Speed reduction stepping motor

Abstract

The embodiment of the utility model provides a speed reduction stepping motor. The speed reduction stepping motor comprises a stepping motor and a speed reducer, the speed reducer is arranged at the top of the stepping motor; the stepping motor comprises a front shell assembly, a rear shell assembly and an iron core assembly. The front shell assembly is connected with the rear shell assembly through the iron core assembly; the rotating shaft is arranged in the middle of the iron core assembly and penetrates through the front shell assembly and the rear shell assembly. The problems that the torque of a stepping motor in the prior art is low, control cannot be accurately achieved, and most of the stepping motors do not have the speed reduction function are solved through the speed reducer, and the mode that the stepping motor is combined with the speed reducer enables the stepping motor to have the advantages of being high in reliability, high in precision, high in cost performance, long in service life, good in control performance and the like. On the basis of the advantages, the torque of the motor at a low speed is increased, and meanwhile, the performance advantages of the stepping motor are kept.

Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to a deceleration stepping motor. Background Art

[0002] A stepper motor is an electromechanical component that converts electrical pulse signals into angular or linear displacement. The rotation angle and speed of the stepper motor are proportional to the input pulse signal parameters. By controlling the frequency and number of pulses, the stepper motor can be continuously controlled to achieve precise positioning, smooth speed change and continuous operation.

[0003] However, the stepper motors currently on the market have low torque, cannot achieve precise control, and most of them do not have a deceleration function. Utility Model Content

[0004] In view of the above problems, an embodiment of the utility model is proposed to provide a deceleration stepping motor that overcomes the above problems or at least partially solves the above problems:

[0005] A deceleration stepper motor comprises a stepper motor and a reducer; the reducer is arranged on the top of the stepper motor;

[0006] The stepper motor comprises a front shell assembly, a rear shell assembly and an iron core assembly; the front shell assembly is connected to the rear shell assembly through the iron core assembly; the rotating shaft is provided in the middle of the iron core assembly, and the rotating shaft passes through the front shell assembly and the rear shell assembly.

[0007] Preferably, the front housing assembly includes a front end cover and a front bearing;

[0008] The rotating shaft passes through the front bearing, the front end cover wraps the front bearing, and the lower side of the front end cover is connected to the iron core assembly.

[0009] Preferably, a front enameled wire and a front frame are provided at the position where the front end cover is connected to the core assembly;

[0010] The front frame is provided with a first groove for accommodating the front enameled wire, and the bottom of the front frame is connected to the core assembly.

[0011] Preferably, the rear housing assembly includes a rear end cover and a rear bearing;

[0012] The rotating shaft passes through the rear bearing, and the rear end cover wraps the rear bearing.

[0013] Preferably, a rear enameled wire and a rear frame are provided at the position where the rear end cover is connected to the core assembly;

[0014] The rear frame is provided with a second groove for accommodating the rear enameled wire, and the bottom of the rear frame is connected to the iron core assembly.

[0015] Preferably, the front skeleton and the rear skeleton are oriented in opposite directions, the first groove is arranged upward, and the second groove is arranged downward.

[0016] Preferably, a wave washer is provided at the bottom of the rear bearing, and the wave washer is connected to the bottom of the rotating shaft.

[0017] Preferably, a circuit board and an insulating gasket are also provided at the position of the second groove;

[0018] The circuit board is connected to the rear end cover through the insulating gasket.

[0019] Preferably, the core assembly comprises a stator core and a rotor core;

[0020] The rotor core wraps the rotating shaft, and the stator core wraps the rotor core.

[0021] Preferably, the rotor core comprises a first core, a second core and magnetic steel;

[0022] The magnetic steel is arranged between the first iron core and the second iron core, the front shell component is arranged on the top of the first iron core, and the rear shell component is arranged on the bottom of the second iron core.

[0023] The present application specifically includes the following advantages:

