JP3661215B2 - Tractor quick coupler - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a tractor quick coupler, and more particularly to a protective cover for a quick coupler.
[0002]
[Prior art]
Work implements such as rotary are detachably connected to the rear part of the tractor via a connecting device such as a three-point link or a two-point link. Recently, however, a quick hitch that connects the tractor and the work implement with one touch has been widely used. It is being done.
[0003]
There is also known a quick coupler that automatically attaches a coupler on the work machine side to a coupler on the machine body side when a coupler for connecting an electric cable is attached to the quick hitch and the work machine is coupled. When the work machine is separated from the tractor, a protective cover is attached to the coupler, and the protective cover protects the coupler when not in use from muddy water and pebbles.
[0004]
Also, when connecting the work implement to the tractor, the protective cover is removed in order to connect the couplers of both the tractor and the work implement, but in order to avoid losing the protective cover, close the coupler to a position near the coupler. Secure the protective cover.
[0005]
[Problems to be solved by the invention]
Conventionally, when a work implement is connected to a tractor equipped with a quick coupler, the protective cover is secured in the vicinity of the coupler, but the coupler contact surface of the protective cover is soiled by scattering of pebbles, muddy water, etc. There is. In that case, when the work machine is separated from the tractor and the protective cover is attached to the coupler, dirt on the coupler contact surface of the protective cover adheres to the coupler and the next time the couplers are joined again, the contact is poor. There is a risk of causing.
[0006]
Therefore, regardless of whether the quick coupler is used or not, there are technical problems that need to be solved in order to prevent dirt and dirt from adhering to the coupler and to protect the coupler reliably. The present invention aims to solve this problem.
[0007]
[Means for Solving the Problems]
The present invention has been proposed to achieve the above object, and a quick hitch for connecting a work implement is provided at the rear of the tractor, and a controller on the tractor side, a sensor and a motor on the work implement side are provided on the quick hitch. quick coupler der fitted with couplers for electrical cabling to connect is, the Quick coupler, one side of and Deposit cover larger than the outer dimensions of the Deposit cover the Deposit cover surrounding the side surface portion of the coupler openably and a protective cover that is hinged on to a quick coupler which formed was to expose or the蔽the coupler to open and close the protective cover, the upper the upper center position of the hitch frame of portal A hook is fixed and lower hooks are provided at the lower left and right edges of the hitch frame, and a base is attached to one lower end of the hitch frame. Attach the electrical cable connection coupler, safety cover and protective cover to the base, and when the quick coupler is connected, the tractor quick switch is turned on. In the coupler ,
The protective cover is provided with a seal portion that is in contact with and away from the outer edge of the safety cover, and a plurality of monitor lamps that notify the tractor-side electric cable that the quick coupler is connected. A display device for turning on the monitor lamp is connected via the controller. On the other hand, the electrical cable of the work machine side quick coupler is provided with a plurality of sockets including a socket for taking out an external power supply, The power supply to the socket is operated by turning on and off a changeover switch provided in the controller, and the tractor is configured to notify the lighting of the monitor lamp of the display device in response to the power supply to the socket. The quick coupler is provided.
[0008]
[Action]
The coupler is covered and protected with a protective cover that is covered with a protective cover having a sealing portion that is in contact with and separated from the outer edge of the safety cover on the inner side of the cover to protect against adhesion of foreign matter. , Dirt mud adhering to the protective cover will not contaminate the quick coupler. When the work machine is connected to the tractor, the protective cover is opened to expose the coupler, the quick hitch is connected, and the coupler of the tractor and the work machine are connected. If so, the monitor lamp of the display device on the tractor side is lit to notify that the quick coupler is being connected.
[0009]
Since the electrical cable of the work machine side quick coupler is provided with a plurality of sockets including a socket for taking out an external power supply, it is possible to connect power supplies of various additional equipment of the work machine.
