KR20080079023A - Rpm control and outrigger control system for electronic engine of crane vehicle using the multiplex accelerator - Google Patents

Abstract

An RPM control and outrigger control system for an electronic engine of a crane vehicle using a multiplex accelerator is provided to control engine RPM variably by using an accelerating signal selector and an accelerating dial. In an RPM control and outrigger control system for an electronic engine of a crane vehicle using a multiplex accelerator, periphery devices controls transmission of the electronic engine, when switching to a PTO(Power Take Off) control mode. The multiplex accelerator performs change over at the electronic engine by selecting signals of accelerator pedals(137) installed at a lower cabin, signals of an accelerator pedal(139) installed at an upper cabin, and signals of accelerator dial(59,71) of an outrigger controller(143,142) as RPM control signals for the electronic engine ECU(Electric Control Unit). The multiplex accelerator controls a horizontal beam of the outrigger and movement distance and speed of a vertical jack, and outputs drive signals for a control valve of an outrigger operation cylinder by using the accelerator dial. The multiplex accelerator limits operation of the outrigger, and carrying out boom interlock function for a crane work mode and safety control function by using proximity sensor signals.

Description

RPM Control and Outrigger Control System for Electronic Engine of Crane Vehicle Using the Multiplex Accelerator

1 is a functional diagram of an outrigger control panel of a hydraulic crane vehicle according to the prior art.

2 is a functional block diagram of an engine RPM control and outrigger control system of a crane vehicle using multiple accelerators according to the present invention.

Figure 2 (a) is a control flow diagram of the engine RPM control and outrigger control system of the crane vehicle using multiple accelerators in accordance with the present invention in Figure 2;

Figure 2 (b) is a control panel of the outrigger controller in Figure 2, using the accelerator according to the present invention.

3 is a front view of a hydraulic crane vehicle showing an embodiment of an engine RPM control and outrigger control system using multiple accelerators according to the present invention.

Figure 4 is a side view of a hydraulic crane vehicle showing an embodiment of the engine RPM control and outrigger control system using multiple accelerators according to the present invention.

The present invention relates to an electronic engine RPM (Revolutions Per Minute) control and outrigger control system as a hydraulic crane vehicle or a special purpose vehicle.

In detail, in the conventional crane, the engine RPM control uses an accelerator pedal, which is an accelerator device in the lower cabin and the upper cabin, and uses a push-pull cable by connecting a dual link structure to the engine governor lever to accelerate the engine. By changing the angle of the engine governor lever by the amount of movement of the cable from the lower part or the upper part, and by controlling the governor lever by pulling it at an angle using an electric solenoid, or stepping to precisely control the engine RPM. A rotating lever was attached to the shaft of the motor, and a link structure was used to connect the engine governor lever to the rotating lever, thereby enabling linear proportional control of the engine speed.

In addition, in the conventional crane, the outrigger control device simply uses a mechanical lever attached to a hydraulic ON / OFF valve block installed on the left and right sides of the vehicle to control the horizontal beam or the vertical jack of the outrigger. The expansion and contraction of the spool of cylinder control valve was operated mechanically.

 The conventional outrigger control system has a work changeover mode, that is, a mode in which power of the engine is connected to drive a pump for a work device when switching to PTO (POWER TAKE OFF) mode. At this time, the engine RPM is limited or the outrigger control device is operated while maintaining a constant rotation speed.

Conventional embodiments have been devised to operate the horizontal beam or the vertical jack of the outrigger by operating the toggle switch installed by the position of the outer trigger control solenoid electrically by using the electrical control panel shown in FIG.

The outrigger control panel of FIG. 1 adopts an entirely electrical method so that the five switches 1 to 5 on the left control four horizontal beams when the power switch 11 is turned on. The switch 6 ~ 10 controls the four vertical jacks so that the switch can be arranged by the position of the work equipment.

More specifically, when the switch 1 is operated left or right to expand (OUT) or contract (IN) the horizontal beam 167 on the front right side, a driving signal is directly transmitted to the solenoid of the corresponding outrigger cylinder. to be.

Then, when the all-beam switch (OVERALL, 5) is operated to the left and right sides, all four horizontal beams are designed to expand (OUT) or contract (IN) at the same time. It is designed to operate the outrigger unit by position using the remaining operating switches.

