Explosion-proof variable frequency brake motor

Abstract

The present invention belongs to the technical field of electric motors, and relates to an explosion-proof variable frequency brake motor, including a housing, wherein the axial front end of the housing is fastened to the front cover, the axial rear end of the housing is fastened to the rear cover, the rear cover is installed on the axial end face of the inner cylinder of the rear cover, a rotating shaft is rotatably arranged in the housing, the axial ends of the rotating shaft are respectively supported on the front cover and the rear cover, and an explosion-proof cooling fan is installed on the outer flange surface of the rear cover; a brake is installed on the rear cover, the disc of the brake is installed on the rotating shaft and rotates with the rotating shaft, a winding is arranged around the rotating shaft in the housing, a wire threading channel is provided between the winding and the housing, the lead wire of the winding is connected to the junction box, and the junction box is installed on the housing. The product of the present invention has a reasonable and ingenious structure, is easy to implement, meets the explosion-proof requirements, and is safe and reliable to use; an air passage is arranged on the rear cover of the product of the present invention, so that the explosion-proof cooling fan can effectively blow wind to the housing surface during operation to cool the fan.

Description

Technical Field

[0001] The invention belongs to the technical field of electric motors and relates to an explosion-proof variable frequency brake electric motor. Background Art

[0002] At present, the country has successively issued and updated the implementation standards for explosion-proof motors. There are also special industry standards for explosion-proof variable-frequency motors to provide guidance. However, there are not many relevant regulations for explosion-proof variable-frequency motors with brakes, and the reference materials are extremely limited. Summary of the invention

[0003] In view of the above problems, the present invention provides an explosion-proof variable frequency brake motor, which has a novel structure, meets the explosion-proof requirements, and is safe and reliable.

[0004] According to the technical solution of the present invention: an explosion-proof variable frequency brake motor, characterized in that: it includes a shell, the axial front end of the shell is fastened to the front cover, the axial rear end of the shell is fastened to the rear cover, the axial end face of the inner ring cylinder portion of the rear cover is installed with the rear cover, a rotating shaft is rotatably arranged in the shell, the axial ends of the rotating shaft are respectively supported on the front cover and the rear cover, an explosion-proof cooling fan is installed on the outer ring flange surface of the rear cover; a brake is installed on the rear cover, the brake disc is installed on the rotating shaft and rotates with the rotating shaft, a winding is arranged around the rotating shaft in the shell, a wire threading channel is opened between the winding and the shell, the lead wire of the winding is connected to the junction box, and the junction box is installed on the shell.

[0005] As a further improvement of the present invention, an annular first stop explosion-proof surface is arranged at one axial end of the rear cover, and an annular second stop explosion-proof surface is arranged at the other axial end of the rear cover, the inner diameter of the first stop explosion-proof surface is larger than the inner diameter of the second stop explosion-proof surface, and the outer ring flange is arranged on the outer surface of the first stop explosion-proof surface, wherein the first stop explosion-proof surface extends into the shell body, and the second stop explosion-proof surface extends into the rear cover.

[0006] As a further improvement of the present invention, a plurality of supports are evenly distributed in the circumferential direction of the rear cover, a first through hole and a first screw hole are respectively provided on two adjacent supports, an air passage is respectively provided between two adjacent supports, and a radial third screw hole is provided on the support corresponding to the first through hole to facilitate the installation of an explosion-proof cooling fan.

[0007] As a further improvement of the present invention, the rear cover is also provided with second screw holes evenly distributed in a circumference to facilitate the installation of the brake; the rear cover is also provided with a second through hole to facilitate the guidance of the brake lead.

[0008] The technical effects of the present invention are: the product of the present invention has a reasonable and ingenious structure, is easy to implement, meets the explosion-proof requirements, and is safe and reliable to use; an air passage is arranged on the rear cover of the product of the present invention, so that the explosion-proof cooling fan can effectively blow wind to the surface of the shell to cool the fan during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the present invention.

[0010] Figure 2 It is a schematic diagram of the structure of the rear engine cover.

[0011] Figure 3 for Figure 2 AA section view. DETAILED DESCRIPTION

[0012] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0013] Figures 1 to 3 It includes a junction box 1, a winding 2, a shell 3, a rear cover 4, a first stop flameproof surface 4-1, a second stop flameproof surface 4-2, a first through hole 4-3, a first screw hole 4-4, an air passage 4-5, a second through hole 4-6, a second screw hole 4-7, a third screw hole 4-8, a rotating shaft 5, a brake 6, a disc 6-1, a lead 6-2, a rear cover 7, an explosion-proof cooling fan 8, etc.

