CN220751201U

CN220751201U - Encoder for sewing machine spindle

Info

Publication number: CN220751201U
Application number: CN202321650488.3U
Authority: CN
Inventors: 刘鸣; 刘崇宇; 姚二林
Original assignee: Pegasus Tianjin Sewing Machine Co Ltd
Current assignee: Pegasus Tianjin Sewing Machine Co Ltd
Priority date: 2023-06-27
Filing date: 2023-06-27
Publication date: 2024-04-09
Anticipated expiration: 2033-06-27

Abstract

The utility model discloses an encoder for a main shaft of a sewing machine, and belongs to the technical field of sewing machines. The encoder comprises a sewing machine main shaft, a bearing cover is rotationally connected to the sewing machine main shaft, the bearing cover is arranged on a sewing machine shell, a sealing cover is arranged on the bearing cover, the sewing machine main shaft penetrates through a sealing cavity formed by the sealing cover and the bearing cover, and an encoding component for measuring the angular displacement of the sewing machine main shaft is arranged in the sealing cavity. According to the utility model, the photoelectric encoder and the Hall sensor are arranged in the sealed cavity formed by the sealed cover and the bearing cover, so that pollutants such as cloth scraps, greasy dirt and the like are difficult to enter the sealed cavity when the sewing machine runs, and error actions of the encoder during running are reduced; the main shaft of the sewing machine is connected with the shell of the sewing machine through the bearing cover, so that the photoelectric code disc close to the bearing cover and the Hall sensor arranged on the bearing cover have good running stability and concentric running conditions, and the tightness and running stability of the encoder of the sewing machine are improved.

Description

Encoder for sewing machine spindle

Technical Field

The utility model belongs to the technical field of sewing machines, and particularly relates to an encoder for a main shaft of a sewing machine.

Background

In the current sewing machine industry, an encoder of a direct-connected servo motor of an overedger adopts a form that the encoder is arranged on the outer side of a motor stator and an photoelectric code disc is arranged on a rotor or a main shaft of the machine. The use of this design of encoder in overedger has two disadvantages:

on one hand, the servo motor is open, so that the grating is difficult to seal, pollutants such as cloth scraps, oil stains and the like easily enter the encoder to pollute the photoelectric code disc, and further, the error action is caused when the machine runs; on the other hand, the code and the photoelectric code disk are both arranged on the outer side of the motor, and the photoelectric code disk is relatively large in jumping under mechanical operation because the code and the photoelectric code disk are far away from the stable machine shell.

In conclusion, the problem of insufficient sealing and concentricity exists in the application of the existing encoder on the sewing machine, and the practical defect of the existing encoder for the sewing machine is reflected.

Disclosure of Invention

The utility model aims to: an encoder for a sewing machine spindle is provided to solve the above-mentioned problems of the prior art.

The technical scheme is as follows: the utility model provides an encoder for sewing machine main shaft, includes the sewing machine main shaft, it is connected with the bearing cap to rotate on the sewing machine main shaft, the bearing cap is installed on the sewing machine casing, install the sealed cowling on the bearing cap, the sewing machine main shaft runs through the sealed cavity that sealed cowling and bearing cap formed, be equipped with the coding assembly that is used for measuring sewing machine main shaft angular displacement in the sealed cavity.

Further, the coding assembly comprises a grating unit and a Hall sensor, the grating unit is synchronously connected to a main shaft of the sewing machine, the Hall sensor is arranged on the bearing cover, and the grating unit is matched with the Hall sensor.

Further, the sewing machine main shaft comprises an end cover section and a grating section, the end cover section and the grating section are of shaft shoulder structures, the bearing cover is connected to the end cover section, and the grating unit is connected to the grating section.

Further, the grating unit comprises a first positioning sleeve, a photoelectric code disc and a second positioning sleeve, the first positioning sleeve is arranged on the grating section, the first positioning sleeve is sleeved with the photoelectric code disc and the second positioning sleeve, and the first positioning sleeve is matched with the second positioning sleeve and used for positioning the photoelectric code disc.