The same concept is designed to land the jacks on the ground by position using the five vertical jack switches on the right.

The control system has a disadvantage in that the mechanical system is complicated and the weight of the vehicle is increased, and the engine RPM works in a constant state, or in a limited engine RPM control situation, the work efficiency decreases or the work time is long. to be.

The present invention has been devised as shown in Figure 2 by applying an electronic engine to solve the above problems, the present invention is a crane vehicle due to its own characteristics of the electronic engine and the functional characteristics of the operation of the general crane lower cabin Engine RPM control accelerator pedals 137 and 139 are attached to the 135 and upper cabin 138, respectively, and a plurality of accelerators (acceleration dials 71 and 59) are attached to the outrigger controllers 143 and 142 attached to the left and right sides of the vehicle. It is designed for hydraulic truck crane with hydraulic engine, hydraulic cargo crane and hydraulic aerial fire truck. It is applied to control RPM of electronic engine according to working mode (lower, upper, and outrigger). By using the acceleration signal selector 148 and the acceleration dials 71 and 59 for selecting the signals of the accelerator pedals 137 and 139, the engine RPM (speed) is variably controlled, and the outer Virtually moving distance, to a outrigger controller (143 142) of the crane vehicle to appropriately control the speed.

When switching to the PTO mode in a crane vehicle, the peripheral pedal for controlling the power transmission of the electronic engine, the accelerator pedal signal mounted on the lower cabin, and the accelerator pedal signal or acceleration dial installed on the upper cabin ( An accelerator signal selector 148 and an acceleration device (acceleration dial, acceleration pedal) for selecting an accelerator dial signal as an RPM control signal of an electronic engine ECU (Electronic Control Unit) to change over the electronic engine ECU. Control the outrigger's horizontal beam and vertical jack's moving distance and speed, output the control valve drive signal of the outrigger's operation cylinder, analyze the outrigger's operation state using hydraulic control valve logic signal, and work on the crane. For hydraulic crane vehicles with multiple accelerators with boom interlock and safety control It relates to an engine RPM control and the outrigger control system.

The crane vehicle is largely classified into a self-propelled vehicle body 166 composed of wheels for high-speed driving, a lower bearing 135 that is mounted on the self-propelled vehicle body, and a swing bearing device that is mounted on the self-propelled vehicle body 166 and supports rotation. (170), the main hook (173) and the one-wheel drum 172 for lifting work, the multi-stage boom 163 for the aerial work is connected to the turntable 171 and turn to support the ups and downs, expansion and rotation of the upper structure A multi-stage boom 163 and a boom take-out cylinder (not shown) mounted on a table for moving the upper cabin 138, the main hook 173, which is in charge of the upper crane work, vertically and horizontally to the working position, and boom ups and downs. It consists of the cylinder 174.

Outrigger (body support, 144,145) is operated by hydraulic cylinder with expansion and contraction function, installed in 'H' type on both front and rear part of the body and safety check valve that can fix the outrigger in case of hydraulic system error. This device is installed. And the outrigger controller 143 is installed on the left side of the vehicle body, the acceleration signal selector 148 and the right outrigger controller 142 is installed on the right side has a feature that can work from side to side.

When the vertical jack is in contact with the ground, horizontal (front, rear, left, right) state is easily installed so that the level gauge 175 is installed, and the footrest is hinged (universal, 176) type so that the level can be maintained even at an inclined place. Should be.

 An embodiment will be described using the functional block diagrams, control flow diagrams, panel functional diagrams, and FIG. 3 of FIGS. 2 and 2 (a) and 2 (b). The control flow diagram of FIG. 2 (a) shows an operation mode in an actual vehicle. When the operator turns on the engine start 39 in the lower cabin 135 and drives the vehicle in driving mode 40 to move to the workplace, the RPM control of the engine is controlled by the lower axel pedal of the lower cabin 135 ( 137), and when the vehicle is parked, when the workers turn on the PTO switch 136 of the lower cabin 135 together in a state where the clutch pedal (not shown) is put together, the PTO mode (work mode, 43). In the PTO mode, the PTO enable signal 15 is input to the right outrigger controller 142 and the acceleration signal selector 148 simultaneously with the PTO power source 16 to the left / right outrigger controllers 143 and 142. The mode 46 is set and the electronic engine is driven at the reference idle speed by the upper accelerator pedal 139.