[0014] like Figures 1 to 3 As shown, the present invention is an explosion-proof variable frequency brake motor, comprising a shell 3, wherein the axial front end of the shell 3 is fastened to the front cover, and the axial rear end of the shell 3 is fastened to the rear cover 4, the axial end face of the inner ring cylinder portion of the rear cover 4 is installed with the rear cover 7, a rotating shaft 5 is rotatably arranged in the shell 3, the axial ends of the rotating shaft 5 are respectively supported on the front cover and the rear cover 7, and an explosion-proof cooling fan 8 is installed on the outer ring flange surface of the rear cover 4; a brake 6 is installed on the rear cover 4, a disc 6-1 of the brake 6 is installed on the rotating shaft 5 and rotates with the rotating shaft 5, a winding 2 is arranged around the rotating shaft 5 in the shell 3, a wire threading channel is opened between the winding 2 and the shell 3, the lead 6-2 of the winding 2 is connected to the junction box 1, and the junction box 1 is installed on the shell 3.

[0015] An annular first stop explosion-proof surface 4-1 is arranged at one axial end of the rear cover 4, and an annular second stop explosion-proof surface 4-2 is arranged at the other axial end of the rear cover 4, the inner diameter of the first stop explosion-proof surface 4-1 is larger than the inner diameter of the second stop explosion-proof surface 4-2, and the outer ring flange is arranged on the outer surface of the first stop explosion-proof surface 4-1, wherein the first stop explosion-proof surface 4-1 extends into the shell 3, and the second stop explosion-proof surface 4-2 extends into the rear cover 7.

[0016] A plurality of supports are evenly distributed in the circumferential direction of the rear cover 4, a first through hole 4-3 and a first screw hole 4-4 are respectively provided on two adjacent supports, an air passage 4-5 is respectively provided between two adjacent supports, and a radial third screw hole 4-8 is provided on the support corresponding to the first through hole 4-3 to facilitate the installation of the explosion-proof cooling fan 8.

[0017] The rear cover 4 is also provided with second screw holes 4-7 evenly distributed in a circumferential shape to facilitate the installation of the brake 6; the rear cover 4 is also provided with a second through hole 4-6 to facilitate the guidance of the lead wire of the brake 6.

Claims

1. An explosion-proof variable frequency brake motor, characterized in that: The invention comprises a housing (3), wherein the axial front end of the housing (3) is fastened to the front cover, the axial rear end of the housing (3) is fastened to the rear cover (4), the axial end face of the inner ring cylindrical portion of the rear cover (4) is mounted with the rear cover (7), a rotating shaft (5) is rotatably arranged in the housing (3), the axial ends of the rotating shaft (5) are respectively supported on the front cover and the rear cover (7), and an explosion-proof cooling fan (8) is mounted on the outer ring flange surface of the rear cover (4); a brake (6) is mounted on the rear cover (4), a disc (6-1) of the brake (6) is mounted on the rotating shaft (5) and rotates together with the rotating shaft (5), a winding (2) is arranged around the rotating shaft (5) in the housing (3), a wire threading channel is provided between the winding (2) and the housing (3), the lead wire (6-2) of the winding (2) is connected to the junction box (1), and the junction box (1) is mounted on the housing (3); A plurality of brackets are evenly distributed in the circumferential direction of the rear cover (4), a first through hole (4-3) and a first screw hole (4-4) are respectively provided on two adjacent brackets, an air passage (4-5) is respectively provided between two adjacent brackets, and a radial third screw hole (4-8) is provided on the bracket corresponding to the first through hole (4-3) to facilitate the installation of an explosion-proof cooling fan (8); The rear cover (4) is also provided with second screw holes (4-7) evenly distributed in a circumferential shape to facilitate installation of the brake (6); the rear cover (4) is also provided with a second through hole (4-6) to facilitate the guidance of the lead wire of the brake (6).

2. The explosion-proof variable frequency brake motor according to claim 1, characterized in that: An annular first stop flameproof surface (4-1) is provided at one axial end of the rear cover (4), and an annular second stop flameproof surface (4-2) is provided at the other axial end of the rear cover (4); the inner diameter of the first stop flameproof surface (4-1) is greater than the inner diameter of the second stop flameproof surface (4-2); an outer ring flange is provided on the outer surface of the first stop flameproof surface (4-1), wherein the first stop flameproof surface (4-1) extends into the shell (3), and the second stop flameproof surface (4-2) extends into the rear cover (7).

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