Stepping motor wire plugging structure and stepping motor structure

Abstract

The utility model provides a stepping motor plug wire structure and a stepping motor structure, belonging to the technical field of power equipment, the stepping motor plug wire structure comprises a junction box, a PIN terminal and a coil assembly, the junction box is internally provided with a plug wire female seat, the PIN terminal forms an S-shaped structure after being bent, and is fixedly connected to the plug wire female seat; the PIN terminal comprises a first connecting end and a second connecting end which are arranged oppositely, the first connecting end is electrically connected with the coil assembly, and the second connecting end is used for being electrically connected with the plug. According to the utility model, the existing PCB is cancelled, welding is not needed in the assembly process, the reliability of connection between the plug wire head and the PIN terminal is improved by adopting the plug wire structure, the function stability of the stepping motor during operation can be ensured, and automatic production can be realized more easily.

Description

Technical Field

[0001] The utility model belongs to the technical field of power equipment, and relates to a technology for improving a motor wiring method, in particular to a stepping motor wiring structure and a stepping motor structure. Background Art

[0002] A stepper motor is an actuator that converts electrical pulse signals into angular or linear displacement and is widely used in various automation control systems. The operating principles of stepper motors can be categorized into three types: detent torque, energized rotation, and pulse drive. The detent torque is generated by the following principle: when the stator coil is deenergized, the uneven air gap between the rotor and stator assemblies causes the rotor assembly to remain in a stable equilibrium position. The centerline of the rotor magnetic poles deflects by an angle relative to the centerline of the stator magnetic poles, generating a detent torque. The energized rotation principle is as follows: when the coil is energized, the stator segments become magnetized and interact with the rotor magnetic poles, causing like poles to repel and opposite poles to attract. Once the detent torque of the rotor assembly is overcome, a rotational torque is generated, causing the rotor assembly to rotate counterclockwise by 180°. Then, the alternating current input to the coil changes the position of the stator segment magnetic poles, re-interacting with the rotor magnetic poles, causing the rotor assembly to continue to rotate intermittently 180° in a single direction. The principle of pulse drive is as follows: the stepper motor usually performs stepping motion under the drive of bidirectional pulses. The stepper motor driver sends out a driving pulse every second. Under the action of one driving pulse, the rotor rotates 180°. Usually, the stepper motor rotates one circle every 2 seconds. By inputting positive and negative pulses, the rotor rotates in sequence, thereby achieving precise stepping motion.

[0003] From the above analysis of the working principle of the stepper motor, we know that the operation of the stepper motor mainly depends on the input pulse signal. Therefore, the reliable connection of the stepper motor wire group is the basis for ensuring its stable operation. Figure 1 The existing wiring method for stepper motors involves connecting the ends of the wound wire assembly to pin terminals. A printed circuit board (PCB) is then soldered to the PIN terminals to establish a connection between the wire assembly and the PCB. The wire assembly is then soldered to the PCB and extended to the outside of the stepper motor. This wire assembly connection method requires multiple soldering operations, which can lead to cold joints, false joints, or missing solder joints, causing poor functionality in the stepper motor. Utility Model Content

[0004] In view of the technical problem described in the above background technology, when conducting and wiring the existing stepper motor, the wire group needs to be welded multiple times, and there are problems such as cold welding, false welding or leaking welding in actual operation, which leads to poor functionality of the stepper motor. To solve this technical problem, the utility model proposes a stepper motor wire plug structure and a stepper motor structure.

[0005] This utility model improves upon the existing conductive wiring method used in stepper motors, creating a plug-in structure. The PIN terminals are bent into an S-shape, with one end electrically connected to the plug-in connector and the other to the wire assembly. This eliminates the need for soldering during assembly by eliminating the existing PCB circuit board. The plug-in structure also improves the reliability of the connection between the plug-in connector and the PIN terminals, ensuring functional stability during stepper motor operation.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The utility model provides a stepper motor wire plugging structure, comprising a junction box, a PIN pin terminal and a wire package assembly. A wire plug female socket is provided in the junction box. The PIN pin terminal is bent into an S-shaped structure and is fixedly connected to the wire plug female socket.

