Motor of electric clothes hanger

Abstract

The utility model discloses an electric clothes hanger motor, which comprises a shell, a stator, a rotor, an output shaft and a transmission mechanism, the stator, the rotor and the output shaft are arranged in the shell, the transmission mechanism is arranged at one end of the output shaft, and the rotor is arranged on the outer surface of the output shaft. The inner side of the iron core of the stator is divided into a plurality of inner side parts by a plurality of communicating parts, the circle center C of the circle where the outer edges of the inner side parts are located is located in the gap between the rotor and the stator, connecting lines between the outer edges of all the inner side parts form an irregular eccentric circle, and the outer edges of magnetic steel on the surface of the rotor are not concentric with the circle where the rotor is located. According to the design, torque pulsation can be restrained, speed fluctuation, vibration and noise during low-speed operation can be reduced, noise and abrasion of worm gear and worm transmission can be effectively reduced in cooperation with the design of a transmission mechanism, motor operation is more stable, and the service life of the motor is prolonged. Therefore, the winding wheel can wind and unwind the steel wire rope.

Description

Technical Field

[0001] The utility model relates to the technical field of electricity, in particular to an electric drying rack motor. Background Art

[0002] The electric drying rack motor comprises a housing, a motor shaft arranged inside the housing. The motor shaft is a worm, and both sides of the worm are provided with worm wheels used for connecting with a wire winding wheel. The worm drives the worm wheels to rotate, and then drives the wire winding wheel to rotate. The wire winding wheel winds and unwinds the pull rope wound thereon, so that the drying rod can be raised and lowered.

[0003] The prior art CN 220210172 U discloses an electric drying rack motor, which solves the problem that the motor shaft will move axially during rotation. The characteristics are as follows: a connecting shaft is arranged at the top of the motor shaft, a bearing used for cooperating with the connecting shaft is arranged inside the housing, a ball is arranged at the top of the connecting shaft, a limiting member used for contacting with the ball is arranged inside the housing, and a top block used for contacting with the bottom surface of the housing is arranged at the bottom surface of the motor shaft. The motor shaft is limited axially by the contact between the top block and the bottom surface of the housing and the contact between the limiting member and the ball, the axial clearance of the motor shaft is eliminated, the motor shaft is prevented from moving axially, and the stable operation of the motor is ensured while the noise is reduced.

[0004] Although the above prior art solves the problems of the axial movement of the motor shaft and the resulting noise, the friction transmission characteristics between the worm and the worm wheel still generate relatively large noise during the transmission process.

[0005] Therefore, it is necessary to provide an electric drying rack motor to solve the above technical problems. Summary of the Invention

[0006] The utility model overcomes the deficiencies of the prior art and provides an electric drying rack motor.

[0007] To achieve the above purpose, the technical scheme adopted by the utility model is as follows: an electric drying rack motor, comprising: a housing, a stator, a rotor and an output shaft arranged inside the housing, and a transmission mechanism arranged at one end of the output shaft, wherein the rotor is arranged on the outer surface of the output shaft;

[0008] The stator comprises: a plurality of iron cores, and windings arranged on the iron cores; the plurality of iron cores are stacked axially along the output shaft, a plurality of wire grooves are arranged inside the iron cores, and the windings are arranged in the wire grooves;

[0009] The rotor is arranged at the center of the stator and is concentrically arranged therewith; the rotor is circular, and a plurality of bumps are arranged on the circumferential surface of the rotor. An installation groove is arranged between two adjacent bumps, and a magnet is arranged in the installation groove. The distance between the center B of the circle where the outer edge of the magnet is located and the center A of the circle where the rotor is located is 2 to 2.1 mm;

[0010] The transmission mechanism includes: a worm, and a plurality of worm wheels arranged on both sides of the worm; the worm is arranged at one end of the output shaft, and the worm wheel includes: a main body, and a buffer portion arranged on the outer surface of the main body; the main body is made of metal, and the buffer portion is made of plastic; a wire winding wheel is arranged on one side of the worm wheel.

[0011] In a preferred embodiment of the present invention, the outer surface of the output shaft is rotatably connected to the side wall of the housing through a bearing. The worm is coaxially arranged with the output shaft, and the other end of the worm is rotatably connected to the side wall of the housing through a bearing.

