KR102629714B1 - Proportional control type lift apparatus with automatic equilibrium maintenance function - Google Patents

Abstract

According to a feature of the present invention, provided is a proportional control-type lift apparatus having an enhanced automatic equilibrium maintenance function comprising: a left side elevating/lowering plate (110) formed to have a plate shape extended to a certain length, horizontally arranged in a front-rear direction (L), having the left side front wheel of a vehicle (10) mounted at the front side, and having the left side rear wheel mounted at the rear side; a right side elevating/lowering plate (120) formed to have a plate shape extended to a certain length, horizontally arranged in the front-rear direction (L) to be spaced apart from the left side elevating/lowering plate (110) to the right side direction, having a right side front wheel of the vehicle (10) mounted at the front side, and having a right side rear wheel mounted at the rear side; an elevating/lowering driving part (130) having a lower part fixed and installed on the ground, having an upper part connected to the left side elevating/lowering plate (110) and the right side elevating/lowering plate (120), and adjusting the height of each of the elevating/lowering plates (110, 120) while driving according to an input control signal; an inclination angle sensor module (140) mounted to each of the front and rear sides of the left side elevating/lowering plate (110) and the front and rear sides of the right elevating/lowering plate (120) to measure the horizontal inclination angle (θ) of the mounted portion; and a control module (150) drive controlling the elevating/lowering driving part (130) to elevate/lower each elevating/lowering plate (110, 120) to a determined height according to a manipulation signal and informing a user of the risk of the vehicle (10) falling when an inclination angle measurement value measured from each inclination angle sensor module (140) exceeds a tolerance threshold value. The present invention can prevent a malfunction caused by being tilted even if the inclination angle is detected across all elevating/lowering plates (110, 120) overall.

Description

Proportional control lift device with enhanced automatic balance maintenance function {PROPORTIONAL CONTROL TYPE LIFT APPARATUS WITH AUTOMATIC EQUILIBRIUM MAINTENANCE FUNCTION}

The present invention relates to a proportional control lift device with an enhanced automatic balance maintenance function. More specifically, it allows maintenance and inspection by lifting a vehicle to a set height, and detects abnormal tilting of the lifting plate due to the load of the vehicle. This relates to a proportional control lift device with an enhanced automatic balance maintenance function that can warn in advance of the fall of a lifted vehicle.

Figure 1 shows the configuration of a lift device according to the prior art. Referring to the drawing, the conventional lift device 20 is horizontally arranged and includes a lifting plate 21 on which the wheels of the vehicle are seated at the front and rear, respectively, and the lower part is fixed to the ground and the upper part is connected to the lifting plate 21 to lift and lower the vehicle. It is composed of a lifting drive unit 22 that adjusts the height of the lifting plate 21 while operating, and a control module (not shown) that controls the lifting drive unit according to user operation signals.

In addition, in order to firmly support the vehicle 10, which generally has a load of several to tens of tons depending on the size of the vehicle, the lifting plate 21 or the lifting drive unit 22 is made of a high-strength metal material, but over a long period of time, the lifting plate 21 or the lifting drive unit 22 is made of a high-strength metal material. If the operation of lifting and lowering the heavy vehicle 10 is continuously repeated, the strength decreases and the horizontal lifting plate 21 may tilt and the seated vehicle 10 may slip, and in severe cases, the vehicle 10 may slip in a lifted state. ) could have resulted in a falling accident.

Moreover, as shown in the drawing, when an excessive load is placed in the luggage compartment, the rear side of the lifting plate 21 is sagged downward and the load of the vehicle 10 is further concentrated on the sagging rear side, causing the rear side of the lifting plate 21 to become excessively heavy. There was a problem with it becoming too slanted.

Registered Patent Publication No. 10-1266028 (2013.05.14), transverse drive type semi-scissor type vehicle lift. Registered Utility Model Publication No. 20-0410524 (2006.02.28), vehicle lift equipped with an extension device.

The present invention was created to solve the above-mentioned problems, and the purpose of the present invention is to detect the abnormal tilt of the lifted elevating plate due to the uneven load of the vehicle and to warn in advance of the fall of the lifted vehicle. , An automatic device that detects the inclination angles of the front and rear sides of the left elevator plate and the front and rear sides of the right elevator plate, respectively, and can check the overall tilt change of each elevator plate as well as local tilt changes on the front and rear sides. The goal is to provide a proportional control lift device with an enhanced balance maintenance function.

According to the characteristics of the present invention, the left lifting plate 110 is formed in the shape of a plate extending to a certain length and is horizontally arranged in the front-back direction (L), on which the left front wheel of the vehicle 10 is seated on the front side, and the left rear wheel is seated on the rear side. ); It is made in the shape of a plate extending to a certain length and is horizontally arranged in the forward and backward direction (L) to be spaced to the right from the left lifting plate 110, so that the right front wheel of the vehicle 10 is seated on the front side and the right rear wheel is seated on the rear side. Right lifting plate (120); The lower part is fixed to the ground and the upper part is connected to the left lifting plate 110 and the right lifting plate 120, and operates according to an input control signal to adjust the height of each lifting plate 110 and 120. Tilt angle sensor module 140 is mounted on the front and rear sides of the left lifting plate 110 and the front and rear sides of the right lifting plate 120, respectively, and measures the horizontal inclination angle (θ) of the mounting portion; And the lifting drive unit 130 is driven and controlled so that each lifting plate 110, 120 is lifted to a set height according to the operation signal, and when the tilt angle measurement measured by each tilt angle sensor module 140 exceeds the allowable threshold, the vehicle 10 A proportional control lift device with an enhanced automatic balance maintenance function including a control module 150 that informs the user of the risk of falling is provided.

