KR20160083402A - Construction Heavy Equipments having Safty Function - Google Patents

Abstract

The present invention relates to a construction apparatus including a safety function. The construction apparatus includes: a control unit which is controlled by an operator to operate the construction apparatus; a main control valve controlling an arm cylinder which is driven by receiving a signal from the control unit and drives an arm connected to a bucket; a signal transmission unit which is installed between the control unit and the main control valve and transmits the signal of the control unit to the main control valve; a control unit which is installed to be connected to the signal transmission unit and controls the operation of the signal transmission unit; and a sensor unit which is installed to be connected to the control unit and between the arm and a boom rotatably coupled to the arm to measure the distance between the arm and the boom. When the distance measured by the sensor unit is equal to or less than a preset reference distance, the control unit stops an operation of the signal transmission unit to block the signal of the control unit from being transmitted to the main control valve.

Description

{Construction Heavy Equipments Having Safty Function}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a construction equipment to which a safety function for preventing interference of a working device is added.

Generally, construction equipments such as excavators perform various tasks such as excavation work for digging or filling ground in construction and civil works, breaker work such as ground rock breakage, compaction work such as soil compaction, and crusher work such as cutting .

The construction of such a construction equipment includes a hydraulic pump driven by an engine, an actuator such as a hydraulic motor and a hydraulic cylinder that is operated by discharge oil of the hydraulic pump and drives the equipment, A main control valve installed between the hydraulic pump and the actuator for performing start, stop and direction switching of the actuator, and an RCV (Remotely Controlled Vehicle) for controlling the construction equipment .

On the other hand, in construction equipment, an engine such as a diesel engine is mounted in order to obtain a hydraulic driving force of a traveling and working device. The hydraulic pump is driven by the power of the engine, and hydraulic oil discharged from the hydraulic pump is supplied to a hydraulic motor And is supplied to an actuator such as a hydraulic cylinder so as to rotate the traveling crawler or the tire or to operate each working device such as a boom, an arm and a bucket.

Here, the construction equipment according to the prior art may be required to use a large bucket having a large capacity depending on the working environment such as an emergency in which a large rock is lifted or an earthquake is urgently needed. In this case, since it is impossible to change the link structure of the construction equipment itself, the load applied to the arm cylinder driving the arm and the boom cylinder driving the boom is increased. Accordingly, the construction equipment according to the prior art reduces the load applied to the arm cylinder and the boom cylinder by reducing the load of the arm by reducing the length of the arm. However, the construction equipment according to the related art has a problem that a large bucket having a large capacity is mounted and a large bucket collides with the inside of the boom during operation as the length of the arm is shortened. Accordingly, the construction equipment according to the prior art has a problem that the bucket or the boom is damaged or broken when the large bucket is mounted, and the operator must always pay attention to the operation while driving.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a construction equipment to which a safety function capable of preventing interference even when a large work device is mounted.

In order to solve the above-described problems, the present invention can include the following configuration.

The construction equipment to which the safety function according to the present invention is added includes an operation unit operated by an operator to operate the construction equipment; A main control valve for controlling an arm cylinder which operates by receiving a signal of the operating portion and drives an arm to which a bucket is connected; A signal transmission unit installed between the operation unit and the main control valve and transmitting a signal of the operation unit to the main control valve; A control unit connected to the signal transfer unit and controlling operation of the signal transfer unit; And a sensor installed between the arm and the boom to be rotatably coupled to the arm and measuring a distance between the arm and the boom. The control unit may stop the operation of the signal transmission unit so that the signal of the operation unit transmitted to the main control valve is blocked when the distance measured by the sensor unit is less than a predetermined reference distance.

In the construction equipment with the safety function according to the present invention, the sensor unit may be a magnetic pick-up sensor.

In the construction equipment with the safety function according to the present invention, the sensor unit may be an angle sensor.

In the construction equipment with the safety function according to the present invention, the control unit may control the signal transfer unit only during an arm-in operation in which the distance between the arm and the boom approaches.

