JP2882735B2 - Passenger work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a riding work machine in which another working machine is connected to a passenger vehicle such as a self-propelled working machine.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 45-15043 and U.S. Pat.
The one disclosed in Japanese Patent No. 600070 is known.
In the former, a cultivator is connected to the tail of a tractor via a chain case, and raising and lowering of the cultivator is performed by raising and lowering an arm by a hydraulic device provided in the tractor. In the latter, the working machine is connected to the rear end of the tractor via a frame, and the driving force of the engine is transmitted to the working machine via a pulley and a belt.

[0003]

When another working machine is connected to the front end or the rear end of the riding work machine, the connected working machine is moved up and down with respect to the riding work machine so as to cross a ridge or the like in a field. There must be. U.S. Pat. No. 460,070 does not show a lifting mechanism for this purpose.

Further, Japanese Patent Publication No. 45-15043 discloses an elevating mechanism, which is provided on the side of a passenger vehicle. Therefore, when another working machine is connected to an existing tractor or riding work machine, it cannot be used as it is, and a new dedicated lifting mechanism must be provided for the tractor or riding working machine.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a passenger vehicle which is driven by an engine driving force and has a driving force take-out portion for taking out the driving force of the engine for work other than running. And a working machine connected to the passenger vehicle, wherein the working machine is provided on a connecting frame that is detachable from the passenger vehicle so that the working machine body can be moved up and down. It provided a submission for transmitting and cylinder unit for raising and lowering the working machine body, a driving force from the passenger sides of the driving force output portion to the machine body to further the sheet
The Linda unit is supported rotatably with respect to the connection frame
One end is connected to the intermediate frame, and the working machine
The main body is centered on the intermediate frame and the rotation axis of the intermediate frame.
Supported by a rotatable support frame,
The work machine body is lowered between the intermediate frame and the support frame.
Escape to the upper part of the work machine body
The work machine body falls below the work machine body at the raised position
The first feature is that a part of it contacts so as to prevent
And

[0006] A second aspect is that the drive power take-out shaft of the transmission and the rotation center axes of the intermediate frame and the support frame are arranged at the same position when viewed from the side .
Features .

Further, the working machine is a rotary working machine,
This rotary working machine has a first rotary claw that rotates in the same direction as the traveling direction of the riding work machine and a second rotary claw that rotates in the opposite direction. The axes of the first rotary claw and the second rotary claw are side The third feature is that they are arranged at the same location as viewed from the side.

[0008] An intermediate shaft for transmitting the driving force from the engine to the traveling transmission input shaft is provided at the driving force extracting portion on the passenger vehicle side, and the intermediate shaft is provided on the first working machine on the passenger vehicle side. A fourth feature is that a pulley or a gear for transmitting a driving force is fixed to a second working machine connected to the vehicle and a passenger vehicle via a connecting frame.

[0009]

When the working machine is used, the working machine is lowered by the elevating device. When the working machine is not used for only a short time, the working machine is raised by the elevating device, and when the working machine is not used for a long time. Remove the working equipment together with the connection frame.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a side view of the riding work machine according to the present invention, FIG. 2 is a plan view of the riding work machine, FIG. 3 is a side sectional view of a connecting portion between the riding vehicle and the working machine, and FIG. FIG. 5 is an exploded perspective view of a connecting frame, an elevating cylinder, an intermediate frame, and a support frame of the connecting portion of the working machine, and FIG. 6 is an enlarged sectional view taken along line AA of FIG. 7 is a longitudinal sectional view of a rotary working machine as a working machine.

The passenger work machine 1 comprises a passenger vehicle 10 and a work machine 50.
(For example, a rotary working machine, a working machine for grass and lawn mowers, a working machine for snow removal, a trencher, etc.). The passenger vehicle 10 includes a steering wheel 11, a seat 12, an engine 13, a transmission case 14, a front wheel 15, a rear wheel 16, and a cutter housing 17 disposed between the front wheel 15 and the rear wheel 16 and below the floor of the vehicle. . The vehicle 10 is a vehicle for a riding lawn mower (riding mower) in which the cutter housing 17 is disposed below the vehicle, and the height of the vehicle is low. A rotary work machine is mounted behind the riding mower. In some cases, only the rotary work is performed with the cutter housing removed.

