CN108360159B

CN108360159B - Smooth cloth pressing driving mechanism of sewing machine, cloth pressing device and sewing machine

Info

Publication number: CN108360159B
Application number: CN201810204191.1A
Authority: CN
Inventors: 黄广建
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-04-15
Filing date: 2016-04-15
Publication date: 2020-08-25
Anticipated expiration: 2036-04-15
Also published as: CN105671800B; CN105671800A; CN108360159A

Abstract

The invention provides a smooth cloth pressing driving mechanism of a sewing machine, which breaks through the structural form of the traditional cloth pressing driving mechanism of the sewing machine, is additionally provided with an auxiliary driving mechanism for independently driving a presser foot or a rear tug, can synchronously drive the presser foot and the rear tug through a main driving mechanism, and can also independently drive the presser foot or the rear tug through the auxiliary driving mechanism when needed, so that cloth is always pressed by the presser foot or the rear tug, the cloth is not easy to move and dislocate to influence sewing, the sewing operation is smoother, the efficiency is high, the structure is novel and reasonable, the operation is flexible, and the practicability is strong. The invention also provides a cloth pressing device manufactured by the cloth pressing driving mechanism, which has the beneficial effects. The invention also provides a sewing machine which also has the beneficial effects.

Description

Smooth cloth pressing driving mechanism of sewing machine, cloth pressing device and sewing machine

The invention discloses a cloth pressing driving mechanism of a sewing machine, a cloth pressing device and the sewing machine, which are filed by division of Chinese patent application No. 2016102357173, wherein the original application No. is 2016102357173, and the application date is 2016, 04 and 15.

Technical Field

The invention relates to the field of machinery, in particular to a smooth cloth pressing driving mechanism of a sewing machine, a cloth pressing device and the sewing machine.

Background

The structure of the sewing machine is known, most of the presser feet and the rear tug wheels of the traditional sewing machine are synchronously driven to lift by the same driving mechanism, although the lifting efficiency of the presser feet and the rear tug wheels can be ensured by the structure, the structure brings inconvenience in the actual use process, for example, when only one of the presser feet and the rear tug wheels is required to be lifted, the cloth is in a state of not being pressed, and then the cloth shifting dislocation occurs to influence the sewing condition.

In order to solve the problems, the chinese patent CN 201510439614.4 discloses a sewing machine based on a full-automatic template split synchronizing wheel device, which comprises a sewing machine main body, wherein a tug lifting and pressing mechanism and a presser foot lifting and pressing mechanism are arranged on the sewing machine main body, a casing rear cover plate of the sewing machine main body is provided with a lifting and pressing tug electromagnet, the lifting and pressing tug electromagnet drives a tug crankshaft to rotate, one end of the tug crankshaft extends into the casing, a shift lever part of the tug crankshaft abuts against the right end of a tug lifting right lever, a rotation fulcrum of the tug lifting right lever is arranged on the casing, and the left end of the tug lifting right lever is connected to the tug lifting and pressing mechanism through a tug lifting pull rod; the right end of the tow boat lifting right lever is connected with a knee-control lifting ejector rod, the lower end of the knee-control lifting ejector rod extends out of the machine shell and is connected with a knee-control lifting device on the oil disc, and the tow boat lifting right lever is driven by the lifting of the knee-control ejector rod to further drive the tow boat lifting mechanism. The presser foot lifting mechanism is characterized in that a presser foot lifting electromagnet is arranged in the machine shell, an output rod of the presser foot lifting electromagnet is abutted to the right end of the presser foot lifting right lever, a rotating fulcrum of the presser foot lifting right lever is installed on the machine shell, and the left end of the presser foot lifting right lever is connected to the presser foot lifting mechanism through a presser foot lifting pull rod. The needle plate of the sewing machine main body is provided with a lower guide sleeve for a needle to pass through and hook, and the lower guide sleeve can be embedded into a guide groove on the matched template. The needle plate is provided with rubber step feeding teeth and plastic high and low pressure pins. The sewing machine main body also comprises an induction device, the induction device is used for detecting that a machine needle passes through the cloth in an upward mode and sending a control signal to the controller, and the controller controls the stepping motor on the rear side of the shell to be started according to the signal; the induction device sends a control signal to the controller when the machine needle moves downwards to penetrate into the cloth, the controller controls the stepping motor at the rear side of the machine shell to pause according to the signal, and a motor shaft of the stepping motor drives the tug to run through the universal coupling; the stepping motor, the mop mechanism, the universal coupling and the tugboat lifting mechanism form the mop machine. And the surface of the tug is provided with a silica gel wheel. The invention has the effect that the mop wheel (rear mop wheel) is lifted independently and the presser foot keeps the cloth pressing state, but in the actual use process, the presser foot is often required to be lifted independently and the mop wheel is required to press cloth, so the practicability of the invention is still to be improved.

Accordingly, the present inventors have made extensive studies to solve the above problems and have made the present invention.

Disclosure of Invention

The invention aims to provide a smooth cloth pressing driving mechanism of a sewing machine, which has the advantages of smooth sewing operation, high efficiency, novel and reasonable structure, flexible operation and strong practicability.

The invention also aims to provide the cloth pressing device which is smoother and smoother in sewing operation, high in efficiency, novel and reasonable in structure, flexible in operation and high in practicability.

The invention also aims to provide the sewing machine which is smoother and smoother in sewing operation, high in efficiency, novel and reasonable in structure, flexible in operation and strong in practicability.

