Direct current motor rotor grooving device and grooving method

Abstract

The invention discloses a direct current motor rotor grooving device and grooving method.The direct current motor rotor grooving device comprises a base table and a grooving mechanism, the top of the base table is provided with a clamping mechanism used for transversely and horizontally clamping a motor rotor, the grooving mechanism comprises a grooving motor, a nut and a grooving blade, and an output shaft of the grooving motor is fixedly connected with a transmission shaft; the transmission shaft is in a conical column shape, the bottom of the transmission shaft is fixed to an output shaft of the grooving motor, the top of the transmission shaft is coaxially and fixedly connected with a threaded column matched with the nut, the grooving blade penetrates through the threaded column to abut against the top of the transmission shaft and then is fastened through nut threads, and the nut thread fastening direction is opposite to the driving direction of the grooving motor. An adjusting mechanism is arranged at the top of the base table and used for adjusting the position of the grooving blade. According to the grooving device, the grooving stability of the grooving cutter blade is guaranteed, and meanwhile subsequent disassembly and replacement are not affected.

Description

Technical Field

[0001] The invention belongs to the technical field of motor processing, and in particular relates to a direct current motor rotor notching device and a notching method. Background Art

[0002] The commutator is an important part of the DC motor rotor, which plays a commutation role when the motor is working. The commutator is made of three materials: copper bars, mica sheets, and glass fibers, which are hot-pressed in a molding die. Since the copper bars and mica sheets are placed along the inner circle of the molding die in the molding die, the outer circle of the copper bars and the outer circle of the mica sheets are the same size on the die-cast commutator. Since the end face of the mica sheet is relatively rough, when the brush moves relative to the commutator surface, the hard mica sheet will not only scratch the brush, but also cause the brush to arc; the temperature during arcing reaches more than one thousand degrees. Such a high temperature is enough to destroy the motor; therefore, the mica sheet must be cut down a little, generally one millimeter lower than the commutator segment. We call this process of cutting the mica sheet down a little "grooving".

[0003] Mica requires very high precision and stability during the grooving process. In order to ensure a high-precision grooving effect, the traditional grooving blade installation structure usually needs to adopt fastening measures to prevent the grooving blade from shaking during high-speed operation and ensure the accuracy of grooving. However, in the prior art, the installation of the grooving blade still has certain difficulties. Specifically, the traditional grooving blade installation structure is complex, requiring the blade to have extremely high fastness to prevent the blade from loosening or shaking when rotating at high speed, which makes the installation, disassembly and replacement of the blade more troublesome. In order to facilitate the disassembly and replacement of the blade, a simpler installation structure is usually adopted. However, the fastening degree of this structure is low and it cannot effectively prevent the blade from loosening or shaking. Therefore, how to facilitate the disassembly and replacement of the blade while ensuring the stable fastening of the blade is still a technical problem. Summary of the invention

[0004] The present invention aims at solving the problems in the prior art and proposes the following technical solutions:

[0005] A DC motor rotor notching device comprises a base and a notching mechanism, wherein a clamping mechanism is arranged on the top of the base for horizontally clamping the motor rotor, wherein the notching mechanism comprises a notching motor, a nut and a notching blade, wherein the output shaft of the notching motor is fixedly connected with a transmission shaft, the transmission shaft is in a conical column shape and the bottom is fixed with the output shaft of the notching motor, the top of the transmission shaft is coaxially fixedly connected with a threaded column adapted to the nut, the notching blade passes through the threaded column and abuts against the top of the transmission shaft and is fastened by the nut thread, and the fastening direction of the nut thread is opposite to the driving direction of the notching motor;

[0006] An adjustment mechanism is provided on the top of the base for adjusting the position of the groove cutting blade.

[0007] As a preferred embodiment of the above technical solution, a plurality of positioning protrusions are fixedly connected to the top of the transmission shaft, and the protrusion height of the positioning protrusions is adapted to the thickness of the groove cutting blade;

[0008] The groove cutting blade is provided with a plurality of positioning holes, and the positioning holes and the positioning protrusions are matched.

[0009] As a preferred embodiment of the above technical solution, the notching mechanism further includes a mounting plate, the notching motor is fixedly mounted on one side of the mounting plate, and the other side of the mounting plate is mounted on the adjusting mechanism.

[0010] As a preferred embodiment of the above technical solution, the adjustment mechanism includes a sliding base slidably connected to the top of the base in a transverse direction, an upper sliding plate is slidably connected to the top of the sliding base in a longitudinal direction, a triangular connector is fixedly connected to the top of the upper sliding plate, a hollow vertical plate is fixedly connected to the corner side of the triangular connector, and the mounting plate is vertically slidably connected to the other side of the hollow vertical plate;

[0011] The adjustment mechanism also includes a lateral moving component, a longitudinal moving component and a vertical moving component.

