CN114785031A

CN114785031A - Step motor with rotor rotation torque offset correction function

Info

Publication number: CN114785031A
Application number: CN202210553434.9A
Authority: CN
Inventors: 史俊杰; 李欢
Original assignee: Changzhou Nuoquan Electromechanical Co ltd
Current assignee: Changzhou Nuoquan Electromechanical Co ltd
Priority date: 2022-05-20
Filing date: 2022-05-20
Publication date: 2022-07-22

Abstract

The invention discloses a step motor with rotor rotation moment offset correction function, relating to the technical field of step motors and comprising: a motor body and a rotor shaft; the rotor shaft is arranged in the motor body; the motor body is arranged in the shell; a correction assembly is arranged on one side, close to the motor body, of the shell; the starting motor body, the rotor shaft begins to rotate thereupon, because the influence of rotor machining precision, the rotor takes place the off-centre at rotatory in-process, when the rotor drives the rotor shaft and rotates, the skew of certain degree can take place for the rotor shaft, the extrusion of rotor shaft axial correction subassembly, the correction subassembly receives the extrusion effect back of rotor shaft, the correction subassembly counteracts on the rotor shaft, the correction subassembly is revised the offset of rotor shaft, make the rotor shaft reset, avoid the skew to appear in the rotor shaft, reduce the wearing and tearing between rotor shaft and the casing, the noise that the rotor shaft rotated the in-process and produced has been reduced, the stability of motor operation has been improved.

Description

Step motor with rotor rotation torque offset correction function

Technical Field

The invention relates to the technical field of stepping motors, in particular to a stepping motor with a rotor rotation torque offset correction function.

Background

A stepper motor is an electric motor that converts electrical pulse signals into corresponding angular or linear displacements. When a pulse signal is input, the rotor rotates by an angle or moves one step, the output angular displacement or linear displacement is in direct proportion to the input pulse number, and the rotating speed is in direct proportion to the pulse frequency; it comprises a stator and a rotor; the magnetic pole teeth of the stator are wound with coils, and the rotor is provided with a permanent magnet; generally in a stepping motor, current flows through each coil; thereby, a rotating magnetic field is generated to rotationally drive the rotor at a predetermined step angle;

in prior art, because the production machining precision's of rotor influence, there is certain difference in the precision of rotor, the rotor can produce certain off-centre at rotatory in-process, and off-centre can lead to the rotor shaft skew to appear, and the skew appears in the rotor shaft and can increase wearing and tearing, produces the noise, causes certain influence to the motor operation.

Disclosure of Invention

The present invention has been made in an effort to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a stepping motor having a function of correcting a rotational moment offset of a rotor.

In order to solve the technical problems, the invention provides the following technical scheme:

a stepping motor having a rotor rotation torque offset correction function, comprising: a motor body and a rotor shaft; the rotor shaft is arranged in the motor body; the motor body is arranged in the shell; a correction assembly is arranged on one side, close to the motor body, of the shell; the correction assembly is used for correcting the offset in the rotating process of the rotor shaft; the rotor shaft sequentially penetrates through the correction assembly and the shell;

the starting motor body, the rotor shaft begins to rotate thereupon, because the influence of rotor machining precision, the rotor takes place the off-centre at rotatory in-process, when the rotor drives the rotor shaft and rotates, the skew of certain degree can take place for the rotor shaft, the extrusion of rotor shaft axial correction subassembly, the correction subassembly receives the extrusion effect back of rotor shaft, the correction subassembly counteracts on the rotor shaft, the correction subassembly is revised the offset of rotor shaft, make the rotor shaft reset, avoid the skew to appear in the rotor shaft, reduce the wearing and tearing between rotor shaft and the casing, the noise that the rotor shaft rotated the in-process and produced has been reduced, the stability of motor operation has been improved.

Preferably, the correction assembly comprises: the needle bearing inner ring is arranged on the rotor shaft; the outer ring of the needle bearing is provided with a rubber ring; the needle bearing is rotationally connected with the rubber ring; the rubber ring is connected with the side wall of the shell; a plurality of cavities are arranged in the rubber ring; a plurality of pairs of correcting rods are arranged in the cavity; a hinge mechanism is arranged in the cavity of the rubber ring; the two opposite correction rods are hinged through a hinge mechanism; a plurality of pairs of the correcting rods are spirally arranged along the axis of the rotor shaft; a pull rope is arranged on the correcting rod; the pull rope penetrates through the inner ring of the rubber ring to be connected with the wall of the outer ring of the needle bearing;

