Axial dual stator motor

Abstract

This utility model discloses an axial double-stator motor, including a motor base, a rotor, an upper stator, and a lower stator. The rotor is located between the upper and lower stators. The upper and lower stators are respectively fixed to one end face of the motor base. The motor also includes an upper wire guard and a lower wire guard located between the upper and lower stators. The upper wire guard has a first groove for guiding and fixing the upper stator winding leads; the lower wire guard has a second groove for guiding and fixing the lower stator winding leads. Compared with the prior art, this utility model provides a guiding and fixing path for the winding leads by setting upper and lower wire guards and their grooves between the two stators, effectively eliminating internal flying wires and avoiding interference with the rotor's movement.

Description

Technical Field

[0001] This utility model relates to the field of motors, and in particular to an axial double stator motor. Background Technology

[0002] In the field of electric motors, axial dual-stator motors are widely used in various scenarios such as household appliances and industrial drives due to their advantages of compact structure and high power density. For example... Figure 1 and Figure 2 As shown, the existing axial dual-stator motor includes an upper stator mounting screw 1, an upper stator 2, an upper frame 3, an upper stator winding 4, a stator support column 5, a rotor 6, a bearing assembly 7, a lower stator mounting screw 8, a lower stator winding 9, a lower frame 10, a lower stator 11, a base 12, a PCBA 13, and a PCBA fixing screw 14. The PCBA 13 is fixed to the back of the motor base, the stator windings 4 and 9 are on the other side of the base, the rotor 6 is between the two stators, the lower stator 11 is fixed to the base 12, and the upper stator 2 is fixed to the base 12 by three stator support columns 7 and screws 1. During motor assembly and operation, the three-phase leads of the motor need to be welded and fixed on the PCBA 13. In addition, the three-phase winding leads of the upper and lower stators need to be connected. If the enameled wire is directly pulled out and welded, there is a risk of interference with the rotor between the two stators. In addition, since the enameled wire is not fixed when it is pulled out, it is easy to form a flying wire, which reduces the overall reliability of the motor operation.

[0003] A search revealed a Chinese patent publication number CN202918108U that discloses a motor lead wire structure. This structure uses a boss with a through hole on the motor end cover to embed an independent wire sheath into the through hole and fit it onto the boss. The wire sheath covers the connection joint between the stator winding and the external lead wire, achieving the effects of structural simplification, reduction of parts, size reduction, cost reduction, and improved assembly efficiency. However, this structure is only suitable for single-stator motors, and the wire sheath has a relatively simple function. It lacks guidance for the lead wires of the internal windings and a design to accommodate the solder joints, making it difficult to apply to the lead wire layout and solder joint protection requirements of the internal space of axial double-stator motors. It also poses risks of lead wire interference and flying wires.

[0004] Therefore, given the structural characteristics of axial dual-stator motors, how to reliably guide and fix the internal leads of the motor and avoid interference with the rotor is a technical problem that needs to be solved. Utility Model Content

[0005] The purpose of this invention is to overcome the defects of the existing technology and provide an axial double stator motor.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] According to one aspect of the present invention, an axial dual-stator motor is provided, comprising a motor base, a rotor, an upper stator and a lower stator, wherein the rotor is located between the upper stator and the lower stator, and the upper stator and the lower stator are respectively fixed to one end face of the motor base. The motor also includes an upper wire sheath and a lower wire sheath located between the upper stator and the lower stator respectively.

[0008] The upper wire sheath is provided with a first groove for guiding and fixing the upper stator winding output wire; the lower wire sheath is provided with a second groove for guiding and fixing the lower stator winding output wire.

[0009] As a preferred technical solution, the lower guard wire is provided with an extension portion, and the extension portion has a right-angle groove for guiding the motor lead wire to the other end face of the motor base.

[0010] As a preferred technical solution, the upper wire sleeve is provided with a first recessed portion, and the first recessed portion forms a receiving space for accommodating the connection solder joint of the upper and lower stator winding leads.

[0011] Alternatively, the lower guard sleeve is provided with a second recess, which forms a receiving space for accommodating the connection solder joints of the upper and lower stator winding leads;

[0012] Alternatively, the upper guard wire is provided with a first recess, and the lower guard wire is provided with a second recess corresponding to the first recess, the first recess and the second recess together forming a receiving space for accommodating the connection solder joints of the upper and lower stator winding leads.

