CN111877910A - Electric door closer - Google Patents

Abstract

The invention discloses an electric door closer, comprising a mounting seat, a motor and an execution shaft. The motor is fixedly installed on the mounting seat, a sliding block is slidably arranged on the mounting seat, and both the motor and the execution shaft form a linkage with the sliding block. The slider is fixedly connected with a pull rod, the pull rod is sleeved with a spring, the end of the spring close to the slider is pressed against the mounting seat, the pull rod is fixedly sleeved with a washer, and the washer is pressed against the mounting seat. On the end of the spring away from the slider, the motor is provided with a damping circuit and a power detection switch; the power detection switch is used to detect whether the external power supply is normally supplied, and when the external power supply is normal, the motor is switched to Connects to the external power source, and switches the motor into communication with the damping circuit when the external power source is de-energized. Through the above arrangement, the present invention provides an electric door closer that can automatically close the door even when the external power supply is cut off, and the door closing speed of the electric door closer is controlled and adjusted by the damping circuit.

Description

Electric door closer

technical field

The invention relates to an electric door closer.

Background technique

At present, the electric door closer mainly includes a motor and an execution shaft. The motor is linked with the execution shaft, and the execution shaft is connected with the door through a connecting arm, that is, when the motor works, it drives the execution shaft to rotate, so as to realize the automatic opening and closing of the door. . Since the motor needs to be powered by an external power supply, when the external power supply is cut off, the existing electric door closer cannot work, and the door can only be opened and closed manually, and there is room for improvement.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the present invention provides an electric door closer that can automatically close the door even when the external power supply is cut off, and the door closing speed of the electric door closer is controlled and adjusted by a damping circuit.

In order to achieve the above purpose, the present invention provides an electric door closer, which includes a mounting seat, a motor, and an execution shaft. The motor is fixedly installed on the mounting seat, and a slider is slidably arranged on the mounting seat. It forms a linkage with the slider, the slider is fixedly connected with a pull rod, the pull rod is sleeved with a spring, the end of the spring close to the slider is pressed against the mounting seat, and the pull rod is fixedly sleeved with a washer, The washer is pressed against the end of the spring away from the slider, and the motor is provided with a damping circuit and a power detection switch;

The power detection switch is used for detecting whether the external power supply is normally supplied, and switches the motor to be connected to the external power supply when the external power supply is normal, and switches the motor to be connected to the damping circuit when the external power supply is powered off;

The damping circuit includes a plurality of branches with different resistance values, one end of the plurality of branches is connected in parallel with the motor, and the other end is connected to the power detection switch through a switch. The switch is connected with a position sensor for sensing the position of the spring and triggering it to perform corresponding switching.

The beneficial effects of the present invention are: with the above arrangement, when the external power supply is normally supplied, the motor works to drive the execution shaft to rotate through the slider, so as to drive the door to automatically open and close through the connection of the connecting arm. When the external power supply is cut off, the motor is switched to be connected to the damping circuit. At this time, people open the door manually. During the process of opening the door, the slider slides and drives the pull rod to move together. The spring is compressed; when the door is closed, the compressed spring releases the pressure and drives the slider to move back, thereby pushing the actuator shaft to rotate through the cam to realize automatic door closing. During this process, the position sensor detects the position of the spring by sensing , and select branches with different resistance values to connect to the motor according to the detected position, that is, when the door starts to close, the resistance value of the load on the motor is selected to be small, and the closing speed is fast; and the closer the door is to the fully closed position, the selected The greater the resistance value of the load on the motor, the slower the closing speed, which makes the closing speed more reasonable after being controlled and adjusted by the damping circuit, which can effectively avoid the occurrence of people being pinched due to the rapid closing of the door. To sum up, the electric door closer provided by the present invention drives the motor to generate self-generating power through the stored force of the spring compression when the door is opened when the external power supply is cut off, and controls the self-generating current that consumes the motor accordingly through the damping circuit. Realize the use of the motor to control the speed of the reduction gear set, so as to control and adjust the speed of closing the door according to the position of the door.

