A rotary steering switch and a single-phase motor comprising the same.
The rotary steering switch enables flexible steering switching of single-phase motors, solving the problems of high inventory costs and complex operation. Users can change the steering direction themselves, ensuring the reliability and safety of electrical connections.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU LIHENG ELECTRIC CO LTD
- Filing Date
- 2025-08-12
- Publication Date
- 2026-06-30
AI Technical Summary
The fixed rotation direction of existing single-phase asynchronous motors necessitates the stocking of both forward and reverse versions, increasing inventory costs. When users replace them, a professional electrician is required, and incorrect wiring is easy to occur, posing a risk of motor burnout. Traditional terminal blocks are inconvenient to operate and prone to poor contact.
Design a rotary steering switch that achieves motor steering switching through the cooperation of a knob and a U-shaped conductor. The U-shaped conductor is fixedly connected to the insert, and the knob limit ensures accurate steering. The operation is simple.
It enables flexible switching of motor direction, reduces inventory costs, allows users to change the direction themselves without the need for professional electricians, avoids poor contact, and improves the reliability and safety of electrical connections.
Smart Images
Figure CN224438685U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor design technology, and in particular to a rotary steering switch and a single-phase motor containing the same. Background Technology
[0002] In the application of single-phase asynchronous motors, the ability to flexibly and conveniently change the motor's rotation direction is a common and critical requirement. Because single-phase fan motors have a fixed rotation direction, manufacturers are forced to stock both forward and reverse versions, increasing inventory costs. Users are also constrained by the rotation direction when replacing them. Furthermore, the motor's rotation direction is strongly tied to the fan impeller. Traditional solutions often require users to open the motor junction box and manually swap the leads of the main winding or starting winding. Moreover, this requires a professional electrician; ordinary users are prone to incorrect wiring, which can seriously damage the motor, increasing downtime and maintenance costs.
[0003] CN100553077C is a quick-change voltage terminal block that allows for motor direction switching by modifying the circuit and using the same terminal block structure. However, this patented terminal block still has some problems: 1. Its U-shaped conductor is fixed to the voltage selection device, and other electrical components are connected through the movement of the U-shaped conductor. The U-shaped conductor is a moving part, and its connection with other electrical components is open, without structural constraints, which can easily lead to poor contact after prolonged use. 2. The voltage selection device needs to be rotated a certain angle to align with the voltage indicator, which is inconvenient to operate. Utility Model Content
[0004] To address the technical problems of inconvenient operation and poor contact caused by existing wiring boards used for voltage switching, this utility model provides a rotary steering switch and a single-phase motor containing it to solve the above problems.
[0005] This utility model proposes a rotary steering switch, including a main body, an insert, and a knob. The main body includes a main board and a columnar boss located at one end of the main board. The main board has wiring lines. The columnar boss has a receiving cavity inside. Three insert slots and one mounting slot are arranged in an array on the circumferential side of the columnar boss, communicating with the receiving cavity. The insert slots are used to install inserts, and the mounting slot is used to install terminals from the external wiring lines. The insert is located in the receiving cavity and rotates with the main body. Two parallel U-shaped conductors are fixed on the insert. The two ends of the two U-shaped conductors contact the terminals and the three inserts respectively, so that the U-shaped conductors, inserts, wiring lines, and external power supply form a closed circuit. The knob is located outside the columnar boss. The knob has a connecting post that passes through the main body and is fixedly connected to the insert. Rotating the knob switches the two U-shaped conductors to contact different inserts.
[0006] In an optional embodiment of this utility model, the insert has a non-cylindrical hole at its center, and the connecting post mates with the non-cylindrical hole.
[0007] In an optional embodiment of this invention, the top of the insert has a U-shaped groove for mounting a U-shaped conductor.
[0008] In an optional embodiment of this utility model, the insert groove is located inside the columnar boss, and the insert is inserted from the bottom opening of the insert groove.
[0009] In an optional embodiment of this utility model, the terminal block includes a bent portion and a plug portion. The mounting groove is located outside the columnar boss. The mounting groove includes a slot for accommodating the plug portion and two baffles located outside the slot. An opening for the bent portion to pass through is formed between the two baffles. The slot communicates with the accommodating cavity.
[0010] In an optional embodiment of this invention, each insert slot has a protrusion on the outer side of the columnar boss surface.