[0013] As a preferred technical solution, the depth of the first recess and the second recess is greater than the height of the connection solder joint of the upper and lower stator winding leads.

[0014] As a preferred technical solution, the motor further includes a stator support column located between the upper stator and the lower stator, the stator support column passing through the upper wire sheath and the lower wire sheath respectively.

[0015] As a preferred technical solution, the upper wire sheath is provided with a first through hole that cooperates with the stator support column, and the lower wire sheath is provided with a second through hole that cooperates with the stator support column.

[0016] As a preferred technical solution, the first through hole and the second through hole are respectively clearance fit with the stator support column and are fixed by adhesive dispensing.

[0017] As a preferred technical solution, both the upper and lower wire sheaths are components made of insulating material.

[0018] As a preferred technical solution, there are three of each of the first and second grooves, which are used to guide the three-phase winding leads respectively; there are three right-angle grooves, which are used to guide the three-phase motor leads respectively.

[0019] As a preferred technical solution, the rotor is a non-circular rotor, and both the upper stator and the lower stator are non-circular stators.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. This utility model provides a guiding and fixing path for the winding lead-out wire by setting upper and lower protective sleeves and their upper grooves, effectively protecting the winding lead-out wire and eliminating internal flying wires, thus avoiding interference with the rotor's movement.

[0022] 2. This utility model provides a dedicated space for the winding connection solder joints by setting corresponding recesses on the upper and lower protective sleeves, ensuring that the solder joints do not protrude and further eliminating the risk of interference.

[0023] 3. This utility model provides an extension with a right-angled groove on the back of the lower cable sleeve, which accurately guides the motor lead wire to the PCBA solder joint, preventing the lead wire from becoming loose and improving the connection reliability.

[0024] 4. The upper and lower protective sleeves of this utility model are made of insulating materials to isolate electrical connections, thereby improving electrical safety and reliability. Attached Figure Description

[0025] Figure 1 Exploded view of an existing axial dual-stator motor;

[0026] Figure 2 This is a schematic diagram of an existing axial dual-stator motor.

[0027] Figure 3 This is a schematic diagram of the axial double stator motor structure of Embodiment 1 of this utility model;

[0028] Figure 4 This is an exploded view of the axial double-stator motor of Embodiment 2 of this utility model;

[0029] Figure 5 This is an external view of the axial double stator motor of Embodiment 2 of this utility model;

[0030] Figure 6 This is a schematic diagram of the upper protective sleeve structure of Embodiment 3 of this utility model;

[0031] Figure 7(a) is a schematic diagram of the front structure of the lower wire sheath of Embodiment 3 of this utility model;

[0032] Figure 7(b) is a schematic diagram of the back structure of the lower protective sleeve in Embodiment 3 of this utility model;

[0033] Figure 8 This is a schematic diagram of the axial double stator motor output structure of Embodiment 3 of this utility model;

[0034] Figure 1 As indicated by the standard number:

[0035] 1 is the upper stator mounting screw, 2 is the upper stator, 3 is the upper frame, 4 is the upper stator winding, 5 is the stator support column, 6 is the rotor, 7 is the bearing assembly, 8 is the lower stator mounting screw, 9 is the lower stator winding, 10 is the lower frame, 11 is the lower stator, 12 is the base, 13 is the PCBA, and 14 is the PCBA fixing screw.

[0036] Figure 3 As indicated by the standard number:

[0037] 15 is the upper wire sheath, and 16 is the lower wire sheath;

[0038] Figure 6 As indicated by the standard number:

[0039] 17 is the first through hole, 18 is the first groove, and 19 is the first recess.

