A low-noise pneumatic vacuum stepper motor

Abstract

The invention relates to the field of motor technology and discloses a low-noise pneumatic vacuum stepper motor, which solves the problem that when the mounting surface between a frame and a motor is uneven, or when the mounting holes of the frame and the motor deviate, the frame or the motor needs to be repaired and corrected. The motor comprises a stepper motor body and a mounting ring, the output shaft of the stepper motor body passes through the mounting ring, the mounting ring is provided with a plug-in mechanism matched with the stepper motor body, the outer sleeve of the mounting ring is provided with a movable ring, the top and bottom of the mounting ring are fixedly connected with a rotating shaft; one end of the rotating shaft away from the mounting ring is rotatably connected with a movable seat, the movable seat and the movable ring are fixedly connected, the outer sleeve of the movable ring is provided with a fixed ring, and the movable ring is provided with an axial limit unit matched with the fixed ring; there is no need to repair and correct the stepper motor body and the frame, so installation is convenient, and the application range of the installation is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of motors, and in particular relates to a low-noise pneumatic vacuum stepping motor. Background Art

[0002] A stepper motor is an electric motor that converts an electrical pulse signal into a corresponding angular displacement or linear displacement. Each time a pulse signal is input, the rotor rotates an angle or moves forward one step. The output angular displacement or linear displacement is proportional to the number of input pulses, and the speed is proportional to the pulse frequency. A low-noise pneumatic vacuum stepper motor is a specially designed motor designed to reduce noise and provide stepping motion in a vacuum environment.

[0003] However, it is worth considering that when installing the stepper motor on the frame, the output shaft of the stepper motor needs to be consistent with the axis of the driven shaft. When the mounting surface between the frame and the motor is uneven, or there is a deviation between the mounting holes of the frame and the motor, the frame or the motor needs to be repaired and corrected. The installation precision of the components is high, there are certain limitations, and it is not convenient for promotion and use.

[0004] Therefore, in order to solve the above problems, a related facility that better meets the usage requirements is needed. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a low-noise pneumatic vacuum stepper motor, which effectively solves the problem in the above background technology that when the mounting surface between the frame and the motor is uneven, or there is a deviation between the mounting holes of the frame and the motor, the frame or the motor needs to be repaired and corrected.

[0006] To achieve the above object, the present invention provides the following technical solution: a low-noise pneumatic vacuum stepper motor, comprising a stepper motor body and a mounting ring, wherein the output shaft of the stepper motor body passes through the mounting ring, the mounting ring is equipped with a plug-in mechanism adapted to the stepper motor body, a moving ring is sleeved on the outside of the mounting ring, and the top and bottom of the mounting ring are fixedly connected with a rotating shaft;

[0007] The end of the rotating shaft away from the mounting ring is rotatably connected to a movable seat, the movable seat and the movable ring are fixedly connected, a fixed ring is sleeved on the outside of the movable ring, the movable ring is equipped with an axial limiting unit adapted to the fixed ring, and the movable ring is equipped with a pressing positioning structure adapted to the rotating shaft and the fixed ring respectively.

[0008] Preferably, the pressing and positioning structure includes a pressing ring arranged on the side of the mounting ring facing the stepper motor body, a first movable frame is provided above and below the mounting ring, and the first movable frame is in contact with the pressing ring, a first sliding groove is provided on the movable seat, a first slide plate is slidably provided in the first sliding groove, one end of the first movable frame is fixedly connected to the corresponding first slide plate, the other end of the first movable frame is fixedly connected to an arc plate, and the arc plate is in contact with the corresponding rotating shaft, a plurality of second movable frames are provided on the side of the fixed ring facing the pressing ring, the second movable frames are fixedly installed with a first pressing plate in contact with the fixed ring, and the movable ring is installed with elastic support components respectively adapted to the pressing ring and the plurality of second movable frames.

