阅读说明：本技术 一种缝纫机短线头剪线机构 (Short thread end thread cutting mechanism of sewing machine ) 是由 嵇建国 黄大好 于 2019-10-22 设计创作，主要内容包括：本发明属于机械设备技术领域,具体公开了一种缝纫机短线头剪线机构,包括齿形皮带轮,齿形皮带轮安装在万向连接轴一端,万向连接轴另一端设置有剪线凸轮,剪线凸轮上方设置有离合器臂,离合器臂上设置有剪线座和剪线电磁阀,剪线钢球设置在离合器臂一端,离合器臂上通过连接杆设置有剪线主动齿轮,剪线主动齿轮上安装有主动齿轮座,剪线主动齿轮一侧设置有剪线从动齿轮,剪线从动齿轮上设置有釜轴外套管,釜轴外套管上设置有动刀,动刀一侧设置有定刀座,定刀座上设置有夹线弹片座,夹线弹片座上设置有夹线弹片和定刀。本发明能够实现短线头剪线,稳定性强,不易卡线,结构简单,操作方便,实用性强。(The invention belongs to the technical field of mechanical equipment, and particularly discloses a short thread end thread trimming mechanism of a sewing machine, which comprises a toothed belt pulley, wherein the toothed belt pulley is installed at one end of a universal connecting shaft, a thread trimming cam is arranged at the other end of the universal connecting shaft, a clutch arm is arranged above the thread trimming cam, a thread trimming seat and a thread trimming electromagnetic valve are arranged on the clutch arm, a thread trimming steel ball is arranged at one end of the clutch arm, a thread trimming driving gear is arranged on the clutch arm through a connecting rod, a driving gear seat is installed on the thread trimming driving gear, a thread trimming driven gear is arranged at one side of the thread trimming driving gear, a kettle shaft outer sleeve is arranged on the thread trimming driven gear, a movable knife is arranged on the kettle shaft outer sleeve, a fixed knife seat is arranged at one side of the movable knife, a thread clamping elastic sheet. The invention can realize short thread end trimming, has strong stability, is not easy to clamp threads, and has simple structure, convenient operation and strong practicability.)

1. The utility model provides a short thread end thread trimming mechanism of sewing machine which characterized in that: comprises a toothed belt pulley (1), a universal connecting shaft (2), a trimming cam (3), a clutch arm (4), a trimming seat (5), a trimming steel ball (6), a trimming electromagnetic valve (7), a connecting rod (8), a trimming driving gear (9), a driving gear seat (10), a trimming driven gear (11), a stationary knife seat (12), a trimming elastic sheet seat (13), a trimming elastic sheet (14), a stationary knife (15), a movable knife (16) and a kettle shaft outer sleeve (17), wherein the toothed belt pulley (1) is arranged at one end of the universal connecting shaft (2), the other end of the universal connecting shaft (2) is provided with the trimming cam (3), the clutch arm (4) is arranged above the trimming cam (3), the clutch arm (4) is provided with the trimming seat (5) and the trimming electromagnetic valve (7), the trimming (6) is arranged at one end of the clutch arm (4), be provided with trimming driving gear (9) through connecting rod (8) on clutch arm (4), install driving gear seat (10) on trimming driving gear (9), trimming driving gear (9) one side is provided with trimming driven gear (11), be provided with cauldron axle outer tube (17) on trimming driven gear (11), be provided with on cauldron axle outer tube (17) and move sword (16), it is provided with stationary knife seat (12) to move sword (16) one side, be provided with on stationary knife seat (12) and press from both sides line shell fragment seat (13), be provided with on pressing from both sides line shell fragment seat (13) and stationary knife (15).

2. The thread trimmer according to claim 1, wherein the thread trimmer further comprises: the trimming cam (3) is fixed on the universal connecting shaft (2) through a fixing screw (18).

3. The thread trimmer according to claim 1, wherein the thread trimmer further comprises: the trimming steel ball (6) is fixed at one end of the clutch arm (4) through a fixing bolt (19).

4. The thread trimmer according to claim 1, wherein the thread trimmer further comprises: the connecting rod (8) is fixed on the trimming driving gear (9) through a fixing bolt (19).

5. The thread trimmer according to claim 1, wherein the thread trimmer further comprises: the trimming driving gear (9) is connected with the driving gear seat (10) through a limiting bolt (20).

6. The thread trimmer according to claim 1, wherein the thread trimmer further comprises: the trimming driving gear (9) is provided with an arc-shaped groove (21), the driving gear seat (10) is correspondingly provided with the arc-shaped groove (21), and the limiting rod (22) penetrates through the arc-shaped groove (21) on the trimming driving gear (9) and the arc-shaped groove (21) on the driving gear seat (10).

7. The thread trimmer according to claim 1, wherein the thread trimmer further comprises: the trimming driven gear (9) is fixed at the bottom end of the kettle shaft outer sleeve (17) through a fixing screw (18).

