Motor

Abstract

The invention provides a motor which comprises a stator and a rotor, the rotor is sleeved with the stator, a first groove is formed in the end of the stator, one side of the first groove penetrates through the inner wall of the stator in the radial direction of the stator, a Hall chip is installed in the first groove, a magnetic ring is arranged at the end of the rotor, and the Hall chip is installed in the magnetic ring. And the Hall chip and the magnetic ring are arranged oppositely. According to the motor, the technical problem that the axial height of the motor is large due to the structure of the magnetic ring and the Hall plate in the prior art can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of motors, and in particular relates to a motor. Background Art

[0002] The PG motor is a household air-conditioning AC plastic-encapsulated motor that uses thyristor speed control. It is mainly composed of a stator, rotor, end cover, bearing, Hall assembly, magnetic ring, etc. The magnetic ring is fixed on the rotor and rotates synchronously with the rotor. The Hall assembly calculates the motor speed after receiving the signal from the magnetic ring. Generally, the magnetic ring of the PG motor is an independent component and needs to be installed separately on the rotor, located between the retaining spring and the bearing; the Hall assembly is composed of a PCB board, components, power cord, etc., and the pin solder joints of the components are facing one end of the squirrel cage rotor. Figure 1 As shown, the rotor 2 is sleeved in the stator 1, and the PCB board 1.4 and the magnetic ring 16 are axially arranged at the end of the rotor 2. Due to the structure of the magnetic ring 16 and the Hall plate, the axial height of the motor is relatively large, which is not conducive to the miniaturization of the motor. At the same time, the installation steps of the magnetic ring and the Hall component are cumbersome and prone to deviations, which places high operational requirements on employees in production, is not conducive to process efficiency improvement and cost reduction, and makes the market competitiveness of the motor low.

[0003] Since the motor in the prior art has technical problems such as a large axial height of the motor due to the structure of the magnetic ring and the Hall plate, the present invention studies and designs a motor. Summary of the invention

[0004] Therefore, the present invention provides a motor that can solve the technical problem in the prior art that the axial height of the motor is large due to the structure of the magnetic ring and the Hall plate.

[0005] In order to solve the above problems, the present invention provides a motor, including: a stator and a rotor, the rotor is sleeved in the stator, a first groove is provided at the end of the stator, and along the radial direction of the stator, one side of the first groove penetrates the inner wall of the stator, a Hall chip is installed in the first groove, and a magnetic ring is provided at the end of the rotor, and the Hall chip is arranged opposite to the magnetic ring.

[0006] In some embodiments, the motor further includes an end cover, the end cover is disposed at one end of the rotor, the stator has a gland opening for crimping the end cover, and the first groove is located at the end of the stator having the gland opening.

[0007] In some embodiments, the motor further includes a sheath, the Hall chip is sleeved in the sheath, the sheath matches the first groove, and the sheath is plugged into the first groove.

[0008] In some embodiments, the sheath includes a first baffle plate, two side plates are disposed on the first baffle plate, and the Hall chip is clamped between the two side plates.

[0009] In some embodiments, a top plate is provided at one end of the first baffle plate, and the top plate is connected to the end of the side plate. A second baffle plate is provided on the side of the side plate facing away from the first baffle plate. The second baffle plate on one side plate extends toward the other side plate. The first baffle plate, the second baffle plate, the side plate and the top plate enclose the Hall chip installation space.

[0010] In some embodiments, along the circumference of the nail, the length of the first baffle is the same as the length of the third groove, the distance between the side walls of the two side plates facing away from each other is the same as the length of the second groove, and along the axial direction of the stator, the height of the first baffle and the top plate is the same as the groove depth of the first groove.

[0011] In some embodiments, the first groove includes a second groove and a third groove, and the second groove and the third groove are arranged at the end of the stator. Along the radial outward direction of the stator, the second groove and the third groove, and one side of the second groove passes through the inner wall of the stator, and the other side of the second groove is connected to the third groove. Along the circumference of the stator, the length of the third groove is greater than the length of the second groove.

