Stepping motor with magnetic interference prevention device

Abstract

The invention discloses a stepping motor with an anti-magnetic interference device, and relates to the technical field of motors. The stepping motor comprises a stepping motor main body, the top of the stepping motor main body is fixedly connected with a wire connector, and the top of the stepping motor main body is fixedly connected with a motor magnetic sheet. Through cooperation of the motor magnetic sheet, the stepping motor body, the rotating shaft, the anti-winding device, the hollow frame, the connecting column and the double-end cutting knife, the motor magnetic sheet is attached to the surface of the stepping motor body, the motor magnetic sheet can provide a certain magnetic shielding effect, interference of an external magnetic field on motor operation is reduced, the magnetic interference capability of the motor is enhanced, and the service life of the motor is prolonged. And the double-head cutting knife can cut weeds wound around the stepping motor main body and the rotating shaft, so that the problems that the rotating shaft cannot rotate freely or rotation is blocked due to the fact that the weeds are wound around the stepping motor main body and the rotating shaft, and normal operation of the stepping motor is affected are solved.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a stepping motor with an anti-magnetic interference device. Background Art

[0002] A stepper motor is an electric motor that converts electrical energy into mechanical rotational motion. Its main feature is that it can accurately control the angle, speed and position of the rotor according to the input pulse signal. Unlike traditional DC motors, stepper motors use the electromagnetic drive principle and a series of timed current pulses to force the rotor to rotate step by step at a fixed angle (step angle), thereby achieving high-precision positioning and speed control.

[0003] A Chinese patent with patent announcement number CN118984002A discloses an anti-magnetic interference device for a stepper motor, including a shell assembly, a motor rotor is arranged inside the shell assembly, a first shielding cover mechanism is arranged on the outside of the motor rotor, a second shielding cover is arranged on the outside of the first shielding cover mechanism, a cooling mechanism is arranged at the bottom of the shell assembly, the shell assembly includes a coil shield, the coil shield is used to shield the interference of the coil, the first shielding cover mechanism includes a gear pump assembly, the gear pump assembly is used to circulate the coolant, the spur gear is driven to rotate by the rotation of the rotating shaft when the motor is working, the spur gear meshes with the bevel gear to rotate and drive the pump teeth to rotate through the transmission shaft, the coolant flows and circulates in the tooth gaps of the pump teeth and the gear grooves, and the cooling mechanism works synchronously when the stepper motor rotates, thereby avoiding the demagnetization problem of the permanent magnet caused by the equipment not cooling down in time when the motor is working.

[0004] However, the current stepper motor has the following problems: the stepper motor can only be fixed in a certain place to achieve anti-magnetic interference. When the stepper motor body is used in a lawn mower, it is difficult to protect the stepper motor from magnetic interference, and weeds will be entangled around the stepper motor body and the shaft, causing the shaft to be unable to rotate freely or the rotation to be blocked, thereby affecting the normal operation of the stepper motor and making it unable to perform tasks at the predetermined accuracy and speed. Therefore, we propose a stepper motor with an anti-magnetic interference device. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a stepping motor with an anti-magnetic interference device, which solves the problems raised in the above background technology.

[0006] To achieve the above object, the present invention is realized by the following technical solutions: A stepping motor with an anti-magnetic interference device, including a stepping motor main body, a connector is fixedly connected to the top of the stepping motor main body, a motor magnetic patch is fixedly connected to the top of the stepping motor main body, a rotating shaft is fixedly connected to the output end of the stepping motor main body, and an anti-winding device is arranged on the outer wall of the rotating shaft. The anti-winding device includes a hollow frame, the inner wall of the hollow frame is fixedly connected to the outer wall of the rotating shaft, a connecting column is fixedly connected to the side of the hollow frame, and a double-headed cutting knife is fixedly connected to the outer wall of the connecting column. The motor magnetic patch is attached to the surface of the stepping motor main body. At the same time, the rotation of the rotating shaft drives the hollow frame to rotate, the rotation of the hollow frame drives the connecting column to rotate, the rotation of the connecting column drives the double-headed cutting knife to rotate, and the double-headed cutting knife cuts the weeds wound around the stepping motor main body and the rotating shaft.

