CN113442033B

CN113442033B - Motor commutator polishing machine

Info

Publication number: CN113442033B
Application number: CN202010218259.9A
Authority: CN
Inventors: 张�焕; 杨军明; 陈建荣; 卢勃; 卢连苗
Original assignee: Nningbo Qiangsheng Electric Motor Co ltd
Current assignee: Nningbo Qiangsheng Electric Motor Co ltd
Priority date: 2020-03-25
Filing date: 2020-03-25
Publication date: 2022-06-10
Anticipated expiration: 2040-03-25
Also published as: CN113442033A

Abstract

The invention discloses a motor commutator grinding and polishing machine, and relates to the technical field of grinding and polishing machines; the polishing device comprises two baffles which are arranged in front and back, a swing frame positioned between the baffles, a lifting cylinder used for lifting the swing frame, a driving and reversing cylinder used for driving the swing frame to move along the axial direction of the driving and reversing cylinder, a plurality of limiting grooves which are arranged along the axial direction of the swing frame and are used for supporting a rotor, a rotating shaft limiting groove, a polishing mechanism, a lifting column mechanism, and a rotating mechanism, wherein the polishing mechanism is positioned above the baffles and is used for polishing the commutator of the rotor, the lifting column mechanism is positioned at two sides of the baffles and is used for supporting two ends of the rotating shaft of the rotor and realizing the lifting of the rotor, and the rotating mechanism realizes the rotation of the rotor after the lifting column mechanism lifts the rotor and is matched with the polishing mechanism or the polishing mechanism. The grinding mechanism is utilized for grinding, the polishing mechanism is used for polishing, and the swing frame and the baffle plate carry the rotor under the action of the lifting cylinder and the advancing and retreating cylinder.

Description

Motor commutator polishing machine

Technical Field

The invention belongs to the technical field of polishing machines, and particularly relates to a motor commutator polishing machine.

Background

The commutator is a component of a direct current motor and an alternating current series motor which are used for current commutation and can enable the motor to continuously rotate. In order to improve the service life of a direct current motor, the operation stability and reduce the noise and electromagnetic interference of the direct current motor, commutator grinding and polishing processes are mostly carried out on the market at present, the two processes basically need 2 people's pipelining work to achieve a certain yield, the quality of the sand paper taken manually during grinding depends on the experience of people, the grinding and polishing are the last process of commutator processing and are used for grinding burrs on the surface of the commutator and in a groove, so that a good contact surface is formed on the surface of the commutator, the soft running sound of the motor is ensured, and the reject ratio of abnormal sounds of the motor is reduced. The prior art has the defect of time and labor waste.

Disclosure of Invention

The invention aims to overcome the defects of time and labor waste in the prior art, and provides a motor commutator grinding and polishing machine which is time-saving and labor-saving.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a motor commutator burnishing and polishing machine, two baffles of arranging around including, the rocker that is located between the baffle, a lift cylinder for going up and down the rocker, a driving and reversing cylinder for driving the rocker along its axial motion, a plurality of spacing recess that are used for supporting the rotor that arrange along the axial of rocker, be located the pivot spacing groove that is used for supporting the pivot of rotor of baffle upside, be located the grinding machanism that is used for polishing the commutator of rotor above the baffle, be located the polishing machanism that is used for polishing the commutator of rotor above the baffle, be located the lift post mechanism that is used for supporting the pivot both ends of rotor and realizes the lift of rotor of baffle both sides, realize the slewing mechanism of rotor pivoted after lift post mechanism lifting rotor and grinding machanism or polishing mechanism cooperation. The grinding mechanism is used for grinding, the polishing mechanism is used for polishing, and the swing frame and the baffle plate carry the rotor under the action of the lifting cylinder and the advancing and retreating cylinder.

Preferably, the polishing mechanism comprises a driving wheel, a driven wheel, a supporting plate for supporting the driving wheel and the driven wheel, an abrasive paper tape connected between the driving wheel and the driven wheel in an annular shape, and a polishing motor for driving the driving wheel to rotate. The structure is simple.

