JP3166191B2 - Mower collector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a collector for accommodating turf grass cut by a mower, and more particularly to a mechanism for lifting and dumping a collector on a vehicle body by a simple mechanism.

[0002]

2. Description of the Related Art In a mode in which a dumping action of a collector is performed, simply turning the collector with respect to a vehicle body in order to obtain a lift at an outlet of the collector requires a simple operation. If the collector is lifted by a parallel link, a cross link, or the like, the lift cylinder for lift and the dump cylinder for dumping the collector are separately provided, and the configuration becomes complicated.

[0003] In general, in the case of turfgrass and pasture harvesting such as mowers, the lift of the collector must be extremely high, whereas the overall length of the mower must be as short as possible to facilitate workability. desirable. Also,
When increasing the lift of the collector, open and close the lid at the rear of the collector.
Is turned downward, the opening / closing lid is
If the turfgrass is not open or closed,
The opening and closing lid is pushed open, and the turf grass spills on the way up
However, there was a risk of scattering around the collector on the ground.

[0004]

According to the present invention, a collector 2 is provided.
The hinge 17 as a fulcrum of the bending link 4 and a fixed length link 5 to the front lower portion disposed in a front side position of the collector 2 bottom with lid 1 on the rear side, vertically rotatably relative to the vehicle body 3 pivoted at the end after the bending link 4 of bendable been supported
The rear position of the bottom of the collector 2 is fixed to a fixed length link 5.
Pivotally at the end after a base link portion 7 of the bending link 4 by extending the lift cylinders 6, the fixed length link 5, the collector 2 is moved upward upwardly rearward together distal portion and a collector 2 By lifting the fixed link 5 to a high position and restricting the upward movement of the fixed length link 5, the refracting link 4 is moved upward to
The mower collector is characterized in that a dump is performed.

[0005]

When the lift cylinder 6 is shortened, the refracting link 4 and the fixed length link 5 move down, and the collector 2 is placed on the vehicle body 3 with the rear opening / closing lid. 1 is also in the closed state, and when mowing is performed by mower, the cut grass is carried in and stored.

During the dumping operation of the collector 2, the lift cylinder 6 is extended. When the base link portion 7 of the refraction link 4 is rotated upward by the lift cylinder 6, at the initial stage of the ascent, the refraction link 4 is not sufficiently developed. To raise. When the collector 2 is raised to a predetermined position, the rising of the fixed length link 5 is restricted, so that the rear end side of the bottom of the collector 2 stops at this raised position, and the supporting portion of the tip of the fixed length link 5 is pivotally supported. The front end side, which is a pivot portion of the refraction link 4, is rotated upward, whereby the refraction link 4 is developed, the collector 2 is inclined backward, and the opening / closing lid 1 side is opened downward to accommodate the grass. Is discharged backward.

In this manner, the bottom of the collector 2 is connected to the front hinge.
17 while supported by the fixed length link 5 and the bending link 4, since the bending link 4 and the fixed-length links 5 in which at the same time to lift the rear portion of both linked by Shin beauty of the lift cylinder 6, the collector 2 during lifting Side view posture
Put the rear wall first so that the load of the storage
You can move upward to a predetermined position in, a further of the lift cylinder 6
The damp action of the collector 2 can also be performed by the elongation , and the contents are discharged downward by opening the open / close lid 1.
Can be configured can be simplified, as a fulcrum rear of the dump collector 2 is finally co <br/> collector 2 bottom, because it sets the high lift position, accurately perform the dumping to a more distant rearward from the vehicle body 3 Can be made.

[0008]

1 to 3, a vehicle body 3 has a cockpit 8, a steering wheel 9 and the like at a front portion, an engine 10 at a rear portion, a front wheel 11, and a steerable rear wheel. The mower 13 is connected to the front, and the grass cut by the mower 13 is collected by a shooter, a blower, or the like.
It is configured to be housed in the rear collector 2.

