JP5538774B2 - Power supply system for on-board crane - Google Patents

Description

  The present invention relates to a vehicle-mounted crane mounted on a vehicle such as a truck, and more particularly to a power supply system for supplying electric power necessary for a controller of a crane body.

2. Description of the Related Art Conventionally, a vehicle-mounted crane includes a plurality of actuators that are driven by pressure oil from a hydraulic pump, and a controller that controls a crane body including control valves such as those actuators (for example, Patent Document 1). reference).
The hydraulic pump uses a vehicle engine such as a truck as a power source, and operates via a PTO (power take-off) connected to the vehicle engine. In addition, the controller power is supplied from a vehicle-side battery by turning on and off a switch that works in conjunction with on-off of the PTO of the vehicle.

  When starting crane work with this type of crane, the operator first turns off the clutch of the vehicle and then puts in the PTO after starting the engine of the vehicle. When the PTO is turned on, the controller power supply is automatically turned on / off by a switch that works in conjunction with the on / off of the vehicle's PTO. Is supplied via the PTO switch, and when the clutch of the vehicle is further engaged, simultaneously, the hydraulic pump starts rotating via the PTO and pressure oil is supplied to the control valve of the crane.

JP 2003-252569 A

By the way, in the construction work of this kind of vehicle-mounted crane, it is necessary to assemble the crane main body in a post-process with respect to various already completed vehicles.
Conventionally, however, in a crane for mounting on a vehicle, as described above, since the controller of the crane body is operated by supplying necessary power from the battery on the vehicle side, the crane body is mounted on the vehicle to be mounted. When installed, there are the following problems.

  That is, in order to secure the necessary power supply for the crane body, in order to supply power from the vehicle-side battery, first remove the instrument panel if necessary, and then a connector that can be connected to the power harness of the vehicle Is required to connect the PTO switch wiring to the connector and then return the removed instrument panel to its original state.

  Such wiring work and instrument panel installation / removal must be performed in a narrow cab, and work must be done with great care so as not to damage the instrument panel, interior parts, etc. . Furthermore, many recent vehicles are equipped with electronic devices such as a tachograph, a car navigation system, and an ETC with a built-in computer. Therefore, much more labor is required for attaching and detaching the instrument panel.

Moreover, the wiring connected to the connector etc. in the cab needs to be connected to the controller of the crane body. Therefore, depending on the vehicle, it is necessary to open a hole for that purpose in the vehicle and to pull out the wiring to connect to the outside of the vehicle behind the cab from the cab, and add such a hole to the already completed vehicle. It is not preferable to work.
Furthermore, the specifications of the type of PTO and the connection part of the harness vary depending on the vehicle manufacturer. For this reason, in the construction work of a crane for mounting on a vehicle, a plurality of construction drawings for dedicated parts and wiring work are required in accordance with the specifications of each vehicle manufacturer, making the construction work more difficult.

  Therefore, the present invention has been made paying attention to such a problem, and reduces labor in the bodywork work, and even if the vehicle side specifications are different, according to one work procedure. An object of the present invention is to provide a power supply system for a vehicle-mounted crane capable of performing a bodywork operation.

In order to solve the above problems, the present invention is a power supply system for a vehicle-mounted crane mounted on a vehicle, wherein the vehicle-mounted crane is used as a hydraulic pump for driving a crane body. the engine comprises only hydraulic pump to a power source, a generator for power generation only by the output of the engine is arranged to operate through a concatenated PTO to the engine, the power generation by the generator A controller for controlling the crane body by receiving the supplied power and a battery dedicated to the vehicle-mounted crane charged by the generator , and the battery dedicated to the vehicle-mounted crane includes: It is connected to the controller via a switch that is linked to the on-off of the PTO, and when the switch is on, the vehicle-side battery and the PTO Wherein the controller is supplied power to the controller without connecting the switch is characterized in that it is adapted to start.
According to the power supply system for a crane mounted on a vehicle according to the present invention, a controller that controls the crane body is arranged so as to operate via the PTO, and the necessary electric power is generated from a generator that can generate electricity at the output of the engine. Since it operates without connecting the vehicle-side battery and the PTO switch upon receipt of the supply, it is not necessary to connect the vehicle-side battery and the PTO switch. Therefore, there is no need for dedicated parts and wiring drawings for wiring work that match the specifications of each vehicle manufacturer. Therefore, the labor in the bodywork can be reduced, and the bodywork can be performed by one work procedure even when the vehicle-side specifications are different.

