Explosion-proof direct-current permanent magnet brushless motor

Abstract

The utility model discloses an explosion-proof direct current permanent magnet brushless motor, and relates to the technical field of explosion-proof motors, the explosion-proof direct current permanent magnet brushless motor comprises a motor casing, the inner side of the motor casing is provided with a motor stator and a motor rotor, the two ends of the motor casing are respectively fixed with an end cover and a rear cover, and the two ends of the motor rotor respectively penetrate through the end cover and the rear cover; the motor stator comprises a stator base, positioning clamping grooves are formed in the outer side of the stator base in an annular array mode, positioning strips corresponding to the positioning clamping grooves are arranged in the motor shell, and the positioning strips are connected with the positioning clamping grooves in a sliding mode. According to the utility model, after the stator seat is placed at the inner side of the motor shell, the baffle sheets are placed at the two ends of the stator seat, the baffle sheets cover the two ends of the positioning clamping groove, the axial position of the stator seat is positioned, and the stator seat does not need to be knocked and disassembled during disassembly, so that the winding on the stator seat is more convenient to replace; and meanwhile, the stator seat can be prevented from being damaged during disassembly.

Description

Technical Field

[0001] The utility model specifically relates to the technical field of explosion-proof motors, in particular to a flameproof direct current permanent magnet brushless motor. Background Art

[0002] The brushless DC permanent magnet motor is an advanced motor type. Its operating principle is to replace the brushes and commutator in traditional DC motors with an electronic commutation device, achieving brushless operation. The permanent magnets provide a constant magnetic field, which interacts with the current in the armature winding to generate torque, thereby driving the motor's rotation.

[0003] However, in practice, people have noticed that the windings of the brushless motor are installed on the stator of the motor, and then the stator is interference fit into the inside of the motor housing. When the stator is disassembled, it is necessary to fix the housing and then use a heavy object to knock the stator. During the knocking process, the stator may be damaged after being subjected to different degrees of impact force for a long time, and the entire stator needs to be replaced, resulting in high maintenance costs and long disassembly time, affecting maintenance efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a flameproof permanent magnet brushless DC motor in which the stator coil is axially positioned by positioning slots and positioning bars, and by retaining plates at both ends of the positioning slots. This facilitates disassembly of the motor stator and replacement of the stator coils, thereby resolving the technical problems raised in the above-mentioned background art.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A flameproof DC permanent magnet brushless motor comprises a motor housing, wherein a motor stator and a motor rotor are provided inside the motor housing, end covers and a rear cover are fixed to both ends of the motor housing, and both ends of the motor rotor pass through the end covers and the rear cover respectively;

[0007] The motor stator includes a stator seat, the outer side of the stator seat is provided with positioning slots in a circular array, and a positioning strip corresponding to the positioning slot is provided in the motor housing. The positioning strip is slidably connected to the positioning slot, and the inner side of the stator seat is provided with winding grooves in a circular array.

[0008] As a further technical solution of the present invention, both ends of each positioning slot are provided with blocking pieces, which are screwed to both ends of the stator seat.

[0009] As a further technical solution of the present invention, the motor rotor includes an output shaft, the two ends of the output shaft respectively pass through the end cover and the rear cover, and both ends of the output shaft are interference fit with bearings, and the outer rings of the bearings are interference fit with the end cover and the rear cover respectively.

[0010] As a further technical solution of the present invention, the output shaft is further fixedly connected with a permanent magnet, and the permanent magnet is located between the two bearings, and the stator seat is sleeved on the outside of the permanent magnet.

[0011] As a further technical solution of the present invention, a junction box is further fixed on the motor housing, an opening is provided at the inner bottom of the junction box, and a through hole corresponding to the opening is provided on the motor housing.

[0012] As a further technical solution of the present invention, a fan blade is fixed to the end of the output shaft, and the fan blade is located on the side of the rear cover away from the motor housing.

[0013] As a further technical solution of the present invention, a shield is provided on the outside of the fan blade, the shield is sleeved on the end of the motor housing, and the shield is screwed to a screw seat integrally provided on the motor housing.