 The operator descends from the lower cabin and moves to the left outrigger controller 143 of the vehicle to turn on the axel switch 64 and switch to the outrigger mode 45, or to the upper mode (crane mode 46). do.

 The RPM LED lamp 67 lights when the outrigger mode is switched, and the RPM LED lamp 67 blinks when an error occurs in the serial communication 18 between the left outrigger controller 143 and the right outrigger controller 142. It is provided with a function.

In the simultaneous operation of the axel switches 64 and 73 in the outrigger mode 45, the priority is to select the left outrigger controller 143, operate in the outrigger LH mode 49, and operate the engine RPM and outrigger. Presides at the left outrigger controller 143. In addition, the engine RPM control and the outrigger operation when only the right axel switch 73 is turned on (ON) is characterized in that the enema in the right outrigger controller 142 of the vehicle body. In the outrigger LH mode 49, the function switch of the left outrigger control panel 60 of the crane vehicle is activated and the input information of the panel is transmitted to the right outrigger controller 142 using the serial communication 18. After analyzing the necessary data, the right outrigger controller 142 examines the state signal 27 in which the multi-stage boom is seated on the boom rest 146 through the boom proximity sensor 140 installed in the boom rest 146, Through the output port corresponding to the input information, the solenoids 30 to 35 of the outrigger operation cylinder and the axel signal 25 corresponding to the set RPM of the accelerator dial 71 are generated, and the outrigger selection signal 26 is generated. And outputs an idle RPM release signal 36 to control the acceleration signal selector 148 to switch to the outrigger LH mode 49, and from the right outrigger controller 142 to the electronic engine 29. Set RPM information is axel signal (25) To be delivered.

Therefore, it is possible to control the engine RPM 52 is provided with a feature to enable the left outrigger operation 54.

 The outriggers can operate four outriggers simultaneously with one toggle switch (located at the center of the panel, 66) and can be individually operated with the respective operation toggle switches 62, 63, 65, 69 and 70. Designed.

 For individual operation, first set the extension / retraction select toggle switch 61 in the UP direction, that is, select the outrigger's extension and select the horizontal beam / vertical jack select toggle switch 68 in the UP direction (horizontal beam selection). The horizontal beam of the front left outrigger (164 in FIG. 4) expands at an appropriate speed while the front left operation toggle switch 69 is kept ON.

At this time, by moving the position of the accelerator dial 71 to an appropriate step (10 steps on the basis of RPM) or adjusting the accelerator dial 71 when the operation toggle switch 69 is in operation, the engine RPM (rotation speed) is increased. Properly adjusted, the flow rate of the hydraulic pump is discharged in accordance with the increase in the number of revolutions, the operating speed of the hydraulic cylinder of the outrigger is increased.

When the horizontal beam 164 expansion of the front left outrigger is completed, selecting the selector switch 68 in the DOWN direction (vertical jack selection), and then operating the operation toggle switch 69 again, the front left outrigger vertical jack 165 is operated. This extends to the ground.

The RPM of the engine follows the set RPM steps of the accelerator dials (71, 59) only when the operation toggle switches (6) are ON, and in the OFF state, the RPM of the first stage of the accelerator dials (71, 59) The engine was driven at idle speed.

In addition, the outrigger operation is performed in the same manner as above using the rear left side operation toggle switch 70, and the outrigger right side operation is performed using the front right side operation toggle switch 62 and the rear right side operation toggle switch 63. do.

When the four outriggers are aligned in the 'H' type, the jack 141 of the front vertical jack 147 is finally extended to the ground.

First, set the extension / retraction selection toggle switch 61 in the UP direction, and set the horizontal beam / vertical jack selection toggle switch 68 in the DOWN direction (vertical jack selection) to operate the jack operation toggle switch 65. The solenoid 33 of the jack operation cylinder and the expansion / contraction solenoid (expansion valve 35 of the double valves) are operated simultaneously so that the jack 141 of the front vertical jack 147 is expanded according to the set engine RPM (set speed). Lose.