According to another feature of the present invention, the control module 150 controls each of the lifting plates 110 and 120 when the inclination angle measurement value measured by each tilt angle sensor module 140 exceeds the allowable threshold while each of the lifting plates 110 and 120 is being lifted. ) A proportional control lift device with an enhanced automatic balance maintenance function is provided, characterized in that it drives and controls the lifting drive unit 130 to make an emergency stop at the current height.

According to another feature of the present invention, the control module 150 controls each lifting plate (110, 120) when the inclination angle measurement value measured by each tilt angle sensor module 140 exceeds the allowable threshold in a state in which each lifting plate (110, 120) is raised. A proportional control lift device with an enhanced automatic balance maintenance function is provided, characterized in that the lifting drive unit 130 is driven and controlled so that the lift unit (110, 120) is lowered to the minimum height.

According to another feature of the present invention, it is mounted on the front and rear sides of the left lifting plate 110 and the front and rear sides of the right lifting plate 120, respectively, to match each inclination angle sensor module 140, and receives a control signal. It further includes a display lamp 155 that blinks according to the corresponding tilt angle sensor module 140, and the control module 150 matches the tilt angle sensor module 140 when the tilt angle measurement value measured by some of the tilt angle sensor modules 140 exceeds the allowable threshold. A proportional control lift device with an enhanced automatic balance maintenance function is provided, which controls the lighting color or blinking state of the indicator lamp 155 mounted on the lifting plate area to be distinguished from other indicator lamps 155.

According to another feature of the present invention, the left lifting plate 110 and the right lifting plate 120 are automatically balanced, characterized in that they are extended in a rounded arch shape so that the central portion is relatively raised compared to the front and rear sides. A proportional control lift device with an enhanced holding function is provided.

According to another feature of the present invention, a sensing body 160 fixedly installed at a ground position; And at least one of the left lifting plate 110 or the right lifting plate 120 is disposed in a position facing upward and downward to the sensing body portion 160, and comes into contact with the sensing body portion 160 as the lifting plate descends. Or, it further includes a descent sensor module 170 that detects approach and outputs a descent detection signal, and when the control module 150 receives a descent detection signal from the descent sensor module 170, each inclination sensor module 140 A proportional control lift device with an enhanced automatic balance maintenance function is provided, which sets the current inclination angle measurement received from as the inclination angle measurement default value and compares the inclination angle measurement that varies from the set measurement default value with the allowable threshold value.

According to another feature of the present invention, when a descent detection signal is received from the descent sensor module 170, the control module 150 stores the current tilt angle measurement value received from each tilt angle sensor module 140, and the stored current tilt angle measurement value. A proportional control lift device with an enhanced automatic balance maintenance function is provided, which monitors changes in and informs the user of an abnormal state of the tilt angle measurement when the stored current tilt angle measurement value gradually increases.

According to another feature of the present invention, each inclination sensor module 140 is mounted on the front and rear sides of the left lifting plate 110 and the front and rear sides of the right lifting plate 120, respectively. It further includes a height sensor module 180 that measures the height raised by the lifting plate portion from the ground, and the control module 150 is configured to detect each height when the tilt angle measurement measured by some of the tilt angle sensor modules 140 exceeds the allowable threshold. The height measurements measured by the sensor module 180 are compared with each other, and if each height measurement is within the tolerance range, it is determined to be a malfunction of some of the tilt angle sensor modules 140, and if each height measurement is outside the tolerance range, the vehicle (10 ) A proportional control lift device with an enhanced automatic balance maintenance function is provided, which is characterized by informing the user of the risk of falling.

According to another feature of the present invention, the height sensor module 180 includes a support frame 181 on one side of which is fixedly installed at the mounting portion of each lifting plate 110 and 120, and a support frame 181 on the other side of the support frame 181. A body portion 182 that is horizontally coupled to rotate, a weight portion 183 mounted on the bottom of the body portion 182, and an ultrasonic wave or It includes a sensor head 184 that measures the height raised from the ground by firing a laser and receiving ultrasonic waves or lasers reflected on the ground, and the weight unit 183 has the center of gravity of the body unit 182 at the bottom. Automatic, characterized in that the sensor head 184 always emits ultrasonic waves or lasers facing directly downward, regardless of the change in the inclination angle of each elevator plate (110, 120) by applying a load to the body portion (182) to position the sensor head (184). A proportional control lift device with an enhanced balance maintenance function is provided.

Meanwhile. According to another feature of the present invention, each inclination sensor module 140 is mounted on the front and rear sides of the left lifting plate 110 and the front and rear sides of the right lifting plate 120, respectively. It further includes a height sensor module 180 that measures the height (H) raised by the lifting plate portion from the ground, and the control module 150 is configured to detect the vehicle on the left lifting plate 110 and the right lifting plate 120. When (10) is seated and a lift operation signal is input through the control unit 151, each lifting plate (110, 120) stops in the raised state to the set safe lift height (H4) and is measured by each height sensor module (180). The height measurements are compared with each other, and if each height measurement is within the tolerance range, the current inclination angle measurement received from each inclination angle sensor module 140 is set as the inclination angle measurement default value, and then the driving control is performed so that each elevator plate (110, 120) rises sequentially. A proportional control lift device with an enhanced automatic balance maintenance function is provided.