[0011] In an optional embodiment of this utility model, the knob is located on the top of the columnar boss, the top of the columnar boss is provided with a limiting post, and the knob has an arc-shaped groove for the limiting post to pass through; when the limiting post switches between the two ends of the arc-shaped groove, the single-phase motor realizes the direction switching.
[0012] In an optional embodiment of this utility model, the outer periphery of the knob is provided with anti-slip teeth.
[0013] In an optional embodiment of this utility model, the end of the connecting column is provided with an elastic buckle, which abuts against the bottom of the insert.
[0014] This utility model also proposes a single-phase motor, including the above-mentioned rotary steering switch, wherein the rotary steering switch is located between the rear end cover and the rear cover of the single-phase motor and is fixed to the rear end cover.
[0015] In an optional embodiment of this utility model, the end face of the rear cover has a protruding fixing post, the side of the cavity formed by the rear cover and the rear cover has a wire outlet hole, and the main body has a mounting hole that mates with the fixing post.
[0016] The beneficial effects of this utility model are:
[0017] (1) This utility model provides multiple insert slots on the circumferential side of the columnar boss to fix the inserts and connect the inserts to other electrical components. When switching, only the U-shaped conductor rotates, changing the inserts that are in contact at both ends of the U-shaped conductor. The inserts that connect the electrical components remain fixed. Furthermore, the U-shaped conductor and the insert are surrounded in the receiving cavity, so there will be no positional shift or structural deformation, thus ensuring the reliability of the electrical connection.
[0018] (2) This utility model uses the limiting post on the column-shaped protrusion and the arc groove of the knob to play a limiting role. The user only needs to rotate to the limit position of the arc groove in the indicated direction to realize the steering switch, which is convenient to operate. Attached Figure Description
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0020] Figure 1 This is an exploded view of a specific embodiment of the rotary steering switch described in this utility model;
[0021] Figure 2 This is a perspective view of a specific embodiment of the rotary steering switch described in this utility model;
[0022] Figure 3 yes Figure 2 Enlarged view of point a in the middle;
[0023] Figure 4 This is a front view of a specific embodiment of the rotary steering switch described in this utility model;
[0024] Figure 5 yes Figure 4 BB-direction sectional view;
[0025] Figure 6 yes Figure 4 DD section view;
[0026] Figure 7 This is a bottom view of a specific embodiment of the rotary steering switch described in this utility model;
[0027] Figure 8 This is a schematic diagram showing the position of the U-shaped conductor when the arrow on the limiting post points to CW;
[0028] Figure 9 yes Figure 8 A schematic diagram of the circuit connection in the shown state;
[0029] Figure 10 This is a schematic diagram showing the position of the U-shaped conductor when the arrow on the limiting post points to CCW;
[0030] Figure 11 yes Figure 10 A schematic diagram of the circuit connection in the shown state;
[0031] Figure 12 This is a schematic diagram of the assembly of the rotary steering switch described in this utility model in a single-phase motor.
[0032] In the diagram, 1. Main body; 101. Main board; 102. Columnar boss; 2. Insert; 201. Non-cylindrical hole; 202. U-shaped groove; 3. Knob; 4. Receiving cavity; 5. Insert slot; 6. Mounting slot; 601. Slot; 602. Baffle; 7. C2 insert; 8. Terminal block; 801. Bend; 802. Plug-in part; 9. U-shaped conductor; 10. Connecting post; 11. A1 insert; 12. A2 insert; 13. L1 14. L2 insert, 15. Wiring screw, 16. C1 insert, 17. M1 insert, 18. M2 insert, 19. Elastic snap, 20. Protrusion, 21. Limiting post, 22. Arc groove, 23. Anti-slip teeth, 24. Rear end cover, 25. Rear cover, 26. Rotary steering switch, 27. Fixing post, 28. Cable outlet hole, 29. Mounting hole, 30. Support post, 31. Positioning post, 32. Positioning hole, 33. Mounting post. Detailed Implementation
[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0034] Example 1
[0035] like Figures 1-5 As shown, a rotary turn signal switch includes a main body 1, an insert 2, and a knob 3. The main body 1 includes a main board 101 and a columnar boss 102 located at one end of the main board 101. The main board 101 is an injection-molded plate-shaped body with wiring lines. The columnar boss 102 has a receiving cavity 4 inside. Three insert slots 5 and one mounting slot 6 communicating with the receiving cavity 4 are arranged in an array on the circumferential side of the columnar boss 102. The insert slots 5 are used to install inserts, and the mounting slot 6 is used to install terminals 8 in the external wiring lines. The insert 2 is located in the receiving cavity 4 and rotates with the main body 1. Two parallel U-shaped conductors 9 are fixed on the insert 2. The two ends of the two U-shaped conductors 9 are in contact with the terminals 8 and the three inserts, respectively, so that the U-shaped conductors 9, inserts, wiring lines and external power supply are connected to form a closed circuit. The receiving cavity 4 can effectively limit the position of the insert 2 and protect the U-shaped conductors 9.
