Stepping motor shock pad

Abstract

The utility model discloses a stepping motor shock pad, which relates to the technical field of peristaltic pump noise reduction and comprises a front support plate, an elastic connector and a rear support plate. The front supporting plate is connected with the stepping motor through four threaded holes, the rear supporting plate is connected with the motor support through four through holes, the front supporting plate and the rear supporting plate are arranged in a staggered mode at 45 degrees, and screw interference is avoided. The elastic connecting body is arranged between the front supporting plate and the rear supporting plate and used for connecting the front supporting plate and the rear supporting plate and playing a role in elastic damping. The elastic connecting body is integrally connected with the front supporting plate and the rear supporting plate, and high connecting strength and stability are achieved. By optimizing the structural design and material selection, resonance vibration is effectively isolated, noise is reduced, and the vibration isolator is suitable for various devices and application scenes and has good universality and market prospects.

Description

Technical Field

[0001] This utility model belongs to the field of peristaltic pump noise reduction technology, specifically relating to a stepper motor vibration damping pad. Background Technology

[0002] Stepper motors, as widely used prime movers, are extensively applied in various applications requiring precise position or speed control due to their low cost, simple control, and mature technology. From industrial automated production lines to medical devices, from office equipment to home appliances, stepper motors are ubiquitous. Their working principle involves receiving pulse signals and converting them into angular or linear displacement, thereby achieving precise motion control. This type of motor eliminates the need for complex feedback systems, enabling open-loop control and significantly reducing system complexity and cost, thus securing its important position in numerous fields.

[0003] Despite its many advantages, stepper motors have a significant drawback during operation: resonance. The resonance zone of a stepper motor refers to the area within a specific frequency range where vibrations are intensified due to its internal structure and operating principle. When the motor's operating frequency approaches or enters this resonance zone, the internal mechanical structure generates strong vibrations. These vibrations are transmitted through the motor bracket to the entire drive unit, causing resonance throughout the system. Resonance not only leads to motor instability but also generates significant noise, severely impacting the normal operation and lifespan of the equipment. For example, in laboratory environments, peristaltic pumps are typically used for precise liquid delivery, and the resonance noise from stepper motors can interfere with the accuracy of experimental results and even damage the hearing of laboratory personnel. Furthermore, in some industrial applications requiring high precision, resonance can lead to increased machining errors, affecting product quality.

[0004] Therefore, it is necessary to propose a new stepper motor vibration damping pad to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a stepper motor vibration damping pad to effectively isolate the resonant vibration of the stepper motor, reduce noise, and improve the operational stability and service life of the equipment.

[0006] To achieve the above objectives, this utility model provides the following solution: a stepper motor shock absorber, comprising:

[0007] The front support plate is used to connect with the stepper motor, and it has four threaded holes evenly distributed around its circumference.

[0008] The rear support plate is used to connect with the motor bracket. It has four through holes evenly distributed around its circumference. The positions of the four through holes and the four threaded holes are staggered by 45°.

[0009] An elastic connector is provided between the front support plate and the rear support plate to connect the two and provide elastic shock absorption.

[0010] In some optional embodiments of this utility model, the elastic connector is made of rubber with a hardness range of Shore A 45-60 degrees.

[0011] In some optional embodiments of this utility model, the elastic connector is natural rubber or neoprene rubber.

[0012] In some optional embodiments of this utility model, the elastic connector is a stepped ring body, with one end face being a straight end face and the other end face being a stepped end face. The front support plate is connected to the straight end face of the elastic connector, and the rear support plate is connected to the stepped end face of the elastic connector.

[0013] In some optional embodiments of this utility model, the front support plate, the rear support plate, and the elastic connector are integrally connected, and the elastic connector is molded.

[0014] In some optional embodiments of this utility model, both the front support plate and the rear support plate are made of metal.

[0015] In some optional embodiments of this utility model, both the front support plate and the rear support plate are square plates, and the front support plate and the rear support plate are offset at a 45° angle; the threaded holes are located at the four corners of the front support plate, and the through holes are located at the four corners of the rear support plate.

[0016] The present invention discloses the following technical effects:

[0017] This invention significantly improves the vibration damping performance and connection strength of stepper motors by optimizing the structural design and material selection of the damping pad, reducing noise and vibration pollution, and enhancing the operational stability and service life of the equipment. Furthermore, its excellent versatility and adaptability enable its widespread application in various devices requiring precise position or speed control, demonstrating significant practical value and market potential. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is the front view of the stepper motor shock absorber pad of this utility model;

[0020] Figure 2 for Figure 1 Sectional view at point AA;

[0021] Figure 3 This is a schematic diagram of the installation of the stepper motor shock absorber pad of this utility model;

[0022] In the diagram, 1. Stepper motor; 2. Motor shock absorber; 21. Rear support plate; 211. Through hole one; 212. Through hole two; 213. Through hole three; 214. Through hole four; 22. Front support plate; 221. Threaded hole one; 222. Threaded hole two; 223. Threaded hole three; 224. Threaded hole four; 23. Elastic connector; 3. Motor bracket; 4. Pump head bracket; 5. First mounting screw; 6. Second mounting screw. Detailed Implementation