In order to achieve the purpose, the invention adopts the following technical scheme:

a smooth cloth pressing driving mechanism of a sewing machine comprises a main driving mechanism for synchronously driving a presser foot and a rear tug; the main driving mechanism comprises a first main driving mechanism for driving the presser foot and a second main driving mechanism for driving the rear tug;

the first main driving mechanism comprises a first lifting driving component for driving the presser foot to lift and a first push-pull driving component for driving the first lifting driving component to push and pull; the first push-pull driving part is pivoted with the first lifting driving part through a first driving shaft, and a first shaft hole matched with the first driving shaft is formed in the first push-pull driving part;

and/or the second main driving mechanism comprises a second lifting driving component for driving the rear tug to lift and a second push-pull driving component for driving the second lifting driving component to push and pull; the second push-pull driving part is pivoted with the second lifting driving part through a second driving shaft, and a second shaft hole matched with the second driving shaft is formed in the second push-pull driving part;

the auxiliary driving mechanism is used for independently driving the presser foot or the rear tug; the auxiliary driving mechanism comprises an auxiliary push-pull driving component for pushing and pulling the first lifting driving component or the second lifting driving component;

the first shaft hole is formed with a space in which the first drive shaft is freely movable when the auxiliary push-pull driving member pushes and pulls the first elevation driving member; or the second shaft hole is formed with a space for the second driving shaft to freely move when the auxiliary push-pull driving component pushes and pulls the second lifting driving component;

the main driving mechanism also comprises a main driving part for driving the first push-pull driving part and the second push-pull driving part in a push-pull manner, and a main power device for driving the main driving part;

the first push-pull driving part and the second push-pull driving part are of long strip structures, the first push-pull driving part is provided with a second power input end connected with the main driving part and a second power output end connected with the first driving shaft, and the second push-pull driving part is provided with a third power input end connected with the main driving part and a third power output end connected with the second driving shaft;

the main driving part comprises a lever, a first connecting rod for performing push-pull driving on the first push-pull driving part and a second connecting rod for performing push-pull driving on the second push-pull driving part; the lever is provided with a fourth power input end driven by the main power device and a fourth power output end for driving the first connecting rod and the second connecting rod; a fourth swing fulcrum rotating shaft is arranged between the two ends of the lever;

the first connecting rod is provided with a fifth power input end connected with the fourth power output end and a fifth power output end which is pivoted with the second power input end through a sixth driving shaft; the second connecting rod is provided with a sixth power input end connected with the fourth power output end, and a sixth power output end which is pivoted with the third power input end through a seventh driving shaft.

The auxiliary push-pull driving part is pivoted with the first lifting driving part through the first driving shaft, or the auxiliary push-pull driving part is pivoted with the second lifting driving part through the second driving shaft.

The first shaft hole is a strip-shaped hole, and the auxiliary push-pull driving part pushes and pulls the first driving shaft along the length direction of the first shaft hole; or, the second shaft hole is a strip-shaped hole, and the auxiliary push-pull driving part pushes and pulls the second driving shaft along the length direction of the second shaft hole.

The auxiliary push-pull driving part is of a strip-shaped structure; the auxiliary driving mechanism also comprises an auxiliary driving part for driving the auxiliary push-pull driving part in a push-pull manner, and an auxiliary power device for driving the auxiliary driving part in a swinging manner; the auxiliary driving component is bent and comprises a first swinging part and a second swinging part, wherein the first swinging part drives the auxiliary push-pull driving component, the second swinging part is driven by the auxiliary power device, and when the second swinging part is driven by the auxiliary power device, the first swinging part generates swinging motion for carrying out push-pull driving on the auxiliary push-pull driving component; the auxiliary push-pull driving component is provided with a first power input end connected with the first swinging part and a first power output end connected with the first lifting driving component or the second lifting driving component; the first swinging part is pivoted with the first power input end through a third driving shaft; and a first swing fulcrum rotating shaft is arranged between the two ends of the auxiliary driving part.

The first swing fulcrum rotating shaft is arranged at the bending part of the auxiliary driving part.

The first swing fulcrum rotating shaft is provided with a support connected with the sewing machine body in a matching mode.

The auxiliary power device is provided with an auxiliary power output rod vertically arranged from top to bottom, the auxiliary push-pull driving component is arranged along the transverse direction, the first swinging portion is arranged upwards, the second swinging portion is arranged towards the transverse direction and is opposite to the auxiliary push-pull driving component in direction, and a force bearing portion correspondingly located below the end portion of the auxiliary power output rod is formed at the end portion of the second swinging portion.

The auxiliary driving part is of a sheet structure, and the force bearing part is of a transverse sheet structure perpendicular to the plane of the auxiliary driving part.

The first lifting driving component is bent and comprises a third swinging part for driving the presser foot and a fourth swinging part connected with the first driving shaft, and when the fourth swinging part is driven by the first driving shaft, the third swinging part generates swinging motion for driving the presser foot to lift; the third swinging part is pivoted with the presser foot through a fourth driving shaft; a second swing fulcrum rotating shaft is arranged between the two ends of the first lifting driving part;

and/or the second lifting driving component is bent and comprises a fifth swinging part for driving the rear tug and a sixth swinging part connected with the second driving shaft, and after the sixth swinging part is driven by the second driving shaft, the fifth swinging part generates swinging motion for lifting and driving the rear tug; the fifth swinging part is pivoted with the rear tug through a fifth driving shaft; and a third swing fulcrum rotating shaft is arranged between the two ends of the second lifting driving part.

The second swing fulcrum rotating shaft is arranged at the bending position of the first lifting driving part, and/or the third swing fulcrum rotating shaft is arranged at the bending position of the second lifting driving part.

The fourth driving shaft is provided with a switching rod, one end of the switching rod is pivoted with the fourth driving shaft, and the other end of the switching rod is pivoted with the presser foot.

The first push-pull driving component is arranged in the transverse direction, the fourth swinging part is arranged upwards, and the third swinging part is arranged in the transverse direction and opposite to the second swinging part in direction; and/or the second push-pull driving component is arranged towards the transverse direction, the sixth swinging part is arranged upwards, and the fifth swinging part is arranged towards the transverse direction and is opposite to the direction of the second swinging part;

the adapter rod is arranged towards the presser foot from top to bottom.

And the fourth power output end is provided with an eighth driving shaft, and the first connecting rod and the second connecting rod are respectively arranged at two sides of the lever and are respectively connected with the eighth driving shaft together.

The main power device is provided with a main power output rod vertically arranged from top to bottom, the lever is transversely arranged, the power output ends of the first connecting rod and the second connecting rod are arranged up, and the fourth power input end is correspondingly located below the end part of the main power output rod.

The first and second links are each at an acute angle to the lever.

A cloth pressing device further comprises a presser foot and a rear tug.

The presser foot is pivoted with the adapter rod through the lifting slide rod.

The lifting slide bar is vertically arranged and is provided with a guide sliding sleeve connected with the sewing machine main body in a matching mode.

A sewing machine further includes a sewing machine main body.