[0014] As a further technical solution of the present invention, the bottom of the motor housing is integrally provided with bolt seats arranged in a rectangular array, and the bolt seats are provided with threaded holes.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model winds the winding into the winding slot on the stator seat, then puts the stator seat in, and makes the positioning slot on the stator seat slide and cooperate with the positioning bar to perform circumferential positioning of the stator seat, and makes it convenient for workers to disassemble the stator seat, thus shortening the time consumption during disassembly;

[0017] According to the utility model, after the stator base is placed inside the motor housing, blocking pieces are placed at both ends of the stator base, and the blocking pieces cover the two ends of the positioning slots to position the axial position of the stator base. In addition, the stator base does not need to be knocked and disassembled during disassembly, thereby making it more convenient to replace the winding on the stator base and preventing the stator base from being damaged during disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model in use state.

[0019] Figure 2 This utility model Figure 1 Schematic diagram of the bottom structure.

[0020] Figure 3 This utility model Figure 1 Schematic diagram of the internal structure.

[0021] Figure 4 This utility model Figure 3 Another perspective of the picture.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the motor housing in the utility model.

[0023] Figure 6 This utility model Figure 5 A partial enlarged schematic diagram.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the motor stator in the utility model.

[0025] Figure 8 This utility model Figure 7 A partial enlarged schematic diagram.

[0026] Figure 9 It is a schematic diagram of the three-dimensional structure of the motor rotor in the utility model.

[0027] In the picture:

[0028] Motor housing 1, junction box 2, end cover 3, protective cover 4, motor rotor 5, output shaft 51, bearing 52, permanent magnet 53, bolt seat 6, motor stator 7, stator seat 71, positioning slot 72, baffle 73, winding slot 74, fan blade 8, rear cover 9, positioning strip 10, screw seat 11. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figure 1-9 The embodiment of the utility model provides a flameproof DC permanent magnet brushless motor, comprising a motor housing 1, a motor stator 7 and a motor rotor 5 are provided on the inner side of the motor housing 1, an end cover 3 and a rear cover 9 are fixed to the two ends of the motor housing 1, and the two ends of the motor rotor 5 pass through the end cover 3 and the rear cover 9 respectively;

[0031] The motor stator 7 includes a stator seat 71, and the outer side of the stator seat 71 is provided with positioning slots 72 in a circular array, and a positioning bar 10 corresponding to the positioning slot 72 is provided in the motor housing 1. The positioning bar 10 is slidably connected to the positioning slot 72, and the inner side of the stator seat 71 is provided with winding grooves 74 in a circular array.

[0032] In this embodiment, each of the positioning slots 72 is provided with a blocking piece 73 at both ends, and the blocking piece 73 is screwed to the two ends of the stator seat 71. The blocking piece 73 blocks the two ends of the positioning slot 72, thereby axially positioning the motor stator 7.

[0033] In this embodiment, the motor rotor 5 includes an output shaft 51, the two ends of the output shaft 51 respectively pass through the end cover 3 and the rear cover 9, and both ends of the output shaft 51 are interference fit with bearings 52, the outer rings of the bearings 52 are interference fit with the end cover 3 and the rear cover 9 respectively, the bearings 52 support the two ends of the output shaft 51, and the output shaft 51 can drive the permanent magnet 533 to rotate on the inner side of the stator seat 71.

[0034] In this embodiment, the output shaft 51 is further fixedly connected with a permanent magnet 533 , and the permanent magnet 533 is located between the two bearings 52 , and the stator seat 71 is sleeved on the outside of the permanent magnet 53 .

[0035] In this embodiment, a junction box 2 is further fixed on the motor housing 1 . An opening is provided at the inner bottom of the junction box 2 , and a through hole corresponding to the opening is provided on the motor housing 1 .

[0036] In this embodiment, a fan blade 8 is fixed to the end of the output shaft 51 , and the fan blade 8 is located on the side of the rear cover 9 away from the motor housing 1 .

[0037] In this embodiment, a shield 4 is provided on the outer side of the fan blade 8 , the shield 4 is sleeved on the end of the motor housing 1 , and the shield 4 is screwed to a screw seat 11 integrally provided on the motor housing 1 .

[0038] In this embodiment, the bottom of the motor housing 1 is integrally provided with bolt seats 6 arranged in a rectangular array, and the bolt seats 6 are provided with threaded holes.

