CN217203187U

CN217203187U - Sewing machine

Info

Publication number: CN217203187U
Application number: CN202220183469.3U
Authority: CN
Inventors: 任恩林; 蒋达淼; 周善足
Original assignee: Zhejiang Qishi Electromechanical Technology Co ltd
Current assignee: Zhejiang Qishi Electromechanical Technology Co ltd
Priority date: 2021-06-30
Filing date: 2022-01-22
Publication date: 2022-08-16
Anticipated expiration: 2032-01-22

Abstract

The utility model belongs to the technical field of sewing equipment, in particular to a sewing machine, which comprises a feeding shaft, a feed lifting shaft, a presser foot lifting mechanism, a thread trimming mechanism and a linkage shaft sleeve, wherein the linkage shaft sleeve is sleeved on the feeding shaft; a first crank is fixed at one end of the linkage shaft sleeve, and a second crank is fixed at the other end of the linkage shaft sleeve; the lifting seat is driven by the first crank; the front part of the lifting seat drives a presser foot lifting connecting rod of the presser foot lifting mechanism; the thread cutting crank is driven by the swinging part of the second crank; the thread cutting crank is fixed on a thread cutting shaft of the thread cutting mechanism; and the first motor drives the linkage shaft sleeve to swing. The utility model discloses a change on the basis of traditional model, the part wildcard nature is better, and the practicality is stronger. The linkage shaft sleeve is arranged on the feeding shaft, and the feeding shaft is used for rotating and positioning in the middle, so that the existing feeding shaft is not required to be changed; the thread cutting mechanism and the presser foot lifting mechanism are both in the prior art, and the existing machine type can be adapted only by adjusting the thread cutting crank and the presser foot lifting connecting rod.

Description

Sewing machine

Technical Field

The utility model belongs to the technical field of make up equipment, refer in particular to a sewing machine.

Background

The Chinese patent application CN201910097866 discloses a thread trimming and presser foot lifting and needle sealing device of a sewing machine and the sewing machine, which comprises a power part, a thread trimming cam and a transmission assembly, wherein the power part drives the thread trimming cam and the transmission assembly to synchronously rotate, the transmission assembly drives a presser foot lifting and needle sealing driving shaft to rotate, the presser foot lifting and needle sealing driving shaft is provided with a presser foot lifting crank and a needle sealing cam, a thread trimming contour surface on the thread trimming cam can be matched with a thread trimming ball on the thread trimming driving crank, the thread trimming driving crank is driven to rotate and drives a thread trimming mechanism to execute thread trimming actions, the rotation of the presser foot lifting crank can drive the presser foot lifting mechanism to execute the presser foot lifting actions, and the needle sealing contour surface on the needle sealing cam can drive a needle distance adjusting mechanism to execute the needle distance adjusting actions.

The invention has the following defects:

the motor sets up inside the sewing machine casing, because the whole volume of motor is great, is not convenient for its installation, and can lead to sewing machine internals overall arrangement difficulty.

Disclosure of Invention

The utility model aims at providing a sewing machine that overall arrangement is simple, the assembly is easy and have good drive effect.

The purpose of the utility model is realized like this:

a sewing machine comprises a feeding shaft, a feed lifting tooth shaft, a presser foot lifting mechanism, a thread trimming mechanism and the like

The linkage shaft sleeve is sleeved on the feeding shaft; a first crank is fixed at one end of the linkage shaft sleeve, and a second crank is fixed at the other end of the linkage shaft sleeve;

the lifting seat is driven by the first crank; the front part of the lifting seat drives a pressure foot lifting connecting rod of the pressure foot lifting mechanism;

the thread cutting crank is driven by the swinging part of the second crank; the thread cutting crank is fixed on a thread cutting shaft of the thread cutting mechanism;

and the first motor drives the linkage shaft sleeve to swing.

Furthermore, the lifting seat and the pressure raising and pressing foot connecting rod and the swinging part of the second crank and the thread cutting crank can be separated intermittently; when the lifting seat drives the presser foot lifting connecting rod, the swinging part of the second crank is separated from the thread trimming crank; when the swinging part of the second crank drives the thread trimming crank, the lifting seat is separated from the presser foot lifting connecting rod.

Further, the lifting seat is provided with a bearing area, and the lower end of a pressure lifting foot connecting rod of the pressure lifting foot mechanism abuts against the bearing area.

Further, the surface of the bearing area is provided with an abutting groove, and the abutting groove is used for abutting against the presser foot lifting connecting rod.

