A device for pressing motor commutator

Abstract

The present invention relates to the field of motor structure, and in particular to a device for pressing a motor commutator, wherein the commutator structure includes a mounting sleeve, an elastic sleeve, a connecting sleeve and a pole piece. The connecting sleeve is adapted to be mounted outside the mounting sleeve, and each limiting groove on the annular surface of the connecting sleeve is provided with a pole piece corresponding thereto, and the pole piece is limited to be able to move radially only relative to the mounting sleeve. The mounting sleeve is provided with elastic sleeves at both ends of the connecting sleeve, and the elastic part of the elastic sleeve pushes the pole piece toward the brush of the motor. When the motor is running, the brush in the motor is always in contact with the pole piece of the commutator to form a conductive connection, so that current can pass through the brush and the commutator. And the structure of using the elastic part of the elastic sleeve to push the pole piece toward the brush can keep the brush and the pole piece in close contact, and even after the brush is worn to a certain extent after long-term use, the pole piece can be kept against the brush, so compared with the structure in which the pole piece is fixed to the commutator, it is beneficial to improve the service life of the brush.

Description

Technical Field

[0001] The invention relates to the field of motor structures, in particular to a commutator structure of a motor and a device for press-fitting the commutator. Background Art

[0002] The commutator is a component of a DC motor that allows the motor to continue to rotate. The pole pieces in the commutator play the role of current commutation and current transmission by contacting the brushes. At present, the brushes in DC motors are generally placed horizontally relative to the commutator through the connection of the brushes, and the end faces of the brushes in contact with the commutator are set with arc surfaces. After the motor has been working for a long time, the rotation of the commutator will inevitably cause the brushes to wear and form gaps between the pole pieces, and they cannot maintain contact to transmit current, making the brushes unusable. Therefore, the brushes often need to be replaced. Summary of the invention

[0003] In view of the deficiencies raised by the above background technology, the present invention provides a commutator structure of a motor and a device for press-fitting the commutator.

[0004] In a first aspect, the present invention discloses a commutator structure of a motor, the commutator structure comprising:

[0005] A mounting sleeve, wherein a through mounting hole is provided at the center of the mounting sleeve, the rotor of the motor passes through the mounting hole, and one end of the mounting sleeve is clamped on the shaft shoulder of the rotor;

[0006] An elastic sleeve, one end of which is folded forward to form an elastic portion;

[0007] A connecting sleeve, wherein a plurality of limiting grooves are distributed on the annular surface of the connecting sleeve, the limiting grooves are T-shaped in cross section, and the limiting grooves penetrate the end surfaces at both ends of the connecting sleeve;

[0008] A pole piece, a T-shaped limiting portion is provided on the back of the pole piece;

[0009] Among them, the connecting sleeve is adapted to be fitted outside the mounting sleeve, and the mounting sleeve is provided with the elastic sleeve at both ends of the connecting sleeve, and each of the limiting grooves of the connecting sleeve corresponds to the pole piece, and the limiting portion of each pole piece is respectively inserted into each of the limiting grooves, and the limiting portion has a gap in the limiting groove for radial movement relative to the mounting sleeve, and at the same time, the pole piece is limited to only radial movement relative to the mounting sleeve, and the elastic portion pushes the pole piece toward the outside of the mounting sleeve, so that the pole piece is pushed toward the brush of the motor.

[0010] In a possible implementation of the first aspect, a blocking ring is provided at one end outside the mounting sleeve, a fixing nut is provided at the other end of the mounting sleeve, and the pole piece is confined between the blocking ring and the fixing nut.

[0011] In a possible implementation of the first aspect, the elastic parts of the two elastic sleeves are close to the middle of the mounting sleeve, and one end of one elastic sleeve away from the elastic part abuts against the blocking ring, and the other end of the elastic sleeve away from the elastic part abuts against the fixing nut, so that after the fixing nut is screwed until it is tightly pressed against the elastic sleeve, the distance between the fixing nut and the blocking ring is greater than the distance between the two ends of the pole piece.

[0012] In a second aspect, the present invention further discloses a device for press-fitting the above-mentioned commutator structure, the device comprising:

[0013] A conveyor, the conveyor comprising a first frame, a conveyor chain and a clamping assembly, the first frame is provided with a conveyor chain running in a plane, a plurality of clamping assemblies are provided at intervals on the conveyor chain, the clamping assembly comprises a connecting piece and a clamping bar, one end of the connecting piece is fixed to a link of the conveyor chain, and the other end of the connecting piece is provided with two clamping bars, the two clamping bars are used to clamp the rotor;

[0014] A turntable machine, comprising a second frame, a bottom plate and a turntable, wherein the bottom plate is fixed on the second frame, and a clearance notch provided on the bottom plate is located outside the second frame, the second frame is fixed on one side of the first frame so that the clearance notch is close to the first frame, the turntable is connected to the bottom plate for rotation, and the turntable has a plurality of accommodating holes distributed in an annular shape, and the accommodating holes are used to place the commutator;