[0012] In a preferred embodiment of the present invention, the shape of the iron core is a sheet-shaped ring, and the outer diameter of the iron core is 34 to 38 mm.

[0013] In a preferred embodiment of the present invention, a plurality of wire grooves are circumferentially and arrayedly distributed around the center of the iron core, and the wire grooves are all in a flared structure with a smaller inner diameter and a larger outer diameter. The outer bottom of the wire groove is arc-shaped and has a diameter of 30 to 34 mm.

[0014] In a preferred embodiment of the present invention, a communication portion is provided on one side of the wire groove close to the rotor, and the width of the communication portion is 3 to 4 mm; the inner side of the iron core is separated into a plurality of inner portions by a plurality of the communication portions. The center C of the circle where the outer edge of the inner portion is located is in the gap between the rotor and the stator, and the connection lines between the outer edges of all the inner portions form an irregular eccentric circle.

[0015] In a preferred embodiment of the present invention, the number of the wire grooves is 6, and the wall thickness between two adjacent wire grooves is 3 to 4 mm.

[0016] In a preferred embodiment of the present invention, the bump is in a dovetail shape, and a plurality of the bumps are annularly and arrayedly distributed according to the center of the rotor.

[0017] In a preferred embodiment of the present invention, the number of the bumps is 4, and the distance from the vertex of the bump to the inner edge of the iron core is 2 to 3 mm.

[0018] In a preferred embodiment of the present invention, the depth of the air groove is 0.5 to 0.7 mm, and the width is 0.7 to 0.9 mm.

[0019] In a preferred embodiment of the present utility model, the bottom of the installation groove is arc-shaped, and the diameter of the circle where the bottom of the groove is located is 13 - 14 mm.

[0020] In a preferred embodiment of the present utility model, air grooves are provided at both ends of the bottom of the installation groove.

[0021] In a preferred embodiment of the present utility model, the buffer part is an integral tooth-shaped structure and is sleeved on the outer surface of the main body.

[0022] The present utility model solves the defects existing in the background technology, and the present utility model has the following beneficial effects:

[0023] (1) The present utility model provides an electric drying rack motor. The stator and the rotor drive the output shaft to rotate, drive the worm to rotate in the housing, and then drive the two side worm wheels meshed with it to rotate, and then drive the wire winding wheel to rotate. The wire winding wheel winds and releases the pulling rope wound thereon, so that the drying rod can rise and fall. By arranging a buffer part on the surface of the worm wheel, the buffer part is made of plastic with an integral tooth-shaped structure. When meshing and driving with the worm, it can effectively reduce the noise and wear of the worm and worm wheel transmission. And the main body of the worm wheel still uses a metal material, which can ensure its stable connection with the rotating shaft, ensure the stability of the worm wheel rotation, and then ensure the winding and unwinding of the steel wire rope by the wire winding wheel.

[0024] (2) The inner side of the iron core of the stator of the present utility model is divided into several inner parts by several communicating parts. The center C of the circle where the outer edge of the inner part is located is in the gap between the rotor and the stator. The connection lines between the outer edges of all inner parts form an irregular eccentric circle, and the outer edge of the magnetic steel on the surface of the rotor is not concentric with the circle where the rotor is located, that is, the connection lines between the outer edges of the magnetic steel on the surface of the rotor form a gradually changing outer circle shape. The two cooperate with each other to form an eccentric structure. This design can suppress torque pulsation, reduce speed fluctuation, vibration and noise during low-speed operation, and make the motor operation more stable.

[0025] (3) The present utility model is provided with a communicating part on the iron core to communicate the wire groove with the rotating space of the rotor, and an installation groove for installing the magnetic steel is provided on the circumferential surface of the rotor. The installation groove exposes the magnetic steel outside, which can improve the heat dissipation effect of the stator and rotor assembly. And the convex blocks between the installation grooves are in a dovetail shape, and the magnetic steels are independently clamped between them to reduce heat accumulation.