As above, according to the present invention,

First, the left lifting plate 110 is made in the shape of a plate extended to a certain length and is arranged horizontally in the front-to-back direction (L), so that the left front wheel of the vehicle 10 is seated on the front side, the left rear wheel is seated on the rear side, and the right-side passenger board is seated on the left side. The steel plate 120 is made in the shape of a plate extending to a certain length and is horizontally arranged in the forward and backward directions (L) to be spaced to the right from the left lifting plate 110, so that the right front wheel of the vehicle 10 is seated on the front side and the rear right wheel is seated on the front side. The right rear wheel is seated on the side, and the lower part of the lifting drive unit 130 is fixed to the ground and the upper part is connected to the left lifting plate 110 and the right lifting plate 120 and drives according to the input control signal to lift each lifting plate ( 110, 120), and the inclination angle sensor module 140 is mounted on the front and rear sides of the left lifting plate 110 and the front and rear sides of the right lifting plate 120, respectively, to determine the horizontal inclination angle of the mounting area. (θ) is measured, and the control module 150 drives and controls the lifting drive unit 130 to raise and lower each lifting plate 110 and 120 to a set height according to the operation signal, and the tilt angle measurement measured by each tilt angle sensor module 140. When it exceeds the allowable threshold, it detects that each of the lifted lifting plates 110 and 120 is tilted abnormally due to the uneven load of the vehicle 10, and the lifted It is possible to warn in advance of the fall of the vehicle 10, and detect the inclination angles of the front and rear sides of the left lifting plate 110 and the front and rear sides of the right lifting plate 120, respectively, so that each lifting plate 110, 120 ) has the advantage of being able to check not only the overall slope change, but also local slope changes on the anterior and posterior sides.

Second, the control module 150 emergencyly stops each elevator plate (110, 120) at the current height when the tilt angle measurement value measured by each tilt angle sensor module 140 exceeds the allowable threshold while each elevator plate (110, 120) is being lifted. By controlling the driving of the lifting mechanism 130 to do so, it is possible to prevent the load from being concentrated on the bent portion due to movement due to the lifting movement when each of the lifting plates 110 and 120 is tilted.

Third, the control module 150 lowers each elevator plate 110, 120 to the lowest height when the tilt angle measurement value measured by each tilt angle sensor module 140 exceeds the allowable threshold while each elevator plate 110, 120 is raised. By controlling the driving of the lifting drive unit 130 so that the load of the vehicle 10 is continuously applied to each lifting plate 110 and 120, it is possible to prevent the bent portion from further tilting.

Fourth, the table lamp 153 is mounted on the front and rear sides of the left lifting plate 110 and the front and rear sides of the right lifting plate 120, respectively, to match each inclination angle sensor module 140 and responds to the control signal. The control module 150 flashes accordingly, and when the tilt angle measurement measured by some of the tilt angle sensor modules 140 exceeds the allowable threshold, the display lamp 155 mounted on the lifting plate area matched with the tilt angle sensor module 140 ) is controlled so that its lighting color or blinking state is distinguishable from that of other display lamps 155, so that the area where the tilt phenomenon occurs among the front and rear sides of each elevator plate (110, 120) can be intuitively recognized, and accordingly, timely Appropriate measures can be taken.

Fifth, the left lifting plate 110 and the right lifting plate 120 are formed to extend in a rounded arch shape so that the central portion is relatively raised compared to the front and rear sides, thereby reducing the load applied to each lifting plate 110 and 120. is resisted by axial force, and a horizontal force is generated along with a vertical force in the central area, thereby preventing the lifting plates 110 and 120 from sagging downward due to the load of the vehicle 10.

Sixth, the sensing body 160 is fixedly installed at the ground position, and the lowering sensor module 170 is mounted on one or more of the left lifting plate 110 or the right lifting plate 120 with the sensing body 160 up and down. It is disposed in a position opposite to the lowering plate and detects contact with or approach to the sensing body 160 as the lifting plate descends and outputs a lowering detection signal. The control module 150 receives a lowering detection signal from the lowering sensor module 170. When received, the current tilt angle measurement received from each tilt angle sensor module 140 is set as the tilt angle measurement default value and the tilt angle measurement that changes from the set measurement basic value is compared with the allowable threshold value, so that the portion where the tilt angle sensor module 140 is mounted Even if local deformation occurs or the coupling state of the descent sensor module 170 mounted on each lifting plate 110, 120 becomes loose and the inclination angle measurement position of the corresponding inclination sensor module 140 changes, the default inclination angle measurement value is changed during each descending operation. By resetting to zero setting, the inclination angle can be detected based on the change in the measurement position, and although the overall inclination angle of each elevator plate (110, 120) is not inclined, it is possible to prevent malfunction as the inclination occurred due to the change in the measurement location. You can.

Seventh, when a descent detection signal is received from the descent sensor module 170, the control module 150 stores the current tilt angle measurement value received from each tilt angle sensor module 140, monitors changes in the stored current tilt angle measurement value, and stores the current tilt angle measurement value. When the inclination angle measurement value gradually increases, the user is informed of an abnormality in the inclination angle measurement, and as described above, local deformation of the inclination plate area on which the inclination angle sensor module 140 is mounted or the phenomenon of worsening of the coupling state is detected and the inclination angle is detected. Measurement errors can be prevented in advance.

