CN210796884U

CN210796884U - Mounting structure of no shell motor on industrial sewing machine

Info

Publication number: CN210796884U
Application number: CN201921680783.7U
Authority: CN
Inventors: 刘宇强
Original assignee: Zhejiang Zobow Mechanical and Electrical Tech Co Ltd
Current assignee: Zhejiang Zobow Mechanical and Electrical Tech Co Ltd
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2020-06-19
Anticipated expiration: 2029-10-09

Abstract

The utility model belongs to the technical field of sewing machine, a mounting structure of no shell motor on industrial sewing machine is related to. The stator and rotor concentricity of the existing shell-free motor device is low, and the working noise is large. The sewing machine comprises a machine shell and a main shaft, wherein the shell-free motor comprises a stator and a rotor, the mounting structure comprises a circular mounting groove formed in one end of the machine shell, the main shaft is rotatably inserted into the mounting groove, the central axis of the main shaft is coincident with the central line of the mounting groove, and an annular step groove is formed in the inner wall of a groove opening of the mounting groove; one side of the stator is close to the outer peripheral surface and is provided with an annular spigot matched with the step groove, one end of the stator is inserted into the mounting groove, the side wall of the step groove is attached to the side wall of the annular spigot, the rotor is sleeved on the main shaft, the stator is sleeved on the periphery of the rotor, and the stator is fixedly connected with the end surface of the shell through a fixing bolt. This mounting structure has guaranteed to have higher concentricity after no shell motor's stator and the installation of rotor, has improved the leakproofness simultaneously, has reduced the noise.

Description

Mounting structure of no shell motor on industrial sewing machine

Technical Field

The utility model belongs to the technical field of sewing machine, a mounting structure of no shell motor on industrial sewing machine is related to.

Background

The noise that its self produced comes from two aspects during industrial sewing machine operation, firstly the sewing machine produces the mechanical noise by mechanisms and parts such as main shaft, bearing, tooth raising mechanism, gear during operation, secondly the motor noise, the shellless motor is because there is not the bearing, the noise during its operation is electromagnetic noise mainly, a main factor that influences electromagnetic noise is whether fixed, rotor installation is concentric, stator and rotor eccentricity can produce great low order radial force, the low order radial force is very big to the electromagnetic noise of motor, stator and rotor concentricity is worse, the electromagnetic noise that the motor produced is bigger.

Chinese patent (publication No. CN 203700744U; publication No. 2014-07-09) discloses a shell-less motor with a direct-drive structure for a sewing machine, the shell-less motor with the direct-drive structure for the sewing machine comprises a motor stator and a rotor motor stator, axial fixing holes are formed in the motor stator and the rotor motor stator, a bolt penetrates through the fixing holes to fix the motor stator on a sewing machine shell, and a shaft hole for inserting and fixing a sewing machine spindle is formed in the middle of the rotor.

The motor without a casing in the patent document is not convenient enough in assembly, and the noise is still large in the using process, which is not beneficial to creating a good working environment.

Disclosure of Invention

The utility model provides an industrial sewing machine goes up mounting structure of no shell motor according to the above-mentioned problem that prior art exists. The utility model discloses the technical problem that will solve is: how to improve the concentricity of a stator and a rotor on a shell-less motor and reduce the noise when the shell-less motor works.

The purpose of the utility model can be realized through the following technical scheme:

the mounting structure of the shell-less motor on the industrial sewing machine, the sewing machine includes chassis and main axis, the shell-less motor includes stator and rotor, characterized by that, the said mounting structure includes the annular mounting groove that one end of chassis offers, the said main axis can be rotated and inserted and set up in the said mounting groove and the central line of the said main axis coincides with central line of the said mounting groove, there are annular step grooves on the notch inboard wall of the said mounting groove; one side of the stator is close to the outer peripheral surface and has with step groove matched with annular tang, stator one end is inserted in the mounting groove just the lateral wall in step groove with the lateral wall of annular tang laminates mutually, the rotor cover is established on the main shaft, the stator cover is established the rotor is peripheral, the stator with the terminal surface of casing links firmly mutually through fixing bolt.

The working principle is as follows: during assembly, the rotor is sleeved on the main shaft to enable the rotor and the main shaft to be coaxially arranged, then the stator is sleeved on the rotor, and the stator and the rotor form radial limit through the matching of the annular seam allowance arranged on the periphery of the stator and the annular step groove of the groove opening of the mounting groove on the casing, so that the concentricity of the stator and the rotor is ensured, and the stator and the casing are fixedly connected through the fixing bolt; the main shaft is inserted in the mounting groove of the shell, and finally the motor stator and the rotor which are fixedly assembled are arranged concentrically with the main shaft. The mounting structure ensures the mounting stability of the shell-less motor, improves the concentricity of the stator, the rotor and the main shaft, and reduces the noise generated by the motor.

