Permanent magnet type variable speed motor

Abstract

Magnetic steel surrounds the periphery of a rear rotor seat and is fixed with the rear rotor seat, one end of a transmission shaft is fixed with the rear rotor seat, a sun gear is sleeved on the transmission shaft and is fixed with the transmission shaft, and a gear ring and the rear rotor seat are fixed into a whole; the planetary gear seat surrounds the sun gear, one end of the planetary gear seat is in pivot connection with the rear rotor seat, a receding hole is formed in the circumferential surface of the planetary gear seat, the planetary gear is in pivot connection with the planetary gear seat, the planetary gear is meshed with the sun gear, and the planetary gear further penetrates through the receding hole to be meshed with the gear ring; the front rotor seat and the gear ring are fixed into a whole, the other end of the planetary gear seat is provided with an output shaft, and the output shaft penetrates through the front rotor seat and is in pivot connection with the front rotor seat. The transmission mechanism has the characteristics of high transmission efficiency and compact structure.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a permanent magnet variable speed motor. Background Technology

[0002] A permanent magnet motor is a small AC motor that uses permanent magnets to generate a magnetic field, converting electrical energy into mechanical energy. Its characteristics include high efficiency, small size, light weight, long lifespan, and low maintenance costs.

[0003] CN102227092A discloses a permanent magnet motor, which has a housing, a rotor mounted on a main shaft, and a stator fixed relative to the housing and equipped with drive coils. The rotor has one or more pairs of axially polarized permanent magnets circumferentially embedded in a non-magnetic insulating disk. The N and S polarities of adjacent permanent magnets are opposite. The stator is made of stacked sheets of magnetically conductive material. Each stator has an axial arm parallel to the main shaft. The two ends of the axial arm extend inward to both sides of the rotor disk through radial arms perpendicular to it. The inner ends of the two radial arms turn towards the rotor disk to form stator pole arms. A rotation space of the rotor disk is formed between the ends of the two stator pole arms. Stator salient poles are formed at the ends of the two stator pole arms on both sides of the rotor. The two stator salient poles are respectively facing the permanent magnets rotating into the space. A position sensor for detecting the rotation position of the rotor is installed in the housing. The position sensor is connected to the motor controller.

[0004] The aforementioned permanent magnet motors have many parts, are large in size, and have low transmission efficiency. With the rapid development of the automation field, there is a need for permanent magnet motors with higher transmission efficiency, more compact structure, smaller size, and greater output torque to meet higher application requirements. Utility Model Content

[0005] This invention provides a permanent magnet variable speed motor, which features high transmission efficiency and compact structure.

[0006] The technical solutions to the above technical problems are as follows:

[0007] A permanent magnet variable speed motor includes a stator assembly and a rotor assembly, which are connected. The rotor assembly includes a rear rotor housing, magnets, a drive shaft, a sun gear, a gear ring, a planetary gear housing, planetary gears, and a front rotor housing.

[0008] The magnets are wrapped around the rear rotor seat and fixed to the rear rotor seat. One end of the drive shaft is fixed to the rear rotor seat. The sun gear is sleeved on the drive shaft and fixed to the drive shaft. The gear ring is fixed to the rear rotor seat as a whole.

[0009] The planetary gear housing surrounds the sun gear, one end of the planetary gear housing is pivotally connected to the rear rotor housing, and a clearance hole is provided on the circumferential surface of the planetary gear housing. The planetary gear is pivotally connected to the planetary gear housing, meshes with the sun gear, and also meshes with the gear ring after passing through the clearance hole.

[0010] The front rotor housing is fixed to the gear ring as one piece, and the other end of the planetary gear housing is provided with an output shaft, which passes through the front rotor housing and is pivotally connected to the front rotor housing.

[0011] The permanent magnet variable speed motor of this invention uses permanent magnets, eliminating the need for an electric current to generate a magnetic field. This results in higher energy conversion efficiency and reduced energy consumption. Combined with the high-efficiency transmission of planetary gears and a compact structure, the overall system efficiency is further improved, and the entire system is lighter and more portable. Planetary gear transmission offers high precision and stability, providing perfect repeatability and low noise levels. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of a permanent magnet variable speed motor.

[0013] Figure 2 This is an exploded view of a permanent magnet variable speed motor.

[0014] Figure 3 This is an exploded view of the rotor assembly.

[0015] Labels in the attached diagram:

[0016] Stator assembly A, front electrode plate 1, front coil 2, intermediate electrode plate assembly 3, rear coil 4, rear electrode plate 5.

