CN110965887A

CN110965887A - Door opener with intelligent electronic stroke limiting function

Info

Publication number: CN110965887A
Application number: CN202010034006.6A
Authority: CN
Inventors: 张嵩岩
Original assignee: Dalian Master Door Industry Co Ltd
Current assignee: Dalian Master Door Industry Co Ltd
Priority date: 2020-01-13
Filing date: 2020-01-13
Publication date: 2020-04-07

Abstract

The invention discloses a door opening machine with intelligent electronic stroke limiting, which comprises a motor, a speed reducer, a manual clutch, a guide chain, a square wave generator, a square wave detection unit and a motor control unit, wherein the motor comprises a rotor shaft, the speed reducer comprises a worm and a worm wheel, the front end of the rotor shaft is connected with the worm, and the manual clutch is respectively connected with one end of the rotor shaft and the guide chain. The square wave generator is installed at one end of the rotor shaft, the square wave detection unit comprises double Hall detection elements and a pulse detection circuit, the double Hall detection elements are installed at non-contact adjacent positions on one side of the square wave generator, the distance between the double Hall detection elements is smaller than 3 mm, the double Hall detection elements are connected with the pulse detection circuit, the control unit comprises a single chip microcomputer and a control device, one end of the single chip microcomputer is connected with the pulse detection circuit, and the other end of the single chip microcomputer is connected with the control device. The device has the advantages of low cost, simple structure, easy assembly, high reliability and long service life, can detect the stroke when the door is opened or closed manually, and has the function of detecting and controlling resistance.

Description

Door opener with intelligent electronic stroke limiting function

Technical Field

The invention relates to a door opener, in particular to a door opener with intelligent electronic stroke limit.

Background

The travel limit of the door opening machine of an industrial sliding door, a sliding door opening machine and a commercial rolling door is usually mechanical travel limit, and part of products also adopt electronic travel limit. The outstanding shortcoming of the mechanical stroke-limited door opener is inaccurate limiting, and the limiting stroke error is larger and larger along with the prolonging of the service time. The door opener adopting worm gear and worm for speed reduction mainly adopts coded disc coding type or single-stage Hall element detection type electronic type stroke limit. The coded disc coding type is adopted, electromechanical combination is needed, the photoelectric coupler is used for detecting square wave signals, the mechanical structure is complex and precise, the manufacturing cost is high, and the photoelectric coupler is easy to generate detection error conditions after being covered by dust along with the lengthening of the service life, so that the limit is out of control. The single-stage Hall element detection mode is adopted, the door is opened and closed manually under the condition of power, the door opening machine cannot identify the stroke of the door, and the stroke limit is inaccurate.

Disclosure of Invention

The invention aims to provide the electronic stroke limiting door opener which has the advantages of low cost, simple structure, easy assembly, high reliability and long service life, can detect the stroke during manual opening/closing and has the function of detecting and controlling resistance, and overcomes the defects of the prior art.

The invention relates to a door opener with intelligent electronic stroke limit, which comprises a motor, a speed reducer, a manual clutch and a guide chain, wherein the motor comprises a rotor shaft, the speed reducer comprises a worm and a worm wheel, the front end of the rotor shaft is connected with the worm, the manual clutch is respectively connected with one end of the rotor shaft and the guide chain, the door opener also comprises a square wave generator, a square wave detection unit and a motor control unit, the square wave generator is arranged at one end of the rotor shaft, the square wave detection unit comprises a double-Hall detection element and a pulse detection circuit, the double-Hall detection element is arranged at the non-contact adjacent position of one side of the square wave generator, the distance between the double-Hall detection element and the pulse detection circuit is less than 3 mm, the double-Hall detection element is connected with the pulse detection circuit, the control unit comprises a single chip microcomputer and a control device, one end of the, the other end is connected with the control device.

Further, the motor is specifically a direct current motor, the worm and the worm wheel are of a first-stage speed reduction structure, the second-stage speed reduction structure of the speed reduction device is a driving gear mounted on a worm wheel shaft and a driven gear meshed with the driving gear, and the square wave generator is mounted at the front end of the rotor shaft.

Further, the motor is specifically an alternating current motor, and the square wave generator is installed at the rear end of the rotor shaft.

Further, the square wave generator is a magnetic ring with an NS pole.

Furthermore, the number of poles of the magnetic ring is 1-5.