[0012] In some embodiments, the outer peripheral wall of the stator has an outlet terminal, the first groove is arranged opposite to the outlet terminal, and a plurality of interfaces are provided at the bottom of the first groove.

[0013] In some embodiments, a fourth groove is disposed at the end of the rotor, the fourth groove is annular, and the magnetic ring is disposed in the fourth groove.

[0014] In some embodiments, a plurality of reinforcing ribs are arranged on the peripheral wall of the magnetic ring along the circumference of the magnetic ring; the magnetic ring is embedded in the fourth groove, or a plurality of fifth grooves are arranged on the side wall of the fourth groove, the opening of the fifth groove is located at the end of the rotor, one side of the fifth groove is connected with the fourth groove, and the fifth groove corresponds to the reinforcing ribs one by one.

[0015] The motor provided by the present invention has the following beneficial effects:

[0016] A first groove is set at the end of the plastic-sealed structure of the plastic-sealed stator, and a Hall chip is installed in the first groove. The Hall chip is a Hall sensor, and the Hall sensor is installed in the first groove as a separate part. After the stator is injection-molded, a first groove is formed on the plastic-sealed stator, and the first groove is installed in the first groove. A magnetic ring is set at the end of the rotor, which removes the PCB board design in the prior art, optimizes the axial height of the PG motor, reduces the height of the motor end cover, and thus reduces the axial height of the motor, realizes the miniaturization development of the PG motor, expands the new air-conditioning market, and enhances the market competitiveness of the PG motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of a motor in the prior art;

[0019] Figure 2 The structure of the motor of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 3 The structure of the motor of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 4 It is a structural schematic diagram of a stator in the motor of the present invention;

[0022] Figure 5 The structure of the sheath in the motor of the present invention is schematically shown. Figure 1 ;

[0023] Figure 6 The structure of the sheath in the motor of the present invention is schematically shown. Figure 2 ;

[0024] Figure 7 It is a partial enlargement of the motor of the present invention. Figure 1 ;

[0025] Figure 8 It is a partial enlargement of the motor of the present invention. Figure 2 ;

[0026] Fig. 9 It is a schematic structural diagram of a rotor in a motor of the present invention;

[0027] Fig.10 It is a schematic diagram of the structure of the magnetic ring in the motor of the present invention.

[0028] The accompanying drawings are marked as follows:

[0029] 1. Stator; 1.4. PCB board; 2. Rotor; 3. Hall chip; 4. Sheath; 5. First groove; 6. Second groove; 7. Third groove; 8. Interface; 9. Gland opening; 10. Outlet terminal; 11. Communication cable; 12. Top plate; 13. First baffle; 14. Second baffle; 15. Side plate; 16. Magnetic ring; 17. Fourth groove; 18. Reinforcement rib; 19. End cover. DETAILED DESCRIPTION

[0030] 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 described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0032] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0033] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0034] See also Figure 1-10 As shown, according to an embodiment of the present invention, a motor is provided, comprising: a stator 1 and a rotor 2, wherein the rotor 2 is sleeved in the stator 1, a first groove 5 is provided at the end of the stator 1, and along the radial direction of the stator 1, one side of the first groove 5 penetrates the inner wall of the stator 1, a Hall chip 3 is installed in the first groove 5, and a magnetic ring 16 is provided at the end of the rotor 2, and the Hall chip 3 is arranged opposite to the magnetic ring 16. In this technical solution, a first groove 5 is provided at the end of the plastic-encapsulated structure of the plastic-encapsulated stator 1, a Hall chip 3 is installed in the first groove 5, and the Hall chip 3 is a Hall sensor. The Hall sensor is installed in the first groove 5 as a separate part. After the stator is injection molded, a first groove 5 is formed on the plastic-encapsulated stator, and the first groove 5 is installed in the first groove 5. A magnetic ring 16 is provided at the end of the rotor 2, and the PCB board design in the prior art is removed, the axial height of the PG motor is optimized, and the height of the motor end cover is reduced, thereby reducing the axial height of the motor, realizing the miniaturization development of the PG motor, expanding the new air-conditioning market, and improving the market competitiveness of the PG motor.