The support is connected with the sewing machine main body; the second swing fulcrum rotating shaft, the third swing fulcrum rotating shaft and the fourth swing fulcrum rotating shaft are respectively connected with the sewing machine main body together.

After the technical scheme is adopted, the smooth cloth pressing driving mechanism of the sewing machine breaks through the structural form of the cloth pressing driving mechanism of the traditional sewing machine, the auxiliary driving mechanism for independently driving the presser foot or the rear tug is additionally arranged, in the actual use process, the main driving mechanism can synchronously drive the presser foot and the rear tug, the auxiliary driving mechanism can independently drive the presser foot or the rear tug when needed, so that cloth is always pressed by the presser foot or the rear tug, and the cloth is not easy to move and dislocate to influence sewing. The device is specifically operated in such a way that the main driving mechanism drives the presser foot through the first main driving mechanism and drives the rear tug through the second main driving mechanism; the first main driving mechanism utilizes the first driving shaft to carry out push-pull driving on the first lifting driving component through the first push-pull driving component, when the auxiliary driving mechanism drives the presser foot independently, no matter what the structure of the second main driving mechanism is, the auxiliary driving mechanism replaces the first push-pull driving component through the auxiliary push-pull driving component to carry out push-pull driving on the first lifting driving component, so that the first lifting driving component drives the presser foot to lift, and in the process of carrying out push-pull driving on the first lifting driving component through the auxiliary push-pull driving component, the first driving shaft utilizes redundant space of the first shaft hole to move freely without being influenced by the first shaft hole and the first push-pull driving component; or the second main driving mechanism drives the second lifting driving component in a push-pull mode through the second push-pull driving component by using the second driving shaft, when the auxiliary driving mechanism drives the rear tug independently, the auxiliary driving mechanism drives the second lifting driving component in a push-pull mode through the auxiliary push-pull driving component instead of the second push-pull driving component no matter what the structure of the first main driving mechanism is, so that the second lifting driving component drives the rear tug in a lifting mode, and in the process that the auxiliary push-pull driving component drives the second lifting driving component in a push-pull mode, the second driving shaft can move freely by using the redundant space of the second shaft hole and cannot be influenced by the second shaft hole and the second push-pull driving component; of course, the first main drive mechanism may push-pull the first elevation drive member by the first drive shaft via the first push-pull drive member, and the second main drive mechanism may push-pull the second elevation drive member by the second drive shaft via the second push-pull drive member, but the sub drive mechanism may drive the presser foot or the rear tug independently. The main power device drives the main driving component, and the main driving component drives the first push-pull driving component and the second push-pull driving component in a push-pull mode. The main power device drives a fourth power input end of the lever, the lever swings by taking a fourth swing fulcrum rotating shaft as a fulcrum, a fourth power output end of the lever drives the first connecting rod and the second connecting rod, the first connecting rod drives the first push-pull driving component through a fifth power output end by using a sixth driving shaft, and the second connecting rod drives the second push-pull driving component through a sixth power output end by using a seventh driving shaft. The structure principle is ingenious, the structure is simple, and the action is smooth. Compared with the prior art, the smooth cloth pressing driving mechanism of the sewing machine can synchronously drive the presser foot and the rear tug through the main driving mechanism, and can also independently drive the presser foot or the rear tug through the auxiliary driving mechanism when needed, so that cloth is always pressed by the presser foot or the rear tug, the cloth is not easy to move and dislocate to influence sewing, the sewing operation is smoother, the efficiency is high, the structure is novel and reasonable, the operation is flexible, and the practicability is strong.

The invention also provides a cloth pressing device manufactured by the cloth pressing driving mechanism, which has the beneficial effects.

The invention also provides a sewing machine which also has the beneficial effects.

Drawings

FIG. 1 is a first partial schematic of the present invention;

FIG. 2 is a second partial structural view of the present invention;

fig. 3 is a third partial structural diagram of the present invention.

In the figure:

1-first main driving mechanism 11-first lifting driving component 111-third swinging part 112-fourth swinging part 113-fourth driving shaft 1131-adapter rod 114-second swinging fulcrum rotating shaft 12-first push-pull driving component 121-second power input end 122-second power output end 13-first driving shaft 14-first shaft hole

2-second main driving mechanism 21-second lifting driving component 211-fifth swinging component 212-sixth swinging component 213-fifth driving shaft 214-third swinging fulcrum rotating shaft 22-second push-pull driving component 221-third power input end 222-third power output end 23-second driving shaft 24-second shaft hole

3-auxiliary driving mechanism 31-auxiliary push-pull driving component 311-first power input end 312-first power output end 32-auxiliary driving component 321-first swinging part 322-second swinging part 3221-force bearing part 323-third driving shaft 324-first swinging fulcrum rotating shaft 3241-support 33-auxiliary power device 331-auxiliary power output rod

4-main drive component 41-lever 411-fourth power input 412-fourth power output 413-fourth swing fulcrum shaft 414-eighth drive shaft 42-first link 421-fifth power input 422-sixth drive shaft 423-fifth power output 43-second link 431-sixth power input 432-seventh drive shaft 433-sixth power output

5-main power device 51-main power output rod

6-presser foot 61-lifting slide bar 62-guiding sliding sleeve.

Detailed Description

In order to further explain the technical solution of the present invention, the following detailed description is given by way of specific examples.

A first embodiment of a smooth cloth pressing drive mechanism of a sewing machine according to the present invention, as shown in fig. 1 and 2, includes a main drive mechanism for synchronously driving a presser foot 6 and a rear tug (not shown in the figure); the main drive mechanism includes a first main drive mechanism 1 that drives the presser foot 6 and a second main drive mechanism 2 that drives the rear tug.

