KR100493359B1 - Drive linkage for heavy equipment - Google Patents

Abstract

It replaces the configuration of the driving device and the driving linkage device installed in heavy equipment, ship, aircraft using hydraulic / pneumatic device with the electric device to reduce the responsiveness of the driving pedal and reduce the number of related parts installed.

According to a preferred embodiment, the engine includes a driving motor driven by the hydraulic oil discharged from the hydraulic pump interlocked with the engine, and a control valve for controlling the flow direction of the hydraulic oil supplied from the hydraulic pump to the driving motor. A traveling interlock device for heavy equipment, comprising: a driving pedal for generating an electrical signal according to a driver's operation displacement; a controller connected to the driving pedal and detecting an electrical signal generated when the driving pedal is operated; and a throttle lever of the engine. A variable first solenoid valve which is installed to rotate within a predetermined stroke and controls the output amount of the engine by rotating the throttle lever in accordance with a signal output from the controller to correspond to an operation displacement of the traveling pedal; Is installed in the, corresponding to the amount of operation displacement of the running pedal In accordance with the signal outputted from the controller and it provides the driving heavy equipment linkage, characterized by configured by comprising a variable second solenoid valve for controlling the amount of working oil supplied to the traveling motor.

This reduces the driver's fatigue by reducing the driving pedal's responsiveness by replacing the configuration of the driving device and the driving linkage device mounted on heavy equipment using hydraulic / pneumatic parts with electrical devices, and reducing the cost of the equipment by reducing the number of parts to be installed. In addition, the internal space may be usefully used, and the pedaling power of the driving pedal may be adjusted according to a user's habit and body type to provide comfort during driving.

Description

Drive linkage for heavy equipment

The present invention relates to a traveling linkage device for heavy equipment, and more particularly, to replace the configuration of the traveling device and the driving linkage device mounted on heavy equipment, ships, aircraft, etc. using the hydraulic / pneumatic to reduce the pedaling of the driving pedal, It relates to a drive linkage for heavy equipment that can reduce the number of associated parts to be mounted.

As shown in FIG. 1, the structure of a traveling linkage for heavy equipment according to the prior art includes an engine 1, a first hydraulic pump 2 connected to and driven by the engine 1, and a second hydraulic pump for pilot. (3), the traveling motor 4 connected to the above-mentioned first hydraulic pump 2 and rotating in the left or right direction by the supply of hydraulic oil, the traveling pedal 6, and the above-mentioned first hydraulic pump 2 And a main control valve (MCV) 5 installed between the driving motor 4 and controlling the start, stop and direction change of the driving motor 4 by driving according to the driving pedal 6 operation signals. And a pedal valve 7 for controlling the pilot signal pressure discharged from the second hydraulic pump 3 described above by the above-described driving pedal 6, and between the pedal valve 7 and the main control valve 5. It is installed and interlocked with the above-mentioned driving pedal (6) operation to control the pilot signal pressure supplied to the above-mentioned main control valve (5) before and after the equipment Linkage for controlling the throttle lever (10) of the engine (1) and the forward and backward valve (8) to determine the forward direction, the linkage is installed to be interlocked during the operation of the above-described driving pedal (6) and the mechanical link movement ( 9) is configured.

At this time, the above-described linkage 9 is a link (9a) that is rotatably fixed to the above-described running pedal (6) within a predetermined angle range, one side is connected to the link (9a) described above, the other side described above the throttle lever And a push / pull cable 9b which is connected to 10 and moved within a predetermined stroke.

Reference numeral 11 is a relief valve that protects the circuit components from damage by draining them to the tank when an overload occurs above a predetermined operating pressure inside the hydraulic circuit.

The traveling linkage device for heavy equipment according to the prior art configured as described above, the link (9a) of the above-mentioned linkage 9 connected to be interlocked by operating the above-described driving pedal (6) is rotated within a predetermined angle range, Due to the positional movement of the push / pull cable 9b connected to the link 9a described above, the throttle lever 10 of the engine 1 described above is rotated within a predetermined stroke to control the output of the engine 1 described above. do.

At the same time, the internal spool of the pedal valve 7 to be interlocked by operating the above-described driving pedal 6 is switched downward in the drawing, and thus pilot signal pressure discharged from the second hydraulic pump 3 described above. It is applied to the above-mentioned main control valve 5 via the above-mentioned pedal switch 7 and forward / rearward valve 8 which switch position, and switches an internal splice to the upper side or the lower side in a figure. Therefore, the hydraulic oil discharged from the above-described first hydraulic pump 2 is supplied to the above-described traveling motor 4 via the position-controlled main control valve 5 and rotated in the left or right direction, so that the equipment travels. You can do it.

However, as the link 9a and the push / pull cable 9b constituting the above-mentioned linkage 9 are mechanically connected between the traveling pedal 6 and the throttle lever 10 to be interlocked within a predetermined stroke. In addition, the driver can easily feel fatigue due to high responsiveness when operating the above-described driving pedal 6, and the cost cost is increased due to the increase in the number of parts constituting the linkage 9, as well as the internal space. There is a problem that can not be widely utilized.