In the present invention, it can be further arranged that the actuator shaft is rotatably mounted on the mounting seat, an actuator gear is coaxially mounted on the actuator shaft, and the actuator gear and the motor are connected by a reduction gear set, and the actuator shaft The fixing sleeve has a cam, and the sliding block is correspondingly provided with a sliding groove for the cam to be placed in and abutting with the cam. The sliding block is fixedly installed on the sliding block bracket, and the sliding block bracket The axial limit is set on the execution shaft.

With the above structure, the motor works, and the actuator gear is driven to rotate through the reduction gear set, thereby driving the actuator shaft to rotate, and the cam pushes the slider to slide, compressing the spring; or the spring releases the compression force and drives the slider to slide, thereby passing The cam pushes the execution shaft to rotate, and drives the motor to generate electricity automatically. Such a structure arrangement can not only automatically open and close the door when the external power supply normally supplies power to the motor, but also drive the motor to generate electricity automatically after the external power supply is cut off, so as to realize the automatic closing of the door.

According to the present invention, the tie rod includes a screw rod and a rod sleeve, one end of the screw rod is fixed on the slider, the other end of the screw rod is screwed with the rod sleeve, and the washer is fixed on the rod sleeve. In this way, the axial length of the tie rod composed of the screw rod and the rod sleeve can be adjusted, so that the corresponding adjustment can be made according to the spring.

Description of drawings

Fig. 1 is the principle schematic diagram of the present invention;

Fig. 2 is the structure diagram of the present invention;

Fig. 3 is a partial structure diagram of the present invention;

Fig. 4 is the partial structure diagram of the present invention;

FIG. 5 is an exploded view of a partial structure of the present invention.

Detailed ways

As shown in Figure 1-5, an electric door closer is shown, including a mounting seat 1, a motor 2, and an execution shaft 3. The motor 2 is fixedly installed on the mounting seat 1, and a sliding block 4 is slidably arranged on the mounting seat 1. , the motor 2 and the execution shaft 3 are linked with the slider 4, the slider 4 is fixedly connected with a pull rod 5, the pull rod 5 is sleeved with a spring 6, and the spring 6 is close to the end of the slider 4 Pressed on the mounting seat 1, the pull rod 5 is fixedly sleeved with a washer 7, and the washer 7 is pressed against the end of the spring 6 away from the slider 4, and the motor 2 is provided with a damping circuit and Power detection switch 8;

The power detection switch 8 is used to detect whether the external power supply 9 is normally supplied with power, and switches the motor 2 to be connected to the external power supply 9 when the external power supply 9 is powered normally, and switches the motor 2 to connect with the external power supply 9 when the external power supply 9 is powered off. The damping circuit is connected;

Here, the main function of the power detection switch 8 is to select and switch the corresponding line by detecting whether the external power supply is normally supplied. Electronic components or circuits that can realize this function have been widely used in the prior art, so here The power detection switch 8 will not be described in detail.

The damping circuit includes a plurality of branches 10 with different resistance values. Specifically, resistors 14 of different sizes can be set on different branches 10. After the multiple branches 10 are connected in parallel, one end is connected to the motor 2, and the other end is connected to the motor 2 through a switch. 11. Keep one of the branches 10 connected with the power detection switch 8, and the switch 11 is connected with a position sensor 12 for sensing the position of the spring 6 and triggering it to perform corresponding switching.

With the above arrangement, when the external power supply 9 is normally supplied with power, the motor 2 works to drive the actuator shaft 3 to rotate through the slider 4 , thereby driving the door to automatically open and close through the connection of the connecting arm 13 . When the external power supply 9 is powered off, the motor 2 is switched to be connected to the damping circuit. At this time, people open the door manually. During the process of opening the door, the slider 4 slides and drives the pull rod 5 to move together. The washer 7 moves with the pull rod 5 While moving together, the spring 6 is compressed; when the door is closed, the compressed spring 6 releases the pressure and drives the slider 4 to move back, thereby pushing the actuator shaft 3 to rotate through the cam 17 to realize automatic door closing. , the position sensor 12 detects the position of the spring 6 through induction, and selects branches 10 with different resistance values to be connected to the motor 2 according to the detected position, that is, when the door starts to close, the resistance value of the load on the motor 2 is selected to be smaller. , the door closing speed is fast; and the closer the door is to the fully closed position, the greater the resistance value of the selected load on the motor 2, the slower the door closing speed, so that the door closing speed becomes more reasonable after being controlled and adjusted by the damping circuit, which can effectively avoid The occurrence of situations such as pinching a person due to the rapid closing of the door. To sum up, the electric door closer provided by the present invention drives the motor 2 to generate self-generating power through the compression of the spring 6 when the door is opened when the external power supply 9 is powered off, and controls the consumption of the motor 2 through the damping circuit accordingly. The self-generating current realizes the use of the motor 2 to control the speed of the reduction gear set 16, so as to control and adjust the speed of closing the door according to the different positions of the door.

