CN217026343U

CN217026343U - Sewing machine with needle bar cleaning mechanism

Info

Publication number: CN217026343U
Application number: CN202123007538.XU
Authority: CN
Inventors: 毕兴国; 黄西良
Original assignee: Zhejiang Maqi Sewing Machine Co Ltd
Current assignee: Zhejiang Maqi Sewing Machine Co Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-07-22
Anticipated expiration: 2031-11-30

Abstract

The utility model relates to the technical field of sewing equipment, and discloses a sewing machine with a needle bar cleaning mechanism, which comprises a machine head and a needle bar, wherein the needle bar is rotatably arranged on the machine head; the lower end of the machine head is provided with a shaft hole, and the rotating part can rotatably penetrate through the shaft hole; the air inlet connector is further arranged at the lower end of the machine head, the air inlet channel is formed in the lower end of the machine head and connected with the air inlet channel, and the air inlet channel is communicated with the shaft hole. According to the utility model, the air inlet channel is arranged at the machine head part, and the vent hole is arranged on the needle rod sleeve, so that the inside of the needle rod sleeve is communicated with the exhaust channel, air enters the inside of the needle rod sleeve, the needle rod is blown, impurities such as thread hair and the like are prevented from entering the needle rod sleeve, and the needle rod is prevented from being stuck or bitten by long-time work.

Description

Sewing machine with needle bar cleaning mechanism

Technical Field

The utility model relates to the technical field of sewing equipment, in particular to a sewing machine with a needle bar cleaning mechanism.

Background

The difference between the rotary needle bar template machine and the normal-scale template machine mainly lies in that the needle bar can rotate according to the trend of the suture in the sewing process, so that the suture is always in a forward sewing state without reverse sewing, the thread breakage rate is greatly reduced, and the consistency of stitches is ensured. The main part of the rotary needle bar is different from the needle bar of a common sewing machine, and two long planes are processed on the outer circular surface of the rotary needle bar and are used for matching with other parts to limit the rotation of the parts. Originally, the needle bar is tightly matched with the needle bar sleeve, but due to the structural particularity of the needle bar, a large gap is formed between the surface processing plane of the needle bar and the inner hole of the needle bar sleeve, and the gap is easy to allow sundries such as thread and hair to be brought into the needle bar sleeve by the up-and-down movement of the needle bar in the sewing process. For example, the chinese utility model patent (application No. CN201922486403.2) discloses a needle bar blowing device, which comprises a housing fixedly arranged at the bottom of a needle bar rotary template machine, the bottom of the housing is provided with a first and a second hole for respectively abdicating the needle bar and the middle presser foot bar of the needle bar rotary template machine, the side wall of the housing is provided with: an air inlet hole connected with an air blowing member for blowing air into the housing; and the air outlet is used for discharging the air with the yarn hair. The blowing device in the patent has weak blowing precision, so that the cleaning effect on the needle rod is poor.

Disclosure of Invention

The present invention addresses the above-described shortcomings in the prior art and provides a sewing machine having a needle bar cleaning mechanism.

In order to solve the technical problems, the utility model is solved by the following technical scheme:

a sewing machine with a needle bar cleaning mechanism comprises a machine head and a needle bar, wherein the needle bar is rotatably arranged on the machine head, the lower end of the needle bar is sleeved with a rotating part, and the rotating part and the needle bar synchronously rotate;

the lower end of the machine head is provided with a shaft hole, and the rotating part can rotatably penetrate through the shaft hole;

the air inlet connector is further arranged at the lower end of the machine head, the air inlet channel is formed in the lower end of the machine head and connected with the air inlet channel, and the air inlet channel is communicated with the shaft hole.

Preferably, the needle rod is provided with a plane section, the outer surface of the plane section is provided with planes symmetrically arranged, the rotating part is sleeved on the plane section, and the rotating part is abutted against the planes through a positioning pin.

Preferably, the needle bar rotating device further comprises a worm arranged on the machine head, the rotating part comprises a worm wheel and a needle bar sleeve, the worm wheel is meshed with the worm wheel and drives the worm wheel to rotate, the worm wheel and the needle bar sleeve are concentrically arranged and are of an integrated structure, and the needle bar sleeve is fixedly arranged below the worm wheel.

Preferably, the needle bar sleeve further comprises bearings, the bearings are fixedly installed in the shaft holes, gaps are reserved among the bearings, and the needle bar sleeve is arranged in the bearings in a penetrating mode.

Preferably, the outer wall of the needle rod sleeve is provided with a through hole, the through hole is communicated with the air inlet channel through a gap between the bearings, and the through hole is communicated with a gap between the plane and the needle rod sleeve.

Preferably, the through hole comprises a first through hole and a second through hole, and the first through hole and the second through hole are symmetrically arranged on the needle rod sleeve.

Preferably, the worm wheel is provided with a positioning hole communicated with the interior of the worm wheel, the positioning pin is fixedly arranged in the positioning hole in a penetrating mode, and the inner end face of the positioning pin is abutted to the plane.

