Stepping motor with novel structure

Abstract

The utility model discloses a stepping motor with a novel structure, which comprises a shell, one end of the shell is connected with an end cover, a rotor and permanent magnetic steel are arranged in the shell, one end of the permanent magnetic steel penetrates through the shell and is exposed outside, a rotating shaft is fixedly arranged on the rotor, a first bearing and a second bearing are fixedly arranged on the rotating shaft, and the first bearing and the second bearing are fixedly arranged on the shell. The rotating shaft is rotationally connected with the end cover and the shell through a first bearing and a second bearing respectively, and relates to the technical field of stepping motors, the shell is arranged, and the shell is provided with a through hole communicated with an inner cavity of the shell, so that one side of the permanent magnetic steel is exposed to the outside and is in direct contact with air, the permanent magnetic steel can effectively dissipate heat, and the service life of the permanent magnetic steel is prolonged. Therefore, the permanent magnet steel is prevented from being damaged due to over-high temperature. Bearings are arranged at the two ends of the rotating shaft to be rotationally connected with the end cover and the shell correspondingly, so that the rotating shaft can rotate more stably; and the stepping motor is simple in structure and convenient to disassemble and assemble.

Description

Technical Field

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

[0002] A stepper motor is a discrete value control motor that converts an electric pulse excitation signal into a corresponding angular displacement or linear displacement. This type of motor moves one step each time an electric pulse is input, so it is also called a pulse motor. A stepper motor is a micro motor that converts an electric pulse signal into an angular displacement to control the rotation of the rotor. It is used as an actuator in an automatic control device. Each time a pulse signal is input, the stepper motor moves one step forward, so it is also called a pulse motor. Stepper motors are mostly used in external devices of digital computers, as well as printers, plotters, disks and other devices.

[0003] The existing stepper motor has the following shortcomings:

[0004] The silicon steel sheet is completely wrapped in the shell, and the silicon steel sheet will undergo magnetization and demagnetization when working, which will produce a certain magnetization loss, thereby causing heat, so the heat dissipation of the silicon steel sheet is poor; when the temperature of the silicon steel sheet exceeds a certain value, the inside of the steel sheet begins to recrystallize, thereby destroying the original optimal direction of "magnetic conductivity", thereby deteriorating the performance of the stepper motor. Utility Model Content

[0005] In view of the problems existing in an existing stepping motor with a new structure, the utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a new type of structural stepper motor, which solves the problem that the silicon steel sheet is completely wrapped in the shell, and the silicon steel sheet will undergo magnetization and demagnetization process during operation, which will produce a certain magnetization loss, thereby causing heat, and therefore the heat dissipation of the silicon steel sheet is poor; when the temperature of the silicon steel sheet exceeds a certain value, the inside of the steel sheet begins to recrystallize, thereby destroying the original optimal direction of "magnetic conductivity", thereby causing the performance of the stepper motor to deteriorate.

[0007] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0008] A new type of stepping motor comprises a shell, one end of which is connected to an end cover, a rotor and a permanent magnet are arranged in the shell, and one end of the permanent magnet passes through the shell and is exposed outside.

[0009] As a preferred solution of a new type of structural stepper motor described in the utility model, wherein: a rotating shaft is fixedly installed on the rotor, a first bearing and a second bearing are fixedly installed on the rotating shaft, and the rotating shaft is rotatably connected to the end cover and the housing through the first bearing and the second bearing respectively.

[0010] As a preferred solution of a novel structure stepping motor described in the utility model, wherein: a first bearing groove is provided on the end cover, and the first bearing is installed in the first bearing groove;

[0011] The housing is provided with a second bearing groove, and the second bearing is arranged in the second bearing groove.

[0012] As a preferred solution of a new type of structural stepper motor described in the utility model, wherein: a rotor cavity and a first coil slot are provided on the shell, the rotor is located in the rotor cavity, a coil is wound around the permanent magnet, and the coil is located in the first coil slot.

[0013] As a preferred solution of a novel structure stepper motor described in the utility model, a thickened disk is integrally provided on the outer side of the end cover, and a through hole for the rotating shaft to pass through is provided on the thickened disk and the end cover.