The present invention can be further configured that the execution shaft 3 is rotatably mounted on the mounting base 1 , an execution gear 15 is coaxially mounted on the execution shaft 3 , and the execution gear 15 and the motor 2 are driven by a reduction gear set 16 . A cam 17 is fixedly sleeved on the actuator shaft 3, and a sliding groove 19 is correspondingly opened on the sliding block 4 for the cam 17 to be put in and abutting with the cam 17. The sliding block 4 It is fixedly installed on the slider bracket 18 , and the slider bracket 18 is axially limited and arranged on the execution shaft 3 .

With the above structure, the motor 2 works and drives the execution gear 15 to rotate through the reduction gear set 16, thereby driving the execution shaft 3 to rotate, and the cam 17 pushes the slider 4 to slide, compressing the spring 6; or the spring 6 releases the compressive force, The slider 4 is driven to slide, thereby pushing the execution shaft 3 to rotate through the cam 17, and driving the motor 2 to generate electricity by itself. Such a structure arrangement can not only automatically open and close the door when the external power supply 9 supplies power to the motor 2 normally, but also drive the motor 2 to generate electricity automatically after the external power supply 9 is powered off, so as to automatically close the door.

In the present invention, the tie rod 5 can be further provided that the tie rod 5 includes a screw rod 51 and a rod sleeve 52, one end of the screw rod 51 is fixed on the slider 4, the other end of the screw rod 51 is screwed with the rod sleeve 52, and the washer 7 is fixed on the on the rod sleeve 52. In this way, the axial length of the tie rod 5 composed of the screw rod 51 and the rod sleeve 52 can be adjusted, so that the corresponding adjustment can be made according to the spring 6 .

Claims (3)

1. An electric door closer, comprising a mounting seat, a motor, and an execution shaft, and the motor is fixedly installed on the mounting seat, and is characterized in that: the mounting seat is slidably provided with a slider, and the motor and the execution shaft are both connected with the slider. A linkage is formed, a pull rod is fixedly connected to the slider, a spring is sleeved on the pull rod, the end of the spring close to the slider is pressed against the mounting seat, a washer is fixedly sleeved on the pull rod, and the washer Pressed on the end of the spring away from the slider, the motor is provided with a damping circuit and a power detection switch; The power detection switch is used for detecting whether the external power supply is normally supplied, and switches the motor to be connected to the external power supply when the external power supply is normal, and switches the motor to be connected to the damping circuit when the external power supply is powered off; The damping circuit includes a plurality of branches with different resistance values, one end of the plurality of branches is connected in parallel with the motor, and the other end is connected to the power detection switch through a switch. The switch is connected with a position sensor for sensing the position of the spring and triggering it to perform corresponding switching. 2 . The electric door closer according to claim 1 , wherein the actuator shaft is rotatably mounted on the mounting seat, an actuator gear is coaxially mounted on the actuator shaft, and the actuator gear and the motor are arranged between the actuator gear and the motor. 3 . Through the transmission connection of the reduction gear set, a cam is fixedly sleeved on the execution shaft, and the sliding block is correspondingly provided with a sliding groove for the cam to be placed in and abutting with the cam, and the sliding block is fixedly installed It is arranged on the slider bracket, and the axial limit of the slider bracket is arranged on the execution shaft. 3. The electric door closer according to claim 1 or 2, characterized in that: the tie rod comprises a screw rod and a rod sleeve, one end of the screw rod is fixed on the slider, and the other end of the screw rod forms a threaded fit with the rod sleeve, The washer is fixed on the rod sleeve.

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