[0008] The PIN terminal includes a first connection end and a second connection end that are arranged in opposite directions. The first connection end is electrically connected to the wire package component, and the second connection end is used to be electrically connected to the plug head.

[0009] It is further defined that the plug connector is plugged into the junction box and is snap-connected to the junction box via a snap-connecting portion;

[0010] The snap-fit connection portion includes a first snap-fit connection portion, which includes a snap-fit socket located on the junction box and a clamping block located on the plug-in connector; when the plug-in connector is plugged into the junction box, the clamping block extends into the snap-fit socket to fix the plug-in connector to the junction box.

[0011] It is further defined that the snap connection portion also includes a second snap connection portion, which is located at the insertion port of the junction box; when the plug-in head is plugged into the junction box, the tail of the plug-in head abuts against the second snap connection portion to limit the plug-in head.

[0012] It is further defined that the junction box includes a lower box body and an upper box body located above the lower box body, the lower box body and the upper box body enclose a wiring cavity, the wire socket and the second connection end are both located in the wiring cavity, and the wire head is inserted in the wiring cavity and electrically connected to the second connection end.

[0013] It is further defined that the head of the wire plug is provided with an introduction chamfer and a guide chamfer. The introduction chamfer is arranged along the insertion direction of the wire plug and is used to guide the wire plug into the wiring cavity; the guide chamfer is arranged at an angle to the insertion direction of the wire plug and is used to guide the position of the wire plug in the wiring cavity.

[0014] It is further defined that the female socket is provided with a plurality of card slots; the PIN terminals are at least two, and the number of the card slots is not less than the number of the PIN terminals;

[0015] A PIN terminal is correspondingly connected in each of the card slots.

[0016] The utility model also provides a stepper motor structure, comprising a housing, a rotor assembly, a stator assembly, a power output assembly and the above-mentioned stepper motor wiring structure, wherein the rotor assembly and the stator assembly are both located in the housing;

[0017] The stator assembly is a hollow structure, the rotor assembly is located in the hollow structure, the power output assembly is connected to the rotor assembly, and the power output assembly at least partially extends out of the casing;

[0018] The wire package assembly is wound on the stator assembly; the junction box is fixed on the outside of the casing; the female socket is fixed on the stator assembly and extends into the junction box.

[0019] It is further defined that the stator assembly includes an injection molded part and a center plate, the center plate is integrally injection molded inside the injection molded part, the injection molded part and the center plate are both hollow structures, and the rotor assembly is at least partially located in the hollow structure of the center plate.

[0020] It is further defined that the rotor assembly includes a casing axis and a magnet assembly, and the casing axis and the magnet assembly are both located at least within the hollow structure of the center pole plate, and the casing axis is installed on the central axis of the magnet assembly; wherein, one end of the casing axis is riveted to the casing through a pressure ring, and the other end of the casing axis is connected to the power output assembly.

[0021] It is further defined that the stepper motor structure further includes a spring, and the spring is located at the connection portion between the housing axis and the housing.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. This utility model provides a plug-in structure for a stepper motor. This improves upon the existing conductive wiring method used for stepper motors, creating a plug-in structure in which the PIN terminals are bent into an S-shape, with one end electrically connected to the plug-in connector and the other end to the wire assembly. This eliminates the need for soldering during assembly by eliminating the existing PCB circuit board. The plug-in structure also improves the reliability of the connection between the plug-in connector and the PIN terminals, ensuring functional stability during stepper motor operation and facilitating automated production.

[0024] 2. In the present invention, the plug connector and the junction box are fixed by means of a snap connection. The snap connection portion includes a first snap connection portion and a second snap connection portion. The plug connector and the junction box are fixedly connected by the first snap connection portion, and the plug connector and the junction box are limited by the second snap connection portion, thereby improving the reliability of the connection between the plug connector and the junction box, and further ensuring the functional stability of the stepper motor during operation.