 When dismantling the extended outrigger device, the front vertical jacks 147 and 141 are first contracted, and the remaining four outriggers are contracted in the reverse order of the expansion operation and removed.

 When dismantling the outrigger device, remember the work priority logic so that the contraction work of the vertical jack can proceed first, judge the outrigger installation status using the output hydraulic control valve drive logic signal, and proceed with the vertical jack removal work first. The outrigger safety control function was implemented programmatically in the right outrigger controller 142 so as to perform a safe operation with a protection function.

There is also a toggle switch (OVERALL S / W, 66) for simultaneous operation to quickly install / dismantle four outriggers simultaneously, depending on the surrounding conditions. In order to quickly dismantle the four outrigger devices installed above at the same time, first set the expansion / retraction selection toggle switch 61 in the DOWN direction (shrink selection), and set the horizontal beam / vertical jack selection toggle switch 68 in the DOWN direction ( Vertical jack selection) and operating the toggle switch 66 for simultaneous operation in the UP direction with the accelerator dial 71 set to an appropriate step according to the working situation. And the solenoids of the four outrigger vertical jack cylinders (double valves, 30, 31, 32, 34) and the expansion / shrink solenoids (shrink valves of the double valves, 35) are operated at the same time. This will act as a contraction.

If the extension / retraction selection toggle switch 61 is set in the DOWN direction, the horizontal beam / vertical jack selection toggle switch 68 is set in the UP direction, and the simultaneous operation toggle switch 66 is operated in the UP direction. At the set engine RPM, the four outrigger horizontal beams are completely dismantled at the same time by contracting action.

For convenience, the left outrigger control panel 60 is described, but when the left axel switch 64 is turned off and the axel switch 73 of the right outrigger control panel 72 is turned on, the RPM LED lamp 58 is turned on and the outrigger is turned on. The trigger is set to the RH mode 53. The right outrigger control panel 72 is activated to enable the engine RPM control 55 and the right outrigger operation 56. The right outrigger controller 142 may be operated in the same manner and in the same manner as the left outrigger control panel 60 in the right outrigger installation operation.

The outrigger device is operated only when the multistage boom 163 is seated on the boom rest 146, and once the boom is activated, the auto interlock function is activated so that the outrigger cannot be operated even if the toggle switch for operating the outrigger is operated. 140 is implemented programmatically to limit the output of the control valve in the right outrigger controller 142.

When the left and right outriggers (54, 56) are finished, turning the left and right axel switches (64, 73) off will switch to the upper mode (crane mode, 46) and control the engine RPM by the upper axel pedal (139). 48) and the crane work 57 can be efficiently carried out.

When the crane work is completed, the engine is not lowered (58) and lowered down to complete the outrigger dismantling operation through the outrigger mode using any of the left and right axel switches (64, 73), the axel switch is turned off, and When the vehicle moves to the cabin, the PTO switch 136 is turned off, and the vehicle moves to the driving mode 40.

The acceleration signal selector 148 has three modes of operation by the PTO enable signal 15 in the PTO mode 43 and the outrigger selection signal 26 in which the right outrigger controller 142 is generated in the outrigger mode 45. (Driving, upper, outrigger), the signal of the selected accelerator (axel pedal or axel dial) and idle RPM release (or set) signal is transmitted to the electronic engine 29 in each operation mode. The lower axel pedal 137 is selected in the driving mode 40, the upper axel pedal 139 is selected in the upper mode 46, and the axel dial 71 of the left / right outrigger controller in the outrigger mode 45. , 59) is selected. And it has a mode diagnosis function for determining the change over status for each mode, it is provided with a function to operate the indicator lamp corresponding to the operation mode and easily check the operation status.

As described above, the present specification may have a plurality of embodiments according to the present invention with reference to the accompanying drawings as an engine RPM control and outrigger control system of a crane vehicle using multiple axels, and the above-described embodiment may be a hydraulic truck crane. Although the embodiment of the vehicle has been described, the scope of the present invention is not limited to the above description, and the change of the appearance of the accelerator device in the form of an acceleration lever or an acceleration handle other than an acceleration dial is not necessary. Can not be seen as. In addition, it can be equally applied to the electronic engine RPM control and outrigger control system applied to special purpose vehicles such as hydraulic cargo crane, fire truck.

