CN105576614B - Electric control device for avoiding overcurrent damage - Google Patents

Abstract

The invention provides an electric control device for avoiding overcurrent damage, which includes a drive shaft, a plurality of drive wheels are equidistantly arranged on the drive shaft, hemispherical grooves are arranged on the inner peripheral surface of the drive wheel, and a cylinder shaped groove, a spring is arranged in the cylindrical groove, a metal ball is arranged between the spring and the hemispherical groove, and a transmission disc is arranged on the radial direction of each driving wheel, and the transmission disc is movably connected with the outer frame. The invention can suspend the rotation of the driving motor when the current is too large, thereby avoiding damage to the electric control device.

Description

An electric control device for avoiding overcurrent damage

technical field

The invention relates to the technical field of electric control, in particular to an electric control device for avoiding overcurrent damage.

Background technique

The existing three-sided turning is widely used in the advertising system, that is, the three-sided rotation of the advertisement is realized under the drive of the motor. The existing technology has the following three-sided turning structure: Patent No.: 201220196151.5, named "A flywheel stepping for three-sided turning billboards The Chinese utility model patent of "double drive system", and the patent number: 201520313082.5, the Chinese utility model patent named "a three-sided billboard driving device and driving wheel". That is to say, the rotation of the horizontal motor becomes the rotation of the vertical triangular plate, while the existing three-sided turning system uses a triangular plate (a driving device) to drive other multiple triangular plates to rotate, thereby realizing the rotation of the advertising surface. This has a problem, that is, once the driving device of the tri-side turn is damaged, the whole tri-side turn cannot work, or a certain triangular plate is stuck, which will cause the whole tri-side turn to be unable to rotate. This requires personnel to carry out immediate maintenance, otherwise the three-sided advertising system cannot present advertisements to people. Especially in some holidays, the maintenance personnel are on vacation, and when the passenger flow is the most at this time, if the three-side turning cannot work, it will cause serious losses. When the drive motor won't turn, the current draws too much, and if left unchecked, it will burn the motor.

Contents of the invention

The technical problem to be solved by the present invention is to provide an electric control device that avoids overcurrent damage, and solves the problem that the motor may be burned if a problem occurs during the use of the three-sided flip.

The present invention is achieved as follows: an electric control device for avoiding overcurrent damage, including an outer frame, on which a drive motor and a controller are arranged, the controller is connected to the drive motor to control the rotation of the drive motor, and the drive motor is connected in series The detection resistor, the voltage acquisition terminal of the controller is connected with the detection resistor, the controller is used to pause the rotation of the drive motor when the voltage of the detection resistor is too high, the drive motor is connected to the cylindrical drive shaft, the drive shaft is movably connected to the outer frame, and the drive A plurality of driving wheels are arranged equidistantly from the shaft, and a hemispherical groove is arranged on the inner peripheral surface of the driving wheel. The driving shaft is provided with a cylindrical groove at the driving wheel, and a spring is arranged in the cylindrical groove, and the spring and the hemispherical groove Metal balls are arranged between them, and a transmission plate is arranged radially on each driving wheel, the transmission plate is connected with the outer frame flexibly, the transmission plate and the driving wheel are vertically arranged, the side wall of the driving wheel is in contact with the side wall of the transmission plate, and the driving wheel is used for In order to drive the transmission plate to rotate, the transmission plate is provided with a first triangular plate coaxial with the transmission plate, the center of the first triangular plate is provided with a transmission shaft, and the end of the transmission shaft away from the first triangular plate is connected to the center of the second triangular plate and It is flexibly connected with the outer frame, the first triangular plate is parallel to the second triangular plate, the rotation angles of the first triangular plate and the second triangular plate relative to the transmission shaft are the same, and an advertising strip is set between the first triangular plate and the second triangular plate , the three acute angles of all the first triangular plates are provided with magnets, and one side of each first triangular plate is provided with a Hall sensor, the Hall sensor is used to sense the magnet, the Hall sensor is connected with the controller, and the controller uses When the Hall sensor is enabled, the rotation of the driving motor is suspended.

Further, the drive shaft is provided with screw holes on both sides close to the drive wheel, and a screw protruding from the drive shaft is provided in the screw hole, and the screw is used to prevent the drive wheel from moving laterally.

The invention has the following advantages: even if a certain driving wheel and transmission disk are damaged or a certain transmission shaft is damaged or the triangular disk is stuck, the invention can continue to work without immediate maintenance.