Eighth, the height sensor module 180 is mounted on the front and rear sides of the left lifting plate 110 and the front and rear sides of the right lifting plate 120, respectively, to match each inclination angle sensor module 140. The lift plate portion measures the height raised from the ground, and the control module 150 measures the height measured by each height sensor module 180 when the tilt angle measurement measured by some of the tilt angle sensor modules 140 exceeds the allowable threshold. If each height measurement value is within the tolerance range, it is determined to be a malfunction of some of the tilt angle sensor modules 140, and if each height measurement value is outside the tolerance range, the user is informed of the risk of falling of the vehicle 10, It is possible to check whether tilt has been detected due to malfunction of some of the tilt angle sensor modules 140 or whether tilt has actually occurred in the lifting plates 110 and 120, and the detection reliability can be greatly increased by crossing the tilt angle using tilt angle measurements and height measurements. You can.

Ninth, the height sensor module 180 includes a support frame 181 on one side of which is fixedly installed on the mounting portion of each lifting plate 110 and 120, and a body part coupled to the other side of the support frame 181 on a horizontal axis so as to freely rotate. (182), a weight part 183 mounted on the lower part of the body part 182, and an ultrasonic wave or laser mounted on the weight part 183 or the body part 182 to emit ultrasonic waves or lasers toward the ground and reflect them on the ground. It includes a sensor head 184 that measures the height raised from the ground by receiving ultrasonic waves or lasers, and the weight unit 183 is positioned at the bottom of the body unit 182 so that the center of gravity of the body unit 182 is located at the bottom. By applying a load to the sensor head 184 to always emit ultrasonic waves or lasers facing directly downward regardless of the change in the inclination angle of each of the lifting plates 110 and 120, the lifting plates 110 and 120 are tilted and the sensor head (184) is tilted. 184) can prevent the phenomenon of measuring the height in a diagonal direction, and thus prevent errors from occurring in the height measurement value of the height sensor module 180 when the lifting plates 110 and 120 are tilted.

Tenth, the height sensor module 180 is mounted on the front and rear sides of the left lifting plate 110 and the front and rear sides of the right lifting plate 120, respectively, to match each inclination angle sensor module 140. The height (H) of the lifting plate portion is measured from the ground, and the control module 150 operates the operating unit 151 with the vehicle 10 seated on the left lifting plate 110 and the right lifting plate 120. When a raise operation signal is input through the elevating plate (110, 120), each lifting plate (110, 120) stops in the raised state at the set safe elevation height (H4), and the height measurements measured by each height sensor module (180) are compared with each other, so that each height measurement value is acceptable. If it is within the error range, the current tilt angle measurement received from each tilt angle sensor module 140 is set as the default tilt angle measurement value, and then each lifting plate 110 and 120 is driven to rise, thereby lifting the vehicle 10 and lifting the vehicle 10. A load of is applied to each lifting plate (110, 120), so even if an inclination angle is detected in all lifting plates (110, 120), malfunction due to being in a tilted state can be prevented.

Figure 1 is a perspective view showing the configuration of a proportional control lift device with an enhanced automatic balance maintenance function according to the prior art;
Figure 2 is a perspective view showing a state in which a vehicle is seated on a proportional control lift device with an enhanced automatic balance maintenance function according to a preferred embodiment of the present invention;
Figure 3 is a perspective view showing the configuration of a proportional control lift device with an enhanced automatic balance maintenance function according to a preferred embodiment of the present invention;
Figure 4 is a side cross-sectional view showing a state in which an inclination sensor module is mounted on a lifting plate according to a preferred embodiment of the present invention;
Figure 5 is a schematic diagram illustrating the operating principle of detecting the inclination angle of an elevator plate using an inclination angle sensor module according to a preferred embodiment of the present invention;
Figure 6 is a side cross-sectional view illustrating the operating principle of the tilt angle sensor module detecting the tilted state of the elevator plate according to a preferred embodiment of the present invention;
Figure 7 is a side cross-sectional view showing a state in which local deformation occurs in the lifting plate or the coupling state of the inclination sensor module is deformed according to a preferred embodiment of the present invention;
Figure 8 is a perspective view showing the configuration of the sensing body and the lowering sensor module according to a preferred embodiment of the present invention;
Figure 9 is a side cross-sectional view showing the configuration of a height sensor module according to a preferred embodiment of the present invention;
Figure 10 is a side cross-sectional view for explaining the operating principle of detecting the height of the mounting part in the height sensor module according to a preferred embodiment of the present invention;
Figure 11 is a perspective view showing the detailed configuration of the height sensor module according to a preferred embodiment of the present invention;
Figure 12 is a side cross-sectional view for explaining the operating principle of the height sensor module according to a preferred embodiment of the present invention always detecting the height directly below by the weight portion;
Figure 13 is a side view to explain the operating principle of measuring the height in a state where the lifting plate rises to a safe lifting height and then stops in a preferred embodiment of the present invention and then rising.

The purpose, features and advantages of the present invention described above will become clearer through the following detailed description. Hereinafter, a preferred embodiment of the present invention will be described based on the attached drawings.