[0040] As indicated by the labels in Figure 7(a):

[0041] 20 is the second through hole, 21 is the second groove, 22 is the second recess, and 24 is the right-angle groove;

[0042] As indicated by the labels in Figure 7(b):

[0043] 23 is the extension;

[0044] Figure 8 As indicated by the standard number:

[0045] 25 is the upper stator winding lead, 26 is the lower stator winding lead, 27 is the connection solder joint between the upper and lower stator winding leads, and 28 is the motor lead. Detailed Implementation

[0046] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0047] Example 1

[0048] like Figure 3As shown, this utility model discloses an axial double-stator motor, comprising a motor base 12, a rotor 6, an upper stator 2, a lower stator 11, an upper wire guard 15, and a lower wire guard 16. The rotor 6 is located between the upper stator 2 and the lower stator 11, which are respectively fixed to one end face of the motor base 12. The upper wire guard 15 and the lower wire guard 16 are located between the upper stator 2 and the lower stator 11. The upper wire guard 15 has a first groove 18 for guiding and fixing the upper stator winding lead 25, and the lower wire guard 16 has a second groove 21 for guiding and fixing the lower stator winding lead 26.

[0049] In this invention, an upper wire protection sleeve 15 and a lower wire protection sleeve 16 are introduced between the two stators in the motor lead wire, forming an interval layout of upper stator-upper wire protection sleeve-lower wire protection sleeve-lower stator-base, which avoids interference with the rotor in the middle and improves the reliability of the motor lead wire.

[0050] Meanwhile, grooves are provided on the upper wire protection sleeve 15 and the lower wire protection sleeve 16 of this utility model to provide a guiding and fixing path for the winding lead-out, effectively protecting the winding lead-out and eliminating internal flying wires.

[0051] Example 2:

[0052] like Figure 4 and Figure 5 The diagram shows the detailed structure of an axial dual-stator motor according to this utility model. The motor includes an upper stator 2, a rotor 6, a lower stator 11, a stator support column 5, a base 12, and a PCBA 13. The rotor 6 is a non-circular rotor, and both the upper stator 2 and the lower stator 11 are non-circular stators. By using non-circular stators and rotors, and because the load mounting part is located close to the shaft, the load can be installed very close to the shaft, resulting in smaller motor inertia and load inertia. This not only reduces the torque requirements of the motor and increases the acceleration and deceleration speed of the motor, but also improves the control accuracy of the motor.

[0053] Additionally, PCBA13 is detachably fixed to the back of base 12 by PCBA fixing screws 14, and lower stator 11 is fixed to the front of base 12 by lower stator mounting screws 8. Upper stator 2 is spaced apart from lower stator 11 by three stator support columns 5 on one side of the front of base 12, and upper stator 2 is fixed to the end of stator support column 5 away from base 12 by upper stator mounting screws 1. Rotor 6 is located between upper stator 2 and lower stator 11, and bearing assembly 7 is assembled at the central axis of rotor 6 to achieve stable rotation of rotor 6. Upper stator 2 has an upper frame 3 on its inner side, and upper stator winding 4 is wound on the upper frame 3. Lower stator 11 has a lower frame 10 on its inner side, and lower stator winding 9 is wound on the lower frame 10.

[0054] To achieve wire guidance and fixation, this utility model adds an upper wire sheath 15 and a lower wire sheath 16 to the above-mentioned basic structure. Both are made of insulating materials, such as PA, ABS, PBT and other plastic materials, to isolate electrical connections and improve electrical safety and reliability. At the same time, the upper wire sheath 15 and the lower wire sheath 16 are located between the upper stator 2 and the lower stator 11, and the whole assembly is fixed by the stator support column 5.

[0055] In this invention, an upper wire sleeve 15 and a lower wire sleeve 16 are introduced between the two stators in the motor lead wire to avoid interference with the intermediate rotor and improve the reliability of the motor lead wire.

[0056] Example 3:

[0057] like Figures 6-8 The following diagram further illustrates the specific structure and functional implementation of the upper and lower wire sheaths of this utility model:

[0058] (1) Structure and function of the upper sheath 15

[0059] Assembly and Fixing Structure: The specific structure of the upper wire sheath 15 is adapted to the requirements of the lead-out guide of the upper stator winding 4 and the subsequent solder joint accommodation. Multiple first through holes 17 are evenly opened along the circumferential direction on the upper wire sheath 15, preferably three. Each first through hole 17 corresponds one-to-one with the stator support column 5 of the motor, and the diameter of the first through hole 17 is slightly larger than the outer diameter of the stator support column 5, forming a clearance fit. During assembly, the first through holes 17 of the upper wire sheath 15 are respectively fitted onto the outside of the stator support column 5. Then, adhesive is applied to the gap between the first through hole 17 and the stator support column 5 to firmly connect the upper wire sheath 15 to the stator support column 5, preventing the upper wire sheath 15 from moving axially or circumferentially along the support column. Figure 6 As shown.