Accordingly, an object of the present invention is to replace the configuration of the traveling device and the driving linkage device mounted on heavy equipment, such as using hydraulic / pneumatic with an electrical device to reduce the pedaling power of the driving pedal to reduce the fatigue of the driver, and to reduce the number of related parts to be mounted It is to provide a driving linkage for heavy equipment that reduces the cost and lowers the cost.

Another object of the present invention is to provide a traveling linkage device for heavy equipment that can provide comfort when driving by adjusting the pedaling force of the driving pedal according to a user's habit and body type.

An object of the present invention described above is a control valve for controlling a flow direction of a driving motor driven by an engine, hydraulic oil discharged from a hydraulic pump interlocked with the engine, and a hydraulic oil supplied from the hydraulic pump to the driving motor. A traveling linkage device for heavy equipment, comprising: a driving pedal for generating an electrical signal according to a driver's operation displacement, a controller connected to the driving pedal and detecting an electrical signal generated according to a driving pedal operation displacement amount; A variable first solenoid valve which is installed to rotate the throttle lever within a predetermined stroke and controls the output amount of the engine by rotating the throttle lever in accordance with an electrical signal output from the controller to correspond to an operation displacement of the traveling pedal. And, installed in the control valve, the operation displacement amount of the running pedal Response to be in accordance with the signal output from the controller is achieved by providing a driving heavy equipment linkage, characterized by configured by comprising a variable second solenoid valve for controlling the amount of working oil supplied to the traveling motor.

According to a preferred embodiment, the traveling pedal is provided with a permanent magnetic body integrally fixed to the bottom of the traveling pedal, and is mounted to receive the permanent magnetic body at a predetermined position of the vehicle body, and the current by the magnetic field when the permanent magnetic body is inserted by the traveling pedal operation. The coil forming the coil is configured to include a core wound on the inner surface, and outputs a predetermined electrical signal by the permanent magnetic material and the coil during the driving pedal operation.

According to a preferred embodiment, the switch is connected to the on / off, the cruise switch for turning on when the driving pedal is set to a predetermined angle to input a predetermined electrical signal according to the operation displacement amount of the driving pedal to the controller By setting the driving pedal from the controller at a predetermined angle, the electrical signal at the time of the ON operation of the switch for the cruise outputs to the variable first solenoid valve and the variable second solenoid valve to the control valve and the throttle lever position By keeping it constant, the driving speed is kept constant.

According to a preferred embodiment, it is further provided with an elastic member for stepping force adjustment is mounted between the bottom of the running pedal and the vehicle body can adjust the stepping degree of the running pedal according to the user.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are not intended to limit the technical scope of the present invention.

Figure 2 is a schematic diagram of a traveling linkage for heavy equipment according to an embodiment of the present invention, Figure 3 is a detailed view of the driving pedal shown in FIG.

As shown in Figures 2 and 3, the interlock control device for heavy equipment to which the present invention is applied is driven by the operating oil discharged from the engine 1 and the hydraulic pump (2) interlocked when the engine 1 is driven. And a main control valve 5 for controlling the flow direction of the hydraulic oil supplied from the above-mentioned hydraulic pump 2 to the above-mentioned traveling motor 4, and the vehicle body can be rotated within a predetermined angle range. It is fixed so that the configuration having a driving pedal (6) for opening and closing the pilot signal pressure for driving the above-mentioned main control valve (5) is applied in the same way as shown in Figure 1 will not be described in detail description thereof The duplicate quotation marks are the same.

Therefore, according to a preferred embodiment of the present invention, the permanent magnetic body 12 is integrally fixed to the bottom of the above-described driving pedal 6, and a current generated by the magnetic field is generated when the permanent magnetic body 12 is inserted into the vehicle body at a predetermined position. The core 13 is wound around the coil 14 so as to be mounted therebetween, and an elastic member capable of adjusting the stepping force of the aforementioned driving pedal 6 according to a user between the bottom of the traveling pedal 6 and the vehicle body ( 15) is installed.

The amplifier 16 which detects and amplifies changes in current caused by the magnetic field generated when the driving pedal 6 is pressed on the core 13 and converts the current detected by the aforementioned amplifier 16 into an electrical signal. The controller 17 is connected to the main control valve (5) is driven in accordance with the electrical signal output from the above-described controller 17 according to the above-described operation displacement amount of the driving pedal (6) (main control valve 5) A variable first solenoid valve 18 for controlling the operating flow rate supplied to the above-mentioned traveling motor 4 by the spool adjustment of 5) is provided. The output amount of the engine 1 described above is adjusted by adjusting the throttle lever 10 rotation amount of the engine 1 described above according to the signal output from the controller 17 described above to correspond to the operation displacement amount of the above-described running pedal 6. A variable second solenoid valve 19 for controlling the pressure is provided to rotate the throttle lever 10 of the engine 1 described above within a predetermined stroke.