Preferably, the polishing mechanism comprises a polishing wheel and a polishing motor for rotating the polishing wheel. The structure is simple.

Preferably, the rotating mechanism comprises a rotating belt positioned above the swing frame, rotating wheels positioned at two ends of the rotating belt, and a rotating motor for rotating the rotating wheels. The structure is simple.

Preferably, the lifting column mechanism includes two rollers supported at a lower side of the rotation shaft of the rotor, a roller bracket for supporting the rollers, and a cylinder for lifting the roller bracket. The structure is simple.

Preferably, the device further comprises a manipulator for grabbing the processed rotor. Further saves time and labor.

Preferably, a sliding groove is formed in the inner edge of the driving wheel, a first protrusion is fixedly connected to the sliding groove, an output shaft of the polishing motor penetrates through the rotating wheel, a second protrusion is fixedly connected to the sliding groove, an elastic element used for connecting the first protrusion and the second protrusion is arranged in the sliding groove, the elastic element is attached to the outer edge of the output shaft, a tension sensor is arranged at the joint of the elastic element and the first protrusion, an arc sliding groove is formed in the corresponding position of the driven wheel of the supporting plate, the circle center of the arc sliding groove is located at the circle center of the driving wheel, a supporting shaft used for supporting the driven wheel is connected to the arc sliding groove in a sliding mode, a rotating rod is rotatably connected to the output shaft of the polishing motor, one end, away from the polishing motor, of the rotating rod is fixedly connected to the supporting shaft, a gear is rotatably connected to the rotating rod, and is sleeved on the output shaft of the polishing motor and rotatably connected with the output shaft, be equipped with the electro-magnet between grinding motor's output shaft and the gear, the electro-magnet rigid coupling is on grinding motor's output shaft, the trombone slide has been arranged along its axial in the dwang, trombone slide one end be equipped with gear engagement's driven gear, the last rigid coupling of driven gear has rather than coaxial roller of acting as go-between, be connected with on the trombone slide and act as go-between, act as go-between and wear out and be connected with the iron plate from the trombone slide other end, the iron plate below is equipped with the second electro-magnet, be equipped with the infrared ray sensor who is used for responding to the change of iron plate vertical position in the backup pad. The friction force of the commutator can not be reduced due to the change of the thickness and the friction coefficient of the abrasive leather paper tape in the grinding process, so that the grinding effect of different commutators is close.

The invention has the beneficial effects that: the invention provides a motor commutator grinding and polishing machine which is time-saving and labor-saving; the polishing effect is stable.

Drawings

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

FIG. 2 is an enlarged view at A of FIG. 1;

FIG. 3 is an enlarged view at B of FIG. 1;

FIG. 4 is a schematic view of the rotor resting on the baffle;

FIG. 5 is a schematic view of the rotor being lifted by the lift post mechanism against the abrasive paper tape and the rotating tape;

FIG. 6 is a cross-sectional view of the grinding mechanism;

fig. 7 is a sectional view of a rotating lever;

FIG. 8 is a schematic view showing that the elastic member is elongated and the output shaft is rotated to make the sanding position of the abrasive belt constant during sanding of the commutator;

figure 9 is a schematic diagram of the triggering of the second electromagnet following the pulling of the iron block as the friction force decreases.

In the figure: the device comprises a baffle 1, a swing frame 3, a lifting cylinder 4, a forward and backward cylinder 5, a limiting groove 6, a rotor 7, a rotating shaft 8, a rotating shaft limiting groove 9, a commutator 10, a driving wheel 11, a driven wheel 12, a supporting plate 13, a sand paper tape 14, an iron core 15, a polishing wheel 16, a rotating belt 17, a rotating wheel 18, a manipulator 19, a chute 20, a first bulge 21, a second bulge 22, an elastic element 23, a tension sensor 24, an arc chute 25, a supporting shaft 26, a rotating rod 27, a gear 28, a wire drawing groove 29, a driven gear 30, an electromagnet 31, a wire drawing roller 32, a wire drawing 33, an iron block 34, a second electromagnet 35, a position sensor 36, a roller 37 and an output shaft 38.