Further, the passenger vehicle 10 is provided with a driving force take-out section 20 for taking out a driving force for work. This take-out part 2
Reference numeral 0 denotes a driving force take-out unit 20 provided on the side of the transmission case 14 located between the rear wheels 16 of the vehicle 10.
1 to 4, an intermediate shaft 21 is vertically arranged as shown in FIGS. 1 to 4, and an upper end of the intermediate shaft 21 meshes with a transmission input shaft 23 via a bevel gear 22.
Has an upper pulley 24, a middle pulley 25, and a lower pulley 2
6 is fitted.

An upper pulley 24 and a pulley 28 fitted to an output shaft 27 (also referred to as a crankshaft) protruding downward from the engine 13 located above the vehicle 10 below the seat 12 provided at the upper center of the vehicle 10. Between the belt 29
And the driving force of the engine 13 is transmitted to the intermediate shaft 21 via the upper pulley 24. Then, bevel gear 2
2, the driving force of the engine 13 is transmitted to the input shaft 23 of the transmission, the rear wheel 16 rotates through the transmission (not shown) in the transmission case 14, and the riding work machine 1 travels.

On the other hand, the middle pulley 25 is connected to a working machine 5 described later.
The driving force is transmitted to the 0-side transmission, and the lower pulley 2
A belt 31 is stretched between the pulley 6 and the pulley 30 protruding from the cutter housing 17 to transmit the driving force of the engine 13 to the cutter blade via the lower pulley 26.

As described above, one intermediate shaft 21 is attached to the rear wheel 16.
The upper stage pulley 24 that transmits the driving force to the vehicle, the middle stage pulley 25 that transmits the driving force to the working machine 50, and the lower stage pulley 26 that transmits the driving force to the working machine (cutter) 17 of the passenger vehicle 10 are attached to simplify the structure. Can be achieved.

Next, the working machine 5 connected to the passenger vehicle 10
0 will be described in detail. The work machine 50 includes a rotary work machine 51 (tilling machine) as a work machine body, and a connection frame 52 that connects the rotary work machine 51 to the passenger vehicle 10.
And the connecting frame 52 is composed of a plurality of plates as shown in FIG. The connecting frame 52 is detachable from the passenger vehicle 10 via bolts, and has a lifting device 53 and a submission case 54 mounted thereon.

The elevating device 53 has an electric motor 55M disposed above and a gear oil pump 55P disposed below. The hydraulic device 55 drives the pump 55P forward and reverse by forward and reverse rotation of the motor 55M, and the hydraulic device 55 operated by the hydraulic device 55. The double-acting hydraulic cylinder unit 56 has a rod tip connected to an intermediate frame 58 that rotates vertically about a horizontal shaft 57 provided on the connecting frame 52. A support frame 59 for supporting the rotary working machine 51 is provided at 57.
Is also rotatably mounted. A part of the support frame 59 is in contact with the intermediate frame 58 from the rear side. 56R is a reservoir tank for adjusting the internal pressure of the hydraulic cylinder.

When the electric motor 55M rotates in one direction, the gear oil pump 55P rotates, and oil enters the lower chamber of the hydraulic cylinder unit 56, whereby the rod of the hydraulic cylinder unit 56 extends. Thus, when the double-acting hydraulic cylinder unit 56 is extended, as shown in FIG. 3, the rotary working machine 51 is at the lowered position, that is, the working position. , Only the support frame 59 rotates, and the rotary work machine 5
1 can rotate upward and escape.

Further, from the above state, the electric motor 55
When M is rotated in reverse, the oil pump also rotates in reverse. When the rod of the hydraulic cylinder unit 56 is contracted by introducing oil into the upper chamber of the hydraulic cylinder unit 56, the intermediate frame 58 is rotated counterclockwise around the horizontal shaft 57 in FIG. Rotate in the direction. Then, the support frame 59 which is in surface contact with the intermediate frame 58 is also pushed up, and the rotary working machine 5
1 rises to the position shown by the imaginary line in FIG. Since the intermediate frame 58 and the support frame 59 have the same horizontal shaft 57 as the center of rotation, the rotary work machine 51 is prevented from falling downward.

