Safe and compact-structure dual-rotor motor and clothes dryer comprising same

Abstract

A safe and compact-structure dual-rotor motor and a clothes dryer comprising the same are disclosed, the safe and compact-structure dual-rotor motor comprises a stator core and a stator coil holder, the stator coil holder is connected to the axial end face of the stator core through a plurality of metal connecting pieces, the stator core is provided with an outer stator wire slot for accommodating an outer stator winding and an inner stator wire slot for accommodating an inner stator winding, the metal connecting piece is arranged between the outer stator wire slot and the inner stator wire slot, and the stator wire frame is provided with an outer insulating ring located between the outer stator wire slot and the metal connecting piece and an inner insulating ring located between the inner stator wire slot and the metal connecting piece. According to the utility model, the structure of the double-rotor motor is more compact, and the size is smaller.

Description

Technical Field

[0001] This utility model relates to a safe and compact dual-rotor motor and a clothes dryer containing the same, belonging to the technical field of dual-rotor motors. Background Technology

[0002] In the prior art, the stator core of a dual-rotor motor is often fixed with an insulating frame on the axial end face of the stator core by a high-strength metal connector such as a press-fit shaft to ensure the electrical safety of the inner and outer stator windings and the stator core.

[0003] Because a large safety distance needs to be maintained between the inner stator winding and the metal connector, and between the outer stator winding and the metal connector, to prevent the inner and outer stator windings from breaking down, the outer diameter of the stator core is large. Consequently, the motor is also relatively large, which is not suitable for use in applications with high size requirements, such as clothes dryers, and is not conducive to compact equipment design. Utility Model Content

[0004] One of the objectives of this application is to provide a dual-rotor motor with good electrical safety, a more compact structure, and a smaller size.

[0005] A dual-rotor motor includes a stator core and a stator frame. The stator frame is connected to the axial end face of the stator core by multiple metal connectors. The stator core has an outer stator slot for accommodating the outer stator winding and an inner stator slot for accommodating the inner stator winding. The metal connectors are disposed between the outer stator slot and the inner stator slot. The stator frame is provided with an outer insulating ring located between the outer stator slot and the metal connectors and an inner insulating ring located between the inner stator slot and the metal connectors.

[0006] Preferably, the outer insulating ring and the stator frame are integrally formed and connected, and the inner insulating ring and the stator frame are integrally formed and connected.

[0007] Preferably, the outer wall of the outer insulating ring is recessed towards the inner wall of the outer insulating ring to form a creepage path extension segment one.

[0008] Preferably, the inner wall of the inner insulating ring is recessed towards the outer wall of the inner insulating ring to form the second creepage path extension.

[0009] Preferably, the stator core has a yoke, and the stator frame includes a yoke fitting ring for fitting to the yoke. The outer periphery of the yoke fitting ring is provided with a plurality of outer insulating portions for insulating a plurality of teeth on the stator core that are relatively outward, and the inner periphery of the yoke fitting ring is provided with a plurality of inner insulating portions for insulating a plurality of teeth on the stator core that are relatively inward.

[0010] The outer insulating ring is located at the outer circumference of the yoke fitting ring, and the inner insulating ring is located at the inner circumference of the yoke fitting ring.

[0011] Preferably, the yoke fitting ring is provided with a connecting hole for the metal connector to pass through, the connecting hole being tangent to the inner wall of the outer insulating ring and the connecting hole being tangent to the outer wall of the inner insulating ring.

[0012] Preferably, the axial end face of the yoke fitting ring facing the stator core is further provided with a plurality of positioning posts, and the axial end face of the stator core facing the yoke fitting ring is provided with positioning holes that cooperate with the positioning posts.

[0013] Another object of this application is to provide a clothes dryer that includes the dual rotor motor in any of the above-mentioned technical solutions.

[0014] In summary, this utility model has the following beneficial effects:

[0015] 1. The dual-rotor motor of this utility model, by setting an outer insulating ring between the outer stator slot and the metal connector and an inner insulating ring between the inner stator slot and the metal connector on the stator frame, increases the creepage distance between the metal connector and the outer stator winding by the outer insulating ring and the creepage distance between the metal connector and the inner stator winding by the inner insulating ring. Thus, the stator size can be reduced while ensuring electrical safety, making the dual-rotor motor more compact and smaller in size, making it suitable for applications with high size requirements such as clothes dryers.

[0016] 2. In the dual-rotor motor of this utility model, the outer wall of the outer insulating ring is recessed towards the inner wall of the outer insulating ring to form a creepage path extension section one, which further increases the creepage distance between the metal connector and the outer stator winding, and at the same time reduces the amount of material used in the manufacturing of the stator frame; the inner wall of the inner insulating ring is recessed towards the outer wall of the inner insulating ring to form a creepage path extension section two, which further increases the creepage distance between the metal connector and the inner stator winding, and at the same time reduces the amount of material used in the manufacturing of the stator frame.