[0024] In the embodiments of the present application, relative to the prior art problem that "the stepper motors of the prior art have low torque, cannot be accurately controlled, and most do not have a deceleration function", the present application provides a solution of "combining a reducer with a stepper motor", specifically: comprising a stepper motor and a reducer; the reducer is arranged on the top of the stepper motor; the stepper motor comprises a front shell component, a rear shell component and an iron core component; the front shell component is connected to the rear shell component through the iron core component; the rotating shaft is arranged in the middle of the iron core component, and the rotating shaft passes through the front shell component and the rear shell component. The reducer solves the problem that "the stepper motors of the prior art have low torque, cannot be accurately controlled, and most do not have a deceleration function". The combination of the stepper motor and the reducer makes the stepper motor have the advantages of high reliability, high precision, high cost performance, long life, good control performance, etc. This application adds the motor torque at low speed to these advantages while maintaining the performance advantages of the stepper motor. Due to the addition of a reducer, the motor can output a torque far greater than the motor itself at low speed. At the same time, the motor and reducer are matched with precision machining technology to make the teeth between the motor and reducer more fully matched, thus making the output efficiency of the product higher. The reducer is also designed to reduce weight in terms of weight. While maintaining structural stability, the reducer is designed to reduce weight so that the overall weight is controlled within a preset range. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0026] Figure 1 It is a cross-sectional structural schematic diagram of a deceleration stepping motor of the utility model;

[0027] Figure 2 It is a structural schematic diagram of a deceleration stepping motor of the utility model;

[0028] Figure 3 It is a structural schematic diagram of an iron core assembly of a deceleration stepping motor of the utility model;

[0029] Figure 4 It is a structural schematic diagram of a rotor core of a deceleration stepping motor of the utility model;

[0030] 1. Reducer; 2. Front housing assembly; 21. Front bearing; 22. Front cover; 23. Front enameled wire; 24. Front frame; 3. Core assembly; 31. Stator core; 32. Rotor core; 33. Magnet; 34. Rotating shaft; 4. Rear housing assembly; 41. Circuit board; 42. Insulating gasket; 43. Rear bearing; 44. Wave washer; 45. Rear cover. DETAILED DESCRIPTION

[0031] In order to make the objects, features and advantages of the present application more obvious and understandable, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0032] The inventors have found through analysis of the prior art that the stepper motor is an open-loop control element that converts an electrical pulse signal into an angular displacement or a linear displacement. In the case of non-overload, the motor's speed and stop position depend only on the frequency and number of pulses of the pulse signal, and are not affected by load changes. When the stepper driver receives a pulse signal, it drives the stepper motor to rotate a fixed angle in the set direction, called the "step angle", and its rotation is performed step by step at a fixed angle. The angular displacement can be controlled by controlling the number of pulses, thereby achieving the purpose of accurate positioning; at the same time, the speed and acceleration of the motor's rotation can be controlled by controlling the pulse frequency, thereby achieving the purpose of speed regulation.

[0033] The reduction stepper motor of the present application is mainly used in low-speed and high-torque applications, such as packaging machines, massage chairs, transmission tracks, robots, etc. It utilizes the characteristics of the reducer to reduce the number of revolutions and amplify the output torque, allowing the motor to output a larger torque in low-speed applications.

[0034] A stepper motor is an electromechanical component that converts electrical pulse signals into angular or linear displacement. The rotation angle and speed of the stepper motor are proportional to the input pulse signal parameters. By controlling the frequency and number of pulses, the stepper motor can be continuously controlled to achieve precise positioning, smooth speed change and continuous operation.

[0035] The reducer 1 is a power transmission device, and usually adopts a planetary gear reducer 1 to reduce the rotation speed and increase the torque through the internal gear pair or worm gear pair.

[0036] The advantage of the reduction stepper motor of the present application is that it provides a large torque at a low speed. Relying on the accuracy and stability of the stepper motor itself and the precise reduction ratio of the reducer 1, it can be accurately positioned and achieve precise control in many occasions.

[0037] In the embodiments of the present application, relative to the prior art problem that "the stepper motors of the prior art have low torque, cannot be accurately controlled, and most do not have a deceleration function", the present application provides a solution of "combining a reducer 1 with a stepper motor", specifically: comprising a stepper motor and a reducer 1; the reducer 1 is arranged on the top of the stepper motor; the stepper motor comprises a front shell component 2, a rear shell component 4 and an iron core component 3; the front shell component 2 is connected to the rear shell component 4 through the iron core component 3; the middle of the iron core component 3 is provided with the rotating shaft 34, and the rotating shaft 34 passes through the front shell component 2 and the rear shell component 4. The reducer 1 solves the problem that "the stepper motors of the prior art have low torque, cannot be accurately controlled, and most do not have a deceleration function", and the combination of the stepper motor and the reducer 1 makes the stepper motor have the advantages of high reliability, high precision, high cost performance, long life, good control performance, etc. The present application adds the motor torque at low speed to these advantages, while maintaining the performance advantages of the stepper motor. Due to the addition of the reducer 1, the torque far greater than the motor itself can be output at low speed. At the same time, the motor and reducer 1 are matched with each other by using precision machining technology, so that the teeth between the motor and reducer 1 are more fully matched, thus making the output efficiency of the product higher. The reducer 1 also has a weight-reducing design in terms of weight. While maintaining the stability of the structure, the reducer 1 is designed to reduce weight so that the overall weight is controlled within a preset range.