The construction equipment with the safety function according to the present invention may include a sensor operation unit for operating the sensor unit. The sensor operation unit may operate the sensor unit if it is manually operated by an operator according to a work environment.

According to the present invention, the following effects can be obtained.

The present invention can be implemented to prevent interference even when a large working device is mounted, thereby preventing damage or breakage of the working device, thereby contributing to improvement in the durability life, as well as reducing the fatigue of the worker .

1 is a block diagram showing a construction equipment to which a safety function according to the present invention is added
2 is a schematic view showing an operating state of a construction equipment with a safety function according to the present invention;
3 is a block diagram for explaining a sensor operation unit in a construction equipment to which a safety function according to the present invention is added

It should be noted that, in the specification of the present invention, the same reference numerals as in the drawings denote the same elements, but they are numbered as much as possible even if they are shown in different drawings.

Meanwhile, the meaning of the terms described in the present specification should be understood as follows.

The word " first, "" second," and the like, used to distinguish one element from another, are to be understood to include plural representations unless the context clearly dictates otherwise. The scope of the right should not be limited by these terms.

It should be understood that the terms "comprises" or "having" does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "at least one of the first item, the second item and the third item" means not only the first item, the second item or the third item, but also the second item and the second item among the first item, Means any combination of items that can be presented from more than one.

Hereinafter, a construction equipment to which a safety function according to the present invention is added will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing a construction equipment to which a safety function according to the present invention is added, FIG. 2 is a schematic diagram showing an operation state of a construction equipment to which a safety function according to the present invention is applied, FIG. Fig. 6 is a block diagram for explaining a sensor operation part in the construction equipment added; Fig.

1 and 2, a construction equipment 100 to which a safety function according to the present invention is applied includes a work device such as a boom, an arm, and a bucket of a construction equipment such as an excavator To prevent them from interfering with each other. In particular, when the large-sized bucket is mounted on the arm, the construction equipment 100 with the safety function according to the present invention prevents the distance between the arm and the boom from being narrowed below a predetermined reference distance, As shown in FIG.

To this end, the construction equipment 100 to which the safety function according to the present invention is added includes an operation unit 110 operated by an operator to operate the construction equipment, a control unit for controlling the arm cylinder for driving the arm by receiving the signal of the operation unit A control unit 140 for controlling the operation of the signal transfer unit, and a control unit 140 for controlling the operation of the signal transfer unit 130, And a sensor unit 150 installed between the coupled booms and measuring the distance between the arm and the boom. The control unit 140 may stop the operation of the signal transmitting unit so that the signal of the operation unit transmitted to the main control valve is blocked when the distance measured by the sensor unit is less than a predetermined reference distance.

The operation unit 110 is a lever for operating the construction equipment. For example, the operation unit 110 may be a remotely controlled vehicle (RCV) for operating each work device such as a boom, an arm, and a bucket of an excavator. The main control valve 120 receives a signal from the operation unit 110 to supply and discharge a working fluid such as oil and the like to and from a boom cylinder for driving the arm cylinder and the boom, . The signal transfer unit 130 may be installed between the operation unit 110 and the main control valve 120 and may transmit an operation signal of the operation unit 110 to the main control valve 120. The control unit 140 may be provided between the signal transfer unit 130 and the sensor unit 150 so that the distance measured by the sensor unit 150 is less than a predetermined reference distance. Stop operation. Accordingly, the distance between the arm 200 and the boom 300 is not narrowed any more. The predetermined reference distance may be previously set in the controller 140 by an operator. The sensor unit 150 may be installed on the boom 300 to measure the distance of the arm 200. The sensor unit 150 may be mounted on the arm 200 to measure the distance to the boom 300. For example, the sensor unit 150 may be a proximity sensor. Accordingly, the construction equipment 100 with the safety function according to the present invention can achieve the following operational effects.

First, when a large bucket is mounted on the arm 200, the construction equipment 100 with the safety function according to the present invention narrows the distance between the arm 200 and the boom 300 to be less than a reference distance It is possible to prevent the large bucket from colliding with the boom 300 by installing the sensor so as not to support the boom. Accordingly, the construction equipment 100 with the safety function according to the present invention can prevent damage or breakage of at least one of the bucket, the arm 200, and the boom 300, Thereby reducing the cost incurred by the user.