[0036] The knob 3 is located outside the columnar boss 102. The knob 3 has a connecting post 10 that passes through the main body 1 and is fixedly connected to the insert 2. Rotating the knob 3 switches the two U-shaped conductors 9 to contact different inserts. During the rotation of the U-shaped conductors 9, the inserts remain fixed. By connecting the inserts to electrical components, poor contact can be avoided.
[0037] The wiring circuit consists of multiple terminals, electrical components, and wires. The electrical components can be capacitors, windings, etc. The wiring circuit is connected to a power source. The wiring method of the wiring circuit, the three plugs, and the two U-shaped conductors 9 is the same as that in patent number CN100553077C. Figure 1 As shown, the three inserts are named C2 insert 7, A1 insert 11, and A2 insert 12 respectively. A1 insert 11 and A2 insert 12 are located on both sides of the terminal 8 in the circumferential direction of the columnar boss 102, and C2 insert 7 is directly opposite the terminal 8.
[0038] The wiring diagram is as follows: Figure 4 The L1 connector 13 and L2 connector 14, located on the front of the motherboard 101, can be connected to the power supply using spring-loaded terminals. A wiring screw 15 is also provided to secure the power cable to the one-piece connector. These two power connection methods are very convenient. Figure 1 , Figure 2 , Figure 6 As you can see, L1 connector 13, C1 connector 16, and M1 connector 17 are integrally formed and can be considered to be connected in series. Similarly, L2 connector 14 is connected to M2 connector 18 and terminal 8. C1 connector 16 and C2 connector 7 are used to insert the two springs of the capacitor; A1 connector 11 and A2 connector 12 are used to insert the springs at both ends of the auxiliary winding of the motor; and M1 connector 17 and M2 connector 18 are used to insert the springs at both ends of the main winding of the motor. Knob 3 rotates the U-shaped conductor 9 inside the insert 2. When the U-shaped conductor 9 is in the first working position (assuming the motor is rotating forward), the position of the U-shaped conductor 9 is as follows... Figure 8 As shown, the circuit connection method between the U-shaped conductor 9 and the wiring circuit is as follows: Figure 9 As shown, when the U-shaped conductor 9 is in the second working position (at which time the motor reverses), the position of the U-shaped conductor 9 is as follows: Figure 10 As shown, the circuit connection method between the U-shaped conductor 9 and the wiring circuit is as follows: Figure 11 As shown.
[0039] The insert 2 is connected to the knob 3 via the connecting post 10, so that the insert 2 and the knob 3 rotate synchronously. Specifically, the following connection structure can be adopted:
[0040] The insert 2 has a non-cylindrical hole 201 at its center, and the connecting post 10 mates with the non-cylindrical hole 201. For example... Figure 1 and Figure 6As shown, the non-cylindrical hole 201 at the center of the insert 2 is a hexagonal hole, and the connecting post 10 is also a corresponding hexagonal prism. The end of the connecting post 10 is provided with an elastic buckle 19, which rests against the bottom of the insert 2. The elastic buckle 19 can radially contract and expand. During installation, the elastic buckle 19 is inserted from above the non-cylindrical hole 201. The elastic buckle 19 deforms within the non-cylindrical hole 201, and after passing through the non-cylindrical hole 201, it returns to its original shape and rests against the bottom of the insert 2. The insert 2 is fixed by being pressed between the elastic buckle 19 and the top of the columnar boss 102.
