CN108360159B - Cloth-pressing drive mechanism, cloth-pressing device and sewing machine for a smooth and smooth sewing machine - Google Patents

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

Cloth-pressing drive mechanism, cloth-pressing device and sewing machine for a smooth and smooth sewing machine

The patent application of the present invention is a divisional application of the Chinese patent application number 2016102357173. The application number of the original application is 2016102357173, the application date is April 15, 2016, and the name of the invention is a cloth pressing driving mechanism, a cloth pressing device and a sewing machine of a sewing machine. .

technical field

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

Background technique

The structure of the sewing machine is well known. Most of the presser foot and the rear tug of the traditional sewing machine are driven by the same driving mechanism for synchronous lifting and lowering. Although this structure can ensure the lifting and lowering efficiency of the two, it also brings inconvenience in the actual use process. When you only want to lift one of the presser foot and the rear tug, you need to lift both the presser foot and the rear tug at the same time, which will cause the cloth to be in a state that is not pressed, and then the cloth will move and dislocate, which will affect the sewing.

In order to solve the aforementioned problems, Chinese invention patent CN 201510439614.4 discloses a sewing machine based on a fully automatic template split synchronizing wheel device, comprising a sewing machine body, and a tug-lifting mechanism and a foot-lifting mechanism are arranged on the sewing machine body. The rear cover plate of the casing is provided with an electromagnet for lifting and pressing the tug, which drives the crank shaft of the tug to rotate. The rotating fulcrum of the lifting right lever is installed on the casing, and the left end of the tug lifting right lever is connected to the tug lifting and pressing mechanism through the tug lifting rod; The lower end of the mandrel extends out of the casing and is connected to the knee-controlled lifting device on the oil pan. The lifting and lowering of the knee-controlled mandrel drives the tug to lift the right lever, which in turn drives the tug-lifting mechanism. A presser foot lifter electromagnet is arranged in the casing, the output rod of the presser foot lifter electromagnet is pressed against the right end of the presser foot lifter right lever, the rotation fulcrum of the presser foot lifter right lever is installed on the casing, and the presser foot lifts the right lever of the right lever. The left end is connected to the presser foot lifting mechanism through the presser foot lifting rod. The needle plate of the main body of the sewing machine is provided with a lower guide sleeve for the needle to pass through and hook the thread, and the lower guide sleeve can be inserted into the guide groove on the matching template. The needle board is provided with rubber step feeding teeth and plastic high and low pressure feet. The main body of the sewing machine also includes an induction device, which is used to detect when the needle goes up and out of the cloth and sends a control signal to the controller, and the controller controls the stepper motor on the rear side of the casing to start according to the signal; When going down into the cloth, a control signal is sent to the controller, and the controller controls the stepper motor on the rear side of the casing to suspend according to the signal, and the motor shaft of the stepper motor drives the tug to run through the universal coupling; the stepper motor, The mopping mechanism, universal coupling and tug lifting and pressing mechanism constitute the mopping machine. The surface of the tug wheel is provided with a silicone wheel. This invention has the effect that the cloth mopping wheel (rear tug wheel) is lifted independently, and the presser foot is kept in the state of pressing the cloth. However, in the actual use process, the presser foot is often required to be independently lifted and lowered, and the cloth mopping wheel is required to press the cloth, so this invention The practicality still needs to be improved.

In view of this, the inventor of this case has conducted in-depth research on the above-mentioned problems, and this case came into being.

SUMMARY OF THE INVENTION

One of the objectives of the present invention is to provide a smooth and smooth sewing machine driving mechanism with more smooth and smooth sewing operation, high efficiency, novel and reasonable structure, flexible operation and strong practicability. The tugs are driven synchronously, and the presser foot or the rear tug can be driven independently by the auxiliary drive mechanism when needed, so that the cloth is always pressed by the presser foot or the rear tug, and the cloth is not easy to move and dislocate and affect sewing.

The second purpose of the present invention is to provide a cloth pressing device with smoother sewing operation, high efficiency, novel and reasonable structure, flexible operation and strong practicability.

The third purpose of the present invention is to provide a sewing machine with more smooth and smooth sewing operation, high efficiency, novel and reasonable structure, flexible operation and strong practicability.

In order to achieve the above object, the present invention adopts such technical scheme:

A smooth and smooth cloth pressing driving mechanism of a sewing machine, comprising 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 pressing foot and a rear tug for driving the second main drive mechanism;

The first main drive mechanism includes a first lift drive component that drives the presser foot up and down, and a first push-pull drive component that pushes and pulls the first lift drive component; the first push-pull drive component passes through the first drive shaft. pivotally connected with the first lift driving component, the first push-pull driving component is formed with a first shaft hole matched with the first driving shaft;

And/or, the second main driving mechanism includes a second elevating drive component for elevating and driving the rear tug, and a second push-pull driving component for pushing and pulling the second elevating drive component; the second The second drive shaft is pivotally connected with the second lift drive member, and the second push-pull drive member is formed with a second shaft hole matched with the second drive shaft;

It also includes an auxiliary driving mechanism for independently driving the presser foot or the rear tug; the auxiliary driving mechanism includes an auxiliary push-pull driving component for pushing and pulling the first lifting driving member or the second lifting driving member;

The first shaft hole is formed with a space for the first drive shaft to move freely when the auxiliary push-pull driving member pushes and pulls the first lift driving member; a space for the free movement of the second drive shaft when the auxiliary push-pull drive component pushes and pulls the second lift drive component;

The main drive mechanism further includes a main drive part for pushing and pulling the first push-pull drive part and the second push-pull drive part, and a main power device for driving the main drive part;

The first push-pull drive member and the second push-pull drive member are elongated structures, and the first push-pull drive member has a second power input end connected with the main drive member and a power input end connected with the first drive shaft. a second power output end, the second push-pull drive component has a third power input end connected with the main drive component and a third power output end connected with the second drive shaft;

The main driving component includes a lever, a first link for pushing and pulling the first push-pull driving component, and a second link for pushing and pulling the second push-pull driving component; the lever has a a fourth power input end driven by the main power device, and a fourth power output end driven by the first connecting rod and the second connecting rod; a fourth swing fulcrum shaft is arranged between two ends of the lever;

The first connecting rod has a fifth power input end connected with the fourth power output end, and a fifth power output end pivotally connected with the second power input end through a sixth drive shaft; the The second connecting rod has a sixth power input end connected with the fourth power output end, and a sixth power output end pivotally connected with the third power input end through a seventh drive shaft.