Second, the construction equipment 100 to which the safety function according to the present invention is added is automatically prevented from interfering with each other among the working apparatuses, so that the operator does not have to always pay attention during operation. Accordingly, the construction equipment 100 to which the safety function according to the present invention is added can reduce the work time of the worker by reducing the fatigue to the worker, thereby preventing the construction work from being delayed.

Hereinafter, the operation unit 110, the main control valve 120, the signal transfer unit 130, the control unit 140, and the sensor unit 150 will be described in detail with reference to the accompanying drawings.

1 and 2, the operation unit 110 is a part for operating a construction equipment such as an excavator and operated by an operator. It is a type of input device in the form of a lever that is formed in the form of a joystick and adjusted in the up, down, left, and right directions. At this time, signals may be divided and transmitted stepwise according to the operation amount when the operation unit 110 is adjusted. By implementing such a signal step by step, the operator can finely adjust the desired input value. The worker may also perform an arm in operation D1 to adjust the arm 200 closer to the boom 300 and an arm out operation to move the arm 200 away from the boom 300. [ , D2) can be operated by using the operation unit 110. [ A signal of the operation unit 110 may be transmitted to the main control valve 120 through the signal transfer unit 130.

Referring to FIG. 1, the main control valve 120 controls an arm cylinder that operates by receiving a signal from the operation unit 110 and drives an arm to which a bucket is connected. The bucket is a bucket-type bucket that performs a compacting operation such as excavating the ground or filling the soil, compaction of the soil, and the like, and is rotatably coupled to the arm 200. The main control valve 120 is connected to a hydraulic device (not shown) for applying pressure to a working fluid such as oil. The main control valve 120 receives a signal from the control unit 110 and controls a moving direction in which a working fluid (hereinafter referred to as "pressure oil") supplied by the hydraulic pressure unit is supplied to the arm cylinder. For example, the main control valve 120 may move the arm 200 toward the boom 300 by controlling the movement direction of the pressure oil so that the compressed oil is supplied to a head chamber (not shown) of the arm cylinder . In this case, the bucket installed to be connected to the arm 200 can be moved toward the boom 300. For example, the main control valve 120 may separate the arm 200 from the boom 300 by controlling the movement direction of the pressure oil so that the pressure oil supplied to the head chamber of the arm cylinder is discharged. This operation is an arm-out (D2) operation. In this case, the bucket connected to the arm 200 can be moved away from the boom 300. Accordingly, the main control valve 120 can control the arm cylinder so that the arm 200 is arm-in (D1) and arm-out (D2) according to a signal from the operation unit 110. [ The main control valve 120 may receive the signal of the operation unit 110 through the signal transfer unit 130.

Referring to FIG. 1, the signal transfer unit 130 is installed between the operation unit 110 and the main control valve 120. For example, the signal transfer unit 130 may be a cut-off solenoid provided in a pilot line connecting the operation unit 110 and the main control valve 120. The signal transfer unit 130 transmits a signal of the operation unit 110 to the main control valve 120. For example, the signal transmission unit 130 may transmit the signal of the operation unit 110 to the main control valve 120 by connecting the operation unit 110 and the main control valve 120. In this case, the operator can operate the arm 200 by operating the operation unit 110. For example, the signal transmission unit 130 may prevent the signal of the operation unit 110 from being transmitted to the main control valve 120 by disconnecting the connection between the operation unit 110 and the main control valve 120 . In this case, the operator can not operate the arm 200 even if the operator manipulates the operation unit 110. The signal transfer unit 130 may connect or disconnect the operation unit 110 and the main control valve 120 by the control unit 140. [

