Stepping motor and electronic equipment

Abstract

The utility model relates to a stepping motor and an electronic device, the stepping motor comprises a casing, a rotation driving force assembly is arranged in the casing, the stepping motor also comprises a power output member connected with the rotation driving force assembly, at least part of the power output member is arranged in the casing, and the rotation driving force assembly is connected with the power output member. The rest part of the power output part protrudes out of the side wall of the machine shell in the radial direction of the machine shell. The motor structure has the advantages that the installation space can be effectively saved, the transmission function of the reduction gear box of the motor can be perfectly improved, and the original output shaft transmission at the position of the installation plate is ingeniously changed into direct transmission of the lateral gear of the machine shell.

Description

Technical Field

[0001] The utility model belongs to the field of mechanical driving, and in particular relates to a stepping motor and electronic equipment. Background Art

[0002] Patent CN201673351U discloses an automatic zoom module for a security lens, comprising a drive motor and a gearbox speed change assembly. The drive motor is a DC motor, and the gears in the gearbox speed change assembly are all spur gears. The gearbox speed change assembly comprises a motor gear fixed to the output shaft of the DC motor. The motor gear is sequentially meshed with an arc-shaped rack in the security lens through four reduction coaxial gears, and the arc-shaped rack drive is fixed to the telescopic lens. The motor gear and the reduction coaxial gears are installed in the gearbox housing, and the DC motor is directly fixed to the housing. Compared with the prior art, the present invention eliminates the worm gear transmission structure and directly replaces the existing high-precision stepper motor with an ordinary DC motor. This has low cost and simple control circuits. At the same time, the use of a high-precision transmission spur gear set makes the transmission more precise, stable and reliable, and the starting torque is also greater, and the volume can also be smaller, which can meet the low-cost, high-demand market demand.

[0003] In the above patents and prior art, the motor and transmission gear are designed to be separate, wherein the motor only serves as a power output unit, and is then transmitted by external gears. This design will occupy a large installation space on small equipment, which is not conducive to space utilization. Utility Model Content

[0004] The purpose of this utility model is to provide a stepping motor and electronic equipment that can solve the above technical problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A stepper motor includes a housing, a rotational driving force component is provided in the housing, and the stepper motor also includes a power output member connected to the rotational driving force component, at least a portion of the power output member is located in the housing, and at least a remaining portion of the power output member protrudes outside the side wall of the housing perpendicular to the radial direction of the housing.

[0007] Furthermore, the casing is provided with gear avoidance spaces distributed in the radial direction of the casing, the power output member extends into the gear avoidance spaces and the remaining portion of the power output member protrudes outside the gear avoidance spaces.

[0008] Furthermore, the gear avoidance space is any one of a gear avoidance through hole and a gear avoidance groove.

[0009] Furthermore, a section of the casing is open, the opening of the casing is connected to a cover plate, and a plurality of positioning ears perpendicular to the axis of the casing are folded and formed on the casing opening or the cover plate.

[0010] Furthermore, a groove is provided at the opening of the housing, the positioning ear is folded and formed at the bottom of the groove, and a folding block inserted into the groove is provided at the outer edge of the cover.

[0011] Furthermore, the rotational driving force assembly includes an outer stator group and an inner rotor group located in the outer stator group. The rotational driving force assembly also includes a gear transmission module located between the outer stator group and the cover plate. The gear transmission module is meshed with the power output member, and the gear transmission module is connected to the inner rotor group through a gear transmission structure.

[0012] Furthermore, the outer stator group includes at least one pawl gear plate, the power output member is located between the pawl gear plate and the cover plate and rotates relative to the pawl gear plate and the cover plate, and the gear transmission module is located between the pawl gear plate and the cover plate and rotates relative to the pawl gear plate and the cover plate.

[0013] Furthermore, a central shaft is provided between the bottom of the casing and the cover plate, the inner rotor group is sleeved on the central shaft, and the gear transmission structure includes a transmission gear connected to the inner rotor group, and the transmission gear is meshed with the gear transmission module.

[0014] Furthermore, a circuit board fixing part is provided on the side wall of the housing, and a circuit board electrically connected to the outer stator assembly is provided inside the circuit board fixing part.

[0015] The present application also provides an electronic device, which includes the stepping motor.

