CN114499099B - Stepping motor - Google Patents

Stepping motor Download PDF

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Publication number
CN114499099B
CN114499099B CN202210061711.4A CN202210061711A CN114499099B CN 114499099 B CN114499099 B CN 114499099B CN 202210061711 A CN202210061711 A CN 202210061711A CN 114499099 B CN114499099 B CN 114499099B
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China
Prior art keywords
cover
bearing
rotating shaft
inertia
cap
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CN202210061711.4A
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CN114499099A (en
Inventor
朱卫光
邢少鹏
文晓凤
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Beijing Dahao Industrial Sewing Intelligent Control Technology Co ltd
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Beijing Dahao Industrial Sewing Intelligent Control Technology Co ltd
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Priority to CN202210061711.4A priority Critical patent/CN114499099B/en
Publication of CN114499099A publication Critical patent/CN114499099A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K37/00—Motors with rotor rotating step by step and without interrupter or commutator driven by the rotor, e.g. stepping motors
    • H02K37/24—Structural association with auxiliary mechanical devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/02—Additional mass for increasing inertia, e.g. flywheels
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/04—Balancing means

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The embodiment of the disclosure relates to the technical field of stepping motors, in particular to a stepping motor which is used for solving the technical problem that the inertia of the stepping motor is matched with the load inertia. The stepping motor comprises a rotor, a stator, a rotating shaft, a first end cover, a second end cover and an inertia disc, wherein the rotor is fixedly arranged on the rotating shaft, and the stator is sleeved outside the rotor; the first end cover is covered at one end of the stator along the axis direction of the rotating shaft, the second end cover is covered at the other end of the stator along the axis direction of the rotating shaft, and the first end cover and the second end cover are connected with the stator; the first end cover is provided with a first bearing, the second end cover is provided with a second bearing, and the rotating shaft is matched with the first bearing and the second bearing; the output end of the rotating shaft penetrates out of the first end to be connected with a load; the inertia disc is fixed on the rotating shaft. Therefore, on the premise of ensuring transmission precision, the inertia of the stepping motor is matched with the load inertia.

Description

Stepping motor
Technical Field
The embodiment of the disclosure belongs to the technical field of motors, and particularly relates to a stepping motor.
Background
Stepper motors (e.g., stepper motors, three-term asynchronous stepper motors, etc.) have been commonly used in a variety of contexts as drives. In order to improve the working performance of a stepper motor, it is often necessary to match the inertia of the stepper motor with the inertia of a load so that there is a certain inertia ratio between the stepper motor and the load.
In the related art, in order to make the inertia of the stepper motor match with the load inertia, consideration is usually performed in a mechanical transmission link, and the inertia of the load end is adjusted by adding a gear reducer at the load end, so as to achieve the purpose of balancing the inertia of the stepper motor and the load inertia.
However, the introduction of the gear reducer easily causes a reduction in the transmission accuracy of the transmission system.
Disclosure of Invention
The embodiment of the disclosure provides a stepping motor, which is used for solving the technical problem that the inertia of the stepping motor is matched with the load inertia on the premise of ensuring the transmission precision in the related art.
The solution for solving the technical problems in the embodiment of the disclosure is as follows: a stepping motor comprises a rotor, a stator, a rotating shaft, a first end cover, a second end cover and an inertia disc,
The rotor is fixedly arranged on the rotating shaft, and the stator is sleeved outside the rotor;
The first end cover is covered at one end of the stator along the axis direction of the rotating shaft, the second end cover is covered at the other end of the stator along the axis direction of the rotating shaft, and the first end cover and the second end cover are connected with the stator; the first end cover is provided with a first bearing, the second end cover is provided with a second bearing, and the rotating shaft is matched with the first bearing and the second bearing; the output end of the rotating shaft penetrates out of the first end to be connected with a load;
the inertia disc is fixed on the rotating shaft.
The beneficial effects of the embodiment of the disclosure are that: through setting up this inertia dish can make step motor's inertia and load inertia cooperate, can effectually guarantee step motor's inertia and load inertia's proportion be in reasonable inertia ratio scope. Therefore, the inertia disc is arranged on the rotating shaft to be of a direct-drive stepping motor structure, gears and a speed reducing mechanism are not required to be added, so that the increase of transmission gaps is avoided, the transmission precision is further ensured, and meanwhile, the condition that the inertia of the stepping motor is matched with the load inertia is also met. The technical problem that the inertia of the stepping motor is matched with the load inertia on the premise of ensuring the transmission precision in the related art is solved.
In some embodiments, the stepper motor further comprises a first cover, the first cover is covered on one side of the second end cover, which is away from the first end cover, a first accommodating cavity is formed between the first cover and the second end cover, and a fixed end of the rotating shaft, which is opposite to the output end, is penetrated in the first accommodating cavity by the second end cover; the inertia disc is arranged in the first accommodating cavity and is fixedly connected with the fixed end.
In some embodiments, the stepper motor further comprises an encoder disposed within the first housing cavity and connected to the fixed end.