[0007] According to the above technical solution, an L-shaped rod is fixedly connected to the end of the connecting column away from the hollow frame, a fixing block is fixedly connected to the end of the L-shaped rod away from the connecting column, a connecting rod is rotatably connected to the side of the fixing block, a guiding plate is fixedly connected to the end of the connecting rod away from the fixing block, a torsion spring is arranged between the guiding plate and the fixing block, an elastic plate is fixedly connected to the side of the guiding plate, a resisting block is fixedly connected to the side of the stepping motor main body, a plurality of triangular plates are fixedly connected to the side of the guiding plate, one side of the resisting block is arc-shaped, and the arc-shaped side of the resisting block is located on the displacement track of the elastic plate. When the connecting column rotates following the hollow frame, the connecting column drives the L-shaped rod to rotate, the rotation of the L-shaped rod drives the fixing block to rotate, the rotation of the fixing block drives the connecting rod to rotate, the rotation of the connecting rod drives the guiding plate to rotate, the rotation of the guiding plate drives the elastic plate to rotate. When the elastic plate touches the arc surface of the resisting block, it will displace and deform. The displacement of the elastic plate drives the connecting rod to rotate along the side of the fixing block through the guiding plate. The rotation of the guiding plate deforms the torsion spring. When the elastic plate no longer moves on the arc surface of the resisting block, the torsion spring makes the guiding plate, the connecting rod and the elastic plate reset through its own elastic force. So on and so forth, thus making the guiding plate swing back and forth.

[0008] According to the above technical solution, an anti-adhesion device is provided on the side of the stepping motor body. The anti-adhesion device includes an orbital ring, and a slider is slidably connected to the inner wall of the orbital ring. A long rod is fixedly connected to the side of the slider, and a connecting ring is fixedly connected to the end of the long rod away from the slider. A limit block is slidably mounted on the outer wall of the long rod, and a first spring is provided between the limit block and the connecting ring. A fixed column is fixedly connected to the bottom of the limit block, and a scraping block is fixedly connected to the bottom of the fixed column. A U-shaped block is fixedly connected to the side of the stepping motor body, and the U-shaped block is located on the displacement track of the fixed column. The bottom of the scraping block is slidably connected to the top of the double-headed cutting knife. The rotation of the double-headed cutting knife will drive the scraping block to rotate. The rotation of the scraping block drives the fixed column to rotate. The rotation of the fixed column will contact the surface of the U-shaped block, so that the fixed column drives the scraping block and the limit block to move on the surface of the double-headed cutting knife and the outer wall of the long rod respectively. The movement of the limit block will compress the first spring. When the fixed column rotates away from contacting the surface of the U-shaped block, the first spring will reset by its own elastic force. The reset of the first spring will drive the limit block to reset. In this way, the limit block moves back and forth. The back-and-forth movement of the limit block will cause the scraping block to move back and forth on the surface of the double-headed cutting knife through the fixed column.

[0009] According to the above technical solution, an L-shaped plate is fixedly connected to the top of the stepping motor body. A support ring is fixedly connected to the lower part of the inner wall of the L-shaped plate. A number of spherical blocks are fixedly connected to the inner wall of the support ring. A U-shaped plate is fixedly connected to the side of the hollow frame. A long cross bar penetrates and slides on the circumferential surface of the fixed column. A moving arc plate is fixedly connected to the outer wall of the long cross bar. A knocking rod is fixedly connected to the side of the moving arc plate. A second spring is provided between the moving arc plate and the knocking rod. The end of the long cross bar away from the moving arc plate is arc-shaped. A number of the spherical blocks are located on the displacement track of the arc-shaped end of the long cross bar. The scraping block is located on the displacement track of the knocking rod. The rotation of the fixed column will drive the long cross bar to rotate. The rotation of the long cross bar will contact the spherical blocks, so that the long cross bar moves away from the support ring. The movement of the long cross bar will drive the moving arc plate to move. The movement of the moving arc plate drives the knocking rod away from the scraping block and compresses the second spring. When the rotation of the long cross bar does not contact the spherical blocks, the second spring will reset by its own elastic force. The reset of the second spring drives the moving arc plate and the knocking rod to reset. The reset of the knocking rod will knock on the scraping block.