[0015] A top press, the top press comprising a driving cylinder and a pressing sleeve, the pressing sleeve being fixed on a piston rod of the driving cylinder, and the driving cylinder being fixed below a clearance notch of the bottom plate;

[0016] Among them, when the turntable rotates and drives one of the accommodating holes to correspond to the clearance gap, the commutator in the accommodating hole falls from the clearance gap to the pressing sleeve, and the conveying chain drives the clamping assembly to move to the top of the clearance gap and pauses, and the piston rod of the driving cylinder extends to drive the pressing sleeve to lift the commutator to the outside of the rotor located on the clearance gap, and the commutator is against the shoulder of the rotor.

[0017] In a possible implementation of the second aspect, a support frame is fixed on the first frame, a blocking plate is fixed on the support frame, the blocking plate is located above the clearance gap corresponding to the bottom plate, and when the pressing sleeve lifts the commutator to be sleeved outside the rotor, the blocking plate blocks the top end of the rotor.

[0018] In a possible implementation of the second aspect, the clamping assembly also includes a first spring, a strip groove is arranged on the surface of the connecting piece away from one end of the conveying chain, and connecting parts are fixed at both ends of the strip groove under the connecting piece, a rectangular rod at one end of the clamping strip passes through the strip groove, and a first spring is respectively arranged between the two clamping strips and the two connecting parts, and the elastic force of the first spring stretching pushes the clamping strip toward the middle of the connecting piece.

[0019] In a possible implementation of the second aspect, the device also includes a centering mechanism, which includes a fixed seat and a movable seat, a through hole is set in the middle of the fixed seat, the fixed seat is fixed under the base plate, and the through hole corresponds to the clearance gap, the driving cylinder is located under the fixed seat, and the telescopic rod of the driving cylinder drives the pressing sleeve to move vertically relative to the through hole, both ends of the fixed seat are connected to the movable seat, and the two movable seats are restricted to slide linearly relative to the two ends of the fixed seat, when the commutator falls from the clearance gap to the pressing sleeve, the two movable seats simultaneously move to the middle of the fixed seat to restrict the two sides of the commutator.

[0020] In a possible implementation of the second aspect, the centering mechanism also includes a push rod, a driven rod, a first connecting rod and a second connecting rod, the push rod and the driven rod are respectively arranged at two ends of the fixed seat for rotation, and the push rod and the driven rod are respectively connected to the two moving seats through the first connecting rod, the second connecting rod is located under the fixed seat, and the two ends of the second connecting rod are respectively pivoted to the push rod and the driven rod; the upper end of the push rod extends upward above the fixed seat to form a pushing portion, and the side of the push rod close to the middle position is provided with an upwardly inclined first pivot portion, and the two ends of the first connecting rod connecting the push rod and the moving seat are respectively pivoted to the first pivot portion and the moving seat; the side of the upper end of the driven rod is provided with a downwardly inclined second pivot portion, and the two ends of the first connecting rod connecting the driven rod and the moving seat are respectively pivoted to the second pivot portion and the moving seat; when the conveying chain drives the rotor to move toward the turntable machine, another rotor arranged behind the rotor moves accordingly, and the pushing portion at the upper end of the push rod is pushed to swing in the direction close to the turntable.

[0021] In a possible implementation of the second aspect, the centering mechanism also includes a second spring, which is arranged under the fixed seat. A fixed fixing pin is also arranged under the fixed seat, and both ends of the second spring are respectively connected to the lower end of the push rod and the fixing pin, and the elastic force of the compression of the second spring pulls the lower end of the push rod toward the middle of the fixed seat; the end surface of the push rod arranged on the fixed seat also fixes a blocking rod, and the blocking rod blocks the upper side of the push rod facing away from the second spring.

[0022] In a possible implementation of the second aspect, both ends of the fixing seat are provided with upper and lower clearance grooves, and the push rod and the driven rod are respectively arranged in the two clearance grooves.

[0023] From the above description of the structure of the present invention, it can be seen that compared with the prior art, the present invention has the following advantages: when the motor equipped with the commutator structure of the present invention is running, the brushes in the motor are always in contact with the pole pieces of the commutator to form a conductive connection, so that the current can pass through the brushes and the commutator. And the structure of using the elastic part of the elastic sleeve to push the pole piece against the brush can keep the brush and the pole piece in close contact, even if the brush is worn to a certain extent after long-term use, the pole piece can be kept against the brush, so compared with the structure in which the pole piece is fixed to the commutator, it is beneficial to increase the service life of the brush. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the commutator of the present invention.

[0025] Figure 2 It is a cross-sectional schematic diagram of the commutator of the present invention.

[0026] Figure 3 It is a schematic diagram of the commutator after being decomposed.

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure of the connecting sleeve.

