CN211791129U

CN211791129U - Direct drive motor of sewing machine

Info

Publication number: CN211791129U
Application number: CN202020428662.XU
Authority: CN
Inventors: 刘鸣; 贾志芸; 小川茂树; 朝比奈正树
Original assignee: Pegasus Tianjin Sewing Machine Co Ltd; Pegasus Sewing Machine Manufacturing Co Ltd
Current assignee: Pegasus Corp; Pegasus Tianjin Sewing Machine Co Ltd
Priority date: 2019-03-29
Filing date: 2020-03-27
Publication date: 2020-10-27
Anticipated expiration: 2030-03-27
Also published as: TW202104712A; CN111756176A; JP2020178723A

Abstract

The utility model provides a sewing machine's that even be the inside of motor main part by airtight structure, also can cool off the motor high-efficiently directly drives motor. A cover member (24) covers an opening of a sewing machine frame (11) side of the motor main body (20) and is provided with an air inlet (32). A fan (15) is mounted on a main shaft of a sewing machine, and an exhaust port (33) is arranged below the fan (15) on a sewing machine frame (11). A partition plate (35) is disposed between the sewing machine frame (11) and the motor main body (20) to separate the air inlet (32) and the air outlet (33), and the sewing machine frame (11) and the motor main body (20) are communicated through a vent hole (35a) of the partition plate (35).

Description

Direct drive motor of sewing machine

Technical Field

The present invention relates to a drive motor for a sewing machine, and more particularly, to a direct drive motor for a sewing machine in which a motor main body is mounted to a sewing machine frame.

In the present invention, the upper, lower, left and right refer to the upper, lower, left and right when the sewing machine is viewed from the front.

Background

As a direct drive motor for such a sewing machine, a motor having a sealed motor interior has been known (for example, see patent document 1).

The motor constituting the direct drive motor of the sewing machine includes a motor main body, a motor shaft, a stator, a rotor, a hand wheel, and the like, and the motor main body is opened at a mounting side mounted to a sewing machine frame, and the opening is covered with a cover member. The cover member seals the interior of the motor main body, thereby preventing foreign matters such as sewing machine needles and dust from entering the interior of the motor main body to damage or burn the motor.

Prior art documents

Patent document

Patent document 1: chinese utility model No. 206015262 (figure 1)

However, in the direct drive motor of the sewing machine of the above-mentioned conventional art, since the motor main body is hermetically sealed, there is a problem that the temperature of the motor becomes high.

In patent document 1, air is introduced from the outside of the sewing machine by a fan or a hand wheel of the sewing machine, and the motor main body is cooled by the air, but in the above-described structure, the cooling of the motor main body is insufficient, and the temperature of the motor and the sewing machine connected to the motor is increased.

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

The present invention has been made to solve the above problems, and an object of the present invention is to provide a direct drive motor of a sewing machine, which can efficiently cool a motor even if the inside of a motor main body is sealed.

Means for solving the problems

In order to achieve the above object, the utility model described in claim 1 relates to a direct drive motor for a sewing machine, including motor main body, motor shaft, stator, rotor, motor shaft and sewing machine's main shaft link and motor main body installs in the sewing machine frame, sewing machine's direct drive motor's characterized in that, motor main body is opening at the installation side to the sewing machine rack-mount, motor main body's installation side to the sewing machine rack-mount is opened the cover component and is covered, is provided with the induction port in motor main body, is provided with the gas vent in the sewing machine frame, and the fan configuration is just installed in the main shaft in the side of sewing machine frame, is provided with the partition plate between motor main body and sewing machine frame, be formed with at the partition plate with the induction port with the air vent that the mode of gas vent intercommunication formed.

Technical scheme 2's utility model on technical scheme 1's sewing machine's direct drive motor's basis, its characterized in that, the fan is centrifugal fan, motor shaft passes the air vent of partition plate.

The utility model of claim 3 is characterized in that, on the basis of the direct drive motor of the sewing machine according to claim 1 or 2, at least one groove is formed in the surface of the cover member opposed to the sewing machine frame.