Preferably, the air inlet channel comprises a first channel and a second channel, the first channel is transversely arranged on the machine head, one end of the first channel is communicated with the shaft hole, a sealing screw penetrates through the other end of the first channel fixedly, the second channel is vertically arranged on the machine head, the upper end of the second channel is communicated with the first channel, and the lower end of the second channel is connected with the air inlet connector.

Due to the adoption of the technical scheme, the utility model has the remarkable technical effects that: the air inlet channel is arranged at the machine head part, and the air vent is arranged on the needle rod sleeve, so that the inside of the needle rod sleeve is communicated with the exhaust channel, air enters the inside of the needle rod sleeve to blow the needle rod, and impurities such as thread hair and the like are prevented from entering the needle rod sleeve, and the needle rod is prevented from being stuck or bitten by the thread hair or the like after working for a long time.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic view of the structure of the handpiece.

Fig. 3 is a schematic view of the internal structure of the air blowing mechanism.

Fig. 4 is a partially enlarged schematic view of the portion M in fig. 3.

Fig. 5 is an exploded view of the needle bar and the rotating portion.

The names of the parts indicated by the numerical references in the drawings are as follows: 1-machine head, 101-shaft hole, 2-needle rod, 201-plane section, 2011-plane, 3-rotating part, 301-worm wheel, 3011-positioning hole, 302-needle rod sleeve, 3021-through hole, 30211-through hole I, 30212-through hole II, 4-air inlet joint, 5-air inlet channel, 501-channel I, 502-channel II, 6-positioning pin, 7-worm, 8-bearing, and 9-clearance.

Detailed Description

The utility model is described in further detail below with reference to the figures and examples.

Example 1

A sewing machine with a needle bar cleaning mechanism, as shown in fig. 1 to 5, comprises a machine head 1 and a needle bar 2, wherein the needle bar 2 is rotatably arranged on the machine head 1, a rotating part 3 is sleeved at the lower end of the needle bar 2, and the rotating part 3 and the needle bar 2 synchronously rotate; the lower end of the machine head 1 is provided with a shaft hole 101, and the rotating part 3 is rotatably arranged in the shaft hole 101 in a penetrating way; the gas-liquid mixing machine head further comprises a gas inlet joint 4, a gas inlet channel 5 is further formed in the lower end of the machine head 1, the gas inlet joint 4 is connected with the gas inlet channel 5, and the gas inlet channel 5 is communicated with the shaft hole 101. When the sewing machine operates, the air inlet joint 4 is externally connected with an air source and enters the shaft hole 101 through the air inlet channel 5, air is blown into the shaft hole 101, and therefore the phenomenon that woolen yarn impurities enter the shaft hole 101 to cause the needle bar to be clamped or abraded can be avoided.

Be equipped with plane section 201 on needle bar 2, be equipped with the plane 2011 that the symmetry set up on the surface of plane section 201, plane 2011 extends the setting from top to bottom, and on plane section 201 was located to the cover of rotation portion 3, rotation portion 3 was offset with plane 2011 through locating pin 6. The positioning pin 6 limits the relative rotation of the rotating part 3 and the needle bar 2, so that the rotating part 3 drives the needle bar 2 to synchronously rotate when rotating, and the stability of the needle bar 2 during rotating is improved.

Still including installing in the worm 7 of aircraft nose 1, the portion 3 that rotates includes worm wheel 301 and needle bar cover 302, worm 7 meshes with worm wheel 301 and drives worm wheel 301 and rotate, and worm wheel 301 and needle bar cover 302 concentric setting and formula structure as an organic whole, and needle bar cover 302 sets up the below in worm wheel 301 fixedly. The worm 7 drives the worm wheel 301 to rotate and drives the rotating part 3 to rotate, so that the driving mode of the rotation of the needle bar 2 is simplified. The needle bar 2 rotates in the needle bar sleeve 302, so that interference caused by sundries to the rotation of the needle bar 2 is avoided, and the stability and the precision of the rotation of the needle bar 2 are improved.

Still include bearing 8, bearing 8 fixedly installs in shaft hole 101, leaves clearance 9 between the bearing 8, and needle bar cover 302 wears to locate in the bearing 8. The needle bar sleeve 302 rotates in the shaft hole 101 through the bearing 8, so that the flexibility and the stability of the needle bar sleeve 302 rotating in the shaft hole 101 are improved.

The outer wall of the needle bar sleeve 302 is provided with a through hole 3021, the through hole 3021 is communicated with the air inlet channel 5 through a gap 9 between the bearings 8, and the through hole 3021 is communicated with a gap between the plane 2011 and the needle bar sleeve 302. The air source can conveniently enter the needle rod sleeve 302 to blow the needle rod 2, and the air inlet structure is simplified. The through hole 3021 includes a first through hole 30211 and a second through hole 30212, and the first through hole 30211 and the second through hole 30212 are symmetrically disposed on the needle bar sleeve 302. The blowing is convenient for blowing air to the two sides of the plane section 201 of the needle bar 2, and the stability of the needle bar 2 during working is further improved.