[0028] Figure 5 Schematic diagram of the three-dimensional structure of the pole piece.

[0029] Figure 6 Schematic diagram of the commutator structure installed in a DC motor.

[0030] Figure 7 It is a schematic diagram of a top view of the device of the present invention.

[0031] Figure 8 It is a schematic diagram of the three-dimensional structure of the device of the present invention.

[0032] Fig. 9 for Figure 8 A is an enlarged schematic diagram.

[0033] Fig.10 It is a schematic diagram of the three-dimensional structure of the conveyor.

[0034] Fig.11 It is a schematic diagram of the three-dimensional structure of the clamping assembly from a top view.

[0035] Fig.12 It is a schematic diagram of the three-dimensional structure of the clamping assembly from an upward perspective.

[0036] Fig.13This is a schematic diagram of the three-dimensional structure of the turntable machine from a top-down perspective.

[0037] Fig.14 This is a schematic diagram of the three-dimensional structure of the turntable machine from an upward perspective.

[0038] Fig.15 It is a schematic diagram of the three-dimensional structure of the centering mechanism after the upper end of the push rod swings toward the middle of the fixed seat.

[0039] Fig.16 Schematic diagram of the rotor moving to the clearance gap of the base plate.

[0040] Fig.17 for Fig.16 Schematic diagram of the enlarged view at B.

[0041] Fig.18 for Fig.16 Enlarged schematic diagram at C in the middle.

[0042] Fig.19 for Fig.16 Schematic diagram of the enlarged view at D in the middle. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0044] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0045] In addition, in the present application, directional terms such as "upper" and "lower" are defined relative to the orientation of the components in the drawings. It should be understood that these directional terms are relative concepts. They are used for relative description and clarification, and they may change accordingly according to the changes in the orientation of the components in the drawings.

[0046] The present invention provides a commutator 1 structure of a motor and a device for press-fitting the commutator 1, as shown in the attached Figures 1 to 3 As shown in FIG. 1 , the commutator 1 structure includes a mounting sleeve 11, an elastic sleeve 12, a connecting sleeve 13 and a pole piece 14. Figures 4 to 6The annular surface of the connecting sleeve 13 is distributed with a plurality of limiting grooves 131, the limiting grooves 131 are T-shaped in cross section, and the limiting grooves 131 penetrate the end surfaces of both ends of the connecting sleeve 13, the connecting sleeve 13 is adapted to fit outside the mounting sleeve 11, and each limiting groove 131 of the connecting sleeve 13 is correspondingly provided with a pole piece 14, forming a structure in which a circle of pole pieces 14 are distributed outside the mounting sleeve 11. Preferably, an insulating strip of rubber material can be pasted on one side of the pole piece 14 to fill the gap between two adjacent pole pieces 14.

[0047] One end of the elastic sleeve 12 is folded to form an elastic portion 121. The installation sleeve 11 is sleeved with elastic sleeves 12 at both ends of the connection sleeve 13. The elastic portions 121 of the two elastic sleeves 12 are close to the axial middle of the installation sleeve 11. A T-shaped limiting portion 141 is provided on the back of the pole piece 14. The limiting portions 141 of each pole piece 14 are respectively inserted into each limiting groove 131, and the limiting portion 141 has a gap in the limiting groove 131 for radial movement relative to the installation sleeve 11. The elastic portion 121 pushes the pole piece 14 toward the outside of the installation sleeve 11, so that the pole piece 14 pushes toward the brush 15 of the motor.

[0048] Continue to refer to the attached Figure 1 , a blocking ring 111 is provided at one end outside the mounting sleeve 11, a nut 112 is fixed at the other end of the mounting sleeve 11, and the pole piece 14 is restricted between the blocking ring 111 and the fixing nut 112, so as to restrict the pole piece 14 to only move radially relative to the mounting sleeve 11. Furthermore, the elastic parts 121 of the two elastic sleeves 12 are close to the middle of the mounting sleeve 11, one end of the elastic sleeve 12 away from the elastic part 121 abuts against the blocking ring 111, and the other end of the elastic sleeve 12 away from the elastic part 121 abuts against the fixing nut 112, so that after the fixing nut 112 is screwed until it is tightly pressed against the elastic sleeve 12, the spacing between the fixing nut 112 and the blocking ring 111 is greater than the spacing between the two ends of the pole piece 14, so as to prevent the pole piece 14 from being clamped and unable to move elastically in the assembled commutator 1.

[0049] The center of the mounting sleeve 11 is provided with a through mounting hole 101, and the rotor 2 of the motor passes through the mounting hole 101, so that the commutator 1 is fixed outside the rotor 2. In addition, the diameter of one end of the rotor 2 is expanded outward to form a shoulder, and the rotor 2 passes through the mounting hole 101 until the shoulder is clamped outside the mounting sleeve 11, so that one end of the mounting sleeve 11 is restricted to the rotor 2, and the other end of the mounting sleeve 11 can be penetrated by a split pin from the radial direction of the rotor 2 to block the other end of the mounting sleeve 11, so that the mounting sleeve 11 is restricted outside the rotor 2 and axially fixed.