[0025] 3. The utility model is provided with an introduction chamfer and a guiding chamfer on the wire plug. The introduction chamfer is used to guide the wire plug into the wiring cavity, making it easier for the wire plug to be inserted into the wiring cavity; the guiding chamfer is used to correct the position of the wire plug in the wiring cavity, so that the wire plug and the PIN terminal are stably connected, avoiding the wire plug from being skewed, resulting in poor contact between the wire plug and the PIN terminal.

[0026] 4. The utility model provides a stepper motor structure in which the center plate is integrally injection-molded inside the injection-molded part. The integral injection molding can stabilize the structure of the stator assembly and realize an automated production mode. The injection-molded part is wrapped around the inner periphery of the center plate (iron core) to play an insulating role.

[0027] 5. The utility model rivets the casing axis and the casing by means of interference fit through a pressure ring, thereby ensuring the verticality of the casing axis after assembly and the pull-out strength of the stepper motor structure; the spring clip is connected to the connection between the casing axis and the casing, and the spring clip will be subjected to force from the magnet assembly, eliminating the axial clearance of the casing axis and ensuring the stability of the magnetic field effect of the rotor assembly during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the connection between a wire group and a PCB circuit board in the prior art;

[0029] Figure 2 This is a schematic diagram of the external structure of the stepping motor structure of the utility model;

[0030] Figure 3 This is a connection diagram of the female socket and the PIN terminal;

[0031] Figure 4 is a schematic diagram of the junction box;

[0032] Figure 5 This is a schematic diagram of the internal structure of the stepping motor structure of the utility model;

[0033] Figure 6 is a structural diagram of the stator assembly;

[0034] Figure 7 It is a structural diagram of the PIN terminal;

[0035] Figure 8 Schematic diagram of the connection between the plug and the junction box Figure 1 ;

[0036] Figure 9 Schematic diagram of the connection between the plug and the junction box Figure 2 ;

[0037] Figure 10 is a structural schematic diagram of the first buckle connection part;

[0038] Figure 11 Schematic diagram of the connection between the plug and the junction box Figure 3 ;

[0039] Figure 12 It is a structural diagram of the plug head;

[0040] Description of reference numerals:

[0041] 1- housing, 2- junction box, 201- female socket, 202- lower box body, 203- upper box body, 204- bayonet, 3- take-out plate, 4- output shaft, 5- PIN terminal, 501- first connection end, 502- second connection end, 6- housing axis, 7- spring clip, 8- magnet assembly, 9- stator assembly, 10- middle plate, 11- gear plate, 12- friction gasket, 13- output gear, 14- gear assembly, 15- wire group, 16- wire package assembly, 17- plug head, 1701- block, 1702- import chamfer, 1703- guide chamfer, 18- first snap connection part, 19- second snap connection part. DETAILED DESCRIPTION

[0042] The technical solution of the present invention will be further explained below with reference to the accompanying drawings and embodiments, but the present invention is not limited to the embodiments described below.

[0043] See also Figure 2 、 Figure 3 、 Figure 4 and Figure 7The present invention provides a stepper motor wire plugging structure, including a junction box 2, a PIN pin terminal 5 and a wire package component 16. A wire plug-in socket 201 is provided in the junction box 2, and the wire plug-in socket 201 is arranged opposite to the insertion port of the junction box 2. The PIN pin terminal 5 is bent to form an S-shaped structure and is fixedly connected to the wire plug-in socket 201. Preferably, the PIN pin terminal 5 needs to be bent twice, and the bending angle is 90°; the PIN pin terminal 5 includes a first connection end 501 and a second connection end 502 arranged in opposite directions, the first connection end 501 is arranged toward the wire package component 16, and the second connection end 502 is arranged toward the insertion port of the junction box 2. The first connection end 501 is electrically connected to the wire package component 16, and the second connection end 502 is used to electrically connect to the wire plug head 17; the wire plug head 17 is plugged into the junction box 2 and is snap-connected to the junction box 2 through a snap-on connection portion. The snap-on connection can improve the reliability of the connection between the junction box 2 and the wire plug head 17, and improve the functional stability during the operation of the stepper motor.