[0041] Installation of U-shaped conductor 9:
[0042] The top of the insert 2 has a U-shaped groove 202 for mounting the U-shaped conductor 9. (See example...) Figure 1 and Figure 5 As shown, the U-shaped groove 202 is located on the top and side of the insert 2, and the two ends of the U-shaped conductor 9 contact the insert or terminal 8 on the side of the insert 2. Since the insert 2 is located inside the receiving cavity 4, the U-shaped conductor 9 can be stably limited under the cover of the columnar boss 102 and the U-shaped groove 202, and will not shift its position during rotation, thereby ensuring effective contact with the insert or terminal 8.
[0043] Design of slot 5:
[0044] like Figure 5 and Figure 6 As shown, the insert slot 5 is located inside the columnar boss 102, and the insert is inserted through the bottom opening of the insert slot 5. The inserts refer to insert A1 11, insert A2 12, and insert C2 7. Since these three inserts are simple sheet-like structures, they can be inserted through the bottom opening of the insert slot 5. The lower part of the insert extends out of the insert slot 5 and connects to other electrical components via wires. The outer side of the columnar boss 102, where the insert slot 5 is located, is a closed structure, providing good protection for the inserts inside. In a preferred embodiment, each insert slot 5 has a protrusion 20 on the outer side of the columnar boss 102. The protrusion 20 serves as a marker, indicating the location of the insert. Simultaneously, the protrusion 20 ensures the thickness of the columnar boss 102, preventing thinning of the columnar boss 102 at that location due to the design of the insert slot 5, which would affect the structural strength.
[0045] Design of mounting slot 6:
[0046] The terminal block 8 is connected to the substrate and is not a simple sheet structure. The substrate is attached to the surface of the main body 1. The terminal block 8 and the L2 insert 14 are bent upwards or downwards from the substrate. The terminal block 8 includes a bent portion 801 connected to the substrate and a plug portion 802 connecting the bent portion 801. Since the L2 insert 14 is located outside the columnar boss 102, the mounting groove 6 cannot be completely hidden inside the columnar boss 102. Figure 3and Figure 6 As shown, the mounting groove 6 is located outside the columnar boss 102. The mounting groove 6 includes a slot 601 for accommodating the plug-in portion 802 and two baffles 602 located outside the slot 601. An opening is formed between the two baffles 602 for the bending portion 801 to pass through. The slot 601 communicates with the receiving cavity 4. During installation, the terminal 8 is inserted into the mounting groove 6 from top to bottom, and the L2 insert 14 moves downward together to the surface of the main body portion 1.
[0047] Example 2
[0048] Based on Embodiment 1, the knob 3 is located at the top of the columnar boss 102, and the top of the columnar boss 102 is provided with a limiting post 21. The knob 3 has an arc-shaped groove 22 through which the limiting post 21 passes. The limiting post 21 is a fixed component fixed on the columnar boss 102. When the knob 3 rotates, the limiting post 21 remains stationary. Therefore, the limiting post 21 will move along the arc-shaped groove 22. When the limiting post 21 switches between the two ends of the arc-shaped groove 22, the single-phase motor achieves direction switching. Figure 2 As shown, one end of the arc-shaped groove 22 is marked with CW, and the other end with CCW. The end of the limiting post 21 is marked with an arrow. When the arrow on the limiting post 21 points to CW on the knob 3, the energized motor rotates clockwise when viewed from the output shaft end. The position of the U-shaped conductor 9 and the circuit connection method are shown in [reference needed]. Figure 8 and Figure 9 When knob 3 is rotated 90° counterclockwise, the arrow on limit post 21 indicates the CCW on knob 3, and U-shaped conductor 9 will rotate 90° counterclockwise under its influence. The position of U-shaped conductor 9 and its circuit connection method are shown in [reference needed]. Figure 10 and Figure 11 At this time, the energized motor rotates counterclockwise when viewed from the output shaft end.
[0049] In a preferred embodiment, the outer periphery of the knob 3 is provided with anti-slip teeth 23.
[0050] Example 3
[0051] A single-phase motor, such as Figure 12 As shown, the rotary steering switch 26 described above is located between the rear end cover 24 and the rear cover 25 of the single-phase motor and is fixed to the rear end cover 24.