In some of these embodiments, the encoder is disposed on a side of the inertia disc facing the first end cap; or the encoder is arranged on one side of the inertia disc, which is away from the first end cover.
In some embodiments, the stepper motor further comprises a second cover cap, wherein the second cover cap is arranged on one side of the first end cap, which is away from the second end cap, a second accommodating cavity is arranged between the second cover cap and the first end cap, and the output end passes through the second accommodating cavity; the inertia disc is arranged in the second accommodating cavity and fixedly connected with the output end.
In some embodiments, the stepper motor further comprises a first cover cap and an encoder, wherein the first cover cap is arranged on one side of the second end cover, which is away from the first end cover, a first accommodating cavity is formed between the first cover cap and the second end cover, and a fixed end of the rotating shaft, which is opposite to the output end, is penetrated in the first accommodating cavity by the second end cover; the encoder is arranged in the first accommodating cavity and is connected with the fixed end.
In some of these embodiments, the first end cap has a first bearing aperture disposed therein, the first bearing being disposed within the first bearing aperture; the second end cover is provided with a second bearing hole, and the second bearing is arranged in the second bearing hole.
In some of these embodiments, the inertia disc is disposed within the first bearing aperture, the inertia disc being located on a side of the first bearing facing the second end cap.
In some of these embodiments, the inertia disc is disposed within the second bearing aperture, the inertia disc being located on a side of the second bearing that faces the first endcap.
In some embodiments, the stepper motor further comprises a first cover cap and an encoder, wherein the first cover cap is arranged on one side of the second end cover, which is away from the first end cover, a first accommodating cavity is formed between the first cover cap and the second end cover, and a fixed end of the rotating shaft, which is opposite to the output end, is penetrated in the first accommodating cavity by the second end cover; the encoder is arranged in the first accommodating cavity and is connected with the fixed end.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained from the structures shown in the drawings without inventive effort to those of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a stepper motor according to an embodiment of the present disclosure;
Fig. 2 is a schematic structural diagram of a stepper motor according to an embodiment of the present disclosure;
Fig. 3 is a schematic diagram of a stepper motor according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a stepper motor according to an embodiment of the present disclosure;
fig. 5 is a schematic diagram of a stepper motor according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a stepper motor according to an embodiment of the present disclosure;
Fig. 7 is a schematic structural diagram seven of a stepper motor according to an embodiment of the present disclosure;
fig. 8 is a schematic structural diagram eight of a stepper motor according to an embodiment of the present disclosure;
Fig. 9 is a schematic diagram nine of a structure of a stepper motor according to an embodiment of the present disclosure.
Reference numerals illustrate:
100. a stator; 200. a rotor; 300. a rotating shaft; 310. an output end; 320. a fixed end;
400. a first end cap; 410. a first bearing hole; 420. a first bearing;
500. a second end cap; 510. a second bearing hole; 520. a second bearing;
600. a first cover; 610. a first accommodation chamber;
700. A second cover; 710. a second accommodation chamber;
800. an inertia disc; 900. an encoder.
Detailed Description
Stepper motors (e.g., stepper motors, three-term asynchronous stepper motors, etc.) have been commonly used in a variety of contexts as drives. In order to improve the working performance of a stepper motor, it is often necessary to match the inertia of the stepper motor with the inertia of a load so that there is a certain inertia ratio between the stepper motor and the load.
In the related art, in order to make the inertia of the stepper motor match with the load inertia, consideration is usually performed in a mechanical transmission link, and the inertia of the load end is adjusted by adding a gear reducer at the load end, so as to achieve the purpose of balancing the inertia of the stepper motor and the load inertia.
However, in the related art, due to the introduction of the gear reducer, the transmission accuracy of the transmission system is easily lowered.
In view of this, the embodiment of the disclosure provides a stepper motor, which includes an inertia disc, and the inertia disc is disposed on the rotating shaft, and by setting the inertia disc, the inertia of the stepper motor and the load inertia can be matched, i.e. the ratio of the inertia of the stepper motor and the load inertia can be effectively ensured to be in a reasonable inertia ratio range. Therefore, the inertia disc is arranged on the rotating shaft to be of a direct-drive stepping motor structure, gears and a speed reducing mechanism are not required to be added, the transmission precision is improved, and meanwhile the condition that the inertia of the stepping motor is matched with the load inertia is met. The technical problem of low transmission precision in the related art is solved.
In order to make the above objects, features and advantages of the embodiments of the present application more comprehensible, the technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1 to 9, the stepping motor provided by the embodiments of the present disclosure includes a rotor 200, a stator 100, a rotating shaft 300, a first end cover 400, a second end cover 500, and an inertia disc 800, wherein the rotor 200 is fixedly disposed on the rotating shaft 300, and the stator 100 is sleeved outside the rotor 200; the first end cover 400 is covered at one end of the stator 100 along the axial direction of the rotating shaft 300, the second end cover 500 is covered at the other end of the stator 100 along the axial direction of the rotating shaft 300, and the first end cover 400 and the second end cover 500 are connected with the stator 100; the first end cap 400 is provided with a first bearing 420, the second end cap 500 is provided with a second bearing 520, and the rotating shaft 300 is matched with the first bearing 420 and the second bearing 520; the output end 310 of the rotating shaft 300 is penetrated out of the first end cap 400 to be connected with a load; inertia disc 800 is fixed to rotation shaft 300.