  In addition, since the operation of the hydraulic pump is directly related to the operation of energizing the crane body, for example, the PTO is turned off even when the PTO switch is turned on, that is, the hydraulic pump is not operating. Even if this occurs, since the hydraulic pump is not operating, the generator will not operate and power will not be supplied to the crane body, preventing the crane body from malfunctioning and monitoring the hydraulic pump operation. Also useful for functionality.

A battery dedicated to the crane for mounting on the vehicle is connected to the controller via a switch that works in conjunction with the on-off of the PTO, and connects the vehicle-side battery and the PTO switch when the switch is on. Since the controller is started by supplying power to the controller without any problems, it is suitable for stabilizing the power supply by suppressing voltage fluctuations etc. It is. In addition, by connecting a switch that works in conjunction with PTO on-off to a battery dedicated to a vehicle-mounted crane, the construction process can be set up in accordance with the construction procedure in the conventional bodywork. Therefore, it is easy for the operator to learn and publicize the wiring work by the power supply system for the crane for mounting on a vehicle according to the present invention, which is suitable for smooth transition from the conventional power supply system to the power supply system of the present application. It is.

Incidentally, in the power supply system of a vehicle mounting a crane according to the present invention, for example, the generator, to the PTO, it is possible through a reduction gear connected in parallel with the hydraulic pump. Further, for example, the generator, to the PTO, it is possible through a belt reduction gear is connected in parallel with the hydraulic pump. Further, for example, the generator may be connected in series to the hydraulic pump.

  As described above, according to the power supply system for a vehicle-mounted crane according to the present invention, the power supply from the battery on the vehicle side is unnecessary, and labor for the bodywork is reduced, and the specification on the vehicle side is reduced. Even if they are different, it is possible to perform the bodywork by one work procedure.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic explanatory drawing of one Embodiment of the crane for vehicle mounting provided with the power supply system of the crane for vehicle mounting concerning this invention, The figure is the side view. It is a block diagram explaining the drive system and power supply system of a crane for vehicle mounting. It is a principal part enlarged view of a hydraulic pump and a generator part connected to the PTO output shaft (PTO shaft) connected with the engine of the pressure oil supply device concerning the present invention, and the same figure (a) is shown in FIG. It is a principal part enlarged view in embodiment shown. It is a figure explaining a PTO connection detection switch. It is a figure explaining the modification of the structure of the drive system of the crane for vehicle mounting concerning this invention, The figure has shown the figure corresponding to FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate.
As shown in FIG. 1, this vehicle-mounted crane includes a crane body 6 that is mounted on a vehicle 10 such as a truck. The crane body 6 has a base 17 connected and fixed on a chassis frame 19 between the loading platform 16 of the vehicle 10 and the cab 11. A column 12 is provided on the base 17 so as to be pivotable, and a boom which is a multistage telescopic boom having an actuator driven by pressure oil from the hydraulic pump 2 shown in FIG. 13 is pivotally supported in an up and down manner. The column 12 is provided with a winch (not shown). A wire rope 14 is led from the winch to the tip of the boom 13 and hooked via a pulley (not shown) at the tip of the boom 13. By hooking 15, the hook 15 is suspended from the tip of the boom 13. Outriggers 18 are provided on the left and right sides of the base 17.

Next, the structure of the drive system and power supply system of the above-mentioned crane mounted on a vehicle will be described with reference to FIGS. 1 and 2 as appropriate.
As shown in FIG. 2, the crane for mounting on a vehicle includes a hydraulic pump 2. The hydraulic pump 2 uses the engine 1 of the vehicle 10 as a power source, and operates via a PTO (power take-off) 1 a connected to the engine 1.