Description of drawings

Fig. 1 is the structural representation of circuit of the present invention;

Fig. 2 is the structural representation of an embodiment of the present invention;

Fig. 3 is the sectional structure schematic diagram of driving wheel of the present invention;

Fig. 4 is a schematic structural diagram of the Hall sensor arrangement of the present invention.

detailed description

In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

Referring to Fig. 1 to Fig. 4, the present invention provides an electric control device for avoiding overcurrent damage, including an outer frame 1, on which a driving motor 2 and a controller are arranged, and the controller is connected with the driving motor for controlling the driving motor Rotation, the drive motor is connected in series with a detection resistor, the voltage acquisition terminal of the controller is connected to the detection resistor, and the controller is used to pause the rotation of the drive motor when the voltage of the detection resistor is too high. As shown in FIG. 1 , the controller can control the driving motor by controlling an electronic switch, and the electronic switch can be a relay or a transistor. When the drive motor does not rotate smoothly, the current of the drive motor will increase, and the voltage at both ends of the series detection resistor will increase. When the voltage is greater than a set value, the controller can detect it, that is, it can suspend the drive of the drive motor. , to avoid the problem that the drive motor continues to work and cause damage to the drive motor. The drive motor is connected with the cylindrical drive shaft 3, and the drive shaft is movably connected with the outer frame, that is, the drive motor can drive the drive shaft to rotate. The driving shaft equidistantly is provided with a plurality of driving wheels 4, as shown in Figure 2, the inner peripheral surface of the driving wheel is provided with a hemispherical groove 40, and the driving shaft is provided with a cylindrical groove 41 at the driving wheel, and in the cylindrical groove A spring 42 is provided, a metal ball 43 is arranged between the spring and the hemispherical groove, and a transmission disc 5 is arranged radially of each driving wheel, the transmission disc is movably connected with the outer frame, and the transmission disc can rotate in the outer frame. The transmission disc and the driving wheel are vertically arranged, and the side wall of the driving wheel is in contact with the side wall of the transmission disc. The driving wheel is used to drive the transmission disc to rotate. Like this, the axis of rotation of the driving wheel is just perpendicular to the rotation axis of the transmission disc. The transmission disc is provided with the first triangular disc 6 coaxial with the transmission disc, the center of the first triangular disc is provided with a transmission shaft 7, and the end of the transmission shaft away from the first triangular disc is connected with the center of the second triangular disc 8 and is connected with the outer frame active connection. The first triangular disk is parallel to the second triangular disk, and the rotation angles of the first triangular disk and the second triangular disk relative to the transmission shaft are the same. In this way, the three sides of the first triangular plate can form three planes with the three sides of the second triangular plate, so that advertisement strips can be arranged on the three planes. That is, an advertisement strip (not shown in the figure) is arranged between the first triangular plate and the second triangular plate. The advertisement strip is to divide a complete advertisement into multiple rectangular strips, these advertisement strips are hung on the edge of the triangular plate, and multiple advertisement strips form an advertisement, the user can see the advertisement, and the place where the advertisement is seen This surface of can be called the advertisement display surface. The triangular plate has three sides, and can hang three advertisements, that is, it is turned on three sides.

When the present invention needs to switch advertisements during use, it is only necessary to energize the drive motor, and the drive motor drives the drive shaft to rotate, and the metal ball in the drive shaft blocks the drive wheel and the drive shaft, so that the drive shaft can drive the drive wheel to rotate . Then the driving wheel drives the transmission disc to rotate, and the transmission disc drives the first triangular disc and the transmission shaft above to rotate, thereby driving the second triangular disc to rotate, and finally driving the advertising bar to switch. When a certain triangular disc is stuck, then that triangular disc does not rotate, and the driving wheel connected to it will be blocked. At this time, if you want to switch the advertisement, the drive shaft will rotate, but the faulty drive wheel does not rotate, and the metal ball in the faulty drive wheel will enter the drive shaft during the mutual rotation, so that the drive shaft will not be in contact with the faulty drive wheel. If the wheels are stuck together, the faulty drive wheel does not affect the rotation of the drive shaft, and the advertisement can still be switched, but the advertisement strip on the triangular plate of the faulty drive wheel does not change, such an advertisement strip basically does not affect the push of the entire advertisement , that is, customers can still obtain advertisements from the three-sided flip system. Thus avoiding the problem that once a triangular plate is damaged, the whole system cannot work.