[0035] In some embodiments, the motor further includes an end cap 19, the end cap 19 is arranged at one end of the rotor 2, the stator 1 has a gland opening 9 for crimping the end cap 19, and the first groove 5 is located at the end of the stator 1 having the gland opening 9. In this technical solution, the stator 1 has a gland opening 9 for crimping the end cap 19, the first groove 5 is located at the end of the stator 1 having the gland opening 9, and one side of the first groove 5 passes through the inner wall of the stator 1, so that there is no obstruction between the rotor 2 of the PG motor and the first groove 5, thereby improving the induction effect between the Hall chip 3 and the magnetic ring 16.

[0036] In some embodiments, the motor further includes a sheath 4, the Hall chip 3 is sleeved in the sheath 4, the sheath 4 matches the first groove 5, and the sheath 4 is plugged into the first groove 5. In this technical solution, the sheath 4 is used to fix and protect the Hall chip 3, the sheath 4 and the Hall chip 3 are installed on the first groove 5 together, and the installation of the sheath 4 covers the entire first groove 5, so that the surroundings of the Hall chip 3 are effectively protected, and at the same time, it can ensure that the Hall chip 3 is effectively fixed on the stator 1.

[0037] In some embodiments, the sheath 4 includes a first baffle 13, on which two side plates 15 are arranged, and the Hall chip 3 is clamped between the two side plates 15. In this technical solution, preferably, the first baffle 13 and the side plates 15 are arranged vertically, and the first baffle 13 and the side plates 15 form a U-shaped structure, and the shape and size of the sheath 4 match the first groove 5, so that the sheath 4 can be embedded in the Hall groove without loosening. The side plates 15 can protect both sides of the Hall chip 3 and fix the Hall chip 3 to prevent the Hall chip 3 from moving left and right, and can also be used to support the entire sheath 4 and withstand the pressure from the end cover 19.

[0038] In some embodiments, a top plate 12 is provided at one end of the first baffle plate 13, and the top plate 12 is connected to the end of the side plate 15. A second baffle plate 14 is provided on the side of the side plate 15 facing away from the first baffle plate 13. The second baffle plate 14 on one side plate 15 extends toward the other side plate 15. The first baffle plate 13, the second baffle plate 14, the side plate 15 and the top plate 12 enclose a mounting space for the Hall chip 3. In this technical solution, the top plate 12 is used to protect against the impact from the closing of the motor end cover 19, and can also press and fix the Hall chip 3; the second baffle 14 is an inwardly slightly raised structure on the side plate 15, and the second baffle 14 can effectively prevent the Hall chip 3 from moving forward and backward, and an opening structure is formed between the other end of the first baffle 13 and the two second baffles 14. The opening structure formed between the two second baffles 14 can enable the Hall chip 3 to receive signals from the magnetic ring more efficiently; the space enclosed by the first baffle 13, the second baffle 14, the side plate 15 and the top plate 12 of the sleeve 4 is consistent with the shape and structure of the Hall chip 3, so that the Hall chip 3 is fixed in the first groove 5 from the axial and radial directions. At the same time, the sleeve 4 can also be properly embedded in the first groove 5. Preferably, after installation, the top plate 12 is flush with the PG motor stator pressure cover opening 9.

[0039] In some embodiments, along the circumference of the nail 1, the length of the first baffle 13 is the same as the length of the third groove 7, the distance between the side walls of the two side plates 15 facing away from each other is the same as the length of the second groove 6, and along the axial direction of the stator 1, the height of the first baffle 13 and the top plate 12 is the same as the groove depth of the first groove 5. In this technical solution, by making the length of the first baffle 13 and the third groove 7 along the circumference of the nail 1 the same, the distance between the side walls of the two side plates 15 facing away from each other is the same as the length of the second groove 6, and along the axial direction of the stator 1, the height of the first baffle 13 and the top plate 12 is the same as the groove depth of the first groove 5, the sheath 4 can be effectively fixed in the first groove 5 to prevent the sheath 4 from moving.