Detailed Description

The invention is explained in further detail below with reference to the figures and the detailed description:

example (b):

referring to fig. 1 to 9, a motor commutator grinding and polishing machine, the device comprises two baffle plates 1 which are arranged in front and back, a swing frame 3 positioned between the baffle plates 1, a lifting cylinder 4 used for lifting the swing frame 3, a driving and reversing cylinder 5 used for driving the swing frame 3 to move along the axial direction of the swing frame 3, a plurality of limiting grooves 6 arranged along the axial direction of the swing frame 3 and used for supporting a rotor 7, a rotating shaft limiting groove 9 positioned on the upper side of the baffle plate 1 and used for supporting a rotating shaft 8 of the rotor 7, a grinding mechanism positioned above the baffle plate 1 and used for grinding a commutator 10 of the rotor 7, a polishing mechanism positioned above the baffle plate 1 and used for polishing the commutator 10 of the rotor 7, lifting column mechanisms positioned on two sides of the baffle plate 1 and used for supporting two ends of the rotating shaft 8 of the rotor 7 and realizing the lifting of the rotor 7, and a rotating mechanism used for realizing the rotation of the rotor 7 after the lifting column mechanisms lift the rotor 7 and are matched with the grinding mechanism or the polishing mechanism; and a manipulator 19 for gripping the processed rotor 7.

The polishing mechanism comprises a driving wheel 11, a driven wheel 12, a supporting plate 13 for supporting the driving wheel 11 and the driven wheel 12, an abrasive leather paper tape 14 which is annularly connected between the driving wheel 11 and the driven wheel 12, and a polishing motor for driving the driving wheel 11 to rotate; the inner edge of action wheel 11 is equipped with spout 20, the rigid coupling has first arch 21 in the spout 20, grinding motor's output shaft 38 passes and rotates wheel 18 and the rigid coupling has second arch 22 in spout 20, be equipped with the elastic element 23 who is used for connecting first arch 21 and second arch 22 in spout 20, elastic element 23 laminates the outer fringe at output shaft 38, elastic element 23 is equipped with tension sensor 24 with the junction of first arch 21, the backup pad is equipped with circular arc spout 25 at driven wheel 12 corresponding position, the centre of a circle of circular arc spout 25 is located the centre of a circle department of action wheel 11, sliding connection has the back shaft 26 that is used for supporting driven wheel 12 in circular arc spout 25, rotating connection has dwang 27 on grinding motor's output shaft 38, grinding motor's one end and back shaft 26 rigid coupling are kept away from to dwang 27, the internal rotation of dwang 27 is connected with gear 28, gear 28 cover is established on grinding motor's output shaft 38 and is connected rather than rotating, be equipped with electro-magnet 31 between grinding motor's output shaft 38 and the gear 28, electro-magnet 31 rigid coupling is on grinding motor's output shaft 38, the trombone groove 29 has been arranged along its axial in the dwang 27, trombone groove 29 one end is equipped with the driven gear 30 with the meshing of gear 28, the rigid coupling has rather than coaxial roller 32 of acting as go-between on the driven gear 30, be connected with 33 acting as go-between on the

trombone groove

29, 33 acting as go-between is worn out and is connected with iron plate 34 from the trombone groove 29 other end, iron plate 34 below is equipped with second electro-magnet 35, be equipped with position sensor 36 that is used for responding to the change of iron plate 34 vertical position in the backup pad.

The polishing mechanism comprises a polishing wheel 16 and a polishing motor for rotating the polishing wheel 16.

The rotating mechanism comprises a rotating belt 17 positioned above the swing frame 3, rotating wheels 18 positioned at two ends of the rotating belt 17 and a rotating motor used for rotating the rotating wheels 18.

