JPH067585Y2 - Wiring connection structure between towing vehicle and work implement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an improvement of a cable coupler that allows a harness to be detached when a work implement is detached from a towing vehicle.

(Prior Art) In an agricultural work tractor or the like, various electric devices may be attached to both the towing vehicle and the work device in order to automatically control the work device, and these electric devices may be electrically coupled by a harness. In such a case, a cable coupler consisting of a plug and a connector is provided in the middle of the harness, and the harness can be separated at this cable coupler portion (see Japanese Utility Model Laid-Open No. 59-98705). In particular,
A cable coupler is provided on the side of the towing vehicle for connecting to the tilling depth sensor and the left / right inclination sensor provided on the rotary working machine.

(Problems to be solved by the invention) By the way, in agricultural work tractors and the like, various work machines may be replaced depending on the work purpose, and when a work machine without a sensor is used or the work machine is removed, If the plug or the terminal portion of the connector is not sealed, mud and water may enter.

It is necessary to cover the plug with a plug seal cap and insert the connector seal plug into the connector. In this case, there is no problem because the plug and the connector are connected to each other, but the removed plug seal cap or connector seal plug is left as it is in mud or water. As a result, the plug seal cap and the connector seal plug may be soiled and deteriorated, the waterproof function may be deteriorated, and a fitting failure may occur.

(Means for Solving the Problems) In order to solve the above problems, the present invention relates to an electric device mounted on a towing vehicle and an electric device mounted on a work machine detachably attached to the towing vehicle by a cable. In a wiring connection structure between a towing vehicle and a working machine configured to perform wiring connection via a coupler, a pair of the cable coupler is provided on either the towing vehicle side or the working machine side, and this plug. A plug seal cap that can be detachably fitted to the connector, and a connector provided on the other side and a connector seal plug that can be detachably fitted to this connector, and in a state where the plug and the connector are combined, The plug seal cap and the connector seal cap should not fall off on the towing vehicle side and the working machine side, respectively. It retained, and wherein said plug seal cap and said connector sealing plug together is mateable configured respectively.

(Operation) When working with a work machine that does not require wiring connection, connect the plug seal cap (or connector seal plug) to the plug (or connector) on the towing vehicle side to remove mud or water. Etc. are prevented from entering. Since the plug seal cap (or the connector seal plug) is held on the towing vehicle side so as not to fall off, there is no fear of loss.

When a work machine that requires wiring connection is installed, the plug and connector are connected to each other, while the removed plug seal cap and connector seal plug are connected to each other to prevent the entry of mud, water, etc. .

(Embodiment) An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side view of a towing vehicle with a working machine according to the present invention.

The towing vehicle 1 of the present embodiment is a tractor, and includes front and rear wheels 3 and 3 and rear wheels 4 and 4 of a vehicle body frame 2, and a power take-off shaft 5 and a work implement mounting device 6 at the rear portion.

A propulsion shaft 7 including a universal joint is fitted to the power take-off shaft 5,
A work machine, which will be described later, is forcibly driven by this propulsion shaft.

The work implement mounting device 6 supports the work implement and also serves to regulate the height and inclination of the work implement. For example, the lower links 6a, 6a, the upper ring 6b, the lift arm 6c, and this lift arm can be raised and lowered. And a hydraulic cylinder (not shown) that is driven.

The work implement 8 is, for example, a rotary tiller including a rear cover 9a swingably attached to a rear portion of a housing 9 suspended by the work implement mounting device 6.

Further, 9b is a working depth sensor, which is configured to detect the amount of rocking of the rear cover 9a to detect the working depth of the work implement 8. The work machine 8 receives power from the power take-off shaft 5 while being towed by the towing vehicle 1, and receives this power from the propulsion shaft 7, the gear case 11a, the horizontal shaft 11b, the sprocket 11c, the chain 11d, the sprocket 11c,
The plowing shaft 10 is transmitted in this order, and the plowing blades 10a are turned to perform plowing work.

FIG. 2 is a view showing a state in which electric equipment and wiring (hereinafter referred to as a harness) are arranged on the towing vehicle 1 and the working machine 8. In the figure, 12 is a light harness for connecting to a light and a direction indicator light. 13 is a main harness, 14 is a working depth sensor 9b
It is a harness for a sensor connected to. The other ends of these harnesses 12 to 14 are control units 15 (hereinafter, referred to as E
(Hereinafter referred to as CU) via the ECU harness 16. In the present embodiment, because the rear fender 18 on the right side of the levers 17 operated by the occupant's right hand,
The ECU 15 is near the levers 17, that is, the rear fender 1
8 is stored inside.

The ECU harness 16 and the other harnesses 12, 1
As shown in the drawing, the connection position with the third member 3 is set near the base end of the right lower ring 6a slightly inside the right rear wheel on the rear surface of the vehicle, and the coupler box 19 is fixed at this position.

The coupler box 19 is a closed box and can be opened and closed.
9a, and this lid is directed rearward. The harnesses 12, 13, 16 penetrate through the wall of the coupler box 19 and are connected by a cable coupler (not shown) in the coupler box.