[0009] Preferably, the elastic support assembly includes a plurality of control shells fixedly mounted on the movable ring, a first movable plate is slidably provided in the control shell, two sides of the first movable plate are respectively in contact with two side inner walls of the control shell, a first guide column passes through the first movable plate, two ends of the first guide column are fixedly connected to the inner wall of the control shell, the first movable plate and the inner wall of the control shell are connected by a first tension spring, each second movable frame is respectively fixedly connected to a corresponding first movable plate, and at least two first movable plates that are not fixedly connected to the second movable frame are fixedly connected to the pressing ring, and the control shell is installed with a locking mechanism for locking the first movable plate.

[0010] Preferably, the axial limiting unit includes a plurality of second slides fixedly mounted on the outer wall of the movable ring, an annular groove is provided on the inner wall of the fixed ring, one end of the second slide away from the movable ring is located in the annular groove, and both sides of the second slide are respectively in contact with the inner walls of the annular groove.

[0011] Preferably, the locking mechanism includes a support plate arranged on the side of the control shell away from the movable ring, and at least one second pressing plate is fixedly connected to the side of the support plate facing the control shell, and the second pressing plate is in contact with the corresponding first movable plate, a screw rod passes through the support plate, the screw rod is fixedly connected to the control shell, a nut is sleeved on the outside of the screw rod, and the side of the support plate away from the control shell is in contact with the nut.

[0012] Preferably, a positioning ring is provided on the side of the pressing ring away from the moving ring, a plurality of first positioning holes matching with nuts are opened on the positioning ring, and the nuts are located in the corresponding first positioning holes, and the moving ring is equipped with a reset unit matching with the positioning ring.

[0013] Preferably, the reset unit includes at least two second guide columns fixedly mounted on the movable ring, the second guide columns pass through the positioning ring, a second tension spring is sleeved on the outside of the second guide columns, and both ends of the second tension spring are fixedly connected to the movable ring and the positioning ring respectively.

[0014] Preferably, a plurality of support parts are fixedly connected to the outer wall of the fixing ring, and mounting holes are provided on the support parts.

[0015] Preferably, the plug-in mechanism includes two plug-in plates fixedly mounted on the stepper motor body, two plug-in holes matched with the plug-in plates are provided on the mounting ring, the plug-in plates pass through the corresponding plug-in holes, a second positioning hole is provided on the plug-in plate, a positioning block is slidably provided in the second positioning hole, a through hole is provided on the inner wall of the plug-in hole, the ends of the two positioning blocks away from each other respectively pass through the corresponding through holes, second movable plates are symmetrically provided on both sides of the mounting ring, and the positioning blocks are fixedly connected to the corresponding second movable plates, and the mounting ring is equipped with an elastic device matching the second movable plate.

[0016] Preferably, the elastic device includes two sliders fixedly mounted on the second movable plate on the side facing the mounting ring, two second sliding grooves are provided on both sides of the mounting ring, the sliders are located in the corresponding second sliding grooves, and the sliders and the inner walls of the second sliding grooves are connected by a third tension spring.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The staff drives the mounting ring and the rotating shaft to rotate relative to the movable seat and the moving ring to change the inclination angle of the mounting ring, and then drives the mounting ring and the moving ring to move in the vertical direction relative to the fixed ring, and the staff drives the mounting ring and the moving ring to rotate as a whole to change the initial position of the mounting ring, and presses and positions the rotating shaft and the fixed ring through the pressing and positioning structure, and the fixed ring and the rotating shaft are fixed relative to the moving ring so that the mounting ring, the moving ring, the fixed ring and the frame are relatively fixed as a whole, completing the adjustment of the initial position of the mounting ring, and the staff installs the stepper motor body on the mounting ring through the plug-in mechanism, and the output shaft of the stepper motor body passes through the mounting ring. Since the initial position of the mounting ring is corrected, the output shaft of the stepper motor body can be made consistent with the axial center line of the shaft to be driven, and there is no need to repair and correct the stepper motor body and the frame, which is convenient for installation and improves the scope of application of the installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0020] In the attached picture:

[0021] Figure 1 This is one of the overall structural schematic diagrams of the present invention;

[0022] Figure 2 This is the second schematic diagram of the overall structure of the present invention;

[0023] Figure 3 for Figure 1A schematic diagram of the local enlarged structure at point A in the middle;

[0024] Figure 4 It is a structural schematic diagram of the mobile ring of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the pressing ring of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the cross section of the control shell of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the fixing ring of the present invention;

[0028] Figure 8 It is a structural schematic diagram of the plug-in mechanism of the present invention;

[0029] Fig. 9 This is a schematic diagram of the structure of the installation ring, the plug plate and the positioning block separated according to the present invention.

[0030] In the figure: 1, stepper motor body; 2, mounting ring; 3, moving ring; 4, fixed ring; 5, rotating shaft; 6, movable seat; 7, first movable frame; 8, arc plate; 9, first slide groove; 10, first slide plate; 11, pressing ring; 12, second slide plate; 13, annular groove; 14, second movable frame; 15, first pressing plate; 16, control shell; 17, first movable plate; 18, first guide column; 19, first tension spring; 20, screw rod; 21, support plate; 22, second pressing plate; 23, nut; 24, positioning ring; 25, first positioning hole; 26, second guide column; 27, second tension spring; 30, plug plate; 31, plug hole; 32, second positioning hole; 33, through hole; 34, second movable plate; 35, positioning block; 36, slider; 37, second slide groove; 38, third tension spring; 39, support part; 40, mounting hole. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] Embodiment 1, by Figure 1 and Figure 2 The present invention comprises a stepper motor body 1 and a mounting ring 2, wherein the output shaft of the stepper motor body 1 passes through the mounting ring 2, the mounting ring 2 is provided with a plug-in mechanism adapted to the stepper motor body 1, a moving ring 3 is sleeved on the outside of the mounting ring 2, and a rotating shaft 5 is fixedly connected to the top and bottom of the mounting ring 2;

[0033] The end of the rotating shaft 5 away from the mounting ring 2 is rotatably connected with a movable seat 6, the movable seat 6 and the moving ring 3 are fixedly connected, the outer sleeve of the moving ring 3 is provided with a fixed ring 4, the moving ring 3 is equipped with an axial limiting unit adapted to the fixed ring 4, and the moving ring 3 is equipped with a pressing and positioning structure adapted to the rotating shaft 5 and the fixed ring 4 respectively; the staff drives the mounting ring 2 and the rotating shaft 5 to rotate relative to the movable seat 6 and the moving ring 3 to change the inclination angle of the mounting ring 2, and then the staff drives the mounting ring 2 and the moving ring 3 to move in the vertical direction relative to the fixed ring 4, and the staff drives the mounting ring 2 and the moving ring 3 to rotate as a whole to change the initial position of the mounting ring 2, The pressing and positioning structure presses and positions the rotating shaft 5 and the fixed ring 4. The fixed ring 4 and the rotating shaft 5 are fixed relative to the movable ring 3, so that the mounting ring 2, the movable ring 3, the fixed ring 4 and the frame are relatively fixed as a whole, and the initial position adjustment of the mounting ring 2 is completed. The staff installs the stepper motor body 1 on the mounting ring 2 through the plug-in mechanism. The output shaft of the stepper motor body 1 passes through the mounting ring 2. Since the initial position correction of the mounting ring 2 is completed, the output shaft of the stepper motor body 1 can be made consistent with the axis center line of the shaft to be driven. There is no need to repair and correct the stepper motor body 1 and the frame, which is convenient for installation and improves the application range of the installation.

