CN204732978U - An external rotor motor - Google Patents

Abstract

The utility model discloses an external rotor electric machine, including pivot, plastic envelope stator and external rotor, the plastic envelope stator outside is located to the external rotor cover, the plastic envelope stator include cover barrel seat, stator core, tip insulation, coil winding and plastic envelope body, stretch out a plurality of support arm toward the outside on the top of cover barrel seat, install the bolt on the outside end of support arm, the plastic envelope body parcel is in the outside of support arm and make the screw rod portion of bolt expose from the top surface of the plastic envelope body, this simple structure, structural strength is big, the reliability is high.

Description

An external rotor motor

Technical field:

The utility model relates to an outer rotor motor, which belongs to the technical field of motors.

Background technique:

Existing external rotor motors include a rotating shaft, a stator and an external rotor. The external rotor is sleeved outside the stator, and the stator includes a sleeve seat and a wound stator sleeved outside the sleeve base. However, the structural strength of the stator is relatively low. Prone to problems in the process, poor reliability. In order to solve this problem, some existing manufacturers have separately injected the wound stator and then set it outside the sleeve seat or integrally injected the wound stator and the sleeve seat, but the effect of this improvement is still unsatisfactory. The structural strength is still insufficient, and the outer surface of the wound stator after injection molding is smooth, difficult to install, easy to fall off when installed, and has low reliability, which cannot meet the installation and use requirements of customers.

Invention content:

The purpose of the utility model is to provide an external rotor motor with simple structure, high structural strength and high reliability.

The purpose of this utility model is achieved through the following technical solutions.

An external rotor motor, including a rotating shaft, a plastic-sealed stator and an external rotor, the external rotor is sheathed outside the plastic-sealed stator, the plastic-sealed stator includes a sleeve seat, a stator core, end insulation, coil windings and a plastic-sealed body, the end The insulation is installed on the end surface of the stator core, the coil winding is wound on the end insulation, the sleeve seat is set in the shaft hole in the middle of the stator core, and the plastic package combines the sleeve seat, the stator core, the end Insulation and coil windings are integrated into one body. There are bearing chambers at both ends of the sleeve seat respectively. Bearings are installed in the bearing chambers. The rotating shaft is located inside the sleeve seat and the two ends are respectively supported on the bearings. The middle of the cylinder base protrudes and connects with the outer rotor, and several support arms protrude outward from the top of the sleeve base. Bolts are installed on the outer ends of the support arms, and the plastic package is wrapped in the support arms. and make the screw part of the bolt exposed from the top surface of the plastic package.

The above-mentioned outer end of the support arm is provided with a positioning hole, and a bolt is nested in the positioning hole, the head of the bolt is fixed in the positioning hole by the plastic package, and the screw part of the bolt is exposed from the top surface of the plastic package.

The above-mentioned arc-shaped convex edge is arranged on the outer wall surface of the sleeve seat between the two adjacent support arms, and the arc-shaped convex edge connects the two adjacent support arms together.

A reinforcing rib is provided on the top surface of each support arm.

The above-mentioned reinforcement ribs are also arranged on the bottom surface of each support arm.

The number of the above-mentioned support arms is 4, and the 4 support arms are evenly arranged along the circumferential direction.

One end of the rotating shaft protrudes from the middle of the sleeve seat and is connected with the outer rotor, and then extends outward from the middle of the outer rotor to form a shaft extension end for connecting with a load.

Compared with the prior art, the utility model has the following effects:

1) On the top of the sleeve base, several arms are protruded outwards, bolts are installed on the outer ends of the arms, and the plastic package wraps the outside of the arms and the screw part of the bolt is separated from the plastic package. The top surface is exposed, and the structure is simple, which can effectively increase the bonding force between the sleeve seat and the plastic package, and increase its structural strength. At the same time, the outer rotor motor can be easily installed through bolts, which is convenient to use and high in reliability;

2) A positioning hole is opened on the outer end of the support arm, and a bolt is nested in the positioning hole. The head of the bolt is fixed in the positioning hole by the plastic package, and the screw part of the bolt is exposed from the top surface of the plastic package. Simple structure, convenient and reliable installation;

3) There is an arc-shaped convex edge on the outer wall surface of the sleeve seat between the two adjacent arms, and the arc-shaped convex edge connects the two adjacent arms together. The structure is simple and the structural strength is effectively increased. , to improve its reliability.

4) Reinforcing ribs are provided on the top and/or bottom of each support arm, which has a simple structure, effectively increases the structural strength, and improves its reliability.

Description of drawings:

Fig. 1 is the perspective view of outer rotor motor in the embodiment;

Fig. 2 is an exploded view of the outer rotor motor in the embodiment;

Fig. 3 is the structural representation of outer rotor motor in the embodiment;

Fig. 4 is a perspective view of the plastic-encapsulated stator in the embodiment.