For example, the stator 100 may include a plurality of silicon steel sheets, and be laminated by the plurality of silicon steel sheets; the stator 100 may include six magnetic poles, each two opposite magnetic poles are wound with the same phase winding, the three-phase winding is assembled into a star shape as a control winding, and the windings of the stator 100 may be classified into two types of centralized type and distributed type according to the winding shape and the embedded wiring mode of the coil. The rotor 200 core may also include and be laminated by a plurality of silicon steel sheets. The rotor 200 has no windings on the core, only a plurality of teeth, and the tooth width is equal to the pole shoe width of the stator 100.
In this embodiment, the first end cover 400 is disposed on one side of the stator 100, and the second end cover 500 is disposed on the other side of the stator 100, that is, it can be understood that along the axis of the rotating shaft 300, the first end cover 400 and the second end cover 500 are respectively disposed at two ends of the stator 100. Meanwhile, there may be a gap between the first end cap 400 and the stator 100 where the first bearing 420 is provided, and a gap between the second end cap 500 and the stator 100 where the second bearing 520 is provided.
Illustratively, inertia disc 800 is disposed on rotating shaft 300, and it may be disposed outside of first end cap 400, i.e., on a side of first end cap 400 away from stator 100, or may be disposed within first end cap 400, on a side of first bearing 420 near rotor 200; the inertia disc 800 may be either disposed outside the second end cap 500, i.e., on a side of the second end cap 500 remote from the stator 100, or the inertia disc 800 may be disposed inside the second end cap 500, i.e., on a side of the second bearing 520 near the rotor 200.
Therefore, the inertia disc 800 is arranged on the rotating shaft 300 to be of a direct-drive stepping motor structure, gears and a speed reducing mechanism are not required to be added, so that the increase of transmission gaps is avoided, the transmission precision is further ensured, and meanwhile, the condition that the inertia of the stepping motor is matched with the load inertia is also met. The technical problem that the inertia of the stepping motor is matched with the load inertia on the premise of ensuring the transmission precision in the related art is solved.
With continued reference to fig. 1, the stepper motor includes a stator 100, a rotor 200, a rotational shaft 300, a first end cap 400, a second end cap 500, a first cover 600, and an inertia disc 800. The rotor 200 is fixedly arranged on the rotating shaft 300, and the stator 100 is sleeved outside the rotor 200; the first end cover 400 is covered at one end of the stator 100 along the axial direction of the rotating shaft 300, the second end cover 500 is covered at the other end of the stator 100 along the axial direction of the rotating shaft 300, and the first end cover 400 and the second end cover 500 are connected with the stator 100; the first end cap 400 is provided with a first bearing 420, the second end cap 500 is provided with a second bearing 520, and the rotating shaft 300 is matched with the first bearing 420 and the second bearing 520; the output end 310 of the rotating shaft 300 is penetrated out from the first end to be connected with a load; the first cover 600 is covered on one side of the second end cover 500 away from the first end cover 400, a first accommodating cavity 610 is provided between the first cover 600 and the second end cover 500, the fixed end 320 of the rotating shaft 300 opposite to the output end 310 is arranged in the first accommodating cavity 610 through the second end cover 500, and the inertia disc 800 is arranged in the first accommodating cavity 610 and fixedly connected with the fixed end 320. The output end 310 of the rotation shaft 300 is an end connected to a load, the fixed end 320 of the rotation shaft 300 is a free end of the rotation shaft 300, and the fixed end 320 is disposed opposite to the output end 310 along the axial direction of the rotation shaft 300.
Illustratively, the stator 100 is sleeved on the outer circumference of the rotor 200, and the stator 100 and the rotor 200 are positioned between the first end cover 400 and the second end cover 500. The first end cover 400 and the second end cover 500 are respectively provided with a cavity, the cavities on the first end cover 400 form the first bearing hole 410, the cavities on the second end cover 500 form the second bearing hole 510, and the cavities on the first cover 600 form the first accommodating cavity. The first bearing hole 410 is provided with a first bearing 420, and the second bearing hole 510 is provided with a second bearing 520, that is, the first bearing 420 and the second bearing 520 are respectively sleeved at two ends of the rotating shaft 300. In this embodiment, the inner wall of the first bearing hole 410 is connected with the outer wall of the first bearing 420, so that the first bearing hole 410 plays a certain limiting role on the first bearing 420, and the first bearing 420 can be stably arranged in the first bearing hole 410; meanwhile, the inner wall of the second bearing hole 510 is connected with the outer wall of the second rotating shaft 300, so that the second bearing hole 510 plays a certain limiting role on the second bearing 520, and the second bearing 520 can be stably arranged in the second accommodating cavity. Thus, by adopting the above structure, the stability of the rotation shaft 300 in the process of rotation is further ensured.
