Stator structure of stepping motor

Abstract

The utility model discloses a stator structure of a stepping motor, and relates to the technical field of stepping motors, the stator structure of the stepping motor comprises a housing, the housing is provided with arc-shaped iron cores in an annular array, the end portions of the arc-shaped iron cores are integrally provided with support arms, and the other ends of the support arms are fixedly connected with the housing; a coil isolation frame is inserted between the arc-shaped iron core and the shell, coils are arranged on the inner side of the coil isolation frame in an annular array mode, and the coils are wound on the inner side of the coil isolation frame; the coil isolation frame comprises an outer isolation frame, and the inner side of the outer isolation frame is provided with connecting supports and inner isolation rings corresponding to the arc-shaped iron cores in an annular array mode. According to the utility model, as the coil penetrates through the coil mounting groove and is wound on the connecting bracket, when the external isolation frame is disassembled, the coil on the outer side of the connecting bracket can be taken down together, so that a worker can replace the coil conveniently, a professional tool is not needed in the replacement process, field replacement can be carried out, and the replacement time is shortened.

Description

Technical Field

[0001] The utility model specifically relates to the technical field of stepping motors, in particular to a stator structure of a stepping motor. Background Art

[0002] A stepper motor is an open-loop controlled motor that converts electrical pulse signals into angular or linear displacement. It does this by energizing each phase winding of the motor in a certain order, causing the magnetic field generated by the stator to continuously change, thereby driving the rotor to rotate. Each time an electrical pulse is input, the rotor rotates a fixed angle, called the step angle. By controlling the number and frequency of the input pulses, the motor's rotation angle and speed can be precisely controlled.

[0003] A stepper motor generally consists of a stator and a rotor. The stator, typically composed of an iron core and windings, generates a magnetic field that is fundamental to the operation of the stepper motor. The strength and direction of this magnetic field determine the direction and angle of rotation of the rotor. By controlling the on / off and direction of the current in the stator windings, the distribution of the magnetic field can be altered, enabling precise control of the rotor.

[0004] However, in practice, people have noticed that the coil is usually wound on the outside of the iron core. When the stepper motor is overloaded or runs under overload for a long time, the coil will heat up due to the large current it bears. In severe cases, the coil will burn out. After the coil is damaged, it is necessary to remove and replace the coil on the nail. Since the coil is wound on the stator core, professional tools are required to break the coil during disassembly, which takes a long time. The replaced coil also needs to be rewound using professional equipment. Long-term maintenance will affect the normal use of the stepper motor. Utility Model Content

[0005] The present utility model aims to provide a stator structure for a stepper motor, which utilizes a coil isolation frame to remove the coil from between the housing and the arc-shaped core, facilitating coil removal and replacement, and enabling on-site operation, saving replacement time. This solves the technical problems raised in the aforementioned background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A stator structure of a stepping motor includes a housing, wherein the housing is provided with arc-shaped iron cores in an annular array, and the ends of the arc-shaped iron cores are integrally provided with support arms, and the other ends of the support arms are fixedly connected to the housing;

[0008] A coil isolation frame is inserted between the arc-shaped iron core and the shell. Coils are arranged in an annular array on the inner side of the coil isolation frame, and the coils are wound on the inner side of the coil isolation frame.

[0009] As a further technical solution of the present invention, the coil isolation frame includes an outer isolation frame, the inner side of the outer isolation frame is provided with a connecting bracket and an inner isolation ring corresponding to the arc-shaped iron core in a ring array, and the two ends of the connecting bracket are respectively integrated with the outer isolation frame and the inner isolation ring.

[0010] As a further technical solution of the present invention, each end of the connecting bracket is provided with a coil installation groove and a positioning groove, wherein the support arm is inserted into the positioning groove at the corresponding position, and the coil passes through the coil installation groove and is wrapped around the outside of the connecting bracket.