the rotor drives the rotor shaft to rotate, the rotor shaft drives the needle bearing inner ring to rotate, the needle roller inside the needle bearing is driven to rotate around the needle bearing inner ring in the rotation process of the needle bearing inner ring, when the rotor has an eccentric phenomenon, the rotor drives the rotor shaft to deviate, the needle bearing inner ring is extruded in the deviation process of the rotor shaft, the needle roller inside the needle bearing is extruded outwards when the needle bearing inner ring is extruded, the needle roller extrudes the outer ring of the needle bearing outwards in the rotation process, the outer ring extrudes the correcting rod inside the rubber ring along with the needle roller, the correcting rod extrudes the hinge mechanism, the hinge mechanism immediately pulls the correcting rod on the other side to move towards one side far away from the needle bearing, the pull rope is pulled in the movement process of the correcting rod, the correcting rod pulls the needle bearing outer ring to move through the pull rope, the needle bearing is reset, the needle bearing drives the rotor shaft to reset, and the rotor shaft is prevented from deviating, reduce the wearing and tearing between rotor shaft and the casing, reduced the noise that the rotor shaft rotated the in-process and produced, improved the stability of motor operation.

Preferably, the hinge mechanism includes: a first sliding rod and a second sliding rod; the correcting rod close to one side of the needle bearing is connected with a first sliding rod; a first slideway is arranged in the rubber ring; the first sliding rod is connected in the first sliding way in a sliding way; one end of the first sliding rod, which is far away from the correcting rod, is hinged with a first rotating rod; one end of the first rotating rod, which is far away from the first sliding rod, is hinged with a telescopic rod;

a correction rod close to the other side of the needle bearing is connected with a second sliding rod; a second slideway is arranged in the rubber ring; the second sliding rod is connected in the second sliding way in a sliding manner; one end of the second sliding rod, which is far away from the correcting rod, is hinged with a second rotating rod; a third sliding rod is hinged to one side, away from the second sliding rod, of the second rotating rod; one end of the third sliding rod, which is far away from the second rotating rod, is fixedly connected with a telescopic rod; a third slideway is arranged in the rubber ring; the third sliding rod is connected to the third slideway in a sliding manner;

the correcting rod is extruded outwards by the outer ring of the needle bearing, the correcting rod pushes the first sliding rod to slide on the first slide way, the first sliding rod moves towards one side far away from the needle bearing, the first sliding rod pushes the first rotating rod to rotate clockwise, the first rotating rod rotates to drive the telescopic rod to stretch, the third sliding rod is driven to slide on the third slide way in the stretching process of the telescopic rod, the third sliding rod moves towards one side far away from the second rotating rod, the second rotating rod is driven to rotate anticlockwise in the moving process of the third sliding rod, the second rotating rod rotates to drive the second sliding rod to move, the second sliding rod moves towards one side far away from the correcting rod along the second slide way, the second sliding rod slides to drive the opposite correcting rod to move, the correcting rod pulls the pull rope, the pull rope pulls the outer ring of the needle bearing to reset, and the needle bearing drives the rotor shaft to reset; the rotor shaft is positioned at the center of the axis, so that the rotor shaft is prevented from deviating, and the abrasion between the rotor shaft and the shell is reduced;

when the rotor shaft extrudees the correction rod in the opposite direction, the correction rod pushes the second slide bar to slide along the second slide way, the second slide bar drives the second rotating rod to rotate anticlockwise, the second rotating rod rotates to drive the third slide bar to move on the third slide way, the third slide bar pulls the telescopic rod, the telescopic rod drives the first rotating rod to rotate clockwise, the first rotating rod rotates to drive the first slide bar to slide on the first slide way, the first slide bar drives the opposite correction rod to move, and the correction rod is reset through the pull rope to pull the needle bearing.

Preferably, an access panel is arranged on one side of the shell, which is far away from the rubber ring, and the access panel is hinged with the bottom surface of the shell through a hinge rod; the bottom surface of the shell is provided with a slide way; a sliding plate is arranged on the slideway; a triangular clamping block is arranged at the bottom of the sliding plate; the sliding plate is connected with the slideway in a sliding manner through a pulley; a slideway extends from the side wall of the access panel;