[0012] As a preferred embodiment of the above technical solution, the lateral movement assembly includes a bottom portion of one side of the sliding base fixedly connected, an upper through-type rotationally connected rotating rod, an inner end of the rotating rod fixedly connected to a toothed disc, and an outer end fixedly connected to a first turning handle;

[0013] The side close to the base is fixedly connected with and meshes with the gear disc for transmission.

[0014] As a preferred embodiment of the above technical solution, the longitudinal moving assembly includes a rectangular groove opened in the middle of the sliding base, a first threaded rod is longitudinally rotatably connected in the rectangular groove, and one end of the first threaded rod is fixedly connected to a second handle;

[0015] The outer thread sleeve of the first threaded rod is provided with a first thread sleeve, and the top of the first thread sleeve and the bottom of the upper sliding plate are fixed.

[0016] As a preferred embodiment of the above technical solution, the vertical moving assembly includes a second threaded rod rotatably connected to the inner cavity of the hollow vertical plate, and a third handle is fixedly connected to the top end of the second threaded rod;

[0017] The outer threaded sleeve of the second threaded rod is provided with a second threaded sleeve, and a connecting block is fixedly connected between the second threaded sleeve and the mounting plate;

[0018] A rectangular guide hole is provided on one side of the hollow vertical plate close to the mounting plate, and the rectangular guide hole is matched with the connecting block.

[0019] As a preferred embodiment of the above technical solution, the clamping mechanism includes a rotating member and a clamping member arranged on the top of the base;

[0020] The rotating member comprises an electric control box fixedly mounted on the top of the base, and a clamping claw disc is mounted on the output end of the electric control box;

[0021] The clamping member includes a base fixedly mounted on the top of the base, a threaded rotating rod is rotatably connected inside the base, an outer threaded sleeve of the threaded rotating rod is provided with a threaded sleeve that is laterally slidably connected inside the base, an end of the threaded sleeve away from the threaded rotating rod is rotatably connected to a clamping column, and the clamping column and the clamping claw plate are located on the same axis.

[0022] A groove engraving method is applied to the above-mentioned DC motor rotor groove engraving device, and the groove engraving method comprises the following steps:

[0023] S1. Assembly of the blade: Select a suitable notching blade as required, pass the center hole of the notching blade through the threaded column and close it to the top of the transmission shaft, and finally fix the notching blade by tightening the nut thread;

[0024] S2. Clamping and fixing the motor rotor: clamping and fixing the motor rotor by a clamping mechanism so that the motor rotor is horizontally placed above the base;

[0025] S3, grooving operation: first adjust the position of the grooving blade through the adjustment mechanism, so that the grooving blade is placed at the grooving position, and then the grooving motor drives the grooving blade to rotate, and cooperates with the adjustment mechanism to perform the grooving operation on the motor mica.

[0026] The beneficial effects of the present invention are:

[0027] The drive shaft of the present invention is designed in a conical column shape. The conical column bottom of the drive shaft can receive the driving stress of the groove carving motor more stably. The conical design is convenient for the stable transmission of stress. The pointed cone-shaped top is convenient for the concentrated transmission of stress to the groove carving blade. The diameter of the pointed cone-shaped top is smaller than the diameter of the groove carving blade, which is convenient for the installation of the groove carving blade and the subsequent groove carving operation. The groove carving blade is clamped and fixed to the top of the drive shaft through the threaded connection of the threaded column and the nut. The tightening direction of the nut thread is opposite to the driving direction of the groove carving motor. In this way, when the groove carving motor drives the groove carving blade to rotate, the groove carving blade can be rotated. When the nut is moved, the nut will further press the groove cutting blade, thereby preventing the groove cutting blade from loosening; the threaded connection between the nut and the threaded column is easy to install and disassemble, thereby facilitating the replacement and use of the groove cutting blade; a plurality of positioning protrusions are fixedly connected to the top of the transmission shaft, and a plurality of positioning holes are opened on the groove cutting blade, and the positioning holes and the positioning protrusions are adapted to each other; by providing the positioning protrusions and the positioning holes, the groove cutting blade can be positioned and fixed during assembly, thereby further improving the stability of the groove cutting blade during groove cutting, ensuring the groove cutting accuracy, and not affecting the subsequent disassembly and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1The front perspective structural diagram of the DC motor rotor groove engraving device in the embodiment is shown;

[0029] Figure 2 The figure shows a back three-dimensional structural diagram of a DC motor rotor groove engraving device in an embodiment;

[0030] Figure 3 What is shown is a three-dimensional structural schematic diagram of the notching mechanism in the DC motor rotor notching device in the embodiment.