[0026] (4) The present utility model is provided with air grooves at both ends of the bottom of the installation groove, so that the surface of the magnetic steel installed therein is completely attached to the installation groove. Air circulates in the air grooves, which can improve the heat dissipation effect on the magnetic steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present utility model will be further described below in conjunction with the drawings and embodiments;

[0028] Figure 1 is a sectional view structure diagram of a preferred embodiment of the present utility model;

[0029] Figure 2 is a three-dimensional structure diagram of a worm gear of a preferred embodiment of the present utility model;

[0030] Figure 3 is a structure diagram of a stator and a rotor of a preferred embodiment of the present utility model;

[0031] Figure 4 is a structure diagram of a stator and a rotor of a preferred embodiment of the present utility model;

[0032] Figure 5 is a schematic diagram of the center positions of the stator and the rotor of a preferred embodiment of the present utility model.

[0033] In the figure: 100, housing; 200, stator; 210, iron core; 220, winding; 230, wire groove; 240, connecting part; 250, inner part; 300, rotor; 310, bump; 320, mounting groove; 330, permanent magnet; 340, air groove; 400, output shaft; 500, worm; 600, worm gear; 610, main body; 620, buffer part; 700, wire reel. Detailed implementation manners

[0034] Now, the present utility model will be further described in detail with reference to the accompanying drawings and embodiments. These drawings are all simplified schematic diagrams, only schematically showing the basic structure of the present utility model, so they only show the components related to the present utility model.

[0035] As Figure 1 shown, an electric drying rack motor includes: a housing 100, a stator 200, a rotor 300 and an output shaft 400 disposed inside the housing 100, and a transmission mechanism disposed at one end of the output shaft 400. The rotor 300 is disposed on the outer surface of the output shaft 400. It should be noted that the remaining auxiliary mechanisms of the motor, such as the fan, the junction box, the cooling system, and the encoder, are all prior arts and will not be elaborated here too much.

[0036] As Figure 2 shown, the transmission mechanism includes: a worm 500, and a plurality of worm gears 600 disposed on both sides of the worm 500; the worm 500 is disposed at one end of the output shaft 400. The worm gear 600 includes: a main body 610, and a buffer part 620 disposed on the outer surface of the main body 610; the main body 610 is made of metal, and the buffer part 620 is made of plastic; a wire reel 700 is disposed on one side of the worm gear 600.

[0037] The buffer part 620 in this embodiment is of an integral tooth-shaped structure and is sleeved on the outer surface of the main body 610. The buffer part 620 is preferably made of polyoxymethylene material. The main body 610 is made of metal, such as iron, stainless steel, gray cast iron, aluminum bronze alloy, tin bronze alloy, and microcrystalline alloy. Micro teeth are provided on the circumferential surface of the main body 610, and the buffer part 620 is sleeved on the surface of the main body 610, and the micro teeth provide support for the buffer part 620.

[0038] In this embodiment, the outer surface of the output shaft 400 is rotatably connected to the side wall of the housing 100 through a bearing. The worm 500 is coaxially arranged with the output shaft 400, and the other end of the worm 500 is rotatably connected to the side wall of the housing 100 through a bearing.

[0039] The present utility model provides an electric drying rack motor. The stator 200 and the rotor 300 drive the output shaft 400 to rotate, drive the worm 500 to rotate in the housing 100, and then drive the two side worm wheels 600 meshed therewith to rotate, and then drive the wire reel 700 to rotate. The wire reel 700 winds and unwinds the pulling rope wound thereon, so that the drying rod can be raised and lowered. By providing a buffer part 620 on the surface of the worm wheel 600, and the buffer part 620 is made of plastic with an integral tooth-shaped structure, when meshing and driving with the worm 500, it can effectively reduce the noise and wear of the transmission between the worm wheel 600 and the worm 500, and the main body 610 of the worm wheel 600 still uses a metal material, which can ensure its stable connection with the rotating shaft, ensure the stability of the rotation of the worm wheel 600, and further ensure the winding and unwinding of the steel wire rope by the wire reel 700.

