CN214273444U

CN214273444U - Motor brake assembly of roller shutter door

Info

Publication number: CN214273444U
Application number: CN202022692522.6U
Authority: CN
Inventors: 黄国滨
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-09-24
Anticipated expiration: 2030-11-19

Abstract

The utility model discloses a motor brake component of a roller shutter door, which comprises a chain wheel disc, a reset spring, an electromagnet member and a central shaft, wherein the chain wheel disc, the reset spring and the electromagnet member are coaxially connected in series with the central shaft, the reset spring and the chain wheel disc are in sliding connection with the central shaft, the reset spring is positioned between the electromagnet member and the chain wheel disc, and two ends of the reset spring respectively support against the electromagnet member and the chain wheel disc; the electromagnet component comprises an electromagnet, the sprocket wheel is controlled to attract or cut off towards the electromagnet through the electrification of the electromagnet, the sprocket wheel is ejected away from the electromagnet under the action of a reset spring, and an annular magnetic conduction groove body capable of accommodating the electromagnet after attraction is arranged on the end face, facing towards the electromagnet, of the sprocket wheel in an upward protruding mode. It has the following advantages: novel structure, material saving and cost reduction.

Description

Motor brake assembly of roller shutter door

Technical Field

The utility model relates to a roll up curtain door motor brake subassembly.

Background

The rolling door is a door which rotates up and down by connecting a plurality of movable door sheets in series in a fixed slideway by taking a scroll above the door as a center. The electric roller shutter door machine drives the roller of the roller shutter door through the motor, and realizes the automatic opening and closing of the roller shutter door. The electric roller shutter door machine is driven by a motor and can be driven by a chain wheel in a hand-pulling manner. Because the hand pulling drive and the motor drive are both driven by the reel, a mechanical structure capable of switching between the hand pulling drive and the motor drive is needed. When the door curtain needs to be driven to move up and down through the motor, the electromagnet is electrified to attract the chain wheel, so that the chain wheel is separated from the brake pad, and the motor drives the scroll to rotate to drive the door curtain to move up and down; when power is off, the electromagnet is powered off, the chain wheel is separated from the electromagnet and is attached to and rubbed with the motor brake pad under the action of the spring so as to prevent the reel from rotating; after power failure, the chain wheel can be driven to rotate by pulling the hand chain on the chain wheel, and the chain wheel drives the scroll to rotate by virtue of the friction force between the chain wheel and the brake pad, so as to drive the door curtain to move up and down; this switching mechanism is commonly referred to as a roller shutter motor brake assembly.

The existing motor brake assembly of the roller shutter door comprises a chain wheel disc 101, a return spring 102, an electromagnet member 103 and a central shaft 104, wherein the chain wheel disc 101, the return spring 102 and the electromagnet member 103 are coaxially arranged on the central shaft 104 in series, the return spring 102 and the chain wheel disc 101 are slidably connected with the central shaft 104, the return spring 102 is positioned between the electromagnet member 103 and the chain wheel disc 101, and two ends of the return spring respectively abut against the electromagnet member 103 and the chain wheel disc 101; the electromagnet member 103 comprises an electromagnet and a magnetic conduction groove wall 113 fixedly arranged on the periphery of the electromagnet (not shown in the figure), and the power-on of the electromagnet controls the chain wheel disc 101 to be attracted towards the electromagnet member 103 or be cut off and to be ejected away from the electromagnet member 103 under the action of the return spring 102. The market competition of each mechanism component of the roller shutter door in the current market is stronger, the manufacturing cost of the motor braking component of the existing roller shutter door is still higher, and the space for further reducing the manufacturing cost is provided by improving the structure.

SUMMERY OF THE UTILITY MODEL

The utility model provides a roll up curtain door motor brake subassembly, it has overcome in the background art current roll up curtain door motor brake subassembly higher shortcoming of cost.