The first main driving mechanism 1 includes a first elevation driving member 11 for driving the presser foot 6 to be elevated, and a first push-pull driving member 12 for driving the first elevation driving member 11 to be pushed and pulled; the first push-pull driving part 12 is pivoted with the first lifting driving part 11 through a first driving shaft 13, and a first shaft hole 14 matched with the first driving shaft 13 is formed in the first push-pull driving part 12;

the second main driving mechanism 2 includes a second elevation driving member 21 for driving the rear tug to be elevated, and a second push-pull driving member 22 for pushing and pulling the second elevation driving member 21; the second push-pull driving component 22 is pivoted with the second lifting driving component 21 through a second driving shaft 23, and a second shaft hole 24 matched with the second driving shaft 23 is formed in the second push-pull driving component 22;

the auxiliary driving mechanism 3 is used for driving the presser foot 6 independently; the sub drive mechanism 3 includes a sub push-pull drive member 31 for pushing and pulling the first elevation drive member 11;

the first shaft hole 14 is formed with a space in which the first drive shaft 13 is freely movable when the sub push-pull drive member 31 pushes and pulls the first elevation drive member 11. The invention is additionally provided with the auxiliary driving mechanism 3 for independently driving the presser foot 6, in the actual use process, the main driving mechanism can synchronously drive the presser foot 6 and the rear tug, and the auxiliary driving mechanism 3 can independently drive the presser foot 6 when needed, so that the cloth is always pressed by the rear tug, and the cloth is not easy to move and dislocate to influence the sewing. Specifically, the main driving mechanism drives the presser foot 6 through the first main driving mechanism 1 and drives the rear tug through the second main driving mechanism 2; the first main driving mechanism 1 performs push-pull driving on the first lifting driving component 11 through the first push-pull driving component 12 by using the first driving shaft 13, the second main driving mechanism 2 performs push-pull driving on the second lifting driving component 21 through the second push-pull driving component 22 by using the second driving shaft 23, when the auxiliary driving mechanism 3 performs single driving on the presser foot 6, the auxiliary driving mechanism 3 performs push-pull driving on the first lifting driving component 11 through the auxiliary push-pull driving component 31 instead of the first push-pull driving component 12, and further enables the first lifting driving component 11 to perform lifting driving on the presser foot 6, and in the process of performing push-pull driving on the first lifting driving component 11 through the auxiliary push-pull driving component 31, the first driving shaft 13 performs free movement by using the redundant space of the first shaft hole 14 without being influenced by the first shaft hole 14 and the first push-pull driving component 12.

Preferably, the secondary push-pull driving member 31 is pivotally connected to the first elevation driving member 11 by a first driving shaft 13. That is, the sub push-pull driving member 31 and the first push-pull driving member 12 share the first driving shaft 13, and the structure is more simple and compact.

Preferably, the first shaft hole 14 is a strip-shaped hole, and the sub push-pull driving member 31 pushes and pulls the first driving shaft 13 in the longitudinal direction of the first shaft hole 14. This structure allows the first shaft hole 14 to be aligned with the path of the first drive shaft 13, and when the sub push-pull drive member 31 drives the first elevation drive member 11 by the first drive shaft 13, the sub push-pull drive member is not affected by the first shaft hole 14 and the first push-pull drive member 12, and the operation is flexible and smooth.

In order to implement the structure of the secondary driving mechanism 3 more specifically, it is preferable that the secondary push-pull driving member 31 is a long strip structure (the long strip structure may be a long strip sheet or a long strip cylindrical rod, a polygonal rod, etc.); the auxiliary driving mechanism 3 further includes an auxiliary driving member 32 for driving the auxiliary push-pull driving member 31 to push and pull, and an auxiliary power unit 33 for driving the auxiliary driving member 32 to swing; the sub driving member 32 is bent and includes a first swing portion 321 for driving the sub push-pull driving member 31 and a second swing portion 322 driven by the sub power unit 33, and when the second swing portion 322 is driven by the sub power unit 33, the first swing portion 321 generates a swing motion for push-pull driving the sub push-pull driving member 31; the sub push-pull driving member 31 has a first power input terminal 311 connected to the first swing part 321, and a first power output terminal 312 connected to the first elevation driving member 11; the first swing part 321 is pivoted with the first power input end 311 through a third driving shaft 323; a first swing fulcrum shaft 324 is disposed between both ends of the sub-driving member 32. In actual use, the sub power unit 33 swings the sub driving member 32, and causes the first swing portion 321 to swing to push and pull the sub push-pull driving member 31 with the first swing fulcrum shaft 324 as a fulcrum, and the sub push-pull driving member 31 further pushes and pulls the first elevation driving member 11. The structure principle is ingenious, the structure is simple, and the action is smooth.

Preferably, the first swing fulcrum rotation shaft 324 is provided at a bent portion of the sub-driving member 32. This structure can increase the balanced swing amplitude of the first swing portion 321 and the second swing portion 322 and enhance the swing flexibility.

Preferably, the first swing fulcrum shaft 324 is provided with a support 3241 coupled to a sewing machine body (not shown). Namely, the first swing fulcrum rotating shaft 324 is supported by the support 3241, so that the stability is improved.

Preferably, the secondary power unit 33 has a secondary power take-off 331 vertically arranged from top to bottom, the secondary push-pull driving member 31 is arranged along the horizontal direction, the first swing portion 321 is arranged upward, the second swing portion 322 is arranged along the horizontal direction and opposite to the orientation of the secondary push-pull driving member 31, and the end of the second swing portion 322 is formed with a force bearing portion 3221 correspondingly below the end of the secondary power take-off 331. In actual use, the auxiliary power unit 33 drives the force-bearing portion 3221 downward by the auxiliary power output rod 331, so that the second swing portion 322 drives the first swing portion 321 to swing, and drives the auxiliary push-pull driving member 31 to push and pull in a direction close to the horizontal direction.

In order to realize a specific structure of the secondary driving part 3, it is preferable that the secondary driving part 3 is a lamellar structure, and the force bearing portion 3221 is a transverse lamellar structure perpendicular to the plane of the secondary driving part 33. The structure is simple, the manufacture is convenient, and the cost is low.

Preferably, the first elevation driving member 11 is formed in a bent shape, and includes a third swing portion 111 for driving the presser foot 6 and a fourth swing portion 112 connected to the first driving shaft 13, and when the fourth swing portion 112 is driven by the first driving shaft 13, the third swing portion 111 generates a swing motion for driving the presser foot 6 to be elevated; the third swinging part 111 is pivoted with the presser foot 6 through a fourth driving shaft 113; a second swing fulcrum rotating shaft 114 is arranged between the two ends of the first lifting driving part 11;

the second elevation driving member 21 is bent and includes a fifth swing part 211 for driving the rear tug and a sixth swing part 212 connected to the second driving shaft 23, and when the sixth swing part 212 is driven by the second driving shaft 23, the fifth swing part 211 performs an elevation driving swing motion on the rear tug; the fifth swing part 211 is pivoted with the rear tug through a fifth driving shaft 211; a third swing fulcrum shaft 214 is disposed between both ends of the second elevation driving member 21. In actual use, the first driving shaft 13 drives the first elevation driving member 11 to swing, and the third swing portion 111 drives the presser foot 6 to move up and down by using the second swing fulcrum shaft 114 as a fulcrum. The second driving shaft 23 swings the second elevation driving member 21, and causes the fifth swing portion 211 to perform an elevation driving operation on the rear tug using the third swing fulcrum shaft 214 as a fulcrum. The structure principle is ingenious, the structure is simple, and the action is smooth.