[0031] In the figure: 10, base; 21, rotating part; 211, electric control box; 212, clamping claw plate; 22, clamping part; 221, base; 222, threaded rotating rod; 223, threaded sleeve; 224, clamping column; 31, sliding base; 32, upper sliding plate; 33, triangular connecting part; 34, hollow vertical plate; 40, notching mechanism; 41, mounting plate; 42, notching motor; 43, transmission shaft; 431, positioning protrusion; 44, threaded column; 45, nut; 46, notching blade; 461, positioning hole. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0033] Example

[0034] like Figure 1-Figure 3 As shown, a DC motor rotor notching device comprises a base 10 and a notching mechanism 40. A clamping mechanism is arranged on the top of the base 10 for horizontally clamping the motor rotor. The notching mechanism 40 comprises a notching motor 42, a nut 45 and a notching blade 46. The output shaft of the notching motor 42 is fixedly connected with a transmission shaft 43. The transmission shaft 43 is in a conical column shape and the bottom is fixed to the output shaft of the notching motor 42. The top of the transmission shaft 43 is coaxially fixedly connected with a threaded column 44 adapted to the nut 45. The notching blade 46 passes through the threaded column 44 and abuts against the top of the transmission shaft 43 and is threadedly tightened by the nut 45. The threaded tightening direction of the nut 45 is opposite to the driving direction of the notching motor 42.

[0035] The transmission shaft 43 of the present invention is designed in a conical column shape. The conical column bottom of the transmission shaft 43 can receive the driving stress of the notching motor 42 more stably. The conical design facilitates the stable transmission of stress, and the pointed cone-shaped top facilitates the concentrated transmission of stress to the notching blade 46. The diameter of the pointed cone-shaped top is smaller than the diameter of the notching blade 46, which is convenient for the installation of the notching blade 46 and the subsequent notching operation. The notching blade 46 is clamped and fixed to the top of the transmission shaft 43 through the threaded connection of the threaded column 44 and the nut 45, and the threaded tightening direction of the nut 45 is opposite to the driving direction of the notching motor 42. In this way, when the notching motor 42 drives the notching blade 46 to rotate, the nut 45 will further press the notching blade 46, thereby avoiding the notching blade 46 from being rotated. Loose; the threaded connection between the nut 45 and the threaded column 44 is easy to install and disassemble, which facilitates the replacement and use of the notching blade 46; a plurality of positioning protrusions 431 are fixedly connected to the top of the transmission shaft 43, and a plurality of positioning holes 461 are opened on the notching blade 46, and the positioning holes 461 and the positioning protrusions 431 are adapted to each other; by setting the positioning protrusions 431 and the positioning holes 461, the notching blade 46 can be positioned and fixed during assembly, thereby further improving the stability of the notching blade 46 during notching, ensuring the notching accuracy, and not affecting the subsequent disassembly and replacement; it should be noted that the protruding height of the positioning protrusion 431 and the thickness of the notching blade 46 need to be adapted to each other, so as to avoid the nut 45 not fitting the side of the notching blade 46.

[0036] An adjustment mechanism is provided on the top of the base 10 for adjusting the position of the notching blade 46 .

[0037] The notching mechanism 40 further includes a mounting plate 41 , a notching motor 42 is fixedly mounted on one side of the mounting plate 41 , and the other side of the mounting plate 41 is mounted on the adjustment mechanism. In the present invention, the mounting plate 41 is used to fix the notching motor 42 and the hollow vertical plate 34 .

[0038] The adjustment mechanism includes a sliding base 31 slidably connected to the top of the base 10 in a transverse direction, an upper sliding plate 32 is slidably connected to the top of the sliding base 31 in a longitudinal direction, a triangular connecting member 33 is fixedly connected to the top of the upper sliding plate 32, a hollow vertical plate 34 is fixedly connected to the corner side of the triangular connecting member 33, and a mounting plate 41 is vertically slidably connected to the other side of the hollow vertical plate 34;

[0039] The adjustment mechanism also includes a lateral moving component, a longitudinal moving component and a vertical moving component.

[0040] The lateral movement component includes 35 fixedly connected to the bottom of one side of the sliding base 31, a rotating rod is rotatably connected to 35, the inner end of the rotating rod is fixedly connected to a gear disk, and the outer end is fixedly connected to a first handle; 36 is fixedly connected to one side of the base 10 close to 35, and 36 is meshed with the gear disk for transmission.