[0017] 3. The dryer of this utility model uses the above-mentioned dual rotor motor. Since the dual rotor motor is smaller in size and more compact in structure, it occupies relatively less space in the dryer. Thus, it is also more convenient to install the dual rotor motor while ensuring that the dryer has sufficient drying capacity. Attached Figure Description

[0018] Figure 1 This is a partial structural diagram of a dual-rotor motor;

[0019] Figure 2 for Figure 1 An explosion diagram;

[0020] Figure 3 This is a structural schematic diagram of the stator frame from a first-view perspective;

[0021] Figure 4 This is a structural schematic diagram of the stator frame from a second perspective;

[0022] Figure 5 This is a structural schematic diagram of the stator frame from a third-person perspective;

[0023] Figure 6 This is a diagram showing the arrangement of the outer insulating ring and the outer insulating ring. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] Example:

[0026] Appendix Figure 1-2 This diagram shows a partial structural schematic of a dual-rotor motor, specifically a schematic diagram of the stator frame 12 mounted on both axial ends of the stator core 11. (Attached) Figure 2 for Figure 1 An explosion diagram.

[0027] The dual-rotor motor includes a stator core 11, with stator winding frames 12 provided at both axial ends of the stator core 11. The stator core 11 has multiple outer stator winding slots 111 and multiple inner stator winding slots 112 arranged in a circular pattern. Both the outer and inner stator winding slots 111 and 112 are separated by multiple teeth 114 evenly distributed on a yoke 113, with the teeth 114 extending in opposite directions. The outer stator winding slots 111 accommodate the outer stator windings, while the inner stator winding slots 112 accommodate the inner stator windings.

[0028] The stator frame 12 includes a yoke fitting ring 123, which is used to fit onto the yoke 113 of the stator core 11 and is connected to the stator core 11 by a plurality of metal connectors 13, which may be pins. The plurality of metal connectors 13 are arranged circumferentially around the central axis of the yoke fitting ring 123. The yoke fitting ring 123 is provided with connecting holes 1231 for the metal connectors 13 to pass through. The stator core 11 is provided with mating holes 119 that mate with the metal connectors 13. The outer periphery of the yoke fitting ring 123 is provided with a plurality of outer insulating portions 121 for insulating a plurality of teeth 114 on the stator core 11 that are relatively outward. The inner periphery of the yoke fitting ring 123 is provided with a plurality of inner insulating portions 122 for insulating a plurality of teeth 114 on the stator core 11 that are relatively inward.

[0029] The yoke fitting ring 123 is provided with a plurality of positioning posts 1232 on its axial end face facing the stator core 11. The stator core 11 is provided with positioning holes 118 that mate with the positioning posts 1232 on its axial end face facing the yoke fitting ring 123. Before the user fixes the yoke fitting ring 123 to the stator core 11 using the metal connector 13, the user needs to position the aforementioned mating hole 119 and connecting hole 1231 to ensure that they are axially aligned. The presence of the positioning posts 1232 and positioning holes 118 enables quick positioning between the mating hole 119 and connecting hole 1231, simplifying the assembly process.

[0030] like Figure 2-5 As shown, the stator frame 12 is also provided with an outer insulating ring 124 and an inner insulating ring 125. The outer insulating ring 124 and the inner insulating ring 125 are specifically arranged on the yoke fitting ring 123 to prevent interference between the outer stator winding and the inner stator winding. The outer insulating ring 124 is located between the outer stator slot 111 and the metal connector 13, and the inner insulating ring 125 is located between the inner stator slot 112 and the metal connector 13. The outer insulating ring 124 increases the creepage distance between the metal connector 13 and the outer stator winding, and the inner insulating ring 125 increases the creepage distance between the metal connector 13 and the inner stator winding. Therefore, under the premise of ensuring electrical safety, the distance between the outer stator slot and the inner stator slot can be set closer, that is, the outer diameter of the stator core can be reduced, thereby reducing the stator size. Correspondingly, the entire dual-rotor motor is smaller in size, more compact in structure, and smaller in volume. In the existing technology, in order to prevent breakdown of the outer stator winding and inner stator winding and to ensure the life of the motor, the distance between the outer stator winding and inner stator winding is often relatively large. This results in a relatively large diameter of the stator core, and thus the size of the dual rotor motor is still relatively large.

[0031] The outer insulating ring 124 is located on the outer circumference of the yoke fitting ring 123, while the inner insulating ring 125 is located on the inner circumference of the yoke fitting ring 123. This structural design allows the outer circumference of the yoke fitting ring 123 to be as close as possible to its inner circumference when using the same metal connector 13 in the prior art. For the yoke 11 of the stator core, this also means that its outer circumference can be designed to be as close as possible to its inner circumference. While keeping the inner circumferential dimension of the yoke 11 unchanged, the outer circumferential diameter of the yoke 11 can be reduced, thereby further miniaturizing the overall diameter of the stator core. As a result, the size of the dual-rotor motor becomes smaller, the structure becomes more compact, and more efficient space utilization is achieved.