The auxiliary push-pull driving member is pivotally connected to the first lift driving member through the first drive shaft, or the auxiliary push-pull driving member is pivotally connected to the second lift driving member through the second drive shaft together.

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

The auxiliary push-pull driving component is a long strip structure; the auxiliary driving mechanism further includes an auxiliary driving component for pushing and pulling the auxiliary pushing-pull driving component, and an auxiliary power device for swinging and driving the auxiliary driving component; the auxiliary driving mechanism The driving part is bent and includes a first swinging part that drives the auxiliary push-pull driving part and a second swinging part that is driven by the auxiliary power device. When the second swinging part is driven by the auxiliary power device Then, the first swinging part generates a swinging action of pushing and pulling the auxiliary push-pull driving member; the auxiliary push-pull driving member has a first power input end connected with the first swinging part, and a first power input end connected with the first swinging part. A first power output end connected to a lift drive part or a second lift drive part; the first swing part is pivotally connected to the first power input end through a third drive shaft; both ends of the auxiliary drive part A first swing fulcrum shaft is arranged therebetween.

The first swinging fulcrum shaft is arranged at the bend of the auxiliary driving component.

The first swing fulcrum shaft is provided with a support which is connected with the main body of the sewing machine.

The auxiliary power device has an auxiliary power output rod vertically arranged from top to bottom, the auxiliary push-pull driving member is arranged in a horizontal direction, the first swinging part is arranged upward, and the second swinging part is arranged in a horizontal direction and is connected with the horizontal direction. The directions of the auxiliary push-pull driving components are opposite, and the end portion of the second swing portion is formed with a corresponding force bearing portion below the end portion of the auxiliary power output rod.

The auxiliary driving component is a sheet body structure, and the bearing portion is a transverse sheet body structure perpendicular to the plane where the auxiliary driving component is located.

The first lifting and lowering driving member is in a bent shape, and includes a third swinging portion for driving the presser foot and a fourth swinging portion connected with the first drive shaft. When the fourth swinging portion is subjected to the first After the drive shaft is driven, the third swinging part produces a swinging action of lifting and lowering the presser foot; the third swinging part is pivotally connected to the presser foot through the fourth drive shaft; A second swinging fulcrum shaft is arranged between the ends;

And/or, the second lift driving member is in a bent shape, and includes a fifth swing portion for driving the rear tug and a sixth swing portion connected with the second drive shaft. After the second driving shaft is driven, the fifth swinging part produces a swinging action of lifting and lowering the rear tug; the fifth swinging part is pivotally connected to the rear tug through the fifth driving shaft; the second lifting and lowering A third swing fulcrum rotating shaft is arranged between two ends of the driving member.

The second swinging fulcrum shaft is arranged at the bend of the first lift drive member, and/or the third swing fulcrum shaft is arranged at the bend of the second lift drive member.

The fourth drive shaft is provided with an adapter rod, one end of which is pivotally connected with the fourth drive shaft, and the other end is pivotally connected with the presser foot.

The first push-pull driving member is arranged laterally, the fourth swinging portion is arranged upward, and the third swinging portion is arranged laterally and is opposite to the second swinging portion; and/or the second swinging portion The push-pull driving member is arranged laterally, the sixth swinging portion is arranged upwards, and the fifth swinging portion is arranged laterally and is opposite to the second swinging portion;

The transfer rod is arranged from top to bottom toward the presser foot.

The fourth power output end is provided with an eighth drive shaft, and the first connecting rod and the second connecting rod are respectively arranged on two sides of the lever and are respectively connected with the eighth drive shaft.

The main power device has a main power output rod vertically arranged from top to bottom, the lever is arranged horizontally, the power output ends of the first link and the second link are both set upward, and the fourth link The power input end is correspondingly below the end of the main power output rod.

Both the first link and the second link form an acute angle with the lever.

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

The presser foot is pivotally connected with the transfer rod through a lifting sliding rod.

The lifting slide bar is arranged vertically, and is equipped with a guide sliding sleeve connected with the main body of the sewing machine.

A sewing machine further includes a sewing machine main body.