[0040] In some embodiments, the first groove 5 includes a second groove 6 and a third groove 7, and the second groove 6 and the third groove 7 are arranged at the end of the stator 1, and along the radial outward direction of the stator 1, the second groove 6 and the third groove 7, and one side of the second groove 6 penetrates the inner wall of the stator 1, and the other side of the second groove 6 is connected to the third groove 7, and along the circumference of the stator 1, the length of the third groove 7 is greater than the length of the second groove 6. In this technical solution, the first groove 5 includes the second groove 6 and the third groove 7, and the cross section of the stator is used as the projection surface. The first groove 5 is in a "convex" shape, and is axially recessed from the end surface of the gland opening to the inside of the motor by a certain height. The spatial position and structure of the magnetic ring 16 and the Hall assembly are optimized, and the height of the motor end cover can be reduced, thereby realizing the miniaturization of the motor.

[0041] In some embodiments, the stator 1 has an outlet terminal 10 on the outer peripheral wall, and the first groove 5 is arranged opposite to the outlet terminal 10, and a plurality of interfaces 8 are arranged at the bottom of the first groove 5. In this technical solution, the first groove 5 is arranged opposite to the outlet terminal 10, which is convenient for arranging the lead wires of the Hall chip 3. Preferably, the interface 8 is arranged at the bottom of the second groove 6. The number of communication interfaces 8 is consistent with the number of mounting pins of the Hall chip 3. There are connectors for installing the Hall chip inside the communication interface 8, and each connector is connected to the communication cable 11 for the transmission of the Hall signal. The Hall chip 3 has a connector, and the plug position of the connector is connected to the communication interface 8. The connector is generally made of metal and serves as a bridge connecting the Hall chip 3 and the communication cable 11, so that the signal of the Hall chip 3 can be transmitted through the communication cable 11. Preferably, the plug-in position of the plug-in component is exposed to form the communication interface 8, and the remaining part is welded to one end of the communication cable 11 and firmly sealed inside the stator, and the other end of the communication cable 11 extends out of the stator and communicates with the outside world, so that the signal of the Hall chip 3 can be connected to the outside world.

[0042] In some embodiments, a fourth groove 17 is provided at the end of the rotor 2, the fourth groove 17 is annular, and the magnetic ring 16 is provided in the fourth groove 17. In this technical solution, when the PG motor is installed, the horizontal position of the magnetic ring 1616 is equivalent to the horizontal position of the first groove 5 of the new stator. When the motor is running, the Hall chip 3 installed on the first groove 5 can normally receive the signal sent by the magnetic ring 16, and transmit it to the outside of the motor by the communication cable 11.

[0043] In some embodiments, along the circumference of the magnetic ring 16, a plurality of reinforcing ribs 19 are arranged on the circumferential wall of the magnetic ring 16; the magnetic ring 16 is embedded in the fourth groove 17, or a plurality of fifth grooves are arranged on the side wall of the fourth groove 17, the opening of the fifth groove is located at the end of the rotor 2, one side of the fifth groove is connected to the fourth groove 17, and the fifth groove corresponds to the reinforcing ribs 19 one by one. In this technical solution, preferably, a plurality of reinforcing ribs 19 are arranged on the inner and outer circumferential walls of the magnetic ring 16, and the reinforcing ribs 19 are arranged at intervals along the circumference of the magnetic ring 16. In the motor of the present invention, the rotor 2 is embedded with the magnetic ring 16, and the magnetic ring 16 is in a circular ring structure, and the outer diameter of the magnetic ring 16 is slightly smaller than the outer diameter of the rotor 2. There are a plurality of reinforcing ribs 18 on both sides of the magnetic ring 16, and preferably, the reinforcing ribs 18 are vertical bar-shaped, wide at the top and narrow at the bottom, so that the magnetic ring 16 is easier to press-fit with the rotor 2 and is not easy to be relatively displaced with the rotor 2.

[0044] In some embodiments, the reinforcing ribs 18 may be in the form of oblique bars, and their inclination direction is opposite to the rotation direction of the rotor 2. When the motor is started, the rotor 2 is rotating at an accelerated speed, and the magnetic ring 16 will generate a force opposite to the rotation direction of the rotor 2 due to its inertia, so that the magnetic ring 16 is more tightly and firmly fixed on the rotor 1.

