JPH0446494Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Application This invention relates to a working machine vertical movement device for an elevated work vehicle that performs ridge work for planting tobacco seedlings and the like.

BACKGROUND ART Conventionally, the vertical movement of a working machine in an elevated work vehicle is generally performed using a three-point linkage device.

In addition, there is also one in which a working machine is connected to the lower end of a threaded rod disposed in a vertical direction, and the working machine is moved up and down by rotating the threaded rod.

Problems to be Solved by the Invention When moving a work machine up and down using a three-point linkage device, if the work machine is placed approximately at the center in the longitudinal direction between the front wheels and the rear wheels, the distance between the wheel base and the tread distance will be As a result, the turning radius becomes larger, making it impossible to reduce the headland required for elevated work vehicles when turning, and
Balance performance deteriorates on slopes, and it becomes difficult to perform stable ridge filling work.

On the other hand, when moving the work equipment up and down by rotating the threaded rod, if excessive force is applied to the work equipment by stones etc. during ridge filling work, the threaded rod is likely to bend or deform. If this occurs, there is a disadvantage that the work equipment cannot be raised or lowered.

Means for Solving the Problems A working machine is disposed approximately in the center of the elevated working vehicle in the longitudinal direction, and the elevated working vehicle is provided with a support frame extending upward. A telescoping member is disposed parallel to the support frame, and the upper end of the telescoping member is connected to the upper end of the support frame, and the working machine is connected to the lower end of the telescoping member.

Function: By expanding and contracting the expandable member, the working machine is raised and lowered in the vertical direction along the support frame, and the position of the working machine is moved in the vertical direction.

Embodiment An embodiment of this invention will be described based on the drawings. First, an engine 2 is mounted on the rear of a body 1 of a four-wheeled elevated work vehicle that travels on the ground, and a transmission case 3 is fixed to the bottom of the engine 2. 4
is fixed. An axle 5 extending in the left-right direction is provided at the lower end of the transmission case 3;
Upper end portions of a pair of left and right transmission cases 6 are connected to both ends of the axle 5 so as to be rotatable about the axis of the axle 5 . A rotating shaft 7 connected to the axle 5 via a sprocket and a pulley (not shown) is provided at the lower end of the transmission case 6, and a rear wheel 8 is connected to the rotating shaft 7.

A main tower 9, which is a support frame extending upward, is fixed to the front end of the chassis 4, and a step 10 extending forward is fixed to the lower end of the main tower 9. A panel cover 11 and a sheet 1 are placed on the step 10.
2 is attached, and furthermore, a brake pedal 13 and a clutch pedal (not shown) are arranged. A handle 14, an accelerator lever 15, and a hydraulic lever 16 are arranged on the upper surface of the panel cover 11, and a front wheel steering device 17 is arranged below the step 10 when the handle 14 is rotated.
A front wheel steering device 19 is provided for steering the front wheels 18 in any direction via the front wheels.

Next, a pair of upper and lower stays 20 are fixed to the main tower 9, and these stays 20
A sub-tower 22 parallel to the main tower 9 is held by a pair of front and rear rolling rollers 21 so as to be slidable in the vertical direction. A rearwardly extending frame 23 is fixed to the lower end of the sub-tower 22, and an intercultivation rotary 24, which is a working machine including a transmission case, a rotor, a ridge shaper, etc., which will be described later, is connected and fixed to this frame 23. ing.
First, a mission case 25 is fixed to the front part of the frame 23, and a hitch 26 is fixed to the rear end of the frame 23. A tilling shaft 27 extending in the left-right direction is provided at the lower end of the mission case 25, and a rotor 28 is connected to the tilling shaft 27 by a connecting pin (not shown). A T-shaped bar 29 is inserted and fixed into the hitch 26 so as to be vertically adjustable, and a pair of left and right ridge shapers 30 are fixed to the lower end of the T-shaped bar 29.

Next, a subframe 31 is connected between the upper end of the main tower 9 and the rear part of the chassis 4, and a mounting stay 32 fixed to the subframe 31 is equipped with a hydraulic cylinder, which is a telescopic member. The upper ends of 33 are connected. This hydraulic cylinder 33 is arranged approximately parallel to the main tower 9, and the lower end of the hydraulic cylinder 33 is attached to a mounting stay 3 fixed to the upper end of the transmission case 25.
It is connected to 4.

