CN108011461B

CN108011461B - Low-voltage direct current motor for retractable door

Info

Publication number: CN108011461B
Application number: CN201711443772.2A
Authority: CN
Inventors: 徐新康; 徐海斌
Original assignee: ZHEJIANG WEIKANG MOTOR CO LTD
Current assignee: ZHEJIANG WEIKANG MOTOR CO LTD
Priority date: 2017-12-27
Filing date: 2017-12-27
Publication date: 2020-07-21
Anticipated expiration: 2037-12-27
Also published as: CN108011461A

Abstract

The invention discloses a low-voltage direct current motor for a retractable door, which comprises a casing (1), wherein a spindle (2) and a rotor (3) which are matched with each other are arranged in the casing (1), and a front cover (4) is also arranged on the casing (1); the rotor (3) comprises a rotating shaft (5), a rotor iron core (6) is sleeved on the rotating shaft (5), and a magnetic shoe (7) is arranged outside the rotor iron core (6); the rotor core (6) comprises a plurality of rotating sheets (601), a group of clamping grooves (602) which are uniformly distributed are formed in the outer edge surface of each rotating sheet (601), and clamping surfaces (603) of inclined structures are arranged at two ends of each clamping groove (602); the magnetic shoe (7) is positioned in the clamping groove (602). The invention has the characteristics of convenient installation and magnetic leakage reduction.

Description

Low-voltage direct current motor for retractable door

Technical Field

The invention relates to a direct current motor, in particular to a low-voltage direct current motor for a retractable door.

Background

Since most retractable doors are open air, a low-voltage direct-current motor is generally used for driving the retractable doors to ensure safety. However, the conventional direct current motor has the problems that the installation is troublesome, and the normal use of the motor is influenced due to the fact that the magnetic leakage phenomenon is generated in the running process of the motor. Therefore, the conventional techniques have problems that the mounting is troublesome and the magnetic flux leakage is easy to occur.

Disclosure of Invention

The invention aims to provide a low-voltage direct current motor for a retractable door. The invention has the characteristics of convenient installation and magnetic leakage reduction.

The technical scheme of the invention is as follows: a low-voltage direct current motor for a retractable door comprises a shell, wherein a spindle and a rotor which are matched with each other are arranged in the shell, and a front cover is also arranged on the shell; the rotor comprises a rotating shaft, a rotor iron core is sleeved on the rotating shaft, and a magnetic shoe is arranged outside the rotor iron core; the rotor iron core comprises a plurality of rotating sheets, a group of clamping grooves which are uniformly distributed are arranged on the outer edge surfaces of the rotating sheets, and clamping surfaces of inclined structures are arranged at two ends of each clamping groove; the magnetic shoe is positioned in the clamping groove.

In the low-voltage direct current motor for the retractable door, the lower end of the rotor core is flush with the bobbin, the upper end of the rotor core is higher than the upper end of the bobbin, and the distance between the upper end of the rotor core and the upper end of the bobbin is 1-3 mm.

In the aforementioned low-voltage dc motor for a retractable door, a distance between an upper end of the rotor core and an upper end of the bobbin is 2 mm.

In the aforementioned low voltage dc motor for retractable doors, the included angle between the two engaging surfaces is 16-18 degrees.

In the aforementioned low-voltage direct current motor for the retractable door, the thickness of the clamping groove is 3-5 mm.

In the low-voltage direct current motor for the retractable door, the magnetic shoe comprises a magnetic shoe body with an arc-shaped structure, inclined planes are arranged at two ends of the magnetic shoe body, an included angle between the two inclined planes is 16-18 degrees, and the thickness of the magnetic shoe body is 3-5 mm.

In the low-voltage direct current motor for the retractable door, the wire ingot is provided with an enameled wire group, and the enameled wire group is connected with a motor connecting wire group; the bobbin on still be equipped with hall subassembly, hall subassembly is connected with outer wiring group, the end that stretches out of outer wiring group is equipped with the terminal.

In the low-voltage direct current motor for the retractable door, the front cover comprises a front cover body, a clamping piece is arranged below the front cover body, a bearing installation cavity is arranged in the middle of the lower part of the front cover body, and a through hole is formed above the bearing installation cavity; the upper part of the shell is provided with a transverse thread fixing hole matched with the front cover.

In the low-voltage direct current motor for the retractable door, the lower end of the clamping piece is provided with the inclined structure, and an included angle between the inclined structure and the vertical surface of the clamping piece is 15-25 degrees.

