JPH0234081Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of Use This is a coupling device for a harvester that can be attached by adjusting the length by attaching and detaching a pin even if the length of the hit portion of the tractor differs.

Technical Background Tractors are the source of power for all types of agricultural work, so most households own one. On the other hand, harvesters are expensive and used infrequently, so they are purchased jointly by multiple households and used in an appropriate order. In most cases, vehicles are pulled by their own tractors.

The configuration of the tractors that pull the harvester varies depending on the manufacturer, including the size and size of the model, and even if the main components are equipped, there are inevitably some differences in the mounting position and dimensions. This is the current situation.

Prior Art At the connection point between the harvester and the tractor that pulls it, a connection device is constructed each time, so that if the main connection device does not match, the auxiliary connection member to be used will match. It is.

Problems to be solved by the invention In cases where direct connection is impossible due to size and mismatch in mounting position between the tractor and harvester, it is possible to connect the tractor and harvester by interposing an auxiliary connection member that can be expanded and contracted. The object of the present invention is to provide a coupling device that enables coupling of a tractor and a harvester whose members do not match.

Means for solving the problem: The horizontal frame of the harvester and the swing hitch part for attachment to the tractor are connected by a telescoping rod formed from inner and outer members whose lengths are adjustable, and a telescoping rod pin for fixing is attached to the inner and outer members. In addition to drilling multiple pin holes and one hole for insertion, horizontally drill the same number of pin holes of the same pitch as the pin holes drilled in the inner member in the left-right rotating body provided at the rear of the outer member, and insert the pin holes in the inner and outer members. Then, combine the telescopic rod pin and the rod pin to be inserted into the pin hole of the left and right swivel body, and attach the rod pivoted to the upper center of the swivel hit part to one of the pin holes of the left and right swivel body with the rod pin, and then insert the rod pin into one of the pin holes of the inner and outer members. Insert the telescopic rod pin into the
Even if the length of the hit part of the tractor is different, the length can be easily and easily adjusted by simply inserting and removing a pin, and the harvester can be attached to the tractor.

Embodiment Next, an embodiment of this invention will be described with reference to the drawings.
10 is a lower link which is a connected part equipped on the tractor B, and its length varies somewhat depending on the type of the tractor B. In addition, 11 is a drive shaft (PTO shaft), which also has a slight deviation in the mounting position left and right in the width direction of the tractor B due to the tractor B, and the drive shaft 11 is a universal shaft with a telescopic mechanism built into its tip. It can be connected to the propeller shaft 12 via a joint 14, and furthermore, the universal joint 1 is connected to the rear end of the propeller shaft 12.
A universal joint 14 similar to that of 4 is inserted so that it can be connected to the drive shaft 13 on the harvester A side.

The basic technical idea of the connecting device of this invention is to use the set length of the drive mechanism as a reference, and to adjust the connecting gap in accordance with the reference.

The horizontal frame 1 of the harvester A and the swing hitch part 2 for attachment to the tractor B are connected by a telescoping rod 5 formed from inner and outer members 3 and 4 whose lengths are adjustable, and a telescoping pin for fixing to the inner and outer members 3 and 4. A left-right rotating body 7 is provided at the rear of the external member 4, and a plurality of pin holes 3a, 4a for inserting the pin holes 3a and one pin hole are bored.
The same number of pin holes 7a of the same pitch P as the pin holes 3a of the inner member 3 are drilled horizontally in the same number as the pin holes of the inner member 3, and the pin holes 3a, 4a of the inner and outer members 3, 4 are
Then, the telescopic rod pin 6 and the rod pin 8 inserted into the pin hole 7a of the swing body 7 are combined, and the rear end of the rod 9, which is pivotally connected to the upper center of the swing hit part 2, is inserted into either the pin hole 7a of the left or right swing body 7 and the rod pin. 8, and the telescopic rod pin 6 is inserted into the pin holes 3a, 4a of either the inner or outer members 3, 4.

10 is a lower link provided on tractor B, 11 is a drive shaft (PTO shaft) taken out from the tractor, 12 is a propeller shaft, and 13 is a drive shaft of harvester A, which is the drive shaft 11 and propeller shaft 12 of tractor B. It is connected by .

