JPH0636643Y2 - Towing equipment for work equipment in tractors - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of a working machine towing device in a tractor provided at the rear of a body of a tractor for connecting and towing a working machine.

[Prior Art] A work machine towing device A for connecting and pulling a work machine to the rear of a tractor body is usually provided with a rear part on the rear surface of the tractor T body as shown in FIG. A box-like opening or a U-shaped connecting fitting 1 having a rear opening in a side view, and connecting pin insertion holes 10 and 10 penetrating vertically formed in parallel with each other in a pair, and the connection A tow hitch a consisting of a connecting pin 2 which is skewed up and down is provided in the pin insertion holes 10 and 10. At the front end of the machine body of the working machine S, there is provided a through hole 30 through which the connecting pin 2 passes. The tongue-shaped or ring-shaped connecting hitch b is provided, and the connecting hitch b is inserted into a space opened to the rear of the connecting fitting 1 in a state where the connecting pin 2 is extracted from the tow hitch a. To drop the connecting pin 2 from that state Ri, in the longitudinal direction of the intermediate portion of the connecting pin 2, connecting hole 30 is fitted in the connecting hitch b are constituted to have completed.

[Problems to be Solved by the Invention] For example, as shown in FIG. 1, this means is a traction hitch a in which the connecting hitch b at the front end is provided on the rear surface side of the body of the tractor T, as shown in FIG. The tractor T's towing unit is moved closer to the rear, and the tractor T's tow hitch a is placed on the ground surface GL.
Is inserted into the connecting hitch b of the working machine S, and the connecting pin 2 is dropped from that state to complete the connection of the working machine S to the tractor T, and conversely, with the connecting pin 2 pulled out, the tractor. By moving T forward, the tractor T
The work machine S is disconnected from the work machine S.

However, in both work of connecting and disconnecting the tow hitch a and the connecting hitch b, it is necessary to pull out and insert the connecting pin 2 as shown in FIGS. 2 and 3, and therefore, the tractor T one by one. The operator has to get off from there to insert and remove the connecting pin 2, which is a troublesome task.

This includes the top link on the rear side of the tractor T fuselage.
40 and the left and right lower links 41, 41 and a lift frame 42 and the like are provided with a support frame c that can be freely moved up and down by a three-point link hitch 4, and a tow hitch a is installed on the tow hitch a. As shown in FIG. 4, a locking rod 50 projecting upward is planted on the upper surface side, and the lift arm 42 is operated to elevate and lower the three-point link hitch 4, thereby towing the tow hitch. a is moved up and down, and its locking rod 50 is connected to the connecting hitch b at the front end of the working machine S.
It is only necessary to insert the connection hitch b to the tow hitch a so that the operator can sit and sit on the tractor T by inserting the through hole 30 from below from the through hole 30. Another problem comes to the point of becoming insecure.

That is, this is applicable to the case where the working machine S is simply moved in the field, but certainty is required for connection and connection for ensuring safety, such as when traveling on the road with the working machine S connected and connected. If so, problems arise that cannot be adapted.

The present invention has been made in order to solve these problems occurring in the conventional means, and is a simple connection and connection as in the case of moving a working machine in a field to replace the working machine. If it is good, the operator can connect and disconnect the tractor's tow hitch and the work implement's connecting hitch while sitting on the tactor, but a reliable connection is required to ensure safety. It is an object to provide a means that can cope with cases.

[Means for Solving the Problem] In the present invention, as means for achieving this object, a supporting machine frame is mounted on the rear surface side of the body of the tractor via a three-point link hitch, In addition, a box-shaped connecting bracket that opens to the rear or a U-shape in side view, and a pair of connecting pin insertion holes that are formed vertically through the connecting bracket so that the pins can be inserted and removed freely A tow hitch consisting of mating connecting pins is installed, and in the front part of the working machine, a tongue-shaped member is inserted into the upper and lower parts of the connecting metal fittings in the upper and lower spaces of the pair of connecting pin insertion holes so that the tongue piece can be inserted and removed freely.
In a towing device for a working machine of a tractor, which is provided with a connecting hitch having a through hole through which the pin portion of the connecting pin is inserted, the connecting pin of the towing hitch has a pin portion of the connecting pin of the connecting fitting. An outer diameter for inserting a locking rod standing upright from the upper surface of the abutting portion that abuts the upper surface of the connecting metal fitting into the through hole of the connecting hitch installed at the front end of the working machine in a state of being inserted into the through hole. The present invention provides a tractor for a working machine in a tractor formed integrally with the connecting pin so as to be continuous with the connecting pin.

Example Next, an example will be described in detail with reference to the drawings. In addition, the drawing symbols are
The same reference numerals are used for components having the same effect as those of the conventional means.