A cavity may be disposed in the first cover 600, and the cavity is the first accommodating cavity 610. Meanwhile, the upper end surface of the first cover 600 is flush with the upper end surface of the second end cover 500, and the lower end surface of the first cover 600 is flush with the lower end surface of the second end cover 500, so that the overall structure of the stepping motor can be more compact.
The inertia disc 800 is disposed in the first accommodating cavity, that is, the inertia disc 800 is disposed at a side of the output end 310 far away from the rotation shaft 300, and the inertia disc 800 is fixedly disposed on the rotation shaft 300. It may also be understood that the inertia disc 800 is disposed outside the second end cap 500 and inside the first cover 600, and meanwhile, the end of the rotation shaft 300 is located in the first cover 600, that is, the first cover 600 seals the end of the stepper motor, and the inertia disc 800 is disposed in the first cover 600, so that when the user needs to adjust the inertia ratio, the inertia disc 800 is detached and replaced, and the first cover 600 can protect the inertia disc 800.
Therefore, the rotor inertia of the stepping motor can be changed by arranging the inertia disc 800, namely, the size of the inertia disc 800 in the stepping motor can be changed according to actual needs, the condition of matching between the rotor inertia and load inertia can be met, the inertia is arranged inside the stepping motor, components are not required to be added outside, the problems that the assembly angles of gears and a speed reducing mechanism are required to be considered in the related art, and a plurality of steps of centering, straightening, leveling and the like are required in the installation process, the requirements on the machining precision of parts are high, the requirements on the assembly process are high, meanwhile, the introduction of a gear reducer increases the risk of a transmission gap, and the transmission precision is reduced are avoided.
With continued reference to fig. 2, the stepper motor may further include an encoder 900, where the encoder 900 is disposed in the first receiving cavity 610, i.e., the stepper motor includes the stator 100, the rotor 200, the rotation shaft 300, the first end cap 400, the second end cap 500, the first cover 600, the inertia disc 800, and the encoder 900. The rotor 200 is fixedly arranged on the rotating shaft 300, and the stator 100 is sleeved outside the rotor 200; the first end cover 400 is covered at one end of the stator 100 along the axial direction of the rotating shaft 300, the second end cover 500 is covered at the other end of the stator 100 along the axial direction of the rotating shaft 300, and the first end cover 400 and the second end cover 500 are connected with the stator 100; the first end cover 400 is provided with a first bearing 420, the second end cover 500 is provided with a second bearing 520, and both ends of the rotating shaft 300 are respectively provided with the first bearing 420 and the second bearing 520; the output end 310 of the rotating shaft 300 is penetrated out from the first end to be connected with a load; the first cover 600 is covered on one side of the second cover 500 away from the first cover 400, a first accommodating cavity 610 is provided between the first cover 600 and the second cover 500, the fixed end 320 of the rotating shaft 300 opposite to the output end 310 is arranged in the first accommodating cavity 610 through the second cover 500, the inertia disc 800 is arranged in the first accommodating cavity 610 and fixedly connected with the fixed end 320, and the encoder 900 is arranged in the first accommodating cavity and connected with the fixed end 320. Wherein the encoder 900 is disposed on a side of the inertia disc 800 facing the first end cap 400; alternatively, as shown in FIG. 3, encoder 900 is disposed on a side of inertia disc 800 facing away from first end cap 400. By providing this encoder 900, the position of the stepping motor, i.e., the number of turns of the stepping motor can be fed back.
With continued reference to fig. 4, the stepper motor includes a stator 100, a rotor 200, a rotating shaft 300, a first end cap 400, a second end cap 500, a second end cap 700, and an inertia disc 800. The rotor 200 is fixedly arranged on the rotating shaft 300, and the stator 100 is sleeved outside the rotor 200; the first end cover 400 is covered at one end of the stator 100 along the axial direction of the rotating shaft 300, the second end cover 500 is covered at the other end of the stator 100 along the axial direction of the rotating shaft 300, and the first end cover 400 and the second end cover 500 are connected with the stator 100; the first end cap 400 is provided with a first bearing 420, the second end cap 500 is provided with a second bearing 520, and the rotating shaft 300 is matched with the first bearing 420 and the second bearing 520; the output end 310 of the rotating shaft 300 is penetrated out from the first end to be connected with a load; the second cover 700 is covered on the side of the first end cover 400 away from the second end cover 500, a second accommodating cavity 710 is arranged between the second cover 700 and the first end cover 400, and the output end 310 passes through the second accommodating cavity 710; inertia disc 800 is disposed in second receiving chamber 710 and is fixedly coupled to output port 310.