Further, the bearing cover comprises a main shaft bearing and a shaft end cover plate, the inner ring of the main shaft bearing is arranged on the end cover section, the outer ring of the main shaft bearing is provided with the shaft end cover plate, the shaft end cover plate is provided with a machine body mounting hole, the shaft end cover plate is arranged on the sewing machine shell through the machine body mounting hole by using a fastener, the shaft end cover plate is provided with a grating mounting column, the Hall sensor is arranged on the shaft end cover plate through the grating mounting column by using the fastener, the shaft end cover plate is provided with a sealing cover mounting column, and the sealing cover is arranged on the shaft end cover plate through the sealing cover mounting column by using the fastener.

Further, the sealed cowling includes the cover body, the internal terminal surface of cover is equipped with the spliced pole, the spliced pole matches with sealed cowling erection column, the lateral wall of the cover body is equipped with external edge, external edge link up and form the circuit passageway with the cover body is inside, external edge inner wall is equipped with sealed edge, be equipped with the seal in the circuit passageway.

The beneficial effects are that: according to the utility model, the photoelectric encoder and the Hall sensor are arranged in the sealed cavity formed by the sealed cover and the bearing cover, and when the sewing machine runs, pollutants such as cloth scraps, greasy dirt and the like are difficult to enter the sealed cavity, so that the error action of the encoder during running is reduced; in addition, the main shaft of the sewing machine is connected with the sewing machine shell through the bearing cover, so that the bearing cover is less influenced by mechanical vibration, and the photoelectric code disc close to the bearing cover and the Hall sensor arranged on the bearing cover have good running stability and concentric running conditions; greatly improves the tightness and the operation stability of the sewing machine encoder.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is an exploded view of the present utility model;

FIG. 3 is a schematic view of the structure of the main shaft of the sewing machine according to the present utility model;

FIG. 4 is a schematic view of the structure of the bearing cap of the present utility model;

FIG. 5 is a schematic view of the seal cap of the present utility model;

fig. 6 is an enlarged view of the utility model at a in fig. 5.

The reference numerals are: 1. a sewing machine main shaft; 11. an end cap section; 12. a grating section; 2. a bearing cap; 21. a spindle bearing; 22. a shaft end cover plate; 23. a grating mounting column; 24. a fuselage mounting hole; 25. a seal cap mounting post; 3. a hall sensor; 4. a grating unit; 41. positioning a first sleeve; 42. a photoelectric code wheel; 43. positioning a sleeve II; 5. a sealing cover; 51. a cover body; 52. a connecting column; 53. an external edge; 54. and a sealing edge.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present utility model. It will be apparent, however, to one skilled in the art that the utility model may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the utility model.

As shown in fig. 1-2, an encoder for a sewing machine spindle comprises a sewing machine spindle 1, wherein a bearing cover 2 is rotatably connected to the sewing machine spindle 1, the bearing cover 2 is arranged on a sewing machine shell, a sealing cover 5 is arranged on the bearing cover 2, the sewing machine spindle 1 penetrates through a sealing cavity formed by the sealing cover 5 and the bearing cover 2, and a coding component for measuring the angular displacement of the sewing machine spindle 1 is arranged in the sealing cavity.

The coding assembly is arranged in the sealing cavity formed by the sealing cover and the bearing cover, so that the normal operation of the encoder is prevented from being interfered by pollutants such as cloth scraps, greasy dirt and the like, and the installation of the coding assembly and the sewing machine shell are in a fixed connection relationship, so that the influence of mechanical vibration on the coding assembly is small, and the tightness and the operation stability of the sewing machine encoder are improved.