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

After adopting the above technical solution, the smooth and smooth cloth pressing driving mechanism of the sewing machine of the present invention breaks through the structural form of the traditional sewing machine pressing driving mechanism, and is additionally provided with an auxiliary driving mechanism for independently driving the presser foot or the rear tug. In the middle, the main drive mechanism can synchronously drive the presser foot and the rear tug, and the auxiliary drive mechanism can drive the presser foot or the rear tug separately when needed, so that the cloth is always pressed by the presser foot or the rear tug, and the cloth is not easy to move. Misalignment affects sewing. The specific operation is as follows: the main drive mechanism drives the presser foot through the first main drive mechanism, and drives the rear tug through the second main drive mechanism; the first main drive mechanism uses the first push-pull drive member to drive the first The elevating drive member performs push-pull drive. When the auxiliary drive mechanism independently drives the presser foot, regardless of the structure of the second main drive mechanism, the auxiliary drive mechanism replaces the first push-pull drive member with the auxiliary push-pull drive member. Push-pull drive is carried out, and then the first lift drive member is used to lift the presser foot. During the push-pull drive process of the auxiliary push-pull drive member to the first lift drive member, the first drive shaft utilizes the excess space of the first shaft hole to move freely. and will not be affected by the first shaft hole and the first push-pull drive member; or, the second main drive mechanism uses the second drive shaft to push and pull the second lift drive member through the second push-pull drive member. When the rear tug is driven independently, no matter what the structure of the first main drive mechanism is, the auxiliary drive mechanism uses the auxiliary push-pull drive member to replace the second push-pull drive member to push-pull the second lift drive member, thereby enabling the second lift drive member to push and pull the second lift drive member. The rear tug is driven up and down, and in the process of the auxiliary push-pull drive part pushing and pulling the second elevating drive part, the second drive shaft uses the excess space of the second shaft hole to move freely without being affected by the second shaft hole and the second push-pull. Of course, the first main drive mechanism can also use the first drive shaft to push and pull the first lift drive member through the first push-pull drive member, and the second main drive mechanism can use the second push-pull drive member to use the second drive. The shaft pushes and pulls the second lift drive member, but the auxiliary drive mechanism independently drives the presser foot or the rear tug. The main power device drives the main drive member, and the main drive member pushes and pulls the first push-pull drive member and the second push-pull drive member. The main power device drives the fourth power input end of the lever, the lever swings on the fourth swing fulcrum shaft as a fulcrum, the fourth power output end of the lever drives the first link and the second link, the first link The first push-pull driving part is driven by the sixth drive shaft through the fifth power output end, and the second push-pull drive part is driven by the second link through the sixth power output end and the seventh drive shaft. The structure principle is ingenious, the structure is simple, and the action is smooth. Compared with the prior art, the smooth and smooth cloth pressing driving mechanism of the sewing machine of the present invention can synchronously drive the presser foot and the rear tug through the main driving mechanism, and can also use the auxiliary driving mechanism to synchronously drive the presser foot or the rear tug when necessary. The tug is driven independently, so that the cloth is always pressed by the presser foot or the rear tug, and the cloth is not easy to move and dislocate and affect the sewing. The sewing operation is smoother and more efficient, the structure is novel and reasonable, the operation is flexible, and the practicability is strong.

The present invention also provides a cloth pressing device made of the aforementioned cloth pressing driving mechanism, which also has the aforementioned beneficial effects.

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

Description of drawings

Fig. 1 is the first partial structure schematic diagram of the present invention;

Fig. 2 is the second partial structure schematic diagram of the present invention;

FIG. 3 is a schematic diagram of a third partial structure of the present invention.

In the picture:

1-First main drive mechanism 11-First lift drive member 111-Third swinging part 112-Fourth swinging part 113-Fourth drive shaft 1131-Adapting rod 114-Second swinging fulcrum shaft 12-First push-pull drive Part 121 - second power input end 122 - second power output end 13 - first drive shaft 14 - first shaft hole

2-Second main drive mechanism 21-Second lift drive member 211-Fifth swing portion 212-Sixth swing portion 213-Fifth drive shaft 214-Third swing fulcrum shaft 22-Second push-pull drive member 221-Third Power input end 222 - third power output end 23 - second drive shaft 24 - second shaft hole

3-Auxiliary drive mechanism 31-Auxiliary push-pull drive member 311-First power input end 312-First power output end 32-Auxiliary drive member 321-First swinging part 322-Second swinging part 3221- Bearing part 323-The first Three drive shafts 324 - first swing fulcrum shaft 3241 - support 33 - auxiliary power device 331 - auxiliary power output rod

4-Main drive part 41-lever 411-fourth power input end 412-fourth power output end 413-fourth swing fulcrum shaft 414-eighth drive shaft 42-first connecting rod 421-fifth power input end 422- sixth drive shaft 423 - fifth power output end 43 - second connecting rod 431 - sixth power input end 432 - seventh drive shaft 433 - sixth power output end

5-Main power unit 51-Main power output rod

6-Presser foot 61-Lifting sliding rod 62-Guiding sliding sleeve.

Detailed ways

In order to further explain the technical solutions of the present invention, the following specific embodiments are described in detail.

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

The first main drive mechanism 1 includes a first lift drive part 11 that drives the presser foot 6 up and down, and a first push-pull drive part 12 that pushes and pulls the first lift drive part 11; the first push-pull drive part 12 passes through the first The drive shaft 13 is pivotally connected with the first lift drive member 11, and the first push-pull drive member 12 is formed with a first shaft hole 14 matched with the first drive shaft 13;

The second main drive mechanism 2 includes a second elevating drive member 21 for elevating and driving the rear tug, and a second push-pull driving member 22 for pushing and pulling the second elevating drive member 21; the second push-pull driving member 22 is driven by the second The shaft 23 is pivotally connected with the second lift drive member 21, and the second push-pull drive member 22 is formed with a second shaft hole 24 matched with the second drive shaft 23;

It also includes an auxiliary drive mechanism 3 that drives the presser foot 6 independently; the auxiliary drive mechanism 3 includes an auxiliary push-pull drive component 31 that pushes and pulls the first lift drive component 11 ;