[0045] In some embodiments, a fourth groove 17 is provided on the rotor 2 . The fourth groove 17 is formed of aluminum or an aluminum alloy, and its shape and size match those of the magnetic ring 16 , so that the magnetic ring 16 can be embedded in the rotor 2 .

[0046] In some embodiments, a strip-shaped fifth groove corresponding to the reinforcing rib 18 may be provided inside the fourth groove 17, so that the magnetic ring 16 can be effortlessly spliced ​​into the fourth groove 17, and a better fixing effect can be achieved with adhesive.

[0047] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A motor, characterized in that: include: A stator (1) and a rotor (2), wherein the rotor (2) is sleeved in the stator (1), a first groove (5) is provided at the end of the stator (1), one side of the first groove (5) penetrates the inner wall of the stator (1) along the radial direction of the stator (1), a Hall chip (3) is installed in the first groove (5), a magnetic ring (16) is provided at the end of the rotor (2), and the Hall chip (3) and the magnetic ring (16) are arranged opposite to each other.

2. The motor according to claim 1, characterized in that: The motor further comprises an end cover (19), wherein the end cover (19) is arranged at one end of the rotor (2), the stator (1) comprises a gland opening (9) for crimping the end cover (19), and the first groove (5) is located at the end of the stator (1) comprising the gland opening (9).

3. The motor according to claim 2, characterized in that: The motor further comprises a sheath (4), the Hall chip (3) is sleeved in the sheath (4), the sheath (4) matches the first groove (5), and the sheath (4) is plugged into the first groove (5).

4. The motor according to claim 3, characterized in that: The sheath (4) comprises a first baffle (13), two side plates (15) are arranged on the first baffle (13), and the Hall chip (3) is clamped between the two side plates (15).

5. The motor according to claim 4, characterized in that: A top plate (12) is provided at one end of the first baffle plate (13), the top plate (12) is connected to the end of the side plate (15), a second baffle plate (14) is provided on the side of the side plate (15) facing away from the first baffle plate (13), the second baffle plate (14) on one side plate (15) extends toward the other side plate (15), and the first baffle plate (13), the second baffle plate (14), the side plate (15) and the top plate (12) enclose a mounting space for the Hall chip (3).

6. The motor according to claim 5, characterized in that: Along the circumference of the nail (1), the length of the first baffle (13) is the same as the length of the third groove (7), the distance between the side walls of the two side plates (15) facing away from each other is the same as the length of the second groove (6), and along the axial direction of the stator (1), the height of the first baffle (13) and the top plate (12) is the same as the groove depth of the first groove (5).

7. The motor according to claim 1, characterized in that: The first groove (5) comprises a second groove (6) and a third groove (7), wherein the second groove (6) and the third groove (7) are arranged at the end of the stator (1), and along the radial outward direction of the stator (1), the second groove (6) and the third groove (7), and one side of the second groove (6) passes through the inner wall of the stator (1), and the other side of the second groove (6) is connected to the third groove (7), and along the circumferential direction of the stator (1), the length of the third groove (7) is greater than the length of the second groove (6).

8. The motor according to claim 1, characterized in that: The stator (1) has an outer peripheral wall with an outlet terminal (10), the first groove (5) is arranged opposite to the outlet terminal (10), and a plurality of interfaces (8) are provided at the bottom of the first groove (5).

9. The motor according to claim 1, characterized in that: A fourth groove (17) is provided at the end of the rotor (2); the fourth groove (17) is annular in shape, and the magnetic ring (16) is arranged in the fourth groove (17).

10. The motor according to claim 9, characterized in that: Along the circumference of the magnetic ring (16), a plurality of reinforcing ribs (19) are arranged on the peripheral wall of the magnetic ring (16); the magnetic ring (16) is embedded in the fourth groove (17), or a plurality of fifth grooves are arranged on the side wall of the fourth groove (17), the opening of the fifth groove is located at the end of the rotor (2), one side of the fifth groove is connected to the fourth groove (17), and the fifth groove corresponds to the reinforcing ribs (19) one by one.

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