The collector 2 located on the engine 10 at the rear of the vehicle body 3 is formed in a hook shape so as to extend from the upper side to the rear side of the engine 10, has a discharge port 14 on the rear end face, and has an upper end edge. An openable and closable lid 1 is provided around the hinge 15 so that the openable and closable lid 1 can be opened and closed.
When the pressure of the turfgrass etc. inside works, the open / close lid 1
Can be automatically opened.

A link mechanism for supporting the collector 2 includes:
The front end of the fixed length link 5 and the base link 7 having substantially the same length as the fixed length link 5 is pivotally moved up and down by hinges 17 on both left and right sides of the column 16 behind the cockpit 8. Support freely. Each of the left and right base link portions 7 is configured to be moved up and down by a hydraulically expandable and contractible lift cylinder 6 between itself and the vehicle body 3.
The pin 20 is fitted into the long hole 19 of the fixed length link 5 to lock the upper limit and the lower limit of the rotation of the fixed length link 5 at a fixed position.

The fixed length link 5 is provided at the rear end of the bottom of the collector 2.
The ends are vertically rotatably connected by hinges 21, and an end link 23, which can be freely bent up and down by hinges 22 with respect to the distal end of the base link 7, is hinged to the rear of the bottom of the collector 2.
Are connected by The bending link 4 is composed of the base link 7 and the end link 23. When the bending link 4 is lowered to the lower limit position, the bending angle of the end link 23 with respect to the base link 7 is small, Front and rear hinges 21 and 24 formed by these fixed length links 5 and end links 23.
Is located in a horizontal position in the front-rear direction, and is in a posture in which the collector 2 is brought close to the vehicle body 1 to receive turfgrass (FIG. 3).

When dumping after storing the turfgrass, the collector 2 is raised by the fixed length link 5 as the base link 7 of the refraction link 4 is raised by extending the lift cylinder 6 (FIG. 1). 2). When the fixed length link 5 rises, the pin 20 is locked at the upper end of the long hole 19,
Since the refraction link 4 continues to rise further, the end link 23
Is pulled up, and the collector 2 is turned around the hinge 21 and dumped backward and downward. The stored turfgrass is discharged by opening the open / close lid 1 of the discharge port 14. At this time, the collector 2 has a hinge 2 at the rear end of the fixed length link 5 at the bottom rear end.
1 and is pivoted rearward around the hinge 21, the position of the discharge port 14 is high, and the state is extended rearward (FIG. 1).

FIG. 4 shows a hydraulic circuit in which the collector 2 is lifted and dumped using the lift cylinder 6 and the dump cylinder 25. The lift cylinder 6 is of a single-acting type, and the dump cylinder 25 is of a double-acting type, and communicates with the hydraulic pump P, the elevating control valve 28 and the like via the sequence valves 26 and 27, and moves the elevating control valve 28 to the ascending position. By the operation, the lift cylinder 6 is raised by the operation of the sequence valve 26, and the dump cylinder 25 is operated by the operation of the sequence valve 27 at the collector rising end.
By operating the lift control valve 28 to the lowered position, the dump cylinder 25 is returned, and subsequently, the lift cylinder 6 is returned. The sequence valves 26 and 27 include check valves 29 and 30 and throttle valves 31 and 32 for speed control. 33 is a relief valve, and T is a tank port.

In such a configuration, the lift cylinder 6 and the dump cylinder 25 are controlled by one lift control valve 28 using the sequence valves 26 and 27.
Each cylinder speed can be set optimally, eliminating the need for long stroke cylinders, maintaining rigidity and reducing weight. In FIG. 5, the lift cylinder 6 and the dump cylinder 25 are single-acting cylinders, and a throttle valve 31 for speed control is provided in the circuit of the dump cylinder 25 so that the load applied to the lift cylinder 6 is reduced by the load applied to the dump cylinder 25. By setting lightly, the same function and effect as those of the previous example can be obtained.

