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CN-121993004-A - Worm wheel type brushless door opener

CN121993004ACN 121993004 ACN121993004 ACN 121993004ACN-121993004-A

Abstract

The application relates to a worm-gear type brushless door opener, which relates to the technical field of door openers and comprises a shell, a motor, a worm gear transmission mechanism and an output shaft. A composite clutch mechanism is arranged between the worm wheel and the output shaft and comprises a conical clutch component and a ball clutch component which are connected in series. The drive control mechanism operates the clutched condition via the gear, rack and control. The device is characterized in that a power-off unlocking unit and an overload unlocking unit are additionally arranged, the power-off unlocking unit and the overload unlocking unit are both applied to the rack, when power is off, the electromagnet is in loss of magnetism, the reset spring pushes the rack to unlock, and when overload occurs, axial displacement generated by conical clutch slipping is amplified by the stroke amplifying assembly and then pushes the rack to unlock. The rack moves to drive the control piece to rotate, so that the sliding piece is switched to the unlocking position, the balls are disengaged, and the power is thoroughly cut off. The application realizes automatic response and unlocking to power failure and overload, stable maintenance of state and safe manual reset, and is suitable for the scene that the door body is automatically separated from the drive to facilitate manual operation when faults are needed.

Inventors

  • ZHANG ZHENHUA

Assignees

  • 杭州富阳陶门开门机有限公司

Dates

Publication Date
20260508
Application Date
20260311

Claims (10)

