the work equipment mounting device is distributed and supported at multiple locations on the transmission casing, so the weight of the casing can be reduced, and the vehicle weight can be reduced. It can be firmly supported on the vehicle body, and the overall length of the vehicle can be shortened, making it possible to downsize and simplify the vehicle.

〔Example〕

An embodiment in which the present invention is applied to a four-wheel drive, front and rear wheel steering agricultural riding working machine will be described below with reference to the drawings.

The riding work machine 1 has a box-shaped main frame 2 that extends through the center of the vehicle body from the front end to the rear end of the vehicle body. rear wheel 4,
4 are independently suspended, and both front wheels 3, 3 and both rear wheels 4, 4 are both driven and can be steered.

The power transmission mechanism that drives the front wheels 3 and the rear wheels 4 respectively includes an engine 5 mounted on the upper surface of the widened part 2a on the front side of the main frame 2 via a rubber mount (not shown), and A transmission 6 is installed with bolts on the upper surface of a wide mounting portion 2b of a U-shaped steel plate with an open portion on the upper surface, which is connected to the rear side of the transmission 6, and a crankshaft that is the output shaft of the engine 5. A first propeller shaft 7 is connected to a rear extending portion on which the flywheel 5b of 5a is pivoted and an input shaft 6a of the transmission 6 via universal joints, and is disposed above the main frame 2. and a front wheel drive output shaft protruding from the rear wheel differential case 8 and a front wheel drive input shaft protruding from the front wheel differential case 10 via universal joints, respectively, and the main frame. A second propeller shaft 9 is inserted into the inside of the propeller shaft 9. In addition, the rear wheel differential case 8
is integrally assembled on the output side of the transmission 6 at the lower rear side of the vehicle body, and the front wheel differential case 10 is suspended below the engine 5 mounting portion of the main frame 2.

The power of the engine 5 is transmitted to the clutch mechanism built in the transmission 6 via the first propeller shaft 7, and after being changed in speed by the transmission mechanism, the power is transmitted to the output section of the differential case 8 for the rear wheels. The signal is transmitted to the final reduction gear of the final case 12 through rear wheel drive shafts (not shown) connected to each other at a universal joint, driving the rear wheels 4, 4, and is also transmitted to the second propeller shaft 9. The power is provided by front wheel drive shafts (not shown) each connected to the output part of the front wheel differential case 10 by a universal joint.
The signal is transmitted to the final reduction gear of the final case 11 to drive the front wheels 3, 3, thereby enabling four-wheel drive driving.

On the other hand, the steering mechanism for the front wheels 3 and rear wheels 4 is controlled by a seat 1 disposed above the transmission 6.
A steering gear box 14 is provided on the upper surface of the main frame 2 in front of the engine 3 and near the rear of the engine 5, and a steering wheel 15 is provided at the upper end, and the lower end is connected to the steering gear box 1.
4, a linkage 17 connected to the output side of the steering gear box 14, and a front wheel steering tie rod 17a connected to the linkage 17.
and a rear wheel steering tie rod 19 connected to the linkage 17 via a drag link 18. By operating the steering wheel 15, the front wheels 3 and rear wheels 4 are simultaneously steered to change direction with a small turning radius. can.

In addition, an exhaust pipe 20 is installed in front of the engine 5 at the front of the vehicle body where the engine 5 is installed.
A muffler 21 is interposed in the engine 5, a fuel tank 22 is provided above the rear portion of the engine 5, and a cooling fan 23 is provided at the connection portion of the rearward extending portion of the crankshaft 5a to the first propeller shaft 7.
These engine 5, muffler 21, fuel tank 2
2 and the surroundings of the cooling fan 23 are the sheets 13
An engine room 25 is formed by being covered by a bonnet 24 except for the sides. The bonnet 2
A louver 26 for discharging cooling air is provided at the front of the vehicle body 4, and a shielding plate 27 that blocks radiant heat from the heated muffler 21 hangs from the bonnet 24 between the engine 5 and the muffler 21. It is set up.