[0016] Compared with the existing technology, the advantages of this application are: the motor structure can effectively save installation space, and can fully realize the transmission function of the motor's reduction gearbox, cleverly changing the original installation plate position shaft transmission to direct transmission of the casing side gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a finished assembly diagram of the main structure of the stepping motor of the present utility model;

[0018] Figure 2 This is a detailed diagram of the internal transmission structure of the stepping motor of the present utility model;

[0019] Figure 3 This is a top view of the internal transmission structure details of the stepping motor of the present invention;

[0020] Figure 4 for Figure 3 Sectional structure diagram along line AA;

[0021] Figure 5 This is a front view of the structure details of the stepping motor without a housing of the present invention;

[0022] Figure 6 This is a front view of the structural details of the stepping motor without a housing of the present invention.

[0023] In the figure, the casing 1, the gear avoidance space 10, the cover 11, the positioning ear 12, the groove 13, the folding block 14, the casing bottom 15, the central axis 16, the rotary driving force component 2, the outer stator group 20, the ratchet gear plate 200, the connecting part 201, the inner rotor group 21, the transmission gear 210, the gear transmission module 22, the first double gear 220, the second double gear 221, the third double gear 222, the power output part 3, the circuit board fixing part 4, and the circuit board 40. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] Example 1

[0026] like Figure 2-Figure 3 As shown, the stepper motor of this embodiment includes a housing 1, a rotational driving force assembly 2, and a power output member 3. The power output member 3 is connected to the rotational driving force assembly 2 through meshing teeth. When the rotational driving force assembly 2 is energized, it generates a rotational driving force, which in turn drives the power output member 3 to rotate. In this embodiment, the power output member 3 is a gear. In other embodiments, it can also be an output shaft or other transmission member.

[0027] The rotary driving force component 2 is arranged inside the casing 1, and the axis of the power output member 3 is eccentric to the axis of the casing 1. In the preferred embodiment, the power output member 3 of this embodiment is at least partially located inside the casing 1, and the remaining part of the power output member 3 protrudes from the side wall of the casing 1 in the radial direction of the casing 1. The design of the power output member 3 changes the output position of the stepper motor in the prior art from the mounting plate of the motor to a lateral direct output transmission, which greatly optimizes the thickness of the stepper motor in the longitudinal direction (which can also be understood as the axis direction of the casing 1). Through the lateral output transmission, the longitudinal thickness of the stepper motor is greatly reduced, making the entire motor smaller. From the perspective of the application terminal space, the space occupied is significantly reduced, allowing designers to more flexibly place motors and other components in the equipment layout. This miniaturized design is particularly important in application scenarios where space is limited, such as projectors, robots, automation equipment, and precision instruments.

[0028] Specifically, the housing 1 is a cylindrical metal shell with an open end in the axial direction. Gear clearance spaces 10 are provided on the housing 1 in the radial direction of the housing 1. The gear clearance spaces 10 are either gear clearance through-holes or gear clearance grooves. The power output member 3 extends into the gear clearance spaces 10, with the remaining portion of the power output member 3 protruding from the outside of the gear clearance spaces 10. The power output member 3 protruding from the outside of the gear clearance spaces 10 is used to engage with an external controlled device. The power output member 3 within the housing 1 is engaged with the rotational driving force assembly 2. The external controlled device, for example, is a meshing gear (not shown in the figure) that transmits power.

[0029] In this embodiment, the gear avoidance space 10 is a gear avoidance groove, which is formed by cutting at one open end of the casing 1 when processing the casing 1. The processing height of the gear avoidance through hole must be greater than the thickness of the power output component 3.

[0030] At the same time, if Figure 1 As shown, the opening of the housing 1 is connected with a cover plate 11, and the cover plate 11 and the gear avoidance groove form a gear avoidance space 10. In another embodiment, the gear avoidance space 10 is directly selected as a gear avoidance through hole.

[0031] During the processing, the opening of the casing 1 is folded to form a number of positioning ears 12 that are perpendicular to the axis of the casing 1. There are at least two positioning ears 12, which are symmetrically distributed with respect to the axis of the casing 1. The positioning ears 12 are used to fix the stepper motor on the equipment in use. A positioning hole is provided on each positioning ear 12, and the positioning hole is a round hole, a square hole, etc.

[0032] Furthermore, a groove 13 is provided at the opening of the casing 1, and a positioning ear 12 is folded and formed at the bottom of the groove 13. A folding block 14 inserted into the groove 13 is provided at the outer edge of the cover 11. The design of the folding block 14 inserted into the groove 13 makes the installation of the cover 11 more convenient, and at the same time, the cover 11 can be restricted in the circumferential direction to prevent the cover 11 from rotating circumferentially relative to the casing 1. This structure not only simplifies the assembly process, but also reduces the need for tools, thereby reducing production and maintenance costs.