[0038] It should be noted that the main difference between the open loop and closed loop of the stepper motor lies in the control method and the impact on the system accuracy. The open loop stepper motor is like sending a plain letter in the past. Send a signal to the motor, and the motor will perform actions in a preset order without feedback. This control method is simple and low cost, but the accuracy is relatively low. The deceleration stepper motor is equivalent to sending a registration letter, which requires the other party to execute the report and feedback. In closed-loop control, the stepper motor driver will feedback the corresponding action measures and signals to the PLC, and the PLC will decide the next program processing. This control method has high accuracy.

[0039] Reference Figure 1-4 , shows a schematic structural diagram of the deceleration stepper motor of the utility model, which may specifically include the following structure: including a stepper motor, a closed-loop driver and a wiring terminal; the top of the closed-loop driver is fixedly connected to the stepper motor, and the wiring terminal is provided on one side of the driver; wherein the cross-sectional shape of the driver is the same as the cross-sectional shape of the stepper motor; a rotating shaft 34 is provided inside the stepper motor, and the bottom of the rotating shaft 34 is connected to the closed-loop driver.

[0040] Next, a reduction stepping motor in this exemplary embodiment will be further described.

[0041] In one embodiment of the present application, the reducer 1 is arranged on the top of the stepper motor; the reducer 1 also has a weight-reducing design in terms of appearance and structure. While maintaining structural stability, the reducer 1 is designed to reduce weight so that the overall weight is controlled below 500g.

[0042] As an example, the cross-sectional area of ​​the reducer 1 is smaller than the cross-sectional area of ​​the stepper motor, thereby effectively reducing the volume and weight. The bottom of the reducer 1 is connected to the top of the rotating shaft 34. The stepper motor is equipped with the reducer 1 to reduce the number of revolutions and increase the output torque. The reducer 1 has a weight reduction groove added to its outer shape.

[0043] In one embodiment of the present application, the stepper motor includes a housing and a core assembly 3; the housing wraps the core assembly 3, and the middle of the core assembly 3 is provided with a rotating shaft 34. The rotating shaft 34 runs through the housing and the core assembly 3. The rotor core 32 includes a first core, a second core, and a magnetic steel 33; the magnetic steel 33 is provided between the first core and the second core, the front housing assembly 2 is provided at the top of the first core, and the rear housing assembly 4 is provided at the bottom of the second core.

[0044] As an example, the first core and the second core have the same shape.

[0045] In a specific embodiment, the front end cover 22 and the rear end cover 45 are respectively disposed on the upper side and the lower side of the core assembly 3 .

[0046] In one embodiment of the present application, the front housing assembly 2 includes a front cover 22 and a front bearing 21; the shaft 34 passes through the front bearing 21. The rear housing assembly 4 includes a rear cover 45 and a rear bearing 43; the shaft 34 passes through the rear bearing 43, and the rear cover 45 wraps the rear bearing 43.

[0047] In one embodiment of the present application, a front enameled wire 23 and a front frame 24 are provided at the position where the front end cover 22 is connected to the core assembly 3; the front frame 24 is provided with a first groove for accommodating the front enameled wire 23, and the bottom of the front frame 24 is connected to the core assembly 3.

[0048] As an example, a space for accommodating the front frame 24 is provided between the front end cover 22 and the stator core 31 . The front frame 24 is connected to the stator core 31 , and the front enameled wire 23 is provided inside the front frame 24 .

[0049] In one embodiment of the present application, the rear shell assembly 4 includes a rear end cover 45 and a rear bearing 43; the rotating shaft 34 passes through the rear bearing 43, and the rear end cover 45 wraps the rear bearing 43; the position where the rear end cover 45 is connected to the core assembly 3 is provided with a rear enameled wire and a rear frame; the rear frame is provided with a second groove for accommodating the rear enameled wire, and the bottom of the rear frame is connected to the core assembly 3.

[0050] In one embodiment of the present application, a wave washer 44 is provided at the bottom of the rear bearing 43, and the wave washer 44 is connected to the bottom of the rotating shaft 34. A circuit board 41 and an insulating gasket 42 are also provided at the position of the second groove; the circuit board 41 is connected to the rear end cover 45 through the insulating gasket 42.