The first shaft hole 14 is formed with a space for the first drive shaft 13 to freely move when the auxiliary push-pull drive member 31 pushes and pulls the first lift drive member 11 . In the present invention, an auxiliary driving mechanism 3 for driving the presser foot 6 separately is provided. In actual use, the main driving mechanism can synchronously drive the presser foot 6 and the rear tug, and the auxiliary driving mechanism 3 can drive the presser foot when necessary. 6. It is driven independently, so that the cloth is always pressed by the rear tug, and the cloth is not easy to move and dislocate and affect the sewing. The specific operation is that 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 uses the first push-pull driving member 12 to use the first The drive shaft 13 pushes and pulls the first lift drive member 11 , the second main drive mechanism 2 pushes and pulls the second lift drive member 21 through the second push-pull drive member 22 and uses the second drive shaft 23 to push and pull the second lift drive member 21 . When the presser foot 6 is driven independently, the auxiliary drive mechanism 3 uses the auxiliary push-pull drive member 31 to replace the first push-pull drive member 12 to push-pull the first lift drive member 11 , thereby enabling the first lift drive member 11 to lift and lower the presser foot 6 . When the auxiliary push-pull drive member 31 pushes and pulls the first lift drive member 11, the first drive shaft 13 uses the excess space of the first shaft hole 14 to move freely without being affected by the first shaft hole 14 and the first shaft hole 14. The effect of pushing and pulling the drive member 12 .

Preferably, the auxiliary push-pull driving member 31 is pivotally connected with the first lifting driving member 11 through the first driving shaft 13 . That is, the auxiliary push-pull driving member 31 and the first push-pull driving member 12 share the first drive shaft 13, and the structure is simpler and more compact.

Preferably, the first shaft hole 14 is a bar-shaped hole, and the auxiliary push-pull driving member 31 pushes and pulls the first drive shaft 13 along the length direction of the first shaft hole 14 . This structure enables the first shaft hole 14 to match the path of the first drive shaft 13 , so that when the auxiliary push-pull drive member 31 uses the first drive shaft 13 to drive the first lift drive member 11 , the first shaft hole will not be affected. 14 and the influence of the first push-pull drive member 12, the action is flexible and smooth.

In order to realize the structure of the auxiliary drive mechanism 3 more specifically, preferably, the auxiliary push-pull drive member 31 is a long strip-shaped structure (the strip-shaped structure can specifically be a strip-shaped sheet body or a strip-shaped cylindrical rod, polygonal rod, etc. The auxiliary drive mechanism 3 also includes an auxiliary drive part 32 that pushes and pulls the auxiliary push-pull drive part 31, and an auxiliary power device 33 that swings and drives the auxiliary drive part 32; The first swinging part 321 driven by the auxiliary push-pull driving member 31 and the second swinging part 322 driven by the auxiliary power device 33 . The driving member 31 performs the swinging action of push-pull driving; the auxiliary push-pull driving member 31 has a first power input end 311 connected with the first swing portion 321, and a first power output end 312 connected with the first lift driving member 11; The swing part 321 is pivotally connected with the first power input end 311 through the third drive shaft 323 ; a first swing fulcrum shaft 324 is disposed between two ends of the auxiliary drive part 32 . In actual use, the auxiliary power device 33 swings and drives the auxiliary driving member 32, so that the first swinging portion 321 relies on the first swing fulcrum shaft 324 as a fulcrum to generate a swinging action of pushing and pulling the auxiliary push-pull driving member 31, and then the auxiliary The push-pull drive member 31 pushes and pulls the first lift drive member 11 . The structure principle is ingenious, the structure is simple, and the action is smooth.

Preferably, the first swing fulcrum shaft 324 is provided at the bend of the auxiliary driving member 32 . This structure can increase the balanced swing amplitudes of the first swing portion 321 and the second swing portion 322 and enhance swing flexibility.

Preferably, the first swing fulcrum shaft 324 is provided with a support 3241 connected to the main body of the sewing machine (not shown in the figure). That is, the first swing fulcrum shaft 324 is carried by the support 3241, which is more firm and stable.

Preferably, the auxiliary power device 33 has an auxiliary power output rod 331 vertically arranged from top to bottom, the auxiliary push-pull driving member 31 is arranged in the lateral direction, the first swinging part 321 is arranged upward, and the second swinging part 322 is arranged in the lateral direction and is connected with The direction of the auxiliary push-pull driving member 31 is opposite, and the end portion of the second swing portion 322 is formed with a corresponding force bearing portion 3221 below the end portion of the auxiliary power output rod 331 . In actual use, the auxiliary power device 33 uses the auxiliary power output rod 331 to drive the bearing part 3221 downward, so that the second swing part 322 drives the first swing part 321 to swing, and drives the auxiliary push-pull driving part 31 to be close to the horizontal Push and pull in the direction.

In order to realize the specific structure of the auxiliary driving part 3, preferably, the auxiliary driving part 3 is a sheet body structure, and the bearing part 3221 is a transverse sheet body structure perpendicular to the plane where the auxiliary driving part 33 is located. The structure is simple, the manufacture is convenient, and the cost is low.

Preferably, the first lift driving member 11 is bent and includes a third swing portion 111 for driving the presser foot 6 and a fourth swing portion 112 connected with the first drive shaft 13. When the fourth swing portion 112 receives the first swing portion 112 After the first driving shaft 13 is driven, the third swinging portion 111 generates a swinging action to drive the presser foot 6 up and down; the third swinging portion 111 is pivotally connected to the presser foot 6 through the fourth driving shaft 113 ; the first lifting and lowering driving member 11 A second swinging fulcrum shaft 114 is arranged between the two ends of the

The second lift driving member 21 is in a bent shape, and includes a fifth swing portion 211 for driving the rear tug and a sixth swing portion 212 connected with the second drive shaft 23 . When the sixth swing portion 212 receives the second drive shaft 23 After being driven, the fifth swinging part 211 generates a swinging action of lifting and driving the rear tug; the fifth swinging part 211 is pivotally connected to the rear tug through the fifth driving shaft 211; A third swing fulcrum shaft 214 is provided. In actual use, the first drive shaft 13 swings and drives the first lift drive member 11 , so that the third swing portion 111 relies on the second swing pivot shaft 114 as a fulcrum to drive the presser foot 6 up and down. The second drive shaft 23 swings and drives the second lift drive member 21 , so that the fifth swing portion 211 relies on the third swing fulcrum shaft 214 as a fulcrum to drive the rear tug to lift and lower. The structure principle is ingenious, the structure is simple, and the action is smooth.

