阅读说明：本技术 缝纫机的剪线抬压脚机构 (The thread-trimming lifter-presser foot mechanism of sewing machine ) 是由 张伟伟 何清 于 2019-10-16 设计创作，主要内容包括：本发明提供缝纫机的剪线抬压脚机构,包括步进电机、机壳、剪线连杆、剪线连杆轴、剪线驱动轴以及剪线组件,步进电机左侧轴端安装有剪线凸轮,机壳上安装有剪线轴套和剪线连杆轴套,剪线轴套上穿设有剪线驱动轴,剪线驱动轴的左端安装有剪线组件,剪线连杆轴套上穿设有剪线连杆轴,剪线连杆轴的右侧外端安装有剪线连杆,且通过第一剪线连杆轴位螺钉铰接,第一剪线连杆轴位螺钉外侧安装有第一滚柱,剪线连杆的另一端与剪线驱动轴端部连接,与现有技术相比,本发明具有如下的有益效果：实现了采用一个步进电机独立完成剪线和抬压脚的动作,减少产品成本,且通过电控程序控制步进电机的运行,降低了人员的工作量。(The thread-trimming lifter-presser foot mechanism of present invention offer sewing machine, including stepper motor, casing, trimming connecting rod, trimming pitman shaft, trimming drive shaft and trimming component, shaft end is equipped with trimming cam on the left of stepper motor, trimming axle sleeve and trimming connecting rod bearing are installed on casing, shear spool, which is put on, is equipped with trimming drive shaft, the left end of trimming drive shaft is equipped with trimming component, trimming pitman shaft is equipped on trimming connecting rod bearing, the right side outer end of trimming pitman shaft is equipped with trimming connecting rod, and it is hinged by the first trimming connecting rod axial screw, the first roller is installed on the outside of first trimming connecting rod axial screw, the other end of trimming connecting rod is connect with trimming driveshaft end, compared with prior art, the present invention is with following the utility model has the advantages that realizing the movement using a stepper motor complete independently trimming and presser foot lifter, reduce product cost, And by the operation of automatically controlled process control stepper motor, the workload of personnel is reduced.)

1. the thread-trimming lifter-presser foot mechanism of sewing machine, including stepper motor, trimming cam, trimming connecting rod, trimming pitman shaft, trimming drive Moving axis, trimming component, the first presser foot lifter crank, presser foot lifter cam, the second presser foot lifter crank, presser foot lifter axis and presser foot lifter group Part, it is characterised in that: the stepper motor both ends are separately installed with left motor mounting rack and right motor mounting rack, the left side Motor mounting rack and right motor mounting rack are respectively mounted and are fixed on casing, and shaft end is equipped with trimming on the left of the stepper motor Cam is equipped with trimming axle sleeve and trimming connecting rod bearing on the casing, and the shear spool, which is put on, is equipped with trimming drive shaft, and End face leans with trimming axle sleeve, and the left end of the trimming drive shaft is equipped with trimming component, wears on the trimming connecting rod bearing Equipped with trimming pitman shaft, and end face leans with trimming connecting rod bearing, and the right side outer end of the trimming pitman shaft is equipped with trimming Connecting rod, and it is hinged by the first trimming connecting rod axial screw, the first rolling is installed on the outside of the first trimming connecting rod axial screw Column, and by the installation positioning of the first nut, the other end of the trimming connecting rod is connect with trimming driveshaft end, and passes through second Trimming connecting rod axial screw is hinged, and shaft end is equipped with trimming cam, and trimming cam inside groove and first on the left of the stepper motor Roller is in rolling contact cooperation, and the trimming component and presser foot lifter component are held by automatically controlled process control, and by stepper motor driving Row.

2. the thread-trimming lifter-presser foot mechanism of sewing machine according to claim 1, it is characterised in that: be equipped with lift on the casing Presser feet support base is equipped with presser foot lifter axis on the presser foot lifter support base, is equipped with the second presser foot lifter on the right side of the presser foot lifter axis Crank, the second presser foot lifter crank is hinged by presser foot lifter axial screw with presser foot lifter component, peace on the left of the presser foot lifter axis Equipped with presser foot lifter cam, shaft end is equipped with the first presser foot lifter crank on the right side of the stepper motor, on the first presser foot lifter crank Second roller is installed, and hinged by axial screw, the cam surface of second roller and presser foot lifter cam, which is in rolling contact, matches It closes.

3. the thread-trimming lifter-presser foot mechanism of sewing machine according to claim 2, it is characterised in that: the presser foot lifter cam is envelope Close form.

4. the thread-trimming lifter-presser foot mechanism of sewing machine according to claim 2, it is characterised in that: the presser foot lifter cam is out Degree of lip-rounding formula.

5. the thread-trimming lifter-presser foot mechanism of sewing machine according to claim 2, it is characterised in that: pacify on the presser foot lifter cam Equipped with torsional spring, and torsional spring is mounted between presser foot lifter cam and presser foot lifter support base.

6. the thread-trimming lifter-presser foot mechanism of sewing machine according to claim 5, it is characterised in that: the torsional spring is using common solid Setting formula.

7. the thread-trimming lifter-presser foot mechanism of sewing machine according to claim 5, it is characterised in that: the torsional spring is solid using bolt Setting formula.

8. the thread-trimming lifter-presser foot mechanism of sewing machine according to claim 1, it is characterised in that: the stepper motor is by leading Line is electrically connected with encoder and motor position sensing chip respectively, and the encoder is Split encoder, and encoder is solid It is scheduled on the right side of right motor mounting rack, the motor position sensing chip is fixed on the axis on the right side of stepper motor.

9. the thread-trimming lifter-presser foot mechanism of sewing machine according to claim 1, it is characterised in that: a left side for the trimming pitman shaft Side is equipped with axis card.

Technical field

The present invention is the thread-trimming lifter-presser foot mechanism of sewing machine, belongs to technical field of sewing machines.

Background technique

Summary of the invention

In view of the deficienciess of the prior art, it is an object of the present invention to provide the thread-trimming lifter-presser foot mechanism of sewing machine, to solve The problems mentioned above in the background art, the present invention pass through the movement of stepper motor energy complete independently trimming and presser foot lifter, and mutually Do not interfere, two sets act a shared motor, reduce product cost.

To achieve the goals above, the present invention is to realize by the following technical solutions: the thread-trimming lifter-presser foot of sewing machine Mechanism, including stepper motor, trimming cam, trimming connecting rod, trimming pitman shaft, trimming drive shaft, trimming component, the first presser foot lifter Crank, presser foot lifter cam, the second presser foot lifter crank, presser foot lifter axis and presser foot lifter component, the stepper motor both ends are pacified respectively Equipped with left motor mounting rack and right motor mounting rack, the left motor mounting rack and right motor mounting rack are respectively mounted admittedly It is scheduled on casing, shaft end is equipped with trimming cam on the left of the stepper motor, and trimming axle sleeve and trimming are equipped on the casing Connecting rod bearing, the shear spool, which is put on, is equipped with trimming drive shaft, and end face leans with trimming axle sleeve, the trimming drive shaft Left end trimming component is installed, be equipped with trimming pitman shaft on the trimming connecting rod bearing, and end face and trimming connecting rod bearing It leaning, the right side outer end of the trimming pitman shaft is equipped with trimming connecting rod, and hinged by the first trimming connecting rod axial screw, First roller is installed, and by the installation positioning of the first nut, the trimming connects on the outside of the first trimming connecting rod axial screw The other end of bar is connect with trimming driveshaft end, and hinged by the second trimming connecting rod axial screw, and the stepper motor is left Side axle end is equipped with trimming cam, and trimming cam inside groove and the first roller are in rolling contact cooperation, the trimming component and lift pressure Foot component is driven by stepper motor and is executed by automatically controlled process control.

Further, presser foot lifter support base is installed on the casing, presser foot lifter is installed on the presser foot lifter support base Axis, the presser foot lifter axis right side are equipped with the second presser foot lifter crank, and the second presser foot lifter crank and presser foot lifter component pass through lift Presser feet axial screw is hinged, presser foot lifter cam is equipped on the left of the presser foot lifter axis, shaft end is equipped on the right side of the stepper motor First presser foot lifter crank is equipped with the second roller on the first presser foot lifter crank, and hinged by axial screw, and described second The cam surface of roller and presser foot lifter cam is in rolling contact cooperation.

Further, the presser foot lifter cam is closing form.

Further, the presser foot lifter cam is opening form.

Further, torsional spring is installed on the presser foot lifter cam, and torsional spring is mounted on presser foot lifter cam and presser foot lifter branch It supports between seat.

Further, the torsional spring uses common fixed form.

Further, the torsional spring is fixed by bolts form.

Further, the stepper motor is electrically connected with encoder and motor position sensing chip respectively by conducting wire, The encoder is Split encoder, and encoder is fixed on the right side of right motor mounting rack, the motor position sensing chip It is fixed on the axis on the right side of stepper motor.

Further, axis card is installed on the left of the trimming pitman shaft

Beneficial effects of the present invention: the thread-trimming lifter-presser foot mechanism of sewing machine of the invention realizes only using a stepper motor The vertical movement for completing trimming and presser foot lifter, and it is non-interference, two sets act a shared motor, reduce product cost, and pass through The operation of automatically controlled process control stepper motor, reduces the workload of personnel, has low noise, and trimming is stablized, and structure is simply easy The advantages that installation and debugging, solves the prior art and mostly uses magnet control trimming action, and artificial presser foot lifter is hard or electromagnetism Iron drives presser feet lifting noise big and the nonadjustable disadvantage of height.

Detailed description of the invention

Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention, Objects and advantages will become more apparent upon:

Fig. 1 is the structural schematic diagram of the thread-trimming lifter-presser foot mechanism of sewing machine of the present invention；

Fig. 2 is the structural schematic diagram of trimming cam in the thread-trimming lifter-presser foot mechanism of sewing machine of the present invention；

Fig. 3 is the right side view of trimming cam in the thread-trimming lifter-presser foot mechanism of sewing machine of the present invention；

Fig. 4 is the schematic diagram of the first trimming connecting rod axial screw in the thread-trimming lifter-presser foot mechanism of sewing machine of the present invention；

Fig. 5 is the schematic diagram of axial screw in the thread-trimming lifter-presser foot mechanism of sewing machine of the present invention；

Fig. 6 is the schematic diagram of torsional spring in the thread-trimming lifter-presser foot mechanism of sewing machine of the present invention；

Fig. 7 is the schematic diagram of closed type presser foot lifter cam in the thread-trimming lifter-presser foot mechanism of sewing machine of the present invention；

Fig. 8 is that the thread-trimming lifter-presser foot mechanism split shed formula of sewing machine of the present invention covers the schematic diagram of presser feet；

Fig. 9 is the schematic diagram of another embodiment of the thread-trimming lifter-presser foot mechanism of sewing machine of the present invention；

In figure: the left motor mounting rack of 1-, the right motor mounting rack of 2-, 3- stepper motor, 4- trimming cam, 5- trimming axle sleeve, 6- trimming drive shaft, 7- trimming component, 8- trimming pitman shaft, 9- trimming connecting rod bearing, 10- trimming connecting rod, the first trimming of 11- connect Bar axial screw, the first roller of 12-, the first nut of 13-, 14- the second trimming connecting rod axial screw, 15- presser foot lifter support base, 16- presser foot lifter axis, the second presser foot lifter of 17- crank, 18- presser foot lifter component, 19- presser foot lifter axial screw, 20- presser foot lifter cam, 21- torsional spring, the first presser foot lifter of 22- crank, the second roller of 23-, 24- axial screw, 25- axis card, the second nut of 26-, 27- coding Device, 28- motor position sensing chip.

Specific embodiment

To be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, below with reference to Specific embodiment, the present invention is further explained.