when the motor body needs to be overhauled, a worker opens a lockset for connecting the overhaul panel and the shell to separate the overhaul panel from the shell, the overhaul panel rotates around the hinge rod to enable the overhaul panel and the bottom surface of the shell to be in a parallel state, and at the moment, the chute in the shell is communicated with the chute on the surface of the overhaul panel; the triangular clamping block at the bottom of the sliding plate is taken out by a worker, the sliding plate is pulled to move to one side close to the overhaul plate, the sliding plate slides to the surface of the overhaul plate through the sliding groove, the worker can overhaul the motor body immediately, the worker is prevented from dismounting the whole shell, and then the motor body is overhauled, so that the workload of the worker is reduced, and the overhaul efficiency of the motor body is improved; after motor body overhauls and accomplishes, the staff pushes motor body to inside the casing through the slide, and the rotor shaft passes needle bearing and casing, and the staff supports the pulley on the slide with the triangle fixture block afterwards, avoids the pulley not hard up to lead to motor body to appear damaging, is the vertical state with the access panel rotation to with the casing bottom surface at last, pins access panel and casing through the tool to lock.

Preferably, a cavity is arranged in the rubber ring, and the cavity is provided with an air inlet and an air outlet; one-way valves are arranged in the air inlet and the air outlet; the air inlet is communicated with the interior of the shell; the air outlet penetrates through the shell;

when the needle bearing is extruded to the outside by the deviation action of the rotor shaft to correct the rod, the rubber ring can be extruded to a certain degree, the rubber ring is extruded to deform the cavity, so that the pressure in the cavity is increased, gas in the cavity is sprayed out of the shell through the check valve in the gas outlet immediately, when the needle bearing is reset under the action of the correction assembly, the rubber ring loses the extrusion force of the rotor shaft, the gas pressure in the cavity is smaller than the external gas pressure, hot gas in the shell enters the cavity from the gas inlet through the check valve in the gas inlet, so that the cavity is restored, and when the rotor shaft drives the needle bearing to extrude the rubber ring again, the hot gas sucked in the cavity is sprayed out, so that the hot gas in the shell is discharged.

Preferably, the needle bearing outer ring is provided with micropores; lubricating oil is filled in a cavity in the rubber ring,

when the rubber ring is extruded, lubricating oil filled in the cavity permeates to the joint of the inner ring of the rubber ring and the outer ring of the needle bearing through the pull rope, the joint is filled with the lubricating oil, the filled lubricating oil meets the micropores formed in the outer ring of the needle bearing, and the lubricating oil flows into a rotating pair of the inner needle of the needle bearing and the inner ring of the needle bearing along the micropores, so that the rotating pair is lubricated, and the abrasion of the inner needle and the inner ring is reduced.

Preferably, the shell is filled with an acoustic board;

rotor shaft produces the rotation in the motor body, and mechanical rotation can produce certain vibration, and the noise that the vibration produced passes through the propagation of air, propagates to the casing, and the acoustical panel of packing in the casing weakens the sound wave of noise, realizes weakening of noise.

Preferably, the sound-absorbing plate is of a honeycomb structure;

because the honeycomb has a larger surface area, when noise sound waves contact the surface of the honeycomb, the noise sound waves enter holes of honeycomb metal through diffuse reflection, and the inside of the honeycomb vibrates through reflection to convert the sound waves into heat energy, so that the effect of weakening the noise is realized; meanwhile, the honeycomb core has good heat-conducting property, and can effectively and quickly conduct locally-generated high temperature.

Compared with the prior art, the invention has the following beneficial effects:

1. the outer ring extrudes the correction rod in the rubber ring, the correction rod extrudes the hinge mechanism, the hinge mechanism immediately pulls the correction rod on the other side to move towards one side far away from the needle bearing, the pull rope is pulled in the movement process of the correction rod, the correction rod pulls the outer ring of the needle bearing to move through the pull rope, the needle bearing is reset, the needle bearing resets and drives the rotor shaft to reset, the rotor shaft is prevented from being deviated, the abrasion between the rotor shaft and the shell is reduced, the noise generated in the rotation process of the rotor shaft is reduced, and the running stability of the motor is improved.

2. Needle bearing receives rotor shaft's skew effect when outwards extruding the correction pole, the rubber circle also can receive the extrusion of certain degree, the rubber circle receives the extrusion, make the cavity produce deformation, make the pressure increase in the cavity, spout from the gas outlet to the casing outside through the check valve in the gas outlet, reset under the effect of correction subassembly as needle bearing, make the rubber circle lose extruded effort, atmospheric pressure in the cavity is less than outside atmospheric pressure this moment, steam in the casing passes through the intraoral check valve of air inlet and gets into the cavity from the air inlet, make the cavity reconversion.