[0050] It can be seen from the above structure that when the motor is running, the rotor 2 drives the commutator 1 to rotate, and the brush 15 in the motor is always in contact with the pole piece 14 of the commutator 1 to form a conductive connection, so that the current can pass through the brush 15 and the commutator 1. When the brush 15 is worn out after long-term use, the structure of using the elastic part 121 of the elastic sleeve 12 to push the pole piece 14 toward the brush 15 can also keep the brush 15 and the pole piece 14 in close contact, so there is no need to replace the brush 15 frequently, which is equivalent to prolonging the service life of the brush 15.

[0051] In a second aspect, the present invention also provides a device for press-fitting the commutator 1 structure, as shown in the attached Figure 7 and 8 As shown, the device includes a conveyor 3, a turntable machine, a top press and a centering mechanism. The conveyor 3 includes a first frame 31, a conveyor chain 32 and a clamping assembly 33. Sprocket wheels 321 are fixed at both ends of the first frame 31. The conveyor chain 32 passes through the two sprocket wheels 321 and meshes with the two sprocket wheels 321. A moving motor is fixed at the bottom of one of the sprocket wheels of the first frame 31. The moving motor drives the sprocket wheel 321 to rotate to drive the conveyor chain 32 to run on the first frame 31. A plurality of clamping assemblies 33 for clamping the motor rotor 2 are arranged at intervals on the conveyor chain 32. The turntable machine is used to convey the commutator 1 to the bottom of the rotor 2 clamped by the push assembly, and the top press is used to press the commutator 1 upward to fit outside the rotor 2.

[0052] As attached Fig.11 and 12As shown, the clamping assembly 33 includes a connecting member 331, a clamping strip 332 and a first spring 333. One end of the connecting member 331 is fixed on the link of the conveying chain 32, and the fixing method can be screwing or welding. Two clamping strips 332 are arranged at the other end of the connecting member 331, and the arrangement method is that the surface of the connecting member 331 away from one end of the conveying chain 32 is provided with a strip groove 3311, and the connecting parts 3312 are fixed at both ends of the strip groove 3311 below the connecting member 331, and the rectangular rod 3321 at one end of the clamping strip 332 passes through the strip groove 3311 to limit the clamping strip 332 to move linearly along the strip groove 3311 relative to the connecting member 331. The rectangular rod 3321 is also provided with a limit pin 3322 at the bottom surface of the connecting member 331 to limit the clamping strip 332 to only move linearly on the upper surface of the connecting member 331. A first spring 333 is provided between the two clamping strips 332 and the two connecting parts 3312, respectively. The elastic force of the first spring 333 pushes the clamping strip 332 toward the middle of the connecting member 331 to form a clamping force on the rotor 2. Furthermore, a clamping block 3323 is fixed on the side of the clamping strip 332 away from the rectangular rod 3321 and facing the middle of the connecting member 331. A concave clamping opening is provided on the side of the clamping block 3323 facing the middle of the connecting member 331, and a pattern is provided on the side of the clamping opening. When fixing the rotor 2, the two clamping strips 332 can be spread apart, and the rotor 2 can be placed between the two clamping blocks 3323. After that, the two clamping strips 332 can be loosened so that the two clamping strips 332 can clamp the rotor 2 under the force of the first spring 333. It is worth mentioning that after the clamping bar 332 fixes the rotor 2, the shaft shoulder of the rotor 2 should be exposed under the clamping bar 332, so that the subsequent pressing machine can directly push the commutator 1 upward to rest under the shaft shoulder.

[0053] The first frame 31 has a feeding station and a unloading station on both sides of the turntable machine. Fig. 9 and 10, the first frame 31 is fixed with a placement plate 36 under one side of the feeding station. When fixing the rotor 2, the bottom of the rotor 2 can be placed on the placement plate 36, and then the two clamping strips 332 are opened and the rotor 2 is pushed between the two clamping blocks 3323. This operation method is more convenient. Further, the first frame 31 can fix a base frame 37 under the placement plate 36, and the base frame 37 is spirally passed through the first screw rod 361 from bottom to top. Guide rods are fixed on both sides of the bottom of the placement plate 36, and the two guide rods are adapted to pass through the base frame 37 to limit the placement plate 36 to only move vertically. A shaft sleeve is also provided on the bottom surface of the placement plate 36, and a bearing is fixed in the shaft sleeve. The upper end of the first screw rod 361 penetrates and is fixed to the inner ring of the bearing. During operation, the placement plate 36 can be driven to move vertically by rotating the first screw rod 361 to adjust the placement plate 36 to the position of the clamping bar 332 and the clamping block 3323, thereby realizing the positioning adjustment of the position of the rotor 2 relative to the clamping bar 332. After the clamping bar 332 clamps the rotor 2, the shaft shoulder of the rotor 2 is located under the clamping block 3323. It can be seen that the height-adjustable structure of the placement plate 36 enables the device of the present invention to be applicable to the press-fitting of rotors 2 and commutators 1 of different specifications and sizes.

