JPH0444004Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[Industrial Application Field] This proposal relates to a large root vegetable digger that is towed by a tractor. [Prior Art] A root vegetable excavator towed by a tractor is equipped with an excavator for cutting the bottom of a ridge, a sieve conveyor for separating attached soil, and, if necessary, a storage box. For example, Utility Model Publication No. 44-19548 relates to a beet harvester, which uses a tractor to pull a truck frame to dig, pull up, transport, and store beets. In this prior application, the excavation part is raised and lowered independently with respect to the truck frame, and the depth of cut is adjusted by a rope connected to the tractor. Furthermore, the conventionally known Utility Model Application Publication No. 58-188340 is a dumping device for the loading platform of a transport vehicle, which utilizes the lifting device of a tractor as the dumping lifting force.

[Problem that the invention attempts to solve]

In the above-mentioned Utility Model Publication No. 44-19545, the cutting depth of the excavating blade is determined by a rope, and each adjustment is required when the tractor is changed, which is complicated. Also,
The latter reference, Utility Model Application Publication No. 188340/1983, has problems such as the difficulty of turning in a small turn when turning left and right, and the difficulty in transmitting power at the same time as turning in a small turn.

[Means to solve the problem]

In order to solve the above problems, an excavator that is connected to the rear of the tractor and has at least an excavator blade and a sieve conveyor is equipped with a hitch in which a connecting bar is suspended horizontally at the ends of a pair of lower links and a traction rod is protruded from the rear. Equipped with a frame body, the excavator is towed by a universal joint, and a stopper is provided on the side of the connecting bar, with which the lower edge of the lower link appropriately contacts, so that when the lower link is raised, the traction rod is also integrated. The excavating part of the excavator is also configured to be able to be raised and lowered, and a bearing part having front and rear relay shafts is provided on the traction rod, so that the tractor PTO shaft, the front part of the relay shaft, and the A universal joint is installed at the rear of the relay shaft and the input shaft on the excavation machine body side, and the bending point of the universal joint is arranged approximately in the center between the relay bearing part and the input shaft of the excavation machine body. The present invention provides an excavator that is connected to a tractor and is characterized by: [Function] When the hitch frame according to the present invention is connected to the lower link of the three-point link and introduced into the field, when moving or turning the headland, the excavation part will rise and be pulled out of the ridge by simply raising the hydraulic arm. When lowered, it will dig properly under its own weight. The depth of cut remains constant as the left and right coulter gauge wheels receive the digging reaction force. In addition, the power is transmitted via the relay bearing part,
When turning, the bending point of the universal joint is approximately at the center of the universal joint, so it is at the same angle and does not impair power transmission. [Example] The configuration will be explained based on the drawings that were implemented. A shows the rear part of the tractor, which tows an excavator consisting of a storage section c and an excavation section b by means of a hitch frame d. 1 is the lower link and hydraulic arm 4 at the rear of the tractor.
, and the hitch frame d is attached by the lower pin 6. The hitch frame d consists of a connecting bar 2 and a traction rod 3, and stoppers 17 are provided on both sides of the connecting bar 2, and are brought into contact with the lower edge of the lower link 1 below the lower pin 6. The tip of the traction rod 3 is connected to a pipe frame 9 via a universal joint 7. 5 is a bearing provided on the traction rod 3. The excavating part b is formed by supporting an excavating body 15 at the front lower part of the base frame 8 by a vertical rod 14, and disposing a beater wheel 16 inclined toward the rear of the excavating body 15. The beater wheel 16 is formed of a star-shaped rubber material, and the protrusions of the front and rear beater wheels 16 are overlapped with each other. An interlocking rod 19 connected to an eccentric cam is connected to the vertical rod 14, and vibrates the excavating body 15. Reference numeral 11 denotes a transmission box which transmits power from the tractor and is intermediately supported by a bearing part 5 before being transmitted. It is fixed to and formed integrally with the base frame 8. The bearing part 5 placed on the upper part of the traction rod 3 of the hitch frame d has relay shafts at the front and rear, and is connected to the PTO shaft 24 of the tractor and the universal joint 2 shown in FIG.
Connected via 3. The relay shaft at the rear of the bearing part 5 is connected to the input shaft 25 of the excavated part b and the universal joint 23'. A universal joint 7 is arranged approximately in the center between the bearing portion 5 and the input shaft 25. An elevator conveyor 18 is supported by the base frame 8 and faces the rear end of the beater wheel 16. Reference numeral 21 denotes a harvesting table on which storage bags and the like are mounted, and the opening of the storage bags is preferably located at the back of the top of the elevator conveyor 18. The harvesting table 21 is linked with the lift device 20, and at the beginning of the harvesting operation, the harvesting table is raised to a minimum height, and the distance over which the harvested material is released and falls is set to the minimum, and is lowered according to the amount of harvest. Reference numeral 22 is a coal gauge wheel which cuts the weed stems and leaves and makes the cutting depth constant. [Effects] With the above configuration, large excavators towed by a tractor can be easily operated by simply operating the tractor hydraulic arm without the need for a special elevating device for the excavator, and at the same time This provides a traction device that can be used for both traction and elevating the excavation part, while maintaining the conventional traction work that can be followed horizontally and vertically.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the present invention, Fig. 2 is a side view, and Fig. 3 is a side view when the hitch frame is lifted up. a is the rear part of the tractor, b is the excavation part, c is the storage part,
d is a hitch frame body, 1 is a lower link, 2 is a connecting bar, 3 is a traction rod, 4 is a hydraulic arm, 5 is a bearing part,
6 is a lower pin, 7 is a universal joint, 8 is a base frame, 9 is a pipe frame, 10 is a side plate, 11 is a transmission box,
12 is a horizontal shaft, 13 is a support shaft, 14 is a vertical rod, 15 is an excavation body, 16 is a beater wheel, 17 is a stopper,
18 is an elevator conveyor, 19 is an interlocking rod, 20
is a lift device, 21 is a harvesting table, 22 is a coulter gauge wheel, 23 and 23' are universal joints, 24 is a PTO shaft, and 25 is an input shaft.

Claims (1)

[Scope of utility model registration request] An excavator that is connected to the rear of a tractor and has at least an excavator blade and a sieve conveyor is equipped with a hitch frame body in which a connecting bar is suspended horizontally at the ends of a pair of lower links and a traction rod is protruded from the rear. In addition to towing the excavator by means of a universal joint, a stopper is provided on the side of the connecting bar to which the lower edge of the lower link appropriately abuts, and when the lower link is raised, the traction rod also rises together with the excavator. The tractor PTO shaft and the front part of the relay shaft are provided with bearings having relay shafts on the front and rear sides of the traction rod.
A universal joint is attached to the rear part of the front relay shaft and the input shaft of the excavation machine body, respectively, and the bending point of the universal joint is arranged approximately in the center between the relay bearing part and the input shaft of the excavation machine body. An excavator connected to a tractor.