[0014] As a preferred solution of the novel structure stepping motor described in the utility model, wherein: a second coil slot is opened on the end cover, and one end of the coil is located in the second coil slot.

[0015] As a preferred solution of the novel structure stepping motor described in the utility model, there are two rotors.

[0016] As a preferred solution of a new structure stepper motor described in the utility model, a first fixing block is provided on the outer wall of the shell, a second fixing block is integrally provided on the outer wall of the end cover, and the first fixing block and the second fixing block are fixed by bolts.

[0017] As a preferred solution of a novel structure stepping motor described in the utility model, wherein: a first limiting wedge-shaped groove is provided on the outer wall of the first bearing, a first limiting wedge-shaped protrusion is provided on the inner wall of the first bearing groove, and the first limiting wedge-shaped protrusion is located in the first limiting wedge-shaped groove;

[0018] A second limiting wedge-shaped groove is provided on the outer wall of the second bearing, a second limiting wedge-shaped protrusion is provided on the inner wall of the second bearing groove, and the second limiting wedge-shaped protrusion is located in the second limiting wedge-shaped groove.

[0019] Compared with existing technologies:

[0020] 1. By providing a shell with a through hole connected to its inner cavity, one side of the permanent magnet is exposed to the outside and directly in contact with the air, so that the permanent magnet can effectively dissipate heat, thereby avoiding damage to the permanent magnet due to excessive temperature;

[0021] 2. Bearings are provided at both ends of the rotating shaft to respectively connect with the end cover and the housing for rotation, so that the rotation of the rotating shaft can be more stable; and the stepper motor has a simple structure and is easy to disassemble and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure provided by the utility model;

[0023] Figure 2 The utility model provides Figure 1 A cross-sectional view of

[0024] Figure 3 The utility model provides Figure 1 Rear view of.

[0025] In the figure: end cover 1, shell 2, second coil slot 3, first bearing slot 4, rotor cavity 5, permanent magnet 6, coil 7, first coil slot 8, first bearing 9, second bearing 10, rotor 11, rotating shaft 12, through hole 13, second fixing block 14, first fixing block 15, second bearing slot 16, first coil slot 17, thickened disk 18. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clear, the implementation methods of the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] The utility model provides a new type of stepping motor, please refer to Figure 1-3 , including a shell 2, one end of which is connected to an end cover 1, specifically, a first fixing block 15 is provided on the outer wall of the shell 2, and a second fixing block 14 is integrally provided on the outer wall of the end cover 1, the first fixing block 15 and the second fixing block 14 are fixed by bolts, and a plurality of first fixing blocks 15 and second fixing blocks 14 can be provided, a rotor 11 and a permanent magnet 6 are provided in the shell 2, and two rotors 11 are provided, and one end of the permanent magnet 6 passes through the shell 2 and is exposed to the outside, so as to directly contact with the air, thereby effectively improving.

[0028] A rotating shaft 12 is fixedly mounted on the rotor 11, and a first bearing 9 and a second bearing 10 are fixedly mounted on the rotating shaft 12. The rotating shaft 12 is rotatably connected to the end cover 1 and the housing 2 through the first bearing 9 and the second bearing 10 respectively; a first bearing groove 4 is provided on the end cover 1, and the first bearing 9 is installed in the first bearing groove 4, and a first limiting wedge groove is provided on the outer wall of the first bearing 9, and a first limiting wedge protrusion is provided on the inner wall of the first bearing groove 4, and the first limiting wedge protrusion is located in the first limiting wedge groove; the rotating shaft 12 is rotatably connected to the bearings at two locations, so that the stability of the rotating shaft 12 can be effectively ensured;

[0029] A second bearing groove 16 is provided on the housing 2, the second bearing 10 is arranged in the second bearing groove 16, and a second limiting wedge groove is provided on the outer wall of the second bearing 10, and a second limiting wedge protrusion is provided on the inner wall of the second bearing groove 16, and the second limiting wedge protrusion is located in the second limiting wedge groove.