3. When the rubber ring is extruded, lubricating oil filled in the cavity permeates to the joint of the inner ring of the rubber ring and the outer ring of the needle bearing through the pull rope, the joint is filled with the lubricating oil, the filled lubricating oil meets the micropores formed in the outer ring of the needle bearing, and the lubricating oil flows into a rotating pair of the inner needle of the needle bearing and the inner ring of the needle bearing along the micropores, so that the rotating pair is lubricated, and the abrasion of the inner needle and the inner ring is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the present invention in a closed state;

FIG. 2 is a schematic view of the present invention in a service condition;

FIG. 3 is a cross-sectional view of the correction assembly;

FIG. 4 is a schematic view of the hinge mechanism and rubber ring;

FIG. 5 is a schematic view of the hinge mechanism;

FIG. 6 is a schematic view of the rotor axial right crush correction bar;

FIG. 7 is a schematic view showing a structure in which the rotor shaft presses the correcting lever leftward;

FIG. 8 is a schematic view of the bottom of the housing;

fig. 9 is a schematic view of the structure of the sound-absorbing panel.

In the figure: 1. a motor body; 11. a rotor shaft;

2. a housing; 21. a chute; 22. a slide plate; 23. a sound-absorbing panel;

3. a correction component; 31. a needle bearing; 32. a rubber ring; 321. a cavity; 322. an air inlet; 323. an air outlet; 33. a correction rod;

4. a hinge mechanism; 41. a first slide bar; 42. a first slideway; 43. a first rotating rod; 44. a telescopic rod; 45. a second sliding rod; 46. a second slideway; 47. a second rotating rod; 48. a third sliding bar; 49. and a third slideway.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1-9, the present invention provides a technical solution:

a stepping motor having a rotor rotation torque offset correction function, comprising: a motor body 1 and a rotor shaft 11; the rotor shaft 11 is arranged in the motor body 1; the motor body 1 is arranged in the shell 2; a correction assembly 3 is arranged on one side of the shell 2 close to the motor body 1; the correcting component 3 is used for correcting the offset of the rotor shaft 11 in the rotating process; the rotor shaft 11 sequentially penetrates through the correction assembly 3 and the shell 2;

starting motor body 1, rotor shaft 11 begins the rotation thereupon, because the influence of rotor machining precision, the rotor takes place eccentrically at rotatory in-process, when rotor drive rotor shaft 11 rotated, certain degree's skew can take place for rotor shaft 11, rotor shaft 11 extrudees to correction subassembly 3, correction subassembly 3 receives behind the squeezing action of rotor shaft 11, correction subassembly 3 counteracts on rotor shaft 11, correction subassembly 3 revises rotor shaft 11's offset, make rotor shaft 11 reset, avoid rotor shaft 11 to appear the skew, increase the wearing and tearing between rotor shaft 11 and the casing 2, the noise that rotor shaft 11 rotates the in-process production has been reduced, the stability of motor operation has been improved.

As a specific embodiment of the invention, an access panel is arranged on one side of the casing 2 far away from the rubber ring 32, and the access panel is hinged with the bottom surface of the casing 2 through a hinge rod; the bottom surface of the shell 2 is provided with a sliding chute 21; a sliding plate 22 is arranged on the sliding groove 21; a triangular clamping block is arranged at the bottom of the sliding plate 22; the sliding plate 22 is connected with the sliding groove 21 in a sliding manner through a pulley; a sliding groove 21 extends from the side wall of the access panel;

when the motor body 1 needs to be overhauled, a worker opens a lockset for connecting the overhaul panel with the shell 2 to separate the overhaul panel from the shell 2, the overhaul panel rotates around the hinge rod to enable the overhaul panel to be in a parallel state with the bottom surface of the shell 2, and at the moment, the sliding groove 21 in the shell 2 is communicated with the sliding groove 21 on the surface of the overhaul panel; the triangular clamping block at the bottom of the sliding plate 22 is taken out by a worker, the sliding plate 22 is pulled to move towards one side close to the overhaul plate, the sliding plate 22 slides to the surface of the overhaul plate through the sliding groove 21, the worker can overhaul the motor body 1 immediately, the worker is prevented from dismounting the whole shell 2, and then the motor body 1 is overhauled, so that the workload of the worker is reduced, and the overhaul efficiency of the motor body 1 is improved; after motor body 1 overhauls and accomplishes, the staff pushes motor body 1 to casing 2 inside through slide 22, and rotor shaft 11 passes bearing 31 and casing 2, and the staff supports the pulley on slide 22 with the triangle fixture block afterwards, avoids the pulley not hard up to lead to motor body 1 to appear damaging, is the vertical state with 2 bottom surfaces of casing with the access panel rotation at last, pins access panel and casing 2 through the tool to lock.