In the mounting structure of the shell-less motor on the industrial sewing machine, a plurality of connecting bosses are distributed on the peripheral surface of the stator at intervals along the circumferential direction of the stator, and a sealing end cover is fixedly arranged at the other end of the stator; the peripheral surface of the sealing end cover is provided with connecting parts which are in one-to-one correspondence with the connecting bosses and are fixedly connected with the corresponding connecting bosses; the fixing bolt is arranged on the connecting boss. The stator and the sealing end cover are fixedly connected through the connecting boss and the connecting part, so that the sealing performance of the shell-less motor is guaranteed, and the noise of the motor is reduced.

In the mounting structure of the shell-less motor on the industrial sewing machine, the number of the connecting bosses is at least four, the connecting bosses are uniformly distributed at intervals along the circumferential direction of the stator, and each connecting boss is provided with a first connecting hole and a second connecting hole; and a connecting part of the sealing end cover is provided with a third connecting hole, the fixing bolt penetrates through the first connecting hole and is in threaded connection with the end face of the casing, and the sealing end cover is provided with a connecting bolt which penetrates through the third connecting hole and the second connecting hole and is in threaded connection with the end face of the casing. The connecting boss, the connecting part and the casing are fixedly connected through the hole shaft by the connecting bolt, and the connecting boss and the casing are fixedly connected through the hole shaft by the fixing bolt, so that the sealing effect of the sealing end cover on the shell-free motor is ensured, and the shell-free motor is stably connected to the casing.

In the mounting structure of the shell-less motor on the industrial sewing machine, the stator comprises an iron core formed by laminating a plurality of silicon steel sheets and a framework ring sleeved outside the iron core, the annular spigot and the connecting boss are positioned on the framework ring, and the annular spigot is an annular groove formed in the peripheral surface of one end of the framework ring. The connecting boss is arranged on the framework ring, so that the stator is conveniently and fixedly connected with the shell and the sealing end cover; the annular spigot is matched with the step groove on the mounting groove, so that the concentricity of the stator and the rotor in the shell-less motor is improved.

At foretell industrial sewing machine go up mounting structure of no shell motor, end cover includes end panel and annular slab, the end panel is located the tip of stator, the annular slab cover is established around the outer periphery of stator, the outside of annular slab seted up with connect the breach of boss one-to-one, it establishes to connect the boss inlay in the breach. The annular plate on the sealing end cover is sleeved on the periphery of the stator, so that the sealing property of the sealing end cover is ensured; the connecting boss penetrates through the notch to correspond to the connecting part, so that the sealing end cover is conveniently and fixedly connected with the stator.

In the mounting structure of the shell-less motor on the industrial sewing machine, the outer peripheral surface of the main shaft is provided with the limiting plane, the middle part of the rotor is provided with the shaft sleeve, the shaft sleeve is sleeved on the main shaft, the outer peripheral surface of the shaft sleeve is provided with the threaded hole for screwing the locking screw, and the threaded hole corresponds to the limiting plane. A shaft sleeve is arranged between the main shaft and the rotor and fixedly connected with the main shaft through a threaded hole and a locking screw which are arranged on the shaft sleeve, so that the stability of the main shaft in working is ensured.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses utilize the annular tang of design on no shell motor stator and the step groove cooperation on the mounting groove, when guaranteeing no shell motor equipment, stator and rotor can coaxial setting to avoid because extra motor noise that stator and rotor installation decentraction brought and other motor performance weakening problems that cause by stator and rotor decentraction.

2. The utility model discloses utilize the annular plate on end cover and the end cover, make the no shell motor on installing industrial sewing machine on the inside seal structure that forms of back, mechanical noise and motor noise that the main shaft axial transmitted when effectively keeping apart the sewing machine operation come.

3. The utility model discloses well end cap and stator utilize connecting portion and the connection boss on it to link firmly through the hole axle cooperation to end cap and stator all link firmly with the casing, can effectively keep the steadiness of no shell motor installation, and end cap's sealed effect.

4. The utility model provides a no shell motor need not guarantee stator and rotor concentricity according to the order of installing the stator earlier and then installing the rotor when the installation.

Drawings

FIG. 1 is a schematic view of a mounting structure of a non-housing motor on an industrial sewing machine.

Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

FIG. 3 is a schematic view of a partially enlarged structure at B in FIG. 1

Fig. 4 is a schematic perspective view of the housing of the industrial sewing machine.