On the other hand, as shown in FIGS. 3 and 6, a shaft 60 is inserted from below into a transmission case 54 mounted above a rear portion of a plate 52P forming a horizontal surface of the connecting frame 52. Pulley 6 at lower end
A belt 62 is stretched between the pulley 61 and the intermediate pulley 25 on the passenger vehicle 10 side.
Is transmitted to the transmission side.

Further, a bevel gear 64 meshing with a bevel gear 63 at the upper end of the shaft 60 is provided in the transmission case 54.
And the power take-out shaft 65 is rotated by the bevel gear 64. The power take-out shaft 65 projects to the side of the connecting frame 52 and
5, the rotation of the first chain 66 (see FIG. 4) and the transmission shaft 67.
Then, the power is transmitted to the rotary work machine 51 via the second chain 68 (see FIG. 7). 66C is the first chain 66
It is a chain case cover that covers.

In this embodiment, the power take-out shaft 65 and the horizontal shaft 57, which is the center of rotation of the intermediate frame 58 and the support frame 59, are arranged at the same position when viewed from the side. There is no disadvantage such as loosening of the chain when the rotary working machine 51 is raised or lowered, and the structure is simplified.

Next, the structure of the rotary working machine 51 will be described with reference to FIG. In the figure, reference numeral 70 denotes a gear case, and the gear case 70 is attached to the support frame 59. A horizontal shaft 71 is rotatably supported through the gear case 70, and a sprocket 72 is fixed to the horizontal shaft 71. The horizontal shaft 71 is rotated by the second chain 68 via the sprocket 72.

At both ends of the horizontal shaft 71, a hollow shaft 73 is fixed by bolts so as to rotate integrally with the horizontal shaft 71, and the hollow shaft 73 rotates on the hollow shaft 73 in the same direction as the traveling direction of the riding work machine 1. One rotary claw 74 is attached.

On the other hand, an intermediate shaft 75 is rotatably housed in the gear case 70, and another sprocket 76 is fixed to the horizontal shaft 71. The sprocket 76 and the sprocket 77 fixed to the intermediate shaft 75 are chained. So that the intermediate shaft 75 is rotated.
Is transmitted through gears 78 and 79 to a collar 80 rotatably provided on the outer periphery of the horizontal shaft 71.

Thus, the collar 80 rotates in the direction opposite to the horizontal axis 71. The collar 80 is provided with a second rotary claw 81 that rotates in a direction opposite to the traveling direction of the riding work machine 1.

As described above, by providing the rotary claws 74 and 81 rotating coaxially in opposite directions, the dashing phenomenon can be suppressed. In particular, in the present embodiment, since the work machine 50 is connected to the passenger vehicle 10 via the connection frame, the generated torque increases, but the forward torque and the rearward torque are offset. This is extremely advantageous.

When the above-mentioned riding work machine is used in an orchard or the like, the driving force of the engine is transmitted to the cutter of the passenger vehicle and also to the rotary claw of the working machine.
This makes it possible to simultaneously and continuously cut the weeds and the like to a predetermined height and plow the ground. When the rotary work machine is not used only for a short period of time to move in the fields, the work machine is raised by the elevating device, while when not used for a long time, the work machine is removed from the connecting frame part. deep. In some cases, the cutter part is removed and the tilling work is performed only with the rear working machine.

[0029]

As described in the first aspect, the connecting frame can be attached to and detached from the passenger vehicle of the passenger working machine comprising the passenger vehicle and the working machine connected thereto. cylinder Uni for body and movable up and down, lifting and lowering the working machine body further connecting frame
And Tsu DOO, since the driving force from the passenger sides of the driving force output portion provided with a submission to transmit to the working machine body, it is possible to the structure of an existing vehicle as it is attached to various working machines. Further, since the cylinder unit and the transmission are not provided on the passenger vehicle side, there is no waste of traveling with the cylinder unit and the transmission attached when the work implement is not used. Further, the working machine body is supported by the intermediate frame and a support frame that is rotatable about the rotation axis of the intermediate frame, and the intermediate frame and the supporting frame are positioned at a position where the working machine body is lowered. With a simple structure, the work machine can get on foreign objects by contacting a part of the work machine body so that it can escape upward and prevent the work machine body from dropping downward at the raised position. Can be dealt with.

According to a second aspect of the present invention , the drive power take-out shaft of the transmission and the rotation center axes of the intermediate frame and the support frame are arranged at the same position as viewed from the side, thereby simplifying the structure. Can be planned.

