JPS5831444Y2 - Mobile agricultural machinery lifting device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a working machine elevating device for a mobile agricultural machine such as an agricultural tractor.

Conventionally, when connecting the main body of a mobile agricultural machine and a work machine via a three-point link, the tip of the lift arm of the hydraulic lifting device equipped on the main body of the mobile agricultural machine and the middle part of the lower nonk are connected via a lift rod. It was connected.

However, since the hydraulic lifting device is generally only installed at the rear end of a mobile agricultural machine, the lifting device cannot be used when the working machine is attached to the front of the main body of the mobile agricultural machine.
Additionally, there was no attachment part for the three-point link at the front of the aircraft.

Therefore, conventionally, when attaching a work machine to the front of the machine, for example, the base end of a lift boom etc. was pivotally attached to the side of the machine, and a hydraulic cylinder was attached to raise and lower the boom. It was necessary to install the hydraulic cylinder control mechanism near the driver's seat.

The present invention was developed in view of these circumstances, and has an extremely simple structure that allows the work machine to be easily attached to either the front or rear of the mobile agricultural machine body via a three-point link. This is what I did.

Hereinafter, the present invention will be described in detail based on an embodiment shown in the accompanying drawings.

In the figure, 1 is the main body of a mobile agricultural machine, with an engine 2,
The vehicle is comprised of a front vehicle body 5 equipped with a transmission 3 and a handle 4 as a driving operation mechanism, and a rear vehicle body 6 coupled to the front vehicle body 5 so as to be capable of rolling and yawing.

7 is a driver's seat provided on the front vehicle body 5; 8 is a wheel provided on the front vehicle body 5; and 9 is a wheel provided on the rear vehicle body 6.

Note that the front and rear vehicle bodies 5 and 6 are detachably connected, and
When the two vehicle bodies 5 and 6 are combined, the structure is such that both the front and rear vehicles 8 and 9 can be driven.

10 is the front body 5 which is grounded when the rear body 6 is separated.
Reference numeral 11 indicates a lift handle for the auxiliary wheel 10, and 12 indicates a bonnet integrated with a fender provided on the front vehicle body 5.

Reference numeral 13 denotes hitch metal fittings fixed to the center of the front end of the front vehicle body 5 and the center of the rear end of the rear vehicle body 6, and are formed in a U-shape on the side.
Insertion holes 15 for king pins 14 are bored in the upper and lower stages, respectively.

Reference numeral 16 indicates a mounting portion for the lower link 17 provided at symmetrical positions on both the left and right sides of the hitch metal fitting 13, 18 indicates a link pin for removably pivoting one end of the lower link 17 to the mounting portion 16, and 19 indicates a The pin 18 is a retaining pin.

Reference numeral 20 designates a frame body of a lifting mechanism that forms a mounting portion 22 for the top link 21, and the mounting portion 20a provided at the lower end is removably attached to the hitch fitting 13 using two king pins 14 and push pins I and 23. It is being

24 is a pin that prevents the king pin 14 from being removed.

Incidentally, the top link 21 is removably pivoted to the mounting portion 22 via a link pin and a locking pin (not shown), as in the case of the lower link.

Reference numeral 25 denotes a hydraulic cylinder connected to the tip of a hydraulic hose 26 extending from a hydraulic pump mounted on the front vehicle body 5 via a control valve mechanism (both not shown), which is located near the driver's seat 7. Expansion and contraction are controlled by operating a control lever 27 provided.

Reference numeral 28 denotes a cylinder fixing shaft that passes through the lower end of the hydraulic cylinder 25 and the frame 20, and is locked with two pins to prevent removal.

Reference numeral 30 denotes screws 1 to 25 of the hydraulic cylinder 25, at the tip of which a lifting shaft 32 extending in the left-right direction is fixed via a bearing 31, and lifting rollers 33 are fixed to both ends of the lifting shaft 32, respectively. ing.

Reference numeral 34 denotes a guide shaft that is removably inserted horizontally into the upper end of the front portion of the frame body 20, and a pair of left and right guide rollers 35 are rotatably attached to the guide shaft.

Reference numeral 36 denotes a pin that prevents the guide shaft 34 from being removed.

Reference numeral 37 denotes an anchor shaft inserted into the rear upper end of the frame body 20, and one ends of a pair of left and right wire ropes 38 are fastened to this shaft 37.

The wire rope 38 detours from the anchor shaft 37 below the lifting roller 33 to the guide roller 35 , extends from the guide roller 35 toward the middle of the lower link 17 , and extends between its tip and the lower link 17 . A sliding metal fitting 40 is inserted into and locked with a link pin 39, and is connected to the sliding fitting 40 through a length adjusting screw 41.

Reference numeral 42 denotes a pin that prevents the link pin 39 from being removed. In the working machine elevating device for a mobile agricultural machine configured as described above, the mobile agricultural machine main body 1 is connected to the working machine (not shown) via a three-point link composed of a pair of left and right lower links 17 and a top link 21. Ru.