[0040] As Figure 3 and Figure 5 shown, the stator 200 includes: a plurality of iron cores 210, and windings 220 arranged on the iron cores 210; the plurality of iron cores 210 are stacked axially along the output shaft 400, and a plurality of wire grooves 230 are provided inside the iron cores 210, and the windings 220 are arranged in the wire grooves 230; the inner diameter of the iron cores 210 is an irregular eccentric circular structure; the shape of the iron cores 210 is a sheet-shaped ring, and the outer diameter of the iron cores 210 is 34 - 38 mm; the plurality of wire grooves 230 are arranged in a circumferential array around the center of the iron cores 210, and the wire grooves 230 are all of a flared structure with a smaller inner and a larger outer diameter. The outer bottom of the wire grooves 230 is arc-shaped, and the diameter is 30 - 34 mm; a communication part 240 is provided on one side of the wire groove 230 close to the rotor 300, and the width of the communication part 240 is 3 - 4 mm. The setting of the communication part 240 facilitates winding and improves the heat dissipation effect at the same time. The inner side of the iron cores 210 is separated into a plurality of inner parts 250 by a plurality of communication parts 240. The center C of the circle where the outer edge of the inner part 250 is located is in the gap between the rotor 300 and the stator 200. The connection lines between the outer edges of all the inner parts 250 form an irregular eccentric circle; the number of wire grooves 230 is 6, and the wall thickness between two adjacent wire grooves 230 is 3 - 4 mm.

[0041] As Figure 4 and Figure 5 shown, the rotor 300 is arranged at the center of the stator 200 and is concentrically arranged; the rotor 300 is circular, and a plurality of convex blocks 310 are arranged on the circumferential surface of the rotor 300. An installation groove 320 is arranged between two adjacent convex blocks 310. A magnetic steel 330 is arranged in the installation groove 320. Air grooves 340 are arranged at both ends of the bottom of the installation groove 320; the distance between the center B of the circle where the outer edge of the magnetic steel 330 is located and the center A of the circle where the rotor 300 is located is 2 - 2.1 mm; the convex blocks 310 are in a dovetail shape, and a plurality of convex blocks 310 are distributed in an annular array around the center of the rotor 300; the number of convex blocks 310 is 4, and the distance from the vertex of the convex block 310 to the inner edge of the iron core 210 is 2 - 3 mm; the depth of the air groove 340 is 0.5 - 0.7 mm, and the width is 0.7 - 0.9 mm; the bottom of the installation groove 320 is in an arc shape, and the diameter of the circle where the bottom is located is 13 - 14 mm.

[0042] The inner side of the iron core 210 of the stator 200 of the present utility model is separated into a plurality of inner sides 250 by a plurality of communication parts 240. The center C of the circle where the outer edge of the inner side 250 is located is in the gap between the rotor 300 and the stator 200. The connection lines between the outer edges of all the inner sides 250 form an irregular eccentric circle, and the outer edges of the magnetic steels 330 on the surface of the rotor 300 are not concentric with the circle where the rotor 300 is located, that is, the connection lines between the outer edges of the magnetic steels 330 on the surface of the rotor 300 form a gradually changing outer circle shape. The two cooperate with each other to form an eccentric structure. This design can suppress torque pulsation, reduce speed fluctuation, vibration and noise during low-speed operation, and make the motor operation more stable.

[0043] The present utility model improves the heat dissipation effect of the stator 200 and rotor 300 components by arranging a communication part on the iron core 210 to connect the wire groove 230 with the rotation space of the rotor 300, and arranging an installation groove 320 for installing the magnetic steel 330 on the circumferential surface of the rotor 300. The installation groove 320 exposes the magnetic steel 330 outside. Moreover, the convex blocks 310 between the installation grooves 320 are in a dovetail shape, independently clamping the magnetic steels 330 and reducing heat accumulation.

[0044] When the present utility model is in use, the winding 220 of the stator 200 is energized to generate a rotating magnetic field, driving the magnetic steel 330 on the surface of the rotor 300 to rotate along with the magnetic field generated by the stator 200, driving the output shaft 400 to rotate. The output shaft 400 drives the worm 500 to rotate in the housing 100. The worm 500 drives the two side worm wheels 600 to rotate, and then drives the wire reel 700 to rotate. The wire reel 700 winds and unwinds the pulling rope wound thereon, so as to realize the rising and falling of the clothes drying rod.