[0051] As an example, a space for the rear frame is provided between the stator core 31 and the rear end cover 45 so as to accommodate the rear frame, the rear enameled wire is provided in the rear frame, the circuit board 41 is provided below the enameled wire, the insulating gasket 42 is provided at the bottom of the circuit board 41, and the insulating gasket 42 is connected to the rear end cover 45.

[0052] As an example, the front bearing 21 and the rear bearing 43 are both provided with balls inside. Bearing is an important component in contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. Rolling bearings generally consist of four parts: outer ring, inner ring, rolling element and cage. According to the shape of the rolling element, rolling bearings are divided into two categories: ball bearings and roller bearings.

[0053] In an embodiment of the present application, the core assembly 3 includes a rotor core 32 and a stator core 31 ; the rotating shaft 34 is connected to the rotor core 32 , and the stator core 31 wraps the rotor core 32 .

[0054] In one embodiment of the present application, the inner side of the stator core 31 is provided with inner teeth, and the outer side of the rotor core 32 is provided with outer teeth; the inner teeth are matched with the outer teeth, and the innermost circle of the inner teeth is flush with the outermost circle of the outer teeth.

[0055] In a specific embodiment, the reduction stepper motor is formed by combining a stepper motor and a reducer 1. The stepper motor has the advantages of high reliability, high precision, high cost performance, long life, and good control performance. This product adds the motor torque at low speed to these advantages, while maintaining the performance advantages of the stepper motor. Due to the addition of the reducer 1, it can output a torque far greater than the motor itself at low speed. At the same time, in the coordination between the motor and the reducer 1, a precision machining process is used to make the teeth between the motor and the reducer 1 more fully coordinated, so that the output efficiency of the product is higher. The reducer 1 also has a weight reduction design in terms of weight. While maintaining the stability of the structure, the reducer 1 is designed to reduce weight so that the overall weight is controlled within a preset range. The preset range is 300g to 600g, preferably 500g.

[0056] Although the preferred embodiments of the utility model embodiments have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the utility model embodiments.

[0057] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or terminal device including the elements.

[0058] The above is a detailed introduction to a deceleration stepper motor provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model; at the same time, for general technical personnel in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A deceleration stepping motor, characterized in that: It includes a stepper motor and a reducer; the reducer is arranged on the top of the stepper motor; The stepper motor comprises a front shell assembly, a rear shell assembly and an iron core assembly; the front shell assembly is connected to the rear shell assembly through the iron core assembly; a rotating shaft is provided in the middle of the iron core assembly, and the rotating shaft passes through the front shell assembly and the rear shell assembly.

2. The reduction stepping motor according to claim 1, characterized in that: The front housing assembly includes a front end cover and a front bearing; The rotating shaft passes through the front bearing, the front end cover wraps the front bearing, and the lower side of the front end cover is connected to the iron core assembly.

3. The reduction stepping motor according to claim 2, characterized in that: The position where the front end cover is connected to the core assembly is provided with a front enameled wire and a front frame; The front frame is provided with a first groove for accommodating the front enameled wire, and the bottom of the front frame is connected to the core assembly.

4. The reduction stepping motor according to claim 3, characterized in that: The rear housing assembly includes a rear end cover and a rear bearing; The rotating shaft passes through the rear bearing, and the rear end cover wraps the rear bearing.

5. The reduction stepping motor according to claim 4, characterized in that: The position where the rear end cover is connected to the core assembly is provided with a rear enameled wire and a rear frame; The rear frame is provided with a second groove for accommodating the rear enameled wire, and the bottom of the rear frame is connected to the iron core assembly.

6. The reduction stepping motor according to claim 5, characterized in that: The front skeleton and the rear skeleton are oriented in opposite directions, the first groove is arranged upward, and the second groove is arranged downward.

7. The reduction stepping motor according to claim 5, characterized in that: A wave washer is provided at the bottom of the rear bearing, and the wave washer is connected to the bottom of the rotating shaft.

8. The reduction stepping motor according to claim 5, characterized in that: A circuit board and an insulating gasket are also provided at the position of the second groove; The circuit board is connected to the rear end cover through the insulating gasket.

9. The reduction stepping motor according to claim 1, characterized in that: The core assembly includes a stator core and a rotor core; The rotor core wraps the rotating shaft, and the stator core wraps the rotor core.

10. The reduction stepping motor according to claim 9, characterized in that: The rotor core comprises a first core, a second core and magnetic steel; The magnetic steel is arranged between the first iron core and the second iron core, the front shell component is arranged on the top of the first iron core, and the rear shell component is arranged on the bottom of the second iron core.

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