Illustratively, the stator 100 is sleeved outside the rotor 200, and the stator 100 and the rotor 200 are positioned between the first end cover 400 and the second end cover 500. The first end cover 400, the second cover 700, and the second end cover 500 are respectively provided with a cavity, the cavities on the first end cover 400 form the first bearing hole 410, the cavities on the second end cover 500 form the second bearing hole 510, and the cavities on the second cover 700 form the second accommodating cavity. The first bearing hole 410 is provided with a first bearing 420, and the second bearing hole 510 is provided with a second bearing 520, that is, the first bearing 420 and the second bearing 520 are respectively sleeved at two ends of the rotating shaft 300. In this embodiment, the inner wall of the first bearing hole 410 is connected with the outer wall of the first bearing 420, so that the first bearing hole 410 plays a certain limiting role on the first bearing 420, and the first bearing 420 can be stably arranged in the first bearing hole 410, so that the rotation shaft 300 can be more stable in the rotation process; meanwhile, the inner wall of the second bearing hole 510 is connected with the outer wall of the second rotating shaft 300, so that the second bearing hole 510 plays a certain limiting role on the second bearing 520, and the second bearing 520 can be stably arranged in the second accommodating cavity, thereby further ensuring the stability of the rotating shaft 300 in the rotating process.
A cavity may be provided in the second cover 700, and the cavity is the second receiving cavity 710. Meanwhile, the upper end surface of the second cover 700 is flush with the upper end surface of the first cover 400, and the lower end surface of the second cover 700 is flush with the lower end surface of the first cover 400, so that the overall structure of the stepping motor can be more compact.
The inertia disc 800 is disposed in the second accommodating cavity 710, that is, the inertia disc 800 is disposed at a side near the output end 310 of the rotation shaft 300, and the inertia disc 800 is fixedly disposed on the rotation shaft 300. It may also be understood that the inertia disc 800 is disposed outside the first end cap 400 and inside the second cover 700, and the end of the rotating shaft 300 extends to the outside of the second cover 700, so as to be connected with a load, and the inertia disc 800 is disposed in the second cover 700, so that when the inertia ratio is adjusted by a user, the inertia disc 800 is detached and replaced, and the second cover 600 can protect the inertia disc 800. Meanwhile, when the inertia disc 800 is disposed at one end of the connection load inertia near the rotation shaft 300, the deflection of the rotation shaft 300 of the stepping motor can be reduced, which is advantageous for the stability of the rotation of the stepping motor.
In some embodiments, an encoder 900 may be further disposed in the second cover 700, where the encoder 900 may be disposed between the inertia disc 800 and the first end cap 400, and the encoder 900 may be disposed on a side of the inertia disc 800 away from the first end cap 400, i.e., where the inertia disc 800 is disposed between the second end cap 500 and the encoder 900. By providing this encoder 900, the position of the stepping motor, i.e., the number of turns of the stepping motor can be fed back. By providing this encoder 900, the position of the stepping motor, i.e., the number of turns of the stepping motor can be fed back.
With continued reference to fig. 5, the stepper motor includes a stator 100, a rotor 200, a rotational shaft 300, a first end cap 400, a second end cap 500, a first cover 600, a second cover 700, an inertia disc 800, and an encoder 900.
The rotor 200 is fixedly arranged on the rotating shaft 300, and the stator 100 is sleeved outside the rotor 200; the first end cover 400 is covered at one end of the stator 100 along the axial direction of the rotating shaft 300, the second end cover 500 is covered at the other end of the stator 100 along the axial direction of the rotating shaft 300, and the first end cover 400 and the second end cover 500 are connected with the stator 100; the first end cap 400 is provided with a first bearing 420, the second end cap 500 is provided with a second bearing 520, and the rotating shaft 300 is matched with the first bearing 420 and the second bearing 520; the output end 310 of the rotating shaft 300 is penetrated out from the first end to be connected with a load; the first cover 600 is covered on one side of the second end cover 500 away from the first end cover 400, a first accommodating cavity 610 is formed between the first cover 600 and the second end cover 500, and the fixed end 320 of the rotating shaft 300 opposite to the output end 310 is penetrated in the first accommodating cavity 610 by the second end cover 500; the encoder 900 is disposed in the first accommodating cavity 610 and connected to the fixed end 320. The second cover 700 is covered on the side of the first end cover 400 away from the second end cover 500, a second accommodating cavity 710 is arranged between the second cover 700 and the first end cover 400, and the output end 310 passes through the second accommodating cavity 710; inertia disc 800 is disposed in second receiving chamber 710 and is fixedly coupled to output port 310.
Illustratively, the stator 100 is sleeved on the outer circumference of the rotor 200, and the stator 100 and the rotor 200 are positioned between the first end cover 400 and the second end cover 500. The first end cover 400, the second cover 700, and the second end cover 500 are respectively provided with a cavity, the cavities on the first end cover 400 form the first bearing hole 410, the cavities on the second end cover 500 form the second bearing hole 510, and the cavities on the second cover 700 form the second accommodating cavity. The first bearing hole 410 is provided with a first bearing 420, and the second bearing hole 510 is provided with a second bearing 520, that is, the first bearing 420 and the second bearing 520 are respectively sleeved at two ends of the rotating shaft 300. In this embodiment, the inner wall of the first bearing hole 410 is connected with the outer wall of the first bearing 420, so that the first bearing hole 410 plays a certain limiting role on the first bearing 420, and the first bearing 420 can be stably arranged in the first bearing hole 410, so that the rotation shaft 300 can be more stable in the rotation process; meanwhile, the inner wall of the second bearing hole 510 is connected with the outer wall of the second rotating shaft 300, so that the second bearing hole 510 plays a certain limiting role on the second bearing 520, and the second bearing 520 can be stably arranged in the second accommodating cavity, thereby further ensuring the stability of the rotating shaft 300 in the rotating process.
