Miniature synchronous motor pole claw device

Abstract

The utility model discloses a miniature synchronous motor pole claw device, which is characterized in that an upper pole claw device and a lower pole claw device are arranged into a structure with six pairs and twelve pole claws, and the six pairs of pole claws are respectively and uniformly distributed on an upper pole claw plate and a lower pole claw plate, so that the production process of the whole device is simple, and the production cost is reduced; the large-torque pole claw is composed of an arc claw piece and an inclined claw piece, the radius of the cambered surface of the arc claw piece is 2.75 mm, the radian of the arc claw piece is 68 degrees, the length of the large-torque pole claw is set to be 10 mm, and the width of the large-torque pole claw is set to be 8.5 mm. The arc-shaped claw pieces and the inclined claw pieces of the upper pole claw and the lower pole claw are symmetrically and evenly arranged in an up-down staggered mode, and the distance between every two pole claws is 0.66 mm. The number and the shape of the pole claws are changed, so that the output torque of the miniature synchronous motor can be maximized, the rotating speed of the motor can be increased to 500 r / min when the motor is started, and the motor is stable and reliable. Therefore, the starting speed and the starting smoothness of the whole micro synchronous motor are ensured, and the structure is applied to a 34 mm micro synchronous motor.

Description

TECHNICAL FIELD

[0001] The utility model relates to a production and manufacturing technical field of micro synchronous motor, especially to a production and manufacturing technology of micro synchronous motor pole claw device. BACKGROUND

[0002] In view of the high operation stability and large overload capacity of synchronous motor, the synchronous motor as a commonly used alternating current motor is widely used in the power system of various commonly used electric appliances, especially some commonly used small household appliances basically apply to this micro synchronous motor, and the use frequency of these commonly used household appliances is relatively high, so that the starting frequency of the micro synchronous motor in the household appliance increases, and once the starting of the micro synchronous motor is not smooth, the mechanical wear of the overall motor will be increased invisibly, thereby affecting the use safety and service life of the micro motor. In order to solve the starting problem of the micro synchronous motor on the basis of ensuring the motor loading power, the applicant once improved the size and shape of the rotor outer diameter and pole claw structure of the small power micro synchronous motor product in the patent application file with the patent number "202022522637.0" and the patent name "large torque synchronous motor", on the basis of ensuring the same loading power of the synchronous motor, the outer diameter of the rotor is set to 15mm, and the number of pole claws is set to six poles (three pairs), after the shape structure of the pole claw is improved, the driving torque of the micro synchronous motor with the same loading power is greatly increased, the starting speed of the overall synchronous motor is greatly improved to 1000r / min, thereby ensuring the smooth starting of the electric appliance product using the synchronous motor.

[0003] And this kind of micro synchronous motor is only suitable for small appliances with loading power of 2-4W due to the limitation of rotor outer diameter, and in order to increase the loading power of the micro synchronous motor, the rotor outer diameter of the synchronous motor must be expanded, but in order to ensure the stable operation of the synchronous motor, the number of pole claw pairs must be increased after the rotor outer diameter is expanded, and under the condition that the number of pole claw pairs is fixed, the increase of rotor diameter will affect the starting of the motor, forming a contradictory synchronous motor internal system structure.

[0004] The outer diameter of the rotor of the micro synchronous motor in the 8W electric appliance on the market is basically about 34mm, and the number of pole claws needs to be at least sixteen poles (eight pairs) or more to start the synchronous motor. In order to increase the starting speed of the synchronous motor, the shape and size of the sixteen pole claws are designed differently, so as to produce corresponding output torque changes when the corresponding pole claws cut the magnetic lines of force in the starting process of the synchronous motor, thereby achieving the purpose of starting the motor. Even so, the output torque produced by the sixteen-pole synchronous motor when starting cannot be maximized, and the maximum speed of the rotor can only reach 375r / min, so that the starting of the synchronous motor is not very smooth, and the overall device manufacturing process of such sixteen-pole synchronous motor is relatively complex, the starting speed is small, thereby the starting is not smooth, and the safety use performance and product service life of the overall motor are affected. Practical new type content

[0005] In order to overcome the shortcomings of the prior art, the utility model provides a micro synchronous motor pole claw device which has accelerated starting speed, increased output torque and reduced manufacturing cost.

[0006] The utility model discloses a micro synchronous motor pole claw device, which comprises a micro synchronous motor with a rotor outer diameter of 34mm, a housing of the micro synchronous motor, a lower pole claw plate integrated with the housing, a coil assembly and an upper pole claw plate, six large torque lower pole claws are uniformly arranged on the periphery of the lower pole claw plate, the large torque lower pole claw is composed of a lower arc claw piece with an arc surface radius of 2.75mm and an arc angle of 68 degrees and a lower inclined claw piece, the length from the claw top of the large torque lower pole claw to the surface of the lower pole claw plate is 10mm, and the width of the large torque lower pole claw is 8.5mm, six large torque upper pole claws are uniformly arranged on the periphery of the inner circle of the center of the upper pole claw plate, the large torque upper pole claw is composed of an upper arc claw piece with an arc surface radius of 2.75mm and an arc angle of 68 degrees and an upper inclined claw piece, the length from the claw bottom of the large torque upper pole claw to the surface of the upper pole claw plate is 10mm, and the width of the large torque upper pole claw is 8.5mm, the large torque lower pole claw and the large torque upper pole claw are vertically staggered and sleeved in the cylinder wall of the inner cylinder of the coil assembly, and the distance between the upper and lower pole claws is 0.66mm.