[0023] 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 embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] To address the resonance problem of stepper motors, a specialized vibration damping pad has emerged on the market. This pad absorbs and isolates vibration energy by adding elastic material between the motor and its support, thereby reducing the impact of resonance on the system. However, existing vibration damping pad designs have significant drawbacks. First, existing pads typically have only two mounting holes: one for the motor and one for the connection to the motor support. While this simplifies the structure to some extent, it sacrifices installation strength and stability. Due to the limited number of mounting holes, the connection between the pad and the motor and support is weak, making the pad prone to deformation under impact or drop. Deformation of the pad alters the motor's position, potentially causing the entire drive unit to fail. For example, in equipment requiring frequent movement or used in complex environments, existing pad designs cannot meet the stability and reliability requirements. Second, the damping effect of existing pads is limited. While they can reduce high-frequency noise to some extent, their isolation effect on low-frequency resonant vibrations is not ideal. This is mainly because the structure and material selection of existing pads cannot effectively match the resonance characteristics of stepper motors, failing to achieve sufficient absorption and conversion of resonant energy.

[0026] Given the limitations of existing vibration damping pads, there is an urgent market need for a new type of vibration damping pad that can effectively solve the resonance problem of stepper motors. This new vibration damping pad should possess the following characteristics: First, it should provide sufficient installation strength to ensure a firm and reliable connection between the motor and its support in various complex environments, preventing deformation or failure due to external impacts. Second, it should have better vibration damping performance, effectively isolating the resonant vibration of the stepper motor, reducing noise, and improving the operational stability and service life of the equipment. Furthermore, the new vibration damping pad should also have good adaptability and versatility, being compatible with different models and specifications of stepper motors to meet diverse market demands.

[0027] Reference Figures 1 to 3 As shown, this utility model provides a stepper motor shock absorber, including a front support plate 22, an elastic connector 23 and a rear support plate 21. All components are connected as one unit, and a shaft hole for accommodating the motor drive shaft is opened at the center. The front support plate 22 is used to connect with the stepper motor 1, and the rear support plate 21 is used to connect with the motor bracket 3. The entire motor shock absorber 2 is installed in the motor drive assembly of the peristaltic pump driver.

[0028] Specifically, the front support plate 22 is a square plate with four threaded holes at its four corners, namely threaded hole one 221, threaded hole two 222, threaded hole three 223 and threaded hole four 224. The four threaded holes are used for threaded connection with the stepper motor 1. Compared with the traditional stepper motor damping pad, the motor damping pad 2 in this embodiment has two more threaded holes, which greatly enhances the connection strength, so that the front support plate 22 will not easily deform under vibration conditions.

[0029] The rear support plate 21 is also a square plate, and it is offset from the front support plate 22 at a 45° angle. It has four through holes at its four corners: through hole one 211, through hole two 212, through hole three 213, and through hole four 214. The positions of the four through holes are offset from the positions of the four threaded holes by 45° to prevent interference when installing screws. The four through holes are used to mount the motor damping pad 2 onto the motor bracket 3.

[0030] It should be understood that in some other embodiments, the front support plate 22 and the rear support plate 21 may also be plates of other shapes, such as equilateral triangles, regular hexagons, etc.

[0031] An elastic connector 23 is disposed between the front support plate 22 and the rear support plate 21 to connect the two and provide elastic damping. Therefore, the elastic connector 23 can be made of natural rubber or neoprene rubber with a hardness range of Shore A 45-60. This material selection and hardness range effectively absorb and isolate the vibration energy of the stepper motor 1, especially vibrations in the resonance zone, thereby significantly reducing the impact of noise and vibration on the equipment.

[0032] The hardness range of the elastic connector 23 has a significant impact on the damping effect. Elastic materials with lower hardness (such as Shore A hardness less than 45 degrees) generally have better flexibility and elasticity, and can absorb more vibration energy. However, excessively low hardness may cause the material to deform excessively under high load or high-frequency vibration, or even lose its shape, thereby reducing the stability and reliability of the damping effect. Elastic materials with higher hardness (such as Shore A hardness greater than 60 degrees) have better resistance to deformation and load-bearing capacity, but their flexibility is poor, and their ability to absorb vibration energy is weak. In the low-frequency resonance region, high-hardness materials may not be able to effectively isolate vibration, resulting in poor damping performance. This embodiment, through experimental comparison, selects a moderate hardness range of Shore A 45-60 degrees. Materials within this hardness range can achieve a balance between flexibility and resistance to deformation. They can effectively absorb and isolate vibration energy while maintaining stable shape and performance under load, thus achieving a good damping effect.

[0033] Meanwhile, the hardness of the elastic connector 23 affects its dynamic stiffness, which in turn affects the resonance frequency of the damping pad. Materials with lower hardness generally have lower dynamic stiffness and lower resonance frequencies, making them more suitable for isolating low-frequency vibrations; while materials with higher hardness have higher resonance frequencies, making them more suitable for isolating high-frequency vibrations. By selecting a hardness range of Shore A 45-60 degrees, the resonance frequency of the motor damping pad 2 can be staggered with that of the stepper motor 1, thereby effectively avoiding the superposition of resonance phenomena and reducing vibration transmission.