Preferably, the second swing fulcrum rotating shaft 114 is disposed at the bending position of the first elevation driving member 11, and the third swing fulcrum rotating shaft 214 is disposed at the bending position of the second elevation driving member 21. This structure can increase the balanced swing amplitudes of the third and

fourth swing parts

111 and 112, and the fifth and

sixth swing parts

211 and 212, and enhance the swing flexibility.

Preferably, the fourth driving shaft 113 is provided with an adapter 1131 having one end pivotally connected to the fourth driving shaft 113 and the other end pivotally connected to the presser foot 6. In the practical use process, the adapter 1131 serves as an adapter, so that the effect of flexibly driving the presser foot 6 by the fourth driving shaft 113 can be achieved, the adapter 1131 can rotate at will to adapt to the change of parameters such as angles, distances and the like between corresponding components in the movement process, and the structure is simple and reasonable.

Preferably, the first push-pull driving member 12 is disposed toward the lateral direction, the fourth swing portion 112 is disposed upward, and the third swing portion 111 is disposed toward the lateral direction and opposite to the second swing portion 322; the second push-pull driving member 22 is disposed in the lateral direction, the sixth swing portion 212 is disposed upward, and the fifth swing portion 211 is disposed in the lateral direction and in the opposite direction to the second swing portion 322; the adapter bar 1131 is arranged from top to bottom towards the presser foot 6. In the actual use process, the first push-pull driving member 12 pushes and pulls the fourth swinging part 112 to swing in the direction close to the horizontal direction, and then the third swinging part 111 drives the presser foot 6 to lift by using the adapter bar 1131; the second push-pull driving member 22 pushes and pulls the sixth swing portion 212 in a nearly horizontal direction to swing, and the fifth swing portion 211 drives the rear tug to ascend and descend.

In order to realize a complete structure of the main drive mechanism, it is preferable that the main drive mechanism further includes a main drive part 4 that push-pull drives the first push-pull drive part 12 and the second push-pull drive part 22, and a main power device 5 that drives the main drive part 4. In actual use, the main power unit 5 drives the main driving member 4, and the main driving member 4 drives the first push-pull driving member 12 and the second push-pull driving member 22 in a push-pull manner.

Preferably, the first push-pull driving member 11 and the second push-pull driving member 22 are in an elongated structure, the first push-pull driving member 11 has a second power input end 121 connected to the main driving member 4 and a second power output end 122 connected to the first driving shaft 13, the second push-pull driving member 22 has a third power input end 221 connected to the main driving member 4 and a third power output end 222 connected to the second driving shaft 23;

the main driving member 4 includes a lever 41, a first link 42 for driving the first push-pull driving member 12 and a second link 43 for driving the second push-pull driving member 22; the lever 41 has a fourth power input 411 driven by the main power unit 5, and a fourth power output 412 driving the first link 42 and the second link 43; a fourth swing fulcrum rotating shaft 413 is arranged between two ends of the lever 41;

the first link 42 has a fifth power input 421 connected to the fourth power output 412 and a fifth power output 423 pivotally connected to the second power input 121 by a sixth drive shaft 422; the second link 43 has a sixth power input end 431 connected to the fourth power output end 412 and a sixth power output end 433 pivotally connected to the third power input end 221 by a seventh drive shaft 432. In actual use, the main power device 5 drives the fourth power input end 411 of the lever 41, the lever 41 swings by using the fourth swing fulcrum rotating shaft 413 as a fulcrum, the fourth power output end 412 of the lever 41 drives the first connecting rod 42 and the second connecting rod 43, the first connecting rod 42 drives the first push-pull driving member 12 by using the sixth driving shaft 422 through the fifth power output end 423, and the second connecting rod 43 drives the second push-pull driving member 22 by using the seventh driving shaft 432 through the sixth power output end 433. The structure principle is ingenious, the structure is simple, and the action is smooth.

Preferably, the fourth power output end 412 is provided with an eighth driving shaft 414, and the first link 42 and the second link 43 are respectively provided at both sides of the lever 41 and are respectively connected with the eighth driving shaft 414. In practical use, the eighth driving shaft 414 can simultaneously drive the first link 42 and the second link 43, and further simultaneously drive the first push-pull driving member 12 and the second push-pull driving member 22, so as to synchronously drive the presser foot 6 and the rear tug.

Preferably, the main power device 5 has a main power output rod 51 vertically arranged from top to bottom, the lever 41 is arranged along the transverse direction, the power output ends of the first connecting rod 42 and the second connecting rod 43 are both arranged upward, and the fourth power input end 411 is correspondingly arranged below the end part of the main power output rod 51. In actual use, the main power device 5 drives the lever 41 downward through the main power output rod 51, and the lever 41 swings by using the fourth swing fulcrum rotating shaft 413 as a fulcrum, thereby driving the first link 42 and the second link 43.

Preferably, the first link 42 and the second link 43 are each at an acute angle to the lever 41. Thus, when the fourth power output end 412 of the lever 41 is pried upward, the power output ends of the first link 42 and the second link 43 are pushed upward and pull the first push-pull driving member 12 and the second push-pull driving member 22 backward, thereby generating a pulling motion on the first elevation driving member 11 and the second elevation driving member 21, and further pulling up the presser foot 6 and the rear tug upward by the third swinging portion 111 and the fifth swinging portion 211, respectively.

