JP2008038532A - Device for simple start of engine of hydraulic excavator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for simple start of an engine of a hydraulic excavator which is provided with a cabin 4 having an electrical machinery chamber 11, which is provided with the circuit for start and drive of the engine, and which makes possible the traveling of a body by starting the engine E in a state that the cabin 4 has been removed from an upper rotating body 2 for the transfer on the road or the like. <P>SOLUTION: The start and drive of the engine E can be performed by connecting connectors 15a to 15h to connectors 17a to 17g. The connectors 15a to 15h are removed from the connector 14 on the electrical machinery chamber 11 side. The connectors 17a to 17g are provided to a harness 16 for simple start, and electrical appliances 19 to 24 necessary for the start and drive of the engine are connected to the harness 16 for simple start. Thus, the start and drive of the engine E can be performed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention belongs to the technical field of a simple engine starting device for a cab specification hydraulic excavator.

Some hydraulic excavators have a cab specification in which the driving cockpit provided in the upper swing body is covered with a cab. In this type, a starter switch for starting the engine is provided in the driving cockpit. Electrical devices such as motors are provided outside the cab room. For this reason, the engine start circuit constituted by connecting them is wired over the inside and outside of the cab. When wiring inside and outside of such a cab, make sure to provide electrical equipment on the cab side to secure space in the cab and to improve workability by attaching electrical equipment to the cab before installation. Is proposed (see, for example, Patent Document 1).
JP 2003-56008 A

  However, when a hydraulic excavator is mounted on a loading platform such as a truck or a wagon, the cab may be too high to be transported with the cab attached. In such a case, the cab may be removed and the cab may be removed. Will be transported. However, if the cab has engine start and drive wiring, the cab will be disconnected from the electrical connection by removing the connector when removing the cab. The hydraulic excavator in a state where it has been removed cannot start the engine, and there is a problem that the self-propulsion for getting on and off the loading platform cannot be performed as it is, and there is a problem that the present invention does not solve.

  The present invention was created with the object of solving these problems in view of the above circumstances, and the invention of claim 1 includes an upper swing body in a lower traveling body, and the upper swing body in the upper swing body. An engine that drives a starter motor by receiving power from a battery provided outside the cab in a start operation of a starter switch provided in the operation cockpit in a hydraulic excavator that is covered with a cab that can be freely removed from the operation cockpit provided. When the start and drive circuit wiring is applied to the cab to connect the inside and outside of the cab, the engine start and drive circuit wiring provided on the cab are connected to connectors such as terminals and connectors. Forming a harness for simple engine startup that includes connectors and electrical equipment such as relays necessary for engine startup, and removing the cab Engine start state, a drive, an engine simple starting device for a hydraulic excavator which is characterized by being configured to perform by connecting the engine simple starting harness.

  According to the first aspect of the present invention, the engine is started and the drive circuit is wired to the cab to connect the inside and outside of the cab. It can be easily done by connecting.

  Next, embodiments of the present invention will be described with reference to the drawings. In the figure, reference numeral 1 denotes a lower traveling body of a hydraulic excavator, and 2 an upper revolving body provided on the lower traveling body 1 so as to be freely rotatable. The upper revolving body 2 includes a front attachment 3, a cab 4 described later, an engine. It is the same as before that it is configured using various member devices such as E and the bonnet 6 that houses the battery 5.

  The cab 4 covers the driver's cockpit 7 and is configured to be removable from the upper swing body 2 independently. However, a console disposed on the lateral side of the driver's cockpit 7. The box 8 is provided with a starter switch 9 and a joystick lever 10 so that necessary operations such as engine starting operation, running, turning, attachment operation and the like can be performed.

  On the other hand, the cab 4 is provided with an electric room 11 in which various electric and electronic devices are provided so as to be located in the cab 4, and the electric room 11 is used for operating the starter switch 9, the joystick lever 10, and the like. Signals from various electrical devices such as tools, sensors (not shown) and switches are input, and based on this, necessary control signals are output to various actuators. A part of the driving circuit is provided. In addition to electronic devices such as start control relays, timer relays, and neutral start relays necessary for starting the engine, the engine start and drive circuit include a horn relay (in order to alert the horn H when the engine is started) Neither is shown). When the starter switch 9 is operated to start, the engine E is started, and the horn H is blown. After the engine is started, the starter switch 9 is turned to the ON position so that the starter motor S is driven to start the engine E. It has become.