As a specific embodiment of the present invention, the sound-absorbing board 23 is filled in the casing 2;

rotor shaft 11 produces the rotation in the motor body 1, and mechanical rotation can produce certain vibration, and the noise that the vibration produced propagates to casing 2 through the propagation of air, and the abatvoix 23 of packing in casing 2 weakens the sound wave of noise, realizes weakening of noise.

As a specific embodiment of the present invention, the sound-absorbing plate 23 has a honeycomb structure;

because the honeycomb shape has a large surface area, when noise sound waves contact the surface of the honeycomb, the noise sound waves enter holes of the honeycomb metal through diffuse reflection, the interior of the honeycomb vibrates through reflection, the sound waves are converted into heat energy, and the effect of weakening the noise is achieved; meanwhile, the honeycomb core has good heat-conducting property, and can effectively and quickly conduct locally-generated high temperature.

As an embodiment of the present invention, the correcting unit 3 includes: a needle bearing 31, wherein the inner ring of the needle bearing 31 is arranged on the rotor shaft 11; the outer ring of the needle bearing 31 is provided with a rubber ring 32; the needle roller bearing 31 is rotationally connected with the rubber ring 32; the rubber ring 32 is connected with the side wall of the shell 2; a plurality of cavities are arranged in the rubber ring 32; a plurality of pairs of correcting rods 33 are arranged in the cavity; a hinge mechanism 4 is arranged in the cavity of the rubber ring 32; two opposite correction rods 33 are hinged through a hinge mechanism 4; a plurality of pairs of the correcting rods 33 are spirally arranged along the axis of the rotor shaft 11; a pull rope is arranged on the correcting rod 33; the pull rope penetrates through the inner ring of the rubber ring 32 and is connected with the outer ring wall of the needle bearing 31;

the rotor drives the rotor shaft 11 to rotate, the rotor shaft 11 drives the inner ring of the needle bearing 31 to rotate, the needle roller inside the needle bearing 31 is driven to rotate around the inner ring of the needle bearing 31 in the rotation process of the inner ring of the needle bearing 31, when the rotor generates an eccentric phenomenon, the rotor drives the rotor shaft 11 to generate an offset, the inner ring of the needle bearing 31 is pressed in the offset process of the rotor shaft 11, when the inner ring of the needle bearing 31 is pressed, the needle roller in the needle bearing 31 is pressed outwards, the needle roller presses the outer ring of the needle bearing 31 outwards in the rotation process, the outer ring presses the correcting rod 33 in the rubber ring 32 along with the outer ring, the correcting rod 33 presses the hinge mechanism 4, the hinge mechanism 4 immediately pulls the correcting rod 33 at the other side to move towards the side far away from the needle bearing 31, the pull rope is pulled in the movement process of the correcting rod 33, the correcting rod 33 pulls the outer ring of the needle bearing 31 to move through the pull rope, so that the needle bearing 31 is reset, the needle bearing 31 resets and drives the rotor shaft 11 to reset, so that the rotor shaft 11 is prevented from being deviated, the abrasion between the rotor shaft 11 and the shell 2 is reduced, the noise generated in the rotation process of the rotor shaft 11 is reduced, and the running stability of the motor is improved.

As a specific embodiment of the present invention, a cavity 321 is disposed in the rubber ring 32, and the cavity 321 is provided with an air inlet 322 and an air outlet 323; one-way valves are arranged in the air inlet 322 and the air outlet 323; the air inlet 322 is communicated with the inside of the shell 2; the air outlet 323 penetrates through the shell 2;

when the needle bearing 31 is pressed outwards by the offset action of the rotor shaft 11 to the correction rod 33, the rubber ring 32 is also pressed to a certain degree, the rubber ring 32 is pressed to deform the cavity 321, so that the pressure in the cavity 321 is increased, the gas in the cavity 321 is sprayed out of the shell 2 through the one-way valve in the gas outlet 323, when the needle bearing 31 is reset under the action of the correction assembly 3, the rubber ring 32 loses the pressing force of the rotor shaft 11, at the moment, the gas pressure in the cavity 321 is smaller than the external gas pressure, the hot gas in the shell 2 enters the cavity 321 from the gas inlet 322 through the one-way valve in the gas inlet 322, so that the cavity 321 returns to the original state, and when the rotor shaft 11 drives the needle bearing 31 to press the rubber ring 32 again, the hot gas sucked in the cavity 321 is sprayed outwards, and the hot gas in the shell 2 is discharged.