The utility model provides a technical scheme that its technical problem adopted is:

the motor brake assembly of the roller shutter door comprises a chain wheel disc, a reset spring, an electromagnet member and a central shaft, wherein the chain wheel disc, the reset spring and the electromagnet member are coaxially connected with the central shaft in series, the reset spring and the chain wheel disc are in sliding connection with the central shaft, the reset spring is positioned between the electromagnet member and the chain wheel disc, and two ends of the reset spring respectively support against the electromagnet member and the chain wheel disc; the electromagnet component comprises an electromagnet, the sprocket wheel is controlled to attract or cut off the power supply towards the electromagnet through the electrification of the electromagnet, the sprocket wheel is ejected out of the electromagnet under the action of a reset spring, and an annular magnetic conduction groove body capable of accommodating the electromagnet after attraction is arranged on the end face of one end, facing the electromagnet, of the sprocket wheel.

In one embodiment: the electromagnet component also comprises a magnetic fixing piece fixedly connected with the electromagnet.

In one embodiment: the fixing piece is provided with a flat plate part arranged on the end face of one end of the electromagnet, which faces away from the chain wheel disc, and the axial end face of the magnetic conduction groove body after the chain wheel disc is attracted is matched and abutted with the plate surface of the flat plate part.

In one embodiment: the fixing piece is in a convex disc shape and comprises a flat plate part and a convex column part vertically protruding out of the flat plate part, a central hole for a central shaft to pass through is formed in the central axis of the fixing piece, and the conductive winding of the electromagnet is wound on the periphery of the convex column part.

In one embodiment: one end of the return spring is abutted against the fixing piece.

In one embodiment: the electromagnet is a solenoid electromagnet.

In one embodiment: and a limiting plug for limiting the chain wheel disc from disengaging is arranged at the tail end of one end, close to the chain wheel disc, of the central shaft.

Compared with the background technology, the technical scheme has the following advantages:

the present case roller shutter door motor brake assembly has established current magnetic conduction cell wall on the sprocket dish, has formed the magnetic conduction cell body of the present case promptly, and this brake assembly is the brake assembly of a novel structure, sparingly preparation materials, reduction in manufacturing cost.

Drawings

The present invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural view of a motor brake assembly of a conventional roll screen door as described in the background art.

Fig. 2 is an exploded schematic view of the braking assembly of the motor for a roller shutter door according to the present embodiment.

FIG. 3 is a schematic view of the structure of the braking assembly of the roller shutter motor according to this embodiment in the attraction state

Detailed Description

Referring to fig. 1 to 3, the motor braking assembly of the roller shutter door includes a sprocket wheel 1, a return spring 2, an electromagnet member 3 and a central shaft 4, wherein the sprocket wheel 1, the return spring 2 and the electromagnet member 3 are coaxially connected in series to the central shaft 4, the return spring 2 and the sprocket wheel 1 are slidably connected to the central shaft 4, the return spring 2 is located between the electromagnet member 3 and the sprocket wheel 1, and two ends of the return spring respectively abut against the electromagnet member 3 and the sprocket wheel 1; the electromagnet component 3 comprises an electromagnet 31, the power-on of the electromagnet 31 controls the chain wheel disc 1 to attract or cut off towards the electromagnet 31 and the chain wheel disc 1 is ejected away from the electromagnet 31 under the action of a return spring 2, and an annular magnetic conduction groove body 11 capable of accommodating the attracted electromagnet 31 is arranged on the end face of one end, facing the electromagnet 31, of the chain wheel disc 1 in a protruding mode. Typically, the electromagnet 31 is a solenoid type electromagnet.

The electromagnet member 3 further includes a magnetically conductive fixing member 32 fixed to the electromagnet 31. One end of the return spring 2 can abut against the fixing member 32. The fixing member 32 has a flat plate portion 321 disposed on an end surface of the electromagnet 31 opposite to the end surface of the sprocket wheel 1, and an axial end surface of the magnetic conductive slot 11 attracted by the sprocket wheel 1 is matched and abutted against a plate surface of the flat plate portion 321. The fixing member 32 is in a shape of a convex disk, and includes the flat plate portion 321 and a convex column portion (not shown in the figure) vertically protruding from the flat plate portion 321, a central hole for the central shaft 4 to pass through is formed on the central axis of the fixing member 32, and the conductive winding of the electromagnet 31 is wound around the periphery of the convex column portion.