The lifting column mechanism includes two rollers 37 supported on the lower side of the rotating shaft 8 of the rotor 7, a roller support for supporting the rollers 37, and a cylinder for lifting the roller support.

Principle of embodiment:

one of the baffle plates 1 is supported between the iron core 15 and the commutator 10, and the two baffle plates 1 are positioned at two opposite sides of the iron core 15.

The number of the lifting column mechanisms is four, two of the lifting column mechanisms are positioned at the grinding mechanism, and the other two lifting column mechanisms are positioned at the polishing mechanism. The number of the rotating mechanisms is two, wherein one rotating mechanism is positioned at the grinding mechanism, and the other rotating mechanism is positioned at the polishing mechanism.

The two ends of a rotating shaft 8 of a rotor 7 are erected in a rotating shaft limiting groove 9 of a baffle plate 1, then under the action of an air cylinder, a roller 37 rises, the roller 37 abuts against the two opposite sides of the lower side of the rotating shaft 8, the rotor 7 is separated from the rotating shaft limiting groove 9, a commutator 10 of the rotor 7 moves towards a sand paper tape 14, when the commutator 10 abuts against the lower side of the sand paper tape 14, an iron core 15 of the rotor 7 abuts against the lower side of a rotating belt 17, the rotating motor runs, the rotating belt 17 rotates, the rotor 7 rotates, the commutator 10 rotates, the rollers 37 at the two ends of the rotating shaft 8 also rotate, relative friction is generated between the commutator 10 and the sand paper tape 14, so that the commutator 10 is polished, after polishing is completed, the rotor 7 is descended by a lifting column mechanism, the two ends of the rotor are re-supported on the baffle plate 1, the lifting column mechanism is separated from the rotor, then a lifting air cylinder 4 runs, a swing frame 3 rises, the swing frame 3 lifts the rotor, the rotor is separated from the baffle 1, then the rotor moves in and out of the cylinder 5, the polished rotor moves towards the polishing mechanism, and a new rotor to be polished moves to the polishing mechanism; when a polished rotor moves to a position corresponding to a polishing mechanism, a lifting cylinder 4 descends, a swing frame 3 descends, two ends of the rotor are placed on a baffle plate 1 again, the rotor is separated from the swing frame 3, then an advancing and retreating cylinder 5 drives the swing frame 3 to return to the original position again, then a lifting column mechanism operates to lift the rotor to be polished, a commutator 10 moves upwards to be close to a polishing wheel 16, the polishing wheel 16 rotates to polish the commutator 10, at the moment, an iron core 15 of the rotor abuts against a corresponding rotating belt 17, the rotating belt rotates to drive the rotor to rotate, so that the commutator 10 is polished in all directions, after polishing is completed, the lifting column mechanism lowers the rotor, two ends of the rotor abut against the baffle plate again, the lifting column mechanism is separated from the rotor, then the swing frame 3 ascends to lift the rotor again, the rotor is separated from the baffle plate, the advancing and retreating cylinder 5 operates, and the polished rotor leaves the polishing mechanism, and a new rotor to be polished is run to the polishing mechanism and the rotor leaving the polishing mechanism is removed by the robot 19.

During polishing, the commutator 10 is polished at one point on the abrasive leather paper tape 14, and the polishing rotor rotates for a certain number of turns each time, so that the polishing time and the polishing degree of each commutator are ensured to be the same; when the abrasive paper tape 14 fails, the driving wheel 11 rotates for a certain angle, the abrasive paper tape 14 moves for a certain distance, and the abrasive paper tape 14 changes one point to polish the commutator again; the grinding motor and the rotating motor adopt stepping motors so as to well control the rotation angle and the number of turns of the motor, and when the abrasive paper tape 14 rotates for a turn, an alarm can give an alarm to remind an operator to replace the abrasive paper tape 14.