The invention has the beneficial effects that: the square wave detection unit of the door opening machine detects pulse information through the double Hall detection elements, the pulse information is transmitted to the single chip microcomputer through the pulse detection circuit, the single chip microcomputer judges the number of running turns of the motor and the running direction of the motor through a preset logic algorithm according to the pulse information, then the moving distance is calculated, and a control command is sent to the control device, so that the electronic limiting function of opening and closing the door is achieved. When the guide chain is manually pulled to open and close the door under the condition of no power failure, the singlechip can also judge the running circle number and running direction of the rotor shaft of the motor, and the stroke of the door opener is ensured to be unchanged. Under the condition of power failure, no matter whether the door is opened or closed through a manual guide chain or not, after the power is on, the singlechip executes a door opening program until the door body reaches a full-opening position, then the singlechip automatically executes a door closing action, and when the door body reaches the door closing position and then executes electric opening or closing, the singlechip automatically executes the opening or closing action according to a preset stroke limit. In addition, when the door opener meets resistance, the pulse signal detected by the double Hall detection elements becomes weak, and the singlechip sends a control instruction to the control device according to a preset logic algorithm.

The invention adopts the double-Hall element detection type electronic stroke limiting door opener, can detect the number and direction of the rotation turns of the rotor shaft of the motor of the door opener, and can detect the number of the rotation turns of the rotor shaft caused by the rotation of the motor for manually opening and closing the door under the condition that the door opener is electrified, so that the door opener can accurately record the stroke position and ensure that the stroke is accurate and correct. The electronic stroke limiting adopts a small chip, has small volume, is combined with a singlechip circuit, and is controlled by a logic program without a complex speed reducing mechanism and parts, thereby saving the cost, saving the space of the door opener and improving the use reliability of the door opener.

Compared with the prior art, the door opening machine with the intelligent electronic stroke limit has the advantages that the detection device and the door opening machine are integrated, the stroke limit is not required to be additionally debugged and set when the door opening machine is installed, the manufacturing cost is low, the efficiency of the whole machine of the production assembly is high, the door opening machine automatically opens and closes the door after power is cut and power is supplied again, the stroke is accurate and reliable, the maintenance is easy, the setting is good, the service life is long, and the like.

Drawings

FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of embodiment 2 of the present invention;

FIG. 3 is a time differential diagram of a periodic waveform of the dual Hall sensing elements when the motor is rotating in reverse;

fig. 4 is a time difference diagram of a periodic waveform of the double hall detecting elements in the normal rotation of the motor.

Detailed Description

As shown in fig. 1: the 18 is a shell of the door opening machine, the shell 18 is fixed on a front aluminum end cover and a rear aluminum end cover 19, the motor 12 is installed in the shell 18, and the front end cover of the aluminum end cover 19 is provided with a reduction box 16. The reduction box 16 is internally provided with a first-stage worm-gear type reduction structure which comprises a worm 10 connected with an output shaft of the motor 12 and a worm wheel 11 meshed with the worm 10. The second stage gear reduction structure is a driving gear 17 mounted on the worm shaft and a driven gear 2 engaged with the driving gear 17. The rotor shaft 14 of the motor 12 is an input shaft of the first-stage worm reduction gear structure. When the door opener works, the worm 10 serves as a first power output shaft of the door opener, the first-stage speed reduction is carried out through the worm gear 11, the driving gear 17 is arranged on the shaft of the worm gear 11 and is meshed with the driven gear 2, the second-stage speed reduction is formed, the requirement that the output rotating speed of the door opener is 18-30 rpm is met, and the power output of the door opener is achieved. An output shaft 1 with a key groove is arranged in an inner hole of the driven gear 2. The rotor shaft 14 of the electric machine 12 is supported on an aluminum end cover 19 by means of a bearing 13. The shaft of the worm 10 at the front end of the motor 12 is fixedly provided with a square wave generator 4, the square wave generator 4 is a selected magnetic ring, and the number of poles of the magnetic ring is 1-5. A double-Hall detection element 5 fixing hole is formed above an end cover of the reduction gearbox 16, and the distance between the double-Hall detection element 5 and the magnetic ring is smaller than 3 mm. The double-Hall detection element 5 is connected with a pulse detection circuit 6 in the reduction gearbox 16, the pulse detection circuit 6 is connected with a singlechip 7, and the singlechip 7 is connected with a control device 8 of the motor 12. And 9 is an independent box body provided with a singlechip 7 and a control device 8. The outer side of the motor 12 is provided with a shell 18, the shell 18 is fixed with a front aluminum end cover 19 and a rear aluminum end cover 19, the rear end of the aluminum end cover 19 is fixed with a manual clutch 15, and the manual pull of the guide chain 20 drives the manual clutch 15 to open and close the door.