A second embodiment of the smooth cloth pressing drive mechanism of the sewing machine of the present invention, as shown in fig. 1, includes a main drive mechanism for synchronously driving a presser foot 6 and a rear tug; the main drive mechanism includes a first main drive mechanism 1 that drives the presser foot 6 and a second main drive mechanism 2 that drives the rear tug.

the first shaft hole 14 is formed with a space in which the first drive shaft 13 is freely movable when the sub push-pull drive member 31 pushes and pulls the first elevation drive member 11. The invention is additionally provided with the auxiliary driving mechanism 3 for independently driving the presser foot 6, in the actual use process, the main driving mechanism can synchronously drive the presser foot 6 and the rear tug, and the auxiliary driving mechanism 3 can independently drive the presser foot 6 when needed, so that the cloth is always pressed by the rear tug, and the cloth is not easy to move and dislocate to influence the sewing. Specifically, the main driving mechanism drives the presser foot 6 through the first main driving mechanism 1 and drives the rear tug through the second main driving mechanism 2; the first main driving mechanism 1 performs push-pull driving on the first lifting driving component 11 through the first push-pull driving component 12 by using the first driving shaft 13, when the auxiliary driving mechanism 3 performs single driving on the presser foot 6, the auxiliary driving mechanism 3 performs push-pull driving on the first lifting driving component 11 through the auxiliary push-pull driving component 31 instead of the first push-pull driving component 12, so that the first lifting driving component 11 performs lifting driving on the presser foot 6, and in the process of performing push-pull driving on the first lifting driving component 11 by using the auxiliary push-pull driving component 31, the first driving shaft 13 performs free movement by using the redundant space of the first shaft hole 14 without being influenced by the first shaft hole 14 and the first push-pull driving component 12.

In order to realize the structure of the secondary driving mechanism 3 more specifically, it is preferable that the secondary push-pull driving member 31 is a long strip-shaped structure; the auxiliary driving mechanism 3 further includes an auxiliary driving member 32 for driving the auxiliary push-pull driving member 31 to push and pull, and an auxiliary power unit 33 for driving the auxiliary driving member 32 to swing; the sub driving member 32 is bent and includes a first swing portion 321 for driving the sub push-pull driving member 31 and a second swing portion 322 driven by the sub power unit 33, and when the second swing portion 322 is driven by the sub power unit 33, the first swing portion 321 generates a swing motion for push-pull driving the sub push-pull driving member 31; the sub push-pull driving member 31 has a first power input terminal 311 connected to the first swing part 321, and a first power output terminal 312 connected to the first elevation driving member 11; the first swing part 321 is pivoted with the first power input end 311 through a third driving shaft 323; a first swing fulcrum shaft 324 is disposed between both ends of the sub-driving member 32. In actual use, the sub power unit 33 swings the sub driving member 32, and causes the first swing portion 321 to swing to push and pull the sub push-pull driving member 31 with the first swing fulcrum shaft 324 as a fulcrum, and the sub push-pull driving member 31 further pushes and pulls the first elevation driving member 11. The structure principle is ingenious, the structure is simple, and the action is smooth.

Preferably, the first swing fulcrum rotation shaft 324 is provided with a support 3241 connected to the sewing machine body. Namely, the first swing fulcrum rotating shaft 324 is supported by the support 3241, so that the stability is improved.

Preferably, the first elevation driving member 11 is formed in a bent shape, and includes a third swing portion 111 for driving the presser foot 6 and a fourth swing portion 112 connected to the first driving shaft 13, and when the fourth swing portion 112 is driven by the first driving shaft 13, the third swing portion 111 generates a swing motion for driving the presser foot 6 to be elevated; the third swinging part 111 is pivoted with the presser foot 6 through a fourth driving shaft 113; a second swing fulcrum shaft 114 is disposed between both ends of the first elevation driving member 11. In actual use, the first driving shaft 13 drives the first elevation driving member 11 to swing, and the third swing portion 111 drives the presser foot 6 to move up and down by using the second swing fulcrum shaft 114 as a fulcrum. The structure principle is ingenious, the structure is simple, and the action is smooth.

Preferably, the second swing fulcrum rotating shaft 114 is provided at the bent portion of the first elevation driving part 11. This structure can increase the balanced swing amplitude of the third swing portion 111 and the fourth swing portion 112 and enhance the swing flexibility.

Preferably, the first push-pull driving member 12 is disposed toward the lateral direction, the third swing portion 111 is disposed upward, and the fourth swing portion 112 is disposed toward the lateral direction and opposite to the second swing portion 322; the adapter bar 1131 is arranged from top to bottom towards the presser foot 6. In actual use, the first push-pull driving member 12 pushes and pulls the fourth swing portion 112 to swing in a direction close to the horizontal direction, and the third swing portion 111 drives the presser foot 6 to move up and down by using the changeover lever 1131.

A third embodiment of the cloth pressing drive mechanism of the sewing machine according to the present invention, as shown in fig. 3, includes a main drive mechanism for synchronously driving the presser foot 6 and the rear tug; the main drive mechanism includes a first main drive mechanism 1 that drives the presser foot 6 and a second main drive mechanism 2 that drives the rear tug.

the device also comprises an auxiliary driving mechanism 3 for driving the rear tug independently; the sub drive mechanism 3 includes a sub push-pull drive member 31 for pushing and pulling the second elevation drive member 21;

the second shaft hole 24 is formed with a space in which the second drive shaft 23 is freely movable when the secondary push-pull drive member 31 pushes and pulls the second elevation drive member 21. The invention is additionally provided with the auxiliary driving mechanism 3 for independently driving the rear tug, in the actual use process, the main driving mechanism can synchronously drive the presser foot 6 and the rear tug, and the auxiliary driving mechanism 3 can independently drive the rear tug when needed, so that the cloth is always pressed by the presser foot 6, and the cloth is not easy to move and dislocate to influence the sewing. Specifically, the main driving mechanism drives the presser foot 6 through the first main driving mechanism 1 and drives the rear tug through the second main driving mechanism 2; the second main driving mechanism 2 performs push-pull driving on the second lifting driving component 21 through the second push-pull driving component 22 by using the second driving shaft 23, when the auxiliary driving mechanism 3 drives the rear tug independently, the auxiliary driving mechanism 3 performs push-pull driving on the second lifting driving component 21 through the auxiliary push-pull driving component 31 instead of the second push-pull driving component 22, so that the second lifting driving component 21 performs lifting driving on the rear tug, and in the process of performing push-pull driving on the second lifting driving component 21 by using the auxiliary push-pull driving component 31, the second driving shaft 23 freely moves by using the redundant space of the second shaft hole 24 without being influenced by the second shaft hole 24 and the second push-pull driving component 22.