[0034] It should be understood that in practical applications, the vibration characteristics of the stepper motor 1 (such as resonant frequency and vibration amplitude) and the working environment (such as load size and vibration frequency range) are important factors in selecting the hardness of the elastic connector. The Shore A hardness range of 45-60 degrees is an optimized choice that balances damping effect, stability, and service life.

[0035] In this embodiment, the front support plate 22 and the rear support plate 21 are both made of metal, and the elastic connector 23 is made of rubber. During molding, adhesive is first applied to the two metal plates, then they are placed into the mold, raw rubber is filled in, and finally they are heated and vulcanized before the mold is opened and formed.

[0036] In some embodiments, the elastic connector 23 is a stepped annular body, with one end face being a straight end face and the other end face being a stepped end face. The front support plate 22 is connected to the straight end face of the elastic connector 23, and the rear support plate 21 is connected to the stepped end face of the elastic connector 23, specifically as follows: Figure 2 As shown.

[0037] In order to enhance the connection strength of the motor vibration damping pad 2, the number of mounting holes (threaded holes on the front support plate 22 and through holes on the rear support plate 21) of the vibration damping pad is increased from 2 to 4. This significantly enhances the connection strength between the motor vibration damping pad 2, the stepper motor 1, and the motor bracket 3, making the motor more stable during operation and less prone to deformation or failure due to external impact or frequent vibration.

[0038] In order to improve the installation reliability and stability of the motor vibration damping pad 2, the front support plate 22 and the rear support plate 21 are staggered by 45° in this embodiment. This makes the four through holes and four threaded holes staggered by 45°, avoiding interference between the mounting screws and facilitating installation and disassembly.

[0039] Figure 3 An exploded view of the motor damping pad 2 of this embodiment being installed in the motor drive assembly of the peristaltic pump driver is shown. As shown, the motor damping pad 2 is disposed between the stepper motor 1 and the motor bracket 3 for vibration isolation. The first mounting screw 5 is used to connect the motor damping pad 2 and the pump head bracket 4, and the second mounting screw 6 is used to connect the stepper motor 1 and the motor damping pad 2.

[0040] Through the above structural optimization, the front support plate 22 and rear support plate 21 of the motor vibration damping pad 2 are less prone to deformation under stress, thus better fulfilling its vibration damping function. Compared with traditional vibration damping pads, the vibration damping effect of this embodiment is more significant, especially in terms of vibration isolation in the low-frequency resonance zone. Due to the improved connection strength and vibration damping performance of the vibration damping pad, the motor is more stable during operation, reducing the risk of equipment failure caused by resonance or external impact. This not only improves the operational reliability of the equipment but also extends its service life. Therefore, the vibration damping pad design of this embodiment allows it to better adapt to various complex working environments, such as laboratories and industrial sites, maintaining a stable vibration damping effect even under frequent movement or external interference. Furthermore, the vibration damping pad design of this embodiment can be adapted to various models and specifications of stepper motors, exhibiting good versatility. This design enables the vibration damping pad to be widely used in different equipment and application scenarios, meeting diverse market demands.

[0041] Any aspects of this utility model that are not detailed herein are conventional technical means known to those skilled in the art.

[0042] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0043] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A stepper motor shock absorber, characterized in that, include: The front support plate (22) is used to connect with the stepper motor (1), and four threaded holes are evenly distributed around its circumference. The rear support plate (21) is used to connect with the motor bracket (3). It has four through holes evenly distributed around its circumference. The positions of the four through holes and the four threaded holes are staggered by 45°. An elastic connector (23) is provided between the front support plate (22) and the rear support plate (21) to connect the two and play the role of elastic shock absorption.

2. The stepper motor shock absorber according to claim 1, characterized in that, The elastic connector (23) is made of rubber and has a hardness range of Shore A 45-60 degrees.

3. The stepper motor shock absorber according to claim 2, characterized in that, The elastic connector (23) is made of natural rubber or chloroprene rubber.

4. The stepper motor shock absorber according to claim 1, characterized in that, The elastic connector (23) is a stepped ring with one side end face being a straight end face and the other side end face being a stepped end face. The front support plate (22) is connected to the straight end face of the elastic connector (23), and the rear support plate (21) is connected to the stepped end face of the elastic connector (23).

5. The stepper motor shock absorber according to claim 1, characterized in that, The front support plate (22), the rear support plate (21) and the elastic connector (23) are integrally connected, and the elastic connector (23) is molded.

6. The stepper motor shock absorber according to claim 5, characterized in that, Both the front support plate (22) and the rear support plate (21) are made of metal.

7. The stepper motor shock absorber according to claim 1, characterized in that, Both the front support plate (22) and the rear support plate (21) are square plates, and the front support plate (22) and the rear support plate (21) are offset at a 45° angle; the threaded holes are located at the four corners of the front support plate (22), and the through holes are located at the four corners of the rear support plate (21).

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