Preferably, the second swing fulcrum shaft 114 is provided at the bend of the first lift driving member 11 , and the third swing fulcrum shaft 214 is provided at the bend of the second lift drive member 21 . This structure can increase the balanced swing amplitudes of the third swing portion 111 and the fourth swing portion 112, and the fifth swing portion 211 and the sixth swing portion 212, and enhance swing flexibility.

Preferably, the fourth drive shaft 113 is provided with an adapter rod 1131 pivotally connected to the fourth drive shaft 113 at one end and pivoted to the presser foot 6 at the other end. In the actual use process, the adaptor rod 1131 is used as the adaptor, and the fourth drive shaft 113 can flexibly drive the presser foot 6, and the adaptor rod 1131 can be rotated at will to adapt to the relationship between the corresponding parts during the movement. The transformation of parameters such as angle and distance between them has a simple and reasonable structure.

Preferably, the first push-pull driving member 12 is arranged laterally, the fourth swinging portion 112 is arranged upward, the third swinging portion 111 is arranged laterally and is opposite to the direction of the second swinging portion 322 ; the second push-pull driving member 22 is arranged laterally , the sixth swinging portion 212 is disposed upward, the fifth swinging portion 211 is disposed laterally and is opposite to the direction of the second swinging portion 322 ; the adapter rod 1131 is disposed toward the presser foot 6 from top to bottom. During actual use, the first push-pull driving member 12 pushes and pulls the fourth swinging portion 112 to swing in a nearly horizontal direction, and then the third swinging portion 111 uses the adapter rod 1131 to lift and lower the presser foot 6; the second push-pull driving member 22 The sixth swinging portion 212 is pushed and pulled in a near-horizontal direction to swing, and then the fifth swinging portion 211 drives the rear tug to lift and lower.

In order to realize the complete structure of the main drive mechanism, preferably, the main drive mechanism further includes a main drive part 4 for pushing and pulling the first push-pull drive part 12 and the second push-pull drive part 22 , and a main drive part 4 for driving the main drive part 4 . Powerplant 5. During actual use, the main power device 5 drives the main driving member 4 , and the main driving member 4 pushes and pulls the first push-pull driving member 12 and the second push-pull driving member 22 .

Preferably, the first push-pull drive member 11 and the second push-pull drive member 22 are elongated structures, and the first push-pull drive member 11 has a second power input end 121 connected to the main drive member 4 and connected to the first drive shaft 13 The second power output end 122, the second push-pull drive part 22 has a third power input end 221 connected with the main drive part 4 and a third power output end 222 connected with the second drive shaft 23;

The main drive part 4 includes a lever 41, a first link 42 for pushing and pulling the first push-pull drive part 12 and a second link 43 for pushing and pulling the second push-pull drive part 22; the lever 41 has a main power device 5. The fourth power input end 411 for driving, and the fourth power output end 412 for driving the first connecting rod 42 and the second connecting rod 43; a fourth swinging fulcrum shaft 413 is arranged between two ends of the lever 41;

The first connecting rod 42 has a fifth power input end 421 connected with the fourth power output end 412, and a fifth power output end 423 pivotally connected with the second power input end 121 through the sixth drive shaft 422; the second The connecting rod 43 has a sixth power input end 431 connected with the fourth power output end 412 , and a sixth power output end 433 pivotally connected with the third power input end 221 through the 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 relying on the fourth swing fulcrum shaft 413 as a fulcrum, and the fourth power output end 412 of the lever 41 is connected to the first connection. The rod 42 and the second connecting rod 43 are driven. The first connecting rod 42 drives the first push-pull driving member 12 through the fifth power output end 423 and the sixth drive shaft 422, and the second connecting rod 43 passes through the sixth power output end. 433 uses the seventh drive shaft 432 to drive the second push-pull drive member 22 . 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 drive shaft 414 , and the first connecting rod 42 and the second connecting rod 43 are respectively disposed on two sides of the lever 41 and connected with the eighth drive shaft 414 respectively. In actual use, the eighth drive shaft 414 can drive the first connecting rod 42 and the second connecting rod 43 at the same time, and then drive the first push-pull driving member 12 and the second push-pull driving member 22 at the same time. Synchronized drive of presser foot 6 and 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 laterally, the power output ends of the first link 42 and the second link 43 are both arranged upward, and the fourth The power input end 411 is correspondingly located below the end of the main power output rod 51 . In the actual use process, the main power device 5 drives the lever 41 downward through the main power output rod 51, and the lever 41 swings by the fourth swing fulcrum shaft 413 as a fulcrum, and then the first link 42 and the second link 43 to drive.

Preferably, both the first link 42 and the second link 43 form an acute angle with the lever 41 . In this way, when the fourth power output end 412 of the lever 41 is pryed upward, the power output ends of the first link 42 and the second link 43 can be supported upward and pull the first push-pull drive member 12 and the second Pushing and pulling the driving member 22 produces a pulling action on the first lifting driving member 11 and the second lifting driving member 21, and then the third swing portion 111 and the fifth swing portion 211 respectively pull up the presser foot 6 and the rear tug.