[0010] The present invention provides a stepping motor with an anti-magnetic interference device. It has the following beneficial effects:

[0011] (1) The present invention makes the motor magnetic sheet attached to the surface of the stepper motor body through the cooperation of the motor magnetic sheet, the stepper motor body, the rotating shaft, the anti-winding device, the hollow frame, the connecting column and the double-headed cutting knife. The motor magnetic sheet can provide a certain magnetic shielding effect, reduce the interference of the external magnetic field on the motor operation, and enhance the magnetic interference ability of the motor. The double-headed cutting knife can cut the weeds wrapped around the stepper motor body and the rotating shaft, thereby avoiding the weeds being wrapped around the stepper motor body and the rotating shaft, resulting in the rotating shaft being unable to rotate freely or being blocked, affecting the normal operation of the stepper motor; at the same time, through the cooperation of the double-headed cutting knife, the connecting column, the L-shaped rod, the fixing block, the connecting rod, the guide plate, the elastic plate and the abutment block, the connecting rod and the elastic plate are reset, and so on and so forth, so that the guide plate swings back and forth. The reciprocating motion of the guide plate guides the cut weeds to the surroundings of the rotating shaft, thereby avoiding the cut weeds accumulating between the rotating shaft and the stepper motor body and forming a blockage.

[0012] (2) The present invention uses the cooperation of the guide plate, the triangular plate, and the double-headed cutting knife to distribute the cut weeds more evenly to various areas around the rotating shaft, rather than concentrating them in a certain part. This not only avoids blockage, but also keeps the cutting area clean, making the cutting process smoother and the motor able to operate continuously and efficiently. In addition, the triangular shape of the triangular plate itself can produce a "cutting" or "pressing" effect, helping to split the weeds, especially the harder or thicker grass stems, so that the weeds will not form excessive friction near the rotating shaft due to accumulation, thereby preventing the weeds from getting stuck or causing resistance to the rotating shaft.

[0013] (3) The present invention arranges a track ring, a slider, a long rod, a connecting ring, a limit block, a fixed column, a scraper block, and a U-shaped block, so that the limit block can move back and forth. The reciprocating movement of the limit block can cause the scraper block to move back and forth on the surface of the double-headed cutting knife through the fixed column, thereby pushing away the weeds adhering to the surface of the double-headed cutting knife, thereby preventing the weeds from affecting the cutting efficiency of the double-headed cutting knife; at the same time, through the U-shaped block, L-shaped plate, supporting ring, ball block, U-shaped plate, long cross bar, movable arc plate, and knocking rod, when the rotation of the long cross bar does not conflict with the ball block, the spring 2 can be reset by its own elastic force, and the reset of the spring 2 drives the movable arc plate and the knocking rod to reset, and the reset of the knocking rod will knock the scraper block, thereby avoiding the problem of weeds remaining on the surface of the scraper block after the scraper block has pushed the weeds. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the present invention as a whole;

[0015] Figure 2 This is a schematic diagram of the structure of the rotating shaft of the present invention;

[0016] Figure 3Structural schematic diagram of the double - headed cutting knife of the present invention;

[0017] Figure 4 Structural schematic diagram of the U - shaped block of the present invention;

[0018] Figure 5 Structural schematic diagram of the fixed column of the present invention;

[0019] Figure 6 Structural schematic diagram of the connecting ring of the present invention;

[0020] Figure 7 Structural schematic diagram of the long cross - bar of the present invention.

[0021] In the figure: 1. Stepper motor main body; 2. Connector; 3. Motor magnetic patch; 4. Rotating shaft; 5. Anti - winding device; 51. Hollow frame; 52. Connecting column; 53. Double - headed cutting knife; 54. L - shaped rod; 55. Fixed block; 56. Connecting rod; 57. Guide plate; 58. Triangular plate; 59. Elastic plate; 510. Contact block; 6. Anti - adhesion device; 61. Track ring; 62. Slide block; 63. Long rod; 64. Connecting ring; 65. Limiting block; 66. Fixed column; 67. Scraping block; 68. U - shaped block; 69. L - shaped plate; 610. Support ring; 611. Ball block; 612. U - shaped plate; 613. Long cross - bar; 614. Moving arc plate; 615. Knocking rod. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Please refer to Figure 1 - Figure 7, an embodiment of the present invention is: a stepping motor with an anti-magnetic interference device, including a stepping motor main body 1. A connector 2 is fixedly connected to the top of the stepping motor main body 1. A motor magnetic patch 3 is fixedly connected to the top of the stepping motor main body 1. A rotating shaft 4 is fixedly connected to the output end of the stepping motor main body 1. An anti-winding device 5 is arranged on the outer wall of the rotating shaft 4. The anti-winding device 5 includes a hollow frame 51. The inner wall of the hollow frame 51 is fixedly connected to the outer wall of the rotating shaft 4. A connecting column 52 is fixedly connected to the side of the hollow frame 51. A double-headed cutting knife 53 is fixedly connected to the outer wall of the connecting column 52. Through the setting of the above structure, the motor magnetic patch 3 is attached to the surface of the stepping motor main body 1. The motor magnetic patch 3 can provide a certain magnetic shielding effect, reduce the interference of the external magnetic field on the operation of the motor, enhance the magnetic interference ability of the motor. At the same time, the double-headed cutting knife 53 will cut the weeds wound around the stepping motor main body 1 and the rotating shaft 4, so as to avoid the problem that the weeds are wound around the stepping motor main body 1 and the rotating shaft 4, resulting in the rotating shaft 4 being unable to rotate freely or the rotation being blocked, affecting the normal operation of the stepping motor.