Effect of the utility model

According to the utility model of claim 1, the suction port of the motor main body and the exhaust port of the sewing machine frame are partitioned by the partition plate. Further, the cold air flowing in from the air inlet is circulated on the motor main body side of the partition plate, and therefore the motor main body can be cooled efficiently.

According to the utility model of claim 2, because the air is discharged to the outside of the fan, the efficiency of exhausting from the exhaust port is improved. Further, the center side of the fan, that is, the periphery of the main shaft to which the fan is attached, is relatively negative pressure, and the periphery of the motor shaft coupled to the main shaft is also negative pressure. Since the vent hole of the partition plate is disposed through which the motor shaft passes, the air flow passing through the vent hole flows efficiently, and as a result, the efficiency of introducing air from the air inlet is improved.

According to the invention of claim 3, the surface area of the cover member is increased, and the flow of the air introduced from the air inlet is disturbed, so that the cooling efficiency of the cover member is improved, and the motor main body can be efficiently cooled.

Drawings

Fig. 1 is a sectional view of a direct drive motor of a sewing machine according to the present invention as viewed from the front.

Fig. 2 is an exploded perspective view of a main portion of the motor.

Fig. 3 is a sectional view a-a of fig. 1.

Description of reference numerals:

11 Sewing machine frame

12 spindle

13 electric motor

15 Fan

20 motor body

24 cover component

24b groove part

28 Motor shaft

32 air inlet

33 exhaust port

35 partition plate

35a vent hole

36 mounting ports.

Detailed Description

Hereinafter, an embodiment of the present invention will be described with reference to fig. 1 to 3.

As shown in fig. 1, the motor 13 constituting the direct drive motor of the sewing machine includes a motor main body 20, a motor shaft 28, a stator 21, a rotor 22, and a hand wheel 14, and the motor main body 20 is attached to the sewing machine frame 11. The motor main body 20 is opened at an installation side to be installed to the sewing machine frame 11, and a cover member 24 is provided at the opening. The cover member 24 includes a mounting portion 25, a body portion 24a, and an insertion hole 26. The body portion 24a of the cover member 24 is disposed in the motor body 20 so as to cover the opening of the motor body 20, and the mounting portion 25 is formed to extend in a horizontal direction (and in one end direction of a motor shaft 28 described later) from the peripheral end of the body portion 24a along the inner peripheral surface of the motor body 20.

As shown in fig. 1 and 2, the insertion hole 26 of the cover member 24 is formed to extend from the main body portion 24a toward the sewing machine frame 11, and a bearing 27 is fitted and fixed to the inner periphery of the insertion hole 26. An O-ring 16 is interposed between the insertion hole 26 and the bearing 27. One end of the motor shaft 28 protrudes from the motor main body 20, and the one end is fitted into the fixing portion 14a of the hand wheel 14 and fixed by the screw 18. A hollow joint 28b is formed at the other end of the motor shaft 28, and a part of the joint 28b is supported by one bearing 27. The joint 28b has two threaded

holes

28a and 28 a. The

screw holes

28a, 28a are formed inside the cover member 24 (inside the motor main body 20) and surround the motor shaft 28. The main shaft 12 of the sewing machine is fitted into the joint 28b of the motor shaft 28 and fixed by

screws

19, 19 through the

screw holes

28a, 28 a. In addition, the main shaft 12 and the motor shaft 28 are also screwed by the screw 17.

As shown in fig. 1 and 3, a rotor 22 is fixed to the outer periphery of a motor shaft 28 in the motor main body 20. The stator 21 is disposed to face the outer periphery of the rotor 22, and is fixed to the inner peripheral surface of the motor body 20 via a holder 23. In the mounting portion 25 of the cover member 24,

grooves

25b, 25b and

grooves

25c, 25c extending in the horizontal direction are alternately provided in the circumferential direction. The groove 25b penetrates only one end of the sewing machine frame 11 side, and the groove 25c penetrates both ends. The cover member 24 is fixed to the motor body 20 by screws 29 through the grooves 25b, and the holder 23 is fixed to the motor body 20 by screws 29 through the

grooves

25c, 25 c.