As a specific embodiment of the present invention, the needle bearing 31 has micropores on its outer ring; the chamber in the rubber ring 32 is filled with lubricating oil,

when the rubber ring 32 is extruded, the lubricating oil filled in the cavity permeates to the joint of the inner ring of the rubber ring 32 and the outer ring of the needle bearing 31 through the pull rope, the joint is filled with the lubricating oil, the filled lubricating oil meets micropores formed in the outer ring of the needle bearing 31, and the lubricating oil flows into a revolute pair of a needle roller and the inner ring of the needle bearing 31 in the needle bearing 31 along the micropores, so that the revolute pair is lubricated, and the abrasion of the needle roller and the inner ring is reduced.

As an embodiment of the present invention, the hinge mechanism 4 includes: a first sliding rod 41 and a second sliding rod 45; the correcting rod 33 close to one side of the needle bearing 31 is connected with a first sliding rod 41; a first slideway 42 is arranged in the rubber ring 32; the first sliding rod 41 is connected in the first sliding rail 42 in a sliding manner; one end of the first sliding rod 41, which is far away from the correcting rod 33, is hinged with a first rotating rod 43; one end of the first rotating rod 43, which is far away from the first sliding rod 41, is hinged with a telescopic rod 44;

the correcting rod 33 close to the other side of the needle bearing 31 is connected with a second sliding rod 45; a second slideway 46 is arranged in the rubber ring 32; the second sliding rod 45 is connected in a second slideway 46 in a sliding manner; one end of the second sliding rod 45, which is far away from the correcting rod 33, is hinged with a second rotating rod 47; a third sliding rod 48 is hinged to one side, away from the second sliding rod 45, of the second rotating rod 47; one end of the third sliding rod 48, which is far away from the second rotating rod 47, is fixedly connected with an expansion rod 44; a third slideway 49 is arranged in the rubber ring 32; the third sliding rod 48 is connected to the third slide way 49 in a sliding manner;

the outer ring of the needle bearing 31 extrudes the correcting rod 33 outwards, the correcting rod 33 pushes the first slide rod 41 to slide on the first slide way 42, the first slide rod 41 moves to one side far away from the needle bearing 31, the first slide rod 41 pushes the first rotating rod 43 to rotate clockwise, the first rotating rod 43 rotates to drive the telescopic rod 44 to stretch, the telescopic rod 44 drives the third slide rod 48 to slide on the third slide way 49 in the stretching process, the third slide rod 48 moves to one side far away from the second rotating rod 47, and in the moving process of the third slide rod 48, the second rotating rod 47 is driven to rotate anticlockwise, the second rotating rod 47 rotates to drive the second sliding rod 45 to move, the second sliding rod 45 moves towards one side far away from the correcting rod 33 along the second sliding way 46, the second sliding rod 45 slides to drive the opposite correcting rod 33 to move, the correcting rod 33 pulls the pull rope, the pull rope pulls the outer ring of the needle bearing 31 to reset, and the needle bearing 31 drives the rotor shaft 11 to reset; the rotor shaft 11 is positioned at the center of the axis, so that the rotor shaft 11 is prevented from deviating, and the abrasion between the rotor shaft 11 and the shell 2 is reduced;

when the rotor shaft 11 reversely extrudes the correcting rod 33, the correcting rod 33 pushes the second sliding rod 45 to slide along the second sliding way 46, the second sliding way 46 drives the second rotating rod 47 to rotate anticlockwise, the second rotating rod 47 rotates to drive the third sliding rod 48 to move on the third sliding way 49, the third sliding rod 48 pulls the telescopic rod 44, the telescopic rod 44 drives the first rotating rod 43 to rotate clockwise, the first rotating rod 43 rotates to drive the first sliding rod 41 to slide on the first sliding way 42, the first sliding rod 41 drives the opposite correcting rod 33 to move, and the correcting rod 33 pulls the needle bearing 31 to reset through the pull rope.

The working principle of the invention is as follows:

the rotor drives the rotor shaft 11 to rotate, the rotor shaft 11 drives the inner ring of the needle bearing 31 to rotate, the needle roller inside the needle bearing 31 is driven to rotate around the inner ring of the needle bearing 31 in the rotation process of the inner ring of the needle bearing 31, when the rotor generates an eccentric phenomenon, the rotor drives the rotor shaft 11 to generate an offset, the inner ring of the needle bearing 31 is extruded in the offset process of the rotor shaft 11, the needle roller inside the needle bearing 31 is extruded outwards by the inner ring of the needle bearing 31 in the extrusion rotation process, the needle roller extrudes the outer ring of the needle bearing 31 outwards in the rotation process, the outer ring extrudes the correcting rod 33 inside the rubber ring 32 along with the outer ring, the correcting rod 33 extrudes the hinge mechanism 4, the hinge mechanism 4 immediately pulls the correcting rod 33 on the other side to move towards one side far away from the needle bearing 31, the pull rope in the movement process of the correcting rod 33, the correcting rod 33 pulls the outer ring of the needle bearing 31 to move through the pull rope, so that the needle bearing 31 is reset, the needle bearing 31 resets to drive the rotor shaft 11 to reset;