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

The first main drive mechanism 1 includes a first lift drive part 11 that drives the presser foot 6 up and down, and a first push-pull drive part 12 that pushes and pulls the first lift drive part 11; the first push-pull drive part 12 passes through the first The drive shaft 13 is pivotally connected with the first lift drive member 11, and the first push-pull drive member 12 is formed with a first shaft hole 14 matched with the first drive shaft 13;

It also includes an auxiliary drive mechanism 3 that drives the presser foot 6 independently; the auxiliary drive mechanism 3 includes an auxiliary push-pull drive component 31 that pushes and pulls the first lift drive component 11 ;

The first shaft hole 14 is formed with a space for the first drive shaft 13 to freely move when the auxiliary push-pull drive member 31 pushes and pulls the first lift drive member 11 . In the present invention, an auxiliary driving mechanism 3 for driving the presser foot 6 separately is provided. In actual use, the main driving mechanism can synchronously drive the presser foot 6 and the rear tug, and the auxiliary driving mechanism 3 can drive the presser foot when necessary. 6. It is driven independently, so that the cloth is always pressed by the rear tug, and the cloth is not easy to move and dislocate and affect the sewing. The specific operation is that 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 uses the first push-pull driving member 12 to use the first The drive shaft 13 pushes and pulls the first lift drive member 11 . When the auxiliary drive mechanism 3 drives the presser foot 6 alone, the auxiliary drive mechanism 3 replaces the first push-pull drive member 12 to drive the first lift through the auxiliary push-pull drive member 31 The component 11 is driven to push and pull, and then the first lift drive component 11 is driven to lift the presser foot 6. During the push-pull drive of the first lift drive component 11 by the auxiliary push-pull drive component 31, the first drive shaft 13 uses the first shaft. The redundant space of the hole 14 can move freely without being affected by the first shaft hole 14 and the first push-pull driving member 12 .

Preferably, the auxiliary push-pull driving member 31 is pivotally connected with the first lifting driving member 11 through the first driving shaft 13 . That is, the auxiliary push-pull driving member 31 and the first push-pull driving member 12 share the first drive shaft 13, and the structure is simpler and more compact.

Preferably, the first shaft hole 14 is a bar-shaped hole, and the auxiliary push-pull driving member 31 pushes and pulls the first drive shaft 13 along the length direction of the first shaft hole 14 . This structure enables the first shaft hole 14 to match the path of the first drive shaft 13 , so that when the auxiliary push-pull drive member 31 uses the first drive shaft 13 to drive the first lift drive member 11 , the first shaft hole will not be affected. 14 and the influence of the first push-pull drive member 12, the action is flexible and smooth.

In order to realize the structure of the auxiliary driving mechanism 3 more concretely, preferably, the auxiliary push-pull driving member 31 is a long strip structure; the auxiliary driving mechanism 3 further includes an auxiliary driving member 32 for pushing and pulling the auxiliary pushing-pull driving member 31, and an auxiliary driving member 32 for driving the auxiliary pushing-pull driving member 31. Auxiliary power device 33 for oscillating driving of the driving member 32; the auxiliary driving member 32 is bent and includes a first swinging portion 321 that drives the auxiliary pushing-pulling driving member 31 and a second swinging portion 322 that is driven by the auxiliary power device 33, When the second swinging portion 322 is driven by the auxiliary power device 33 , the first swinging portion 321 generates a swinging motion to push and pull the auxiliary push-pull driving member 31 ; the auxiliary push-pull driving member 31 has a first power connected to the first swinging portion 321 The input end 311 is connected to the first power output end 312 connected to the first lift drive part 11; the first swing part 321 is pivotally connected to the first power input end 311 through the third drive shaft 323; A first swing fulcrum shaft 324 is disposed between the ends. In actual use, the auxiliary power device 33 swings and drives the auxiliary driving member 32, so that the first swinging portion 321 relies on the first swing fulcrum shaft 324 as a fulcrum to generate a swinging action of pushing and pulling the auxiliary push-pull driving member 31, and then the auxiliary The push-pull drive member 31 pushes and pulls the first lift drive member 11 . The structure principle is ingenious, the structure is simple, and the action is smooth.

Preferably, the first swing fulcrum shaft 324 is provided at the bend of the auxiliary driving member 32 . This structure can increase the balanced swing amplitudes of the first swing portion 321 and the second swing portion 322 and enhance swing flexibility.

Preferably, the first swing fulcrum shaft 324 is provided with a support 3241 connected to the main body of the sewing machine. That is, the first swing fulcrum shaft 324 is carried by the support 3241, which is more firm and stable.

Preferably, the auxiliary power device 33 has an auxiliary power output rod 331 vertically arranged from top to bottom, the auxiliary push-pull driving member 31 is arranged in the lateral direction, the first swinging part 321 is arranged upward, and the second swinging part 322 is arranged in the lateral direction and is connected with The direction of the auxiliary push-pull driving member 31 is opposite, and the end portion of the second swing portion 322 is formed with a corresponding force bearing portion 3221 below the end portion of the auxiliary power output rod 331 . In actual use, the auxiliary power device 33 uses the auxiliary power output rod 331 to drive the bearing part 3221 downward, so that the second swing part 322 drives the first swing part 321 to swing, and drives the auxiliary push-pull driving part 31 to be close to the horizontal Push and pull in the direction.

In order to realize the specific structure of the auxiliary driving part 3, preferably, the auxiliary driving part 3 is a sheet body structure, and the bearing part 3221 is a transverse sheet body structure perpendicular to the plane where the auxiliary driving part 33 is located. The structure is simple, the manufacture is convenient, and the cost is low.

Preferably, the first lift driving member 11 is bent and includes a third swing portion 111 for driving the presser foot 6 and a fourth swing portion 112 connected with the first drive shaft 13. When the fourth swing portion 112 receives the first swing portion 112 After the first driving shaft 13 is driven, the third swinging portion 111 generates a swinging action to drive the presser foot 6 up and down; the third swinging portion 111 is pivotally connected to the presser foot 6 through the fourth driving shaft 113 ; the first lifting and lowering driving member 11 A second swinging fulcrum shaft 114 is arranged between the two ends of the . In actual use, the first drive shaft 13 swings and drives the first lift drive member 11 , so that the third swing portion 111 relies on the second swing pivot shaft 114 as a fulcrum to drive the presser foot 6 up and down. The structure principle is ingenious, the structure is simple, and the action is smooth.