[0041] The working principle of the lateral movement component is: turning the first handle drives the rotating rod and the toothed disc to rotate, and under the meshing transmission of the toothed disc and 36, 35, the sliding base 31 and the components above the sliding base 31 are driven to move horizontally as a whole; it should be noted that the grooves of the grooves are generally horizontal, and during the grooving process, it is necessary to drive 36 to move horizontally through the lateral movement component to complete the entire grooving operation.

[0042] The longitudinal moving component includes a rectangular groove opened in the middle of the sliding base 31, in which a first threaded rod is longitudinally rotatably connected, and one end of the first threaded rod is fixedly connected to a second handle; a first threaded sleeve is provided on the outer threaded sleeve of the first threaded rod, and the top of the first threaded sleeve and the bottom of the upper sliding plate 32 are fixed.

[0043] The working principle of the longitudinal movement assembly is: rotating the second handle drives the first threaded rod to rotate, and the threaded connection drives the first threaded sleeve, the upper sliding plate 32 and the components above the upper sliding plate 32 to move horizontally and longitudinally as a whole.

[0044] The vertical moving assembly includes a second threaded rod rotatably connected to the inner cavity of the hollow vertical plate 34, and the top of the second threaded rod is fixedly connected to a third handle; the outer threaded sleeve of the second threaded rod is provided with a second threaded sleeve, and a connecting block is fixedly connected between the second threaded sleeve and the mounting plate 41; a rectangular guide hole is opened on one side of the hollow vertical plate 34 close to the mounting plate 41, and the rectangular guide hole and the connecting block are adapted to each other.

[0045] The working principle of the vertical moving assembly is: rotating the third handle drives the second threaded rod to rotate, and the threaded connection is lowered, thereby driving the second threaded sleeve, the connecting block, the mounting plate 41 and other components to move horizontally and vertically as a whole.

[0046] The clamping mechanism includes a rotating member 21 and a clamping member 22 arranged on the top of the base 10; the rotating member 21 includes an electric control box 211 fixedly installed on the top of the base 10, and a clamping claw disk 212 is installed at the output end of the electric control box 211; the clamping member 22 includes a base 221 fixedly installed on the top of the base 10, and the base 221 is internally rotatably connected to a threaded rotating rod 222, and the outer threaded sleeve of the threaded rotating rod 222 is provided with a threaded sleeve 223 which is laterally slidably connected to the inside of the base 221, and the end of the threaded sleeve 223 away from the threaded rotating rod 222 is rotatably connected to a clamping column 224, and the clamping column 224 and the clamping claw disk 212 are located on the same axis.

[0047] The working principle of the clamping mechanism is: first fix one end of the motor rotor on the clamping plate 212, then rotate the threaded rotating rod 222 to drive the threaded sleeve 223, the clamping column 224 and other components to move horizontally in the direction of the clamping plate 212, and finally make the clamping column 224 clamp the other end of the motor rotor. It should be noted that when a groove needs to be engraved on the mica, the electric control box 211 drives the clamping plate 212 and the motor rotor and other components to rotate as a whole to the next groove position.

[0048] A groove engraving method is applied to the DC motor rotor groove engraving device mentioned above, and the groove engraving method comprises the following steps:

[0049] S1. Assembling the blade: Select a suitable notching blade 46 as required, pass the center hole of the notching blade 46 through the threaded column 44 and close to the top of the transmission shaft 43, and finally fix the notching blade 46 by threading the nut 45;

[0050] S2. Clamping and fixing the motor rotor: clamping and fixing the motor rotor by a clamping mechanism so that the motor rotor is horizontally placed above the base 10;

[0051] S3, notching operation: firstly adjust the position of the notching blade 46 through the adjusting mechanism, so that the notching blade 46 is placed at the notching position, and then the notching motor 42 works to drive the notching blade 46 to rotate, and cooperates with the adjusting mechanism to perform notching operation on the motor mica.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them.

Claims

1. A DC motor rotor notching device, comprising a base (10) and a notching mechanism (40), wherein a clamping mechanism is arranged on the top of the base (10) for horizontally clamping the motor rotor, and characterized in that: The notching mechanism (40) comprises a notching motor (42), a nut (45) and a notching blade (46); the output shaft of the notching motor (42) is fixedly connected to a transmission shaft (43); the transmission shaft (43) is in a conical column shape and the bottom is fixed to the output shaft of the notching motor (42); the top of the transmission shaft (43) is coaxially fixedly connected to a threaded column (44) adapted to the nut (45); the notching blade (46) passes through the threaded column (44) and abuts against the top of the transmission shaft (43) and is threadedly fastened by the nut (45); the threaded fastening direction of the nut (45) is opposite to the driving direction of the notching motor (42); An adjustment mechanism is provided on the top of the base (10) for adjusting the position of the notching blade (46).