when the needle bearing 31 is pressed outwards by the offset action of the rotor shaft 11 to the correction rod 33, the rubber ring 32 is also pressed to a certain degree, the rubber ring 32 is pressed to deform the cavity 321, so that the pressure in the cavity 321 is increased, the gas in the cavity 321 is sprayed out of the shell 2 through the one-way valve in the gas outlet 323, when the needle bearing 31 is reset under the action of the correction assembly 3, the rubber ring 32 loses the pressing force of the rotor shaft 11, the gas pressure in the cavity 321 is smaller than the external gas pressure at the moment, the hot gas in the shell 2 enters the cavity 321 from the gas inlet 322 through the one-way valve in the gas inlet 322, so that the cavity 321 is restored to the original state, and when the rotor shaft 11 drives the needle bearing 31 to press the rubber ring 32 again, the hot gas sucked in the cavity 321 is sprayed outwards, so that the hot gas in the shell 2 is discharged;

when the rubber ring 32 is extruded, lubricating oil filled in the cavity permeates to the joint of the inner ring of the rubber ring 32 and the outer ring of the needle bearing 31 through the pull rope, the joint is filled with the lubricating oil, the filled lubricating oil meets micropores formed in the outer ring of the needle bearing 31, and the lubricating oil flows into a revolute pair of a needle roller and the inner ring of the needle bearing 31 in the needle bearing 31 along the micropores, so that the revolute pair is lubricated, and the abrasion of the needle roller and the inner ring is reduced;

the outer ring of the needle bearing 31 extrudes the correcting rod 33 outwards, the correcting rod 33 pushes the first slide rod 41 to slide on the first slide way 42, the first slide rod 41 moves to one side far away from the needle bearing 31, the first slide rod 41 pushes the first rotating rod 43 to rotate clockwise, the first rotating rod 43 rotates to drive the telescopic rod 44 to stretch, the telescopic rod 44 drives the third slide rod 48 to slide on the third slide way 49 in the stretching process, the third slide rod 48 moves to one side far away from the second rotating rod 47, and in the moving process of the third slide rod 48, the second rotating rod 47 is driven to rotate anticlockwise, the second rotating rod 47 rotates to drive the second sliding rod 45 to move, the second sliding rod 45 moves towards one side far away from the correcting rod 33 along the second sliding way 46, the second sliding rod 45 slides to drive the opposite correcting rod 33 to move, the correcting rod 33 pulls the pull rope, the pull rope pulls the outer ring of the needle bearing 31 to reset, and the needle bearing 31 drives the rotor shaft 11 to reset; the rotor shaft 11 is in the axial center position;

when the rotor shaft 11 extrudes the correcting rod 33 in the opposite direction, the correcting rod 33 pushes the second sliding rod 45 to slide along the second sliding way 46, the second sliding way 46 drives the second rotating rod 47 to rotate anticlockwise, the second rotating rod 47 rotates to drive the third sliding rod 48 to move on the third sliding way 49, the third sliding rod 48 pulls the telescopic rod 44, the telescopic rod 44 drives the first rotating rod 43 to rotate clockwise, the first rotating rod 43 rotates to drive the first sliding rod 41 to slide on the first sliding way 42, the first sliding rod 41 drives the opposite correcting rod 33 to move, and the correcting rod 33 pulls the needle bearing 31 to reset through the pull rope;

when the motor body 1 needs to be overhauled, a worker opens a lockset for connecting the overhaul panel with the shell 2 to separate the overhaul panel from the shell 2, the overhaul panel rotates around the hinge rod to enable the overhaul panel to be in a parallel state with the bottom surface of the shell 2, and at the moment, the sliding groove 21 in the shell 2 is communicated with the sliding groove 21 on the surface of the overhaul panel; the staff takes out the triangle fixture block of slide 22 bottom, pulling slide 22 is to the one side removal that is close to the access panel, slide 22 slides to the access panel surface through spout 21 on, the staff overhauls motor body 1 immediately, avoid the staff to pull down casing 2 is whole, overhaul motor body 1 again, overhaul the completion back when motor body 1, the staff pushes motor body 1 to casing 2 inside through slide 22, rotor shaft 11 passes bearing 31 and casing 2, the staff supports the pulley on the slide 22 with the triangle fixture block afterwards, avoid the pulley not hard up to lead to motor body 1 to appear damaging, it is vertical state to be with casing 2 bottom surfaces at last rotatory extremely with the access panel, pin access panel and casing 2 through the tool to lock.