As shown in fig. 1-2, the encoding assembly comprises a grating unit 4 and a hall sensor 3, wherein the grating unit 4 is synchronously connected to the main shaft 1 of the sewing machine, the hall sensor 3 is arranged on the bearing cover 2, and the grating unit 4 is matched with the hall sensor 3. When the main shaft 1 of the sewing machine works, the grating unit 4 moves synchronously with the main shaft 1 of the sewing machine, the Hall sensor 3 transmits, receives and reads photoelectric signals passing through the grating unit 4, converts the angular displacement of the main shaft 1 of the sewing machine into electric signals and transmits the electric signals to the industrial control end of the sewing machine.

As shown in fig. 3, the main shaft 1 of the sewing machine comprises an end cover section 11 and a grating section 12, the end cover section 11 and the grating section 12 are of shaft shoulder structures, the bearing cover 2 is connected to the end cover section 11, and the grating unit 4 is connected to the grating section 12. The main shaft 1 of the sewing machine is provided with the grating section 12 for providing a mounting station for the grating unit 4, the end cover section 11 is provided for forming a rotary connection station with the bearing cover 2, the positions of the end cover section 11 and the grating section 12 determine the mounting position and connection relation between the coding assembly and the sewing machine shell, and the key that the grating unit 4 and the Hall sensor 3 keep stable concentric movement.

As shown in fig. 2-3, the grating unit 4 includes a first positioning sleeve 41, an optical code disc 42 and a second positioning sleeve 43, the first positioning sleeve 41 is mounted on the grating section 12, the first positioning sleeve 41 is sleeved with the optical code disc 42 and the second positioning sleeve 43, and the first positioning sleeve 41 is matched with the second positioning sleeve 43 for positioning the optical code disc 42. The photoelectric code disk 42 is clamped and positioned by the first positioning sleeve 41 and the second positioning sleeve 43, so that the photoelectric code disk 42 is not in direct contact with the main shaft 1 of the sewing machine, and the influence of the assembly grating unit 4 on the photoelectric code disk 42 is reduced.

Further, the bearing cover 2 comprises a main shaft bearing 21 and a shaft end cover plate 22, an inner ring of the main shaft bearing 21 is installed on the end cover section 11, a shaft end cover plate 22 is installed on an outer ring of the main shaft bearing 21, a machine body installation hole 24 is formed in the shaft end cover plate 22, the shaft end cover plate 22 is installed on a sewing machine shell through the machine body installation hole 24 through a fastening piece, a grating installation column 23 is arranged on the shaft end cover plate 22, the Hall sensor 3 is installed on the shaft end cover plate 22 through the grating installation column 23 through the fastening piece, a sealing cover installation column 25 is arranged on the shaft end cover plate 22, and the sealing cover 5 is installed on the shaft end cover plate 22 through the sealing cover installation column 25 through the fastening piece. The bearing cover 2 is movably connected with the main shaft 1 of the sewing machine, is fixedly connected with the sewing machine shell, provides a mounting station for the Hall sensor 3, forms a sealing chamber by matching with the sealing cover 5, and is a key part for providing sealing and stable operation for the encoder of the sewing machine.

Further, the sealing cover 5 comprises a cover body 51, a connecting column 52 is arranged on the inner end face of the cover body 51, the connecting column 52 is matched with the sealing cover mounting column 25, an external edge 53 is arranged on the side wall of the cover body 51, the external edge 53 is communicated with the inside of the cover body 51 and forms a circuit channel, a sealing edge 54 is arranged on the inner wall of the external edge 53, and sealing materials are arranged in the circuit channel. The external edge 53 extends the line channel, provides a setting station for the sealing edge 54, and after the rubber sealing material is filled into the line channel, the sealing material and the sealing edge 54 form a curved sealing route, so that the sealing performance of the sealing cavity is ensured.