Further, promote the seat and adjacent setting with first crank, first crank includes with the connecting portion that first motor is connected with promote the seat and lean on the portion of leaning on mutually.

Further, the abutting portion comprises an L-shaped abutting block, one end of the L-shaped abutting block is fixed to the lower side of the connecting portion, and the other end of the L-shaped abutting block abuts against the abutting surface.

Further, a strip-shaped groove is formed in the thread cutting crank, and an opening is formed in one end of the strip-shaped groove; the swinging part of the second crank slides in the strip-shaped groove and drives the thread trimming crank; when the lifting seat drives the pressure foot lifting connecting rod, the swinging part of the second crank is separated from the thread trimming crank from the opening.

Furthermore, the device also comprises a second motor which drives the needle pitch adjusting mechanism; the stitch length adjusting mechanism controls the backstitch or the forward stitch of the stitch length and sets the stitch length through the stitch length adjusting mechanism.

Compared with the prior art, the utility model outstanding and profitable technological effect is:

the utility model discloses a change on the basis of traditional model, the part wildcard nature is better, and the practicality is stronger. The linkage shaft sleeve is arranged on the feeding shaft, and the feeding shaft is used for rotating and positioning in the middle, so that the existing feeding shaft is not required to be changed; the thread cutting mechanism and the presser foot lifting mechanism are both in the prior art, and the existing machine type can be adapted only by adjusting the thread cutting crank and the presser foot lifting connecting rod.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural view of the linkage shaft sleeve.

Fig. 3 is a first exploded view of fig. 2.

Fig. 4 is an exploded view of fig. 2.

Fig. 5 is an enlarged view at a in fig. 2.

The reference numerals in the figures denote the meanings:

1. a first motor; 2. a second motor; 3. an adjustment mechanism; 4. a feed lifting shaft; 5. a thread cutting shaft; 6. a thread trimming mechanism; 7. a tooth lifting mechanism; 8. a feed shaft; 10. lifting a presser foot connecting rod; 11. a first motor shaft; 12. a motor crank; 13. a motor connecting rod; 14. a first crank; 141. a connecting portion; 142. an abutting portion; 15. a lifting seat; 151. a load-bearing area; 152. an abutting surface; 153. abutting against the groove; 16. a linkage shaft sleeve; 17. a second crank; 171. a swing portion; 18. a thread cutting crank; 181. a strip-shaped groove; 182. an opening; 101. a presser foot lifting mechanism.

Detailed Description

The invention will be further described with reference to specific embodiments below:

a sewing machine comprises a machine shell, a feeding shaft 8, a feed lifting tooth shaft 4, a presser foot lifting mechanism 101 and a thread trimming mechanism 6, wherein the feeding shaft, the feed lifting tooth shaft 4, the presser foot lifting mechanism 101 and the thread trimming mechanism 6 are arranged in the machine shell;

as shown in fig. 1, the feeding shaft 8 and the feed lifting rock shaft 4 are used for driving the feed lifting rock mechanism 7 to rotate in a reciprocating and circumferential manner so as to feed the feed lifting rock; the presser foot lifting mechanism 101 is connected with a presser foot of the sewing machine and used for lifting the presser foot, and a presser foot lifting connecting rod 10 arranged downwards is further arranged on the presser foot lifting mechanism 101; the thread cutting mechanism 6 is arranged on one side of the feed lifting mechanism 7, and thread cutting is carried out by driving a moving knife in the thread cutting mechanism 6 to move towards one side of a top knife. Above-mentioned tooth mechanism 7, trimming mechanism 6 and lift presser foot mechanism 101 and be current structure, the utility model discloses no longer do too much repetitious description.

Furthermore, the middle sewing machine of the utility model also comprises

The linkage shaft sleeve 16 is sleeved on the feeding shaft 8; a first crank 14 is fixed at one end of the linkage shaft sleeve 16, and a second crank 17 is fixed at the other end of the linkage shaft sleeve 16;

a lifting seat 15 driven by the first crank 14; the front part of the lifting seat 15 drives a presser foot lifting connecting rod 10 of a presser foot lifting mechanism 101;

the trimming crank 18 is driven by the swinging part 171 of the second crank 17; the thread cutting crank 18 is fixed on the thread cutting shaft 5 of the thread cutting mechanism 6;

as shown in fig. 2, a bearing member for rotating the linkage shaft sleeve 16 on the feeding shaft 8 is arranged between the linkage shaft sleeve 16 and the feeding shaft 8, so that the linkage shaft sleeve 16 does not rotate along with the rotation of the feeding shaft 8; the first crank 14 and the second crank 17 are arranged on two sides of the linkage shaft sleeve 16 through an integrally formed or clamped structure; the lifting seat 15 is sleeved on the linkage shaft sleeve 16 and does not rotate along with the rotation of the linkage shaft sleeve 16, a bearing area 151 is arranged at the front part of the lifting seat 15, the bearing area 151 is specifically a butting plane, and the butting plane has an arc-shaped butting groove 153 matched with the presser foot lifting connecting rod 10, so that when the lifting seat 15 is lifted, the presser foot lifting connecting rod 10 is driven to be lifted to lift the presser foot.