It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A stepping motor having a rotor rotation torque offset correction function, comprising: a motor body (1) and a rotor shaft (11); the rotor shaft (11) is arranged in the motor body (1); the method is characterized in that: the motor body (1) is arranged in the shell (2); a correction assembly (3) is arranged on one side, close to the motor body (1), of the shell (2); the correction assembly (3) is used for correcting offset in the rotation process of the rotor shaft (11); the rotor shaft (11) sequentially penetrates through the correction assembly (3) and the shell (2).

2. A stepping motor having a rotor rotation torque offset correction function according to claim 1, wherein: the correction assembly (3) comprises: the needle bearing (31), the said needle bearing (31) inner race is installed on rotor shaft (11); a rubber ring (32) is arranged on the outer ring of the needle bearing (31); the needle roller bearing (31) is rotationally connected with the rubber ring (32); the rubber ring (32) is connected with the side wall of the shell (2); a plurality of cavities are arranged in the rubber ring (32); a plurality of pairs of correcting rods (33) are arranged in the cavity; a hinge mechanism (4) is arranged in the cavity of the rubber ring (32); the two opposite correcting rods (33) are hinged through a hinge mechanism (4); a plurality of pairs of the correcting rods (33) are spirally arranged along the axis of the rotor shaft (11); a pull rope is arranged on the correcting rod (33); the pull rope penetrates through the inner ring of the rubber ring (32) to be connected with the outer ring wall of the needle bearing (31).

3. A stepping motor having a rotor rotation torque offset correction function according to claim 2, wherein: the hinge mechanism (4) comprises: a first sliding rod (41) and a second sliding rod (45); a first sliding rod (41) is connected to the correcting rod (33) close to one side of the needle bearing (31); a first slideway (42) is arranged in the rubber ring (32); the first sliding rod (41) is connected in the first sliding way (42) in a sliding way; one end of the first sliding rod (41) far away from the correcting rod (33) is hinged with a first rotating rod (43); one end of the first rotating rod (43), which is far away from the first sliding rod (41), is hinged with a telescopic rod (44);

a second sliding rod (45) is connected with the correcting rod (33) close to the other side of the needle bearing (31); a second slideway (46) is arranged in the rubber ring (32); the second sliding rod (45) is connected in the second sliding way (46) in a sliding way; one end of the second sliding rod (45) far away from the correcting rod (33) is hinged with a second rotating rod (47); a third sliding rod (48) is hinged to one side, away from the second sliding rod (45), of the second rotating rod (47); one end of the third sliding rod (48) far away from the second rotating rod (47) is fixedly connected with a telescopic rod (44); a third slideway (49) is arranged in the rubber ring (32); and the third sliding rod (48) is connected to the third slide way (49) in a sliding manner.

4. A stepping motor having a rotor rotation torque offset correction function according to claim 1, wherein: an access panel is arranged on one side, away from the rubber ring (32), of the shell (2), and the access panel is hinged with the bottom surface of the shell (2) through a hinge rod; (ii) a A sliding groove (21) is formed in the bottom surface of the shell (2); a sliding plate (22) is arranged on the sliding groove (21); a triangular clamping block is arranged at the bottom of the sliding plate (22); the sliding plate (22) is connected with the sliding groove (21) in a sliding manner through a pulley; a sliding groove (21) extends on the side wall of the access panel.

5. A stepping motor having a rotor rotation torque offset correction function according to claim 2, wherein: a cavity (321) is arranged in the rubber ring (32), and the cavity (321) is provided with an air inlet (322) and an air outlet (323); one-way valves are arranged in the air inlet (322) and the air outlet (323); the air inlet (322) is communicated with the inside of the shell (2); the air outlet (323) penetrates through the shell (2).

6. A stepping motor having a rotor rotation torque offset correction function according to claim 2, wherein: micropores are formed in the outer ring of the needle bearing (31); and lubricating oil is filled in a cavity in the rubber ring (32).

7. A stepping motor having a rotor rotation torque offset correction function according to claim 4, wherein: and the sound-absorbing plate (23) is filled in the shell (2).

8. A stepping motor having a rotor rotation torque offset correction function according to claim 7, wherein: the sound absorption plate (23) is of a honeycomb structure.