When the above-described traveling pedal 6 is set at a predetermined angle in order to keep the traveling speed constant, the above-mentioned variable first solenoid valve 18 is operated according to a predetermined signal input to the controller 17 when the above-described traveling pedal 6 is turned on. And a predetermined electrical signal to the controller 17 to output the electrical signal to the variable second solenoid valve 19 to maintain the above-described main control valve 5 and the throttle lever 10 position. The cruise switch 20 to be input is connected to the controller 17 described above so as to be turned on / off.

Referring to the method of using the driving linkage for heavy equipment according to an embodiment of the present invention configured as described above are as follows.

When the driver presses the driving pedal 6 to a predetermined pressure by the driver, the permanent magnetic body 12 mounted on the bottom of the driving pedal 6 is inserted into the core 13 mounted on the vehicle body. The current change by the magnetic field that is changed between the permanent magnet 12 and the coil 14 wound inside the core 13 is amplified by the aforementioned amplifier 16 and then input to the controller 17 described above. . Therefore, the controller 17 applies the electrical signal according to the displacement amount of the driving pedal 6 to the aforementioned variable second solenoid valve 19 rotatably installed in the engine 1 within a predetermined angle range. In this way, by rotating the throttle lever 10 of the engine 1 described above, it is possible to control the output of the engine 1 described above.

At the same time, the above-described controller 17 applies an electric signal corresponding to the above-described displacement amount of the traveling pedal 6 to the variable first solenoid valve 18 provided in the above-described main control valve 5, By adjusting the amount of spool opening of the main control valve 5 described above, the flow rate supplied to the driving motor 4 described above can be adjusted.

On the other hand, when the above-described cruise switch 20 is ON in a state in which the above-described driving pedal 6 is pressed at a predetermined angle in order to keep the traveling speed constant according to working conditions, The electrical signal according to the operation of the switch 20 is input to the above-described controller 17, whereby the above-described controller 17 detects the current value according to the on-operation of the above-described cruise switch 20, and then The first variable solenoid valve 18 installed in the main control valve 5 and the first engine 1 apply a predetermined electrical signal to the variable second solenoid valve 19 connected to the throttle lever 10. Thus, the above-described internal control of the main control valve 5 and the position of the throttle lever 10 of the engine 1 are kept constant. Therefore, the machine can maintain a constant driving speed.

As described above, according to a preferred embodiment, by replacing the configuration of the traveling device and the driving linkage device mounted on the heavy equipment, such as using hydraulic / pneumatic with an electrical device to reduce the pedaling of the driving pedal to reduce the fatigue of the driver, the associated By reducing the number of parts to lower the cost cost, to utilize the internal space usefully, it also has the advantage to provide comfort while driving by adjusting the pedal power of the driving pedal according to the user's habits and body type.

1 is a schematic diagram of a traveling linkage for heavy equipment according to the prior art,

2 is a schematic diagram of a traveling interlock device for heavy equipment according to an embodiment of the present invention,

3 is a detailed view of the driving pedal shown in FIG. 2.

* Explanation of symbols used in the main part of the drawing

1: engine

2: hydraulic pump

4: driving motor

5: main control valve

6: running pedal

10: Throttle Valve

16: amplifier

17: controller

18: Variable First Solenoid Valve

19: variable second solenoid valve

20: cruise switch

Claims (4)

Traveling interlock device for the heavy equipment including an engine, a driving motor driven by the hydraulic oil discharged from the hydraulic pump linked to the engine driving, and a control valve for controlling the flow direction of the hydraulic oil supplied from the hydraulic pump to the traveling motor In: A driving pedal generating an electrical signal according to a driver's manipulation displacement; A controller connected to the driving pedal and detecting an electrical signal generated according to a driving pedal operation displacement amount; A first variable type installed to rotate the throttle lever of the engine within a predetermined stroke and controlling the output amount of the engine by rotating the throttle lever according to an electrical signal output from the controller to correspond to an operation displacement of the running pedal; Solenoid valves; And And a variable second solenoid valve installed on the control valve and configured to control an operating flow rate supplied to the traveling motor according to a signal output from the controller in response to an operation displacement of the traveling pedal. Drive linkage. According to claim 1, wherein the running pedal; A permanent magnetic body integrally fixed to the running pedal bottom surface; And The permanent magnet is mounted to receive the permanent magnetic material at a predetermined position of the vehicle body, and includes a core wound around an inner surface of the driving pedal to form a current caused by a magnetic field when the permanent magnetic material is inserted. The driving interlock device for heavy equipment, characterized in that for outputting a predetermined electrical signal by the magnetic material and the coil. The cruise control apparatus of claim 1, wherein the cruise controller is connected to the controller to be turned on and off, and is turned on when the driving pedal is set at a predetermined angle to input a predetermined electrical signal corresponding to the set angle of the driving pedal to the controller. And a switch for controlling the control valve and the throttle by outputting an electrical signal to the variable first solenoid valve and the variable second solenoid valve when the cruise pedal is set at a predetermined angle from the controller. A driving interlock device for heavy equipment, characterized by maintaining a constant position of the lever to maintain a constant driving speed. The apparatus of claim 1, further comprising an elastic member for stepping force adjustment, which is mounted between the bottom of the driving pedal and the vehicle body and adjusts the degree of pedaling of the driving pedal according to a user.