8. The thread trimmer according to claim 1, wherein the thread trimmer further comprises: the movable knife (16) is arranged at the top end of the movable knife holder (23), and the movable knife holder (23) is fixed at the top end of the kettle shaft outer sleeve (17) through a fixing screw (18).

9. The thread trimmer according to claim 1, wherein the thread trimmer further comprises: the fixed cutter seat (12) is provided with a plurality of wiring holes (24).

10. The thread trimmer according to claim 1, wherein the thread trimmer further comprises: the fixed knife (15) and the wire clamping spring sheet (14) can be adjusted, and the movable knife (16) can be circumferentially adjusted.

Technical Field

The invention relates to the field of equipment correlation, in particular to a short thread end thread cutting mechanism of a sewing machine.

Background

Automatic trimming of the existing market roller car is realized, the wire end is longer after trimming, manual secondary trimming is needed, manpower is wasted, and the cost is higher. In recent years, a short thread end trimming mechanism also appears, but trimming is unstable and easy to clamp threads, and the short thread end trimming mechanism of the sewing machine is designed to solve the problems.

Disclosure of Invention

The invention aims to provide a short thread end thread cutting mechanism of a sewing machine, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a short thread end trimming mechanism of a sewing machine comprises a toothed belt pulley, a universal connecting shaft, a trimming cam, a clutch arm, a trimming seat, a trimming steel ball, a trimming electromagnetic valve, a connecting rod, a trimming driving gear, a driving gear seat, a trimming driven gear, a fixed cutter seat, a trimming elastic sheet, a fixed cutter, a movable cutter and a kettle shaft outer sleeve, wherein the toothed belt pulley is arranged at one end of the universal connecting shaft, the trimming cam is arranged at the other end of the universal connecting shaft, the clutch arm is arranged above the trimming cam, the trimming seat and the trimming electromagnetic valve are arranged on the clutch arm, the trimming steel ball is arranged at one end of the clutch arm, the trimming driving gear is arranged on the clutch arm through the connecting rod, the driving gear seat is arranged on the trimming driving gear, the trimming driven gear is arranged on one side of the trimming driving gear, the kettle shaft outer sleeve is arranged on the trimming driven gear, the automatic wire clamping device is characterized in that a movable knife is arranged on the outer sleeve of the kettle shaft, a fixed knife holder is arranged on one side of the movable knife, a wire clamping elastic sheet seat is arranged on the fixed knife holder, and a wire clamping elastic sheet and a fixed knife are arranged on the wire clamping elastic sheet seat.

Preferably, the trimming cam is fixed on the universal connecting shaft through a fixing screw.

Preferably, the trimming steel ball is fixed at one end of the clutch arm through a fixing bolt.

Preferably, the connecting rod is fixed on the trimming driving gear through a fixing bolt.

Preferably, the trimming driving gear and the driving gear seat are connected through a limit bolt.

Preferably, the trimming driving gear is provided with an arc-shaped groove, the driving gear seat is correspondingly provided with an arc-shaped groove, and the arc-shaped groove on the trimming driving gear and the arc-shaped groove on the driving gear seat penetrate through the limiting rod.

Preferably, the trimming driven gear is fixed at the bottom end of the kettle shaft outer sleeve through a fixing screw.

Preferably, the movable knife is arranged at the top end of the movable knife holder, and the movable knife holder is fixed at the top end of the kettle shaft outer sleeve through a fixing screw.

Preferably, the fixed cutter seat is provided with a plurality of wiring holes.

Preferably, the fixed knife and the wire clamping elastic sheet can be adjusted, and the movable knife can be circumferentially adjusted.

Compared with the prior art, the invention has the beneficial effects that: according to the short thread end thread cutting mechanism of the sewing machine, the universal connecting shaft and the thread cutting cam are driven to rotate through the toothed belt pulley, the electromagnetic valve is controlled by the electric control system to move, the clutch arm is driven to swing, the thread cutting steel ball is driven to be in contact with the thread cutting cam, the thread cutting driving gear is driven to rotate and the driven gear is driven to rotate through the connecting rod under the rotation motion of the thread cutting cam, so that the movable knife is driven to move, the movable knife is matched with the fixed knife to contact with thread cutting, and thread clamping is carried out by the thread clamping elastic pieces after thread cutting.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of the present invention;