[0044] The utility model is provided with a plurality of card slots on the female socket 201; there are at least two PIN pin terminals 5, and the number of card slots is not less than the number of PIN pin terminals 5; each card slot is correspondingly connected to a PIN pin terminal 5. Figure 8 Connected to the plug connector 17 is a wire assembly 15, which consists of multiple wires. Preferably, the number of wires in the wire assembly 15 matches the number of slots and the number of PIN terminals 5, and during installation, the wires, PIN terminals 5, and slots correspond one to one. Specifically, the portion between the two bends of the PIN terminal 5 is positioned within the slot.

[0045] See also Figure 9 and Figure 10 The snap-fit connection portion of the present invention includes a first snap-fit connection portion 18, which includes a bayonet 204 located on the junction box 2 and a clamping block 1701 located on the wire plug 17. The clamping block 1701 is an inclined surface structure, which facilitates the clamping block 1701 to slide into the bayonet 204, wherein the radial dimension formed by the clamping block 1701 and the wire plug 17 is larger than the radial dimension of the wiring cavity in the junction box 2; when the wire plug 17 is plugged into the junction box 2, the clamping block 1701 extends into the bayonet 204 to fix the wire plug 17 to the junction box 2.

[0046] Preferably, the present invention is provided with bayonet holes 204 on both sides and the bottom of the junction box 2, and clamping blocks 1701 are provided on the wire plug 17 at positions corresponding to the both sides and the bottom of the junction box 2, forming multiple opening parts of the first snap connection parts 18, and snap connection is performed through multiple points, thereby ensuring the stability of the connection between the junction box 2 and the wire plug 17, and the two can be fixed more effectively.

[0047] See also Figure 11The snap-fit connection of the present invention also includes a second snap-fit connection 19, which is located at the insertion port of the junction box 2. When the plug connector 17 is inserted into the junction box 2, the tail of the plug connector 17 abuts against the second snap-fit connection 19, thereby retaining the plug connector 17 in place. Specifically, the second snap-fit connection 19 is located on a side near the wiring cavity of the junction box 2, and when the plug connector 17 is fully inserted into the wiring cavity of the junction box 2, it retains the plug connector 17 in place.

[0048] Preferably, the present invention is provided with second snap-fit connection parts 19 at the top and bottom of the insertion port of the junction box 2 . The multi-point arrangement of the second snap-fit connection parts 19 can improve the stability of limiting the junction box 2 .

[0049] The junction box 2 of the present invention includes a lower box body 202 and an upper box body 203 located above the lower box body 202. The lower box body 202 and the upper box body 203 enclose a wiring cavity. The female socket 201 and the second connection end 502 are both located in the wiring cavity. The wire plug 17 is plugged into the wiring cavity and electrically connected to the second connection end 502.

[0050] See also Figure 12 The present invention provides a guide chamfer 1702 and a guide chamfer 1703 on the head of the plug connector 17. The guide chamfer 1702 is arranged along the insertion direction of the plug connector 17 to guide the plug connector 17 into the wiring cavity. The guide chamfer 1703 is arranged at an angle to the insertion direction of the plug connector 17 to guide the plug connector 17 in the wiring cavity, prevent the plug connector 17 from tilting, and ensure stable contact between the plug connector 17 and the PIN terminal 5. Preferably, the guide chamfer 1703 is arranged at a 90° angle to the insertion direction of the plug connector 17.

[0051] The utility model electrically connects the wire group 15 with the PIN pin terminal 5 by providing a plug-in head 17 and a junction box 2, eliminating the existing PCB circuit board and eliminating the need for soldering during the assembly process. At the same time, the plug-in structure improves the reliability of the connection between the plug-in head 17 and the PIN pin terminal 5, can ensure the functional stability of the stepper motor during operation, and makes it easier to achieve automated production.

[0052] See also Figure 5 The present invention also provides a stepper motor structure, including a casing 1, a rotor assembly, a stator assembly 9, a power output assembly and the above-mentioned stepper motor wire plug-in structure, the rotor assembly and the stator assembly 9 are both located in the casing 1; the stator assembly 9 is a hollow structure, the rotor assembly is located in the hollow structure, the power output assembly is connected to the rotor assembly, and the power output assembly at least partially extends out of the casing 1 for transmitting power outward; the wire package assembly 16 is wound on the stator assembly 9; the junction box 2 is fixed to the outside of the casing 1; the wire plug-in socket 201 is fixed on the stator assembly 9 and extends into the junction box 2.