[0010]
【Example】
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a quick hitch 11 for connecting a work implement provided at the rear part of a tractor. An upper hook 13 is fixed at an upper center position of a gate-shaped hitch frame 12 and lower parts at left and right lower edges of the hitch frame 12. Hooks 14 and 15 are attached. In addition, an output portion 16 of a PTO connector is supported at the lower center of the hitch frame 12, and PTO power is output via a universal joint 17 from a PTO shaft (not shown).
[0011]
Here, a base 18 is fixed to one lower end portion of the hitch frame 12, and a coupler 19 for connecting an electric cable is attached to the base 18. As will be described later, a coupler is also provided at the position facing the coupler 19 on the work machine side, and a quick coupler is constituted by both couplers. Then, the upper hook 13 is engaged with the upper pin provided on the work machine side to lift the work machine, and the lower pin on the work machine side is engaged with the lower hooks 14 and 15 while pulling the work machine to the machine body, Connect the quick hitch 11.
[0012]
At this time, the output unit 16 of the PTO connector and the input unit on the work machine side are fitted, and the coupler of the work machine is fitted to the coupler 19 on the machine body side, and along with the connection of the quick hitch 11, Both the power system and the electric system are automatically connected.
[0013]
As shown in FIGS. 1 and 2, a safety cover 20 surrounding the side surface of the coupler 19 is fixed to the base 18 to protect the coupler 19 from scattering of pebbles, muddy water, etc., or from contact with other objects. A bracket 21 is provided on one side of the safety cover 20, and a stay 23 of a protective cover 22 is pivotally attached to the bracket 21 with a pin 24. The protective cover 22 can be opened and closed with respect to the safety cover 20. To wear.
[0014]
The protective cover 22 is formed to be larger than the outer dimensions of the safety cover 20, and a sealing portion 25 is provided around the inner side of the protective cover 22 so that the outer edge of the safety cover 20 is closed when the protective cover 22 is closed. The seal portion 25 comes into contact with the portion to scatter the coupler 19 from scattering of pebbles, muddy water, and the like, and protect the coupler 19 from adhering to foreign matter such as muddy water and dust when not in use.
[0015]
Thus, when connecting the work machine to the tractor, as shown in FIGS. 1 and 2A, the protective cover 22 is opened to expose the coupler 19, and both the couplers are connected together with the quick hitch 11. Connected so that electrical signals can be transmitted between the tractor and the work implement.
[0016]
Here, when the work is performed with the protective cover 22 opened, pebbles, muddy water, and the like may be scattered on the protective cover 22 and the inside of the protective cover 22 and the seal portion 25 may be soiled. Thereafter, when the work is finished and the work implement is separated from the tractor, the protective cover 22 is closed and the coupler 19 is covered. When the protective cover 22 is covered on the coupler 19, As shown in FIG. 2B, the seal portion 25 of the protective cover 22 contacts the outer edge of the safety cover 20, so that the inside of the protective cover 22 contaminated with pebbles or muddy water directly contacts the coupler 19. Therefore, it is possible to prevent foreign matter such as soil mud from adhering to the coupler 19.
[0017]
A torsion coil spring 26 is interposed on the pin 24 connecting the bracket 21 and the stay 23 to bias the protective cover 22 in the closing direction so that the coupler 19 is not exposed when not in use. It is.
[0018]
FIG. 3 shows another embodiment. FIG. 3A shows a coupler 27 on the work machine side, and FIG. 3B shows a coupler 19 on the tractor side. The side surfaces of the respective couplers 27 and 19 are surrounded by safety covers 28 and 20 to protect the couplers 27 and 19 from scattering of pebbles, muddy water, etc., or contact with other objects. Brackets 29 and 30 are provided on one side of each safety cover 28 and 20, and a stay 32 of a protective cover 31 is pivotally attached to one bracket 29 by a pin 33 and a protective cover 34 is attached to the other bracket 30. The stay 35 is pivotally attached to the pin 36.