[0039] By adopting the above technical solution, when disassembling the motor stator 7, first remove the end cover 3 and the rear cover 9 from both ends of the motor housing 1 respectively, and then remove the blocking piece 73 at either end of the stator seat 71. Since the blocking piece 73 and the stator seat 71 are connected by screws, it is only necessary to remove the screws, and then slide the stator seat 71 to one side to remove the motor stator 7 from the inner side of the motor housing 1. There is no need to knock on the motor housing 1, which shortens the time consumed in disassembling the motor housing 1, making it convenient for the staff to replace the winding inside the winding slot 74.

[0040] In this embodiment, the end cover 3 and the rear cover 9 are respectively inserted into the two ends of the motor housing 1, and the end cover 3 and the rear cover 9 are bolted to the motor housing 1 after being fitted therewith. The motor rotor 5 is supported by the end cover 3 and the rear cover 9 so that the motor rotor 5 is suspended in the motor stator 7.

[0041] In this embodiment, the end cover 3 and the rear cover 9 are respectively provided with fixing grooves for clamping the bearing 52 on the side close to the motor housing 1, and the bearing 52 is located on the inner side of the fixing groove, and the output shaft 51 on the bearing 52 is supported by the fixing groove.

[0042] The working principle of the utility model is: when in use, first remove the screws at the connection between the shield 4 and the screw seat 11, remove the shield 4 from the end of the motor housing 1, then remove the bolts on the end cover 3 and the rear cover 9, and remove the end cover 3 and the rear cover 9 from both ends of the motor housing 1, then remove the screws on the baffle 73 on either side, and disassemble the baffle 73, so as to facilitate the staff to disassemble and maintain the motor stator 7; the structure is simple, the operation is very convenient, and the labor intensity is effectively reduced.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0044] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A flameproof permanent magnet brushless DC motor, characterized in that: The motor housing (1) comprises a motor stator (7) and a motor rotor (5) provided on the inner side of the motor housing (1), an end cover (3) and a rear cover (9) being fixed to both ends of the motor housing (1), and both ends of the motor rotor (5) respectively pass through the end cover (3) and the rear cover (9); The motor stator (7) includes a stator seat (71), the outer side of the stator seat (71) is provided with positioning slots (72) in an annular array, and a positioning bar (10) corresponding to the positioning slots (72) is provided in the motor housing (1), the positioning bar (10) is slidably connected to the positioning slots (72), and the inner side of the stator seat (71) is provided with winding grooves (74) in an annular array.

2. The flameproof permanent magnet brushless DC motor according to claim 1, characterized in that: Each of the positioning slots (72) is provided with a baffle (73) at both ends, and the baffle (73) is screw-connected to both ends of the stator seat (71).

3. The flameproof permanent magnet brushless DC motor according to claim 1, characterized in that: The motor rotor (5) includes an output shaft (51), both ends of the output shaft (51) respectively pass through the end cover (3) and the rear cover (9), and both ends of the output shaft (51) are interference-fitted with bearings (52), and the outer rings of the bearings (52) are interference-fitted with the end cover (3) and the rear cover (9).

4. The flameproof permanent magnet brushless DC motor according to claim 3, characterized in that: The output shaft (51) is also fixedly connected to a permanent magnet (53), and the permanent magnet (53) is located between the two bearings (52), and the stator seat (71) is sleeved on the outside of the permanent magnet (53).

5. The flameproof permanent magnet brushless DC motor according to claim 1, characterized in that: A junction box (2) is also fixed to the motor housing (1), an opening is provided at the inner bottom of the junction box (2), and a through hole corresponding to the opening is provided on the motor housing (1).

6. The flameproof permanent magnet brushless DC motor according to claim 3, characterized in that: A fan blade (8) is fixed to the end of the output shaft (51), and the fan blade (8) is located on a side of the rear cover (9) away from the motor housing (1).

7. The flameproof permanent magnet brushless DC motor according to claim 1, characterized in that: A shield (4) is provided on the outer side of the fan blade (8), the shield (4) is sleeved on the end of the motor housing (1), and the shield (4) is screw-connected to a screw seat (11) integrally provided on the motor housing (1).

8. The flameproof permanent magnet brushless DC motor according to claim 1, characterized in that: The bottom of the motor housing (1) is integrally provided with bolt seats (6) arranged in a rectangular array, and the bolt seats (6) are provided with threaded holes.

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