The proportional control lift device 100 with an enhanced automatic balance maintenance function according to a preferred embodiment of the present invention lifts the vehicle 10 mounted on the top to a set height to enable maintenance and inspection, as shown in FIG. It is a device that detects abnormal tilt of the lifting plates 110 and 120 due to the load of the vehicle 10 and warns in advance of the fall of the lifted vehicle 10, as shown in FIGS. 2 and 3. It includes a left lifting plate 110, a right lifting plate 120, a lifting drive unit 130, an inclination angle sensor module 140, and a control module 150.

First, the left lifting plate 110 and the right lifting plate 120 are means for providing a support surface on which the vehicle 10 is seated so that the vehicle 10 can be lifted. The left lifting plate 110 has a certain length. It is made in the shape of an extended plate and is horizontally arranged in the front-to-back direction (L), so that the left front wheel of the vehicle 10 is seated on the front side and the left rear wheel is seated on the rear side.

In addition, the right lifting plate 120, like the left lifting plate 110, is made in the shape of a plate extending a certain length and is horizontally arranged in the forward and backward direction (L) to be spaced to the right from the left lifting plate 110. The right front wheel of the vehicle 10 is seated on the side, and the right rear wheel is seated on the rear side.

Here, the left lifting plate 110 and the right lifting plate 120 are arranged to be spaced apart laterally to form an empty space between the two lifting plates 110 and 120 to maintain and inspect the lower part of the vehicle 10 mounted on the upper part. to be able to do so. Additionally, a jack 190 may be provided between the two lifting plates 110 and 120 to further elevate the seated vehicle 10 from the lifting plates 110 and 120.

The lifting drive unit 130 is a component that provides the driving force necessary to lift the lifting plates 110 and 120 to adjust their heights. The lower part is fixed to the ground and the upper part is connected to the left lifting plate 110 and the right lifting plate 120. The height of each lifting plate (110, 120) is adjusted while operating according to the input control signal.

Here, in the drawing, the driving frame 131 is condensed in the shape of an It may be supported on a post of a four-post type to raise and lower the lifting plate, and various types of driving means used to raise and lower the lifting plate 110 and 120 in the technical field to which the present invention pertains can be used.

The inclination angle sensor module 140 is a sensor means for detecting a tilt phenomenon by measuring the inclination angle of the elevating plates 110 and 120. As shown in FIGS. 3 to 5, the inclination angle sensor module 140 is located at the front side of the left elevating plate 110 and the It is installed on the rear side and on the front and rear sides of the right side, respectively, to measure the horizontal inclination angle (θ) of the mounting area.

Here, the inclination angle sensor module 140 is preferably firmly supported on the elevating plates 110 and 120 and fixedly mounted so that its position does not change. As shown in FIG. 4, the elevating plates 110 and 120 form a seating surface. When composed of a horizontal frame 111 and a vertical frame 112 that extends downward along the circumference of the horizontal frame 111 and forms a side, the edge where the horizontal frame 111 and the vertical frame 112 contact is It is desirable that it be provided so that it is firmly supported on the two contact surfaces while being installed.

In addition, the inclination sensor module 140 shown in FIG. 5 can detect a change in inclination in the forward and backward directions (L) of the lifting plates 110 and 120 by detecting the inclination angle of the A change in the width direction (W) slope of (110,120) can be detected. The inclination angle sensor module 140 may use one or more sensors for detecting the displacement of an object, such as an inclination sensor, a tilt sensor, an angular velocity sensor, an angle sensor, and a gyro sensor.

In this way, the tilt angle sensor module 140 mounted on each of the lifting plates 110 and 120 electrically detects that the lifting plates 110 and 120 rise when they are in a horizontal state parallel to the horizontal line L without tilting, as shown in (a) of FIG. 6. A tilt angle measurement value, which is a signal, is generated and transmitted to the control module 150, and when a tilt phenomenon occurs in the area where the tilt angle sensor module 140 is mounted on the lifting plates 110 and 120, as shown in (b) of FIG. 6, the rising By generating the inclination angle measurement value and transmitting it to the control module 150, the horizontal inclination angle (θ) of the mounting area (front and rear sides of the left lifting plate 110, front and rear sides of the right lifting plate 120) can be measured.

The control module 150 is a control means that controls the elevating drive unit 130 to lift the vehicle 10 by raising and lowering the elevating plates 110 and 120 to the height desired by the user, and receives an operation signal through the operation unit 151. The lifting drive unit 130 is driven and controlled so that each lifting plate 110, 120 is raised and lowered to the set height, and if the tilt angle measurement measured by each tilt angle sensor module 140 exceeds the allowable threshold, the risk of falling of the vehicle 10 is reduced. Guide the user.

Here, as shown in FIG. 2, the control module 150 includes, in addition to the operation unit 151 for inputting the user's operation signal, a speaker 152 for sound guidance of the risk of falling, and a lamp for guiding the user to a lighting state ( 153) may be provided, and in addition, a display may be provided to provide guidance on the risk of falling in the form of images or text.

Additionally, the allowable threshold may be set in consideration of the tilt angle at which the vehicle 10 mounted on the lifting plates 110 and 120 may fall while tilting.

The biased load of the vehicle 10 is distributed through the combined configuration of the left lifting plate 110, the right lifting plate 120, the lifting drive unit 130, the inclination angle sensor module 140, and the control module 150 as described above. Due to this, it is possible to detect the abnormal tilt of each of the lifted lifting plates (110, 120) and warn in advance of the fall of the lifted vehicle (10), and the front and rear sides of the left lifting plate (110) and the right riding By detecting the inclination angles of the front and rear sides of the steel plate 120, there is an advantage of being able to check the overall inclination change of each lifting plate 110 and 120 as well as the local inclination change in the front and rear sides.