[0030] A rotor cavity 5 and a first coil slot 8 are provided on the shell 2, and the rotor 11 is located in the rotor cavity 5. A coil 7 is wound on the permanent magnet 6. Since the coil 7 is tightly sleeved on the permanent magnet 6, the coil 7 plays a role in fixing the permanent magnet 6. A second coil slot 3 is provided on the end cover 1, and one end of the coil 7 is located in the second coil slot 3, and the other end of the coil 7 is located in the first coil slot 8. The second coil slot 3 and the first coil slot 8 are used to limit the coil 7 to maintain the stability of the coil 7, and a second limiting wedge groove is provided on the outer wall of the second bearing 10, and a second limiting wedge protrusion is provided on the inner wall of the second bearing slot 16, and the second limiting wedge protrusion is located in the second limiting wedge groove.

[0031] A thickened disk 18 is integrally provided on the outer side of the end cover 1 . The existence of the thickened disk 18 can strengthen the support for the first bearing 9 . A through hole 13 for the rotating shaft 12 to pass through is provided on the thickened disk 18 and the end cover 1 .

[0032] During specific use, the coil 7 is sleeved on the permanent magnet 6, the first bearing 9, the rotor 11 and the second bearing 10 are all installed on the rotating shaft 12, the permanent magnet 6 and the rotor 11 are placed in the shell 2 together, the rotor 11 is located in the rotor cavity 5, the first bearing 9 and the second bearing 10 are respectively located in the first bearing groove 4 and the second bearing groove 16, and one end of the coil 7 is located in the first coil groove 8; the end cover 1 is aligned with the shell 2 so that the first bearing 9 enters the first bearing groove 4; the second fixing block 14 and the first fixing block 15 are fixed with bolts to achieve the fixation between the end cover 1 and the shell 2.

[0033] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A novel stepping motor, comprising a housing (2), one end of the housing (2) being connected to an end cover (1), a rotor (11) and a permanent magnet (6) being arranged in the housing (2), characterized in that: One end of the permanent magnetic steel (6) passes through the housing (2) and is exposed outside.

2. A new type of stepping motor according to claim 1, characterized in that: A rotating shaft (12) is fixedly mounted on the rotor (11), a first bearing (9) and a second bearing (10) are fixedly mounted on the rotating shaft (12), and the rotating shaft (12) is rotatably connected to the end cover (1) and the housing (2) via the first bearing (9) and the second bearing (10), respectively.

3. A new type of stepping motor according to claim 2, characterized in that: The end cover (1) is provided with a first bearing groove (4), and the first bearing (9) is installed in the first bearing groove (4); The housing (2) is provided with a second bearing groove (16), and the second bearing (10) is arranged in the second bearing groove (16).

4. A new type of stepping motor according to claim 1, characterized in that: The housing (2) is provided with a rotor cavity (5) and a first coil slot (8); the rotor (11) is located in the rotor cavity (5); a coil (7) is wound around the permanent magnet (6); and the coil (7) is located in the first coil slot (8).

5. A new type of stepping motor according to claim 1, characterized in that: A thickened disk (18) is integrally provided on the outer side of the end cover (1), and a through hole (13) for the rotating shaft (12) to pass through is provided on the thickened disk (18) and the end cover (1).

6. A new type of stepping motor according to claim 4, characterized in that: The end cover (1) is provided with a second coil slot (3), and one end of the coil (7) is located in the second coil slot (3).

7. A new type of stepping motor according to claim 1, characterized in that: Two rotors (11) are provided.

8. A new type of stepping motor according to claim 1, characterized in that: A first fixing block (15) is provided on the outer wall of the shell (2), and a second fixing block (14) is integrally provided on the outer wall of the end cover (1), and the first fixing block (15) and the second fixing block (14) are fixed by bolts.

9. A new type of stepping motor according to claim 3, characterized in that: A first limiting wedge-shaped groove is provided on the outer wall of the first bearing (9), a first limiting wedge-shaped protrusion is provided on the inner wall of the first bearing groove (4), and the first limiting wedge-shaped protrusion is located in the first limiting wedge-shaped groove; A second limiting wedge-shaped groove is provided on the outer wall of the second bearing (10), a second limiting wedge-shaped protrusion is provided on the inner wall of the second bearing groove (16), and the second limiting wedge-shaped protrusion is located in the second limiting wedge-shaped groove.

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