[0054] As attached Fig.13 and 14 As shown, the turntable machine includes a second frame 41, a bottom plate 42 and a turntable 43. The bottom plate 42 is fixed on the second frame 41, and a clearance gap 421 is set on one side of the bottom plate 42, and the clearance gap 421 is located outside the second frame 41. The second frame 41 is fixed to one side of the first frame 31, so that the clearance gap 421 is close to the first frame 31, and the turntable 43 is connected to the bottom plate 42 for rotation. Specifically, a rotating motor is fixed at the bottom of the second frame 41, and a rotating shaft is fixed at the center of the turntable 43. The rotating shaft passes through the bottom plate 42 and the upper surface of the second frame 41 and is connected to the output end of the rotating motor, so that the rotating motor can drive the turntable 43 to rotate. Refer to the attached Fig.17 The turntable 43 has a plurality of accommodating holes 431 distributed in an annular shape. Each accommodating hole 431 is used to place the commutator 1 to be pressed, and the commutator 1 is supported by the bottom plate 42 after being placed in the accommodating hole 431 .

[0055] Continue to refer to the attached Fig.14 The top press includes a drive cylinder 51 and a press sleeve 52. The drive cylinder 51 can be an actuator with a piston rod in the prior art, such as a hydraulic cylinder and an electric push rod, and the drive cylinder 51 is fixedly located below the clearance notch 421 of the bottom plate 42. Fig.15 and 16The upper end of the pressing sleeve 52 is a cylindrical structure with an open upper end, and the pressing sleeve 52 is fixed on the piston rod of the driving cylinder 51. When the turntable 43 of the turntable machine rotates to drive the commutator 1 in each accommodating hole 431 to move, when the turntable 43 rotates to drive the accommodating hole 431 to move to the clearance notch 421 of the bottom plate 42 and pause, the commutator 1 in the accommodating hole 431 loses its support and falls on the pressing sleeve 52 of the top press. At this time, the piston rod of the driving cylinder 51 is extended and extended to drive the pressing sleeve 52 to rise and form an action of lifting the commutator 1. Further, the first frame 31 is fixed with a support frame 34 at the position corresponding to the clearance notch 421 of the bottom plate 42, and a blocking plate 35 is provided on the support frame 34. When the pressing sleeve 52 lifts the commutator 1 to be sleeved outside the rotor 2, the blocking plate 35 blocks the top of the rotor 2 to prevent the rotor 2 from moving upward relative to the clamping assembly 33. Furthermore, a second screw can be fixed on the upper end of the blocking plate 35, and the second screw spirally passes through the upper end of the support frame 34 and is fixed with a hand wheel. During operation, the height of the blocking plate 35 can be adjusted by turning the hand wheel to block rotors 2 of different lengths.

[0056] Preferably, the pressing sleeve 52 is fixed to the piston rod by passing bolts through the bottom of the pressing sleeve 52 until the studs of the bolts pass through the pressing sleeve 52 and are screwed to the piston rod, thereby fixing the pressing sleeve 52. This method can easily replace the pressing sleeves 52 of different diameters and depths, so as to be suitable for press-fitting commutators 1 of different sizes.

[0057] As attached Figures 13 to 16 As shown, the centering mechanism includes a fixed seat 61 and a movable seat 62. The fixed seat 61 is fixed under the bottom plate 42, and a through hole 601 is set in the middle of the fixed seat 61, and the through hole 601 corresponds to the bottom plate 42. The driving cylinder 51 is located under the fixed seat 61, and the telescopic rod of the driving cylinder 51 drives the pressing sleeve 52 to move vertically relative to the through hole 601, and after the piston rod of the driving cylinder 51 is retracted downward, the upper surface of the pressing sleeve 52 is flush with the upper surface of the fixed seat 61, so that the commutator 1 loses support and can fall on the fixed seat 61 and the pressing sleeve 52. This method can expand the area of ​​the commutator 1 that falls from the clearance gap 421, and prevent the pressing sleeve 52 from being unable to contact the commutator 1 that falls from the clearance gap 421. Both ends of the fixed seat 61 are connected to the movable seat 62, and the two movable seats 62 are restricted to slide linearly relative to the two ends of the fixed seat 61. The restriction method can be that both sides of the fixed seat 61 are fixed with limit plates 611, and the two limit plates 611 are fixed with guide strips (not shown in the drawings) on one side facing the middle of the fixed seat 61, and the side surfaces on both sides of the push rod 63 are recessed inward to form guide grooves (not shown in the drawings), and the two guide grooves are respectively clamped outside the two guide strips with a clearance fit, so as to limit the movable seat 62 to only move relative to the fixed seat 61.