Referring to FIGS. 1 and 2, the controller 140 is connected to the signal transmitter 130. Accordingly, the control unit 140 can control the operation of the signal transfer unit 130. For example, the control unit 140 may control the signal transfer unit 130 by being connected to the signal transfer unit 130 through at least one of wired communication and wireless communication. The control unit 140 compares the distance between the arm 200 and the boom 300 measured by the sensor unit 150 and a predetermined reference distance and then controls the signal transfer unit 130. For example, when the distance measured by the sensor unit 150 exceeds a predetermined reference distance, the control unit 140 controls the signal transmission unit (not shown) to maintain the connection state between the operation unit 110 and the main control valve 120 130). In this case, the signal from the operation unit 110 is transmitted to the main control valve 120. Accordingly, the operator can continue to operate the arm 200. [ For example, when the distance measured by the sensor unit 150 is less than a predetermined reference distance, the controller 140 stops the operation of the signal transmitter 130. In this case, the signal of the operation unit 110 transmitted to the main control valve 120 is cut off. Thus, the arm 200 operated by the operator stops operating. Also, even if the operator continuously operates the operation unit 110 in the direction of the arm-in (D1) due to carelessness of the operator, the arm 200 may not operate. The predetermined reference distance is a distance at which the bucket does not collide with the boom 300, and may be set in advance by the operator in the controller 140. The reference distance may be previously programmed to the control unit 140 by an operator so that the reference distance is automatically changed according to the size and the load of the bucket, the length of the arm 200, and the like. Therefore, when the distance between the arm 200 and the boom 300 is less than a predetermined reference distance, the signal of the operation unit 110 is transmitted to the main control unit 100 It is possible to prevent the bucket from colliding with the boom 300 by controlling the signal transferring unit 130 so as not to be transmitted to the valve 120 and to prevent the bucket from being damaged or damaged due to carelessness of the worker .

The control unit 140 may control the signal transfer unit 130 only during the operation of the arm D1 that the distance between the arm 200 and the boom 300 approaches. For example, when the operator operates the operation unit 110 to cause the arm-in operation D1 to occur, the control unit 140 controls the operation of the operation unit 110 such that the distance between the arm 200 and the boom 300 becomes equal to or less than the reference distance The signal transmission unit 130 may be controlled to block the signal of the operation unit 110. [ The bucket connected to the arm 200 may collide with the boom 300 only when the distance between the arm 200 and the boom 300 is shortened. The controller 140 does not control the signal transfer unit 130 during the operation of the arm out D2 in which the arm 200 and the boom 300 move away from each other, So that the arm 200 can be operated. Therefore, the construction equipment 100 with the safety function according to the present invention can prevent the control unit 140 from operating whenever the operator operates the operation unit 110, thereby reducing the power consumed by the control unit 140 It is possible to reduce the cost of replacement and maintenance by extending the service life of the control unit 140. [

1 and 2, the sensor unit 150 is connected to the controller 140 through at least one of a wired communication and a wireless communication. The sensor unit 150 may include a boom 300 connected to the arm 200 to measure the distance between the arm 200 and the boom 300 rotatably coupled to the arm 200, May be installed in a lug portion of the boom (300). Accordingly, the sensor unit 150 can measure the distance between the arm 200 and the boom 300. The sensor unit 150 may provide the measured distance information to the controller 140. The sensor unit 150 may be installed to protrude from the lug of the boom 300. The sensor unit 150 may be mounted on the boom 300 in a manner that the distance between the arm 200 and the boom 300 can be measured, As shown in FIG. The sensor unit 150 may be coupled to a lug portion of the arm 200 rotatably coupled to a lug portion of the boom 300 to measure a distance between the arm 200 and the boom 300 have.

The sensor unit 150 may be a proximity sensor (Magnetic Pick-up Sensor). In this case, the sensor unit 150 may measure a distance between the arm 200 and the boom 300. For example, when the sensor unit 150 is installed in the lug portion of the boom 300, the sensor unit 150 may be configured to move the arm 200 to the boom 300, The distance between the booms 300 can be measured. For example, when the sensor unit 150 is installed in the lug part of the arm 200, the sensor unit 150 may be mounted on the arm 200, The distance between the booms 300 can be measured. The sensor unit 150 may provide the measured distance to the controller 140. The control unit 140 may control the signal transmission unit 130 by comparing the measured distance provided by the sensor unit 150 with a preset reference distance.