Preferably, the secondary push-pull driving member 31 is pivotally connected to the second elevation driving member 21 by a second driving shaft 23. That is, the secondary push-pull driving member 31 and the second push-pull driving member 22 share the second driving shaft 23, and the structure is more simple and compact.

Preferably, the second shaft hole 24 is a strip-shaped hole, and the secondary push-pull driving member 31 pushes and pulls the second driving shaft 23 in the length direction of the second shaft hole 24. This structure allows the second shaft hole 24 to be aligned with the path of the second drive shaft 23, and when the secondary push-pull drive member 31 drives the second elevation drive member 21 by the second drive shaft 23, the secondary push-pull drive member is not affected by the second shaft hole 24 and the second push-pull drive member 22, and the operation is flexible and smooth.

In order to realize the structure of the secondary driving mechanism 3 more specifically, it is preferable that the secondary push-pull driving member 31 is a long strip-shaped structure; the auxiliary driving mechanism 3 further includes an auxiliary driving member 32 for driving the auxiliary push-pull driving member 31 to push and pull, and an auxiliary power unit 33 for driving the auxiliary driving member 32 to swing; the sub driving member 32 is bent and includes a first swing portion 321 for driving the sub push-pull driving member 31 and a second swing portion 322 driven by the sub power unit 33, and when the second swing portion 322 is driven by the sub power unit 33, the first swing portion 321 generates a swing motion for push-pull driving the sub push-pull driving member 31; the sub push-pull driving member 31 has a first power input terminal 311 connected to the first swing part 321, and a first power output terminal 312 connected to the second elevation driving member 21; the first swing part 321 is pivoted with the first power input end 311 through a third driving shaft 323; a first swing fulcrum shaft 324 is disposed between both ends of the sub-driving member 32. In actual use, the sub power unit 33 swings the sub driving member 32, and causes the first swing portion 321 to swing to push and pull the sub push-pull driving member 31 with the first swing fulcrum shaft 324 as a fulcrum, and the sub push-pull driving member 31 further pushes and pulls the first elevation driving member 11. The structure principle is ingenious, the structure is simple, and the action is smooth.

Preferably, the second elevation driving member 21 is bent and includes a fifth swing portion 211 for driving the rear tug and a sixth swing portion 212 connected to the second driving shaft 23, and when the sixth swing portion 212 is driven by the second driving shaft 23, the fifth swing portion 211 performs a swing motion for driving the rear tug to ascend and descend; the fifth swing part 211 is pivoted with the rear tug through a fifth driving shaft 211; a third swing fulcrum shaft 214 is disposed between both ends of the second elevation driving member 21. In actual use, the second driving shaft 23 drives the second elevation driving member 21 to swing, so that the fifth swing portion 211 drives the rear tug to ascend and descend by using the third swing fulcrum shaft 214 as a fulcrum. The structure principle is ingenious, the structure is simple, and the action is smooth.

Preferably, the third swing fulcrum shaft 214 is provided at a bent portion of the second elevation driving member 21. This structure can increase the equalized swing amplitudes of the fifth swing portion 211 and the sixth swing portion 212 and enhance the swing flexibility.

Preferably, the second push-pull driving member 22 is disposed in the lateral direction, the fifth swinging portion 211 is disposed upward, and the sixth swinging portion 212 is disposed in the lateral direction and opposite to the second swinging portion 322. In actual use, the second push-pull driving member 22 pushes and pulls the sixth swing portion 212 in a direction close to the horizontal direction to swing, and the fifth swing portion 211 drives the rear tug to ascend and descend.

A cloth pressing device manufactured by the smooth cloth pressing driving mechanism of the sewing machine in the previous embodiments further comprises a presser foot 6 and a rear tug as shown in figures 1-3. The smooth cloth pressing driving mechanism of the sewing machine in the embodiments is connected with the presser foot 6 and the rear tug to form a complete cloth pressing device, and the cloth pressing driving mechanism has the advantages of the embodiments.

Preferably, the presser foot 6 is pivoted with the adapter rod by a lifting slide rod 61. In the actual use process, the lifting slide rod 61 can guide the motion of the presser foot 6 on the basis of bearing the presser foot 6, so that the lifting of the presser foot 6 is more stable and accurate.

In order to make the lifting guide structure of the presser foot 6 more complete, it is preferable that the lifting slide bar 61 is vertically disposed and provided with a guide sliding sleeve 62 connected with the sewing machine main body. The guide sliding sleeve 62 can be matched with the lifting sliding rod 61 to perform relative linear sliding motion, so as to guide the presser foot 6.

A sewing machine manufactured by the cloth pressing device in each of the above embodiments, as shown in FIGS. 1 to 3, further includes a sewing machine main body. The cloth pressing device in the above embodiments is connected with the sewing machine main body to form a complete sewing machine, and has the advantages of the above embodiments.

In order to make the structure of the present invention more complete, it is preferable that the support 3241 is connected with the sewing machine body; the second swing fulcrum rotating shaft 114, the third swing fulcrum rotating shaft 214 and the fourth swing fulcrum rotating shaft 413 are respectively connected with the sewing machine body.

According to the smooth cloth pressing driving mechanism of the sewing machine, the cloth pressing device and the sewing machine, the specific shapes, sizes, arrangement positions, connection modes and the like of all the parts can be adjusted and designed according to actual requirements; the main power device and the auxiliary power device are preferably electromagnet driving mechanisms, oil cylinders or air cylinders and the like, and other suitable power output devices can be selected according to actual requirements; the sewing machine main body is preferably the structure of the existing sewing machine main body, but can be adjusted in a structure which is adaptive to the technical scheme of the invention; the presser foot and the rear tug are preferably of the existing structure, but can be adapted to the technical solution of the invention.

The product form of the present invention is not limited to the embodiments and examples shown in the present application, and any suitable changes or modifications of the similar ideas should be made without departing from the patent scope of the present invention.