[0058] Continue to refer to the attached Fig.14 and 15The centering mechanism also includes a push rod 63, a driven rod 64, a first connecting rod 65 and a second connecting rod 66. The push rod 63 and the driven rod 64 are respectively arranged at the two ends of the fixed seat 61 for rotation, and the push rod 63 and the driven rod 64 are respectively connected to the two movable seats 62 through the first connecting rod 65. Preferably, both ends of the fixed seat 61 are provided with a clearance groove 602 running through the upper and lower ends, and the push rod 63 and the driven rod 64 are respectively arranged in the two clearance grooves 602, and the fixed seat 61 is fixed with a pivot seat 612 on both sides of the strip groove 3311, and a fixing pin is installed between the two pivot seats 612, and the push rod 63 and the driven rod 64 are respectively located between the two pivot seats 612 at the two ends of the fixed seat 61, and are sleeved outside the fixing pin, so that the push rod 63 and the driven rod 64 rotate with the two fixing pins as the axis.

[0059] Please refer to the attached Fig.18 and 19 The upper end of the push rod 63 extends upward above the fixed seat 61 to form a push portion 632. The side of the push rod 63 near the middle position is provided with an upwardly inclined first pivoting portion 631. The two ends of the first connecting rod 65 connecting the push rod 63 and the movable seat 62 are respectively pivoted with the first pivoting portion 631 and the movable seat 62. The side of the upper end of the driven rod 64 is provided with a downwardly inclined second pivoting portion 641. The two ends of the first connecting rod 65 connecting the driven rod 64 and the movable seat 62 are respectively pivoted with the second pivoting portion 641 and the movable seat 62. The pivoting structure in this embodiment can be a structure in which the above-mentioned pivoting seat 612, the push rod 63 and the driven rod 64 are connected by a fixing pin, so that the two pivoted parts can rotate with each other. The second connecting rod 66 is located under the fixed seat 61, and the two ends of the second connecting rod 66 are respectively pivotally connected to the lower end of the push rod 63 and the lower end of the driven rod 64. Preferably, the second connecting rod 66 can also be bent outward at the position below the through hole 601 of the fixed seat 61 to form a C-shaped yielding portion 661 to form a yielding portion for the pressing sleeve 52.

[0060] The above structure forms a connecting rod structure similar to a parallelogram. When the pushing portion 632 at the upper end of the push rod 63 is pushed toward the through hole 601 and swings downward, the movable seat 62 connected thereto can be driven to move toward the through hole 601 through the first connecting rod 65. At the same time, the lower end of the push rod 63 pulls the lower end of the driven rod 64 to swing toward the through hole 601 through the second connecting rod 66, so as to drive the movable seat 62 connected thereto to move toward the through hole 601 at the same time through another first connecting rod 65, so that the two push rods 63 move toward the middle of the fixed seat 61 at the same time to limit the two sides of the commutator 1, so that the commutator 1 keeps moving relatively to the coaxial center of the rotor 2 above it, so that the pressing sleeve 52 can smoothly lift the commutator 1 to the mounting hole 101 in the center of the mounting sleeve 11 and sleeve it outside the rotor 2.

[0061] It is worth mentioning that when the conveyor chain 32 drives the rotor 2 to move toward the turntable machine, the other rotor 2 arranged behind the rotor 2 moves with it and pushes the push part 632 at the upper end of the push rod 63 to swing downward, which can automatically drive the two moving seats 62 to adjust the center position of the commutator 1 that has fallen on the fixed seat 61 to be coaxial with the rotor 2 that is about to move to the gap 421. Preferably, the push part 632 can be a roller connected to both sides above the push rod 63, so as to reduce the resistance when the rotor pushes the push rod 63. The roller is connected to the push rod 63 in a way that the roller is set on both sides above the push rod 63, and then the bolt is passed through the push rod and the two rollers and connected to the nut, wherein the bolt has a thread only at the end, so that the nut is screwed into the thread of the bolt until it is tightened, and there is still a gap between the nut and the roller, so that the roller can rotate. This structure can also increase the height of the push rod 63 by replacing rollers with different outer diameters, so that more rotors 2 of different lengths can push the push rod 63.

[0062] Further, please refer to the attached Fig.18 The centering mechanism also includes a second spring 67, which is arranged under the fixed seat 61. A fixed pin is also arranged under the fixed seat 61. The two ends of the second spring 67 are respectively connected to the lower end of the push rod 63 and the fixed pin. Preferably, the two ends of the second spring 67 are hooks, which are respectively hooked on the push rod 63 and the fixed pin to form a connection. The lower end of the push rod 63 is pulled toward the middle of the fixed seat 61 by the elastic force of the compression of the second spring 67. The fixed seat 61 is provided with a stopper bar between the two pivot seats 612 on the end face of the push rod 63. The stopper bar 613 is used to block the upper side of the push rod 63 that is facing away from the second spring 67, so as to overcome the pulling force of the second spring 67 and keep the push rod 63 in an inclined state, so that the upper end of the push rod 63 remains inclined in the direction away from the fixed seat 61.

