Precise miniature stepping motor

Abstract

The utility model discloses a precise miniature stepping motor, which comprises a rotor assembly, a stator assembly, a driving roller, a first sealing ring and a second sealing ring, the rotor assembly comprises a first rotor, a second rotor and a rotating shaft, the first rotor is cylindrical, the second rotor is tubular, the outer diameter of the first rotor is the same as the inner diameter of the second rotor, and the rotating shaft is provided with a first sealing ring and a second sealing ring. The first rotor is arranged in the second rotor, the rotating shaft penetrates through the axis of the first rotor, the stator assembly comprises a first stator and a second stator, the first stator and the second stator are both in a circular tube shape, the inner diameter of the first stator is the same as the outer diameter of the second stator, and the inner diameter of the second stator is larger than the outer diameter of the second rotor. The second stator is arranged in the first stator, the driving roller is arranged between the second rotor and the second stator and connected with the outer wall of the second rotor and the inner wall of the second stator, and the first sealing ring and the second sealing ring are arranged at the two ends of the first stator respectively. As a result, it is possible to provide a very small scale of rotational torque.

Description

Technical Field

[0001] The utility model relates to the technical field of power electronics, in particular to a precision micro stepping motor. Background Art

[0002] Nowadays, in the field of industrial automation, for example, precision machining, power electronic device production, textile printing and medical equipment, precision stepper motors are needed for precise control and speed regulation, so the research on such motors is of practical significance. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the above-mentioned technology at least to a certain extent.

[0004] Therefore, one object of the present invention is to provide a precision micro-stepping motor capable of providing extremely small-scale rotational torque.

[0005] To achieve the above-mentioned purpose, the first embodiment of the utility model proposes a precision micro stepping motor, including: a rotor assembly, a stator assembly, a plurality of driving rollers, a first sealing ring and a second sealing ring, wherein:

[0006] The rotor assembly comprises: a first rotor, a second rotor and a rotating shaft, the first rotor is cylindrical, the second rotor is tubular, the outer diameter of the first rotor is the same as the inner diameter of the second rotor, wherein:

[0007] The first rotor is arranged inside the second rotor, and the rotating shaft is arranged through the axis of the first rotor and is fixed to the first rotor by interference fit;

[0008] The stator assembly comprises: a first stator and a second stator, wherein the first stator and the second stator are both in a cylindrical shape, the inner diameter of the first stator is the same as the outer diameter of the second stator, and the inner diameter of the second stator is larger than the outer diameter of the second rotor, wherein:

[0009] The second stator is arranged in the first stator;

[0010] The driving roller is disposed between the second rotor and the second stator, the driving roller is parallel to the rotating shaft, the driving rollers are arranged symmetrically with equal intervals based on the rotating shaft, and the driving rollers are respectively connected to the outer wall of the second rotor and the inner wall of the second stator;

[0011] The first sealing ring and the second sealing ring are respectively arranged at two ends of the first stator, and two ends of the driving roller are respectively connected to the first sealing ring and the second sealing ring shaft.

[0012] The precision micro-stepping motor according to the embodiment of the utility model can provide extremely small-scale rotational torque.

[0013] In addition, the precision micro-stepping motor proposed in the above embodiment of the utility model may also have the following additional technical features:

[0014] In one embodiment of the present invention, the cross section of the driving roller is a regular polygon.

[0015] In one embodiment of the utility model, the diameter of the circumscribed circle of the cross-section of the driving roller is greater than the distance between the outer wall of the second rotor and the inner wall of the second stator, and the diameter of the inscribed circle of the cross-section of the driving roller is smaller than the distance between the outer wall of the second rotor and the inner wall of the second stator.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0018] Figure 1 The structure of a precision micro stepping motor according to an embodiment of the utility model is shown in FIG. Figure 1 ;

[0019] Figure 2 The structure of a precision micro stepping motor according to an embodiment of the utility model is shown in FIG. Figure 2 ;

[0020] Figure 3 Schematic diagram of the deformation of the driving roller of the precision micro stepping motor according to one embodiment of the utility model Figure 1 ;

[0021] Figure 4 Schematic diagram of the deformation of the driving roller of the precision micro stepping motor according to one embodiment of the utility model Figure 2 ;

[0022] As shown in the figure:

[0023] 1-Rotor assembly;

[0024] 11-first rotor, 12-second rotor, 13-rotating shaft;

[0025] 2- stator assembly;

[0026] 21-first stator, 22-second stator;

[0027] 3- driving roller;

[0028] 4- first sealing ring;

[0029] 5- Second sealing ring. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0031] The precision micro stepping motor of the utility model embodiment is described below with reference to the accompanying drawings;

[0032] like Figure 1 and Figure 2 As shown, a precision micro stepping motor includes: a rotor assembly 1, a stator assembly 2, a plurality of driving rollers 3, a first sealing ring 4 and a second sealing ring 5, wherein:

[0033] The rotor assembly 1 includes: a first rotor 11, a second rotor 12 and a rotating shaft 13. The first rotor 11 is cylindrical, the second rotor 12 is tubular, and the outer diameter of the first rotor 11 is the same as the inner diameter of the second rotor 12.