 In addition, it should be understood that modifications, changes, additions to the present invention also fall within the scope of the present invention without departing from the basic spirit of the invention described in the claims.

The engine RPM control and outrigger control system of the crane using the multiple axels designed above simplifies the engine RPM control system using multiple axels by integrating electronic control technology, and installs an accelerator on the left and right sides of the upper / lower cabin and the vehicle body. In addition, by installing the outrigger controller on the left and right sides of the cabin and the vehicle body, it is effective to provide improved functions and performance by various workability and efficient work, convenience, shortening working time.

There is a technical effect of constructing a controller structure and a control system for a new engine RPM control device and a new outrigger control device for an electronic engine application according to the development of electronic technology.

Claims (4)

In a hydraulic crane vehicle, a swing bearing device that is mounted on a self-propelled vehicle body 166 consisting of wheels for high-speed driving, and a lower cabin 135 and a self-propelled vehicle body 166, which are mounted on the self-propelled vehicle body and responsible for driving the vehicle, and supports rotation. Turn table (swing post, 171) connected to the main hook (173) for the lifting work and the one-wheel drum (172) and the multi-stage boom (163) for the aerial work to support the ups and downs, expansion, and rotation of the superstructure Inside the multistage boom 163 and the multistage boom to move the main hook 173 vertically and horizontally to the working position, and the upper cabin 138 or the top seat which is mounted on the turntable and performs the upper crane work. A crane system consisting of a boom take-out cylinder and a boom relief cylinder 174, the body outriggers 144 and 145 are operated by hydraulic cylinders with expansion and contraction functions and are installed in 'H' on both the front and rear parts of the body. The lower cabin 135 and the upper cabin 138 of the vehicle are provided with axel pedals 137 and 139, respectively, and a left outrigger controller 143 is installed on the left side of the vehicle body and a right outrigger controller 142 on the right side. ) And an acceleration signal selector 148, and each outrigger controller is provided with an acceleration device (acceleration dials 59, 71), and the RPM control of the electronic engine is linear at the lower, upper, and left and right sides of the vehicle body. It is possible to control the expansion distance and the speed of the outrigger on the left and right sides of the vehicle body, and when the operator turns on the engine start 39 in the lower cabin 135 and runs in the driving mode 40 In order to accelerate the engine RPM control 41 of the engine using the lower axel pedal 137 of the lower cabin 135, while the vehicle is parked, the operator presses the clutch pedal of the PTO switch 136 of the lower cabin. ON together to switch to PTO mode 43 In the PTO mode, first, the upper mode 46 is set, and the electronic engine is driven at the reference idle speed (idle speed) by the upper axel pedal 139, and the operator descends from the lower cabin 135 to the left side of the vehicle body. Go to the outrigger controller 143, switch the axel switch 64 to the ON operating position, switch to the outrigger mode 45, or switch to the upper mode (crane mode 46), and to the outrigger mode RPM LED lamp 67 is turned on, the RPM LED lamp 67 has a function of blinking when an error occurs in the serial communication 18 between the left outrigger controller 143 and the right outrigger controller 142, In simultaneous operation of the axel switches 64 and 73 in the outrigger mode 45, the priority is that the left outrigger controller 143 is preferentially selected and operates in the outrigger LH mode 49, and the engine RPM control and out Trigger operation controls left outrigger 143, the left axel switch 64 is turned off, and the axel switch 73 of the right outrigger control panel 72 is turned on to turn on the RPM LED lamp 58 and the outrigger RH mode (53). When the right outrigger controller 142 is activated, the engine RPM control 55 and the right outrigger operation 56 are possible, and when the left and right outrigger operations 54 and 56 are finished, Turning off the left / right axel switches 64 and 73 switches to the upper mode (crane mode 46), enabling the engine RPM control 48 by the upper axel pedal 139 and efficiently operating the crane operation 57. When the crane work is completed, it goes down without stopping the engine (58) and completes the outrigger demolition work through the outrigger mode by using any of the left / right axel switches (64, 73), OFF, go to the lower cabin 135 and the PTO switch ( Engine RPM control and outrigger control system of a hydraulic crane vehicle using a multi-accelerator having a feature that the vehicle can move when the 136) is turned off and switched to the driving mode (40). The left and right