As the cooling fan 23 rotates, the cooling air taken in from the open portion on the seat 13 side is sent from the rear to the front inside the engine room 25, cooling the engine 5 and the muffler 21, and fuel The tank 22 is prevented from being heated and is discharged from the louver 26 to the outside.

Further, the first propeller shaft 7 disposed above the main frame 2 is covered by a cover 28 supported by the main frame 2 between the seat 13 and the engine room 25.

Step devices 29 are disposed below both sides of the cover 28. As shown in FIG. This step device 29
are installed substantially horizontally on the left and right sides of the main frame 2, respectively, for the driver to rest his or her feet on when getting on and off the vehicle.
and step portions 29a, 29a on which to place one's feet during work.
and a protective portion 29b that extends diagonally upward from the front side of the vehicle body of each of the left and right step portions 29a. This prevents water, dirt, etc. splashed up by the front wheels 3, 3 from entering the engine room 25 as much as possible.

A clutch pedal 30 protrudes from the left side of the front part of the step portion 29a, and a right brake pedal 31 and a left brake pedal 32 protrude side by side from the right side.

A front work equipment mounting device 35 including a hydraulic elevator 33 and a coupler 34 is installed at the front of the vehicle body. This coupler 34 is attached to the front part of the main frame 2 so as to be able to swing in the vertical direction, and allows desired working equipment (not shown) to be moved by the hydraulic elevator 33 provided on the front upper surface of the main frame 2. Able to go up and down
In addition, a PTO device (not shown) connected to the front extending portion of the crankshaft 5a of the engine 5 allows the V
It is provided so that it can be driven via a belt. A rear working equipment mounting device 38 including a hydraulic lift 36 and a coupler 37 is installed at the rear of the vehicle body. This coupler 37 allows desired working equipment (not shown) to be raised and lowered by a hydraulic lift 36, and also allows a PTO device (not shown) provided in the transmission 6 to be moved up and down.
It is equipped so that it can be driven by.

Further, at the rear of the vehicle body, a mounting stay 39 for the rear work equipment mounting device 38 is disposed so as to straddle the transmission 6 and is supported by the transmission 6 at a plurality of locations. The mounting stay 39 is formed by bending a steel plate into a gate shape using a press. Both sides 39a of the mounting stay 39,
39a are fastened to each of the casings by bolts 40 at 8 locations, 2 locations above and below on the rear side of the left and right side surfaces of the vehicle body, 1 location on the upper front side, and 2 locations on the front side of the upper portion 39b, The weight of the rear work equipment mounting device 38 and the load of the work equipment connected thereto are distributed and supported by the casing of the transmission 6, and the weight of the casing can be reduced, reducing the weight of the vehicle. At the same time, it can be firmly supported on the vehicle body. Further, the rear wheel steering tie rod 19 is attached to both sides 3 of the mounting stay 39.
It is arranged between the rear wheels 9a, 39a and the rear wheels 4, 4, and the space is effectively utilized for simplicity.

Bearing portions 39c, 39c are provided on both side portions 39a, 39a of the mounting stay 39, extending rearwardly. The rear ends of the bearings 39c, 39c are connected to the transmission 6 when viewed from the side of the vehicle.
It is located on the vehicle front side from the rearmost position of the rear wheels 4, 4 arranged on both sides of the bearing parts 39c,
The proximal end of the coupler 37 is attached to the center of a swing support shaft 41 which is horizontally installed with both ends rotatably supported by the connector 37. Further, the hydraulic elevator 36 is attached to a bolt 42 at the center of the upper surface of the upper part 39b of the mounting stay 39.
The link mechanisms 36a, 36a of the hydraulic lift 36 are connected to move the coupler 37 up and down, and from a side view of the vehicle, the mounting portion of the lift 36 and the rocker of the coupler 37 are connected to each other. The dynamic support shaft 41 is disposed on the front side of the vehicle from the rearmost position of the rear wheels 4, 4, and the overall length of the vehicle is shortened, thereby making it possible to downsize the vehicle.