[0034] The first rotor 11 is disposed inside the second rotor 12, and the rotating shaft 13 is disposed through the axis of the first rotor 11 and is fixed to the first rotor 11 by interference fit;

[0035] The stator assembly 2 includes: a first stator 21 and a second stator 22, both of which are in the shape of a circular tube, the inner diameter of the first stator 21 is the same as the outer diameter of the second stator 22, and the inner diameter of the second stator 22 is larger than the outer diameter of the second rotor 12, wherein:

[0036] The second stator 22 is disposed inside the first stator 21;

[0037] The driving roller 3 is disposed between the second rotor 12 and the second stator 22. The driving roller 3 is parallel to the rotating shaft 13. The driving rollers 3 are arranged symmetrically with equal intervals around the rotating shaft 13. The driving rollers 3 are connected to the outer wall of the second rotor 12 and the inner wall of the second stator 22 respectively.

[0038] The first sealing ring 4 and the second sealing ring 5 are respectively arranged at two ends of the first stator 21, and the two ends of the driving roller 3 are respectively connected to the first sealing ring 4 and the second sealing ring 5;

[0039] In the embodiment of the utility model, the driving roller 3 is used to generate a small deformation at a local temperature rise, thereby driving the rotor assembly 1 to rotate relative to the stator assembly 2;

[0040] Specifically, in the precision micro-stepping motor, when the power is turned on for the second rotor 12 and the second stator 22, a closed loop is formed between the second rotor 12, the driving roller 3 and the second stator 22. At this time, the contact area between the driving roller 3 and the second rotor 12 and the second stator 22 is small, so it will heat up quickly, thereby causing the contact area between the driving roller 3 and the second rotor 12 and the second stator 22 to expand. At this time, the cross-section of the driving roller 3 is elliptical, and the driving roller 3 generates a rotational torque on the second rotor 12 and the second stator 22, which ultimately causes the rotor assembly 1 to rotate relative to the stator assembly 2;

[0041] In addition, the cross section of the driving roller 3 is a regular polygon, the diameter of the circumscribed circle of the cross section of the driving roller 3 is larger than the distance between the outer wall of the second rotor 12 and the inner wall of the second stator 22, and the diameter of the inscribed circle of the cross section of the driving roller 3 is smaller than the distance between the outer wall of the second rotor 12 and the inner wall of the second stator 22;

[0042] Specifically, in order to ensure that the driving roller 3 provides a better rotational torque, the cross section of the driving roller 3 can be set to a regular polygon, for example, it can be set to a regular hexadecagon;

[0043] When a closed loop is formed between the second rotor 12, the driving roller 3 and the second stator 22, as shown in FIG. Figure 3 and Figure 4 As shown, at this time, the contact area between the driving roller 3 and the second rotor 12 and the second stator 22 is small, so it will heat up quickly, causing the contact area between the driving roller 3 and the second rotor 12 and the second stator 22 to expand, as shown in FIG. Figure 3 and Figure 4 As shown in the dotted line position, the cross section of the driving roller 3 is elliptical at this time. At this time, the rotor assembly 1 will produce an obvious sense of frustration during rotation, thereby better controlling the rotational torque of the precision micro stepper motor.

[0044] In summary, the precision micro stepper motor disclosed in the embodiment of the utility model can provide extremely small-scale rotational torque.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A precision micro stepping motor, characterized in that: include: A rotor assembly (1), a stator assembly (2), a plurality of drive rollers (3), a first sealing ring (4) and a second sealing ring (5), wherein: The rotor assembly (1) comprises: a first rotor (11), a second rotor (12) and a rotating shaft (13); the first rotor (11) is cylindrical, the second rotor (12) is tubular, the outer diameter of the first rotor (11) and the inner diameter of the second rotor (12) are the same, wherein: The first rotor (11) is arranged inside the second rotor (12); the rotating shaft (13) is arranged through the axis of the first rotor (11) and is fixed to the first rotor (11) by means of interference fit; The stator assembly (2) comprises: a first stator (21) and a second stator (22), the first stator (21) and the second stator (22) are both in the shape of a circular tube, the inner diameter of the first stator (21) is the same as the outer diameter of the second stator (22), the inner diameter of the second stator (22) is greater than the outer diameter of the second rotor (12), wherein: The second stator (22) is arranged inside the first stator (21); The driving roller (3) is arranged between the second rotor (12) and the second stator (22); the driving roller (3) is parallel to the rotating shaft (13); the driving rollers (3) are arranged symmetrically with equal intervals around the rotating shaft (13); and the driving rollers (3) are respectively connected to the outer wall of the second rotor (12) and the inner wall of the second stator (22); The first sealing ring (4) and the second sealing ring (5) are respectively arranged at the two ends of the first stator (21), and the two ends of the driving roller (3) are respectively connected to the first sealing ring (4) and the second sealing ring (5) shafts.

2. The precision micro-stepping motor according to claim 1, characterized in that: The cross section of the driving roller (3) is a regular polygon.

3. The precision micro-stepping motor according to claim 2, characterized in that: The diameter of the circumscribed circle of the cross section of the driving roller (3) is greater than the distance between the outer wall of the second rotor (12) and the inner wall of the second stator (22), and the diameter of the inscribed circle of the cross section of the driving roller (3) is smaller than the distance between the outer wall of the second rotor (12) and the inner wall of the second stator (22).

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