[0011] As a further technical solution of the present invention, the inner isolation ring is fitted with a side of the arc-shaped iron core close to the shell, and the support arm is located on a side of the coil away from the connecting bracket.

[0012] As a further technical solution of the present invention, the outer isolation frame is fitted with the inner side of the outer shell, and an L-shaped wire rack is integrally provided at the inner corner of the outer isolation frame. The L-shaped wire rack is located on the side of the outer isolation frame away from the positioning groove.

[0013] As a further technical solution of the present invention, an end reinforcement frame is provided on the side of the coil isolation frame away from the support arm, and the end reinforcement frame includes a fixed outer frame that is in contact with the end of the shell, and the fixed outer frame is provided with positioning through holes corresponding to the threaded holes in a circular array.

[0014] As a further technical solution of the present invention, the inner side of the fixed outer frame is provided with an extended connecting plate in a ring array, one end of the extended connecting plate is integrally provided with the fixed outer frame, and each end of the extended connecting plate is integrally provided with a limit ring corresponding to the arc-shaped iron core.

[0015] As a further technical solution of the present invention, the arc-shaped iron core is provided with rectangular grooves in a ring array on the side away from the outer shell, and the side of the limit ring is integrally provided with plug-in positioning columns corresponding to the rectangular grooves, and the ends of the plug-in positioning columns are inserted into the rectangular grooves.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] In the present invention, since the coil passes through the coil installation slot and is wound around the connecting bracket, when the external isolation frame is disassembled, the coil outside the connecting bracket can be removed together, which is convenient for workers to replace the coil. In addition, no professional tools are required during the replacement process, and the coil can be replaced on site, thus shortening the replacement time.

[0018] The utility model inserts the outer isolation frame to be replaced between the outer shell and the arc-shaped iron core, and ensures that the support arm is inserted into the positioning groove at the end of the outer isolation frame, which plays a positioning role for the outer isolation frame and ensures that each coil corresponds to a arc-shaped iron core;

[0019] According to the utility model, after replacement, the fixed outer frame is fitted to the end of the shell, and the plug-in positioning column in the fixed outer frame is inserted into the rectangular groove in the coil isolation frame, which has a positioning effect, supports the end of the arc-shaped iron core, and can also play a limiting role on the coil isolation frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model in use state.

[0021] Figure 2 This utility model Figure 1 Another perspective of the picture.

[0022] Figure 3 This utility model Figure 2 Schematic diagram of the internal structure.

[0023] Figure 4 This utility model Figure 1 Schematic diagram of part of the structure.

[0024] Figure 5 This utility model Figure 4 A partial enlarged schematic diagram.

[0025] Figure 6 This utility model Figure 4 Another perspective of the picture.

[0026] Figure 7 It is a three-dimensional structural diagram of the coil isolation frame in the utility model.

[0027] Figure 8 This utility model Figure 7 A partial enlarged schematic diagram.

[0028] Figure 9 This utility model Figure 7 Another perspective of the picture.

[0029] Figure 10 This utility model Figure 9 A partial enlarged schematic diagram.

[0030] Figure 11 It is a schematic diagram of the three-dimensional structure of the end reinforcement frame of the utility model.

[0031] In the picture:

[0032] Shell-1, arc-shaped iron core-2, coil isolation frame-3, outer isolation frame-31, connecting bracket-32, inner isolation ring-33, L-shaped wire frame-34, positioning slot-35, coil mounting slot-36, coil-4, end reinforcement frame-5, fixed outer frame-51, positioning through hole-52, extended connecting plate-53, limit ring-54, plug-in positioning column-55, threaded hole-6, support arm-7. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] See also Figure 1-11 The embodiment of the present invention provides a stator structure of a stepping motor, comprising a housing 1, wherein the housing 1 is provided with an arc-shaped iron core 2 in an annular array, and an end of the arc-shaped iron core 2 is integrally provided with a support arm 7, and the other end of the support arm 7 is fixedly connected to the housing 1;

[0035] A coil isolation frame 3 is inserted between the arc-shaped iron core 2 and the shell 1 . Coils 4 are arranged in a ring array on the inner side of the coil isolation frame 3 , and the coils 4 are wound on the inner side of the coil isolation frame 3 .