Further, in the mounting stay 39, a gate-shaped seat stay 43 straddles a hydraulic elevator 36 provided on the upper part 39b of the mounting stay 39, and at both lower portions thereof, both sides 39a, 39 of the mounting stay 39 are mounted.
The seat 13 is provided on rails 43a, 43a, which are attached to the upper part of the casing of the transmission 6 and arranged in the front-rear direction on the upper part of the seat stay 43, so that the seat 13 can be adjusted in its longitudinal position. Thereby, the elevator 36
and the mounting stay 39, and space is used effectively to simplify the structure.

Therefore, in the past, the seat was fixed directly to the top of the transmission casing, so the seat width became wider than the transmission width.
The structure of the seat stay was complicated and the load was concentrated on the mounting part, but by providing the seat stay 43 to which the seat 13 is attached via the mounting stay 39, the weight of the driver is distributed to the casing. I can support it.

In addition, the hydraulic elevator 3 of the rear working equipment mounting device 38
The cylinder body 36b of No. 6 is the same as the cylinder body 33b of the hydraulic elevator 33 of the front work equipment mounting device 35, and this cylinder body 36b
is the mounting stay 3 for the rear work equipment mounting device 38.
A cylindrical cylinder part 36c having a flat part on the lower side to be fixed to the upper part 39b of the cylinder part 9, a bottom part formed on the front side of the vehicle body, and arranged approximately horizontally;
A piston 36e is slidably inserted into the cylinder part 36c, and a shaft 36f is rotatably mounted horizontally in the bearing part 36d. support,
An arm 36g connected to the rod of the piston 36e is housed in the shaft 36f by serration connection, and a proximal end of the link mechanism 36a is provided at both ends of the shaft 36f extending to both sides outside the bearing portion 36d. The lift arm 36h is arranged in a serration-coupled manner, and the cylinder body 36
The opening on the side of the bearing portion 36d of b is liquid-tightly closed by a lid, and the inside of the cylinder body 36b is filled with lubricating oil to a depth that does not submerge the rod of the piston 36e, so that it does not rotate during operation. The lubricating oil is splashed up by the tip of the arm 36g to lubricate the rotating portion within the bearing portion 36d. (See Figure 4).

In addition, by operating the hydraulic operating lever 44 disposed on the right side of the seat 13 to the upward side, the oil pump 4 disposed below the seat stay 43 can be operated.
5 is activated to supply hydraulic oil from the oil tank 46 into the cylinder portion 36c through the pressure hose 47, and the hydraulic pressure pushes the piston 36e toward the rear of the vehicle body to rotate the arm 36g.
The lift arm 3 of the link mechanism 36a is connected by serration to the shaft 36f which is rotationally driven by 6g.
By rotating 6h upward, the coupler 37 that connects the working machines is raised.

Furthermore, by operating the hydraulic operating lever 44 in the downward direction, the lift arm 36h is rotated downward by the weight of the coupler 37 and the work equipment, and the piston 36e is pushed forward of the vehicle body, thereby pushing the cylinder portion 36c.
The hydraulic oil inside is returned to the oil tank 46 through the control valve A, and the coupler 37 is slowly lowered.

Further, in order to raise and lower the front work equipment mounting device 35 provided at the front of the vehicle body, the hydraulic pressure is switched to the front side using a front/rear hydraulic pressure switching lever 48 disposed in front of the hydraulic operating lever 44. This is done by operating the rear working equipment attachment device 38 in the same manner as the operation.

In addition, the left side of the seat 13 (upper side in Fig. 2)
There is a PTO operating lever 49 and a driving gear shift lever 5.
0 and an auxiliary gear shift lever 51 for driving are provided respectively, 52 is a fender provided on each of the front wheels 3, 3 and rear wheels 4, 4, and 53 is a vehicle safety part such as a tail lamp 54 and a license plate 55. This is a stay for installation.