A cavity may be disposed in the first cover 600, and the cavity is the first accommodating cavity 610. Meanwhile, the upper end surface of the first cover 600 is flush with the upper end surface of the second end cover 500, and the lower end surface of the first cover 600 is flush with the lower end surface of the second end cover 500, so that the overall structure of the stepping motor can be more compact. The second cover 700 has a cavity therein, which is the second receiving cavity 710. Meanwhile, the upper end surface of the second cover 700 is flush with the upper end surface of the first cover 400, and the lower end surface of the second cover 700 is flush with the lower end surface of the first cover 400, so that the overall structure of the stepping motor can be more compact.
The encoder 900 is disposed in the first accommodating cavity 610, the inertia disc 800 is disposed in the second accommodating cavity 710, and the inertia disc 800 and the encoder 900 are both fixedly disposed on the rotating shaft 300. That is, the inertia disc 800 is disposed outside the first cover 400 and inside the second cover 700, and the end of the end portion of the rotation shaft 300 is extended out of the second cover 700 for connection with a load, and the inertia disc 800 is disposed in the second cover 700, so that the inertia disc 800 can be easily removed and replaced when the user adjusts the inertia ratio, and the second cover 600 can also protect the inertia disc 800. Meanwhile, the encoder 900 is disposed outside the second end cap 500 and inside the first cover 600, and the end of the rotation shaft 300 is located inside the first cover 600, i.e., the first cover 600 seals the end of the stepping motor, while the first cover 600 protects the encoder 900.
In some embodiments, inertia disc 800 may be disposed within first housing cavity 610 and encoder 900 may be disposed within second housing cavity 710.
With continued reference to fig. 6, the stepper motor includes a rotor 200, a stator 100, a rotating shaft 300, a first end cover 400, a second end cover 500, and an inertia disc 800, wherein the rotor 200 is fixedly disposed on the rotating shaft 300, and the stator 100 is sleeved outside the rotor 200; the first end cap 400 is disposed at one end of the stator 100 along the axial direction of the rotation shaft 300, the second end cap 500 is disposed at the other end of the stator 100 along the axial direction of the rotation shaft 300, and both the first end cap 400 and the second end cap 500 are connected to the stator 100. The first end cap 400 is provided with a first bearing hole 410, and the first bearing 420 is disposed in the first bearing hole 410; the second endcap 500 is provided with a second bearing aperture 510 and a second bearing 520 is mounted within the second bearing aperture 510. Meanwhile, an inertia disc 800 is disposed in the first bearing hole 410, and the inertia disc 800 is located at a side of the first bearing 420 facing the second end cap 500.
Illustratively, the stator 100 is sleeved on the outer circumference of the rotor 200, and the stator 100 and the rotor 200 are positioned between the first end cover 400 and the second end cover 500. The first end cover 400, the second cover 700, and the second end cover 500 are respectively provided with a cavity, the cavities on the first end cover 400 form a first bearing hole 410, the cavities on the second end cover 500 form a second bearing hole 510, wherein the first bearing hole 410 is internally provided with a first bearing 420, and the second bearing hole 510 is internally provided with a second bearing 520, that is, the first bearing 420 and the second bearing 520 are respectively sleeved at two ends of the rotating shaft 300. In this embodiment, the inner wall of the first bearing hole 410 is connected with the outer wall of the first bearing 420, so that the first bearing hole 410 plays a certain limiting role on the first bearing 420, and the first bearing 420 can be stably arranged in the first bearing hole 410, so that the rotation shaft 300 can be more stable in the rotation process; meanwhile, the inner wall of the second bearing hole 510 is connected with the outer wall of the second rotating shaft 300, so that the second bearing hole 510 plays a certain limiting role on the second bearing 520, and the second bearing 520 can be stably arranged in the second accommodating cavity, thereby further ensuring the stability of the rotating shaft 300 in the rotating process.
The inertia disc 800 is disposed in the first bearing 420, and the inertia disc 800 is fixedly disposed on the rotating shaft 300, one end of the rotating shaft 300 passes through the first bearing hole 410, and the other end of the rotating shaft 300 passes through the second bearing hole 420. Through set up first end cover 400 and second end cover 500 respectively at stator 100 and rotor 200 both ends, and set up inertia dish 800 in the first bearing hole 410 in first end cover 400, and be located between first bearing 420 and rotor 200 for step motor's overall structure is compacter, and makes inertia dish 800 can be more stable rotate along with axis of rotation 300. In addition, rotor inertia can be adjusted more accurately, so that the inertia ratio between the rotor inertia and the load inertia is more accurate, and the transmission precision is further improved.