[0063] In addition, the present invention can also be configured with a control system, which can be a PLC controller. At the same time, the conveyor and the turntable are both configured with photoelectric sensors at the position corresponding to the clearance notch 421 of the bottom plate 42 to sense the movement of the rotor 2 and the commutator 1 to the position, and send a signal to the control system, so that the control system controls the conveying motor, the rotating motor and the driving cylinder 51 and other actuators to work in an orderly manner according to the signal. Specifically, the working process of the device of the present invention can be as follows:

[0064] The rotating disk 43 rotates to drive a receiving hole 431 to rotate to the clearance notch 421 of the bottom plate 42, so that the commutator 1 in the receiving hole 431 falls onto the pressing sleeve 52 and the fixing seat 61;

[0065] After the conveyor chain 32 moves and drives a clamping assembly 33 to move the clamped rotor 2 to the clearance gap 421, the conveyor chain 32 stops moving. During this process, another rotor 2 arranged behind the rotor 2 pushes the pushing portion 632 at the upper end of the push rod 63 of the centering mechanism during the movement, driving the two moving seats 62 to move toward the through hole 601 in the middle of the fixed seat 61 at the same time, so as to adjust the commutator 1 located on the fixed seat 61 to the connection hole at the center thereof and the coaxial center of the rotor 2 and the pressing sleeve 52;

[0066] The piston rod of the driving cylinder 51 extends to drive the pressing sleeve 52 to lift the commutator 1 to the outside of the rotor 2 located on the clearance notch 421, until the commutator sleeve is against the shoulder of the rotor 2, and then the piston rod retracts;

[0067] The rotating disk 43 continues to rotate, driving a receiving hole 431 to move to the clearance notch 421 of the bottom plate 42, and then the conveyor chain 32 continues to move to drive the clamping assembly to move, and the commutator 1 can be automatically pressed onto the rotor 2 in such a reciprocating cycle. When the conveyor chain 32 delivers the rotor 2 with the commutator 1 pressed onto it to the unloading station, the rotor 2 can be removed by pulling it downward.

[0068] During the process, it is only necessary to place the commutator 1 in the receiving hole 431 of the turntable 43 in order, place the rotor 2 between the two clamping bars 332 of the clamping assembly, and remove the rotor 2 that is pressed onto the commutator 1. There is no need to press the commutator 1 onto the rotor 2 with force, and the operation is relatively convenient.

[0069] It can be known from the above working process that the device of the present invention transports the rotor 2 and the commutator 1 to the specified position so that they correspond to each other up and down, and then presses the commutator 1 against the rotor 2 to complete the press-fitting of the commutator 1 to the rotor 2. Compared with the method of manually assembling the commutator 1 and the rotor 2 into a mold and then assembling them by a press machine, it is more convenient and is conducive to improving the production and assembly efficiency of the motor.