Although not shown, the sensor unit 150 may be an angle sensor. In this case, the sensor unit 150 may be installed at a joint portion where the arm 200 and the boom 300 are coupled to each other, so that the operation of at least one of the arm 200 and the boom 300 The angle that occurs as the device moves can be measured. In this case, the control unit 140 may set the reference angle in advance by the operator. The reference angle refers to an angle between the arm 200 and the boom 300 where the bucket coupled to the arm 200 does not collide with the boom 300. [ When the angle measured by the sensor unit 150 is less than the reference angle, the control unit 140 controls the signal transfer unit 130 to transmit a signal of the operation unit 110 to the main control valve 120 You can block things. Accordingly, the construction equipment 100 to which the safety function according to the present invention is added can prevent the bucket from colliding with the boom 300 by using various sensors, thereby reducing the cost of replacement and maintenance of the work device can do.

Referring to FIG. 3, the construction equipment 100 with the safety function according to the present invention may further include a sensor operation unit 160.

The sensor operation unit 160 operates the sensor unit 150. For example, the sensor operation unit 160 may operate the sensor unit 150 by supplying power to the sensor unit 150. In this case, the sensor unit 150 may measure the distance between the arm 200 and the boom 300. Accordingly, the construction equipment 100 to which the safety function according to the present invention is added can prevent the work equipment from being damaged or broken by preventing the work equipment from interfering with each other, have. For example, the sensor operation unit 160 may stop the operation of the sensor unit 150 by shutting off the power supplied to the sensor unit 150. In this case, the sensor unit 150 can not measure the distance between the arm 200 and the boom 300. However, in this case, even if the distance between the arm 200 and the boom 300 becomes less than the reference distance, if the bucket does not collide with the boom 300, the operator continuously operates the operation unit 110 The arm 200 can be operated. Accordingly, in this case, the construction equipment 100 to which the safety function according to the present invention is added can complete the construction work quickly although the bucket may collide with the boom 300. The sensor actuating part 160 may be formed as a switch so that it can be manually controlled by an operator. For example, the operator can operate the sensor unit 150 by selecting the switch of the sensor operation unit 160 to be On. For example, the operator can stop the operation of the sensor unit 150 by selecting the switch of the sensor operation unit 160 to be Off. Accordingly, the construction equipment 100 to which the safety function according to the present invention is added can manually operate the sensor unit 150 according to the work environment so that the worker can safely carry out the construction work, . ≪ / RTI > In addition, the construction equipment 100 to which the safety function according to the present invention is applied is configured such that when the sensor operation unit 160 is off, the power supplied to the sensor unit 150 is cut off, The life of the sensor unit 150 can be prolonged.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be clear to those who have knowledge of.

100: Construction equipment with safety function 110: Control unit
120: main control valve 130:
140: control unit 150:
160: Sensor operating part 200: Cancer
300: Boom

Claims (5)

An operation unit operated by an operator to operate the construction equipment;
A main control valve for controlling an arm cylinder that operates by receiving a signal from the operating portion and drives an arm to which a bucket is connected;
A signal transmission unit installed between the operation unit and the main control valve and transmitting a signal of the operation unit to the main control valve;
A control unit connected to the signal transfer unit and controlling operation of the signal transfer unit; And
And a sensor unit installed between the arm and the arm and connected to the control unit and measuring a distance between the arm and the boom,
Wherein the control unit stops the operation of the signal transmission unit so that the signal of the operation unit transmitted to the main control valve is blocked when the distance measured by the sensor unit is less than a predetermined reference distance. The method according to claim 1,
Wherein the sensor unit is a proximity sensor (Magnetic Pick-up Sensor). The method according to claim 1,
Wherein the sensor unit is an angle sensor. The method according to claim 1,
Wherein the control unit controls the signal transfer unit only during an arm-in operation in which the distance between the arm and the boom approaches each other. The method according to claim 1,
And a sensor operating portion for operating the sensor portion,
Wherein the sensor operation unit operates the sensor unit when the sensor operation unit is operated manually by an operator depending on a work environment.

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