[0019]
The protective cover 31 is fitted in the front concave portion of the coupler 27 on the work machine side so as to cover the connection portion of the coupler 27 so as not to be exposed. On the other hand, the protective cover 34 is fitted on the front convex portion of the coupler 19 on the tractor side so as to cover the connecting portion of the coupler 19 so as not to be exposed. Therefore, by fitting these protective covers 31 and 34, it is possible to protect foreign materials such as muddy water and dust from entering the couplers 27 and 19 when not in use.
[0020]
Thus, when connecting the work machine to the tractor, as shown by the arrows in FIGS. 3 (a) and 3 (b), the stays 32 and 35 are rotated with the pins 33 and 36 as rotation fulcrums. As indicated by the chain line, the respective protective covers 31 and 34 are opened to expose the connecting portions of the couplers 27 and 19, and the couplers 27 and 19 are coupled together with the quick hitch connection. Thus, as shown in FIG. 4, both the couplers 27 and 19 are connected so that an electric signal can be transmitted between the tractor and the work implement. At this time, the protective cover 31 on the work implement side is provided. Is inserted into the protective cover 34 on the tractor side, and the protective covers 31 and 34 are joined.
[0021]
For this reason, the coupler contact surfaces of both protective covers 31 and 34 are covered, and it is possible to prevent the respective coupler contact surfaces of the protective covers 31 and 34 from being soiled by scattering of pebbles or muddy water. Accordingly, when the work implement is separated from the tractor and the respective couplers 27 and 19 are closed again by the protective covers 31 and 34, the possibility that foreign matters such as soil mud adhere to the couplers 27 and 19 is eliminated.
[0022]
FIG. 5 shows still another embodiment, in which a protective cover 37 that is covered when the coupler 19 on the tractor side is not used is provided, and the protective cover 37 is covered together with a protective cap 38 that covers the coupler contact surface of the protective cover 37. Is coupled to a position near the coupler 19 with a band 39 such as urethane or wire. In addition, a cap holder 40 is provided on the base 18 so that only the protective cap 38 or the protective cover 37 can be fixed via the protective cap 38 as will be described later.
[0023]
As shown in FIG. 6, a tapered coupler contact surface 37a is recessed inside the protective cover 37. When the coupler 19 is not in use, the coupler contact surface 37a is brought into contact with the front surface of the coupler 19 for protection. Cover 37 is attached. Further, a tapered plug 38a that is fitted into the coupler contact surface 37a of the protective cover 37 is provided on one side of the protective cap 38, and a circular recess 38b is formed at the center of the plug 38a. Yes. On the other hand, a cylindrical socket 38 c is provided on the other side of the protective cap 38.
[0024]
Further, a tapered storage portion 40a is recessed inside the cap holder 40 so that a plug 38a provided on one side of the protective cap 38 can be fitted, and a circular shape is formed in the center of the storage portion 40a. A boss 40b is provided so that a socket 38c provided on the other side of the protective cap 38 can be fitted.
[0025]
Thus, when the working machine is connected to the tractor, the plug 38a of the protective cap 38 is fitted to the coupler contact surface 37a of the protective cover 37 as shown in FIG. The socket 38 c of the cap 38 is fitted into the boss 40 b of the cap holder 40. That is, when the quick coupler is used, the protective cover 37 is fixed to the cap holder 40 via the protective cap 38, and the loss of the protective cover 37 can be prevented. At this time, since the coupler contact surface 37a of the protective cover 37 is covered with the plug 38a of the protective cap 38, the coupler contact surface 37a of the protective cover 37 is not soiled by scattering of pebbles or muddy water.
[0026]
When the work coupler is separated from the tractor and the quick coupler is detached, as shown in FIG. 8, the coupler contact surface 37 a of the protective cover 37 is brought into contact with the front surface of the coupler 19 to cover the protective cover 37. The connection portion of the coupler 19 when not in use is covered so as not to be exposed. As described above, since the coupler contact surface 37a of the protective cover 37 is covered when the coupler 19 is used, the coupler 19 is not soiled. The possibility that foreign matters such as the above will adhere is eliminated.