Function Tractor B drive shaft (PTO shaft)
11 and the drive shaft 13 of harvester A, respectively, are interposed with a ready-made propeller shaft 12 with a length set in the middle via universal joints 14, 14 each having a telescoping mechanism. The connecting device of the present invention attempts to absorb the connection gap error caused by the length and shortness of the lower link 10 caused by the above mechanism, and the adjustment is absorbed by the telescopic rod 5.

When the tractor B and the harvester A are connected to pull the harvester A, the swing hitch part 2 is pivotally supported at its lower end to the rear end of the lower link 10 by a pin. On the other hand, in order to prevent twisting concentrated at the attachment part of the telescopic rod 5, rods 9 are stretched and reinforced, and since the rods 9 are compressed during the above action, 5. The rotation hitch 2 and the aforementioned rod 9 must form an immovable triangle. Therefore, when adjusting the length of the telescopic rod 5 during the connection operation, it is adjusted by the degree of fitting between the internal material 3 and the external material 4 that form the telescopic rod 5, and one unit of this movable distance corresponds to the length of the telescopic rod 5. This is the pitch between the plurality of pin holes 3a with which the rod pins 6 are engaged.

In this way, the direction of movement of the inner member 3 and outer member 4 in these telescoping rods 5 toward and away from each other is the longitudinal direction of the telescoping rod, and therefore, the left-right rotating body 7 attached to the outer member 4 is pivoted. The end of the rod 9 to be attached is pivoted at a pitch P which is the same distance as the pitch described above and is defined as one unit of the movable distance.

In this way, in the drive mechanism described above,
The interposed propeller shaft is of a pre-set length, and for dimensional errors due to unspecified connection positions required for other connections, the interposed length of the interposed propeller shaft is used as the calculation standard length, The adjustment distance is set to the pitch P as one unit, and there is inevitably a risk of excess or deficiency in the dimensions before or after the pitch P. Fine adjustment of these excess or deficiencies can be made by adjusting the longitudinal position of the propeller shaft. An appropriate coupling device can be obtained by utilizing the expansion and contraction function of the universal joint itself.

Tractor B drive shaft (PTO shaft)
11 and the drive shaft 13 of Herbsta A by the propeller shaft 12, if the distance is long, remove the telescopic rod pin 6 and the rod pin 8, and attach the rod 9 to the frontmost pin hole 7a-1 with the rod pin 8. Match the pin hole 3a-3 of the inner member 3 with the pin hole 4a of the outer member 4 and insert the telescopic rod pin 6 to attach it.If it is short, attach the rod 9 to the pin hole 7a-3 with the rod pin 8, pin hole 3a
-1 is aligned with the pin hole 4a and attached with the telescopic rod pin 6.

Effects of the invention In harvesters, etc., which are towed working machines that use ready-made length propeller shafts as connecting members, the connection intervals for each tractor are different, so each time the tractor towing the prepared towed working machine changes. Previously, the existing propeller shaft had to be cut or a new long propeller shaft had to be manufactured for each case, but according to the present invention, the length of the coupling device can be adjusted according to the required spacing between the coupling parts. By making it possible to easily change the length of the propeller shaft using this as a standard, it is possible to easily change the length of the propeller shaft for all tractors without having to adjust the length of the propeller shaft. This is an effective solution that can be dealt with simply by making adjustments.

[Brief explanation of the drawing]

1 is a side view of the harvester, FIG. 2 is a plan view of the coupling device, FIG. 3 is a front view thereof, and FIG. 4 is a side view thereof.

Claims (1)

[Scope of utility model registration request] The horizontal frame of the harvester and the swing hitch for attaching to the tractor are connected by a telescoping rod formed from inner and outer members whose lengths are adjustable, and the inner and outer members are provided with a plurality of pin holes and one pin hole into which a fixing telescoping rod pin is inserted. At the same time, the same number of pin holes of the same pitch as the pin holes drilled in the internal material are drilled in the horizontal direction on the left and right swivel body provided at the rear of the outer member, and the pin holes of the inner and outer members and the pin holes of the left and right swivel body are drilled horizontally. Combine the telescoping rod pin and rod pin to be inserted, attach the rod pivoted to the upper center of the swivel hit part to one of the pin holes in the left and right swivel body with the rod pin, and insert the telescoping rod pin into one of the pin holes in the inner and outer members. A coupling device in a harvester consisting of: