阅读说明：本技术 一种缝纫机剪线机构及缝纫机 (Thread trimming mechanism of sewing machine and sewing machine ) 是由 孙君 于 2021-11-12 设计创作，主要内容包括：本发明提供的缝纫机剪线机构,包括支撑板、剪线组件、驱动组件和传动组件,通过使传动组件包括摆杆、滑轨、滑块,使摆杆包括转动穿设在支撑板上的第一杆、垂直连接在第一杆端部的第二杆、连接在第二杆远离第一杆端部的凸柱,使凸柱滑动设置在滑块上的腰型槽内,在第一杆转动时,能够通过凸柱的滑动推动滑块沿滑轨往复运动,进而带动与滑块连接的动刀剪线,通过使驱动组件包括带有编码器的电机,并通过电机带动第一杆转动,能够通过调整电机的运行参数控制第一杆的转动方向、速度和角度,从而调整剪线动作,可调范围大、适应性好、调节方便、部件少、动力传递精准度高、检修方便,本发明提供的缝纫机,操作检修调节方便,适用范围广。(The invention provides a thread trimming mechanism of a sewing machine, which comprises a supporting plate, a thread trimming assembly, a driving assembly and a transmission assembly, wherein the transmission assembly comprises a swing rod, a slide rail and a slide block, the swing rod comprises a first rod rotatably arranged on the supporting plate in a penetrating way, a second rod vertically connected to the end part of the first rod and a convex column connected to the end part of the second rod far away from the first rod, the convex column is arranged in a waist-shaped groove on the slide block in a sliding way, when the first rod rotates, the slide block can be pushed to reciprocate along the slide rail by the sliding of the convex column so as to drive a movable cutter thread trimming connected with the slide block, the driving assembly comprises a motor with an encoder, the motor drives the first rod to rotate, the rotating direction, the speed and the angle of the first rod can be controlled by adjusting the operating parameters of the motor, so that the thread trimming action can be adjusted, the adjustable range is large, the adaptability is good, the adjustment is convenient, the parts are few, and the power transmission precision is high, The sewing machine provided by the invention is convenient to operate, overhaul and adjust, and has a wide application range.)

1. A thread trimming mechanism for a sewing machine, comprising:

the plane of the supporting plate is perpendicular to the horizontal plane, the supporting plate extends along the front-back direction, an installation groove is formed in the left side face of the supporting plate, and a cover plate is connected to the groove edge of the installation groove;

the thread cutting assembly is positioned in the mounting groove and comprises a fixed cutter and a movable cutter, the fixed cutter is detachably connected in a fixed cutter groove in the left side surface of the cover plate, the movable cutter can be arranged in a front-and-back reciprocating motion mode, the movable cutter hooks a thread in front of the supporting plate into the mounting groove through reciprocating motion and cuts the thread through matching with the fixed cutter;

the driving assembly is connected to the right side face of the supporting plate and comprises a motor for driving the movable knife to reciprocate, and an encoder is connected to the motor;

the transmission assembly is used for transmitting the power output by the motor to the movable knife after changing the direction so that the movable knife can reciprocate back and forth;

the method is characterized in that:

the transmission component comprises a swing rod, a slide rail and a slide block, the swing rod comprises a first rod horizontally extending along the left-right direction, a second rod vertically connected with the left end part of the first rod, and a convex column connected with the end part of the second rod far away from the first rod and horizontally extending leftwards, the first rod is axially and rotatably arranged on the support plate in a penetrating way, the right end part of the first rod is used for bearing the power output by the motor, the slide rail is arranged on the right side surface of the cover plate and horizontally extending along the front-back direction, the slide block is slidably arranged on the slide rail and connected with the movable blade, a waist-shaped groove for containing the convex column is further arranged on the slide block, the waist-shaped groove extends along the up-down direction, the groove width of the waist-shaped groove is matched with the outer diameter of the convex column, when the motor drives the first rod to rotate, the convex column slides up and down in the waist-shaped groove, the sliding block and the movable knife are driven to reciprocate along the front-back direction.

2. The thread trimming mechanism of a sewing machine according to claim 1, wherein: the front end of the fixed knife is turned over right and is tilted to form a tilting part, and the edge of the tilting part extends out towards the right front side to form a cutting edge.

3. The thread trimming mechanism of a sewing machine according to claim 2, wherein: the trimming assembly further comprises two side baffles for preventing the movable knife from shaking up and down during reciprocating motion, and the two side baffles are connected to the right side face of the cover plate and located on the upper side and the lower side of the movable knife.

4. The thread trimming mechanism of a sewing machine according to claim 3, wherein: the thread trimming component further comprises fixing plates, the upper end portions and the lower end portions of the fixing plates are connected to the two side baffle plates respectively, and a channel used for the reciprocating motion of the movable cutter is formed among the left surface of each fixing plate, the surfaces of the opposite sides of the two side baffle plates and the right side surface of the cover plate.

5. The thread trimming mechanism of a sewing machine according to claim 4, wherein: the cutting edge is positioned right in front of the channel.

6. The thread trimming mechanism of a sewing machine according to claim 1, wherein: the driving assembly further comprises a motor base, the motor base is composed of a first plate and a second plate which are vertically connected, the first plate is used for connecting the supporting plate, and the second plate is used for fixing the motor.

7. The thread trimming mechanism of a sewing machine according to claim 6, wherein: the driving assembly further comprises a first bevel gear and a second bevel gear, a notch for accommodating the first bevel gear is formed in the middle of the first plate, the first bevel gear is sleeved on the right end portion of the first rod which penetrates through the supporting plate and extends into the notch, a through hole is formed in the middle of the second plate, the second bevel gear is sleeved on an output shaft of the through hole, which penetrates through the motor, and the first bevel gear is vertically meshed with the second bevel gear and used for transmitting power provided by the motor to the first rod after changing the direction.

8. The thread trimming mechanism of a sewing machine according to claim 1, wherein: the slider includes the slider body and connects extension plate on the slider body, the front end of extension plate with be located move the rear end portion of sword and be connected to the protruding boss of right side.

9. The thread trimming mechanism of a sewing machine according to claim 1, wherein: the cover is equipped with tight circle on the first pole, tight circle is located the right side of backup pad and with the backup pad is laminated mutually, tight circle is used for adjusting the projection stretches into the degree of depth in waist type groove.

10. A sewing machine characterized by: the sewing machine comprises the sewing machine thread trimming mechanism according to any one of claims 1 to 9.

Technical Field

The invention belongs to the technical field of sewing machines, and particularly relates to a thread trimming mechanism of a sewing machine and the sewing machine.

Background

The sewing machine is a machine which uses one or more sewing threads to form one or more stitches on a sewing material to enable one or more layers of the sewing material to be interwoven or sewed, can be used for sewing fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastics, paper and the like, and has the advantages of tidy, beautiful, smooth and firm sewed stitches, high sewing speed and simple and convenient use.

Sewing machine need realize the action such as trimming, send the line, presser foot to lift at the operation in-process, for reduce cost, reduce the power supply, current sewing machine adopts many main shafts, a plurality of cams and a plurality of articulate cooperation mostly, with the trimming action match to other actions on, such setting has following defect at least:

1. the adjustment range of the thread cutting amplitude and the thread cutting speed is small, and the adaptability to sewing threads is poor;

2. the operation is inconvenient during adjustment, and the relative positions of a plurality of components are required to be changed to realize the adjustment;

3. mechanical parts are more, the abrasion of any part can cause the precision of power transmission to be poor, the thread cutting time is influenced, and the overhaul is inconvenient.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a trimming mechanism of a sewing machine, which has the advantages of large adjustable range, good adaptability, convenient adjustment, few parts, high power transmission precision and convenient maintenance, and the sewing machine comprising the trimming mechanism of the sewing machine.

In order to achieve the above object, the present invention provides a thread trimming mechanism for a sewing machine, comprising:

the plane of the supporting plate is perpendicular to the horizontal plane, the supporting plate extends along the front-back direction, an installation groove is formed in the left side face of the supporting plate, and a cover plate is connected to the groove edge of the installation groove;

the thread cutting assembly is positioned in the mounting groove and comprises a fixed cutter and a movable cutter, the fixed cutter is detachably connected in a fixed cutter groove in the left side surface of the cover plate, the movable cutter can be arranged in a front-and-back reciprocating motion mode, the movable cutter hooks a thread in front of the supporting plate into the mounting groove through reciprocating motion and cuts the thread through matching with the fixed cutter;

the driving assembly is connected to the right side face of the supporting plate and comprises a motor for driving the movable knife to reciprocate, and an encoder is connected to the motor;

the transmission assembly is used for transmitting the power output by the motor to the movable knife after changing the direction so that the movable knife can reciprocate back and forth;

the transmission component comprises a swing rod, a slide rail and a slide block, the swing rod comprises a first rod horizontally extending along the left-right direction, a second rod vertically connected with the left end part of the first rod, and a convex column connected with the end part of the second rod far away from the first rod and horizontally extending leftwards, the first rod is axially and rotatably arranged on the support plate in a penetrating way, the right end part of the first rod is used for bearing the power output by the motor, the slide rail is arranged on the right side surface of the cover plate and horizontally extending along the front-back direction, the slide block is slidably arranged on the slide rail and connected with the movable blade, a waist-shaped groove for containing the convex column is further arranged on the slide block, the waist-shaped groove extends along the up-down direction, the groove width of the waist-shaped groove is matched with the outer diameter of the convex column, when the motor drives the first rod to rotate, the convex column slides up and down in the waist-shaped groove, the sliding block and the movable knife are driven to reciprocate along the front-back direction.

Preferably, the front end of the fixed knife is turned over rightwards and tilted to form a tilted part, and the edge of the tilted part extends out of the fixed knife rightwards and forwards to form a cutting edge.

Further preferably, the thread trimming assembly further comprises two side baffles for preventing the movable cutter from shaking up and down during reciprocating motion, and the two side baffles are connected to the right side surface of the cover plate and located on the upper side and the lower side of the movable cutter.

Further preferably, the thread trimming assembly further comprises a fixing plate, the upper end and the lower end of the fixing plate are respectively connected to the two side baffles, and a channel for the reciprocating motion of the movable blade is formed among the left surface of the fixing plate, the surfaces of the opposite sides of the two side baffles and the right side surface of the cover plate.

Further preferably, the cutting edge is located directly in front of the channel.

Preferably, the driving assembly further comprises a motor base, the motor base is composed of a first plate and a second plate which are vertically connected, the first plate is used for connecting the supporting plate, and the second plate is used for fixing the motor.

Preferably, the driving assembly further includes a first bevel gear and a second bevel gear, a notch for accommodating the first bevel gear is formed in the middle of the first plate, the first bevel gear is sleeved on the right end portion of the first rod penetrating through the supporting plate and extending into the notch, a through hole is formed in the middle of the second plate, the second bevel gear is sleeved on an output shaft of the motor penetrating through the through hole, and the first bevel gear is vertically engaged with the second bevel gear and is used for changing the direction of the power provided by the motor and then transmitting the power to the first rod.

Preferably, the slider comprises a slider body and an extension plate connected to the slider body, and the front end of the extension plate is connected with a boss which is located at the rear end of the movable blade and protrudes rightward.

Preferably, the cover is equipped with tight circle on the first pole, tight circle is located the right side of backup pad and with the backup pad is laminated mutually, tight circle is used for adjusting the projection stretches into the degree of depth in waist type groove.

The invention also provides a sewing machine comprising the thread trimming mechanism of the sewing machine.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:

the invention provides a thread trimming mechanism of a sewing machine, which comprises a supporting plate, a thread trimming assembly, a driving assembly and a transmission assembly, wherein the transmission assembly comprises a swing rod, a slide rail and a slide block, the swing rod comprises a first rod rotatably arranged on the supporting plate in a penetrating way, a second rod vertically connected to the end part of the first rod and a convex column connected to the end part of the second rod far away from the first rod, the convex column is arranged in a waist-shaped groove on the slide block in a sliding way, when the first rod rotates, the slide block can be pushed to reciprocate along the slide rail by the sliding of the convex column so as to drive a movable cutter thread trimming connected with the slide block, the driving assembly comprises a motor with an encoder, the motor drives the first rod to rotate, the rotating direction, the speed and the angle of the first rod can be controlled by adjusting the operating parameters of the motor, so that the thread trimming action can be adjusted, the adjustable range is large, the adaptability is good, the adjustment is convenient, the parts are few, and the power transmission precision is high, The sewing machine provided by the invention is convenient to operate, overhaul and adjust, and has a wide application range.

Drawings

FIG. 1 is an exploded view of a preferred embodiment of a thread trimming mechanism of a sewing machine according to the present invention.

Fig. 2 is an assembled and exploded view of the thread trimmer assembly of fig. 1.

Wherein: 10. a support plate; 11. mounting grooves; 12. a cover plate; 121. a cutter positioning groove; 20. a thread trimming assembly; 21. fixing a cutter; 211. a warping part; 212. cutting edges; 22. moving a knife; 221. a boss; 23. a side dam; 24. a fixing plate; 30. a drive assembly; 31. a motor; 32. a motor base; 321. a first plate; 3211. a notch; 322. a second plate; 3221. a through hole; 33. a first bevel gear; 34. a second bevel gear; 40. a transmission assembly; 41. a swing rod; 411. a first lever; 4111. tightening a ring; 412. a second lever; 413. a convex column; 42. a slide rail; 43. a slider; 431. a waist-shaped groove; 432. a slider body; 433. an extension board.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the invention easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the invention.

The up-down, left-right, and front-back directions described in the present invention refer to the up-down, left-right, and front-back directions in fig. 1 and 2.

As shown in fig. 1-2, the present invention provides a thread trimming mechanism for a sewing machine, comprising: the wire cutting machine comprises a supporting plate 10, a wire cutting assembly 20, a driving assembly 30 and a transmission assembly 40, wherein the plane of the supporting plate 10 is vertical to the horizontal plane, the supporting plate 10 extends in the front-back direction, the left side surface of the supporting plate 10 is provided with an installation groove 11, and the groove edge of the installation groove 11 is connected with a cover plate 12; the thread cutting assembly 20 is positioned in the mounting groove 11, the thread cutting assembly 20 comprises a fixed cutter 21 and a movable cutter 22, the fixed cutter 21 is detachably connected in a fixed cutter groove 121 on the left side surface of the cover plate 12, the movable cutter 22 can be arranged in a front-back reciprocating motion mode, the movable cutter 22 hooks a thread positioned in front of the support plate 10 into the mounting groove 11 through the front-back reciprocating motion, and the thread is cut through the matching of the movable cutter 21 and the fixed cutter; the driving component 30 is connected to the right side surface of the supporting plate 10, the driving component 30 comprises a motor 31 for driving the movable knife 22 to reciprocate, and the motor 31 is connected with an encoder; the transmission assembly 40 is used for changing the direction of the power output by the motor 31 and then transmitting the power to the movable knife 22, so that the movable knife 22 can reciprocate back and forth; the transmission assembly 40 comprises a swing rod 41, a sliding rail 42 and a sliding block 43, wherein the swing rod 41 comprises a first rod 411 horizontally extending along the left-right direction, a second rod 412 vertically connected to the left end of the first rod 411, and a convex column 413 connected to the end of the second rod 412 far away from the first rod 411 and horizontally extending leftwards, the first rod 411 is axially and rotatably arranged on the support plate 10 in a penetrating manner, the right end of the first rod 411 is used for receiving the power output by the motor 31, the sliding rail 42 is arranged on the right side surface of the cover plate 12 and horizontally extends along the front-back direction, the sliding block 43 is slidably arranged on the sliding rail 42, the sliding block 43 is connected with the movable blade 22, a waist-shaped groove 431 used for accommodating the convex column 413 is further arranged on the sliding block 43, the waist-shaped groove 431 extends along the up-down direction, the groove width of the waist-shaped groove 431 is matched with the outer diameter of the convex column 413, when the motor 31 drives the first rod 411 to rotate, the protruding column 413 slides up and down in the waist-shaped groove 431, and drives the sliding block 43 and the movable blade 22 to reciprocate along the front-back direction.