[0007] The utility model discloses a beneficial effect is: because the utility model is in the micro synchronous motor of the rotor outer diameter 34mm, set up to be 6 pairs twelve pole claw structure of upper and lower pole claw device, and 6 pairs of pole claw are evenly distributed on the upper and lower pole claw board respectively, under the condition of guaranteeing the same micro synchronous motor load power, greatly reduce the pole claw quantity again, make the production technology simple of overall device, and production cost reduces, and the utility model discloses the upper and lower pole claw all adopts the big moment pole claw structure, and the arc claw piece and the inclined claw piece of the cambered surface radius 2.75mm, the cambered surface of 68 degrees arc claw piece and the inclined claw piece of upper and lower pole claw are up and down staggered symmetry even arrangement, and the interval between two pole claws is 0.66mm, and such pole claw structure makes the output moment of the utility model micro motor reach maximization, thus also makes the rotating speed of the utility model micro synchronous motor when starting can greatly improve to 500r / min, and the rotating speed of motor when starting accelerates and leads to the starting speed of overall motor to accelerate, thereby guaranteeing the starting speed and starting smoothness of overall micro synchronous motor. BRIEF DESCRIPTION OF DRAWINGS

[0008] The utility model is further illustrated in connection with the drawings and examples:

[0009] Figure 1 It is the utility model synchronous motor structure split schematic view;

[0010] Figure 2 It is the utility model part structure schematic view;

[0011] Figure 3 It is the utility model part structure cutaway schematic view;

[0012] Figure 4 It is the utility model part structure enlarged schematic view;

[0013] Figure 5 It is the utility model part structure schematic Figure 2 ;

[0014] Figure 6 It is the utility model part structure enlarged schematic Figure 2 ;

[0015] Figure 7 It is the utility model part structure schematic Figure 3 ;

[0016] Figure 8 It is the utility model part structure arrangement development schematic view.

[0017] Among them, the drawing: 10. motor shell;

[0018] 1. lower pole claw board;11. big moment lower pole claw;111. lower arc claw piece;112. lower inclined claw piece;

[0019] 2. coil assembly;

[0020] 3. upper pole claw plate; 31. large moment upper pole claw; 311. upper arc claw piece; 312. upper inclined claw piece. DETAILED DESCRIPTION

[0021] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , the micro synchronous motor pole claw device comprises a micro synchronous motor with an outer diameter of 34 mm, a shell 10 of the micro synchronous motor, a lower pole claw plate 1 integrated with the shell 10, a coil assembly 2, and an upper pole claw plate 3. The lower pole claw plate 1 is uniformly provided with six large moment lower pole claws 11 around the periphery. The large moment lower pole claw 11 is composed of a lower arc claw piece 111 with an arc radius of 2.75 mm and an arc angle of 68 degrees and a lower inclined claw piece 112. The length from the claw top of the large moment lower pole claw 11 to the lower pole claw plate surface is set to 10 mm, and the width of the large moment lower pole claw 11 is set to 8.5 mm. The upper pole claw plate 3 is uniformly provided with six large moment upper pole claws 31 around the inner periphery of the center. The large moment upper pole claw 31 is composed of an upper arc claw piece 311 with an arc radius of 2.75 mm and an arc angle of 68 degrees and an upper inclined claw piece 312. The length from the claw bottom of the large moment upper pole claw 31 to the upper pole claw plate surface is set to 10 mm, and the width of the large moment upper pole claw 31 is set to 8.5 mm. The large moment lower pole claw 11 and the large moment upper pole claw 31 are vertically staggered and sleeved in the inner cylindrical wall of the coil assembly 2. The distance between the upper and lower pole claws is 0.66 mm.

[0022] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8The utility model discloses a micro synchronous motor pole claw device, which belongs to the technical field of micro synchronous motor pole claw device, and relates to a micro synchronous motor pole claw device with the rotor outer diameter of 34mm, which comprises a rotor, a stator and a plurality of pole claws arranged between the rotor and the stator.

[0023] In summary, the specific embodiment of the utility model only describes one technical improvement scheme of the micro synchronous motor pole claw device with the accelerated starting speed, the increased output torque and the reduced manufacturing cost, and any other equivalent alternative technical improvement scheme is within the protection scope.

Claims

1. A pole claw device of a micro synchronous motor, comprising a micro synchronous motor with a rotor outer diameter of 34 mm, a housing (10) of the micro synchronous motor, a lower pole claw plate (1) integrated with the housing (10), a coil assembly (2) and an upper pole claw plate (3), characterized in that The periphery of the lower claw plate (1) is uniformly provided with six large moment lower claws (11), which are composed of a lower arc claw piece (111) with an arc surface radius of 2.75 mm and an arc of 68 degrees and a lower inclined claw piece (112). The length from the claw top of the large moment lower claw (11) to the lower claw plate surface is 10 mm, and the width of the large moment lower claw (11) is 8.5 mm. The inner circumferential periphery of the center of the upper claw plate (3) is uniformly provided with six large moment upper claws (31), which are composed of an upper arc claw piece (311) with an arc surface radius of 2.75 mm and an arc of 68 degrees and an upper inclined claw piece (312). The length from the claw bottom of the large moment upper claw (31) to the upper claw plate surface is 10 mm, and the width of the large moment upper claw (31) is 8.5 mm. The large moment lower claw (11) and the large moment upper claw (31) are vertically staggered and sleeved in the inner cylindrical wall of the coil holder center inner cylinder of the coil assembly (2). The spacing between the upper and lower claws is 0.66 mm.

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