The fixing member 32 and the magnetic conductive groove 11 are preferably cast iron or forged steel with good magnetic conductivity, and the sprocket wheel may be cast iron, aluminum die-cast or plastic injection.

In this embodiment, a limiting plug (not shown in the figure) for limiting the sprocket wheel 1 to be disengaged is disposed at the end of the central shaft 4 close to the sprocket wheel 1, and the action process of the motor braking assembly of the roller shutter door is as follows: the electromagnet component 3 is fixed, and one end of the central shaft 4 close to the electromagnet component 3 is fixed; when the electromagnet 31 is electrified, the chain wheel disc 1 slides towards the electromagnet member 3 along the central shaft 4 and is attracted with the electromagnet member 3, at the moment, the magnetic conduction groove body 11 is still used as the magnetic conduction center of the electromagnet 31, the chain wheel disc 1 is separated from a brake pad on the motor, the motor drives the reel to rotate, and the reset spring 2 stores energy; when the electromagnet 31 is powered off, the magnetism of the electromagnet component 3 disappears, the chain wheel disc 1 is separated from the electromagnet component 3 and slides along the central shaft towards the brake pad on the motor under the action of the reset force of the reset spring 2 and is in contact friction with the brake pad, so that the motor stops rotating; when the door curtain needs to go upwards under the condition of power failure, the chain on the chain wheel disc 1 can be pulled to drive the chain wheel disc 1 to rotate, and the chain wheel disc 1 drives the reel to rotate by virtue of the friction force between the chain wheel disc 1 and the brake disc.

The above description is only a preferred embodiment of the present invention, and therefore the scope of the present invention should not be limited by this description, and all equivalent changes and modifications made within the scope and the specification of the present invention should be covered by the present invention.

Claims

1. Roller shutter door motor braking subassembly, its characterized in that: the chain wheel disc, the reset spring and the electromagnet member are coaxially connected in series with the central shaft in a sliding manner, the reset spring is positioned between the electromagnet member and the chain wheel disc, and two ends of the reset spring respectively support against the electromagnet member and the chain wheel disc; the electromagnet component comprises an electromagnet, the sprocket wheel is controlled to attract or cut off the power supply towards the electromagnet through the electrification of the electromagnet, the sprocket wheel is ejected out of the electromagnet under the action of a reset spring, and an annular magnetic conduction groove body capable of accommodating the electromagnet after attraction is arranged on the end face of one end, facing the electromagnet, of the sprocket wheel.

2. The motor brake assembly for a roller shutter door of claim 1, wherein: the electromagnet component also comprises a magnetic fixing piece fixedly connected with the electromagnet.

3. The motor brake assembly for a roller shutter door of claim 2, wherein: the fixing piece is provided with a flat plate part arranged on the end face of one end of the electromagnet, which faces away from the chain wheel disc, and the axial end face of the magnetic conduction groove body after the chain wheel disc is attracted is matched and abutted with the plate surface of the flat plate part.

4. The motor brake assembly of claim 3, wherein: the fixing piece is in a convex disc shape and comprises a flat plate part and a convex column part vertically protruding out of the flat plate part, a central hole for a central shaft to pass through is formed in the central axis of the fixing piece, and the conductive winding of the electromagnet is wound on the periphery of the convex column part.

5. The motor brake assembly for a roller shutter door of claim 2, wherein: one end of the return spring is abutted against the fixing piece.

6. The motor brake assembly for a roller shutter door of claim 1, wherein: the electromagnet is a solenoid electromagnet.

7. The motor brake assembly for a roller shutter door of claim 1, wherein: and a limiting plug for limiting the chain wheel disc from disengaging is arranged at the tail end of one end, close to the chain wheel disc, of the central shaft.