FIG. 3 is a schematic view of a trimming cam of the present invention;

in the figure: 1. a toothed belt pulley; 2. a universal connecting shaft; 3. a trimming cam; 4. a clutch arm; 5. a wire cutting seat; 6. shearing a steel ball; 7. a trimming electromagnetic valve; 8. a connecting rod; 9. a trimming driving gear; 10. a driving gear seat; 11. a thread trimming driven gear; 12. a fixed cutter seat; 13. a wire clamping spring sheet seat; 14. a wire clamping elastic sheet; 15. fixing a cutter; 16. moving a knife; 17. a kettle shaft outer sleeve; 18. fixing screws; 19. fixing the bolt; 20. a limit bolt; 21. an arc-shaped slot; 22. a limiting rod; 23. a movable cutter seat; 24. a wiring hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1-3, the present invention provides a technical solution: a short thread end thread trimming mechanism of a sewing machine comprises a toothed belt pulley 1, a universal connecting shaft 2, a thread trimming cam 3, a clutch arm 4, a thread trimming seat 5, a thread trimming steel ball 6, a thread trimming electromagnetic valve 7, a connecting rod 8, a thread trimming driving gear 9, a driving gear seat 10, a thread trimming driven gear 11, a fixed cutter seat 12, a thread clamping elastic sheet seat 13, a thread clamping elastic sheet 14, a fixed cutter 15, a movable cutter 16 and a kettle shaft outer sleeve 17, wherein the toothed belt pulley 1 is installed at one end of the universal connecting shaft 2, the other end of the universal connecting shaft 2 is provided with the thread trimming cam 3, the clutch arm 4 is arranged above the thread trimming cam 3, the thread trimming seat 5 and the thread trimming electromagnetic valve 7 are arranged on the clutch arm 4, the thread trimming steel ball 6 is arranged at one end of the clutch arm 4, the thread trimming driving gear 9 is arranged on the thread trimming driving gear 9 through the connecting rod 8, the trimming device is characterized in that a trimming driven gear 11 is arranged on one side of the trimming driving gear 9, a kettle shaft outer sleeve 17 is arranged on the trimming driven gear 11, a movable knife 16 is arranged on the kettle shaft outer sleeve 17, a fixed knife holder 12 is arranged on one side of the movable knife 16, a wire clamping elastic sheet seat 13 is arranged on the fixed knife holder 12, and a wire clamping elastic sheet 14 and a fixed knife 15 are arranged on the wire clamping elastic sheet seat 13.

Further, the trimming cam 3 is fixed on the universal connecting shaft 2 through a fixing screw 18.

Further, the trimming steel ball 6 is fixed at one end of the clutch arm 4 through a fixing bolt 19.

Further, the connecting rod 8 is fixed on the thread trimming driving gear 9 through a fixing bolt 19.

Further, the thread trimming driving gear 9 and the driving gear seat 10 are connected by a limit bolt 20.

Further, the trimming driving gear 9 is provided with an arc-shaped groove 21, the driving gear seat 10 is correspondingly provided with the arc-shaped groove 21, and the limiting rod 22 penetrates through the arc-shaped groove 21 on the trimming driving gear 9 and the arc-shaped groove 21 on the driving gear seat 10.

Further, the thread trimming driven gear 9 is fixed at the bottom end of the kettle shaft outer sleeve 17 through a fixing screw 18.

Further, the movable knife 16 is arranged at the top end of the movable knife holder 23, and the movable knife holder 23 is fixed at the top end of the kettle shaft outer sleeve 17 through a fixing screw 18.

Further, a plurality of wiring holes 24 are formed in the fixed tool base 12.

Furthermore, the fixed knife 15 and the wire clamping spring plate 14 can be adjusted, and the movable knife 16 can be circumferentially adjusted.

The working principle is as follows: the invention relates to a short thread end thread cutting mechanism of a sewing machine, when in use, a main motor drives a toothed belt pulley 1, a universal connecting shaft 2 drives a thread cutting cam 3 to move, an electric control system controls a thread cutting electromagnetic valve 7 to work to drive a clutch arm 4 to swing, the clutch arm 4 swings to drive a thread cutting steel ball 6 to contact with the thread cutting cam 3, under the rotation motion of the thread cutting cam 3, a connecting rod 8 drives a thread cutting driving gear 9 to rotate, the thread cutting driving gear 9 swings under the limitation of a driving gear seat 10 to drive a thread cutting driven gear 11 to swing, the thread cutting driven gear 11 swings to drive a kettle shaft outer sleeve 17 to swing, so that a movable knife 16 arranged at the top end of the kettle shaft outer sleeve 17 moves, the movable knife 16 is in mutual contact with a fixed knife 15 arranged on a fixed knife seat 12 to carry out thread cutting operation, and after the thread cutting operation, a thread clamping elastic sheet 14 arranged on a thread clamping elastic sheet seat 13 carries, because the fixed knife 15, the movable knife 16 and the thread clamping elastic sheet 14 can be adjusted, and the fixed knife 15 can be adjusted to be close to a needle plate hole, the purpose that the thread end is short after thread trimming is achieved.

It is worth noting that: the whole device is controlled by the master control button, and the equipment matched with the control button is common equipment, so that the device belongs to the existing well-known technology, and the electrical connection relation and the specific circuit structure of the device are not repeated.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.