Fig. 1 to Fig. 8 is please referred to, the present invention provides a kind of technical solution: the thread-trimming lifter-presser foot mechanism of sewing machine, including stepping Motor 3, trimming cam 4, trimming connecting rod 10, trimming pitman shaft 8, trimming drive shaft 6, trimming component 7, the first presser foot lifter crank 22, presser foot lifter cam 20, the second presser foot lifter crank 17, presser foot lifter axis 16 and presser foot lifter component 18,3 both ends of stepper motor difference Left motor mounting rack 1 and right motor mounting rack 2 are installed, left motor mounting rack 1 and right motor mounting rack 2 are respectively mounted It is fixed on casing, 3 left side shaft end of stepper motor is equipped with trimming cam 4, and trimming axle sleeve 5 and trimming connecting rod are equipped on casing Axle sleeve 9 is equipped with trimming drive shaft 6 on trimming axle sleeve 5, and end face leans with trimming axle sleeve 5, the left end of trimming drive shaft 6 Trimming component 7 is installed, trimming pitman shaft 8 is equipped on trimming connecting rod bearing 9, and end face leans with trimming connecting rod bearing 9, The right side outer end of trimming pitman shaft 8 is equipped with trimming connecting rod 10, and hinged by the first trimming connecting rod axial screw 11, and first cuts First roller 12 is installed, and by the installation positioning of the first nut 13 on the outside of line connecting rod axial screw 11, trimming connecting rod 10 it is another One end is connect with 6 end of trimming drive shaft, and hinged by the second trimming connecting rod axial screw 14,3 left side shaft end of stepper motor Trimming cam 4 is installed, and 4 inside groove of trimming cam and the first roller 12 are in rolling contact cooperation, trimming component 7 and presser foot lifter component 18 by automatically controlled process control, and is driven and executed by stepper motor 3, and stepper motor 3 rotates forward, and drives trimming cam 4 to rotate, trimming The first roller 12 moves in 4 driver slot of cam, and trimming connecting rod 10 is driven to move, and trimming connecting rod 10 is driven by trimming drive shaft 6 Trimming component 7 completes trimming action, and the reversion of stepper motor 3 drives trimming cam 4 when resetting to initial position after the completion of trimming Rotation so that trimming component 7 is returned to state, when stepper motor 3 execute drive trimming action when, 3 right end of stepper motor First presser foot lifter crank 22 and the second presser foot lifter cam 20 are in separated position, and presser foot lifter is not had an effect, when stepper motor 3 exists When executing driving presser foot lifter movement, it is in the unchanged band of position of trimming cam 4 in 3 the first roller of left end 12 of stepper motor, is cut Line is not had an effect, easy to operate, and using effect is good, the movement of stepper motor 3 energy complete independently trimming and presser foot lifter, and mutually not Interference, two sets act a shared motor, reduce product cost, and driven using stepper motor, have low noise, trimming Stablize, structure simply debugging easy to install the advantages that.

Presser foot lifter support base 15 is installed on casing, presser foot lifter axis 16, presser foot lifter axis are installed on presser foot lifter support base 15 16 right sides are equipped with the second presser foot lifter crank 17, and the second presser foot lifter crank 17 passes through presser foot lifter axial screw with presser foot lifter component 18 19 is hinged, presser foot lifter cam 20 is equipped on the left of presser foot lifter axis 16,3 right side shaft end of stepper motor is equipped with the first presser foot lifter crank 22, the second roller 23 is installed, and hinged by axial screw 24 on first presser foot lifter crank 22, the second roller 23 and presser foot lifter The cam surface of cam 20 is in rolling contact cooperation, and stepper motor 3 inverts, and drives the rotation of the first presser foot lifter crank 22, the first presser foot lifter The second roller 23 on crank 22 drives presser foot lifter cam 20 to move, and presser foot lifter cam 20 is pressed by presser foot lifter axis 16 and the second lift Foot crank 17 drives presser foot lifter component 18, and presser foot lifter component 18 is made to complete presser foot lifter movement.

Presser foot lifter cam 20 is closing form.

Presser foot lifter cam 20 is opening form.

Torsional spring 21 is installed, and torsional spring 21 is mounted on presser foot lifter cam 20 and presser foot lifter support base 15 on presser foot lifter cam 20 Between, convenient for being resetted to presser foot lifter cam 20.

Torsional spring 21 uses common fixed form.

Torsional spring 21 is fixed by bolts form, expands the fixed form to torsional spring 21.

Stepper motor 3 is electrically connected with encoder 27 and motor position sensing chip 28 respectively by conducting wire, encoder 27 For Split encoder 27, and encoder 27 is fixed on right 2 right side of motor mounting rack, and motor position sensing chip 28 is fixed on step Into on the axis on 3 right side of motor, realizes and automatically controlled process control is carried out to stepper motor 3.

The left side of trimming pitman shaft 8 is equipped with axis card 25, convenient for limiting to the first roller 12.

Referring to Fig. 9, as an embodiment of the present invention: 6 one end of trimming drive shaft is equipped with trimming component 7, trimming The other end of drive shaft 6 is equipped with axial screw 24, and the first roller 12 is equipped on axial screw 24, pacifies on stepper motor 3 Dress is fixed with trimming cam 4, and the first roller 12 is in contact with the cam surface of trimming cam 4, and stepper motor 3 drives trimming cam 4, It drives trimming drive shaft 6 to move by the first roller 12, finally trimming component 7 is driven to complete trimming action.

The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification For the equivalent embodiment of equivalent variations, but anything that does not depart from the technical scheme of the invention content, according to the technical essence of the invention Any simple modification, equivalent change and modification to the above embodiments, all of which are still within the scope of the technical scheme of the invention.