[0034] Embodiment 2, based on embodiment 1, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8It is given that the pressing and positioning structure includes a pressing ring 11 arranged on the side of the mounting ring 2 facing the stepper motor body 1, a first movable frame 7 is arranged above and below the mounting ring 2, and the first movable frame 7 is in contact with the pressing ring 11, a first slide groove 9 is opened on the movable seat 6, a first slide plate 10 is slidably arranged in the first slide groove 9, one end of the first movable frame 7 is fixedly connected to the corresponding first slide plate 10, the other end of the first movable frame 7 is fixedly connected to an arc plate 8, and the arc plate 8 is in contact with the corresponding rotating shaft 5, a plurality of second movable frames 14 are arranged on the side of the fixed ring 4 facing the pressing ring 11, the second movable frame 14 is fixedly installed with a first pressing plate 15 in contact with the fixed ring 4, and the movable ring 3 is installed with the pressing rings 14 and the pressing plates 15 are respectively in contact with the pressing rings 14. 11 and a plurality of second movable frames 14 are adapted to an elastic support assembly, the elastic support assembly includes a plurality of control shells 16 fixedly mounted on the movable ring 3, a first movable plate 17 is slidably arranged in the control shell 16, both sides of the first movable plate 17 are respectively in contact with the inner walls of the control shell 16 on both sides, a first guide column 18 is passed through the first movable plate 17, both ends of the first guide column 18 are fixedly connected to the inner wall of the control shell 16, the first movable plate 17 and the inner wall of the control shell 16 are connected by a first tension spring 19, each second movable frame 14 is respectively fixedly connected to a corresponding first movable plate 17, and at least two first movable plates 17 that are not fixedly connected to the second movable frame 14 are fixedly connected to the pressing ring 11 The control housing 16 is provided with a locking mechanism for locking the first movable plate 17. The axial limiting unit includes a plurality of second slide plates 12 fixedly mounted on the outer wall of the movable ring 3. An annular groove 13 is provided on the inner wall of the fixed ring 4. The end of the second slide plate 12 away from the movable ring 3 is located in the annular groove 13, and the two sides of the second slide plate 12 are respectively in contact with the inner walls of the two sides of the annular groove 13. The locking mechanism includes a support plate 21 provided on the side of the control housing 16 away from the movable ring 3. The support plate 21 is fixedly connected with at least one second pressing plate 22 on the side facing the control housing 16, and the second pressing plate 22 is in contact with the corresponding first movable plate 17. A screw rod 20 is passed through the support plate 21, and the screw rod 20 and the control housing 1 6 is fixedly connected, a nut 23 is sleeved on the outside of the screw rod 20, and the side of the support plate 21 away from the control housing 16 is in contact with the nut 23, a positioning ring 24 is provided on the side of the pressing ring 11 away from the moving ring 3, a plurality of first positioning holes 25 adapted to the nuts 23 are opened on the positioning ring 24, and the nuts 23 are located in the corresponding first positioning holes 25, and the moving ring 3 is equipped with a reset unit matched with the positioning ring 24, and the reset unit includes at least two second guide columns 26 fixedly installed on the moving ring 3, the second guide columns 26 penetrate the positioning ring 24, and the second guide columns 26 are sleeved on the outside with a second tension spring 27, and the two ends of the second tension spring 27 are respectively fixedly connected to the moving ring 3 and the positioning ring 24;