However, only the sensor harness 14 extending from the working depth sensor mounted on the working machine 8 is different. This harness 14
The connector 2 is inserted into the plug 21 that is provided so as to penetrate the wall of the coupler box 19 and project toward the upper surface of the lid 19a, that is, the rear of the vehicle body.
They are connected by fitting two.

FIG. 3 is a mechanical view of the cable coupler 20 including the plug 21 and the connector 22, and the plug 21 is the lid 1.
It is fixed to the vehicle body side with screws 21a, 21a in a state of penetrating 9a, and a claw 21b is projected on the side surface of the plug.

On the other hand, the connector 22 at the tip of the harness 14 is fitted into the plug 21 to make electrical connection. The opening / closing claw 22a provided on the connector 22 meshes with the claw 21b of the plug to prevent the cable coupler 20 from coming off. Further, the O-ring 22b built in the connector 22 is in close contact with the plug 21 to form a waterproof structure of the cable coupler 20.

A cap-shaped plug seal cap 23 having the same shape as the connector 22 and having an O-ring 23b is attached to the lid 19a via a belt 23a. Further, the harness 14 has the same shape as the plug 21 and has the claw 24b.
The connector seal plug 24 having the above is attached via the belt 24a. The belts 23a and 24a have a length necessary for the operation described later.

The plug 21, connector 22, plug seal cap 23, and connector seal plug 24 constitute a cable coupler mechanism, and its operation will be described below.

FIG. 4 (a) is an operation diagram showing a procedure after the work implement 8 is removed from the towing vehicle 1. In FIG. 1, the propulsion shaft 7 is removed from the power take-off shaft 5, the work implement mounting device 6 is separated, and the connector 22 of the cable coupler 20 is plugged into the plug 21.
After being separated from the plug 21, as shown in FIG.
The plug seal cap 23 is fitted and the connector seal plug 24 is inserted into the connector 22.

Therefore, the connector 22 of the removed work machine 8 and the tow vehicle 1 are removed.
Since the terminal portions of the plug 21 and the plug 21 are sealed by the connector seal plug and the plug seal cap 23, muddy water and the like can be prevented from entering this portion even in the unused state.

FIG. 4 (b) is an action diagram showing a procedure when the work implement 8 is attached to the tow vehicle 1. The propulsion shaft 7 is attached to the power take-off shaft 5, the work implement mounting device 6 is brought into a coupled state, and The connector 22 is fitted into the plug 21. On the other hand, the connector seal plug 24 is inserted into the removed plug seal cap 23.

Since the plug 21 and the connector 22, and the plug seal cap 23 and the connector seal plug 24 are closely fitted to each other, they seal each other, and particularly the storage of the plug seal cap 23 and the connector seal plug 24 is easy. At the same time, if necessary, the plug 21 and the connector 22 immediately upon removal work of the working machine 8 as described above are immediately performed.
It is possible to handle the sealing work of the terminal part of.

A holding portion 24c is formed on the connector seal plug 24, and the holding portion 2 is kept in a state in which the plug seal cap 23 and the connector seal plug 24 are fitted to each other.
By engaging and holding 4c with the harness 14, it becomes possible to prevent wobbling.

Since the plug 21 is fixed to the coupler box 19 arranged on the rear surface of the vehicle body in this embodiment, the connector 22 can be attached and detached with only one hand.

(Effect of the Invention) As described above, according to the present invention, the cable cover mechanism is skillfully configured with the plug, the connector, the connector seal plug, and the plug seal cap. It is possible to easily store the components while maintaining the sealing function, and it is possible to easily deal with the sealing work of the terminal portion accompanying the replacement of the working machine. In particular, when a work machine that requires wiring connection is installed in the towing vehicle, the plug and the connector are connected to each other, while the removed plug seal cap and the connector seal plug are connected to each other. It is possible to prevent mud, water, and the like from invading the plug seal cap and the connector seal plug.

[Brief description of drawings]

FIG. 1 is a side view of a tow vehicle with a working machine according to the present invention, FIG. 2 is a perspective view from the rear, FIG. 3 is a cable coupler mechanism diagram, and FIGS. 4 (a) and 4 (b) are operation diagrams. is there. 1 ... Towing vehicle 8 ... Working machine 20 ... Cable coupler 21 ... Plug 22 ... Connector 23 ... Plug seal cap 24 ... Connector seal plug

Claims (1)

[Scope of utility model registration request] 1. A towing vehicle and a work in which an electric device mounted on a towing vehicle and an electric device mounted on a work machine detachably attached to the towing vehicle are connected by wiring through a cable coupler. In the wiring connection structure with a machine, the pair of the cable couplers includes a plug provided on either the towing vehicle side or the working machine side, a plug seal cap detachably fitted to the plug, and the other. And a connector seal plug removably fitted to the connector, and in a state where the plug and the connector are combined, the plug seal cap and the connector seal plug are on the towing vehicle side. And the work machine side so as not to fall off, and the plug seal cap and the connector. Wiring connection structure between the towing vehicle and working machine, characterized in that Kuta seal between plugs is mateable configured respectively.