[0036] In this embodiment, the coil isolation frame 3 includes an outer isolation frame 31, and the inner side of the outer isolation frame 31 is provided with a connecting bracket 32 and an inner isolation ring 33 corresponding to the arc-shaped iron core 2 in a ring array. The two ends of the connecting bracket 32 are respectively integrated with the outer isolation frame 31 and the inner isolation ring 33.

[0037] In this embodiment, each end of the connecting bracket 32 is provided with a coil mounting groove 36 and a positioning groove 35, wherein the support arm 7 is inserted into the positioning groove 35 at the corresponding position, and the coil 4 passes through the coil mounting groove 36 and is wrapped around the outside of the connecting bracket 32.

[0038] In this embodiment, the inner isolation ring 33 is in contact with the side of the arc-shaped core 2 close to the housing 1 , and the support arm 7 is located on the side of the coil 4 away from the connecting bracket 32 .

[0039] In this embodiment, the outer isolation frame 31 is fitted with the inner side of the housing 1 , and an L-shaped wire rack 34 is integrally provided at the inner corner of the outer isolation frame 31 . The L-shaped wire rack 34 is located on the side of the outer isolation frame 31 away from the positioning groove 35 .

[0040] In this embodiment, the coil isolation frame 3 is provided with an end reinforcement frame 5 on the side away from the support arm 7. The end reinforcement frame 5 includes a fixed outer frame 51 that is in contact with the end of the shell 1. The fixed outer frame 51 is provided with positioning through holes 52 corresponding to the threaded holes 6 in a circular array.

[0041] In this embodiment, the inner side of the fixed outer frame 51 is provided with an extended connecting plate 53 in a circular array, one end of the extended connecting plate 53 is integrally provided with the fixed outer frame 5, and each end of the extended connecting plate 53 is integrally provided with a limit ring 54 corresponding to the arc-shaped iron core 2.

[0042] In this embodiment, the arc-shaped iron core 2 is provided with rectangular grooves in a ring array on the side away from the shell 1, and the side of the limit ring 54 is integrally provided with a plug-in positioning column 55 corresponding to the rectangular groove, and the end of the plug-in positioning column 55 is inserted into the rectangular groove.

[0043] By adopting the above technical solution, when the coil 4 in the stepper motor is damaged, it is necessary to first remove the bolts at the connection between the back cover of the stepper motor and the outer shell 1, and at the same time separate the bolts from the positioning through holes 52, and then remove the fixed outer frame 51, pull the outer isolation frame 31 outward, and take the outer isolation frame 31 out from between the outer shell 1 and the arc-shaped iron core 2. Since the coil 4 is wound on the connecting bracket 32, it will drive the coil 4 to separate from between the outer shell 1 and the arc-shaped iron core 2, which is convenient for the staff to replace the coil 4. The whole process does not require the use of professional tools and can be performed on site, shortening the time consumption during replacement.

[0044] In this embodiment, the extended connecting plate 53 and the limit ring 54 are respectively distributed corresponding to the arc core 2, and the arc core 2 is supported at one end away from the support arm 7 so that the arc core 2 fits with the inner isolation ring 33.

[0045] In this embodiment, the extended connecting plate 53 is located on the side of the coil 4 away from the connecting bracket 32. The extended connecting plate 53 limits the coil isolation frame 3 and the coil 4 to prevent the coil isolation frame 3 and the coil 4 from sliding out from the side of the housing 1.

[0046] In this embodiment, the fixed outer frame 51 is attached to the end of the outer shell 1, and the positioning through hole 52 on the fixed outer frame 51 is coaxially arranged with the threaded hole 6 at the end of the outer shell 1. The bolt passes through the positioning through hole 52 and is threadedly connected to the threaded hole 6, thereby fixing the fixed outer frame 51 to the side of the outer shell 1.