[0035] The first tension spring 19 is initially in a tensioned state, and the first tension spring 19 applies tension to the first movable plate 17, so that the first movable plates 17 apply tension to the pressing ring 11 and the second movable frame 14 respectively, and the second movable frame 14 applies pressure to the fixed ring 4 through the first pressing plate 15, so that the fixed ring 4 is preliminarily fixed relative to the movable ring 3, and the pressing ring 11 applies pressure to the first movable frame 7 and the arc plate 8, and the arc plate 8 presses the rotating shaft 5, so that the mounting ring 2 and the rotating shaft 5 are preliminarily fixed relative to the movable seat 6 and the movable ring 3, and the rotating shaft 5 and the fixed ring 4 are respectively The movable ring 3 is initially fixed. Due to the tension applied by each first tension spring 19, when the staff drives the movable ring 3 to move vertically relative to the fixed ring 4, the movable ring 3 drives the second slide plate 12 to slide in the annular groove 13, and the mounting ring 2 and the rotating shaft 5 are fixed relative to the movable seat 6 and the movable ring 3. Conversely, when the staff drives the mounting ring 2 and the rotating shaft 5 to rotate relative to the movable seat 6 and the movable ring 3, the movable ring 3 is fixed relative to the fixed ring 4. When it is necessary to position and lock the positions of the rotating shaft 5 and the fixed ring 4, the staff drives the positioning ring 24 to move in the direction away from the movable ring 3. The positioning ring 24 slides relative to the second guide column 26, the second tension spring 27 is in a tensioned state, and the nut 23 is disengaged from the first positioning hole 25, releasing the limitation on the position of the nut 23. The staff drives the nut 23 to rotate by using a wrench, and the nut 23 rotates outside the screw rod 20. The nut 23 pushes the support plate 21 and the second pressing plate 22 to move toward the first movable plate 17. Finally, the second pressing plate 22 presses the first movable plate 17. When the pressure on the first movable plate 17 is at a preset value, the nut 23 stops rotating. Similarly, the staff drives other nuts 2 3 is rotated to a preset position. When the position of the nut 23 is adjusted, the staff loosens the positioning ring 24, and the second tension spring 27 drives the positioning ring 24 to move, so that the nut 23 is inserted into the corresponding first positioning hole 25, so that the position of the nut 23 can be limited to prevent the nut 23 from loosening. The forces applied by the first movable plates 17 to the pressing ring 11 or the second movable frame 14 reach a preset value, so that the rotating shaft 5 and the fixed ring 4 are fixedly locked relative to the movable ring 3. Since the fixed ring 4 is fixed relative to the frame, the mounting ring 2 and the movable ring 3 can be fixed relative to the frame.

[0036] Embodiment 3, based on embodiment 1, Figure 2 , Figure 7 , Figure 8 and Fig. 9The outer wall of the fixing ring 4 is fixedly connected with a plurality of supporting parts 39, and the supporting parts 39 are provided with mounting holes 40. The plug-in mechanism includes two plug-in plates 30 fixedly mounted on the stepper motor body 1, and the mounting ring 2 is provided with two plug-in holes 31 adapted to the plug-in plates 30. The plug-in plates 30 penetrate the corresponding plug-in holes 31. The plug-in plates 30 are provided with a second positioning hole 32, and a positioning block 35 is slidably provided in the second positioning hole 32. A through hole 33 is provided on the inner wall of the plug-in hole 31, and the ends of the two positioning blocks 35 that are far away from each other penetrate the plug-in holes 31 and the plug-in holes 33 and the plug-in holes 33 are provided with a through hole 33. Corresponding through holes 33, second movable plates 34 are symmetrically arranged on both sides of the mounting ring 2, and the positioning blocks 35 are fixedly connected to the corresponding second movable plates 34, and the mounting ring 2 is equipped with an elastic device matched with the second movable plate 34, and the elastic device includes two sliders 36 fixedly installed on the second movable plate 34 facing the side of the mounting ring 2, and two second slide grooves 37 are provided on both sides of the mounting ring 2, and the sliders 36 are located in the corresponding second slide grooves 37, and the sliders 36 and the inner walls of the second slide grooves 37 are connected by third tension springs 38;

[0037] The support portion 39 and the fixing ring 4 are fixedly installed on the designated frame by means of the cooperation of the mounting hole 40 and the external bolts. The staff drives the two adjacent second movable plates 34 to move away from each other so that the ends of the two positioning blocks 35 that are away from each other slide from the insertion hole 31 to the through hole 33. The positioning block 35 no longer hinders the insertion plate 30 from sliding into the insertion hole 31, and the second movable plate 34 drives the slider 36 to slide relative to the second slide groove 37. The third tension spring 38 is in a tensioned state. Then another staff drives the stepper motor body 1 and the insertion plate 30 to move so that the insertion plate 30 is inserted into the corresponding insertion hole 31, and the second positioning hole 32 moves to one side of the positioning block 35. The first staff releases the second movable plate 34, and the third tension spring 38 drives the slider 36 and the second movable plate 34 to move. The second movable plate 34 drives the end of the positioning block 35 to be inserted into the second positioning hole 32, so that the stepper motor body 1 and the insertion plate 30 can be fixed relative to the mounting ring 2, and the installation of the stepper motor body 1 is completed.