outrigger controllers 143 and 142 are supplied with the PTO power supply 16 when the PTO mode is switched, the PTO enable signal 15 is applied to the right outrigger controller 142, and the left and right outrigger controllers 143 and 142 are applied. The serial communication 18 is applied between the trigger controllers to transmit the information of the left outrigger control panel 17 to the right outrigger controller 142, and the right outrigger controller refers to the signal of the boom proximity sensor 28 to the left. The position of the outrigger controller is judged according to the ON state of the axel switches 64 and 73 of the control panel panels 60 and 72 of the right outrigger controller 143 and 142, and the axel signal of the selected accelerator dials 59 and 71 25) and a hydraulic crane vehicle using multiple accelerators, which selectively outputs drive signals of the outrigger control solenoids 30 to 35 corresponding to the positions of the operation toggle switches of the selected control panel 60 and 72. Engine RP M control and outrigger control system. The acceleration signal selector 148 is an outrigger selection signal 26 in which the PTO enable signal 15 is generated in the PTO mode 43 and the right outrigger controller 142 is generated in the outrigger mode 45. It operates in three operation modes (driving, upper and outriggers), and the signal of the accelerator (axel pedal or axel dial) selected in each operation mode and the idle RPM cancellation (or setting) signal are transferred to the electronic engine 29. The lower axel pedal 137 is selected in the driving mode 40, the upper axel pedal 139 is selected in the upper mode 46, and the axel of the left / right outrigger controller is selected in the outrigger mode 45. One of the dials 71 and 59 is selected, and has a mode diagnosis function for determining change over status for each mode, and operates an indicator lamp corresponding to an operation mode, and operates an error lamp in an abnormal mode. Operation, easy operation Check the acceleration signal selector 148 maintains a readily characteristics of a multi-accelerators hydraulic crane vehicle in the engine RPM control and outrigger comprising a control system using a to the. 3. The vehicle according to claim 1 or 2, wherein the control arrangements of the control panels 60 and 72 of the left and right outrigger controllers 143 and 142 adopt the same configuration, and symbolize the meaning of the function of the switch in the center of the panel. Using the symbol, it is possible to recognize the position of the outrigger device (horizontal beam, vertical jack) that is activated when the function switch is activated.The outrigger device has one toggle switch (located at the center of the panel, 66). Four outriggers can be operated simultaneously, and individual outriggers can be operated with the respective operation toggle switch (62, 63, 65, 69, 70). 61) in the UP direction (expand selection), the horizontal beam / vertical jack select toggle switch 68 is selected in the UP direction (horizontal beam selection), and the front left operation toggle switch 69 is turned ON in the UP direction. Front left while holding When the horizontal beam 164 of the side outrigger extends at a set speed, and the position of the accelerator dial 71 is set at an appropriate step (10 steps on the basis of RPM), or when the operation toggle switch 69 is operating, the accelerator dial By adjusting (71), the engine RPM (rpm) is properly adjusted, and the flow rate of the hydraulic pump is discharged in accordance with the increase in the engine speed, so that the operating speed of the hydraulic cylinder of the outrigger is increased. When the horizontal beam 164 of the left outrigger is extended and the selector switch 68 is selected in the DOWN direction (vertical jack selection) and then the operation toggle switch 69 is operated again, the front left outrigger vertical jack 165 is activated. When dismantling the outrigger unit, which extends to the ground and reversely, the front vertical jack 141 is first retracted, and when the other four outrigger units are dismantled, the vertical jack retracts first. It memorizes the work priority logic, judges the outrigger installation state by using the output logic signal of the outrigger control valve output, and has the protection function to proceed the removal of the vertical jack first. The outrigger safety control function is implemented programmatically in the trigger controller 142, and the outrigger device must be seated on the boom rest 146 when the multistage boom 163 is seated on the boom rest 146 to prevent the equipment from tipping over during the outrigger installation / demolition work. Once the boom is activated, the automatic interlock function is activated using the boom proximity sensor 140 to control the logic at the right outrigger controller 142 so that the outrigger cannot be operated even if the operation toggle switch of the outrigger control panel is operated. An outrigger control system for a hydraulic crane vehicle, characterized in that implemented programmatically.

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