[0033] In another embodiment, a plurality of positioning ears 12 perpendicular to the axis of the housing 1 may be formed by folding on the cover plate 11 .

[0034] Specifically, if Figure 4As shown, the rotary drive assembly 2 includes an outer stator assembly 20 and an inner rotor assembly 21 located within the outer stator assembly. Furthermore, the rotary drive assembly 2 includes a gear transmission module 22 located between the outer stator assembly 20 and the cover plate 11. This gear transmission module 22 is tightly coupled to the power output member 3 through a precise meshing connection. Furthermore, the effective gear transmission structure connects the gear transmission module 22 to the inner rotor assembly 21, enhancing the reliability of power transmission.

[0035] The above design brings many advantages to the power output member 3: by utilizing the transmission mode between the gear transmission module 22 and the power output member 3, more efficient power output can be achieved, energy loss can be reduced, and the operating efficiency of the entire equipment can be improved.

[0036] The compact arrangement of the outer stator assembly 20 and the gear transmission module 22 makes the entire system more miniaturized and can effectively adapt to application scenarios with limited space.

[0037] The gear transmission structure between the inner rotor assembly 21 can flexibly respond to various load changes, ensuring smooth operation under different working environments and having good adaptability.

[0038] The optimized coordination of various system components can improve the stability of the equipment under high load and harsh environment, effectively reduce the failure rate and extend the service life of the equipment.

[0039] Furthermore, the outer stator assembly 20 includes at least one pawl gear plate 200. The pawl gear plate 200 not only provides isolation but also serves as a fixing platform for the various gears. The power output member 3 is positioned between the pawl gear plate 200 and the cover plate 11, rotating relative to the pawl gear plate 200 and the cover plate 11. The power output member 3 is fixed to a positioning shaft on the pawl gear plate 200, and the gear transmission module 22 is positioned between the pawl gear plate 200 and the cover plate 11, rotating relative to the pawl gear plate 200 and the cover plate 11. The outer edge of the pawl gear plate 200 has multiple connecting portions 201 that connect to the cover plate 11. The connecting portions 201 and the cover plate 11 utilize a concave-convex plug-in structure, for example, a protrusion and a positioning hole / slot, which provides a more stable fixation of the cover plate 11. Furthermore, the end of the outer stator assembly 20 away from the pawl gear plate 200 is fixed to the bottom of the housing 1. This structure also provides more stable axial fixation of the outer stator assembly 20.

[0040] The gear transmission module 22 includes several duplex gears, and is defined as a first duplex gear 220, a second duplex gear 221 and a third duplex gear 222 that are meshed in sequence. One of the gears of the first duplex gear 220 is meshed with the transmission gear 210, another gear of the first duplex gear 220 is meshed with one of the gears of the second duplex gear 221, another gear of the second duplex gear 221 is meshed with one of the gears of the third duplex gear 222, and another gear of the third duplex gear 222 is meshed with the power output member 3.

[0041] The gear transmission module 22 plays a role in power transmission and also plays a role in speed reduction, ensuring stable power transmission.

[0042] A gear fixing shaft is provided at the axial center of each double gear. One end of the gear fixing shaft is connected to the pawl gear plate 200 , and the other end of the gear fixing shaft is connected to the cover plate 11 .

[0043] There are two ways. The first way is that the gear fixing shaft and the double gear are circumferentially fixed. In this case, the gear fixing shaft rotates relative to the cover plate 11 and the ratchet gear plate 200.

[0044] The second type is that the double gears rotate relative to the gear fixing shaft, that is, the gear fixing shaft is fixedly connected to the cover plate 11 and the pawl gear plate 200 respectively.

[0045] The above two configurations can both meet the power transmission requirements of the first duplex gear 220 , the second duplex gear 221 and the third duplex gear 222 .

[0046] A central shaft 16 is provided between the shell bottom 15 and the cover plate 11, and the inner rotor group 21 is movably sleeved on the central shaft 16. The gear transmission structure includes a transmission gear 210 connected to the inner rotor group 21, and the transmission gear 210 is meshed with the gear transmission module 22. The transmission gear 210 is movably sleeved on the central shaft 16, and it directly outputs the power of the inner rotor group 21 to the gear transmission module 22, and then the gear transmission module 22 transmits it to the power output member 3.

[0047] In another embodiment, the central shaft 16 can rotate relative to the shell bottom 15 and the cover plate 11, and the inner rotor assembly 21 and the transmission gear 210 are fixed to the central shaft 16, which can also meet the power transmission requirements.