[0027]
Further, as shown in the figure, the protective cap 38 is turned upside down, and a plug 38a provided on one side surface of the protective cap 38 is fitted into the storage portion 40a of the cap holder 40 to cover the plug 38a. Prevents dirt from mud water. Therefore, when the quick coupler is used, when the plug 38a is fitted again to the protective cover 37 as shown in FIG. 7, dirt or the like does not adhere to the coupler contact surface 37a of the protective cover 37. .
[0028]
On the other hand, the socket 38c provided on the other side surface of the protective cap 38 may be soiled by scattering of muddy water in the state shown in FIG. 8, but the protective cap 38 is fixed to the cap holder 40 when the quick coupler is used. In doing so, as shown in FIG. 7, the socket 38c does not contact the storage portion 40a of the cap holder 40, so that dirt or the like does not adhere to the storage portion 40a.
[0029]
Thus, regardless of whether the quick coupler is used or not, the coupler contact surface 37a of the protective cover 37 and the plug 38a of the protective cap 38 are always protected from dirt and the like.
[0030]
FIG. 9 shows a state where the quick coupler is connected. The electric cable 41 of the coupler 19 on the tractor side is connected to the controller 42, and the monitor lamp 43a of the display device 43 is turned on to notify that the quick coupler is being connected. . On the other hand, the electric cable 44 of the coupler 27 on the working machine side is provided with a socket 44a for an electric motor harness for automatically rotating the rotary cover, a socket 44b for a depth sensor harness, and a socket 44c for taking out external power. ing. Energization of the sockets 44a and 44b is turned on and off by an operation switch provided on the tractor side, and the monitor lamp 43b or 44b of the display device 43 is turned on to notify which socket is being energized.
[0031]
For example, when a fertilizer seeding machine is additionally provided in the rotary working machine, a plug of a harness for a feeding roll drive electric motor is connected to the socket 44c for taking out the external power source. When removing and installing the rotary work machine, the quick coupler and the quick coupler are coupled and separated, and the electric cables 41 and 44 of both the tractor and the work machine are automatically connected and disconnected. There is no need to insert and remove, which simplifies the work and prevents the harness from being cut off. In addition, when the auxiliary flat plate is attached to the left and right ends of the rotary rear cover, the external power supply socket 44c is connected to a plug of a harness for an electric cylinder that opens and closes the auxiliary flat plate. You can connect the power supply of additional equipment.
[0032]
The additional device connected to the socket 44c for taking out the external power supply may be operated by providing a switch on the work machine side, or may be operated from the driver's seat by providing a new switch on the tractor side. . If the controller 42 is provided with an electric cable selector switch and the rotary switch is connected to the electric cable of the external power supply socket 44c when the rotary is not used, the rotary switch The additional device can be operated, and there is no need to provide a new switch. Further, the harness of the additional device is connected to the socket 44b by making the shape of the socket common so that the harness plug of the additional device can be connected to the socket 44b of the harness for the electric motor for automatically rotating the rotary cover. The additional device can be operated by the rotary rotation operation switch.
[0033]
It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.
[0034]
【The invention's effect】
As described in detail in the first embodiment, the present invention provides a safety cover that surrounds the side surface of the coupler, and a protection that is larger than the outer dimensions of the safety cover and is hinged to be openable and closable on one side of the safety cover. A quick coupler formed so as to expose or cover the coupler by opening and closing the protective cover, and the protective cover is a seal portion that contacts and separates from the outer edge of the safety cover When the coupler is closed and closed by the protective cover after work, the seal part that is provided inside the protective cover comes into contact with the outer edge of the safety cover, and the inner surface of the protective cover Does not directly contact the coupler, so that foreign matters such as dirt and mud adhering to the protective cover do not contaminate the coupler.