The utility model drives the linkage shaft sleeve 16 to swing through the first motor 1, and performs the thread cutting action or the presser foot lifting action through the movement of the linkage shaft sleeve 16; when the presser foot needs to be lifted, as shown in fig. 2, a first motor shaft 11 is arranged on the first motor 1, the other end of the first motor shaft 11 is connected with a motor crank 12, the other end of the motor crank 12 is connected with a motor connecting rod 13, and the motor connecting rod 13 is rotatably connected with the first crank 14. The lifting seat 15 is arranged adjacent to the first crank 14, the first crank 14 includes a connecting portion 141 and an abutting portion 142, the connecting portion 141 is rotatably connected with the motor connecting rod 13, the abutting portion 142 is specifically an L-shaped abutting block arranged on the lower side of the connecting portion 141, one side of the abutting block is provided with a strip-shaped groove, one side of the abutting block is connected and fixed with the lower side of the connecting portion 141 through a screw, and the other side of the abutting block abuts against the lifting seat 15, specifically against an abutting surface 152 of a bearing area 151 of the lifting seat 15; the purpose of setting up the bar groove can change the position of leaning on portion 142 through the bar groove to change the butt joint point of leaning on portion 142 and lifting seat 15, finely tune lifting seat 15 initial position through changing the butt joint point, and finely tune the presser foot lifting effect through the change of lifting seat 15 initial position. When the presser foot lifting mechanism is used, the first motor 1 rotates upwards to drive the first crank 14 to swing, so that the abutting part 142 on the first crank 14 abuts against the lifting seat 15 upwards, and drives the lifting seat 15 to move upwards to push the presser foot lifting connecting rod 10 to work to lift the presser foot.

When the wire cutting is required, the first motor 1 rotates downwards to drive the first crank 14 to move, the first crank 14 drives the linkage shaft sleeve 16 to move downwards and drives the second crank 17 to move downwards at the same time, the swinging portion 171 of the second crank 17 is connected with the wire cutting crank 18, the wire cutting mechanism 6 is driven to work through the wire cutting crank 18, and therefore the wire cutting mechanism 6 is driven to work through the downward movement of the second crank 17 to cut the wire.

Furthermore, the lifting seat 15 and the lifting foot connecting rod 10, and the swinging part 171 of the second crank 17 and the trimming crank 18 can be separated intermittently; that is, when the lifting base 15 drives the presser foot link 10, the swing portion 171 of the second crank 17 is separated from the trimming crank 18, and when the swing portion 171 of the second crank 17 drives the trimming crank 18, the lifting base 15 is separated from the presser foot link 10.

Specifically, while the second crank 17 moves downward, the first crank 14 moves downward at the same time, and since the first crank 14 and the lifter base 15 are in contact with each other up and down, the first crank 14 is separated from the lifter base 15 when the first crank 14 moves downward.

Meanwhile, the swinging portion 171 of the second crank 17 and the trimming crank 18 can be intermittently separated by changing the structure of the trimming crank 18. With reference to fig. 2 and 4, a strip-shaped groove 181 is formed in the trimming crank 18, and an opening 182 is formed at one end of the strip-shaped groove 181; wherein, trimming crank 18 is connected with trimming mechanism 6 through the clamp form, has in clamp side integrated into one piece bar groove 181, bar groove 181 downward sloping setting to be equipped with vertical opening 182, second crank 17's swing portion 171 specifically is the cross axle that sets up at second crank 17 end, and the cross axle is located in the bar groove 181, when second crank 17 downswing, through swing portion 171 promotes downwards trimming crank 18 downswing carries out the trimming, and when second crank 17 was upwards, the cross axle upwards swing is followed opening 182 breaks away from bar groove 181 to make trimming crank 18 in second crank 17 phase separation, make both no longer link.