Fig. 5 is a schematic perspective view of a first shell-less motor.

Fig. 6 is a schematic perspective view of a second brushless motor.

In the figure, 1, a housing; 2. a main shaft; 3. a stator; 4. a rotor; 5. mounting grooves; 6. a step groove; 7. an annular spigot; 8. fixing the bolt; 9. connecting the bosses; 10. sealing the end cap; 11. a connecting portion; 12. a first connecting hole; 13. a second connecting hole; 14. connecting a hole III; 15. a connecting bolt; 16. an iron core; 17. a skeleton ring; 18. an end panel; 19. an annular plate; 20. a notch; 21. a limiting plane; 22. a shaft sleeve; 23. locking the screw; 24. a threaded bore.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further explain the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 6, the sewing machine comprises a machine shell 1 and a main shaft 2, the shell-less motor comprises a stator 3 and a rotor 4, the mounting structure comprises a circular mounting groove 5 formed at one end of the machine shell 1, the main shaft 2 is rotatably inserted in the mounting groove 5, the central axis of the main shaft 2 coincides with the central line of the mounting groove 5, and an annular step groove 6 is formed on the inner wall of the notch of the mounting groove 5; one side of the stator 3 is provided with an annular spigot 7 which is matched with the step groove 6 and is close to the peripheral surface, one end of the stator 3 is inserted into the mounting groove 5, the side wall of the step groove 6 is attached to the side wall of the annular spigot 7, the rotor 4 is sleeved on the main shaft 2, the stator 3 is sleeved on the periphery of the rotor 4, and the stator 3 is fixedly connected with the end surface of the casing 1 through a fixing bolt 8. The stator 3 comprises an iron core 16 formed by laminating a plurality of silicon steel sheets and a framework ring 17 sleeved outside the iron core 16, the annular spigot 7 and the connecting boss 9 are positioned on the framework ring 17, and the annular spigot 7 is an annular groove formed in the peripheral surface of one end of the framework ring 17. The outer peripheral surface of the main shaft 2 is provided with a limiting plane 21, the middle part of the rotor 4 is provided with a shaft sleeve 22, the shaft sleeve 22 is sleeved on the main shaft 2, the outer peripheral surface of the shaft sleeve 22 is provided with a threaded hole 24 for screwing a locking screw 23, and the threaded hole 24 corresponds to the limiting plane 21. The shell-less motor is arranged in the mounting groove 5, the step groove 6 on the framework ring 17 of the stator 3 is matched with the annular spigot 7 on the mounting groove, the spindle 2 is sleeved with the spindle sleeve 22, the spindle sleeve 22 is sleeved with the rotor 4, the stator 3 is sleeved on the rotor 4, and the fixing screw 23 penetrates through the threaded hole 24 on the spindle sleeve 22 to fix the spindle sleeve 22 and the spindle 2. The concentric arrangement of the stator 3 and the rotor 4 and the stable installation of the main shaft 2 and the shell-less motor are ensured.

As shown in fig. 3, 5 and 6, a plurality of connecting bosses 9 are distributed on the outer circumferential surface of the stator 3 at intervals along the circumferential direction of the stator 3, and a sealing end cover 10 is fixedly arranged at the other end of the stator 3; the peripheral surface of the sealing end cover 10 is provided with connecting parts 11 which are in one-to-one correspondence with the connecting bosses 9, and the connecting parts 11 are fixedly connected with the corresponding connecting bosses 9; the fixing bolt 8 is arranged on the connecting boss 9. The number of the connecting bosses 9 is at least four, the connecting bosses are uniformly distributed at intervals along the circumferential direction of the stator 3, and each connecting boss 9 is provided with a first connecting hole 12 and a second connecting hole 13; and a connecting part 11 of the sealing end cover 10 is provided with a connecting hole III 14, the fixing bolt 8 penetrates through the connecting hole I12 and is screwed on the end surface of the machine shell 1, and the sealing end cover 10 is provided with a connecting bolt 15 which penetrates through the connecting hole III 14 and the connecting hole II 13 and is screwed on the end surface of the machine shell 1. The end cover 10 comprises an end plate 18 and a ring plate 19, the end plate 18 is located at the end of the stator 3, the ring plate 19 is sleeved on the outer periphery of the stator 3, notches 20 corresponding to the connecting bosses 9 one by one are formed in the outer side of the ring plate 19, and the connecting bosses 9 are embedded in the notches 20. The connecting bolt 15 fixedly connects the stator 3 and the sealing end cover 10 through a connecting hole II 13 on the connecting boss 9 and a connecting hole III 14 on the connecting part 11, and is fixedly connected with the machine shell 1; the fixing bolt 8 fixedly connects the stator 3 with the casing 1 through a first connecting hole 12 on the stator 3; the stator 3 engages on the annular plate 19. The stator 3, the sealing end cover 10 and the shell are fixedly connected, the sealing performance of the shell-free motor is improved, and noise is reduced.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although more 1, a housing is used herein; 2. a main shaft; 3. a stator; 4. a rotor; 5. mounting grooves; 6. a step groove; 7. an annular spigot; 8. fixing the bolt; 9. connecting the bosses; 10. sealing the end cap; 11. a connecting portion; 12. a first connecting hole; 13. a second connecting hole; 14. connecting a hole III; 15. a connecting bolt; 16. an iron core; 17. a skeleton ring; 18. an end panel; 19. an annular plate; 20. a notch; 21. a limiting plane; 22. a shaft sleeve; 23. locking the screw; 24. threaded holes, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims

1. The mounting structure of the shell-free motor on the industrial sewing machine comprises a machine shell (1) and a main shaft (2), wherein the shell-free motor comprises a stator (3) and a rotor (4), and is characterized in that the mounting structure comprises a circular mounting groove (5) formed in one end of the machine shell (1), the main shaft (2) can be rotatably inserted into the mounting groove (5), the central axis of the main shaft (2) is coincident with the central line of the mounting groove (5), and an annular step groove (6) is formed in the inner wall of a notch of the mounting groove (5); one side of stator (3) be close to the outer peripheral face have with step groove (6) matched with annular tang (7), stator (3) one end is inserted just in mounting groove (5) the lateral wall of step groove (6) with the lateral wall of annular tang (7) is laminated mutually, rotor (4) cover is established on main shaft (2), stator (3) cover is established rotor (4) are peripheral, stator (3) with the terminal surface of casing (1) links firmly mutually through fixing bolt (8).

2. The mounting structure of the shell-less motor on the industrial sewing machine according to claim 1, characterized in that a plurality of connecting bosses (9) are distributed on the peripheral surface of the stator (3) at intervals along the circumferential direction of the stator (3), and a sealing end cover (10) is fixedly arranged at the other end of the stator (3); the peripheral surface of the sealing end cover (10) is provided with connecting parts (11) which are in one-to-one correspondence with the connecting bosses (9), and the connecting parts (11) are fixedly connected with the corresponding connecting bosses (9); the fixing bolt (8) is arranged on the connecting boss (9).

3. The mounting structure of the shell-less motor on the industrial sewing machine according to claim 2, characterized in that the number of the connecting bosses (9) is at least four and is evenly distributed along the circumference of the stator (3) at intervals, and each connecting boss (9) is provided with a first connecting hole (12) and a second connecting hole (13); a connecting hole III (14) is formed in a connecting portion (11) of the sealing end cover (10), the fixing bolt (8) penetrates through the connecting hole I (12) and is in threaded connection with the end face of the casing (1), and a connecting bolt (15) which penetrates through the connecting hole III (14) and the connecting hole II (13) and is in threaded connection with the end face of the casing (1) is arranged on the sealing end cover (10).

4. The mounting structure of the shell-less motor on the industrial sewing machine according to claim 2 or 3, wherein the stator (3) comprises an iron core (16) formed by laminating a plurality of silicon steel sheets and a skeleton ring (17) sleeved outside the iron core (16), the annular spigot (7) and the connecting boss (9) are positioned on the skeleton ring (17), and the annular spigot (7) is an annular groove formed on the outer peripheral surface of one end of the skeleton ring (17).

5. The mounting structure of the shell-less motor on the industrial sewing machine according to claim 3, characterized in that the end cover (10) comprises an end plate (18) and a ring plate (19), the end plate (18) is located at the end of the stator (3), the ring plate (19) is sleeved on the outer periphery of the stator (3), notches (20) corresponding to the connecting bosses (9) one by one are opened at the outer side of the ring plate (19), and the connecting bosses (9) are embedded in the notches (20).

6. The mounting structure of the non-shell motor on the industrial sewing machine according to claim 3, characterized in that a limiting plane (21) is arranged on the outer peripheral surface of the main shaft (2), a shaft sleeve (22) is arranged in the middle of the rotor (4), the shaft sleeve (22) is sleeved on the main shaft (2), a threaded hole (24) for screwing a locking screw (23) is arranged on the outer peripheral surface of the shaft sleeve (22), and the threaded hole (24) corresponds to the limiting plane (21).