[0024] One end of the connecting column 52 away from the hollow frame 51 is fixedly connected with an L-shaped rod 54. One end of the L-shaped rod 54 away from the connecting column 52 is fixedly connected with a fixing block 55. A connecting rod 56 is rotatably connected to the side of the fixing block 55. One end of the connecting rod 56 away from the fixing block 55 is fixedly connected with a guide plate 57. A torsion spring is arranged between the guide plate 57 and the fixing block 55. An elastic plate 59 is fixedly connected to the side of the guide plate 57. A contact block 510 is fixedly connected to the side of the stepping motor main body 1. A plurality of triangular plates 58 are fixedly connected to the side of the guide plate 57. One side of the contact block 510 is arc-shaped. The arc-shaped side of the contact block 510 is located on the displacement track of the elastic plate 59. Through the setting of the above structure, the torsion spring will reset the guide plate 57, the connecting rod 56 and the elastic plate 59 through its own elastic force, and so on, so that the guide plate 57 swings back and forth. The reciprocating movement of the guide plate 57 will guide the cut weeds around the rotating shaft 4, so as to avoid the problem that the cut weeds accumulate between the rotating shaft 4 and the stepping motor main body 1 and form a blockage.

[0025] During use, the motor magnetic sheet 3 is attached to the surface of the stepper motor body 1. The motor magnetic sheet 3 can provide a certain magnetic shielding effect, reduce the interference of the external magnetic field on the operation of the motor, and enhance the magnetic interference resistance of the motor. When the stepper motor body 1 is used on a lawn mower for mowing, weeds will wrap around the stepper motor body 1 and the rotating shaft 4, which will cause the rotating shaft 4 to be unable to rotate freely or the rotation to be blocked, thus affecting the normal operation of the stepper motor and making it unable to perform tasks according to the predetermined accuracy and speed. Therefore, the rotation of the rotating shaft 4 will drive the hollow frame 51 to rotate, the rotation of the hollow frame 51 will drive the connecting column 52 to rotate, and the rotation of the connecting column 52 will drive the double-headed cutting knife 53 to rotate. The double-headed cutting knife 53 will cut the weeds wrapped around the stepper motor body 1 and the rotating shaft 4, thus avoiding the problem that the weeds wrap around the stepper motor body 1 and the rotating shaft 4, causing the rotating shaft 4 to be unable to rotate freely or the rotation to be blocked, affecting the normal operation of the stepper motor. When the connecting column 52 rotates following the hollow frame 51, the connecting column 52 will drive the L-shaped rod 54 to rotate, the rotation of the L-shaped rod 54 will drive the fixed block 55 to rotate, the rotation of the fixed block 55 will drive the connecting rod 56 to rotate, the rotation of the connecting rod 56 will drive the guide plate 57 to rotate, and the rotation of the guide plate 57 will drive the elastic plate 59 to rotate. When the elastic plate 59 touches the arc surface of the abutting block 510, it will displace and deform. The displacement of the elastic plate 59 will drive the connecting rod 56 to rotate along the side surface of the fixed block 55 through the guide plate 57. The rotation of the guide plate 57 will cause the torsion spring to deform. When the elastic plate 59 no longer moves on the arc surface of the abutting block 510, the torsion spring will reset the guide plate 57, the connecting rod 56 and the elastic plate 59 through its own elastic force, and so on, so that the guide plate 57 swings back and forth. The reciprocating movement of the guide plate 57 will guide the cut weeds around the rotating shaft 4, thus avoiding the problem that the cut weeds accumulate between the rotating shaft 4 and the stepper motor body 1 and form a blockage. The back-and-forth swing of the guide plate 57 will drive the triangular plate 58 to swing back and forth, so that the cut weeds can be more evenly distributed to each area around the rotating shaft 4 instead of concentrating in a certain part. This not only avoids blockage but also keeps the cutting area clean, makes the cutting process smoother, and enables the motor to continue to operate efficiently.