Further, since the lower link 17 is suspended and supported by the wire rope 38, the working machine can be raised and lowered relative to the mobile agricultural machine main body 1 by changing the lifting height by the wire rope 38.

That is, when the control lever 27 is operated to extend the hydraulic cylinder 25, the piston rod 30 is raised and the lifting roller 33 is raised.

Therefore, the amount of folding of the wire rope 38 between the anchor shaft 37 and the guide roller 35 is reduced, and the length of the wire rope 38 between the guide roller 35 and the sliding fitting 40 is increased, so that the lower link 17 swings downward, and the working machine can be lowered relative to the mobile agricultural machine main body 1.

Also, operate the control lever 27 to control the hydraulic cylinder 2.
5, the lifting roller 33 is lowered via the screw and rod 30.

Then, the amount of the wire rope 38 pulled in by the lifting roller 33 between the anchor shaft 37 and the guide roller 35 increases, and the wire rope 38 that lifts and supports the lower link 17 is pulled into the upper end of the frame 20. , the lower link 17 swings upward to raise the working machine relative to the mobile agricultural machine main body 1.

In the embodiment, the piston rod 30 and the wire rope 38 are connected to each other between the guide roller 35 and the anchor shaft 37 via the lifting roller 33 that moves up and down, so that the wire rope rope 30 is moved twice as much as the stroke of the hydraulic cylinder 25.
However, the tip of the wire rope 38 may be directly connected to the piston rod 30 so that the expansion and contraction stroke of the hydraulic cylinder 25 and the amount of movement of the wire rope 38 may be made the same.

Further, it is needless to mention in detail that by changing the position of the sliding metal fitting 40 attached to the lower link 17 by the link pin 39, the amount of rocking of the lower link 17 relative to the expansion/contraction stroke of the hydraulic cylinder 25 can be changed.

On the other hand, the frame 20 to which the hydraulic cylinder 25 and the like are attached is detachably attached to a hitch fitting 13 provided on the fuselage, and mounting portions 16 for the lower link 17 are provided on both sides of the hitch fitting 13. Therefore, the frame body 20 and the lower link 17 can be easily attached or detached to either the front or rear of the fuselage.

Therefore, when attaching the work equipment to the rear of the machine, it is sufficient to attach the frame 20 to the hitch metal fitting 13 at the rear and attach the lower nonk 17 to the mounting part 16 at the rear. When attaching the working machine, the pitch metal fitting 13 and the attachment part 16 on the front part may be used.

As explained above, according to the present invention, the frame body fitted with the hydraulic synonda that swings the lower link up and down via a wire rope and the lower link can be attached to any position in the front or rear of the fuselage, making it exceptionally The working machine can be attached to either the front or rear of the main body of the mobile agricultural machine without additionally installing a lifting device.

In addition, since the frame is attached to the hitch fittings provided at the center of the front and rear ends of the machine body, its connection structure and attachment/detachment operations are simple, and work equipment or trailers, etc. can be directly attached to the hitch fittings. You can also.

Furthermore, since the hydraulic cylinder and the lower link are linked via a wire rope, the structure is simplified and there are fewer failures, and it is easier to adjust the lifting height of the lower link and the swing stroke. can also be easily adjusted.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of a mobile agricultural machine equipped with a working machine lifting device according to the present invention, and FIG. 2 is a perspective view of the mobile agricultural machine shown in FIG. 1 viewed from another angle. 3 is a partially cutaway perspective view showing essential parts of the lifting device, FIG. 4 is a side view of FIG. 3, and FIG. 5 is a front view of FIG. 3. 1...Mobile agricultural machine, 13...Hitsuchi metal fittings, 16...Lower link mounting part, 17...
・Lower link, 20... Frame, 21...
・Top link, 22... Top link mounting part, 25... Hydraulic cylinder, 30... Screw I/rod, 33... Elevating roller, 35...
...Guide roller, 37...Anchor shaft,
38...Wire rope tube.

Claims (2)

[Scope of utility model registration request] (1) A hitch metal fitting formed in a substantially U-shape on the side is fixed to the center of the front and rear ends of the main body of the mobile agricultural machine, and a pair of left and right lower link mounting parts are provided on both sides sandwiching the pitch metal fitting, and the top link is attached. A frame body provided with a section is removably attached to the hit metal fitting, and a guide roller of a wire rope is attached to the middle section of the lower link and the tip of the piston rod of the hydraulic cylinder attached within the frame body. A work machine lifting device for a mobile agricultural machine, characterized in that it is pivoted to the upper end of a frame. (2) An elevating roller is pivotally attached to the tip of the piston rod, and the tip of the wire rope rope guided by the guide roller is fixed to the upper end of the frame, and the elevating roller is connected between the fixed end of the wire rope and the guide roller. A working machine lifting/lowering device for a mobile agricultural machine according to claim 1, which includes a working machine lifting/lowering device for a mobile agricultural machine as set forth in claim 1, which is engaged from above.