[0045] Based on the inspiration of the ideal embodiments of the present utility model, through the above description, relevant personnel can completely make various changes and modifications without departing from the technical idea of the present utility model. The technical scope of the present utility model is not limited to the content in the specification, and the technical scope must be determined according to the scope of the claims.

Claims

1. An electric clothes drying rack motor, comprising: A housing (100), a stator (200), a rotor (300) and an output shaft (400) arranged inside the housing (100), and a transmission mechanism arranged at one end of the output shaft (400), wherein the rotor (300) is arranged on the outer surface of the output shaft (400); The stator (200) comprises: a plurality of iron cores (210) and windings (220) arranged on the iron cores (210); the plurality of iron cores (210) are stacked and arranged along the axial direction of the output shaft (400); a plurality of wire slots (230) are arranged on the inner side of the iron cores (210), and the windings (220) are arranged in the wire slots (230); the inner diameter of the iron core (210) is an irregular eccentric circular structure; The rotor (300) is arranged at the center of the stator (200) and is arranged concentrically; the rotor (300) is circular, and a plurality of protrusions (310) are arranged on the circumferential surface of the rotor (300), a mounting groove (320) is arranged between two adjacent protrusions (310), a magnetic steel (330) is arranged in the mounting groove (320), and the distance between the center B of the circle where the outer edge of the magnetic steel (330) is located and the center A of the circle where the rotor (300) is located is 2 to 2.1 mm; The transmission mechanism comprises: a worm (500) and a plurality of worm wheels (600) arranged on both sides of the worm (500); the worm (500) is arranged at one end of the output shaft (400), and the worm wheel (600) comprises: a main body (610) and a buffer portion (620) arranged on the outer surface of the main body (610); the main body (610) is made of metal, and the buffer portion (620) is made of plastic; a winding wheel (700) is arranged on one side of the worm wheel (600).

2. The electric clothes drying rack motor according to claim 1, characterized in that: The outer surface of the output shaft (400) is rotatably connected to the side wall of the housing (100) via a bearing, the worm (500) is coaxially arranged with the output shaft (400), and the other end of the worm (500) is rotatably connected to the side wall of the housing (100) via a bearing.

3. The electric clothes drying rack motor according to claim 1, characterized in that: The iron core (210) is in the shape of a sheet-shaped circular ring, and the outer ring diameter of the iron core (210) is 34 to 38 mm.

4. The electric clothes drying rack motor according to claim 1, characterized in that: A plurality of the wire grooves (230) are distributed in a circular array around the center of the iron core (210), and the wire grooves (230) are all of an expanded structure with a small inside and a large outside. The outer groove bottom of the wire groove (230) is in an arc shape and has a diameter of 30 to 34 mm.

5. The electric clothes drying rack motor according to claim 1, characterized in that: A connecting portion (240) is provided on one side of the wire slot (230) close to the rotor (300), and the connecting portion (240) has a width of 3 to 4 mm. The inner side of the iron core (210) is divided into a plurality of inner portions (250) by the connecting portions (240), and the center C of the circle where the outer edge of the inner portion (250) is located is located in the gap between the rotor (300) and the stator (200), and the connecting line between the outer edges of all the inner portions (250) forms an irregular eccentric circle.

6. The electric clothes drying rack motor according to claim 1, characterized in that: The number of the wire grooves (230) is 6, and the wall thickness between two adjacent wire grooves (230) is 3 to 4 mm.

7. The electric clothes drying rack motor according to claim 1, characterized in that: The convex block (310) is dovetail-shaped, and a plurality of the convex blocks (310) are distributed in a circular array around the center of the rotor (300).

8. The electric clothes drying rack motor according to claim 1, characterized in that: The number of the protrusions (310) is 4, and the distance from the vertex of the protrusion (310) to the inner edge of the iron core (210) is 2 to 3 mm.

9. The electric clothes drying rack motor according to claim 1, characterized in that: Air grooves (340) are provided at both ends of the bottom of the installation groove (320).

10. The electric clothes drying rack motor according to claim 1, characterized in that: The buffer portion (620) is an integrated tooth-shaped structure and is sleeved on the outer surface of the main body (610).

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