[0038] Working principle: The fixed ring 4 is fixedly installed on the designated frame, the staff drives the installation ring 2 and the rotating shaft 5 to rotate relative to the movable seat 6 and the moving ring 3 to change the inclination angle of the installation ring 2, and then the staff drives the installation ring 2 and the moving ring 3 to move vertically relative to the fixed ring 4, and the staff drives the installation ring 2 and the moving ring 3 to rotate as a whole to change the initial position of the installation ring 2, and the moving ring 3 limits the position of the fixed ring 4 through the axial limiting unit to prevent the fixed ring 4 from shaking left and right relative to the output shaft of the stepper motor body 1, and then presses the rotating shaft 5 and the fixed ring 4 by the positioning structure. Press to position, the fixed ring 4 and the rotating shaft 5 are fixed relative to the moving ring 3, so that the mounting ring 2, the moving ring 3, the fixed ring 4 and the frame are relatively fixed as a whole, and the initial position adjustment of the mounting ring 2 is completed. The staff installs the stepper motor body 1 on the mounting ring 2 through the plug-in mechanism, and the output shaft of the stepper motor body 1 passes through the mounting ring 2. Since the initial position correction of the mounting ring 2 is completed, the output shaft of the stepper motor body 1 can be made consistent with the axis center line of the drive shaft, and the stepper motor body 1 and the frame do not need to be repaired and corrected, which is convenient for installation and improves the application range of the installation;

[0039] The first tension spring 19 is initially in a tensioned state, and the first tension spring 19 applies tension to the first movable plate 17, so that the first movable plates 17 apply tension to the pressing ring 11 and the second movable frame 14 respectively, and the second movable frame 14 applies pressure to the fixed ring 4 through the first pressing plate 15, so that the fixed ring 4 is preliminarily fixed relative to the movable ring 3, and the pressing ring 11 applies pressure to the first movable frame 7 and the arc plate 8, and the arc plate 8 presses the rotating shaft 5, so that the mounting ring 2 and the rotating shaft 5 are preliminarily fixed relative to the movable seat 6 and the movable ring 3, and the rotating shaft 5 and the fixed ring 4 are respectively The movable ring 3 is initially fixed. Due to the tension applied by each first tension spring 19, when the staff drives the movable ring 3 to move vertically relative to the fixed ring 4, the movable ring 3 drives the second slide plate 12 to slide in the annular groove 13, and the mounting ring 2 and the rotating shaft 5 are fixed relative to the movable seat 6 and the movable ring 3. Conversely, when the staff drives the mounting ring 2 and the rotating shaft 5 to rotate relative to the movable seat 6 and the movable ring 3, the movable ring 3 is fixed relative to the fixed ring 4. When it is necessary to position and lock the positions of the rotating shaft 5 and the fixed ring 4, the staff drives the positioning ring 24 to move in the direction away from the movable ring 3. The positioning ring 24 slides relative to the second guide column 26, the second tension spring 27 is in a tensioned state, and the nut 23 is disengaged from the first positioning hole 25, releasing the limitation on the position of the nut 23. The staff drives the nut 23 to rotate by using a wrench, and the nut 23 rotates outside the screw rod 20. The nut 23 pushes the support plate 21 and the second pressing plate 22 to move toward the first movable plate 17. Finally, the second pressing plate 22 presses the first movable plate 17. When the pressure on the first movable plate 17 is at a preset value, the nut 23 stops rotating. Similarly, the staff drives other nuts 2 3 is rotated to a preset position. When the position of the nut 23 is adjusted, the staff loosens the positioning ring 24, and the second tension spring 27 drives the positioning ring 24 to move, so that the nut 23 is inserted into the corresponding first positioning hole 25, so that the position of the nut 23 can be limited to prevent the nut 23 from loosening. The forces applied by the first movable plates 17 to the pressing ring 11 or the second movable frame 14 reach a preset value, so that the rotating shaft 5 and the fixing ring 4 are fixedly locked relative to the moving ring 3. Since the fixing ring 4 is fixed relative to the frame, the mounting ring 2 and the moving ring 3 can be fixed relative to the frame;