  1. 1. The worm wheel type brushless door opener comprises a machine shell (1), a worm wheel (13) worm (12) transmission mechanism arranged in the machine shell (1) and driven by a motor (11), and an output shaft (14) in transmission connection with the worm wheel (13), and is characterized in that a composite clutch mechanism is arranged between the worm wheel (13) and the output shaft (14), and comprises a conical clutch assembly (2) and a ball clutch assembly (3) which are arranged in series; the cone clutch assembly (2) comprises an upper cone block (21) which is axially slidably arranged on the worm wheel (13), a lower cone block (22) which is fixedly arranged on the ball clutch assembly (3), and a second elastic piece (23) which acts on the upper cone block (21) to enable the upper cone block to have a compression trend towards the lower cone block (22); The ball clutch assembly (3) comprises a clutch shaft sleeve (31) in rotating fit with the output shaft (14), and a locking mechanism (32) arranged between the output shaft (14) and the clutch shaft sleeve (31) to selectively lock the output shaft (14) and the clutch shaft sleeve (31) in the circumferential direction, and the lower conical block (22) is fixedly connected with the clutch shaft sleeve (31); The device also comprises a driving control mechanism (4) which comprises a control piece (41) rotatably arranged on the shell (1), a gear (42) fixed on the control piece (41), a rack (43) meshed with the gear (42) and capable of sliding along a straight line, and a transmission piece (44) arranged between the control piece (41) and the locking mechanism (32), wherein the locking mechanism (32) is operated by the rotation energy of the control piece (41) through the transmission piece (44) so as to switch between a locking state and an unlocking state; The automatic unlocking device is characterized by further comprising a power-off unlocking unit (5) and an overload unlocking unit (6), wherein the driving output ends of the power-off unlocking unit (5) and the overload unlocking unit (6) are both applied to a rack (43) so as to drive the rack (43) to slide when power is off or overloaded, and then the control piece (41) is driven to rotate to a position for enabling the locking mechanism (32) to be switched to an unlocking state through the gear (42).
  2. 2. The worm-gear type brushless door opener according to claim 1, wherein the locking mechanism (32) comprises a cavity (321) formed in the output shaft (14), a through hole (322) formed in the peripheral wall of the output shaft (14) and communicated with the cavity (321), balls (323) formed in the through hole (322), a concave area (324) formed in the inner wall of the clutch shaft sleeve (31) and corresponding to the balls (323), and a sliding piece (325) slidably arranged in the cavity (321), the transmission piece (44) is fixedly connected with the sliding piece (325), a first contact surface (3251) and a second contact surface (3252) are arranged on the surface of the sliding piece (325), when the first contact surface (3251) moves to one side of the balls (323), the balls (323) are pushed to partially extend into the concave area (324) to achieve circumferential locking, and when the second contact surface (3252) moves to one side of the balls (323), the balls (323) are allowed to be separated from the concave area (324) to achieve unlocking.
  3. 3. The worm-gear type brushless door opener according to claim 2, wherein the control member (41) comprises a cylindrical force application portion (411) and a contact portion (412) eccentrically arranged at the end portion of the force application portion (411), the gear (42) is sleeved on the force application portion (411), the force application portion (411) pushes the transmission member (44) to move through the contact portion (412) when rotating, and then drives the sliding member (325) to move, the driving control mechanism (4) further comprises a first elastic member (45), the first elastic member (45) acts on the sliding member (325), and one end of the sliding member (325) pushes the transmission member (44) to be always kept in contact with the contact portion (412).
  4. 4. The worm-gear type brushless door opener according to claim 1, wherein the power-off unlocking unit (5) comprises a first push rod (52) arranged on the machine shell (1) in a sliding mode, an electromagnet (51) fixedly installed on the machine shell (1), an armature (53) fixedly arranged at one end of the first push rod (52) and corresponding to the electromagnet (51), and a return spring (54) sleeved on the armature (53), the other end of the first push rod (52) is in abutting fit with the rack (43), when the electromagnet (51) is electrified, the armature (53) is adsorbed to enable the return spring (54) to be compressed, and when power-off is conducted, the return spring (54) is released to enable the first push rod (52) to push the rack (43) to slide in an unlocking direction.
  5. 5. The worm-gear type brushless door opener according to claim 1, wherein a plurality of fixing blocks (131) are circumferentially arranged at the end part of the worm gear (13), the second elastic piece (23) is arranged between the fixing blocks (131) and the end face of the upper conical block (21), a plurality of protrusions (211) are circumferentially arranged at the end part of the upper conical block (21), the protrusions (211) and the fixing blocks (131) are arranged in a staggered mode, and the end face of each protrusion (211) axially exceeds the end face of each fixing block (131).
  6. 6. The worm wheel type brushless door opener according to claim 5, wherein the overload unlocking unit (6) comprises a second push rod (61) slidably arranged on the machine shell (1), a sliding ring (62) slidably arranged on the machine shell (1) in the axial direction and abutted with a protrusion (211) of the upper conical block (21), and a stroke amplifying assembly (63), when the upper conical block (21) axially moves due to overload, the sliding ring (62) is pushed to move through the protrusion (211), and the stroke amplifying assembly (63) amplifies the displacement of the sliding ring (62) and then drives the second push rod (61) to move, and the second push rod (61) further pushes the rack (43) to slide in the unlocking direction.
  7. 7. The worm wheel type brushless door opener according to claim 6, wherein the stroke amplifying assembly (63) is a hydraulic amplifying assembly and comprises a first hydraulic cylinder (631) connected with the sliding ring (62), a second hydraulic cylinder (632) connected with the second push rod (61), and a connecting pipe (633) for communicating a rodless cavity of the first hydraulic cylinder (631) with a rodless cavity of the second hydraulic cylinder (632), wherein the effective area of a piston of the first hydraulic cylinder (631) is larger than that of a piston of the second hydraulic cylinder (632), and the first hydraulic cylinder (631) and the second hydraulic cylinder (632) are communicated with each other in an unobstructed manner through the connecting pipe (633).
  8. 8. The worm-gear type brushless door opener according to claim 7, wherein an adjusting assembly (8) is arranged at the contact end of the second push rod (61) and the rack (43), the adjusting assembly (8) is used for absorbing and adjusting the stroke difference between the second push rod (61) and the rack (43), and the adjusting assembly (8) comprises a blind hole (81) formed in the end portion of the second push rod (61), a buffer spring (82) arranged in the blind hole (81) and a push rod (83) partially extending out of the blind hole (81) and being in contact with the rack (43).
  9. 9. The worm-gear type brushless door opener according to claim 4, wherein a limiting block (7) is fixedly arranged on the machine shell (1), the limiting block (7) is located on a path of sliding of the rack (43) towards an unlocking direction and used for limiting a limiting position of the limiting block, the limiting position is configured to enable the control piece (41) to rotate to a position enabling the ball clutch assembly (3) to be in an unlocking state when the rack (43) abuts against the limiting block (7), and a permanent magnet (71) is arranged on the end face of the limiting block (7) facing the rack (43).
  10. 10. The worm-gear type brushless door opener of claim 7, wherein the sliding ring (62) is in one-way driving fit with the protrusion (211), the sliding ring (62) is reset through a manual reverse rotation force application part (411), the rack (43) is further reversely driven to slide, the sliding ring (62) is reversely pushed to slide through a stroke amplifying assembly (63), a lining plate is arranged on one side, close to the protrusion (211), of the sliding ring (62), and the lining plate is in sliding connection with the protrusion (211).