A tension roller 37 applies tension between the engine pulley 35 attached to the engine 2 and the machine pulley 36 attached to the transmission case 3 to transmit power.
A belt 38 is wound around it. Further, a hydraulic pump 39 is fixed to the chassis 4, and the hydraulic pump 39 and the engine 2 are connected by a V-belt 40 for power transmission. Note that a hydraulic pipe (not shown) is connected between the hydraulic pump 39 and the hydraulic cylinder 33 via a valve (not shown). Further, the output shaft (not shown) of the transmission case 3 is connected to the transmission case 25.
A propeller shaft 41 for power transmission is connected between the input shaft (not shown) of the input shaft (not shown).

Next, a multi-sheet covering device 46 consisting of a multi-sheet 42, a guide roll 43, a treading wheel 44, a soil-covering disk 45, etc. is attached to the upper part of the T-shaped lever 29.

In such a configuration, when the aircraft 1 moves forward (in the direction of arrow a), the power from the engine 2 is transmitted to the transmission case 25 and the tilling shaft 27 via the propeller shaft 41, and the rotor 28 moves in the direction of arrow b. Rotate. As a result of this rotation, the soil on the ground surface is tilled and accumulated inside the transmission case 25, and the ridges are shaped by the ridge shaper 30 located behind the rotor 28.

On the other hand, the hydraulic pump 39 is rotated by the power from the engine 2, and the hydraulic cylinder 33 is expanded and contracted by switching the hydraulic lever 16. As the hydraulic cylinder 33 expands and contracts, the intermediate tiller 24 vertically moves integrally with the frame 23 and sub-tower 22. During the ridge filling work, the hydraulic cylinder 33 is extended to move the intercultivation rotary 24 downward, thereby causing the intercultivation rotary 24 to interfere with the ground surface. Further, when the ridge filling work is interrupted or when turning at the edge of the field, the hydraulic cylinder 33 is retracted to move the intercultivation rotary 24 upward and away from the ground surface. Note that the height of the ridges to be formed is adjusted by adjusting the amount of downward movement of the intermediate tillage rotary 24.

Here, the intercultivation rotary 24 is vertically movable along the main tower 9, and the intercultivation rotary 24 can be vertically moved within a narrow space. Therefore, there is almost no increase in the distance between the wheel bases or the distance between the treads due to the installation of the interpolation rotary 24, and the machine body 1 is downsized, the turning radius is reduced, and the headland is reduced.
Furthermore, the upper end of the hydraulic cylinder 33 is connected to the sub-frame 25, and the lower end of the hydraulic cylinder 33 is connected to the intertilling rotary 24,
It is structurally simple. Therefore, the loss of mechanical efficiency of the power from the engine 2 is reduced,
Production costs are reduced and ease of maintenance, inspection, etc. is improved. Further, even if a large force is applied to the ridge shaper 30 or the like, the work can be continued without causing any trouble to the vertical movement function of the intertilling rotary 24, unlike in the conventional example using a threaded rod.

Note that in this embodiment, the hydraulic cylinder 33 was used as the telescopic member;
3, an electric reversible motor or the like may be used.

Effects of the invention As described above, this invention connects the upper end of a telescoping member that can be expanded and contracted in the vertical direction to the upper end of the support frame, and connects a working machine to the lower end of the telescoping member, thereby allowing the telescoping member to expand and contract. By moving the work equipment up and down, the work equipment can be moved up and down in a narrow space, making it possible to install the work equipment without increasing the distance between the wheelbases or the treads. Therefore, it is possible to reduce the size of the elevated work vehicle with a four-wheel body, and also to reduce the turning radius and narrow the headland at the edge of the field. This has the advantage of simplifying the structure, reducing production costs, and increasing the mechanical efficiency of the power used to move the working machine up and down.

[Brief explanation of drawings]

The drawing shows one embodiment of this invention.
The figure is a side view showing the state of ridge filling work, FIG. 2 is a plan view, and FIG. 3 is a side view showing the state where the intertilling rotary is raised. 9... Main tower (support frame), 24...
...Intertilage rotary (working machine), 33... Hydraulic cylinder (extendable member 9).

Claims (1)

[Scope of utility model registration request] In an elevated work vehicle having a four-wheeled vehicle body, a work implement is disposed approximately in the center of the elevated work vehicle in the longitudinal direction, and a support frame extending upwardly is fixed to the elevated work vehicle, so that the work machine is extendable and retractable. Elevated type work characterized in that a member is arranged parallel to the support frame, the upper end of the telescopic member is connected to the upper end of the support frame, and the working machine is connected to the lower end of the telescopic member. Vehicle work equipment vertical movement device.