[0052] By integrating a rotary steering switch 26 at the tail of the single-phase motor, the steering compatibility dilemma of the single-phase motor is completely solved: at the manufacturing end, the need for production of both forward and reverse versions is eliminated, and a single model motor is used instead, reducing inventory costs and production line wiring errors; at the application end, users do not need to match the original steering direction when replacing the motor. After installation, they only need to open the rear cover 25 and rotate the knob 3 90° (completed in 5 seconds) to accurately adapt to the impeller pneumatic direction.
[0053] The following structure is adopted for the installation of the rotary steering switch 26:
[0054] The end face of the rear cover 24 has a protruding fixing post 27, and the side of the cavity formed by the rear cover 24 and the rear cover 25 has a cable outlet hole 28. The main body 1 has a mounting hole 29 that mates with the fixing post 27. Two fixing posts 27 and mounting holes 29 can be provided to securely fix the rotary steering switch 26.
[0055] To expedite installation, this embodiment also includes a positioning structure, such as... Figure 1 , Figure 7 and Figure 12 As shown, the rotary steering switch 26 is positioned. The rear cover 24 is provided with a support post 30. The top of the support post 30 is provided with a positioning post 31 with a smaller diameter. The lower part of the main body 1 is provided with a mounting post 33 with a positioning hole 32. The positioning post 31 is inserted into the positioning hole 32.
[0056] In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiments. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.
[0057] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A rotary steering switch, characterized in that, include: The main body (1) includes a motherboard (101) and a columnar boss (102) located at one end of the motherboard (101). The motherboard (101) is provided with wiring lines. The columnar boss (102) has a receiving cavity (4) inside. The columnar boss (102) has three insert slots (5) and one mounting slot (6) arranged in an array on its circumferential side, which are connected to the receiving cavity (4). The insert slots (5) are used to install inserts, and the mounting slot (6) is used to install the wiring terminals (8) in the external wiring lines. The insert (2) is located in the receiving cavity (4) and rotates with the main body (1). Two parallel U-shaped conductors (9) are fixed on the insert (2). The two ends of the two U-shaped conductors (9) are in contact with the terminal (8) and the three inserts, respectively. The knob (3) is located outside the columnar boss (102). The knob (3) has a connecting post (10) that passes through the main body (1) and is fixedly connected to the insert (2). Rotating the knob (3) switches the two U-shaped conductors (9) to contact different inserts.
2. The rotary steering switch according to claim 1, characterized in that: The insert (2) has a non-cylindrical hole (201) at its center, and the connecting post (10) is engaged with the non-cylindrical hole (201).
3. The rotary steering switch according to claim 1, characterized in that: The top of the insert (2) has a U-shaped groove (202) for mounting a U-shaped conductor (9).
4. The rotary steering switch according to claim 1, characterized in that: The insert slot (5) is located inside the columnar boss (102), and the insert is inserted from the bottom opening of the insert slot (5).
5. The rotary steering switch according to claim 1, characterized in that: The terminal block (8) includes a bent portion (801) and a plug portion (802). The mounting groove (6) is located outside the columnar boss (102). The mounting groove (6) includes a slot (601) for accommodating the plug portion (802) and two baffles (602) located outside the slot (601). An opening is formed between the two baffles (602) for the bent portion (801) to pass through. The slot (601) communicates with the receiving cavity (4).
6. The rotary steering switch according to claim 4, characterized in that: Each insert slot (5) has a protrusion (20) on the outer side of the columnar boss (102).
7. The rotary steering switch according to claim 1, characterized in that: The knob (3) is located on the top of the columnar boss (102), and the top of the columnar boss (102) is provided with a limiting post (21). The knob (3) has an arc-shaped groove (22) through which the limiting post (21) passes. When the limiting post (21) switches between the two ends of the arc-shaped groove (22), the single-phase motor realizes the direction switching.
8. The rotary steering switch according to claim 1, characterized in that: The end of the connecting post (10) is provided with an elastic buckle (19), which abuts against the bottom of the insert (2).
9. A single-phase motor, characterized in that: Includes the rotary steering switch (26) according to any one of claims 1-8, the rotary steering switch (26) being located between the rear end cover (24) and the rear cover (25) of the single-phase motor and being fixed to the rear end cover (24).
10. The single-phase motor according to claim 9, characterized in that: The end face of the rear cover (24) has a protruding fixing post (27), the side of the cavity formed by the rear cover (24) and the rear cover (25) has a wire outlet hole (28), and the main body (1) has a mounting hole (29) that cooperates with the fixing post (27).