[0047] The working principle of the present invention is: when in use, first remove the bolts at the end of the shell 1, remove the bolts from the positioning through holes 52 and the threaded holes 6, then move the fixed outer frame 51 to the side, separate the plug-in positioning column 55 from the rectangular groove on the side of the arc-shaped iron core 2, and then move the coil isolation frame 3 to the side. Since the coil 4 is completely wound on the coil isolation frame 3, the coil isolation frame 3 will drive the coil 4 to separate from the inner side of the shell 1 when it moves, and then take a new coil isolation frame 3 and coil 4 and insert them into the shell 1 to complete the replacement of the coil 4. Finally, re-fix the fixed outer frame 51 to the side of the shell 1, which is convenient for the staff to quickly replace the coil 4, and the entire replacement process does not require the use of professional tools, reducing the time consumption during replacement.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0049] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A stator structure of a stepping motor, characterized by: The housing (1) comprises an annular array of arc-shaped iron cores (2), and the ends of the arc-shaped iron cores (2) are integrally provided with support arms (7), the other ends of the support arms (7) being fixedly connected to the housing (1); A coil isolation frame (3) is inserted between the arc-shaped iron core (2) and the shell (1), and a coil (4) is provided in a ring array on the inner side of the coil isolation frame (3), and the coil (4) is wound on the inner side of the coil isolation frame (3).

2. The stator structure of the stepping motor according to claim 1, characterized in that: The coil isolation frame (3) includes an outer isolation frame (31), the inner side of the outer isolation frame (31) is provided with a connecting bracket (32) and an inner isolation ring (33) corresponding to the arc-shaped iron core (2) in an annular array, and the two ends of the connecting bracket (32) are respectively integrally arranged with the outer isolation frame (31) and the inner isolation ring (33).

3. The stator structure of the stepping motor according to claim 2, characterized in that: Each of the connecting brackets (32) is provided with a coil mounting slot (36) and a positioning slot (35) at its end, wherein the support arm (7) is inserted into the positioning slot (35) at the corresponding position, and the coil (4) passes through the coil mounting slot (36) and is wound around the outside of the connecting bracket (32).

4. The stator structure of the stepping motor according to claim 3, characterized in that: The inner isolation ring (33) is in contact with the side of the arc-shaped iron core (2) close to the housing (1), and the support arm (7) is located on the side of the coil (4) away from the connecting bracket (32).

5. The stator structure of the stepping motor according to claim 4, characterized in that: The outer isolation frame (31) is fitted with the inner side of the housing (1), and an L-shaped wire rack (34) is integrally provided at the inner corner of the outer isolation frame (31). The L-shaped wire rack (34) is located on a side of the outer isolation frame (31) away from the positioning groove (35).

6. The stator structure of the stepping motor according to claim 5, characterized in that: An end reinforcement frame (5) is provided on the side of the coil isolation frame (3) away from the support arm (7), and the end reinforcement frame (5) includes a fixed outer frame (51) that is in contact with the end of the housing (1), and positioning through holes (52) corresponding to the threaded holes (6) are provided in a circular array on the fixed outer frame (51).

7. The stator structure of the stepping motor according to claim 6, characterized in that: The inner side of the fixed outer frame (51) is provided with an annular array of extended connecting plates (53), one end of the extended connecting plate (53) is integrally provided with the fixed outer frame (51), and the end of each extended connecting plate (53) is integrally provided with a limit ring (54) corresponding to the arc-shaped iron core (2).

8. The stator structure of the stepping motor according to claim 7, characterized in that: The arc-shaped iron core (2) is provided with rectangular grooves in a ring array on one side away from the housing (1), and the side of the limit ring (54) is integrally provided with plug-in positioning columns (55) corresponding to the rectangular grooves, and the ends of the plug-in positioning columns (55) are plugged into the rectangular grooves.

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