[0017] Rotor assembly B, rear rotor seat 11, movable seat 11a, fixed seat 11b, first bearing 11c, first bearing housing 11d, magnet 12, drive shaft 13, sun gear 14, gear ring 15, planetary gear housing 16, clearance hole 16a, output shaft 16b, planetary gear housing body 16c, second bearing housing 16d, planetary gear 17, pin 17a, front rotor seat 18, second bearing 19, third bearing 20, fourth bearing 21, screw C. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] like Figures 1 to 3 As shown, the permanent magnet variable speed motor of this utility model includes a stator assembly A and a rotor assembly B. The stator assembly A and the rotor assembly B are connected. The following is a detailed description of each part and the relationship between them.

[0024] Stator assembly A includes a front electrode plate 1, a front coil 2, an intermediate electrode plate assembly 3, a rear coil 4, and a rear electrode plate 5. One end of the intermediate electrode plate assembly 3 mates with the front electrode plate 1, forming a first annular cavity between the intermediate electrode plate assembly 3 and the front electrode plate 1. The front coil 2 is located within the first annular cavity. The other end of the intermediate electrode plate assembly 3 mates with the rear electrode plate 5, forming a second annular cavity between the intermediate electrode plate assembly 3 and the rear electrode plate 5. The rear coil 4 is located within the second annular cavity. The intermediate electrode plate assembly 3 is also fixed to both the front electrode plate 1 and the rear electrode plate 5.

[0025] The rotor assembly B includes a rear rotor seat 11, a magnet 12, a drive shaft 13, a sun gear 14, a gear ring 15, a planetary gear seat 16, planetary gears 17, and a front rotor seat 18. The magnet 12 surrounds the rear rotor seat 11 and is fixed to the rear rotor seat 11. One end of the drive shaft 13 is fixed to the rear rotor seat 11. The sun gear 14 is sleeved on the drive shaft 13 and fixed to the drive shaft 13. The gear ring 15 is fixed to the rear rotor seat 11.

[0026] The rear rotor seat 11 includes a movable seat 11a, a fixed seat 11b, and a first bearing 11c. The movable seat 11a includes a base plate and a ring fixed to the base plate, and the magnet 12 is fixed to the ring. A first receiving cavity is formed between the base plate and the ring, and the fixed seat 11b is located in the first receiving cavity. The fixed seat 11b consists of a first base plate and a first ring, and the first ring is fixed to the first base plate.

[0027] One end of the drive shaft 13 is fixed to the movable seat 11a. The base plate in the movable seat 11a is provided with a mounting hole. After the drive shaft 13 is clearance-fitted with the mounting hole on the base plate, the drive shaft 13 is fixed to the base plate by welding. The fixed seat 11b is provided with a first bearing seat 11d. The first bearing seat 11d is provided with a stepped hole. The first bearing 11c is located in the first bearing seat 11d and is fixed to the first bearing seat 11d. The other end of the drive shaft 13 passes through the first bearing 11c and is fixed to the first bearing 11c. The first bearing 11c provides support for the drive shaft 13.

[0028] The rotor assembly B also includes a fourth bearing 21. The planetary gear housing 16 is composed of a planetary gear housing body 16c and a second bearing housing 16d. One end of the second bearing housing 16d is fixed to the planetary gear housing body 16c, and the other end of the second bearing housing 16d is fixed to the output shaft 16b. The fourth bearing 21 is fixed to the second bearing housing 16d, and the other end of the transmission shaft 13 is connected to the fourth bearing 21.

[0029] Rotor assembly B also includes a wave-shaped washer 22, which is fitted onto the drive shaft 13 and located between the first bearing 11c and the first bearing housing 11d. When the first bearing 11c is subjected to axial force, the wave-shaped washer 22 can buffer the first bearing 11c.

[0030] The gear ring 15 is fixed to the fixed seat 11b as a whole, and the gear ring 15 is fixed to the first base plate in the fixed seat 11b. The gear ring 15 is engaged with the first ring sleeve. The axis of the transmission shaft 13 is on the same straight line as the center of the movable seat 11a and the fixed seat 11b.

[0031] The planetary gear housing 16 surrounds the sun gear 14. One end of the planetary gear housing 16 is pivotally connected to the rear rotor housing 11. In this embodiment, the rotor assembly B also includes a second bearing 19, which is sleeved on and fixed to the rear rotor housing 11. The planetary gear housing 16 is sleeved on and fixed to the second bearing 19.

[0032] The planetary gear carrier 16 has a clearance hole 16a on its circumferential surface. The planetary gear 17 is pivotally connected to the planetary gear carrier 16 via a pin 17a. The planetary gear 17 meshes with the sun gear 14. The planetary gear 17 also meshes with the gear ring 15 after passing through the clearance hole 16a.