[0040] The support portion 39 and the fixing ring 4 are fixedly installed on the designated frame by means of the cooperation of the mounting hole 40 and the external bolts. The staff drives the two adjacent second movable plates 34 to move away from each other so that the ends of the two positioning blocks 35 that are away from each other slide from the insertion hole 31 to the through hole 33. The positioning block 35 no longer hinders the insertion plate 30 from sliding into the insertion hole 31, and the second movable plate 34 drives the slider 36 to slide relative to the second slide groove 37. The third tension spring 38 is in a tensioned state. Then another staff drives the stepper motor body 1 and the insertion plate 30 to move so that the insertion plate 30 is inserted into the corresponding insertion hole 31, and the second positioning hole 32 moves to one side of the positioning block 35. The first staff releases the second movable plate 34, and the third tension spring 38 drives the slider 36 and the second movable plate 34 to move. The second movable plate 34 drives the end of the positioning block 35 to be inserted into the second positioning hole 32, so that the stepper motor body 1 and the insertion plate 30 can be fixed relative to the mounting ring 2, and the installation of the stepper motor body 1 is completed.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A low-noise pneumatic vacuum stepper motor, comprising a stepper motor body (1) and a mounting ring (2), characterized in that: The output shaft of the stepper motor body (1) passes through the mounting ring (2), the mounting ring (2) is provided with a plug-in mechanism adapted to the stepper motor body (1), a movable ring (3) is sleeved on the outside of the mounting ring (2), and the top and bottom of the mounting ring (2) are fixedly connected with a rotating shaft (5); The end of the rotating shaft (5) away from the mounting ring (2) is rotatably connected to a movable seat (6), the movable seat (6) and the movable ring (3) are fixedly connected, the outer sleeve of the movable ring (3) is provided with a fixed ring (4), the movable ring (3) is equipped with an axial limit unit adapted to the fixed ring (4), and the movable ring (3) is equipped with a pressing positioning structure adapted to the rotating shaft (5) and the fixed ring (4), respectively. The pressing and positioning structure comprises a pressing ring (11) arranged on the side of the mounting ring (2) facing the stepper motor body (1), a first movable frame (7) is arranged above and below the mounting ring (2), and the first movable frame (7) and the pressing ring (11) are in contact with each other, a first slide groove (9) is provided on the movable seat (6), a first slide plate (10) is slidably arranged in the first slide groove (9), one end of the first movable frame (7) is fixedly connected to the corresponding first slide plate (10), the other end of the first movable frame (7) is fixedly connected to an arc plate (8), and the arc plate (8) is in contact with the corresponding rotating shaft (5), a plurality of second movable frames (14) are arranged on the side of the fixed ring (4) facing the pressing ring (11), a first pressing plate (15) in contact with the fixed ring (4) is fixedly installed on the second movable frame (14), and an elastic support assembly respectively adapted to the pressing ring (11) and the plurality of second movable frames (14) is installed on the movable ring (3); The axial limiting unit comprises a plurality of second slide plates (12) fixedly mounted on the outer wall of the movable ring (3); an annular groove (13) is provided on the inner wall of the fixed ring (4); an end of the second slide plate (12) away from the movable ring (3) is located in the annular groove (13); and two sides of the second slide plate (12) are respectively in contact with two side inner walls of the annular groove (13).

