JPH0322121B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a work equipment coupling device that detachably connects a power vehicle such as a tractor and a working machine such as a mower.

(Prior Art) This type of work machine coupling device is known, for example, as described in the specification and drawings of Japanese Utility Model Application No. 58-170604. In this conventional type, the rear end of the support frame attached to the mower is rotatably connected to the front end of the traveling vehicle body via a pivot shaft.

(Problems to be Solved by the Invention) In the above-mentioned conventional device, in order to attach the mower to the traveling vehicle body, the driver must get off the vehicle, and about two people must push the mower and attach it to the mounting part. However, the installation work was difficult.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a work implement coupling device that allows a driver to easily and reliably connect a work implement while riding on a traveling vehicle.

(Means for Solving the Problems) The present invention is characterized in that a pair of left and right connecting portions are provided at the front end or rear end of a power vehicle, and the connection portions are connected to a working machine mounted on the power vehicle. A connected part is provided which is detachably connected to the part, and one of the connected part and the connected part is formed into a cylindrical body,
The other is formed into a male body that is removably inserted into the cylindrical body, and the left and right end surfaces of either the connecting part and the connected part are located on the same plane in the left-right direction, The other left and right end surfaces are located in a staggered manner.

(Function) According to the present invention, in order to connect a power vehicle and a working machine, first, the connecting portion and the connected portion are arranged so as to face each other in the traveling direction of the power vehicle. Next, the power vehicle is moved in its traveling direction to bring the connecting portion and the connected portion into contact with each other. At this time, since the connecting part and the connected part consist of a cylindrical body and a male body that is removably inserted into the cylindrical body, the two are automatically connected.

Furthermore, when making the above contact, the left and right connecting parts and the connected part do not come into contact at the same time, but either the left or right one comes into contact first and is coupled. Therefore, since the driver only has to drive with the target being the side that will be coupled first, the operation for coupling becomes easy. After one side is connected, by further moving the power vehicle forward, even if the working machine is arranged in a somewhat twisted position, the working machine can be corrected to the correct position by fitting the cylinder body and the male body. The other connecting part and the connected part are automatically connected.

(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

In FIGS. 1 to 3, 1 is a tractor shown as an example of a power vehicle, and the tractor 1 has a driving deck 2, a control handle 3, a driver's seat 4 at the front,
It has an engine 5 at the rear. Power from the engine 5 is transmitted from the transmission case 6 to the rear wheels 8 via a power transmission shaft 7. A steering operation of the steering wheel 3 is transmitted to the rear wheels 8 via a steering mechanism. The front wheels 9 are rotatably supported by a pair of left and right front axle cases 10 fixed to the front sides of the transmission case 6. A PTO shaft 11 for front power extraction protrudes from the front end surface of the transmission case 6.

Brackets 12 are provided protruding from the front surfaces of the pair of left and right front axle cases 10, respectively, and a connecting portion 14 is pivotally attached to the brackets 12 via pins 12a so as to be freely rotatable in the vertical direction. The connecting portion 13 is formed into a cylindrical body having a rectangular cross section, and as shown in FIG. 4, an opening 14 at the front end thereof widens into a trumpet shape.

As shown in FIG. 1, the front end surfaces of the pair of left and right connecting portions 13 are at a distance L from the same plane in the left and right direction.
It stands out like a discrepancy. A lift cylinder 15 is pivotally mounted in the middle of these various connecting parts 13,
The rear end of the cylinder 15 is pivotally supported by the front axle case 10. This expansion and contraction movement of the lift cylinder 15 causes the connecting portion 13 to move up and down.

16 is a mower shown as an example of a working machine,
The mower 16 has a mower deck 18 for supporting three sets of cutters 17 that rotate about vertical axes. This mower deck 18 is attached to a gate-shaped support frame 21 having gauge wheels 19, 20 at its front and rear ends.

A power receiving gear box 22 is attached to the upper surface of the mower deck 18 for driving the cutter 17 via a belt transmission mechanism or the like. An input shaft 23 protrudes from this gearbox 22, and this input shaft 23 is detachably connected to the PTO shaft 11 via a freely connecting shaft 24.

A pair of right and left brackets 25 are protruded from the upper surface of the mower deck 18, and the front end of a connected portion 27 is pivotally connected to the brackets 25 via a pin 26 so as to be freely rotatable in the vertical direction. This connected portion 27
is formed into a male body that is removably inserted into the cylindrical body of the connecting portion 13. A sphere 28 is formed at the rear end of the connected portion 27, and the opening 1 of the connecting portion 13
It is easy to insert from 4. This connected part 2
The rear end surfaces of No. 7 are located on the same plane in the left-right direction.

As shown in FIG. 4, the connecting portion 13 is provided with a locking device 29, and the locking device 29 includes a cylindrical body 30 fixed to the side surface of the connecting portion 13, and a cylindrical body 30 fixed to the side surface of the connecting portion 13.
It consists of a lock pin 31 that is slidably inserted into the connector, and a spring 32 that biases the pin 31 toward the connecting portion. The tip of the lock pin 31 passes through the connecting portion 13. An end portion of the lock pin 31 on the side of the cylinder 30 is bent to form a locking portion 33, and a stopper piece 34 for engaging the locking portion 33 is provided protruding from the cylinder 30. By pulling the lock pin 31 against the spring 32 and engaging the locking part 33 and the stopper piece 34, the connecting part 13 is connected to the connected part 2.
7 can be inserted. A plurality of through holes 35 into which lock pins 31 are removably inserted are formed in the connected portion 27. Locking part 33 and stopper piece 34
By releasing the engagement with the lock pin 31 and advancing the lock pin 31 and inserting it into the through hole 35 of the connected part 27,
The connecting portion 13 and the connected portion 27 are irremovably connected.

As shown in FIGS. 2 and 3, windows 3 are provided on the left and right sides of the driving deck 2 of the tractor 1 so that the connected state of the connecting portion 13 and the connected portion 27 can be visually observed.
6 have been established. These windows 36 are covered with transparent plates. A window 37 is also provided in the center of the driving deck 2, and the flexible connecting shaft 24 can be installed and removed through the window 37 while sitting in the driver's seat 4. This window 37 is covered with a lid that can be opened and closed.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and the lower link of the three-point link mechanism may be used as the connecting portion. The working machine may be a snow blower or the like in addition to a mower. Further, the connected portion may be a cylindrical body, and furthermore, the difference in protrusion amount may be on the connected portion side.

(Effect of the invention) According to the invention, the connection between the power vehicle and the working machine is
This can be done while riding in a vehicle, which saves labor compared to conventional methods that require two people. Also, since the amount of protrusion on the left and right sides is different, installation work becomes easier.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of the present invention before connection, FIG. 2 is a plan view after connection, FIG. 3 is a side view of the same, and FIG. 4 is a sectional view of the connected state. DESCRIPTION OF SYMBOLS 1... Power vehicle, 13... Connecting part, 16... Working machine, 27... Connected part.

Claims (1)

[Claims] 1. A pair of left and right connecting portions are provided at the front end or rear end of a power vehicle, and a connected portion is provided on a working machine mounted on the power vehicle to be detachably connected to the connecting portion, and the connecting portion and the connected part, one of which is molded into a cylindrical body, and the other is molded into a male body that is removably inserted into the cylindrical body, and one of the connected part and the connected part A working machine coupling device characterized in that one left and right tip surfaces are located on the same plane in the left-right direction, and the other left and right tip surfaces are located in a staggered manner.