The control module 150 can determine the tilted state of each lifting plate 110, 120 through the tilt angle measurement value received from the tilt angle sensor module 140, and drives the lifting drive unit 130 to control the tilted lifting plate 110, 120. ) can be controlled to be automatically parallel.

As shown in FIG. 3, the driving frame 131 of the lifting mechanism 130 is provided with respective components corresponding to the front and rear sides of the left lifting plate 110 and the front and rear sides of the right lifting plate 120, respectively. An actuator 132 is provided, and the control module 150 controls the tilted portion of the front and rear sides of each lifting plate 110 and 120 based on the tilt angle measurement received from each tilt angle sensor module 140. It can be determined, and when a part (for example, the rear side of the left lifting plate 110) where the equilibrium state is tilted occurs, the actuator 132 at the position corresponding to the part is driven further than the current state so that the part is in the balanced state. The drive can be controlled using proportional control until . Accordingly, when the inclination angle measurement exceeds the allowable threshold, the user is informed of the risk of falling of the vehicle 10 and at the same time, the elevator drive unit 130 is driven and controlled to maintain equilibrium, thereby automatically implementing the balance maintenance function.

In addition, the control module 150 causes each lifting plate 110, 120 to emergency stop at its current height when the inclination angle measurement value measured by each tilt angle sensor module 140 exceeds the allowable threshold while each lifting plate 110, 120 is being lifted. By controlling the driving of the lifting mechanism 130 to do so, it is possible to prevent the load from being concentrated on the bent portion due to movement due to the lifting movement when each of the lifting plates 110 and 120 is tilted.

And, the control module 150 lowers each of the elevator plates 110 and 120 to the lowest height when the tilt angle measurement value measured by each tilt angle sensor module 140 exceeds the allowable threshold while each of the elevator plates 110 and 120 is raised. By controlling the driving of the lifting drive unit 130 so that the load of the vehicle 10 is continuously applied to each lifting plate 110 and 120, it is possible to prevent the bent portion from further tilting.

In addition, as shown in FIG. 3, it is mounted on the front and rear sides of the left lifting plate 110 and the front and rear sides of the right lifting plate 120, respectively, to match each inclination angle sensor module 140, and is connected to the control signal. It may further include a display lamp 155 that blinks accordingly.

Here, when the tilt angle measurement measured by some of the tilt angle sensor modules 140 exceeds the allowable threshold, the control module 150 turns on the display lamp 155 mounted on the lifting plate area matched with the tilt angle sensor module 140. The lighting is controlled so that the color or blinking state is distinguishable from other display lamps (155). Through this display lamp 155, it is possible to intuitively recognize the area where the tilt phenomenon occurs among the front and rear sides of each lifting board 110 and 120, and accordingly, appropriate measures can be taken at the right time.

Although not shown, the left lifting plate 110 and the right lifting plate 120 are formed to extend in a rounded arch shape so that the central portion is relatively raised compared to the front and rear sides, thereby reducing the force applied to each lifting plate 110 and 120. The load is resisted by axial force, and a horizontal force is generated along with a vertical force in the central area, thereby preventing the lifting plates 110 and 120 from sagging downward due to the load of the vehicle 10.

Meanwhile, local deformation occurs in the area where the inclination sensor module 140 is mounted, as shown in (a) of FIG. 7, or the lowering sensor module 170 mounted on each lifting plate 110 and 120, as shown in (b) of FIG. ) If the connection condition becomes loose, a detection error may occur as the measurement position changes.

Accordingly, the proportional control lift device 100 with an enhanced automatic balance maintenance function according to a preferred embodiment of the present invention can prevent the above detection error by using the sensing body 160 and the lowering sensor module 170.

For this purpose, as shown in FIGS. 8 and 9, the sensing body 160 is fixedly installed at the ground position, and the lowering sensor module 170 is installed on one of the left lifting plate 110 or the right lifting plate 120. The above-mentioned lifting plate is disposed at a position facing upward and downward to the sensing body 160, and detects contact with or approach to the sensing body 160 as the lifting plate descends, and outputs a lowering detection signal.

Here, the sensor unit 160 includes a base frame 161 fixed to the ground, a post 162 arranged upright at a position corresponding to the lowering sensor module 170 on the base frame 161, and the post It may include a sensing piece 163 disposed to protrude laterally on the post 162 and an adjustment screw 164 for adjusting the height of the sensing piece 163 on the post 162.

In addition, the lowering sensor module 170 may be provided in the form of a limit switch that outputs a detection signal while contacting the sensing piece 163 when the lifting plates 110 and 120 are lowered. In addition, it may be provided in the form of a limit switch to prevent access to the sensing body 160. Various types of contact or non-contact detection sensors, such as optical sensors or magnetic sensors, may be used.

In addition, the lowering sensor module 170 may be mounted on only one of the lifting plates 110 and 120, or a plurality of them may be mounted on each lifting plate 110 and 120, and may be installed on the front side of the left lifting plate 110. , When placed on the front and rear sides of the rear and right lifting plates 120, it is possible to detect whether each mounting part is simultaneously lowered, so that the tilted state of some mounting parts can be indirectly confirmed.