  In the hydraulic pump 2, the pressure oil discharged from the hydraulic pump 2 is supplied to the main pipeline 27, and the main pipeline 27 is connected to the control valve 3 that operates the plurality of actuators of the crane body 6. . The return pipe 29 of the control valve 3 is connected to the tank 28. In the control valve 3, a plurality of switching valves for driving the actuators of the crane body 6 are provided for each actuator.

Furthermore, a generator 7 is connected to the engine 1 so as to operate via the PTO 1a and can generate electricity with the output of the engine 1. In the power supply system 8 of the present embodiment, the generator 7 is connected to the PTO 1a in parallel with the hydraulic pump 2 via the reduction mechanism 40a of the gear reducer 40, as shown in FIG. ing.
An electric circuit (not shown) necessary for control or drive is interposed between the devices such as the engine 1 and the control valve 3, and these electric circuits are connected to the controller 4 of the crane body 6. It is connected so that necessary signals can be exchanged.

  For example, as shown in FIG. 2, each switching valve of the crane body 6 is connected to the controller 4 via a signal line 3 s and is based on a control signal from the controller 4 in response to an operation signal from the operation panel 5. Thus, the switching operation of the oil passage of each switching valve is appropriately executed. The controller 4 is configured such that the generator 7 supplies power necessary for driving the switching valves of the actuators and the actuators.

  Specifically, as shown in FIG. 2, the power supply system 8 of the present embodiment includes batteries 23 connected to each other so as to be able to charge from the generator 7 and supply power to the controller 4. Yes. This battery 23 is a battery dedicated to the crane body 6 and is provided separately from the battery (not shown) of the vehicle 10 and is connected via the regulator 20 so that charging from the generator 7 is possible.

  That is, the AC power generation of the generator 7 due to the rotation of the engine 1 is converted to DC by the regulator 20 and then led to the battery 23, and the battery 23 is charged. Further, the current from the battery 23 is converted into a predetermined current by an inverter (not shown) in the controller 4 and the converted current is appropriately supplied to each part of the controller 4 so that control corresponding to the request can be performed. It has been made. Further, the power supply system for the on-vehicle crane has a charger 9 as shown in FIG. The charger 9 has a connector 9a connected to a connector 23a on the battery 23 side, and can thereby supply (charge) power to the battery 23 from an external power source.

Further, the battery 23 is connected to the controller 4 via the PTO connection detection switch 50, and is connected to be able to supply necessary power to the controller 4 when the PTO connection detection switch 50 is in the on state.
Specifically, in the cab 11 of the vehicle 10, a PTO operation knob 94 for performing an on-off operation of the PTO 1 a is attached to the operation panel 90 as shown in an enlarged view of the main part in FIG. 4. The PTO connection detection switch 50 is provided on the back surface of the operation panel 90 to which the PTO operation knob 94 is attached.

  The PTO connection detection switch 50 is a so-called push plunger type position detection switch (limit switch), and two terminals 50a and 50b of the PTO connection detection switch 50 are connected to a power supply line 38, respectively, one of which is the above-described one. The other side of the battery 23 is connected to the controller 4. When the PTO operation knob 94 is pulled out from the cab 11, the enlarged diameter portion 94 k is in a non-contact state with the plunger 51. As a result, the PTO connection detection switch 50 is turned on, and power is supplied to the controller 4 from the battery 23 dedicated to the vehicle-mounted crane so that the controller 4 is activated. When the clutch of the vehicle 10 is connected, the hydraulic pump 2 starts rotating simultaneously with the PTO 1 a and pressure oil is supplied to the control valve 3 of the crane body 6. When the PTO operation knob 94 is pushed in, the enlarged diameter portion 94k at the base end position of the PTO operation knob 94 comes into contact with the plunger 51 of the PTO connection detection switch 50 in conjunction with this. As a result, the plunger 51 returns to a predetermined position, the controller 4 enters an off state, and the hydraulic pump 2 stops supplying pressure oil.