With continued reference to fig. 7, the stepper motor includes a rotor 200, a stator 100, a rotating shaft 300, a first end cover 400, a second end cover 500, and an inertia disc 800, wherein the rotor 200 is fixedly disposed on the rotating shaft 300, and the stator 100 is sleeved outside the rotor 200; the first end cap 400 is disposed at one end of the stator 100 along the axial direction of the rotation shaft 300, the second end cap 500 is disposed at the other end of the stator 100 along the axial direction of the rotation shaft 300, and both the first end cap 400 and the second end cap 500 are connected to the stator 100. The first end cap 400 is provided with a first bearing hole 410, and the first bearing 420 is disposed in the first bearing hole 410; the second endcap 500 is provided with a second bearing aperture 510 and a second bearing 520 is mounted within the second bearing aperture 510. Meanwhile, an inertia disc 800 is disposed in the first bearing hole 410, and the inertia disc 800 is located at a side of the first bearing 420 facing the second end cap 500. By arranging the first and second end caps 400 and 500 at both ends of the stator 100 and the rotor 200, respectively, and arranging the inertia disc 800 in the second bearing hole 510 in the second end cap 500 and between the second bearing 520 and the rotor 200, the overall structure of the stepper motor is more compact, and the inertia disc 800 can rotate more stably along with the rotation shaft 300. In addition, rotor inertia can be adjusted more accurately, so that the inertia ratio between the rotor inertia and the load inertia is more accurate, and the transmission precision is further improved.
With continued reference to fig. 8, the stepper motor includes a rotor 200, a stator 100, a rotation shaft 300, a first end cap 400, a second end cap 500, a first cover 600, an inertia disc 800, and an encoder 900, wherein the rotor 200 is fixedly disposed on the rotation shaft 300, and the stator 100 is sleeved outside the rotor 200; the first end cap 400 is disposed at one end of the stator 100 along the axial direction of the rotation shaft 300, the second end cap 500 is disposed at the other end of the stator 100 along the axial direction of the rotation shaft 300, and both the first end cap 400 and the second end cap 500 are connected to the stator 100. The first end cap 400 is provided with a first bearing hole 410, and the first bearing 420 is disposed in the first bearing hole 410; the second endcap 500 is provided with a second bearing aperture 510 and a second bearing 520 is mounted within the second bearing aperture 510. Meanwhile, an inertia disc 800 is disposed in the first bearing hole 410, and the inertia disc 800 is located at a side of the first bearing 420 facing the second end cap 500. The first cover 600 is covered on one side of the second end cover 500 away from the first end cover 400, a first accommodating cavity 610 is provided between the first cover 600 and the second end cover 500, and the fixed end 320 of the rotating shaft 300 opposite to the output end 310 is penetrated in the first accommodating cavity 610 by the second end cover 500; the encoder 900 is disposed in the first accommodating cavity 610 and connected to the fixed end 320.
With continued reference to fig. 9, the stepper motor includes a rotor 200, a stator 100, a rotation shaft 300, a first end cap 400, a second end cap 500, a second cover 600, an inertia disc 800, and an encoder 900, wherein the rotor 200 is fixedly disposed on the rotation shaft 300, and the stator 100 is sleeved outside the rotor 200; the first end cap 400 is disposed at one end of the stator 100 along the axial direction of the rotation shaft 300, the second end cap 500 is disposed at the other end of the stator 100 along the axial direction of the rotation shaft 300, and both the first end cap 400 and the second end cap 500 are connected to the stator 100. The first end cap 400 is provided with a first bearing hole 410, and the first bearing 420 is disposed in the first bearing hole 410; the second endcap 500 is provided with a second bearing aperture 510 and a second bearing 520 is mounted within the second bearing aperture 510. Meanwhile, an inertia disc 800 is disposed in the first bearing hole 410, and the inertia disc 800 is located at a side of the second bearing 520 toward the first end cap 400. The first cover 600 is covered on one side of the second end cover 500 away from the first end cover 400, a first accommodating cavity 610 is provided between the first cover 600 and the second end cover 500, and the fixed end 320 of the rotating shaft 300 opposite to the output end 310 is penetrated in the first accommodating cavity 610 by the second end cover 500; the encoder 900 is disposed in the first accommodating cavity 610 and connected to the fixed end 320.
In summary, it is understood that a variety of different configurations of stepper motors may be achieved by varying the position of inertia disc 800 or the positions of inertia disc 800 and encoder 900. Through setting up this inertia dish 800 can change step motor's rotor inertia, can be through the size of changing the inertia dish 800 in the step motor according to actual need, can make the inertia ratio between rotor inertia and the load inertia be in reasonable within range, and this inertia dish 800 sets up in step motor inside, this simple structure easy operation, the angle of needing to consider the assembly of gear and reduction gears among the related art, and need centering in the installation, many steps such as alignment, leveling, the requirement of spare part machining precision is high, to the assembly technology requirement height, the introduction of gear reducer has increased the risk of transmission clearance simultaneously, lead to the problem that transmission precision falls.
In describing embodiments of the present disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. are directional or positional relationships indicated based on the drawings, merely for convenience in describing the embodiments of the present disclosure and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the embodiments of the present disclosure.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", and "a third" may explicitly or implicitly include at least one such feature. In the description of the embodiments of the present disclosure, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly specified otherwise.