[0070] The above is only a specific implementation of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A device for press-fitting a motor commutator, characterized in that: The structure of the commutator comprises: A mounting sleeve, wherein a through mounting hole is provided at the center of the mounting sleeve, the rotor of the motor passes through the mounting hole, and one end of the mounting sleeve is clamped on the shaft shoulder of the rotor; An elastic sleeve, one end of which is folded forward to form an elastic portion; A connecting sleeve, wherein a plurality of limiting grooves are distributed on the annular surface of the connecting sleeve, the limiting grooves are T-shaped in cross section, and the limiting grooves penetrate the end surfaces at both ends of the connecting sleeve; A pole piece, a T-shaped limiting portion is provided on the back of the pole piece; The connecting sleeve is adapted to fit outside the mounting sleeve, the mounting sleeve is sleeved with the elastic sleeves at both ends of the connecting sleeve, the pole pieces are arranged correspondingly in the limiting grooves of the connecting sleeve, the limiting parts of the pole pieces are respectively inserted into the limiting grooves, and the limiting parts have gaps in the limiting grooves for radial movement relative to the mounting sleeve, and the pole pieces are limited to radial movement relative to the mounting sleeve, and the elastic parts push the pole pieces toward the outside of the mounting sleeve, so that the pole pieces push toward the brushes of the motor; The device comprises: A conveyor, the conveyor comprising a first frame, a conveyor chain and a clamping assembly, the first frame is provided with a conveyor chain running in a plane, a plurality of clamping assemblies are provided at intervals on the conveyor chain, the clamping assembly comprises a connecting piece and a clamping bar, one end of the connecting piece is fixed to a link of the conveyor chain, and the other end of the connecting piece is provided with two clamping bars, the two clamping bars are used to clamp the rotor; A turntable machine, comprising a second frame, a bottom plate and a turntable, wherein the bottom plate is fixed on the second frame, and a clearance notch provided on the bottom plate is located outside the second frame, the second frame is fixed on one side of the first frame so that the clearance notch is close to the first frame, the turntable is connected to the bottom plate for rotation, and the turntable has a plurality of accommodating holes distributed in an annular shape, and the accommodating holes are used to place the commutator; A top press, the top press comprising a driving cylinder and a pressing sleeve, the pressing sleeve being fixed on a piston rod of the driving cylinder, and the driving cylinder being fixed below a clearance notch of the bottom plate; The centering mechanism comprises a fixed seat, a movable seat, a push rod, a driven rod, a first connecting rod and a second connecting rod. A through hole is set in the middle of the fixed seat. The fixed seat is fixed under the bottom plate, and the through hole corresponds to the clearance gap. The driving cylinder is located under the fixed seat. The telescopic rod of the driving cylinder drives the pressing sleeve to move vertically relative to the through hole. Both ends of the fixed seat are connected to the movable seat. Both movable seats are restricted to slide linearly relative to both ends of the fixed seat. When the commutator falls from the clearance gap to the pressing sleeve, the two movable seats simultaneously move toward the middle of the fixed seat to restrict both sides of the commutator; the push rod and the driven rod are respectively arranged at both ends of the fixed seat for rotation, and the push rod and the driven rod are respectively connected to the two movable seats through the first The cam is connected with a connecting rod, the second connecting rod is located under the fixed seat, and the two ends of the second connecting rod are respectively pivotally connected to the push rod and the driven rod; the upper end of the push rod extends upward above the fixed seat to form a pushing portion, and the side of the push rod close to the middle position is provided with an upwardly inclined first pivoting portion, and the two ends of the first connecting rod connecting the push rod and the moving seat are respectively pivotally connected to the first pivoting portion and the moving seat; the side of the upper end of the driven rod is provided with a downwardly inclined second pivoting portion, and the two ends of the first connecting rod connecting the driven rod and the moving seat are respectively pivotally connected to the second pivoting portion and the moving seat; when the conveying chain drives the rotor to move toward the turntable machine, another rotor arranged behind the rotor moves accordingly, pushing the pushing portion at the upper end of the push rod to swing in the direction close to the turntable; Among them, when the turntable rotates and drives one of the accommodating holes to correspond to the clearance gap, the commutator in the accommodating hole falls from the clearance gap to the pressing sleeve, and the conveying chain drives the clamping assembly to move to the top of the clearance gap and pauses, and the piston rod of the driving cylinder extends to drive the pressing sleeve to lift the commutator to the outside of the rotor located on the clearance gap, and the commutator is against the shoulder of the rotor.

2. The device according to claim 1, characterized in that A blocking ring is arranged at one end outside the mounting sleeve, a fixing nut is arranged at the other end of the mounting sleeve, and the pole piece is restricted between the blocking ring and the fixing nut.

3. The device according to claim 2, characterized in that The elastic parts of the two elastic sleeves are close to the middle of the mounting sleeve, and one end of one elastic sleeve away from the elastic part abuts against the blocking ring, and the other end of the elastic sleeve away from the elastic part abuts against the fixing nut, so that after the fixing nut is screwed until it is tightly pressed against the elastic sleeve, the distance between the fixing nut and the blocking ring is greater than the distance between the two ends of the pole piece.

4. The device according to claim 1, characterized in that A support frame is fixed on the first frame, and a blocking plate is fixed on the support frame. The blocking plate is located above the clearance gap corresponding to the bottom plate. When the pressing sleeve lifts the commutator to be sleeved outside the rotor, the blocking plate blocks the top end of the rotor.

5. The device according to claim 1, characterized in that The clamping assembly also includes a first spring, a strip groove is arranged on the surface of the connecting piece away from one end of the conveying chain, and connecting parts are fixed at both ends of the strip groove under the connecting piece, a rectangular rod at one end of the clamping strip passes through the strip groove, and a first spring is arranged between the two clamping strips and the two connecting parts respectively, and the elastic force of the first spring stretching pushes the clamping strip toward the middle of the connecting piece.

6. The device according to claim 1, characterized in that The centering mechanism also includes a second spring, which is arranged under the fixed seat. A fixed fixing pin is also arranged under the fixed seat. The two ends of the second spring are respectively connected to the lower end of the push rod and the fixing pin. The elastic force of the compression of the second spring pulls the lower end of the push rod toward the middle of the fixed seat. The end face of the push rod arranged on the fixed seat also fixes a blocking rod, and the blocking rod blocks the upper side of the push rod facing away from the second spring.

7. The device according to claim 1, characterized in that Both ends of the fixing seat are provided with upper and lower making way grooves, and the push rod and the driven rod are respectively arranged in the two making way grooves.

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