The benefit that sets up like this lies in, can enough change the direction of transmission of motor power through the cooperation of projection and waist type groove, realize driving the technological effect who moves sword reciprocating motion by motor output shaft's rotation, the direction of rotation, speed and the angle of the first pole of operational parameter control that can pass through the adjustment motor again to the adjustment thread trimming action, it is convenient to adjust, adjustable range is big, the part is few, the power transmission precision is high, it is convenient to overhaul, can adapt to the thread trimming operation of different kind sewing lines, adaptability is good.

In this embodiment, the fixed knife 21 is sheet-shaped, the front end of the fixed knife 21 is turned over to the right and tilted to form a tilted portion 211, the edge of the tilted portion 211 extends out of the fixed knife slot 121 to the right front to form a cutting edge 212, the thread trimming assembly 20 further includes two side guards 23 for preventing the movable knife 22 from shaking up and down during reciprocating movement, the two side guards 23 are connected to the right side of the cover plate 12 and located on the upper and lower sides of the movable knife 22, the thread trimming assembly 20 further includes two fixing plates 24 whose upper and lower ends are respectively connected to the two side guards 23, a channel for reciprocating movement of the movable knife 22 is formed between the left surface of the fixing plate 24, the surfaces of the opposite sides of the two side guards 23, and the right side of the cover plate 12, and the cutting edge 212 is located right in front of the channel.

The advantage that sets up like this lies in, can simplify the shearing cooperation between moving sword and the stationary knife, reduces the invalid motion of moving the sword, can also adapt to the sewing edge of different specifications and prolong the life of blade through the elastic deformation of warpage portion.

In this embodiment, the driving assembly 30 further includes a motor base 32, a first bevel gear 33 and a second bevel gear 34, the motor base 32 is composed of a first plate 321 and a second plate 322 which are vertically connected, the first plate 321 is used for connecting the supporting plate 10, the second plate 322 is used for fixing the motor 31, a gap 3211 for accommodating the first bevel gear 33 is formed in the middle of the first plate 321, the first bevel gear 33 is sleeved on the right end portion of the first rod 411 which penetrates through the supporting plate 10 and extends into the gap 3211, a through hole 3221 is formed in the middle of the second plate 322, the second bevel gear 34 is sleeved on an output shaft of the motor 31 which penetrates through the through hole 3221, and the first bevel gear 33 is vertically engaged with the second bevel gear 34 for transmitting the power provided by the motor 31 to the first rod 411 in the direction changed.

The advantage that sets up like this lies in, can make things convenient for the setting of motor and reduce the space that whole trimming mechanism took in left and right directions.

In this embodiment, the slider 43 includes the slider body 432 and the extension plate 433 of connection on the slider body 432, and the front end of extension plate 433 is connected with the boss 221 that is located the rear end of moving blade 22 and protrudes to the right, and the cover is equipped with tight circle 4111 on the first pole 411, and tight circle 4111 is located the right side of backup pad 10 and laminates mutually with backup pad 10, and tight circle 4111 is used for adjusting the degree of depth that the projection 413 stretches into waist type groove 431.

The invention also provides a sewing machine comprising the thread trimming mechanism of the sewing machine, and the sewing machine is convenient to operate, overhaul and adjust and wide in application range.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.