[0026] Please refer to Figure 1 - Figure 7, on the basis of the above embodiments, in another embodiment of the present invention, an anti-adhesion device 6 is provided on the side of the stepping motor main body 1. The anti-adhesion device 6 includes an orbital ring 61. The inner wall of the orbital ring 61 is slidably connected with a slider 62. A long rod 63 is fixedly connected to the side of the slider 62. One end of the long rod 63 away from the slider 62 is fixedly connected with a connecting ring 64. A limiting block 65 is slidably installed on the outer wall of the long rod 63. A first spring is provided between the limiting block 65 and the connecting ring 64. A fixing column 66 is fixedly connected to the bottom of the limiting block 65. A scraping block 67 is fixedly connected to the bottom of the fixing column 66. A U-shaped block 68 is fixedly connected to the side of the stepping motor main body 1. The U-shaped block 68 is located on the displacement track of the fixing column 66. The bottom of the scraping block 67 is slidably connected to the top of the double-headed cutting knife 53. Through the setting of the above structure, the limiting block 65 moves back and forth. The back-and-forth movement of the limiting block 65 will cause the scraping block 67 to move back and forth on the surface of the double-headed cutting knife 53 through the fixing column 66, thereby pushing away the weeds adhering to the surface of the double-headed cutting knife 53 and avoiding the weeds from affecting the cutting efficiency of the double-headed cutting knife 53.

[0027] An L-shaped plate 69 is fixedly connected to the top of the stepping motor main body 1. A support ring 610 is fixedly connected to the lower part of the inner wall of the L-shaped plate 69. A number of spherical blocks 611 are fixedly connected to the inner wall of the support ring 610. A U-shaped plate 612 is fixedly connected to the side of the hollow frame 51. A long cross bar 613 penetrates and slides on the circumferential surface of the fixing column 66. A moving arc plate 614 is fixedly connected to the outer wall of the long cross bar 613. A knocking rod 615 is fixedly connected to the side of the moving arc plate 614. A second spring is provided between the moving arc plate 614 and the knocking rod 615. One end of the long cross bar 613 away from the moving arc plate 614 is arc-shaped. The number of spherical blocks 611 is located on the displacement track of the arc-shaped end of the long cross bar 613. The scraping block 67 is located on the displacement track of the knocking rod 615. Through the setting of the above structure, the moving arc plate 614 compresses the second spring. When the rotation of the long cross bar 613 does not touch the spherical block 611, the second spring will reset by its own elastic force. The reset of the second spring drives the moving arc plate 614 and the knocking rod 615 to reset. The reset of the knocking rod 615 will knock on the scraping block 67, thereby avoiding the problem that weeds remain on the surface of the scraping block 67 after the scraping block 67 has pushed away the weeds.

[0028] During use, the rotation of the double-headed cutting knife 53 drives the scraping block 67 to rotate. The rotation of the scraping block 67 drives the fixed column 66 to rotate. The rotation of the fixed column 66 touches the surface of the U-shaped block 68, so that the fixed column 66 drives the scraping block 67 and the limiting block 65 to move on the surface of the double-headed cutting knife 53 and the outer wall of the long rod 63 respectively. The movement of the limiting block 65 compresses the first spring. When the fixed column 66 rotates away from touching the surface of the U-shaped block 68, the first spring will reset through its own elastic force. The reset of the first spring drives the limiting block 65 to reset. This process repeats, causing the limiting block 65 to move back and forth. The back-and-forth movement of the limiting block 65 causes the scraping block 67 to move back and forth on the surface of the double-headed cutting knife 53 through the fixed column 66, thereby pushing away the weeds adhering to the surface of the double-headed cutting knife 53 and preventing the weeds from affecting the cutting efficiency of the double-headed cutting knife 53. The rotation of the fixed column 66 drives the long cross bar 613 to rotate. The rotation of the long cross bar 613 touches the ball block 611, so that the long cross bar 613 moves away from the support ring 610. The movement of the long cross bar 613 drives the moving arc plate 614 to move. The movement of the moving arc plate 614 drives the knocking rod 615 away from the scraping block 67 and compresses the second spring. When the rotation of the long cross bar 613 no longer touches the ball block 611, the second spring will reset through its own elastic force. The reset of the second spring drives the moving arc plate 614 and the knocking rod 615 to reset. The reset of the knocking rod 615 knocks on the scraping block 67, thereby avoiding the problem that weeds remain on the surface of the scraping block 67 after the scraping block 67 has pushed away the weeds.