2. A low-noise pneumatic vacuum stepper motor according to claim 1, characterized in that: The elastic support assembly comprises a plurality of control shells (16) fixedly mounted on the movable ring (3); a first movable plate (17) is slidably arranged in the control shell (16); two sides of the first movable plate (17) are respectively in contact with two side inner walls of the control shell (16); a first guide column (18) passes through the first movable plate (17); two ends of the first guide column (18) are fixedly connected to the inner wall of the control shell (16); the first movable plate (17) and the inner wall of the control shell (16) are connected via a first tension spring (19); each second movable frame (14) is respectively fixedly connected to a corresponding first movable plate (17); and at least two first movable plates (17) not fixedly connected to the second movable frame (14) are fixedly connected to the pressing ring (11); and the control shell (16) is provided with a locking mechanism for locking the first movable plate (17).

3. A low-noise pneumatic vacuum stepper motor according to claim 2, characterized in that: The locking mechanism comprises a support plate (21) arranged on a side of the control housing (16) away from the movable ring (3); at least one second pressing plate (22) is fixedly connected to the side of the support plate (21) facing the control housing (16), and the second pressing plate (22) is in contact with the corresponding first movable plate (17); a screw rod (20) passes through the support plate (21), the screw rod (20) is fixedly connected to the control housing (16), a nut (23) is sleeved on the outside of the screw rod (20), and the side of the support plate (21) away from the control housing (16) is in contact with the nut (23).

4. A low-noise pneumatic vacuum stepper motor according to claim 3, characterized in that: A positioning ring (24) is provided on the side of the pressing ring (11) away from the moving ring (3); a plurality of first positioning holes (25) matching the nuts (23) are provided on the positioning ring (24); the nuts (23) are located in the corresponding first positioning holes (25); and the moving ring (3) is provided with a reset unit matching the positioning ring (24).

5. A low-noise pneumatic vacuum stepper motor according to claim 4, characterized in that: The reset unit comprises at least two second guide columns (26) fixedly mounted on the moving ring (3), the second guide columns (26) passing through the positioning ring (24), a second tension spring (27) being sleeved on the outside of the second guide columns (26), and two ends of the second tension spring (27) being fixedly connected to the moving ring (3) and the positioning ring (24), respectively.

6. A low-noise pneumatic vacuum stepper motor according to claim 1, characterized in that: A plurality of support portions (39) are fixedly connected to the outer wall of the fixing ring (4), and mounting holes (40) are provided on the support portions (39).

7. A low-noise pneumatic vacuum stepper motor according to claim 1, characterized in that: The plug-in mechanism comprises two plug-in plates (30) fixedly mounted on the stepper motor body (1); two plug-in holes (31) matched with the plug-in plates (30) are provided on the mounting ring (2); the plug-in plates (30) penetrate the corresponding plug-in holes (31); a second positioning hole (32) is provided on the plug-in plate (30); a positioning block (35) is slidably provided in the second positioning hole (32); a through hole (33) is provided on the inner wall of the plug-in hole (31); the ends of the two positioning blocks (35) that are far away from each other respectively penetrate the corresponding through holes (33); second movable plates (34) are symmetrically provided on both sides of the mounting ring (2); the positioning blocks (35) and the corresponding second movable plates (34) are fixedly connected; and an elastic device matched with the second movable plates (34) is installed on the mounting ring (2).

8. A low-noise pneumatic vacuum stepper motor according to claim 7, characterized in that: The elastic device comprises two sliders (36) fixedly mounted on the second movable plate (34) on the side facing the mounting ring (2), two second slide grooves (37) are provided on both sides of the mounting ring (2), the sliders (36) are located in the corresponding second slide grooves (37), and the sliders (36) and the inner walls of the second slide grooves (37) are connected via a third tension spring (38).

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