Next, the construction work of the vehicle-mounted crane and the operation and effect of the power supply system 8 will be described.
As described above, according to the power supply system 8, the controller 4 that controls the crane body 6 operates by receiving necessary power from the generator 7 that can generate power with the output of the engine 1. It is not necessary to connect the power line 38 to the battery on the side. For this reason, in the installation work of this crane mounted on a vehicle, there is no need for special parts and construction drawings for wiring work that match the specifications of each vehicle manufacturer, reducing labor in the installation work, Even if the specifications are different, the bodywork can be performed by one work procedure.

  In addition, since the operation of the hydraulic pump 2 is directly related to the energization operation to the crane body 6, for example, the PTO 1a is in the off state, that is, the hydraulic pump 2 is in operation, even though the PTO switch is on. Even if there is no malfunction, the hydraulic pump 2 is not in operation, so the generator 7 is not in operation and no power is supplied to the crane body 6, preventing malfunction of the crane body 6. It is also useful for monitoring the hydraulic pump operation.

  In particular, according to the power supply system 8, the vehicle-mounted crane-dedicated battery 23 is further provided, and the battery 23 is connected to the controller 4 via the PTO connection detection switch 50 interlocked with the on-off of the PTO 1a. When the switch 50 is on, power is supplied to the controller 4 so that the controller 4 is activated, so that it is possible to suppress voltage fluctuations and stabilize the power supply, By connecting the PTO connection detection switch 50 linked to the on-off of the PTO 1a to the battery 23, the construction process can be set up in accordance with the construction procedure in the conventional bodywork work. Is also easy.

In addition, the power supply system of the crane for mounting on a vehicle according to the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.
For example, in the above embodiment, the generator 7 has been described as an example in which the generator 7 is connected to the PTO 1a in parallel with the hydraulic pump 2 via the gear reducer 40 as shown in FIG. It is not limited. For example, as shown in FIG. 5, the PTO 1a is connected in parallel to the hydraulic pump 2 via a belt speed reducer 41 having two pulleys 41a and a belt 41b stretched between the two pulleys 41a. be able to. For example, you may connect in series with the drive shaft of the hydraulic pump 2 via a coupling.

  Further, since the power supply system 8 has the battery 23 dedicated to the crane for mounting on the vehicle, the fluctuation of voltage and the like are suppressed and the power source is stabilized. That is, it is possible to make a system in which the power generated by the generator 7 can be directly supplied to the controller 4 (the crane body 6) through the regulator 20 and the PTO connection detection switch 50 at the same time when the PTO connection detection switch 50 is turned on. .

DESCRIPTION OF SYMBOLS 1 Engine 2 Hydraulic pump 3 Control valve 4 Controller 6 Crane main body 7 Generator 8 Power supply system 9 Charger 10 Vehicle 11 Driver's cab 12 Column 13 Boom 14 Wire rope 15 Hook 16 Loading platform 17 Base 18 Outrigger 19 Chassis frame 20 Regulator 23 Battery 27 Main line 28 Tank 29 Return line 38 Power line 40 Gear reducer 41 Belt reducer 50 PTO connection detection switch 51 Plunger 94 PTO operation knob

Claims (4)

A power supply system for a vehicle-mounted crane mounted on a vehicle,
The vehicle-mounted crane includes only a hydraulic pump that uses a vehicle engine as a power source as a hydraulic pump for driving the crane body,
A generator that is arranged to operate via a PTO connected to the engine and that generates power only by the output of the engine, and that receives the supply of electric power generated by the generator to operate the crane body. a controller for controlling, a vehicle mounted crane dedicated battery charged by the generator,
A battery dedicated to the vehicle-mounted crane is connected to the controller via a switch that is linked to on-off of the PTO, and when the switch is on, the battery on the vehicle side and the PTO switch are connected. without the power supply system for a vehicle for mounting a crane, wherein the controller is supplied with electric power to the controller is adapted to start. The generator, with respect to the PTO, the vehicle mounted cranes power supply system according to claim 1, characterized in that via a reduction gear is connected in parallel with the hydraulic pump. The generator, with respect to the PTO, the vehicle mounted cranes power supply system according to claim 1, characterized in that through a belt reduction gear is connected in parallel with the hydraulic pump. The generator, with respect to the PTO, the vehicle power supply system mounted crane according to claim 1, characterized in that connected in series to the hydraulic pump.

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