FIG. 5 is a schematic side view of an entire working machine towing apparatus for a tractor embodying the present invention. In FIG. 5, T is a tractor, 4 is a three-point link hitch mounted on the rear surface side of the tractor T, c Is a supporting machine frame, a is a tow hitch mounted on the supporting machine frame c, S is a working machine, and b is a connecting hitch mounted at the front end of the working machine S.

The three-point link hitch 4 includes a top link 40 mounted on the rear surface side of the tractor T body and left and right lower links 41, 41.
And a conventionally known one consisting of a lift arm 42,
By lifting and lowering the lift arm 42 by controlling the operation of a hydraulic device mounted on the body of the tractor T, the lift arm 42 is moved up and down.

The supporter frame c is a frame body formed to have an arched shape in a front view, and the rear end of the top link 40 is pivotally connected to the upper end that is the left and right intermediate part to form the left and right outer ends. The rear ends of the left and right lower links 41, 41 are pivotally connected to the lower end. A shaft end portion 60 on the output side of the universal joint unit U connected to a PTO shaft mounted on the rear surface of the body of the tractor T is mounted on the middle portion between the upper and lower sides.

The tow hitch a provided on the supporter frame c is formed in a box shape with the rear opening or in a U shape in a side view, and the connecting fitting 1 is provided with connecting pin insertion holes 10.
The configuration of the connecting pin 2 which is formed in the connecting pin insertion hole 10 and 10 and which is inserted from above to be skewered is similar to that of the traction hitch a of the conventional means. When the pin portion 2a thereof is inserted into the connecting pin insertion hole 10 formed in the connecting metal fitting 1 by dropping it from above, the abutment is made on the upper surface of the connecting metal fitting 1 and the pin portion 2a is inserted. As shown in FIG. 4, the upright locking rod 50 for fitting into the through hole 30 of the connecting hitch b of the working machine S is provided above the abutting portion 2b for holding the work piece S in the locked state. To
The connecting pin 2 is formed integrally and continuously.

As a result, when the pin portion 2a of the continuous pin 2 is dropped into the connecting pin insertion hole 10 of the connecting fitting 1 and is inserted, as shown in FIG. 7, a locking rod that stands upright on the upper surface of the connecting fitting 1. 50 exists, and if the locking rod 50 is grasped and the connecting pin 2 is pulled out from the connecting metal fitting 1, the connecting hitch b of the working machine S is fitted into the inner cavity of the connecting metal fitting 1. 1 to 3 by inserting the pin portion 2a of the connecting pin 2 into the connecting pin insertion holes 10 and 10 of the connecting fitting 1 and the through hole 30 of the connecting hitch b in such a state that the connecting pin 2 is inserted. The connection and connection between the normal tow hitch a and the connection hitch b in FIG.

In the illustrated embodiment, the connecting pin 2 has the same shape and length as the locking rod 50 and the pin 2a which are formed so as to stand upright on the upper surface of the abutting portion 2b formed in the shape of a collar. The pin insertion holes 2c for inserting the knock pin or the split pin are formed at the protruding ends of the pin portion 2a and the locking rod 50, respectively. And connection fitting 1
In order to prevent erroneous operation by allowing it to be inserted into the connecting pin insertion holes 10 and 10, only the pin insertion hole 2c at the lower end on the side where the pin portion 2a is inserted into the connection pin insertion hole 10 It is used to insert a knock pin or a split pin. Further, 7 is a foldable support leg.

The embodiment apparatus configured as described above operates as follows.

The tow hitch a of the tractor T is connected to the connecting hitch b of the work implement S.
When connecting and connecting so as not to come off, the connecting pin 2 is pulled out and the state shown in FIG. 6 is set. From this state, the body of the tractor T is moved backward and the connecting metal fitting 1 of the tow hitch a is removed. The connection hitch b of the working machine S is fitted into the inner cavity, and then the pin portion 2a of the connection pin 2 that has been extracted
Through the connecting pin insertion holes 10 and 10 of the connecting fitting 1 and the through hole 30 of the connecting hitch b to form a pin hole at the lower end of the pin portion 2a.
Insert a knock pin or a linch pin into 2c.

As a result, the tow hitch a and the connecting hitch b are connected and connected so that they cannot escape.

Next, when simple connection / connection is allowed, such as when the work implement S is moved in the field, the pin portion of the connection pin 2 is used.
2a is dropped into the connecting pin insertion hole 10 of the connecting fitting 1, and a knock pin or a linch pin is inserted into the pin insertion hole 2c on the lower end side of the pin portion 2a.