In FIG. 6, the lift cylinder 6 is a single-acting type, a pressure release mechanism 34 is used, and the dump cylinder 25 is used.
Is also performed by a single lift control valve 28. In the lift cylinder 6, a check valve 36 and a pressure release pin 37 are provided on a piston 35, and the tank port T side circuit between the lift cylinder 6 and the dump cylinder 25 can be switched in conjunction with the elevation control valve 28. A check valve 38 is provided. 39 is an O-ring of the piston 35.

When the dump operation by the dump cylinder 25 is not performed, the check valve 38 is set to the tank port T.
When the lift control valve 28 is switched to the lift position in the open state, the lift cylinder 6 moves up and down but the dump cylinder 25 does not operate. When the dump operation by the dump cylinder 25 is also performed, the check valve 38 is used.
Is closed, and when the lift cylinder 6 reaches the rising end, the pressure release pin 37 opens the check valve 36, the hydraulic pressure flows to the dump cylinder 25, and the dump action is performed. The return of the dump cylinder 25 may be performed by returning the piston 40 in the dump cylinder 25 by a return spring 41.

7 to 9, a single spool case 42 has a cylinder port C connected to the lift cylinder 6.
1 and the tank port T1, the cylinder port C2 and the tank port T2 to the dump cylinder 25, and the spool 43 that can be rotated is provided. Are activated separately. P is a pump port, and U is an unload port having an unload valve.

Notches 44 and 45 are formed in the spool 43 to push and pull the spool 43 in the axial direction.
Due to the rotation about the axis, the notch portion 44 can communicate from the pump port P to the cylinder port C1 or C2, or can communicate from the pump port P to the unload port U, and the notch portion 45 The cylinder port C1 can communicate with the tank port T1, the cylinder port C2 can communicate with the tank port T2, and the tank ports T1 and T2 can communicate with the unload port U.

The spool 43 is switched from a neutral position N to a lift position A and a dump position B by operating the operation lever 46 of the operation panel to switch between the neutral position N and the lift position A and the lower position L. To switch. FIG. 7 shows that the pump port P is switched to the cylinder port C1,
The lift cylinder can be expanded and contracted. When the spool 43 is pushed and rotated from this position, it can communicate with the cylinder port C2, and the dump cylinder can be extended and contracted.

[Brief description of the drawings]

 The figure shows an embodiment of the present invention and a related invention.

FIG. 1 is a side view showing the operation.

FIG. 2 is a side view showing the operation.

FIG. 3 is a side view showing the operation.

FIG. 4 is a hydraulic circuit diagram of a related invention.

FIG. 5 is a hydraulic circuit diagram of a related invention.

FIG. 6 is a hydraulic circuit diagram of a related invention.

FIG. 7 is a plan sectional view of a lift control valve according to a related invention.

FIG. 8 is a side sectional view showing the operation.

FIG. 9 is a perspective view of the operation lever.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Opening / closing lid 2 Collector 3 Body 4 Refraction link 5 Constant length link 6 Lift cylinder 7 Base link

Continuation of the front page (56) References US Patent 4,487,007 (US, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A01D 34/63-34/90 A01D 90/00-90/16

Claims (1)

(57) [Claims] A refracting link (4) is provided at a lower front part of a collector (2).
A hinge 17 serving as a swing fulcrum of the fixed-length link 5 is provided, the front side position of the collector 2 bottom with lid 1 on the rear side, the bending link the bendable supported freely vertically pivoted relative to the vehicle body 3 pivotally at the end after 4, side position after the collector 2 bottom
The pivoted at the end after a certain length of the fixed-length link 5, the base link portion 7 of the bending link 4 by extending the lift cylinders 6
The upper end of the fixed length link 5 and the collector 2 are moved upward to raise the collector 2 to a high position, and the upward movement of the fixed length link 5 is restricted, so that the refraction link 4 is moved upward. A mower collector characterized in that the collector is operated to dump the collector.