By attaching the work equipment mounting device using the above-described mounting structure, the weight of the work equipment and coupler is distributed and supported by the transmission via the mounting stay, which reduces the weight of the casing of the transmission. In addition, a hydraulic lift can be installed on the top of the mounting stay, and the seat can be easily and firmly mounted to the mounting stay via the seat stay, and the driver riding on the seat can The body weight can also be distributed and supported by the transmission via the mounting stay.

Furthermore, although this embodiment has been described with respect to a riding working machine for agricultural use, it is also suitable as a mounting structure for a working machine attachment device of a riding working machine for pasture work, construction/civil engineering work, snow removal work, etc.

[Effect of idea]

As explained above, in the present invention, a mounting stay made by bending a steel plate into a gate shape is disposed so as to straddle the rear part of the frame of a riding work machine, and is supported on the transmission at multiple locations. A seat is disposed above the transmission, the coupler is attached to the rear side of the vehicle body of the mounting stay so as to be swingable in the vertical direction, and the elevator is attached to the upper surface of the mounting stay, and from a side view of the vehicle, The mounting part of the elevator and the swinging shaft of the coupler are located toward the front of the vehicle from the rearmost positions of the rear wheels located on both sides of the transmission, so that they can be easily moved when towing and lifting work equipment. The weight of the work equipment mounting device and the work equipment, which is sometimes applied to the transmission, can be dispersed by the mounting stay and supported on the transmission casing. The mounting device can be firmly attached to the vehicle body, the weight of the vehicle can be reduced, and the vehicle can be made smaller and simpler.

Furthermore, in the above configuration, the space can be made more efficient by arranging the elevator between the seat and the mounting stay, or by arranging a rear wheel steering tie rod between the mounting stay and the rear wheel. This can be used to simplify the process.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a sectional front view of an agricultural riding working machine, Fig. 2 is a plan view, Fig. 3 is a partially sectional left side view, and Fig. 4 is a partially sectional left side view. The figure is an enlarged sectional front view of the hydraulic elevator of the rear working equipment mounting device. 1... Riding work machine, 2... Main frame, 3
...Front wheel, 4...Rear wheel, 5...Engine, 6...
Transmission, 7...First propeller shaft, 9...Second propeller shaft, 13...Seat, 19...Tie rod for rear wheel steering, 36...Hydraulic elevator, 37...Coupler, 38... Rear work equipment mounting device, 39... Mounting stay for front work equipment mounting device, 41... Swing shaft, 43... Seat stay.

Claims (1)

[Claims for Utility Model Registration] 1. A transmission is provided at the rear of a frame arranged in the front-rear direction of the vehicle, at a central position with respect to the left and right sides of the vehicle body, and a coupling device for connecting working equipment and driving the coupling device up and down. In a riding work machine in which a work equipment mounting device having a lift is attached to the rear of the vehicle body, a mounting stay made by bending a steel plate into a gate shape is arranged so as to straddle the transmission. A seat is disposed above the transmission, and the coupler is attached to the rear side of the vehicle body of the mounting stay so as to be swingable in the vertical direction, and the elevator is mounted on the top surface of the mounting stay. installation,
When viewed from the side of the vehicle, the mounting portion of the elevator and the swinging shaft of the coupler are arranged on the front side of the vehicle from the rearmost position of the rear wheels arranged on both sides of the transmission. Mounting structure for mounting equipment on riding work equipment. 2. The mounting structure for a work equipment mounting device for a riding work machine according to claim 1, wherein the elevator is disposed between the seat and the mounting stay. 3. Utility model registration claim 1 or 2, characterized in that a rear wheel steering tie rod is disposed between the mounting stay and the rear wheel.
Mounting structure for a work equipment mounting device for a riding work machine as described in 2.