  The electrical chamber 11 includes various control devices such as a control unit (the drawing shows only the external control unit) 13 provided inside and / or outside via a harness 12, a battery 5, a starter motor S, an engine E, and the like. Is connected to the starter switch 9 via the harness 12a, and necessary control as a hydraulic excavator is executed. The electrical chamber 11 and these harnesses 12 and 12a are connected to the connectors 14 and 15, respectively. Connected through.

  Reference numeral 16 denotes a harness for a simple start of the engine. In this embodiment, six connectors (including terminals) 17a to 17f are provided on one connection side of the harness 16. 17a is a connector for a power supply terminal, and the remaining connectors 17b to 17f are connectors for connecting to a control circuit necessary for starting and driving the engine E, and are connectors provided in the electric chamber 11. 14 is connected to the connectors 15a to 15f on the harness 12 side removed from the connector 14.

  On the other hand, in the present embodiment, one connector 17g is provided on the other connection side of the harness 16, and a switch circuit 9a provided with a starter switch 9 is connected to the connector 17g in the electrical room 11. A connector 15g for connection is connected. Furthermore, the harness 16 has a plurality of fuses (a part corresponding to the fuse is provided in the electrical chamber 11) 19 for protecting a power supply circuit necessary for starting and driving the engine, and prevents current from flowing backward. Diode circuit (corresponding to the circuit is provided in the electrical chamber 11) 20, a relay 21 corresponding to the start control relay and neutral start relay, a timer relay 24, and a horn for sounding A horn relay 22 is provided, and a resistance circuit 23 necessary for starting the engine and communicating is provided.

  When the cab 4 is removed from the upper swing body 2, the connector 14 of the cab-side electrical chamber 11 and the connector 15 on the harness 12, 12 a side are removed, and traveling is required without the cab 4. In this case, the simple start harness 16 is brought and the corresponding connectors 17a to 17g are connected to the corresponding connectors 15a to 15h on the harnesses 12 and 12a side. When the starter switch 9 is started, the starter motor S is driven and the engine E is started.

  In the embodiment of the present invention configured as described above, when it is desired to run the vehicle with the cab 4 removed from the upper swing body 2, a simple start harness 16 is brought from the connector 14 of the cab-side electrical chamber 11. Corresponding connectors 17a to 17g provided on the simple starting harness 16 are connected to the removed connectors 12a to 15h on the harnesses 12 and 12a side. When the starter switch 9 is started, the starter motor S is driven and the engine E is started.

  Thus, in the case where the present invention is implemented, even if an engine start and drive circuit is provided on the cab 4 side, the vehicle can travel with the cab 4 removed, and the vehicle is transported. Aircraft moving work at the time becomes easy. In addition to this, not only the connectors 17a to 17g corresponding to the connectors 15a to 15h removed from the electrical chamber 11 are provided in the simple start harness 16, but also the electric devices 19, 20, Since 21, 22, 23 and 24 are provided, the engine can be started and driven stably.

It is a schematic side view of a hydraulic excavator. It is the schematic which shows the connection state in the attachment state of a cab. It is a wiring diagram which shows the state which connected the harness for simple starting.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper revolving body 4 Cab 5 Battery 5
9 Starter Switch 11 Electrical Room 12, 12a Harness 14 Connector 15 Connector 16 Simple Start Harness 17 Connector

Claims (1)

  In a hydraulic excavator comprising an upper swing body in a lower traveling body and a driving cockpit provided on the upper swing body being covered with a detachable cab, the starter switch provided in the driving cockpit can be operated to start out of the cab. Starting the engine to drive the starter motor by receiving power from the provided battery, wiring the drive circuit to the cab and connecting the inside and outside of the cab, engine start and drive circuit wiring provided in the cab Form a harness for easy engine startup, which includes connectors for connecting the connectors, connectors such as connectors, and electrical equipment such as relays necessary for engine startup, and remove the cab The engine can be started and driven in a connected state by connecting the engine simple start harness. Yoberu of engine simple start-up equipment.

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