Detailed ways:

The utility model will be described in further detail below through specific embodiments in conjunction with the accompanying drawings.

Embodiment 1: As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, this embodiment is an external rotor motor, including a rotating shaft 1, a plastic-sealed stator 2 and an outer rotor 3, and the outer rotor 3 is sleeved on the plastic-sealed stator 2 Outside, the plastic-sealed stator 2 includes a sleeve seat 21, a stator core 22, an end insulation 23, a coil winding 24 and a plastic enclosure 25, the end insulation 23 is installed on the end surface of the stator core 22, and the coil winding 24 is wound Manufactured on the end insulation 23, the sleeve base 21 is arranged in the shaft hole in the middle of the stator core 22, and the plastic package 25 connects the sleeve base 21, the stator core 22, the end insulation 23 and the coil winding 24 In one piece, a bearing chamber 210 is respectively opened at both ends of the sleeve seat 21, and a bearing 4 is installed in the bearing chamber 210. The rotating shaft 1 is located inside the sleeve seat 21 and the two ends are supported on the bearing 4 respectively. One end protrudes from the middle of the sleeve seat 21 and is connected with the outer rotor 3, and then extends outward from the middle of the outer rotor 3 to form a shaft extension end 11 for connecting with the load. The arm 211 has a positioning hole 2110 on the outer end of the support arm 211, and a bolt 5 is nested in the positioning hole 2110. The plastic package 25 is wrapped on the outside of the support arm 211, and the head of the bolt 5 is covered. The plastic package 25 is fixed in the positioning hole 2110 , and the screw part of the bolt 5 is exposed from the top surface of the plastic package 25 . Between two adjacent support arms 211 , an arc-shaped flange 212 is provided on the outer wall of the sleeve seat 21 , and the arc-shaped flange 212 connects the two adjacent support arms 211 together. A reinforcing rib 2111 is disposed on the top surface of each support arm 211 . A reinforcing rib 2111 is also provided on the bottom surface of each support arm 211 . The number of support arms 211 is four, and the four support arms 211 are evenly arranged along the circumferential direction.

The above embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention are equivalent All replacement methods are included within the protection scope of the present invention.

Claims (7)

1. an external rotor electric machine, comprise rotating shaft (1), plastic packaging stator (2) and external rotor (3), external rotor (3) is sheathed on plastic packaging stator (2) outside, described plastic packaging stator (2) comprises receiver (21), stator core (22), overhang insulation (23), coil windings (24) and plastic-sealed body (25), overhang insulation (23) is arranged on the end face of stator core (22), coil windings (24) is wound on overhang insulation (23), receiver (21) is arranged in the axis hole in the middle of stator core (22), plastic-sealed body (25) is described receiver (21), stator core (22), overhang insulation (23) and coil windings (24) connect to one, bearing chamber (210) is offered respectively at receiver (21) two ends, in bearing chamber (210) the inside, bearing (4) is installed, rotating shaft (1) is positioned at receiver (21) the inside and two ends are bearing on described bearing (4) respectively, rotating shaft (1) one end is stretched out and is linked together with external rotor (3) in the middle of receiver (21), it is characterized in that: on the top of receiver (21), stretch out several support arms (211) toward outside, the outboard end of support arm (211) is provided with bolt (5), plastic-sealed body (25) is wrapped in the outside of described support arm (211) and the threaded shank of bolt (5) is exposed from the end face of plastic-sealed body (25).

2. a kind of external rotor electric machine according to claim 1, it is characterized in that: in the outboard end of support arm (211), offer location hole (2110), nested bolt (5) is installed in location hole (2110) the inside, the head of bolt (5) is fixed on location hole (2110) the inside by plastic-sealed body (25), and the threaded shank of bolt (5) is exposed from the end face of plastic-sealed body (25).

3. a kind of external rotor electric machine according to claim 2, it is characterized in that: between adjacent 2 support arms (211), in the outside wall surface of receiver (21), be provided with arc chimb (212), arc chimb (212) links together adjacent 2 support arms (211).

4. a kind of external rotor electric machine according to claim 1 or 2 or 3, is characterized in that: on the end face of each support arm (211), be provided with reinforcement (2111).

5. a kind of external rotor electric machine according to claim 4, is characterized in that: on the bottom surface of each support arm (211), be also provided with reinforcement (2111).

6. a kind of external rotor electric machine according to claim 1 or 2 or 3, is characterized in that: the quantity of support arm (211) is 4, and 4 support arms (211) are circumferentially evenly arranged.

7. a kind of external rotor electric machine according to claim 1 or 2 or 3, is characterized in that: rotating shaft (1) one end extends to form axle stretch end (11) outward for being connected with load after stretching out in the middle of receiver (21) and linking together with external rotor (3) in the middle of external rotor (3).