The utility model discloses a linkage axle sleeve 16's structure, the just reversal that comes through single step motor realizes the trimming action and lifts the presser foot action, and because first motor 1 sets up in one side of sewing machine casing, and it does not occupy the inside volume of sewing machine, and the installation of being convenient for, and makes overall arrangement simple, and the cooperation is good between each part. And simultaneously, the utility model discloses a lifting seat 15 and lift between presser foot connecting rod 10 and the swing portion 171 of second crank 17 and the separation structure of intermittent type nature between trimming crank 18 realize the trimming action and lift the separation of presser foot action, prevent that its synchronous operation from influencing the sewing machine and using.

Furthermore, the sewing machine of the utility model also comprises a second motor 2 which drives a needle pitch adjusting mechanism 3; the needle pitch adjusting mechanism 3 drives the feeding shaft 8 to swing in a reciprocating mode. The needle pitch adjusting mechanism 3 is arranged on the feeding shaft 8, the needle pitch adjusting mechanism 3 comprises an adjusting swing seat, a first connecting rod, a second connecting rod and an adjusting connecting rod, the adjusting swing seat, the first connecting rod, the second connecting rod and the adjusting connecting rod are sequentially connected, and the adjusting connecting rod is connected with a sewing machine main shaft; the second motor is connected with the adjusting swing seat, and drives the adjusting connecting rod to adjust the needle pitch by driving the adjusting swing seat to work. The utility model discloses a first motor 1 and second motor 2 come to go the gauge needle respectively and adjust and lift the operation of presser foot, trimming, and overall structure is simple, and separately the first motor 1 of operation and second motor 2 can reduce the production of trouble a bit.

The above-mentioned embodiment is only the preferred embodiment of the present invention, and does not limit the protection scope of the present invention according to this, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A sewing machine comprises a feeding shaft (8), a feed lifting tooth shaft (4), a presser foot lifting mechanism (101), a thread cutting mechanism (6) and a first motor (1), and is characterized by further comprising

The linkage shaft sleeve (16) is sleeved on the feeding shaft (8); a first crank (14) is fixed at one end of the linkage shaft sleeve (16), and a second crank (17) is fixed at the other end of the linkage shaft sleeve (16);

a lifting seat (15) driven by the first crank (14); the front part of the lifting seat (15) drives a presser foot lifting connecting rod (10) of the presser foot lifting mechanism (101);

the trimming crank (18) is driven by a swinging part (171) of the second crank (17); the thread cutting crank (18) is fixed on a thread cutting shaft (5) of the thread cutting mechanism (6);

and the first motor (1) drives the linkage shaft sleeve (16) to swing.

2. A machine according to claim 1, characterized in that the intermittent separation between the lifting seat (15) and the presser foot link (10), between the second crank oscillating portion (171) and the trimming crank (18);

when the lifting seat (15) drives the presser foot lifting connecting rod (10), the swinging part (171) of the second crank is separated from the trimming crank (18);

when the swinging part (171) of the second crank drives the trimming crank (18), the lifting seat (15) is separated from the presser foot lifting connecting rod (10).

3. Sewing machine as in claim 1, characterized in that said lifting seat (15) is provided with a bearing area (151) against which the lower end of the presser foot lifting link (10) of the presser foot lifting mechanism abuts.

4. A sewing machine according to claim 3, characterized in that the bearing area (151) surface is provided with an abutment recess (153), the abutment recess (153) being intended to abut against the presser foot lifting link (10).

5. A sewing machine according to claim 3, characterized in that the lifting seat (15) is arranged adjacent to a first crank (14), the first crank (14) comprising an abutment (142) against which a connecting portion (141) connected to the first motor (1) abuts the lifting seat (15).

6. A sewing machine according to claim 5, wherein the abutment (142) comprises an L-shaped abutment block, one end of which is fixed to the underside of the connecting portion (141) and the other end of which abuts against the abutment surface (152).

7. The sewing machine as claimed in claim 1, characterized in that the thread trimming crank (18) is provided with a strip-shaped groove (181), one end of the strip-shaped groove (181) being provided with an opening (182);

the swinging part (171) of the second crank slides in the strip-shaped groove (181) and drives the trimming crank (18);

when the lifting seat (15) drives the presser foot lifting connecting rod (10), the swinging part (171) of the second crank is separated from the opening (182) to form the thread cutting crank (18).

8. The sewing machine of any of claims 1-7, further comprising

A second motor which drives the needle pitch adjusting mechanism (3); the stitch length adjusting mechanism (3) controls the backstitch or the forward stitch of the stitch length, and the stitch length is set through the stitch length adjusting mechanism (3).