[0053] The stepper motor structure in the present invention also includes a take-out plate 3, which is located at the opening of the casing 1. The take-out plate 3 and the casing 1 together form a casing cavity, wherein the rotor assembly, the stator assembly 9 and the power output assembly are all located in the casing cavity, and the power output assembly at least partially extends out of the casing 1.

[0054] See also Figure 6 The stator assembly 9 of the present invention includes an injection molded part and a center plate 10. The center plate 10 is integrally injection molded inside the injection molded part. Both the injection molded part and the center plate 10 are hollow structures, and the rotor assembly is at least partially located in the hollow structure of the center plate 10.

[0055] The rotor assembly of the present invention includes a housing shaft 6 and a magnet assembly 8. Both the housing shaft 6 and the magnet assembly 8 are located at least within the hollow structure of the central plate 10, and the housing shaft 6 is mounted on the central axis of the magnet assembly 8. One end of the housing shaft 6 is riveted to the housing 1 via a pressure ring and is rotationally connected to the pressure ring via a bearing. The other end of the housing shaft 6 is connected to the power output assembly and is rotationally connected to the housing 1 via a bearing. Preferably, the housing shaft 6 and the magnet assembly 8 are both located within the hollow structure of the central plate 10 and the injection molded part.

[0056] The stepper motor structure also includes a spring clip 7, which is located at the connection between the housing axis 6 and the housing 1. The spring clip 7 will be subjected to force by the magnet assembly 8 to eliminate the axial gap of the housing axis 6 and ensure the stability of the magnetic field effect of the rotor assembly during rotation.

[0057] In the present utility model, the power output assembly includes a gear plate 11, a friction washer 12, an output gear 13, a gear assembly 14 and an output shaft 4. The gear plate 11, the friction washer 12, the output gear 13 and the gear assembly 14 are all located in the casing cavity; the gear plate 11 is sleeved on the casing axis 6, the gear assembly 14 is connected to the casing axis 6 through the gear plate 11, the output gear 13 is meshed with the gear plate 11, the output gear 13 is fixedly connected to the output shaft 4, and the output shaft 4 at least partially extends outside the casing cavity for transmitting power outward. Mounting grooves are provided on the upper and lower end surfaces of the output gear 13, and friction washer 12 is provided in the mounting groove of the upper end surface and the mounting groove of the lower end surface. The output gear 13 is connected to the output shaft 4 through the friction washer 12. The output gear 13 is squeezed by the friction washer 12. When external force is applied to the output shaft 4 and slippage occurs between the friction washer 12 and the output gear 13, the output gear 13 and the gear assembly 14 will not be damaged.

[0058] It should be noted that the parts of the power output assembly not described in detail in this utility model are all prior art. The core of this utility model is to improve the plug-in structure of the stepper motor, and no improvement is made to the power output assembly.

[0059] The stepper motor structure of the utility model is mainly used for security monitoring cameras, air-conditioning outlet blade swing direction control and related intelligent control occasions.

[0060] The working principle of the stepper motor structure of the present invention is as follows: the wire group 15 is electrically connected (conducted) to the PIN needle terminal 5 through the junction box 2 and the plug head 17, and power is supplied to the wire package component 16. Current is generated in the wire package component 16. By utilizing the principle of electromagnetism, the stator component 9 is magnetized and produces a magnetic pole effect with the rotor component. Like poles repel each other and opposite poles attract each other. When the positioning torque of the rotor component is overcome, a rotational torque is generated, causing the rotor component to rotate counterclockwise by 180°. Then, due to the alternating current input into the coil, the magnetic pole position of the stator component 9 is changed, and a magnetic pole effect is generated with the rotor component again, prompting the rotor component to continue to rotate intermittently by 180° in a single direction, thereby making the stepper motor structure work.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A stepper motor plug-in structure, characterized in that: It comprises a junction box (2), a PIN terminal (5) and a wire package assembly (16), wherein a female socket (201) is provided in the junction box (2), and the PIN terminal (5) is bent to form an S-shaped structure and is fixedly connected to the female socket (201); The PIN terminal (5) comprises a first connection end (501) and a second connection end (502) arranged in opposite directions, the first connection end (501) being electrically connected to the wire package assembly (16), and the second connection end (502) being electrically connected to the plug head (17).