2. The DC motor rotor notching device according to claim 1, characterized in that: A plurality of positioning protrusions (431) are fixedly connected to the top of the transmission shaft (43), and the protrusion height of the positioning protrusions (431) is adapted to the thickness of the groove cutting blade (46); The notching blade (46) is provided with a plurality of positioning holes (461), and the positioning holes (461) and the positioning protrusions (431) are matched with each other.

3. The DC motor rotor notching device according to claim 1, characterized in that: The notching mechanism (40) further comprises a mounting plate (41), the notching motor (42) being fixedly mounted on one side of the mounting plate (41), and the other side of the mounting plate (41) being mounted on the adjusting mechanism.

4. The DC motor rotor notching device according to claim 3, characterized in that: The adjustment mechanism comprises a sliding base (31) which is laterally slidably connected to the top of the base (10); the top of the sliding base (31) is longitudinally slidably connected to an upper sliding plate (32); the top of the upper sliding plate (32) is fixedly connected to a triangular connecting piece (33); the corner side of the triangular connecting piece (33) is fixedly connected to a hollow vertical plate (34); and the mounting plate (41) is vertically slidably connected to the other side of the hollow vertical plate (34); The adjustment mechanism also includes a lateral moving component, a longitudinal moving component and a vertical moving component.

5. The DC motor rotor notching device according to claim 4, characterized in that: The lateral movement assembly comprises a (35) fixedly connected to the bottom of one side of the sliding base (31), a rotating rod rotatably connected to (35), an inner end of the rotating rod fixedly connected to a toothed disc, and an outer end of the rotating rod fixedly connected to a first turning handle; The side of the base (10) close to (35) is fixedly connected with (36), and (36) is meshed with the gear disc for transmission.

6. The DC motor rotor notching device according to claim 4, characterized in that: The longitudinal moving assembly comprises a rectangular groove opened in the middle of the sliding base (31), a first threaded rod is longitudinally rotatably connected in the rectangular groove, and one end of the first threaded rod is fixedly connected to a second turning handle; A first threaded sleeve is provided on the outer threaded sleeve of the first threaded rod, and the top of the first threaded sleeve and the bottom of the upper sliding plate (32) are fixed.

7. The DC motor rotor notching device according to claim 4, characterized in that: The vertical moving assembly comprises a second threaded rod rotatably connected to the inner cavity of the hollow vertical plate (34), and a third handle is fixedly connected to the top end of the second threaded rod; The outer threaded sleeve of the second threaded rod is provided with a second threaded sleeve, and a connecting block is fixedly connected between the second threaded sleeve and the mounting plate (41); A rectangular guide hole is provided on one side of the hollow vertical plate (34) close to the mounting plate (41), and the rectangular guide hole is matched with the connecting block.

8. The DC motor rotor notching device according to claim 1, characterized in that: The clamping mechanism comprises a rotating member (21) and a clamping member (22) arranged on the top of the base (10); The rotating member (21) comprises an electric control box (211) fixedly mounted on the top of the base (10), and a clamping claw plate (212) is mounted on the output end of the electric control box (211); The clamping member (22) comprises a base (221) fixedly mounted on the top of the base (10); a threaded rotating rod (222) is rotatably connected inside the base (221); a threaded sleeve (223) is lateraly slidably connected inside the base (221) on the outer threaded sleeve of the threaded rotating rod (222); a clamping column (224) is rotatably connected to one end of the threaded sleeve (223) away from the threaded rotating rod (222); and the clamping column (224) and the clamping claw plate (212) are located on the same axis.

9. A groove engraving method, characterized in that: The groove engraving method is applied to the DC motor rotor groove engraving device described in any one of claims 1 to 8, and the groove engraving method comprises the following steps: S1. Assembling the blade: Select a suitable notching blade (46) as required, pass the center hole of the notching blade (46) through the threaded column (44) and close to the top of the transmission shaft (43), and finally fix the notching blade (46) by threading the nut (45); S2. Clamping and fixing the motor rotor: clamping and fixing the motor rotor by a clamping mechanism so that the motor rotor is horizontally placed above the base (10); S3, groove carving operation: firstly, the position of the groove carving blade (46) is adjusted by the adjusting mechanism so that the groove carving blade (46) is placed at the groove carving position, and then the groove carving motor (42) is driven to rotate the groove carving blade (46), and the adjusting mechanism is cooperated to perform the groove carving operation on the motor mica.

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