[0060] Upper stator winding lead-out guiding structure: The upper end face of the upper guard sleeve 15 is provided with a through first groove 18, wherein the first groove 18 is preferably a radial groove, and the position of the first groove 18 corresponds to the upper stator winding lead-out 25 respectively; during assembly, the enameled wires led out from the upper stator winding 4, i.e. the upper stator winding lead-out 25, are respectively embedded into the first groove 18, and the enameled wires are limited and guided by the side wall of the first groove 18 to avoid the enameled wires from shifting randomly and forming flying wires, and at the same time to prevent the enameled wires from generating unnecessary friction with the upper stator 2 above or the lower guard sleeve 16 below.

[0061] Solder joint accommodating structure: The lower end face of the upper wire sheath 15 corresponds to the end position of the first groove 18 and has an arc-shaped first recess 19. The depth and width of the first recess 19 are designed according to the size of the connection solder joint 27 of the upper and lower stator winding leads, ensuring that the connection solder joint 27 of the upper and lower stator winding leads is completely accommodated in the recess. When the upper stator winding lead 25 and the lower stator winding lead 26 are subsequently welded, the connection solder joint 27 of the upper and lower stator winding leads can be directly located in the first recess 19, avoiding the connection solder joint 27 of the upper and lower stator winding leads protruding from the lower end face of the upper wire sheath 15, thus reserving space for the assembly of the lower wire sheath 16.

[0062] (2) Structure and function of the lower sheath 16

[0063] Assembly and fixing structure: The diameter of the lower wire sheath 16 is the same as that of the upper wire sheath 15. The specific structure simultaneously adapts to the requirements of wire guidance, solder joint fit, and connection between the motor lead wire and PCBA 13 of the lower stator winding 9. Multiple second through holes 20 are evenly opened along the circumferential direction on the lower wire sheath 16. Each second through hole 20 corresponds one-to-one with the stator support column 5, and the diameter of the second through hole 20 is the same as that of the first through hole 17, forming a clearance fit with the stator support column 5. During assembly, the second through holes 20 of the lower wire sheath 16 are fitted onto the outside of the stator support column 5, and glue is applied to fix it at the fit gap between the second through hole 20 and the stator support column 5. Figure 7(a) and 7(b) As shown.

[0064] Lower stator winding lead-out guiding structure: The front of the lower guard sleeve 16 is provided with a through second groove 21, wherein the second groove 21 is preferably a radial groove. The position of the second groove 21 corresponds to the lower stator winding lead-out 26 and is aligned with the first groove 18 of the upper guard sleeve 15. During assembly, the enameled wires led out from the lower stator winding 9, i.e., the lower stator winding lead-out 26, are respectively embedded in the second groove 21 and guided through the second groove 21 to the position corresponding to the first groove 18, so as to facilitate subsequent alignment and welding with the upper stator winding lead-out 25.

[0065] Solder joint fitting structure: The front of the lower wire sheath 16 corresponds to the end position of the second groove 21, and a second recess 22 is provided that matches the first recess 19. The shape and size of the second recess 22 are completely consistent with the first recess 19. When the upper and lower wire sheaths are assembled, the first recess 19 and the second recess 22 fit together to form a complete solder joint accommodating space. During welding, the upper stator winding output 25 and the lower stator winding output 26 are connected in the assembled accommodating space. The connection solder joint 27 of the upper and lower stator winding outputs is simultaneously wrapped by the first recess 19 and the second recess 22, which prevents the connection solder joint 27 of the upper and lower stator winding outputs from protruding from the outer edge of the wire sheath and interfering with the rotor 6. The wire sheath also protects the connection solder joint 27 of the upper and lower stator winding outputs, preventing the connection solder joint 27 of the upper and lower stator winding outputs from falling off due to vibration.

[0066] In this embodiment, the first recess 19 and the second recess 22 can be provided separately or both can exist simultaneously. All three cases can be achieved, and it is more preferable that both exist simultaneously.