Example 2

As shown in fig. 1 to 5, in embodiment 1, a worm wheel 301 is provided with a positioning hole 3011 communicating with the inside of the worm wheel 301, a positioning pin 6 is fixedly inserted into the positioning hole 3011, and an inner end surface of the positioning pin 6 abuts against a plane 2011. The positioning pin 6 is used for fixing the relative positions of the worm wheel 301 and the needle bar 2, so that the worm wheel 301 drives the needle bar 2 to synchronously rotate when rotating.

Example 3

A sewing machine with a needle bar cleaning mechanism is disclosed, as shown in fig. 1 to 5, on the basis of embodiment 2, an air inlet channel 5 comprises a first channel 501 and a second channel 502, the first channel 501 is transversely arranged on a machine head 1, one end of the first channel 501 is communicated with an axle hole 101, a sealing screw is fixedly arranged in the other end of the first channel 501 in a penetrating manner, the second channel 502 is vertically arranged on the machine head 1, the upper end of the second channel 502 is communicated with the first channel 501, and the lower end of the second channel 502 is connected with an air inlet joint 4. The air inlet joint 4 is arranged at the lower end of the second channel 502, even if the air inlet joint 4 is arranged below the machine head 1, the whole volume of the sewing machine is reduced.

In operation, the air source is connected from the air inlet joint 4, sequentially passes through the second channel 502 and the first channel 501, and because the opening at the other end of the first channel 501 is sealed by the sealing screw, the air source reaches the gap 9 between the bearings 8, and enters the space between the needle rod sleeve 302 and the plane 2011 of the needle rod 2 through the first through hole 30211 or the second through hole 30212 to blow air into the needle rod 2. Meanwhile, the worm wheel 301 is provided with the positioning pin 6 to block a channel through which the air source flows upwards, so that the air source is directly discharged from the lower end of the needle rod sleeve to form an air outlet channel, and meanwhile, sundries on the needle rod 2 are taken out.

Claims

1. The utility model provides a sewing machine with clean mechanism of needle bar, includes aircraft nose (1) and needle bar (2), and needle bar (2) rotationally install on aircraft nose (1), its characterized in that: the lower end of the needle bar (2) is sleeved with a rotating part (3), and the rotating part (3) and the needle bar (2) rotate synchronously;

the lower end of the machine head (1) is provided with a shaft hole (101), and the rotating part (3) can rotatably penetrate through the shaft hole (101);

the air-intake joint is characterized by further comprising an air-intake joint (4), an air-intake passage (5) is further formed in the lower end of the machine head (1), the air-intake joint (4) is connected with the air-intake passage (5), and the air-intake passage (5) is communicated with the shaft hole (101).

2. A sewing machine with a needle bar cleaning mechanism according to claim 1, characterized in that: be equipped with plane section (201) on needle bar (2), be equipped with plane (2011) that the symmetry set up on the surface of plane section (201), on plane section (201) was located in rotation portion (3) cover, rotation portion (3) were offset through locating pin (6) and plane (2011).

3. A sewing machine with a needle bar cleaning mechanism as claimed in claim 2, wherein: still including installing in worm (7) of aircraft nose (1), rotation portion (3) include worm wheel (301) and needle bar cover (302), and worm (7) mesh with worm wheel (301) and drive worm wheel (301) and rotate, and worm wheel (301) and needle bar cover (302) set up with one heart and formula structure as an organic whole, and needle bar cover (302) sets up in the below of worm wheel (301) fixedly.

4. A sewing machine with a needle bar cleaning mechanism according to claim 3, characterized in that: still include bearing (8), bearing (8) are installed in shaft hole (101) fixedly, leave clearance (9) between bearing (8), and needle bar cover (302) are worn to locate in bearing (8).

5. A sewing machine with a needle bar cleaning mechanism as claimed in claim 4, wherein: the outer wall of the needle rod sleeve (302) is provided with a through hole (3021), the through hole (3021) is communicated with the air inlet channel (5) through a gap (9) between the bearings (8), and the through hole (3021) is communicated with a gap between the plane (2011) and the needle rod sleeve (302).

6. The sewing machine with the needle bar cleaning mechanism as claimed in claim 5, wherein: the through hole (3021) comprises a first through hole (30211) and a second through hole (30212), and the first through hole (30211) and the second through hole (30212) are symmetrically arranged on the needle rod sleeve (302).

7. A sewing machine with a needle bar cleaning mechanism according to claim 3, characterized in that: the worm wheel (301) is provided with a positioning hole (3011) communicated with the inside of the worm wheel (301), the positioning pin (6) is fixedly arranged in the positioning hole (3011) in a penetrating mode, and the inner end face of the positioning pin (6) is abutted to the plane (2011).

8. A sewing machine with a needle bar cleaning mechanism according to claim 1, characterized in that: the air inlet channel (5) comprises a channel I (501) and a channel II (502), the channel I (501) is transversely arranged on the machine head (1), one end of the channel I (501) is communicated with the shaft hole (101), a sealing screw fixedly penetrates through the other end of the channel I (501), the channel II (502) is vertically arranged on the machine head (1), the upper end of the channel II (502) is communicated with the channel I (501), and the lower end of the channel II (502) is connected with the air inlet connector (4).