During the grinding process, the abrasive paper tape 14 becomes thinner gradually, the friction coefficient of the abrasive paper tape 14 is reduced, and therefore the friction force and the pressure between the abrasive paper tape 14 and the commutator 10 are reduced; this results in the same number of revolutions of grinding of two rotors in succession, the grinding of the rotor ground before being finer than the grinding of the rotor ground after, the quality of grinding being uneven, and an improvement is proposed for this purpose.

In an initial state, the supporting shaft 26 abuts against the bottom end of the arc chute 25 under the action of gravity, the lifting column mechanism upwards lifts the rotor, the commutator continues to move upwards for a certain distance after abutting against the abrasive paper tape 14, the supporting shaft 26 upwards slides for a certain distance along the arc chute 25, at the moment, the abrasive paper tape 14 is extruded on the commutator by virtue of constant weight of the iron blocks 34 and the like, the pressure between the abrasive paper tape 14 and the commutator is constant, and the pressure cannot be reduced due to thinning of the abrasive paper tape 14; however, as sanding progresses, the friction coefficient of the abrasive paper tape 14 decreases, and the friction between the abrasive paper tape 14 and the commutator still gradually decreases; to compensate for the reduction in the coefficient of friction; the following protocol was used.

The rotor is driven to rotate by the rotation of the rotating belt, the output shaft is in a static state, friction force exists between the abrasive leather paper belt 14 and the commutator, under the action of the friction force, relative rotation can occur between the driving wheel 11 and the output shaft 38, the elastic element 23 can adopt a spring or an elastic rope, the elastic element extends for a certain length, relative movement can occur between the abrasive leather paper belt and the commutator, in order to ensure that the grinding position of the commutator on the abrasive leather paper belt 14 is not changed (the next position is consumed until the abrasive leather paper belt is consumed at the position), so that the utilization rate of the abrasive leather paper belt 14 is higher, the output shaft 38 rotates for a certain angle according to the length of the extension of the elastic element, so that the abrasive leather paper belt 14 is always ground at the same position, the rotating angle of the output shaft can be obtained according to the length change value of the elastic element and the radius of the output shaft, and the length change value can be obtained by the force value change calculation of the tension sensor according to the Hooke's law, (taking the example in fig. 8, when the commutator rotates clockwise, the abrasive paper tape rotates counterclockwise by a certain angle, the first protrusion rotates counterclockwise by a certain angle, the contact point of the abrasive paper tape and the commutator moves rightwards by a certain distance, and the output shaft rotates clockwise by a certain angle to drive the abrasive paper tape to move leftwards by a certain distance so that the contact point of the abrasive paper tape is not changed), this results in a reduction in the friction between the abrasive paper tape 14 and the commutator, and as the friction is reduced, the elastic element is shortened, and at this time (assuming the output shaft is stationary) the driving wheel 11 and the first protrusion are rotated clockwise by a certain angle to rotate the abrasive paper tape 14, and at this time, the output shaft 38 rotates anticlockwise by the same angle according to the shortened length of the elastic element, so that the abrasive leather paper belt 14 is always polished at the same position; the angle of rotation can be converted from the shortened length of the elastic element to the radius of the output shaft 38.

With the reduction of the friction force caused by the reduction of the friction coefficient, the output shaft 38 rotates slowly, which drives the gear 28 to rotate, the driven gear 30 to rotate, the wire drawing groove 29 to rotate, thereby winding the wire 33 around the wire drawing roller, the iron block 34 will move upward, and in the initial state, the iron block 34 corresponds to the position sensor 36, when the iron block 34 moves upward for a certain distance, at this time, the iron block 34 is staggered with the position sensor 36, which indicates that the friction force at this time has been reduced to a certain extent, the position sensor 36 is connected with the second electromagnet 35, the position sensor 36 triggers the second electromagnet 35, the second electromagnet 35 adsorbs the iron block, the pull force of the iron block on the pull wire is increased, therefore, the pressure of the abrasive paper tape 14 on the commutator is increased, the friction force between the abrasive paper tape 14 and the commutator is increased, and the loss of the friction force caused by the reduction of the friction coefficient is compensated.