[0033] The front rotor housing 18 is fixed to the gear ring 15. An output shaft 16b is provided at the other end of the planetary gear housing 16, passing through the front rotor housing 18 and pivotally connected to it. In this embodiment, the rotor assembly B also includes a third bearing 20, which is fitted onto and fixed to the planetary gear housing 16. The third bearing 20 is preferentially fitted onto and fixed to the second bearing housing 16d, and the rotor housing 18 is fitted onto and fixed to the third bearing 20.

[0034] This utility model also includes a screw C, which passes through the front electrode plate 1, the front rotor seat 18, the gear ring 15 and is threadedly connected to the fixed seat 11b, thereby fastening the stator assembly A and the rotor assembly B into one unit.

[0035] The working process of this utility model is as follows:

[0036] When the front coil 2 and the rear coil 4 are energized, the magnet 12 in the rotor assembly B rotates, which in turn drives the drive shaft 13 to rotate via the rear rotor seat 11. The drive shaft 13 then drives the sun gear 14 to rotate, which in turn transmits power to the planetary gears 17, causing them to rotate. This, in turn, drives the planetary gear carrier 16 to rotate, and the output shaft 16b rotates with the planetary gear carrier 16, thus outputting torque. Different gear ratios and output torques can be obtained by selecting the module and number of teeth of the ring gear 15 and the planetary gears 17.

Claims

1. A permanent magnet variable speed motor, comprising a stator assembly (A) and a rotor assembly (B), wherein the stator assembly (A) and the rotor assembly (B) are connected, characterized in that, The rotor assembly (B) includes a rear rotor housing (11), a magnet (12), a drive shaft (13), a sun gear (14), a gear ring (15), a planetary gear housing (16), planetary gears (17), and a front rotor housing (18); Magnet (12) surrounds the rear rotor seat (11) and is fixed to the rear rotor seat (11). One end of the drive shaft (13) is fixed to the rear rotor seat (11). The sun gear (14) is sleeved on the drive shaft (13) and fixed to the drive shaft (13). The gear ring (15) is fixed to the rear rotor seat (11) as a whole. Planetary gear housing (16) surrounds the sun gear (14). One end of the planetary gear housing (16) is pivotally connected to the rear rotor housing (11). A clearance hole (16a) is provided on the circumferential surface of the planetary gear housing (16). The planetary gear (17) is pivotally connected to the planetary gear housing (16). The planetary gear (17) meshes with the sun gear (14). The planetary gear (17) also passes through the clearance hole (16a) and meshes with the gear ring (15). The front rotor housing (18) is fixed to the gear ring (15) as a whole. The other end of the planetary gear housing (16) is provided with an output shaft (16b). The output shaft (16b) passes through the front rotor housing (18) and is pivotally connected to the front rotor housing (18).

2. The permanent magnet variable speed motor according to claim 1, characterized in that, The rear rotor housing (11) includes a movable seat (11a), a fixed seat (11b), and a first bearing (11c). One end of the drive shaft (13) is fixed to the movable seat (11a). The fixed seat (11b) is provided with a first bearing housing (11d). The first bearing (11c) is located inside the first bearing housing (11d) and is fixed to the first bearing housing (11d). The other end of the drive shaft (13) passes through the first bearing (11c) and is fixed to the first bearing (11c). The gear ring (15) is fixed to the fixed seat (11b) as a whole.

3. The permanent magnet variable speed motor according to claim 2, characterized in that, The movable seat (11a) includes a base plate and a ring fixed to the base plate, wherein the magnet (12) is fixed to the ring.

4. The permanent magnet variable speed motor according to claim 2, characterized in that, The rotor assembly (B) also includes a wave washer (22), which is fitted on the drive shaft (13) and is located between the first bearing (11c) and the first bearing housing (11d).

5. The permanent magnet variable speed motor according to claim 1, characterized in that, The rotor assembly (B) also includes a second bearing (19) and a third bearing (20). The second bearing (19) is fixed to the rear rotor housing (11), and the planetary gear housing (16) is fitted onto the second bearing (19) and fixed to the second bearing (19). The third bearing (20) is fitted onto the planetary gear housing (16) and fixed thereto. The rotor housing (18) is fitted onto the third bearing (20) and fixed thereto.

6. The permanent magnet variable speed motor according to claim 1, characterized in that, The rotor assembly (B) also includes a fourth bearing (21). The planetary gear housing (16) is composed of a planetary gear housing body (16c) and a second bearing housing (16d). One end of the second bearing housing (16d) is fixed to the planetary gear housing body (16c), and the other end of the second bearing housing (16d) is fixed to the output shaft (16b). The fourth bearing (21) is fixed to the second bearing housing (16d), and the other end of the drive shaft (13) is connected to the fourth bearing (21).

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