According to a third aspect of the present invention, the rotary working machine is provided with a first rotary claw rotating in the same direction as the traveling direction of the riding work machine and a second rotary claw rotating in the opposite direction. Disadvantage of connecting the rotary working machine to the passenger vehicle via the connecting frame by arranging the claw and the axis of the second rotary claw at the same position when viewed from the side, that is, when the connecting frame is interposed, Although the distance from the passenger vehicle is increased, a dashing phenomenon (a phenomenon in which the working machine jumps due to a force received from the ground when the rotary claw rotates) is likely to occur. The force is almost offset, the dashing phenomenon is almost eliminated, and an excessive impact is not applied to the connecting frame or the vehicle.

According to a fourth aspect of the present invention, an intermediate shaft for transmitting the driving force from the engine to the traveling transmission input shaft is provided at the driving force extracting portion on the passenger vehicle side, and the first shaft on the passenger vehicle side is provided on the intermediate shaft. The structure can be simplified by fixing a pulley or a gear for transmitting the driving force to the second working machine connected to the working machine and the passenger vehicle via the connecting frame.

[Brief description of the drawings]

FIG. 1 is a side view of a riding work machine according to the present invention.

FIG. 2 is a plan view of the riding work machine.

FIG. 3 is a side cross-sectional view of a connecting portion between a passenger vehicle and a working machine.

FIG. 4 is a plan view of a connecting portion between the passenger vehicle and the working machine.

FIG. 5 is an exploded perspective view of a connection frame, a lifting cylinder, an intermediate frame, and a support frame.

FIG. 6 is an enlarged sectional view taken along line AA of FIG. 3;

FIG. 7 is a longitudinal sectional view of a rotary working machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Passenger working machine, 10 ... Passenger vehicle, 13 ... Engine, 1
4: Mission case, 20: Drive power take-out part, 21:
Intermediate shaft, 23 ... Upper pulley, 24 ... Middle pulley, 25 ...
Lower pulley, 50: working machine, 51: basic working body (rotary working machine), 52: connecting frame, 53: elevating device, 5
4 ... Submission case, 56 ... Double acting hydraulic cylinder unit, 57 ... Horizontal axis, 58 ... Intermediate frame, 59 ...
Support frame, 74, 81 ... rotary claw.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-81702 (JP, A) Japanese Utility Model 5-1 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A01B 59/042 A01B 33/08 A01B 71/02 B60K 17/28

Claims (4)

(57) [Claims] 1. A passenger vehicle having a driving force take-out portion that runs with the driving force of an engine and extracts the driving force of the engine for work other than traveling, and a working machine coupled to the passenger vehicle. In the riding work machine, the working machine is provided on a connecting frame detachable from the passenger vehicle such that the working machine body can be moved up and down, and the connecting frame is provided with a cylinder unit for moving the working machine body up and down.
And bets, and a submission for transmitting a driving force from the passenger sides of the driving force output portion to the work machine body is provided, the further <br/>, the cylinder unit is pivoted relative to the connecting frame
One end is connected to the freely supported intermediate frame,
The work machine body is configured to rotate the intermediate frame and the intermediate frame.
Supported on a support frame that is rotatable about the moving shaft
The intermediate frame and the support frame are
Escape above the work machine body is possible when the body is lowered
At the position where the work machine body is
A riding work machine characterized in that a part of the work comes into contact so as to prevent the fall to the other side . 2. The drive power take-out shaft of the transmission and the rotation center axes of the intermediate frame and the support frame are arranged at the same position when viewed from the side.
The riding work machine according to claim 1 . 3. The work machine is a rotary work machine having a first rotary claw that rotates in the same direction as a traveling direction of a riding work machine and a second rotary claw that rotates in the opposite direction. The riding work machine according to claim 1, wherein the shafts of the first rotary claw and the second rotary claw are arranged at the same position as viewed from the side. 4. An intermediate shaft for transmitting a driving force from an engine to a traveling transmission input shaft is provided at the driving force extracting portion on the passenger vehicle side, and the intermediate shaft is provided with a first working machine on the passenger vehicle side. A pulley or a gear for transmitting driving force to a second working machine connected to the vehicle and a passenger vehicle via a connecting frame is fixedly attached.
A riding work machine according to item 1.