Preferably, the second swing fulcrum shaft 114 is provided at the bend of the first lift driving member 11 . This structure can increase the balanced swing amplitudes of the third swing portion 111 and the fourth swing portion 112 and enhance swing flexibility.

Preferably, the fourth drive shaft 113 is provided with an adapter rod 1131 pivotally connected to the fourth drive shaft 113 at one end and pivoted to the presser foot 6 at the other end. In the actual use process, the adaptor rod 1131 is used as the adaptor, and the fourth drive shaft 113 can flexibly drive the presser foot 6, and the adaptor rod 1131 can be rotated at will to adapt to the relationship between the corresponding parts during the movement. The transformation of parameters such as angle and distance between them has a simple and reasonable structure.

Preferably, the first push-pull driving member 12 is disposed laterally, the third swinging portion 111 is disposed upward, the fourth swinging portion 112 is disposed laterally and is opposite to the direction of the second swinging portion 322 ; the adaptor rod 1131 faces from top to bottom Presser foot 6 set. In actual use, the first push-pull driving member 12 pushes and pulls the fourth swing portion 112 in a nearly horizontal direction to swing, and then the third swing portion 111 uses the adapter rod 1131 to lift and lower the presser foot 6 .

The third embodiment of the cloth pressing driving mechanism of a smooth sewing machine of the present invention, as shown in FIG. 3 , includes a main driving mechanism for synchronously driving the presser foot 6 and the rear tug; the main driving mechanism includes a counter-pressing mechanism. The first main drive mechanism 1 that drives the legs 6 and the second main drive mechanism 2 that drives the rear tug.

The second main drive mechanism 2 includes a second elevating drive member 21 for elevating and driving the rear tug, and a second push-pull driving member 22 for pushing and pulling the second elevating drive member 21; the second push-pull driving member 22 is driven by the second The shaft 23 is pivotally connected with the second lift drive member 21, and the second push-pull drive member 22 is formed with a second shaft hole 24 matched with the second drive shaft 23;

It also includes an auxiliary drive mechanism 3 that drives the rear tugs independently; the auxiliary drive mechanism 3 includes an auxiliary push-pull drive component 31 that pushes and pulls the second lift drive component 21 ;

The second shaft hole 24 is formed with a space for the second drive shaft 23 to freely move when the auxiliary push-pull drive member 31 pushes and pulls the second lift drive member 21 . The present invention is additionally provided with an auxiliary driving mechanism 3 for driving the rear tug wheel independently. In actual use, the main driving mechanism can synchronously drive the presser foot 6 and the rear tug wheel, and the auxiliary driving mechanism 3 can drive the rear tug wheel when necessary. It is driven alone, so that the cloth is always pressed by the presser foot 6, and the cloth is not easy to move and dislocate and affect the sewing. The specific operation is that the main drive mechanism drives the presser foot 6 through the first main drive mechanism 1 , and drives the rear tug through the second main drive mechanism 2 ; the second main drive mechanism 2 uses the second push-pull drive member 22 to utilize the second The drive shaft 23 pushes and pulls the second elevating drive member 21 . When the auxiliary drive mechanism 3 drives the rear tug alone, the auxiliary drive mechanism 3 replaces the second push-pull drive member 22 with the second elevating drive member through the auxiliary push-pull drive member 31 . 21 push-pull drive, and then make the second lift drive member 21 lift and drive the rear tug. During the push-pull drive process of the auxiliary push-pull drive member 31 to the second lift drive member 21, the second drive shaft 23 uses the second shaft hole 24 The extra space of the device can move freely without being affected by the second shaft hole 24 and the second push-pull driving part 22 .

Preferably, the auxiliary push-pull driving member 31 is pivotally connected to the second lifting driving member 21 through the second driving shaft 23 . That is, the auxiliary push-pull driving member 31 and the second push-pull driving member 22 share the second driving shaft 23, and the structure is simpler and more compact.

Preferably, the second shaft hole 24 is a bar-shaped hole, and the auxiliary push-pull driving member 31 pushes and pulls the second drive shaft 23 along the length direction of the second shaft hole 24 . This structure enables the second shaft hole 24 to match the path of the second drive shaft 23 , so that when the auxiliary push-pull drive member 31 uses the second drive shaft 23 to drive the second lift drive member 21 , the second shaft hole will not be affected. 24 and the second push-pull drive member 22, the action is flexible and smooth.

In order to realize the structure of the auxiliary driving mechanism 3 more concretely, preferably, the auxiliary push-pull driving member 31 is a long strip structure; the auxiliary driving mechanism 3 further includes an auxiliary driving member 32 for pushing and pulling the auxiliary pushing-pull driving member 31, and an auxiliary driving member 32 for driving the auxiliary pushing-pull driving member 31. Auxiliary power device 33 for oscillating driving of the driving member 32; the auxiliary driving member 32 is bent and includes a first swinging portion 321 that drives the auxiliary pushing-pulling driving member 31 and a second swinging portion 322 that is driven by the auxiliary power device 33, When the second swinging portion 322 is driven by the auxiliary power device 33 , the first swinging portion 321 generates a swinging motion to push and pull the auxiliary push-pull driving member 31 ; the auxiliary push-pull driving member 31 has a first power connected to the first swinging portion 321 The input end 311 is connected to the first power output end 312 connected to the second lift drive member 21; the first swing portion 321 is pivotally connected to the first power input end 311 through the third drive shaft 323; A first swing fulcrum shaft 324 is disposed between the ends. In actual use, the auxiliary power device 33 swings and drives the auxiliary driving member 32, so that the first swinging portion 321 relies on the first swing fulcrum shaft 324 as a fulcrum to generate a swinging action of pushing and pulling the auxiliary push-pull driving member 31, and then the auxiliary The push-pull drive member 31 pushes and pulls the first lift drive member 11 . The structure principle is ingenious, the structure is simple, and the action is smooth.

Preferably, the first swing fulcrum shaft 324 is provided at the bend of the auxiliary driving member 32 . This structure can increase the balanced swing amplitudes of the first swing portion 321 and the second swing portion 322 and enhance swing flexibility.

Preferably, the first swing fulcrum shaft 324 is provided with a support 3241 connected to the main body of the sewing machine. That is, the first swing fulcrum shaft 324 is carried by the support 3241, which is more firm and stable.

Preferably, the auxiliary power device 33 has an auxiliary power output rod 331 vertically arranged from top to bottom, the auxiliary push-pull driving member 31 is arranged in the lateral direction, the first swinging part 321 is arranged upward, and the second swinging part 322 is arranged in the lateral direction and is connected with The direction of the auxiliary push-pull driving member 31 is opposite, and the end portion of the second swing portion 322 is formed with a corresponding force bearing portion 3221 below the end portion of the auxiliary power output rod 331 . In actual use, the auxiliary power device 33 uses the auxiliary power output rod 331 to drive the bearing part 3221 downward, so that the second swing part 322 drives the first swing part 321 to swing, and drives the auxiliary push-pull driving part 31 to be close to the horizontal Push and pull in the direction.

In order to realize the specific structure of the auxiliary driving part 3, preferably, the auxiliary driving part 3 is a sheet body structure, and the bearing part 3221 is a transverse sheet body structure perpendicular to the plane where the auxiliary driving part 33 is located. The structure is simple, the manufacture is convenient, and the cost is low.

Preferably, the second lift driving member 21 is in a bent shape, and includes a fifth swing portion 211 for driving the rear tug and a sixth swing portion 212 connected with the second drive shaft 23. When the sixth swing portion 212 is subjected to the second swing portion 212 After the drive shaft 23 is driven, the fifth swinging part 211 produces a swinging action of lifting and lowering the rear tug; the fifth swinging part 211 is pivotally connected to the rear tug through the fifth driving shaft 211; A third swing fulcrum shaft 214 is disposed therebetween. In actual use, the second drive shaft 23 swings and drives the second lift drive member 21 , so that the fifth swing portion 211 relies on the third swing pivot shaft 214 as a fulcrum to lift the rear tug. The structure principle is ingenious, the structure is simple, and the action is smooth.

Preferably, the third swing fulcrum shaft 214 is provided at the bend of the second lift driving member 21 . This structure can increase the balanced swing amplitude of the fifth swing portion 211 and the sixth swing portion 212 and enhance swing flexibility.

Preferably, the second push-pull driving member 22 is disposed laterally, the fifth swinging portion 211 is disposed upward, and the sixth swinging portion 212 is disposed laterally and opposite to the second swinging portion 322 . During actual use, the second push-pull driving member 22 pushes and pulls the sixth swing portion 212 to swing in a nearly horizontal direction, and then the fifth swing portion 211 drives the rear tug to lift and lower.

A cloth pressing device made of the smooth and smooth cloth pressing driving mechanism of the sewing machine in the foregoing embodiments, as shown in Figures 1-3, further includes a presser foot 6 and a rear tug. The cloth pressing driving mechanism of the smooth sewing machine in the foregoing embodiments is connected with the presser foot 6 and the rear tug to form a complete cloth pressing device, which has the beneficial effects of the foregoing embodiments.

Preferably, the presser foot 6 is pivotally connected with the transfer rod through the lifting sliding rod 61 . In actual use, the lifting slide bar 61 can guide the movement of the presser foot 6 on the basis of carrying the presser foot 6 , so that the lifting and lowering of the presser foot 6 is more stable and precise.

In order to make the lifting guide structure of the presser foot 6 more complete, preferably, the lifting sliding bar 61 is vertically arranged, and is equipped with a guiding sliding sleeve 62 connected with the main body of the sewing machine. The guide sliding sleeve 62 can cooperate with the lifting sliding rod 61 to perform relative linear sliding movement, thereby guiding the presser foot 6 .

A sewing machine made of the cloth pressing device in the foregoing embodiments, as shown in Figures 1-3, further includes a sewing machine body. The cloth pressing device in the foregoing embodiments is connected with the main body of the sewing machine to form a complete sewing machine, which has the beneficial effects of the foregoing embodiments.

In order to make the structure of the present invention more complete, preferably, the support 3241 is connected with the main body of the sewing machine; connected.

The cloth pressing drive mechanism, cloth pressing device and sewing machine of the smooth and smooth sewing machine of the present invention, the specific shape, size, setting position and connection method of each component can be adjusted and designed according to actual requirements; the main power device and the auxiliary power device. It is preferably an electromagnet drive mechanism, an oil cylinder or an air cylinder, etc., and other suitable power output devices can also be selected according to actual requirements; the main body of the sewing machine is preferably the existing main structure of the sewing machine, but it can be adapted to match the technical solution of the present invention. Structural adjustment; the presser foot and the rear tug are preferably the existing presser foot and rear tug, but they can be adjusted to suit the technical solutions of the present invention.

The product form of the present invention is not limited to the illustrations and examples in this case, and any appropriate changes or modifications of similar ideas by anyone should be deemed not to depart from the scope of the present invention.

Claims (20)

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 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 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;

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.

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;

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.

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.

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