[0035]
Further, according to the present invention, the electrical cable of the work machine side quick coupler is provided with a plurality of sockets including a socket for taking out an external power supply, and energization to the socket is performed by turning on a changeover switch provided in the controller. In addition to being operated in the off state, the monitor lamp of the display device is turned on in response to energization of these sockets. For example, when a fertilizer seeding machine is additionally installed, the harness plug for the feeding roll drive power supply motor is connected. When the rotary work machine is detached, the quick coupler and the quick coupler are coupled and separated, and both the tractor and the work machine are connected. Since the electrical cable of the fertilizer seeder is automatically connected and disconnected, there is no need to connect or disconnect the harness connector Work can be prevented against breakage of the harness while being simplified, it is possible to connect the power supply of various additional equipment together. Furthermore, there is an accompanying effect that a socket lamp in the display device is turned on in response to energization of the socket, thereby informing which socket is energized.
Thus, according to the present invention, it is possible to prevent the coupler from being soiled even when the coupler is used or not used, and to easily and reliably protect the coupler with an inexpensive device. .
[Brief description of the drawings]
FIG. 1 is a perspective view of a quick hitch in a state where an embodiment of the present invention is not connected to a work machine.
2A is a partially cutaway side view of a coupler in a protective cover open state, and FIG. 2B is a partially cutaway side view of a coupler in a protective cover closed state.
FIGS. 3A and 3B show another embodiment, in which FIG. 3A is a partially cutaway side view of a coupler on the working machine side when the protective cover is closed, and FIG. 3B is a partially cutaway side view of the tractor side coupler when the protective cover is closed. Figure.
4 is a partially cutaway side view showing a state in which both couplers of FIG. 3 are connected.
FIG. 5 is a perspective view of the quick hitch in a state where the working machine is not connected, showing still another embodiment.
6 is a vertical side view of a protective cover, a protective cap, and a cap holder of the coupler shown in FIG. 5;
7 is a vertical side view of a protective cover, a protective cap, and a cap holder when the coupler shown in FIG. 5 is used.
8 is a vertical side view of a protective cover, a protective cap, and a cap holder when the coupler shown in FIG. 5 is not used.
FIG. 9 is an explanatory diagram of a power cable and a socket in a state where a quick coupler is connected.
[Explanation of symbols]
11 Quick hitch 19 Coupler 20 Safety cover 22 Protective cover 25 Seal part 27 Coupler

Claims (1)

Quick hitch for working machine coupled to the rear of the tractor is provided, and the controller of the tractor side to the quick hitch, Ri quick coupler der fitted with working machine side of the sensor and the coupler for electrical cable connection for connecting the motor, the quick coupler, and a protective cover which is openably hinged to one side of and Deposit cover Deposit cover and large than the outer dimensions of the Deposit cover surrounding the side surface portion of the coupler, this protective cover the a quick coupler that formed was to expose or the蔽closing to the coupler, as well as fixed upper hook at the top center position of the hitch frame of gate-shaped, the lower right and left lower edge portions of the hitch frame A hook is provided, and a base is fixed to one lower end portion of the hitch frame. Replace the the tee cover and protective cover, further, a quick in the state in which the coupler is connected at the configured quick coupler of the tractor so as to turn on the monitor lamp with a tractor,
The protective cover is provided with a seal portion that is in contact with and away from the outer edge of the safety cover, and a plurality of monitor lamps that notify the tractor-side electric cable that the quick coupler is connected. A display device for turning on the monitor lamp is connected via the controller. On the other hand, the electrical cable of the work machine side quick coupler is provided with a plurality of sockets including a socket for taking out an external power supply, The power supply to the socket is operated by turning on and off the changeover switch provided in the controller, and the monitor lamp of the display device is turned on in response to the power supply to these sockets. Quick coupler of tractor characterized by

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