In the present invention, the driving wheel and the transmission disc can be connected by simple helical teeth, and then the fixed angle of the triangular disc can be switched by controlling the rotation angle of the motor. In some embodiments, the driving structure mentioned in the background art can be the three-sided turning structure, as long as the driving wheel can drive the transmission disc to rotate.

In some embodiments, in order to realize the rotation of the fixed angle of the triangular disk, as shown in Figure 4, all three acute angles of the first triangular disk are provided with magnets 9, and one side of each first triangular disk is provided with Hall sensor 10, the Hall sensor can be set on the side facing away from the three sides of the advertising display surface, the Hall sensor is used to sense the magnet, the Hall sensor is connected to the controller, and the controller is used to activate the Hall sensor when the Hall sensor is enabled. Pause the rotation of the drive motor. That is, after the controller controls the drive motor to rotate, when the magnet is closest to the Hall sensor, the Hall sensor is enabled. At this time, the triangular plate in the three-sided turning system has rotated to a suitable position, and the rotation of the drive motor can be suspended. Thereby, the rotation of the three-side turning system at a specific angle is realized. It is very convenient without special motor angle control.

On the basis of the above embodiments, the present invention can also be used for fault display, and further includes a fault display device connected to the controller, and the fault display device is used to display the status of the Hall sensor. The state of the Hall sensor can be displayed on the fault display device. For example, during the normal driving motor rotation, the Hall sensor should not be enabled. If the state of a certain Hall sensor is different from other states, then It is very likely that the triangular plate is damaged and stuck, so you can know the fault at the first time, instead of checking the display status of the three-sided advertisement outside. The invention uses a Hall sensor to realize angle detection and fault detection at the same time, which greatly reduces the complexity of the system mechanism, simplifies the structure, reduces the cost, and achieves good results at the same time.

The fault display device of the present invention may be a display screen. In some embodiments, the fault display device is a plurality of LED lights, and each LED light is associated with a detection state of a Hall sensor. Then the user can see which triangular plate is damaged by checking whether the LEDs are off at the same time, with low cost and good effect.

In order to avoid the situation that the drive wheel moves laterally on the drive shaft when the drive shaft and the drive wheel rotate with each other, the drive shaft is provided with screw holes on both sides close to the drive wheel, and screws protruding from the drive shaft are provided in the screw holes. To avoid lateral movement of the drive wheels.

The above is only an embodiment of the present invention, and does not limit the scope of patent protection of the present invention. Any equivalent structure or equivalent process transformation made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related All technical fields are equally included in the scope of patent protection of the present invention.

Claims (2)

1. a kind of electric control gear avoiding overcurrent damage it is characterised in that：Including outside framework, outside framework is provided with motor And controller, controller and motor be connected to control motor to rotate, and motor is in series with detection resistance, controls The voltage acquisition end of device is connected with detection resistance, and controller is used for collecting time-out motor during detection resistance overtension Rotate, motor is connected with cylindrical drive shaft, and drive shaft is flexibly connected with outside framework, and drive shaft has been placed equidistant multiple Driving wheel, driving wheel inner circular side face is provided with hemispherical groove, and drive shaft is provided with cylinder shape groove, cylinder at driving wheel It is provided with spring in connected in star, between spring and hemispherical groove, be provided with metal ball, being radially provided with of each driving wheel Drive plate, drive plate is flexibly connected with outside framework, and drive plate is vertically arranged with driving wheel, the side wall of driving wheel and drive plate side wall Contact, driving wheel is used for carrying nutating disk to rotate, and drive plate is provided with first triangular plate coaxial with drive plate, the first triangle Disk center is provided with power transmission shaft, and power transmission shaft is connected with the center of the second triangular plate and and outside framework away from one end of the first triangular plate It is flexibly connected, the first triangular plate is parallel with the second triangular plate, the first triangular plate and the second triangular plate are with respect to the rotation of power transmission shaft Angle is identical, is provided with advertisement bar, between the first triangular plate and the second triangular plate at three acute angles of all first triangular plates all It is provided with magnet, the side of each the first triangular plate is both provided with Hall element, Hall element is used for induced magnet, Hall Sensor is connected with controller, and controller is used for suspending the rotation of motor when Hall element is enabled；

When magnet is near Hall element, Hall element is enabled.

2. a kind of electric control gear avoiding overcurrent damage according to claim 1 it is characterised in that：Drive shaft is near drive The both sides of driving wheel are provided with screw hole, and screw in the hole is provided with the screw protruding drive shaft, and screw is used for avoiding driving wheel horizontal Mobile.