In the low-voltage direct current motor for the retractable door, the height of the rotor core is 26.75-27.25 mm.

Compared with the prior art, the clamping grooves are formed in the outer edge surfaces of the rotating sheets, the clamping surfaces of the inclined structures are arranged at the two ends of the clamping grooves, and the magnetic tile fixing device is used for fixing the magnetic tile, so that the magnetic tile fixing device is convenient to install, high in installation precision and high in installation firmness of the magnetic tile; through the in close contact between magnetic shoe and the draw-in groove internal face, can reduce the leakage quantity in magnetic field, the joint face that the draw-in groove both ends slope was arranged can also effectually block the magnetic field and leak, and both combine to the emergence of reduction magnetic leakage phenomenon that can furthest. In conclusion, the invention has the characteristics of convenient installation and magnetic leakage reduction.

In addition, the lower end of the rotor core is flush with the spindle, and the upper end of the rotor core is 1-3mm higher than the upper end of the spindle, so that the Hall assembly can better and faster monitor related signals, the induction sensitivity of the Hall assembly is improved, and the overall operation stability and control precision of the motor are improved.

The motor connecting wire group of the enameled wire group and the external connection group of the Hall assembly are divided into two strands to be independently arranged, so that the enameled wire group is convenient to use and maintain. Simultaneously, it is fixed to mutually support through at protecgulum body and joint spare and casing to through the slope structure of joint spare lower extreme, can effectual improvement installation accuracy, also very big make things convenient for the installation of protecgulum fixed. Through set up horizontal screw thread fixed orifices on the casing for fixed and adjust the protecgulum, easy to assemble.

Drawings

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

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of the structure of the rotor;

FIG. 4 is a schematic structural view of a rotor core;

FIG. 5 is a schematic structural view of a magnetic shoe;

Fig. 6 is a schematic structural view of the front cover.

The labels in the figures are: 1-machine shell, 2-wire spindle, 3-rotor, 4-front cover, 5-rotating shaft, 6-rotor iron core, 7-magnetic shoe, 8-motor connecting wire set, 9-external connecting wire set, 10-terminal, 401-front cover body, 402-clamping piece, 403-bearing mounting cavity, 404-through hole, 405-inclined structure, 601-rotating piece, 602-clamping groove, 603-clamping surface, 701-magnetic shoe body and 702-inclined surface.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.

Examples are given. A low-voltage direct current motor for a retractable door is formed as shown in figures 1 to 6 and comprises a machine shell 1, wherein a spindle 2 and a rotor 3 which are matched with each other are arranged in the machine shell 1, and a front cover 4 is further arranged on the machine shell 1; the rotor 3 comprises a rotating shaft 5, a rotor iron core 6 is sleeved on the rotating shaft 5, and a magnetic shoe 7 is arranged outside the rotor iron core 6; the rotor core 6 comprises a plurality of rotating sheets 601, a group of clamping grooves 602 which are uniformly distributed are arranged on the outer edge surface of each rotating sheet 601, and clamping surfaces 603 of an inclined structure are arranged at two ends of each clamping groove 602; the magnetic shoe 7 is positioned in the card slot 602.

The lower end of the rotor core 6 is flush with the spindle 2, the upper end of the rotor core 6 is higher than the upper end of the spindle 2, and the distance between the upper end of the rotor core 6 and the upper end of the spindle 2 is 1-3 mm.

The distance between the upper end of the rotor iron core 6 and the upper end of the wire ingot 2 is 2 mm.

The included angle between the two clamping surfaces 603 is 16-18 degrees. The angle between the two engagement surfaces 603 is preferably 17 degrees.

The thickness of the clamping groove 602 is 3-5 mm. The thickness of the clamping groove 602 is preferably 4 mm.

The magnetic shoe 7 comprises a magnetic shoe body 701 with an arc-shaped structure, inclined planes 702 are arranged at two ends of the magnetic shoe body 701, an included angle between the two inclined planes 702 is 16-18 degrees, and the thickness of the magnetic shoe body 701 is 3-5 mm. The included angle between the two inclined surfaces 702 is preferably 17 degrees, and the thickness of the magnetic shoe body 701 is preferably 4 mm.

The wire spindle 2 is provided with an enameled wire group which is connected with a motor connecting wire group 8; the bobbin 2 is further provided with a Hall assembly, the Hall assembly is connected with an external wiring set 9, and a terminal 10 is arranged at the extending end of the external wiring set 9.