In the presently disclosed embodiments, the terms "mounted," "connected," "secured," and the like are to be construed broadly, as well as being either fixedly connected, detachably connected, or integrally formed, unless otherwise specifically indicated and defined; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art according to specific circumstances.
In the presently disclosed embodiments, unless expressly stated and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intermediary. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Although embodiments of the present disclosure have been shown and described above, it should be understood that the above embodiments are illustrative and not to be construed as limiting the embodiments of the present disclosure, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the embodiments of the present disclosure.

Claims (9)

1. A stepping motor is characterized by comprising a rotor, a stator, a rotating shaft, a first end cover, a second end cover and an inertia disc,
The rotor is fixedly arranged on the rotating shaft, and the stator is sleeved outside the rotor;
The first end cover is covered at one end of the stator along the axis direction of the rotating shaft, the second end cover is covered at the other end of the stator along the axis direction of the rotating shaft, and the first end cover and the second end cover are connected with the stator; the first end cover is provided with a first bearing, the second end cover is provided with a second bearing, and the rotating shaft is matched with the first bearing and the second bearing; the output end of the rotating shaft penetrates out of the first end to be connected with a load;
the inertia disc is fixed on the rotating shaft;
The stepping motor further comprises a first cover cap, the first cover cap is arranged on one side, away from the first end cap, of the second end cap, a first accommodating cavity is formed between the first cover cap and the second end cap, and a fixed end, opposite to the output end, of the rotating shaft is penetrated into the first accommodating cavity by the second end cap; the inertia disc is arranged in the first accommodating cavity and is fixedly connected with the fixed end.
2. The stepper motor of claim 1, further comprising an encoder disposed within the first housing cavity and coupled to the fixed end.
3. The stepper motor of claim 2, wherein the encoder is disposed on a side of the inertia disc facing the first end cap; or the encoder is arranged on one side of the inertia disc, which is away from the first end cover.
4. The stepper motor of claim 1, further comprising a second cover cap, the second cover cap being provided on a side of the first end cap facing away from the second end cap, a second receiving cavity being provided between the second cover cap and the first end cap, the output end passing through the second receiving cavity; the inertia disc is arranged in the second accommodating cavity and fixedly connected with the output end.
5. The stepper motor of claim 4 further comprising a first cover cap and an encoder, the first cover cap being provided on a side of the second end cap facing away from the first end cap, a first receiving cavity being provided between the first cover cap and the second end cap, a fixed end of the rotating shaft opposite to the output end being provided in the first receiving cavity by the second end cap; the encoder is arranged in the first accommodating cavity and is connected with the fixed end.
6. The stepper motor of claim 1, wherein the first end cap has a first bearing aperture disposed therein, the first bearing being disposed within the first bearing aperture; the second end cover is provided with a second bearing hole, and the second bearing is arranged in the second bearing hole.
7. The stepper motor of claim 6, wherein the inertia disc is disposed within the first bearing aperture, the inertia disc being located on a side of the first bearing facing the second end cap.
8. The stepper motor of claim 6, wherein the inertia disc is disposed within the second bearing aperture, the inertia disc being located on a side of the second bearing facing the first end cap.
9. The stepper motor of claim 7 or 8, further comprising a first cover cap and an encoder, wherein the first cover cap is arranged on one side of the second end cap, which is away from the first end cap, a first accommodating cavity is arranged between the first cover cap and the second end cap, and a fixed end of the rotating shaft opposite to the output end is penetrated in the first accommodating cavity by the second end cap; the encoder is arranged in the first accommodating cavity and is connected with the fixed end.
CN202210061711.4A 2022-01-19 2022-01-19 Stepping motor Active CN114499099B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2805190Y (en) * 2005-05-16 2006-08-09 襄樊特种电机有限公司 Automobile with mixed power contg electric motor, and driving connection and clutch device with said motor
CN101009445A (en) * 2006-01-25 2007-08-01 台达电子工业股份有限公司 High inertia servo motor
CN202759330U (en) * 2012-09-25 2013-02-27 南京埃斯顿自动控制技术有限公司 A servo motor rotor device equipped with an inertia disc
CN105490446A (en) * 2015-10-12 2016-04-13 杭州桢正机器人科技有限公司 Servo motor with inertia disk and installation method for servo motor
DE102018107649A1 (en) * 2017-12-06 2019-06-06 Zhejiang Linix Motor Co., Ltd. servomotor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2805190Y (en) * 2005-05-16 2006-08-09 襄樊特种电机有限公司 Automobile with mixed power contg electric motor, and driving connection and clutch device with said motor
CN101009445A (en) * 2006-01-25 2007-08-01 台达电子工业股份有限公司 High inertia servo motor
CN202759330U (en) * 2012-09-25 2013-02-27 南京埃斯顿自动控制技术有限公司 A servo motor rotor device equipped with an inertia disc
CN105490446A (en) * 2015-10-12 2016-04-13 杭州桢正机器人科技有限公司 Servo motor with inertia disk and installation method for servo motor
DE102018107649A1 (en) * 2017-12-06 2019-06-06 Zhejiang Linix Motor Co., Ltd. servomotor

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