In this state, the driving operation of the tractor T
Move the three-point link hitch 4 downward to pull the tow hitch a.
Is positioned lower than the connecting hitch b of the working machine S placed on the ground, and the tractor T is moved backward in this state, so that the towing hitch a of the connecting hitch b of the working machine S is moved as shown in FIG. The lock rod 50 is positioned downward, and then the three-point link hitch 4 is lifted to insert the locking rod 50 into the through hole 30 of the connecting hitch b.

When the engagement between the locking rod 50 and the through hole 30 is completed, the tractor T is moved forward to travel to a desired place, and the working machine S is pulled to that place.

Next, when the three-point link hitch 4 is lowered at the desired position, the locking rod 50 is released from the through hole 30 of the connection hitch b, and the connection is released. Therefore, the operator can attach / detach the tow hitch a and the connecting hitch b of the working machine S while sitting on the body of the tractor T.

[Effects of the Invention] As described above, the traction device for a working machine in the tractor according to the present invention mounts the supporting machine frame c on the rear surface side of the tractor T via the three-point link hitch, and ,
A box-like or U-shaped connecting fitting 1 that opens rearward, and a pair of upper and lower connecting pin insertion holes 10 and 10 formed in the connecting fitting 1 so as to vertically penetrate therethrough.
Is equipped with a tow hitch a composed of a connecting pin 2 into which the work piece S can be inserted and removed freely.
A pair of connecting pin insertion holes 10 and 10 above and below the tongue, which are inserted into the upper and lower spaces of the connecting pin so as to be freely inserted and removed.
Connecting hitch b having a through hole 30 through which the pin portion 2a of
In the tractor of the working machine of the tractor, the connecting pin 2 of the towing hitch a is inserted into the connecting pin insertion holes 10 of the connecting metal fitting 1 in the state described above. A locking rod 50 that stands upright from the upper surface of the abutting portion 2b that abuts the upper surface of the connecting fitting 1 is formed to have an outer diameter that fits into the through hole 30 of the connecting hitch b installed at the front end of the working machine S. Since it is configured to be integrally provided with the connecting pin 2, it is possible to replace the working machine by replacing the working machine in the field with simple connection / connection.
The operator can connect and disconnect the tractor's tow hitch and the work implement's connecting hitch while sitting on the tractor, while also supporting the case where a reliable connection is required to ensure safety. I will get it.

[Brief description of drawings]

FIG. 1 is a schematic side view of an entire towing device for a working machine in a conventional tractor, FIGS. 2 and 3 are explanatory views of the operation of the main parts of the same, FIG. 4 is an explanatory view of a prior art, and FIG. FIG. 6 is a side view showing an outline of the entire towing device for a working machine in a tractor according to the present invention, FIG. 6 is a side view in which a connecting pin of a main portion of the same is pulled out, and FIG. FIG. 7 is a side view in which a connecting pin is inserted and partially broken. Explanation of symbols A ... Working machine traction device S ... Working machine, T ... Tractor U ... Universal joint unit 1 ... Connecting metal fitting, 10 ... Connecting pin insertion hole, 2 ... Connecting pin 2a ... Pin portion, 2b ... Abutting portion, 2c … Pin insertion hole 30… Through hole, 4… Three-point link hitch, 40… Top link 41… Lower link, 42… Lift arm, 50… Locking rod 60… Shaft end, 7… Support legs, GL… Ground surface

Claims (1)

[Scope of utility model registration request] 1. A support machine frame c is mounted on a rear surface side of a body of a tractor T via a three-point link hitch, and is connected to the box shape or a U-shape in a side view opened rearward. A tow hitch a consisting of a metal fitting 1 and a connecting pin 2 into which a pin portion 2a is removably fitted into a pair of upper and lower connecting pin insertion holes 10 formed so as to vertically penetrate the connecting metal fitting 1.
Is installed in the front part of the working machine S, in the form of a tongue piece that is inserted into and removed from the upper and lower portions of the connecting fitting 1 within the upper and lower intervals of the pair of connecting pin insertion holes 10 and 10. In a towing device for a working machine of a tractor, which is provided with a connecting hitch b having a through hole 30 through which the second pin portion 2a is inserted, the connecting pin 2 of the towing hitch a is connected to the pin portion 2a thereof. At the front end of the working machine S, a locking rod 50 that stands upright from the upper surface of the abutting portion 2b that abuts the upper surface of the connecting metal fitting 1 in a state of being inserted into the connecting pin insertion holes 10 of the metal fitting 1. A towing device for a working machine in a tractor, which is formed to have an outer diameter to be inserted into the through hole 30 of the connecting hitch b and is provided continuously with the connecting pin 2 integrally.