The front cover 4 comprises a front cover body 401, a clamping piece 402 is arranged below the front cover body 401, a bearing installation cavity 403 is arranged in the middle of the lower portion of the front cover body 401, and a through hole 404 is arranged above the bearing installation cavity 403; the upper part of the machine shell 1 is provided with a transverse thread fixing hole 11 matched with the front cover 4.

The lower end of the clamping piece 402 is provided with an inclined structure 405, and an included angle between the inclined structure 405 and the vertical surface of the clamping piece 402 is 15-25 degrees. The angle between the ramp 405 and the vertical surface of the snap member 402 is preferably 20 degrees.

The height of the rotor core 6 is 26.75-27.25 mm. The height of the rotor core 6 is preferably 27 mm.

And bearings are further arranged at two ends of the rotating shaft, and the two bearings are respectively fixed at the bottom of the machine shell and inside the front cover.

The rotating pieces are connected and fixed through rivets.

The mounting process of the rotor comprises the following steps: the rotor core is pressed into the rotating shaft, then appropriate anaerobic adhesive is coated on the surface of a clamping groove of the rotor core, then magnetic shoes are inserted into the clamping groove, the adjacent magnetic shoes are respectively an N pole and an S pole, and bearings are preferably pressed into two ends of the rotating shaft respectively.

The thickness of the magnetic shoe refers to the difference between the inner diameter and the outer diameter of the magnetic shoe with an arc-shaped structure.

The installation process of the invention is as follows: install in the casing with the line spindle that the winding has enameled wire group and hall subassembly earlier, then fix the bearing of rotor one end in chassis bottom, rotor core lower extreme on the rotor flushes with the line spindle lower extreme, rotor core up end height is qualified for the next round of competitions spindle up end 2mm, then press the casing with the protecgulum, make the bearing of rotor upper end be fixed in the bearing installation intracavity of protecgulum body, the rotor is located the protecgulum outside the top, wear out motor connection line group and external group respectively in two holes on the protecgulum simultaneously, it is fixed with protecgulum and casing with the bolt at last.

Claims

1. A low voltage DC motor for a retractable door, comprising: comprises a casing (1), a spindle (2) and a rotor (3) which are mutually matched are arranged in the casing (1), and a front cover (4) is also arranged on the casing (1); the rotor (3) comprises a rotating shaft (5), a rotor iron core (6) is sleeved on the rotating shaft (5), and a magnetic shoe (7) is arranged outside the rotor iron core (6); the rotor core (6) comprises a plurality of rotating sheets (601), a group of clamping grooves (602) which are uniformly distributed are formed in the outer edge surface of each rotating sheet (601), and clamping surfaces (603) of inclined structures are arranged at two ends of each clamping groove (602); the magnetic shoe (7) is positioned in the clamping groove (602); the included angle between the two clamping surfaces (603) is 16 degrees; the magnetic shoe (7) comprises a magnetic shoe body (701) with an arc-shaped structure, inclined planes (702) are arranged at two ends of the magnetic shoe body (701), an included angle between the two inclined planes (702) is 16 degrees, and the thickness of the magnetic shoe body (701) is 5 mm; the lower end of the rotor iron core (6) is flush with the spindle (2), the upper end of the rotor iron core (6) is higher than the upper end of the spindle (2), and the distance between the upper end of the rotor iron core (6) and the upper end of the spindle (2) is 2 mm; the thickness of the clamping groove (602) is 5 mm; the wire ingot (2) is provided with an enameled wire group, and the enameled wire group is connected with a motor connecting wire group (8); the bobbin (2) is also provided with a Hall assembly, the Hall assembly is connected with an external wiring group (9), and the extending end of the external wiring group (9) is provided with a terminal; the front cover (4) comprises a front cover body (401), a clamping piece (402) is arranged below the front cover body (401), a bearing installation cavity (403) is arranged in the middle of the lower portion of the front cover body (401), and a through hole (404) is arranged above the bearing installation cavity (403); the upper part of the shell (1) is provided with a transverse threaded fixing hole (11) matched with the front cover (4); an inclined structure (405) is arranged at the lower end of the clamping piece (402), and an included angle between the inclined structure (405) and the vertical surface of the clamping piece (402) is 15-25 degrees; the height of the rotor iron core (6) is 26.75-27.25 mm.