[0048] In addition, Figure 5-Figure 6As shown, a circuit board fixing part 4 is provided on the side wall of the casing 1. The structural design of fixing the circuit board fixing part 4 to the side wall of the casing can effectively save space, which helps to improve the overall design aesthetics and functionality of the equipment. A circuit board 40 electrically connected to the external stator group 20 is provided inside the circuit board fixing part 4, and the circuit board 40 is designed to be enclosed inside the casing through the circuit board fixing part 4, which can effectively prevent the influence of external environment such as dust and moisture, and improve the service life of the stepper motor.

[0049] The circuit board 40 is connected to a wire extending from the circuit board fixing member 4. The wire is a flexible wire to facilitate subsequent power supply connection.

[0050] Example 2

[0051] The structure and principle of this embodiment are basically the same as those of the first embodiment. The difference lies in that, compared with the stepping motor of the first embodiment, the electronic device of this embodiment includes a stepping motor.

[0052] Driven by precise electrical control signals, stepper motors rotate at fixed step angles, enabling precise displacement control. They are able to precisely control the angle and position of optical components such as lenses, apertures, and polarizers.

[0053] Typically equipped with a microcontroller or computer control system, it can control the movement of the stepper motor based on input data to adjust the position or orientation of the optical component. With appropriate software, automated calibration and data acquisition can also be achieved.

[0054] Electronic devices typically integrate lenses, optical sensors, or other optical components, and precisely control the optical path through the regulation of stepper motors. These electronic devices can be projectors, which amplify images or video signals and project them onto a screen or wall. These devices are widely used in business meetings, education, home theaters, and various public performances. In other embodiments, the electronic device can also be other devices with optical lenses or other devices that require a driven rotation.

[0055] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A stepper motor comprising a housing (1), wherein a rotation driving force component (2) is provided in the housing (1), characterized in that: The stepper motor further comprises a power output member (3) connected to the rotational driving force assembly (2), at least a portion of the power output member (3) being located within the housing (1), and at least a remaining portion of the power output member (3) being protruding from a side wall of the housing (1) perpendicular to a radial direction of the housing (1).

2. The stepper motor according to claim 1, characterized in that Gear avoidance spaces (10) are provided on the housing (1) and are distributed in the radial direction of the housing (1). The power output member (3) extends into the gear avoidance spaces (10) and the remaining portion of the power output member (3) protrudes outside the gear avoidance spaces (10).

3. The stepper motor according to claim 2, characterized in that: The gear avoidance space (10) is any one of a gear avoidance through hole and a gear avoidance groove.

4. The stepper motor according to claim 1, wherein: One end of the housing (1) is open, and the opening of the housing (1) is connected to a cover plate (11). The opening of the housing (1) or the cover plate (11) is folded to form a plurality of positioning ears (12) that are distributed perpendicularly to the axis of the housing (1).

5. The stepping motor according to claim 4, characterized in that: A groove (13) is provided at the opening of the housing (1), the positioning ear (12) is folded and formed at the bottom of the groove (13), and a folding block (14) inserted into the groove (13) is provided at the outer edge of the cover plate (11).

6. The stepping motor according to claim 4, characterized in that: The rotary driving force assembly (2) comprises an outer stator assembly (20) and an inner rotor assembly (21) located in the outer stator assembly (20). The rotary driving force assembly (2) further comprises a gear transmission module (22) located between the outer stator assembly (20) and the cover plate (11). The gear transmission module (22) is meshedly connected to the power output member (3). The gear transmission module (22) and the inner rotor assembly (21) are connected via a gear transmission structure.

7. The stepping motor according to claim 6, characterized in that: The outer stator assembly (20) includes at least one ratchet gear plate (200), the power output member (3) is located between the ratchet gear plate (200) and the cover plate (11) and rotates relative to the ratchet gear plate (200) and the cover plate (11), and the gear transmission module (22) is located between the ratchet gear plate (200) and the cover plate (11) and rotates relative to the ratchet gear plate (200) and the cover plate (11).

8. The stepper motor according to claim 6, characterized in that: A central shaft (16) is provided between the bottom (15) of the housing (1) and the cover plate (11); the inner rotor assembly (21) is sleeved on the central shaft (16); the gear transmission structure comprises a transmission gear (210) connected to the inner rotor assembly (21); and the transmission gear (210) is meshedly connected to the gear transmission module (22).

9. The stepper motor according to claim 6, characterized in that: A circuit board fixing part (4) is provided on the side wall of the housing (1), and a circuit board (40) electrically connected to the outer stator assembly (20) is provided inside the circuit board fixing part (4).

10. An electronic device, characterized in that The electronic device comprises the stepping motor according to any one of claims 1 to 9.

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