2. The stepping motor wiring structure according to claim 1, characterized in that: The plug head (17) is plugged into the junction box (2) and is snap-connected to the junction box (2) via a snap-connecting portion; The snap-fit connection portion comprises a first snap-fit connection portion (18), wherein the first snap-fit connection portion (18) comprises a snap-fit opening (204) located on the junction box (2) and a clamping block (1701) located on the plug-in connector (17); when the plug-in connector (17) is plugged into the junction box (2), the clamping block (1701) extends into the snap-fit opening (204) to fix the plug-in connector (17) to the junction box (2).

3. The stepping motor wiring structure according to claim 2, characterized in that: The snap-fit connection portion further comprises a second snap-fit connection portion (19), which is located at the insertion port of the junction box (2); when the plug-in head (17) is plugged into the junction box (2), the tail of the plug-in head (17) abuts against the second snap-fit connection portion (19), thereby limiting the position of the plug-in head (17).

4. The stepper motor wiring structure according to claim 1, characterized in that: The junction box (2) comprises a lower box body (202) and an upper box body (203) located above the lower box body (202), wherein the lower box body (202) and the upper box body (203) enclose a junction cavity, wherein the female socket (201) and the second connection end (502) are both located in the junction cavity, and the plug head (17) is plugged into the junction cavity and electrically connected to the second connection end (502).

5. The stepping motor wiring structure according to claim 4, characterized in that: The head of the plug head (17) is provided with an introduction chamfer (1702) and a guiding chamfer (1703), wherein the introduction chamfer (1702) is provided along the insertion direction of the plug head (17) and is used to guide the plug head (17) into the wiring cavity; and the guiding chamfer (1703) is provided at an angle to the insertion direction of the plug head (17) and is used to guide the position of the plug head (17) in the wiring cavity.

6. The stepper motor wiring structure according to claim 1, characterized in that: The female socket (201) is provided with a plurality of card slots; there are at least two PIN terminals (5), and the number of the card slots is not less than the number of the PIN terminals (5); A PIN terminal (5) is correspondingly connected in each of the card slots.

7. A stepping motor structure, characterized in that: It comprises a housing (1), a rotor assembly, a stator assembly (9), a power output assembly, and the stepping motor wiring structure according to claim 1, wherein the rotor assembly and the stator assembly (9) are both located in the housing (1); The stator assembly (9) is a hollow structure, the rotor assembly is located in the hollow structure, the power output assembly is connected to the rotor assembly, and the power output assembly at least partially extends outside the casing (1); The wire package assembly (16) is wound on the stator assembly (9); the junction box (2) is fixed on the outside of the housing (1); the female socket (201) is fixed on the stator assembly (9) and extends into the junction box (2).

8. The stepper motor structure according to claim 7, wherein: The stator assembly (9) comprises an injection molded part and a center plate (10), wherein the center plate (10) is integrally injection molded inside the injection molded part, the injection molded part and the center plate (10) are both hollow structures, and the rotor assembly is at least partially located in the hollow structure of the center plate (10).

9. The stepping motor structure according to claim 7, wherein: The rotor assembly comprises a casing axis (6) and a magnet assembly (8), wherein the casing axis (6) and the magnet assembly (8) are both located at least within the hollow structure of the center plate (10), and the casing axis (6) is mounted on the central axis of the magnet assembly (8); wherein one end of the casing axis (6) is riveted to the casing (1) through a pressure ring, and the other end of the casing axis (6) is connected to the power output assembly.

10. The stepping motor structure according to claim 9, characterized in that: The stepper motor structure further comprises a spring (7), wherein the spring (7) is connected to a connection portion between the housing axis (6) and the housing (1).

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