A through hole 20a is formed in the motor main body 20, and a through hole 25a is formed in the mounting portion 25 of the cover member 24. As shown in fig. 3, the through hole 20a and the through hole 25a are disposed so as to communicate with a position facing the screw hole 28a of the motor shaft 28. The screw 19 of the screw hole 28a is operated through the through

holes

20a and 25a, whereby the motor shaft 28 and the main shaft 12 can be fixed or released. A plug 30 is fitted into the through hole 20a to prevent foreign matter such as dust from entering the motor main body 20.

The fan 15 is disposed between the side surface of the sewing machine frame 11 and the cover member 24, and is attached to the main shaft 12. The fan 15 is a centrifugal fan and has blade portions 15a, and the blade portions 15a extend toward the motor 13 and the tip end side extends further than the center side.

An exhaust port 33 is provided below the fan 15 in the sewing machine frame 11. When the main shaft 12 and the fan 15 of the sewing machine are driven by the driving of the motor 13, air is ejected to the outside of the fan 15, and the ejected air is discharged to the outside of the sewing machine frame 11 through the air outlet 33.

As shown in fig. 1 and 2, a partition plate 35 is disposed between the motor main body 20 and the sewing machine frame 11. The partition plate 35 is a plate-like member and is attached to an attachment opening 36 of the motor main body 20 by

screws

34, 34. A circular vent hole 35a is formed in the partition plate 35, and the main shaft 12 passes through the through hole 26 of the cover member 24, the bearing 27, and the motor shaft 28 in the vent hole 35 a. The inner diameter of the vent hole 35a is larger than the outer diameter of the extended portion of the insertion hole 26.

An air inlet 32 is formed at the end of the motor body 20 on the sewing machine frame 11 side. The air inlet 32 is combined with the partition plate 35 to have a hole shape penetrating the inside and outside of the motor main body 20, and communicates with the outer surface of the cover member 24.

According to the above configuration, the air inlet 32 of the motor main body 20 and the air outlet 33 of the sewing machine frame 11 are partitioned by the partition plate 35, and the motor main body 20 and the sewing machine frame 11 communicate with each other through the air vent 35a of the partition plate 35. Accordingly, only the cool air flowing in from the air inlet 32 flows to the right side (the motor 13 side) of the partition plate, and the motor main body 20 can be efficiently cooled.

Further, since the fan 15 is a centrifugal fan, a negative pressure is generated on the center side of the fan, that is, around the main shaft 12 to which the fan 15 is attached. In this way, air is easily taken in from the air vent hole 35a similarly arranged around the main shaft, and as a result, air can be efficiently taken in from the air inlet 32.

In the present embodiment, a plurality of groove portions 24b are formed on the outer surface (the surface facing the sewing machine frame 11) of the main body portion 24a of the cover member 24. Thereby, the surface area of the outer surface of the cover member 24 is increased, and the cooling efficiency of the cover member 24 is improved by disturbing the flow of the air introduced from the suction port 32.

Claims

1. A direct drive motor of a sewing machine comprises a motor main body, a motor shaft, a stator and a rotor, wherein the motor shaft is connected with a main shaft of the sewing machine, the motor main body is arranged on a frame of the sewing machine,

the direct drive motor of the sewing machine is characterized in that,

the electric motor main body is provided with an air inlet, an air outlet, a fan, a partition plate and an air hole, wherein the air hole is formed in the partition plate in a mode of communicating with the air inlet and the air outlet.

2. The direct drive motor of a sewing machine of claim 1,

the fan is a centrifugal fan, and the motor shaft penetrates through the vent hole of the partition plate.

3. Direct drive motor of sewing machine according to claim 1 or 2,

at least one groove is formed on the surface of the cover member facing the sewing machine frame.