[0067] like Figure 8 As shown, the motor lead wire guiding and PCBA connection structure is as follows: The back of the lower cable sleeve 16 has an extension 23. The length of the extension 23 is designed so that its bottom can extend to the front of the PCBA 13. Right-angle grooves 24 are provided on the upper end and side of the extension 23. During assembly, the motor lead wire 28 is guided from the front of the lower cable sleeve 16 to the bottom of the extension 23 along the right-angle groove 24, and finally welded and fixed to the corresponding welding point on the front of the PCBA 13 to realize the electrical connection between the motor winding and the PCBA 13. The right-angle structure of the right-angle groove 24 can keep the lead wire fixed when turning, avoid the lead wire from shifting due to its own tension, and prevent the lead wire from being damaged by friction with the base 12 or the lower stator 11.

[0068] This utility model solves the problems of wire interference and flying wires in existing motors by adding upper and lower wire protection sleeves, using grooves to guide and fix various types of outgoing wires, and using recessed parts to accommodate solder joints. At the same time, it stabilizes the lead wire welding tension, improves connection reliability, and adapts to the usage requirements of axial double stator motors.

[0069] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An axial double-stator electric machine comprising a machine base (12), a rotor (6), an upper stator (2) and a lower stator (11), the rotor (6) being located between the upper stator (2) and the lower stator (11), the upper stator (2) and the lower stator (11) being fixed on an end face of the machine base (12), respectively, characterized in that, The motor also includes an upper wire sheath (15) and a lower wire sheath (16) located between the upper stator (2) and the lower stator (11), respectively; The upper wire sheath (15) is provided with a first groove (18) for guiding and fixing the upper stator winding lead (25); the lower wire sheath (16) is provided with a second groove (21) for guiding and fixing the lower stator winding lead (26).

2. An axial dual stator electric machine according to claim 1, characterized in that, The lower cable sleeve (16) is provided with an extension (23), and the extension (23) has a right-angled groove (24) for guiding the motor lead wire (28) to the other end face of the motor base (12).

3. An axial dual stator electric machine according to claim 1, characterized in that, The upper wire sleeve (15) is provided with a first recess (19), which forms a receiving space for accommodating the connection solder joint (27) of the upper and lower stator winding leads. Alternatively, the lower wire sleeve (16) is provided with a second recess (22), which forms a receiving space for accommodating the connection solder joint (27) of the upper and lower stator winding leads; Alternatively, the upper wire sheath (15) is provided with a first recess (19), and the lower wire sheath (16) is provided with a second recess (22) corresponding to the first recess (19). The first recess (19) and the second recess (22) together form a receiving space for accommodating the connection solder joint (27) of the upper and lower stator winding leads.

4. An axial dual stator electric machine according to claim 3, characterized in that, The depth of the first recess (19) and the second recess (22) is greater than the height of the connection solder joint (27) of the upper and lower stator winding leads.

5. An axial dual stator electric machine according to claim 1, characterized in that, The motor also includes a stator support column (5) located between the upper stator (2) and the lower stator (11), the stator support column (5) passing through the upper wire sleeve (15) and the lower wire sleeve (16) respectively.

6. An axial dual stator electric machine according to claim 5, characterized in that The upper wire sheath (15) is provided with a first through hole (17) that cooperates with the stator support column (5), and the lower wire sheath (16) is provided with a second through hole (20) that cooperates with the stator support column (5).

7. An axial dual stator electric machine according to claim 6, characterized in that The first through hole (17) and the second through hole (20) are respectively clearance fit with the stator support column (5) and are fixed by adhesive application.

8. An axial dual stator electric machine according to claim 1, characterized in that Both the upper sheath (15) and the lower sheath (16) are components made of insulating material.

9. An axial dual stator electric machine according to claim 2, characterized in that, The first groove (18) and the second groove (21) each have three, which are used to guide the three-phase winding leads respectively; the right-angle groove (24) has three, which are used to guide the three-phase motor leads respectively.

10. The axial dual stator electric machine of claim 1, wherein, The rotor (6) is a non-circular rotor, and the upper stator (2) and lower stator (11) are both non-circular stators.

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