When the utility model is used, the rotation of the main shaft 1 of the sewing machine brings the photoelectric code disc 42 to synchronously rotate, when the photoelectric code disc 42 rotates, the through and dark score lines matched with the Hall sensor 3 alternately appear, the Hall sensor 3 transmits, receives and reads the photoelectric signal passing through the grating unit 4, then converts the angular displacement of the main shaft 1 of the sewing machine into an electric signal and transmits the electric signal to the industrial control end of the sewing machine. When the coding assembly works, the sealing chamber formed by the bearing cover 2 and the sealing cover 5 can effectively prevent pollutants such as cloth scraps, greasy dirt and the like from entering the sealing chamber, so that the signal output is prevented from being greatly reduced due to grating pollution, and the operation of cleaning the photoelectric encoder 42 by dipping absorbent cotton in absolute alcohol is reduced; in addition, hall sensor 3 passes through bearing cap 2 indirect fixed mounting on the sewing machine casing, receives mechanical vibration influence less, and photoelectric encoder 42 installs the one end that is close to the sewing machine casing at sewing machine main shaft 1, receives mechanical vibration not too big yet, and photoelectric encoder 42 and hall sensor 3's mounted position are favorable to both maintaining concentric operation, have guaranteed the effective steady operation of encoder.

The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the specific details of the above embodiments, and various equivalent changes can be made to the technical solutions of the present utility model within the scope of the technical concept of the present utility model, and these equivalent changes all fall within the scope of the present utility model.

Claims

1. The encoder for the sewing machine main shaft comprises the sewing machine main shaft (1), and is characterized in that a bearing cover (2) is rotationally connected to the sewing machine main shaft (1), the bearing cover (2) is arranged on a sewing machine shell, a sealing cover (5) is arranged on the bearing cover (2), the sewing machine main shaft (1) penetrates through a sealing cavity formed by the sealing cover (5) and the bearing cover (2), and a coding component for measuring the angular displacement of the sewing machine main shaft (1) is arranged in the sealing cavity;

the encoding assembly comprises a grating unit (4) and a Hall sensor (3), wherein the grating unit (4) is synchronously connected to a main shaft (1) of the sewing machine, the Hall sensor (3) is arranged on a bearing cover (2), and the grating unit (4) is matched with the Hall sensor (3);

the main shaft (1) of the sewing machine comprises an end cover section (11) and a grating section (12), wherein the end cover section (11) and the grating section (12) are of shaft shoulder structures, the bearing cover (2) is connected to the end cover section (11), and the grating unit (4) is connected to the grating section (12).

2. An encoder for a sewing machine spindle according to claim 1, characterized in that the grating unit (4) comprises a first positioning sleeve (41), a photoelectric encoder (42) and a second positioning sleeve (43), the first positioning sleeve (41) is mounted on the grating section (12), the first positioning sleeve (41) is sleeved with the photoelectric encoder (42) and the second positioning sleeve (43), and the first positioning sleeve (41) is matched with the second positioning sleeve (43) for positioning the photoelectric encoder (42).

3. An encoder for a sewing machine spindle according to claim 1, characterized in that the bearing cap (2) comprises a spindle bearing (21) and a shaft end cover plate (22), the inner ring of the spindle bearing (21) is mounted on the end cap section (11), the outer ring of the spindle bearing (21) is mounted with the shaft end cover plate (22), the shaft end cover plate (22) is provided with a body mounting hole (24), the shaft end cover plate (22) is mounted on the sewing machine casing through the body mounting hole (24) by means of a fastener, the shaft end cover plate (22) is provided with a grating mounting column (23), the hall sensor (3) is mounted on the shaft end cover plate (22) through the grating mounting column (23) by means of a fastener, the shaft end cover plate (22) is provided with a seal cover mounting column (25), and the seal cover (5) is mounted on the shaft end cover plate (22) through the seal cover mounting column (25) by means of a fastener.

4. An encoder for a sewing machine spindle according to claim 3, characterized in that the sealing cover (5) comprises a cover body (51), a connecting column (52) is arranged on the inner end surface of the cover body (51), the connecting column (52) is matched with the sealing cover mounting column (25), an external edge (53) is arranged on the side wall of the cover body (51), the external edge (53) is communicated with the inside of the cover body (51) and forms a line channel, a sealing edge (54) is arranged on the inner wall of the external edge (53), and sealing materials are arranged in the line channel.