For example, if the lowering sensor module 170 mounted on some mounting portions outputs a lowering detection signal before other lowering sensor modules 170, it is determined that some mounting portions are tilted downward relative to other mounting portions. , if the lowering sensor module 170 of some mounting parts outputs a lowering detection signal later than other lowering sensor modules 170, it can be determined that the lowering sensor module 170 is tilted upward relative to other mounting parts.

In addition, when a descent detection signal is received from the descent sensor module 170, the control module 150 sets the current inclination angle measurement received from each inclination angle sensor module 140 as the inclination angle measurement default value and the inclination angle that changes from the set measurement default value. Compare the measurements to the above acceptance thresholds. Therefore, local deformation occurs in the area where the descent sensor module 170 is mounted, or the coupling state of the descent sensor module 170 mounted on each lifting plate 110, 120 becomes loose, and the inclination angle of the corresponding descent sensor module 170 is measured. Even if the position changes, the default inclination angle measurement value is reset to zero during each lowering operation, so the inclination angle can be detected based on the change in the measuring position. In addition, although the overall inclination angle of each lifting plate 110 and 120 is not inclined, it is possible to prevent malfunction due to inclination due to a change in the measurement position.

In addition, when a descent detection signal is received from the descent sensor module 170, the control module 150 stores the current tilt angle measurement value received from each tilt angle sensor module 140, monitors changes in the stored current tilt angle measurement value, and stores the current tilt angle measurement value. When the inclination angle measurement value gradually increases, the user is informed of an abnormality in the inclination angle measurement, and as described above, local deformation of the inclination plate area on which the inclination angle sensor module 140 is mounted or the phenomenon of worsening of the coupling state is detected and the inclination angle is detected. Measurement errors can be prevented in advance.

Meanwhile, the proportional control lift device 100 with an enhanced automatic balance maintenance function according to a preferred embodiment of the present invention can detect the malfunction of each inclination sensor module 140 using the height sensor module 180.

To this end, as shown in FIG. 9, the height sensor module 180 is positioned on the front and rear sides of the left lifting plate 110 and the front side of the right lifting plate 120 to match each inclination angle sensor module 140. It is installed on the and rear sides, respectively, and measures the height that the mounted lifting plate has risen from the ground.

Here, as the height sensor module 180, an ultrasonic sensor or a laser sensor that measures the height by emitting ultrasonic waves or lasers and receiving ultrasonic waves or lasers reflected from the ground can be used. In addition, in the technical field to which the present invention belongs, Various types of distance sensors that can measure distance can be used.

In addition, a reflector 181 is provided on the ground at a position corresponding to the height sensor module 180 so that the ultrasonic waves or lasers emitted from the height sensor module 180 are reflected upward rather than scattered, thereby increasing the reception rate.

In addition, the control module 150 compares the height measurements measured by each height sensor module 180 with each other when the inclination angle measurements measured by some of the inclination angle sensor modules 140 exceed the allowable threshold, and each height measurement value is within the tolerance range. If it is within the range, it is determined to be a malfunction of some of the tilt angle sensor modules 140, and if each height measurement value is outside the tolerance range, the user is informed of the risk of falling of the vehicle 10.

Therefore, as shown in (a) of FIG. 10, each height sensor module 180 mounted on the front and rear sides of each lifting plate 110 and 120 has the same height measurement value when the lifting plates 110 and 120 are not tilted. (H2) is measured, and when a portion of the lifting plates 110 and 120 is tilted downward as shown in (b) of FIG. 10, the height sensor module 180 mounted on the corresponding mounting area measures a different height measurement value (H3). The measurement is made, and the control module 150 compares each height measurement value (H2, H3) to determine whether the difference is within the tolerance range and determines whether it is a malfunction of the tilt angle sensor module 140 or a fall of the vehicle 10. It is possible to determine whether a situation is dangerous or not.

In this way, it is possible to check whether some of the tilt angle sensor modules 140 have detected tilt due to malfunction or whether tilt has actually occurred in the lifting plates 110 and 120, and the detection reliability can be increased by cross-checking the tilt angle using the tilt angle measurement and height measurement. It can be greatly increased.

However, when the height sensor module 180 is fixedly installed on the elevating plates 110 and 120 and measures the height by emitting ultrasonic waves or lasers directly downward, a portion of the elevating plates 110 and 120 is tilted as shown in (b) of FIG. 10. If this happens, the direction in which ultrasonic waves or lasers are emitted is tilted, which may cause errors in height measurements.

Accordingly, as shown in FIG. 11, the height sensor module 180 includes a support frame 181 on one side of which one side is fixedly installed at the mounting portion of each lifting plate 110 and 120, and a free rotation on the other side of the support frame 181. A body portion 182 that is horizontally coupled to the It includes a sensor head 184 that measures the height raised from the ground by emitting and receiving ultrasonic waves or lasers reflected by the ground.

In addition, the weight part 183 applies a load to the body part 182 so that the center of gravity of the body part 182 is located at the bottom, so that it is independent of the change in inclination angle of each lifting plate 110 and 120, as shown in FIG. 12. Thus, the sensor head 184 can always emit ultrasonic waves or lasers while facing directly downward.

A horizontally extending rotation axis 185 is formed on both sides of the body portion 182, is axially coupled to the support frame 181 and rotates horizontally with respect to the support frame 181, and the rotation axis 185 and the support frame ( 181), a bearing 186 is provided between them to minimize rotational friction.