[0032] The connecting hole 1231 is tangent to the inner wall of the outer insulating ring 124 and also tangent to the outer wall of the inner insulating ring 125. This structural design minimizes the distance between the outer insulating ring 124 and the inner insulating ring 125 when using the same metal connector 13 as in the prior art. Correspondingly, the outer periphery of the yoke fitting ring 123 can be further brought closer to its inner periphery. For the yoke 11 of the stator core, this also means that its outer periphery can be further brought closer to its inner periphery. While keeping the inner periphery size of the yoke 11 unchanged, the outer periphery diameter of the yoke 11 can be further reduced, thereby further miniaturizing the overall diameter of the stator core. As a result, the size of the dual-rotor motor becomes smaller, the structure becomes more compact, and more efficient space utilization is achieved.

[0033] The outer insulating ring 124 and the stator frame 12 are integrally formed and connected, and the inner insulating ring 125 and the stator frame 12 are integrally formed and connected. That is, the outer insulating ring 124 and the inner insulating ring 125 are part of the structure of the stator frame 12. They are installed together with the stator frame 12 as a whole on the stator core 11. There is no need to install the outer insulating ring 124 and the stator frame 12 separately, which makes the installation convenient.

[0034] like Figure 6 As shown, the outer wall of the outer insulating ring 124 is recessed towards the inner wall of the outer insulating ring 124 to form a creepage path extension section 1241. The creepage path extension section 1241 increases the creepage path, further increasing the creepage distance between the metal connector 13 and the outer stator winding. At the same time, it reduces the amount of material used in the manufacturing of the stator frame 12.

[0035] The inner wall of the inner insulating ring 125 is recessed towards the outer wall of the inner insulating ring 125 to form a second creepage path extension 1251. The second creepage path extension 1251 increases the creepage path, further increasing the creepage distance between the metal connector 13 and the inner stator winding. At the same time, it reduces the amount of material used in the manufacturing of the stator frame 12.

[0036] The embodiment also relates to a clothes dryer that uses the above-mentioned dual rotor motor. Since the dual rotor motor is smaller and more compact than the traditional dual rotor motor, it occupies relatively less space in the clothes dryer. Thus, it is also more convenient to install the dual rotor motor while ensuring that there is sufficient drying capacity inside the clothes dryer.

[0037] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention. The technical content for which protection is sought in the present invention has been fully described in the claims.

Claims

1. A safe and compact dual-rotor motor, comprising a stator core (11) and a stator frame (12), wherein the stator frame (12) is connected to the axial end face of the stator core (11) by a plurality of metal connectors (13), the stator core (11) having an outer stator slot (111) for accommodating an outer stator winding and an inner stator slot (112) for accommodating an inner stator winding, the metal connectors (13) being disposed between the outer stator slot (111) and the inner stator slot (112), characterized in that, The stator frame (12) is provided with an outer insulating ring (124) located between the outer stator groove (111) and the metal connector (13) and an inner insulating ring (125) located between the inner stator groove (112) and the metal connector (13).

2. The safe and compact dual-rotor motor according to claim 1, characterized in that, The outer insulating ring (124) and the stator frame (12) are integrally formed and connected, and the inner insulating ring (125) and the stator frame (12) are integrally formed and connected.

3. A safe and compact dual-rotor motor according to claim 1, characterized in that, The outer wall of the outer insulating ring (124) is recessed towards the inner wall of the outer insulating ring (124) to form a creepage path extension section (1241).

4. A safe and compact dual-rotor motor according to claim 1, characterized in that, The inner wall of the inner insulating ring (125) is recessed towards the outer wall of the inner insulating ring (125) to form the second creepage path extension (1251).

5. A safe and compact dual-rotor motor according to claim 1, characterized in that, The stator core (11) has a yoke (113), and the stator frame (12) includes a yoke fitting ring (123) for fitting to the yoke (113). The outer periphery of the yoke fitting ring (123) is provided with a plurality of outer insulating portions (121) for insulating a plurality of relatively outer teeth (114) on the stator core (11), and the inner periphery of the yoke fitting ring (123) is provided with a plurality of inner insulating portions (122) for insulating a plurality of relatively inner teeth (114) on the stator core (11). The outer insulating ring (124) is located on the outer circumference of the yoke fitting ring (123), and the inner insulating ring (125) is located on the inner circumference of the yoke fitting ring (123).

6. A safe and compact dual-rotor motor according to claim 5, characterized in that, The yoke fitting ring (123) is provided with a connecting hole (1231) through which the metal connector (13) passes. The connecting hole (1231) is tangent to the inner wall of the outer insulating ring (124) and the connecting hole (1231) is tangent to the outer wall of the inner insulating ring (125).

7. A safe and compact dual-rotor motor according to claim 5, characterized in that, The axial end face of the yoke fitting ring (123) facing the stator core (11) is also provided with a number of positioning posts (1232), and the axial end face of the stator core (11) facing the yoke fitting ring (123) is provided with positioning holes (118) that cooperate with the positioning posts (1232).

8. A clothes dryer, characterized in that, It includes the dual-rotor motor described in any one of claims 1 to 7.

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