[0029] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A stepper motor with an anti-magnetic interference device, comprising a stepper motor main body (1), a connector (2) fixedly connected to the top of the stepper motor main body (1), a motor magnetic patch (3) fixedly connected to the top of the stepper motor main body (1), and a rotating shaft (4) fixedly connected to the output end of the stepper motor main body (1), characterized in that: The outer wall of the rotating shaft (4) is provided with an anti-winding device (5), and the anti-winding device (5) comprises a hollow frame (51), the inner wall of the hollow frame (51) is fixedly connected to the outer wall of the rotating shaft (4), the side of the hollow frame (51) is fixedly connected to a connecting column (52), and the outer wall of the connecting column (52) is fixedly connected to a double-headed cutting knife (53).

2. The stepping motor with an anti-magnetic interference device according to claim 1, characterized in that: The end of the connecting column (52) away from the hollow frame (51) is fixedly connected to an L-shaped rod (54), the end of the L-shaped rod (54) away from the connecting column (52) is fixedly connected to a fixed block (55), the side of the fixed block (55) is rotatably connected to a connecting rod (56), the end of the connecting rod (56) away from the fixed block (55) is fixedly connected to a guide plate (57), a torsion spring is provided between the guide plate (57) and the fixed block (55), the side of the guide plate (57) is fixedly connected to an elastic plate (59), and the side of the stepping motor body (1) is fixedly connected to a resistance block (510).

3. The stepping motor with an anti-magnetic interference device according to claim 2, characterized in that: A plurality of triangular plates (58) are fixedly connected to the side surface of the guide plate (57).

4. A stepper motor with an anti-magnetic interference device according to claim 2, characterized in that: One side of the resistance block (510) is arranged in an arc shape, and the arc-shaped side of the resistance block (510) is located on the displacement track of the elastic plate (59).

5. A stepping motor with an anti-magnetic interference device according to claim 1, characterized in that: The side of the stepper motor body (1) is provided with an anti-adhesion device (6), and the anti-adhesion device (6) comprises a track ring (61), the inner wall of the track ring (61) is slidably connected to a slider (62), the side of the slider (62) is fixedly connected to a long rod (63), the end of the long rod (63) away from the slider (62) is fixedly connected to a connecting ring (64), the outer wall of the long rod (63) is slidably mounted with a limit block (65), a spring is provided between the limit block (65) and the connecting ring (64), the bottom of the limit block (65) is fixedly connected to a fixed column (66), the bottom of the fixed column (66) is fixedly connected to a scraper block (67), and the side of the stepper motor body (1) is fixedly connected to a U-shaped block (68).

6. The stepping motor with an anti-magnetic interference device according to claim 5, characterized in that: An L-shaped plate (69) is fixedly connected to the top of the stepper motor body (1), a support ring (610) is fixedly connected to the lower inner wall of the L-shaped plate (69), a plurality of ball blocks (611) are fixedly connected to the inner wall of the support ring (610), a U-shaped plate (612) is fixedly connected to the side of the hollow frame (51), a long cross bar (613) passes through and slides on the circumferential surface of the fixed column (66), a movable arc plate (614) is fixedly connected to the outer wall of the long cross bar (613), a knocking rod (615) is fixedly connected to the side of the movable arc plate (614), and a second spring is arranged between the movable arc plate (614) and the knocking rod (615).

7. A stepper motor with an anti-magnetic interference device according to claim 5, characterized in that: The U-shaped block (68) is located on the displacement track of the fixed column (66), and the bottom of the scraping block (67) is slidably connected to the top of the double-headed cutting knife (53).

8. The stepping motor with an anti-magnetic interference device according to claim 6, wherein: One end of the long cross bar (613) away from the moving arc plate (614) is arc-shaped, a plurality of the ball blocks (611) are located on the displacement track of the arc-shaped end of the long cross bar (613), and the scraping block (67) is located on the displacement track of the knocking rod (615).

Images