After polishing is finished, the commutator is separated from the abrasive paper tape, the friction force becomes zero, at the moment, the elastic element is shortened to a free state, the first bulge and the second bulge are not positioned before polishing is started, at the moment, the electromagnet is closed, and the pull wire wound on the pull wire roller is pulled out under the action of the gravity of the iron block; and when the position on the abrasive paper tape is consumed, the output shaft rotates by a certain angle, and the abrasive paper tape is moved for a certain distance to polish the next round.

Claims

1. A motor commutator grinding and polishing machine is characterized by comprising two baffles arranged in front and back, a swing frame positioned between the baffles, a lifting cylinder used for lifting the swing frame, a driving and reversing cylinder used for driving the swing frame to move along the axial direction of the swing frame, a plurality of limiting grooves arranged along the axial direction of the swing frame and used for supporting a rotor, a rotating shaft limiting groove positioned on the upper side of the baffles and used for supporting a rotating shaft of the rotor, a grinding mechanism positioned above the baffles and used for grinding the commutator of the rotor, a polishing mechanism positioned above the baffles and used for polishing the commutator of the rotor, lifting column mechanisms positioned on two sides of the baffles and used for supporting two ends of the rotating shaft of the rotor and realizing the lifting of the rotor, and a rotating mechanism used for realizing the rotation of the rotor after the lifting column mechanisms lift the rotor and are matched with the grinding mechanism or the polishing mechanism, wherein the grinding mechanism comprises a driving wheel, a driven wheel, a supporting plate used for supporting the driving wheel and the driven wheel, The polishing device comprises an annular abrasive belt connected between a driving wheel and a driven wheel, and a polishing motor driving the driving wheel to rotate, wherein a sliding groove is formed in the inner edge of the driving wheel, a first bulge is fixedly connected in the sliding groove, an output shaft of the polishing motor penetrates through the rotating wheel and is fixedly connected with a second bulge in the sliding groove, an elastic element used for connecting the first bulge and the second bulge is arranged in the sliding groove, the elastic element is attached to the outer edge of the output shaft, a tension sensor is arranged at the joint of the elastic element and the first bulge, an arc sliding groove is formed in the corresponding position of the driven wheel of a supporting plate, the circle center of the arc sliding groove is located at the circle center of the driving wheel, a supporting shaft used for supporting the driven wheel is connected in the arc sliding groove in a sliding mode, a rotating rod is rotatably connected to the output shaft of the polishing motor, and one end, far away from the polishing motor, is fixedly connected with the supporting shaft, the dwang internal rotation is connected with the gear, the gear housing is established on grinding motor's output shaft and is connected rather than rotating, be equipped with the electro-magnet between grinding motor's output shaft and the gear, the electro-magnet rigid coupling is on grinding motor's output shaft, the trombone groove has been arranged along its axial in the dwang, trombone groove one end is equipped with the driven gear with gear engagement, the last rigid coupling of driven gear has rather than coaxial roller of acting as go-between, be connected with the acting as go-between on the trombone groove, act as go-between and wear out and be connected with the iron plate from the trombone groove other end, the iron plate below is equipped with the second electro-magnet, be equipped with the infrared ray sensor who is used for responding to the change of iron plate vertical position in the backup pad.

2. The motor commutator grinding and polishing machine of claim 1, wherein the polishing mechanism includes a polishing wheel, a polishing motor for rotating the polishing wheel.

3. The motor commutator grinding and polishing machine as claimed in claim 1, wherein the rotating mechanism includes a rotating belt located above the swing frame, rotating wheels located at both ends of the rotating belt, and a rotating motor for rotating the rotating wheels.

4. The motor commutator grinding and polishing machine of claim 1, wherein the lifting column mechanism includes two rollers supported on a lower side of the rotation shaft of the rotor, a roller bracket for supporting the rollers, and a cylinder for lifting the roller bracket.

5. The motor commutator grinding and polishing machine of claim 1, 2, 3 or 4, further comprising a robot for grasping the processed rotor.