Claims

1. A smooth cloth pressing driving mechanism of a sewing machine comprises a main driving mechanism for synchronously driving a presser foot and a rear tug; the main driving mechanism comprises a first main driving mechanism for driving the presser foot and a second main driving mechanism for driving the rear tug;

the method is characterized in that: the auxiliary driving mechanism is used for independently driving the presser foot or the rear tug; the auxiliary driving mechanism comprises an auxiliary push-pull driving component for pushing and pulling the first lifting driving component or the second lifting driving component;

2. The smooth cloth pressing driving mechanism of the sewing machine according to claim 1, characterized in that: the auxiliary push-pull driving part is pivoted with the first lifting driving part through the first driving shaft, or the auxiliary push-pull driving part is pivoted with the second lifting driving part through the second driving shaft.

3. The smooth cloth pressing driving mechanism of the sewing machine according to claim 2, characterized in that: the first shaft hole is a strip-shaped hole, and the auxiliary push-pull driving part pushes and pulls the first driving shaft along the length direction of the first shaft hole; or, the second shaft hole is a strip-shaped hole, and the auxiliary push-pull driving part pushes and pulls the second driving shaft along the length direction of the second shaft hole.

4. A smooth cloth pressing driving mechanism of a sewing machine according to any one of claims 1 to 3, characterized in that: the auxiliary push-pull driving part is of a strip-shaped structure; the auxiliary driving mechanism also comprises an auxiliary driving part for driving the auxiliary push-pull driving part in a push-pull manner, and an auxiliary power device for driving the auxiliary driving part in a swinging manner; the auxiliary driving component is bent and comprises a first swinging part and a second swinging part, wherein the first swinging part drives the auxiliary push-pull driving component, the second swinging part is driven by the auxiliary power device, and when the second swinging part is driven by the auxiliary power device, the first swinging part generates swinging motion for carrying out push-pull driving on the auxiliary push-pull driving component; the auxiliary push-pull driving component is provided with a first power input end connected with the first swinging part and a first power output end connected with the first lifting driving component or the second lifting driving component; the first swinging part is pivoted with the first power input end through a third driving shaft; and a first swing fulcrum rotating shaft is arranged between the two ends of the auxiliary driving part.

5. The smooth cloth pressing driving mechanism of the sewing machine according to claim 4, characterized in that: the first swing fulcrum rotating shaft is arranged at the bending part of the auxiliary driving part.

6. The smooth cloth pressing driving mechanism of the sewing machine according to claim 4, characterized in that: the first swing fulcrum rotating shaft is provided with a support connected with the sewing machine body in a matching mode.

7. The smooth cloth pressing driving mechanism of the sewing machine according to claim 6, characterized in that: the auxiliary power device is provided with an auxiliary power output rod vertically arranged from top to bottom, the auxiliary push-pull driving component is arranged along the transverse direction, the first swinging portion is arranged upwards, the second swinging portion is arranged towards the transverse direction and is opposite to the auxiliary push-pull driving component in direction, and a force bearing portion correspondingly located below the end portion of the auxiliary power output rod is formed at the end portion of the second swinging portion.

8. The smooth cloth pressing driving mechanism of the sewing machine according to claim 7, characterized in that: the auxiliary driving part is of a sheet structure, and the force bearing part is of a transverse sheet structure perpendicular to the plane of the auxiliary driving part.

9. The smooth cloth pressing driving mechanism of the sewing machine according to claim 7, characterized in that: the first lifting driving component is bent and comprises a third swinging part for driving the presser foot and a fourth swinging part connected with the first driving shaft, and when the fourth swinging part is driven by the first driving shaft, the third swinging part generates swinging motion for driving the presser foot to lift; the third swinging part is pivoted with the presser foot through a fourth driving shaft; a second swing fulcrum rotating shaft is arranged between the two ends of the first lifting driving part;

10. The smooth cloth pressing driving mechanism of the sewing machine according to claim 9, characterized in that: the second swing fulcrum rotating shaft is arranged at the bending position of the first lifting driving part, and/or the third swing fulcrum rotating shaft is arranged at the bending position of the second lifting driving part.

11. The smooth cloth pressing driving mechanism of the sewing machine according to claim 9, characterized in that: the fourth driving shaft is provided with a switching rod, one end of the switching rod is pivoted with the fourth driving shaft, and the other end of the switching rod is pivoted with the presser foot.

12. The smooth cloth pressing driving mechanism of the sewing machine according to claim 11, characterized in that: the first push-pull driving component is arranged in the transverse direction, the fourth swinging part is arranged upwards, and the third swinging part is arranged in the transverse direction and opposite to the second swinging part in direction; and/or the second push-pull driving component is arranged towards the transverse direction, the sixth swinging part is arranged upwards, and the fifth swinging part is arranged towards the transverse direction and is opposite to the direction of the second swinging part;

the adapter rod is arranged towards the presser foot from top to bottom.

13. The smooth cloth pressing driving mechanism of the sewing machine according to claim 12, characterized in that: and the fourth power output end is provided with an eighth driving shaft, and the first connecting rod and the second connecting rod are respectively arranged at two sides of the lever and are respectively connected with the eighth driving shaft together.

14. The smooth cloth pressing driving mechanism of the sewing machine according to claim 13, characterized in that: the main power device is provided with a main power output rod vertically arranged from top to bottom, the lever is transversely arranged, the power output ends of the first connecting rod and the second connecting rod are arranged up, and the fourth power input end is correspondingly located below the end part of the main power output rod.

15. The smooth cloth pressing driving mechanism of the sewing machine according to claim 14, wherein: the first and second links are each at an acute angle to the lever.

16. A cloth pressing device manufactured by the cloth pressing driving mechanism of the unobstructed sewing machine as claimed in any one of claims 11 to 15, wherein: the device also comprises a presser foot and a rear tug.

17. A cloth pressing apparatus according to claim 16, wherein: the presser foot is pivoted with the adapter rod through the lifting slide rod.

18. A cloth pressing apparatus according to claim 17, wherein: the lifting slide bar is vertically arranged and is provided with a guide sliding sleeve connected with the sewing machine main body in a matching mode.

19. A sewing machine made by the cloth pressing device of any one of claims 16 to 18, characterized in that: also comprises a sewing machine main body.

20. A sewing machine according to claim 19, wherein: the support is connected with the sewing machine main body; the second swing fulcrum rotating shaft, the third swing fulcrum rotating shaft and the fourth swing fulcrum rotating shaft are respectively connected with the sewing machine main body together.