As shown in fig. 2: the 18 is a casing of the door opening machine, a motor 12 is fixedly arranged on the casing 18, an output shaft of the motor 12 is connected with a worm 10, the worm 10 is meshed with a worm wheel 11 to form a worm and gear type speed reducing mechanism, and an output shaft of the door opening machine is arranged in an inner hole of the worm wheel 11. After the speed is reduced by the first-stage worm gear, the requirement of 18-30 rpm of the output rotating speed of the door opener is met. In operation, the worm 10 is used as the power output shaft of the door opener. The rear end of the rotor shaft 14 of the motor 12 is supported on the housing 18 by a bearing 13. The square wave generator 4 is fixedly arranged at the rear end of a rotor shaft 14 of the motor 12, the square wave generator 4 is a selected magnetic ring, and the number of poles of the magnetic ring is 1-5. The inner side of the casing 18 is provided with a fixing plate for fixing the double Hall detection elements 5, and the distance between the double Hall detection elements 5 and the magnetic ring is less than 3 mm. The double-Hall detection element 5 is connected with a pulse detection circuit 6 in the shell 18, the pulse detection circuit 6 is connected with a singlechip 7, and the singlechip 7 is connected with a control device 8 of the motor 12. And 9 is an independent box body provided with a singlechip 7 board and a device 8. A manual clutch 15 is fixed at the rear end of the casing 18, and the manual pull of the guide chain 20 drives the manual clutch 15 to open and close the door.

As shown in fig. 3 and 4: wherein a is a periodic waveform diagram detected by a first hall detecting element in the double hall detecting elements 5, and B is a periodic waveform diagram detected by a second hall detecting element in the double hall detecting elements 5. As shown in FIGS. 1-4: the working principle of the embodiment of the invention is as follows: in the normal rotation process of the motor 12, the magnetic ring arranged on the rotor shaft 14 is close to the double Hall detection elements 5 once, two Hall detection elements of the double Hall detection elements 5 respectively send out a pulse signal, the pulse signal is transmitted to the single chip microcomputer 7 through the pulse detection circuit 6, the single chip microcomputer 7 judges the number of running circles of the motor 12 by calculating the number of pulses, the single chip microcomputer 7 distinguishes the rotation direction of the motor by detecting the starting time of the two pulse signals, namely when the starting time of the pulse signal of the first Hall detection element is earlier than the starting time of the pulse signal of the second Hall detection element, the motor 12 rotates forwards, and otherwise, the motor 12 rotates backwards. The singlechip 7 calculates the movement distance through a preset logic algorithm and sends a control command to the control device 8, thereby realizing the electronic limit function of opening and closing the door. When the guide chain 20 is manually pulled to open and close the door under the condition of no power failure, the singlechip 7 can also judge the running circle number and the running direction of the rotor shaft 14 of the motor 12, and the stroke of the door opener is ensured to be unchanged. Under the condition of power failure, no matter whether the guide chain 20 is pulled manually to open or close the door, after the power is on, the singlechip 7 executes a door opening program until the door body reaches a full-opening position, then the singlechip 7 automatically executes a door closing action, and after the door body reaches the door closing position, the singlechip 7 automatically executes the opening and closing actions according to a preset stroke limit when the door is opened or closed electrically. In addition, when the door opener meets resistance, the pulse signal detected by the double-Hall detection element 5 becomes weak, and the singlechip 7 sends a control instruction to the control device 8 according to a preset logic algorithm.

Claims

1. A door opening machine with intelligent electronic stroke limiting function comprises a motor (12), a speed reducing device, a manual clutch (15) and a guide chain (20), wherein the motor (12) comprises a rotor shaft (14), the speed reducing device comprises a worm (10) and a worm wheel (11), the front end of the rotor shaft (14) is connected with the worm (10), the manual clutch (15) is respectively connected with one end of the rotor shaft (14) and the guide chain (20), and the door opening machine is characterized in that: the door opener further comprises a square wave generator (4), a square wave detection unit and a motor control unit, wherein the square wave generator (4) is installed at one end of the rotor shaft (14), the square wave detection unit comprises two Hall detection elements (5) and a pulse detection circuit (6), the two Hall detection elements (5) are installed at non-contact adjacent positions on one side of the square wave generator (4), the distance between the adjacent positions is smaller than 3 millimeters, the two Hall detection elements (5) are connected with the pulse detection circuit (6), the control unit comprises a single chip microcomputer (7) and a control device (8), one end of the single chip microcomputer (7) is connected with the pulse detection circuit (6), and the other end of the single chip microcomputer is connected with the control device (8).

2. The door opener with intelligent electronic travel limit of claim 1, wherein: the motor (12) is specifically a direct current motor (12), the worm (10) and the worm wheel (11) are of a first-stage speed reduction structure, a second-stage speed reduction structure of the speed reduction device is a driving gear (17) mounted on a worm wheel shaft and a driven gear (2) meshed with the driving gear (17), and the square wave generator (4) is mounted at the front end of the rotor shaft (14).

3. The door opener with intelligent electronic travel limit of claim 1, wherein: the motor (12) is an alternating current motor (12), and the square wave generator (4) is installed at the rear end of the rotor shaft (14).

4. Door operator with intelligent electronic travel limit according to claim 1, 2 or 3, characterized in that: the square wave generator (4) is a magnetic ring with an NS pole.

5. The door opener with intelligent electronic travel limit of claim 4, wherein: the number of poles of the magnetic ring is 1-5.