Therefore, it is possible to prevent the phenomenon of the sensor head 184 measuring the height in a diagonal direction due to the elevation plates 110 and 120 being tilted, and thus the height of the height sensor module 180 when the elevation plates 110 and 120 are tilted. It is possible to prevent errors from occurring in measured values.

In addition, the height sensor module 180 is mounted on the front and rear sides of the left lifting plate 110 and the front and rear sides of the right lifting plate 120, respectively, to match each inclination angle sensor module 140. The height of the lifting plate portion is measured from the ground, and the control module 150 raises the vehicle 10 through the operation unit 151 while the vehicle 10 is seated on the left lifting plate 110 and the right lifting plate 120. When an operation signal is input, as shown in (a) of Figure 13, each lifting plate (110, 120) stops in the state of rising to the set safety elevation height (H4) and compares the height measurements measured by each height sensor module (180) with each other. If each height measurement value is within the tolerance range, the current tilt angle measurement received from each tilt angle sensor module 140 is set as the default tilt angle measurement value, and then each lifting plate 110 and 120 is driven and controlled to rise.

Therefore, as the vehicle 10 is lifted, the load of the vehicle 10 is applied to each lifting plate 110 and 120, and even if an inclination angle is detected in all the lifting plates 110 and 120, malfunction due to being in a tilted state can be prevented.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications and changes are possible without departing from the technical spirit of the present invention. It will be clear to those who have knowledge.

100... Proportional control lift device with enhanced automatic balance maintenance function
110...left elevator plate 120...right elevator plate
130... Eastern part of the elevator shaft 140... Tilt angle sensor module
150...control module 160...sensing body
170...Down sensor module 180...Height sensor module
181...Support frame 182...Body part
183...Weight part 184...Sensor head
10...vehicle

Claims (5)

The left lifting plate 110 is made in the shape of a plate extending to a certain length and is horizontally arranged in the front-back direction (L), so that the left front wheel of the vehicle 10 is seated on the front side and the left rear wheel is seated on the rear side; It is made in the shape of a plate extending to a certain length and is horizontally arranged in the forward and backward direction (L) to be spaced to the right from the left lifting plate 110, so that the right front wheel of the vehicle 10 is seated on the front side and the right rear wheel is seated on the rear side. Right lifting plate (120); The lower part is fixed to the ground and the upper part is connected to the left lifting plate 110 and the right lifting plate 120, and operates according to an input control signal to adjust the height of each lifting plate 110 and 120. Tilt angle sensor module 140 is mounted on the front and rear sides of the left lifting plate 110 and the front and rear sides of the right lifting plate 120, respectively, and measures the horizontal inclination angle (θ) of the mounting portion; The elevator drive unit 130 is driven and controlled so that each elevator plate 110, 120 is lifted to a set height according to the operation signal. If the tilt angle measurement measured by each tilt angle sensor module 140 exceeds the allowable threshold, there is a risk of falling of the vehicle 10. A control module 150 that guides the user; A sensing body unit 160 fixedly installed at a ground position; And at least one of the left lifting plate 110 or the right lifting plate 120 is disposed in a position facing upward and downward to the sensing body portion 160, and comes into contact with the sensing body portion 160 as the lifting plate descends. Or a descent sensor module 170 that detects approach and outputs a descent detection signal;
When a descent detection signal is received from the descent sensor module 170, the control module 150 sets the current tilt angle measurement received from each tilt angle sensor module 140 as the tilt angle measurement default value and sets the tilt angle measurement that varies from the set measurement default value. A proportional control lift device with an enhanced automatic balance maintenance function, characterized in that comparison with the above allowable threshold.
delete In claim 1,
To match each inclination angle sensor module 140, the raised plate portions are mounted on the front and rear sides of the left lifting plate 110 and the front and rear sides of the right lifting plate 120, respectively, to determine the height raised from the ground. It further includes a height sensor module 180 for measuring,
The control module 150 compares the height measurements measured by each height sensor module 180 when the inclination angle measurements measured by some of the inclination sensor modules 140 exceed the allowable threshold, and when each height measurement value is within the tolerance range, the control module 150 compares the height measurements measured by each height sensor module 180 with each other. A proportional control lift with an enhanced automatic balance maintenance function, characterized in that it determines a malfunction of some of the inclination sensor modules 140 and informs the user of the risk of falling of the vehicle 10 if each height measurement value is outside the tolerance range. Device.
In claim 3,
The height sensor module 180 is,
A support frame (181) on one side of which is fixedly installed at the mounting portion of each lifting plate (110, 120),
A body portion 182 coupled to the other side of the support frame 181 on a horizontal axis so as to freely rotate,
A weight portion 183 mounted at the bottom of the body portion 182, and
Includes a sensor head 184 that is mounted on the weight portion 183 or body portion 182 and measures the height raised from the ground by emitting ultrasonic waves or lasers toward the ground and receiving ultrasonic waves or lasers reflected by the ground. And
The weight unit 183 applies a load to the body unit 182 so that the center of gravity of the body unit 182 is located at the bottom, so that the sensor head 184 always operates regardless of the change in inclination angle of each lifting plate 110 and 120. A proportional control lift device with an enhanced automatic balance maintenance function, characterized by firing ultrasonic waves or lasers while pointing directly downward.
delete

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