Description

Worm wheel type brushless door opener Technical Field The application relates to the technical field of door openers, in particular to a worm wheel type brushless door opener. Background Electric door openers typically employ worm and gear drive mechanisms. The mechanism is not only used for reducing speed and increasing torque, but also has the inherent reverse self-locking characteristic, so that the door body can be locked effectively when the motor is powered off, the door body is prevented from being accidentally moved due to external force, and the safety of the system is improved. This feature is a standard configuration for many door machine designs. However, this design concept mainly serves the scenario of high demands on safety locking, the core goal of which is to immediately and remain locked to the door upon power outage or failure. In contrast, in many applications such as home courtyards, indoor partitions, etc., the core requirement of the user is not to lock the door body when the power is off, but rather to automatically unlock the drive lock at this time so that the door can be easily opened and closed manually for passage, escape or maintenance. The prior art generally lacks a targeted solution to this particular need. The prior art proposes improvements with respect to the need for manual operation. For example, the reference CN116677721a discloses a manual clutch device for a door opener, which is characterized in that a sliding member and a ball structure are arranged in an output shaft, so that a user can manually rotate an external control member to separate a worm wheel from the output shaft after power failure, thereby realizing manual door opening. The scheme provides the possibility of manual operation after power failure, but the action of the scheme is completely dependent on the active discovery and manual intervention of a user, and the active response of 'power failure, namely automatic unlocking' cannot be realized. Meanwhile, when the door body is blocked by an obstacle in operation, the motor can be overloaded and blocked, and if an automatic disengaging mechanism is not provided, the motor is extremely easy to overheat and damage. For the application scenario of automatic door unlocking in expected failure, the automatic disengagement protection in overload state is important as well as the automatic power-off unlocking, but the manual clutch device in the prior art obviously cannot meet the requirement. Therefore, the existing worm-wheel type brushless door opener mainly aims at the safety scene of keeping locking during failure in transmission and clutch design, and has obvious defects when being suitable for the application of automatically unlocking during failure, namely firstly, the worm-wheel type brushless door opener can not realize automatic and instant unlocking during power failure and still needs manual operation, and secondly, the worm-wheel type brushless door opener completely lacks automatic detection and release protection functions for overload working conditions. There is a need in the market for a new intelligent driving device that can automatically respond to a dual failure of power failure and overload, actively switch the door body to a freely manually operable state, and reliably reset. Disclosure of Invention The application provides a worm wheel type brushless door opener, which aims to solve the problem that the existing manual clutch device cannot automatically respond to power failure and overload faults. The application provides a worm wheel type brushless door opener, which adopts the following technical scheme: The worm wheel type brushless door opener comprises a shell, a worm wheel and worm transmission mechanism arranged in the shell and driven by a motor, and an output shaft connected with the worm wheel in a transmission way, wherein a composite clutch mechanism is arranged between the worm wheel and the output shaft and comprises a conical clutch assembly and a ball clutch assembly which are arranged in series; the conical clutch assembly comprises an upper conical block which can be axially and slidably arranged on the worm wheel, a lower conical block which is fixedly arranged on the ball clutch assembly, a second elastic piece which acts on the upper conical block to enable the upper conical block to have a pressing trend towards the lower conical block, a clutch shaft sleeve which is in running fit with an output shaft, a locking mechanism which is arranged between the output shaft and the clutch shaft sleeve and is used for selectively locking the output shaft and the clutch shaft sleeve in the circumferential direction, a driving control mechanism which is fixedly connected with the clutch shaft sleeve, and a driving control mechanism which comprises a control piece which is rotatably arranged on the shell, a gear which is fixed on the control piece, a rack which is meshed with the gear and can slide along a straight line,