CN112626722B

CN112626722B - Differential feeding upper pulling machine

Info

Publication number: CN112626722B
Application number: CN201911228823.9A
Authority: CN
Inventors: 陈旭辉
Original assignee: Cheesiang Sewing Machine SH Co ltd; Chee Siang Industrial Co Ltd
Current assignee: Cheesiang Sewing Machine SH Co ltd; Chee Siang Industrial Co Ltd
Priority date: 2019-09-24
Filing date: 2019-12-04
Publication date: 2022-04-12
Anticipated expiration: 2039-12-04
Also published as: TW202113190A; CN112626722A; EP3798343A1; JP2021049315A; EP3798343B1; TWI775018B; KR102144237B1; JP6964648B2

Abstract

The invention relates to a differential feeding upper pulling machine, comprising: a body, a feeding mechanism, a presser foot mechanism, an adjusting mechanism and a control mechanism, wherein the body is provided with a swing arm which can be driven by a main shaft, the feeding mechanism is provided with a feeding wheel which can be driven by the swing arm, wherein, the presser foot mechanism is provided with a pressing wheel which can independently rotate, the adjusting mechanism is provided with an adjusting drive source and an adjusting transmission component, the adjusting drive source can rotate according to a plurality of rotation angles, so that the adjusting transmission component can move relative to the swing arm to adjust the rotation quantity of the feeding wheel, the control mechanism can control the rotation speed of the pressing wheel and the feeding wheel, thereby, the differential feeding upper pulling machine can sew the inner sole of the shoe on the vamp, the adjusting mechanism can change the relative position between the adjusting transmission component and the swing arm, and then the rotating speed of the feeding wheel relative to the press caster wheel is adjusted, so that each stitch formed on the insole and the vamp of the shoe can keep a similar stitch length.

Description

Differential feeding upper pulling machine

Technical Field

The invention relates to a sewing machine for sewing shoe (middle) sole, shoe upper or leather, in particular to a shoe upper puller capable of changing the rotation speed of a feeding wheel according to setting in the sewing process, so that each stitch formed on a sewing object can not be overlooked or overlooked due to differential feeding, and stitches in different areas can keep similar stitch length.

Background

The main shaft of the existing upper pulling machine drives a needle bar and a crochet hook to perform sewing operation, and the main shaft can also simultaneously drive a feeding wheel to perform intermittent rotation, so that the feeding wheel performs feeding action, the presser foot wheel is pivotally connected below a presser foot stand and is positioned on the outer peripheral side of the feeding wheel, the presser foot wheel of the existing upper pulling machine does not have power and cannot rotate independently, wherein the feeding wheel and the presser foot wheel are clamped on the inner sole and the vamp together when the existing upper pulling machine is applied, an operator grips the inner sole and the vamp by two hands simultaneously and strains the bending parts of the inner sole and the vamp, and at the moment, the presser foot wheel follows the feeding wheel to synchronously perform intermittent rotation to complete sewing operation.

Although, present draw group's machine has been widely used, however, draw group's machine with shoes insole and vamp sutural in-process at present, because press the truckle can't independently rotate by oneself, make operating personnel must control the crooked just can sew up the shoes insole in the vamp with both hands along with the profile of shoes insole, it is injured because the shoes insole of holding tightly for a long time to lead to operating personnel's both hands, and, because the presser foot wheel can't rotate by oneself, make the stitch length of taking shape at each stitch of shoes insole and vamp can neglect the length and neglect the weak point because the profile of shoes insole or the crooked vamp aspect of operating personnel.

However, in order to avoid injury of both hands of an operator and the situation that the stitch length of the stitch is not long and not short, at present, another type of upper pulling machine is provided with a stepping motor to drive a presser foot wheel to rotate independently, but when the rotation speed difference between a feeding wheel and the presser foot wheel is too large, the rotation speed of the presser foot wheel is too low or the friction resistance between the shoe insole and the shoe upper is larger, the stitch length of the stitch is shortened, so that the stitch cannot be kept at the shoe insole with uniform stitch length.

Disclosure of Invention

The invention mainly aims to improve the structure of the upper pulling machine, so that the upper pulling machine can adjust the rotation speed of the feeding wheel at any time to correct the stitch length in the process of sewing the shoe insole on the vamp, each stitch formed in any area (straight area or bending area) of a sewing object can keep a similar length, further the phenomenon of uneven stitch length of the shoe insole or the vamp is not needed to be worried about, and the sewing efficiency of the upper pulling machine can be improved.

To achieve the above object, the present invention relates to a differential feeding upper pulling machine, which mainly comprises a main body, a feeding mechanism, a presser foot mechanism, an adjusting mechanism and a control mechanism.

In this embodiment, the body has a main shaft and a swing arm, the main shaft can drive the swing arm to swing, wherein the feeding mechanism has a feeding shaft driven by the swing arm and a feeding wheel located outside the body, the feeding shaft can drive the feeding wheel to rotate, the presser foot mechanism has a presser foot frame installed outside the body, and the presser foot frame is provided with a presser foot wheel located on one side of the feeding wheel and a presser foot driving source capable of driving the presser foot wheel to rotate.

In addition, the adjusting mechanism has an adjusting drive source and an adjusting transmission assembly located between the adjusting drive source and the swing arm, the adjusting drive source can perform a rotation motion according to a plurality of rotation angles, the adjusting transmission assembly is driven by the adjusting drive source and can move relative to the swing arm to change the swing amplitude of the swing arm, so that the swing arm with the swing amplitude can adjust the rotation amount of the feeding wheel, the control mechanism is electrically connected to the presser foot drive source and the adjusting drive source, and the control mechanism is used for controlling the operation states of the presser foot drive source and the adjusting drive source to adjust the rotation rate of the presser foot wheel and the rotation rate of the feeding wheel.

In this embodiment, the adjusting mechanism is provided with an adjusting gear set between the adjusting driving source and the adjusting transmission assembly, and the adjusting gear set can be used to change the magnitude of the torque generated by the adjusting driving source, wherein the adjusting gear set is provided with a driving gear assembled on the adjusting driving source and a driven gear meshed with the driving gear, the radius of the driven gear is larger than that of the driving gear and is assembled on the adjusting transmission component, in addition, the adjusting mechanism is provided with a base, the base is provided with a first connecting plate assembled on the body and a second connecting plate arranged at intervals on the first connecting plate, an accommodating space for accommodating the adjusting gear set is formed between the first connecting plate and the second connecting plate, and the second connecting plate is connected to the adjusting driving source.

In addition, the adjusting transmission component is provided with an adjusting shaft piece close to the adjusting driving source and a groove-shaped bracket close to the swing arm, the groove-shaped bracket is provided with an assembling space and a supporting pin eccentrically arranged on the adjusting shaft piece, and the assembling space is internally provided with a swing piece which is simultaneously assembled on the supporting pin and the swing arm.

Furthermore, the control mechanism has a first sensor that generates an initial stop signal when the driven gear is at an initial position, and the adjustment drive source is stopped by the initial stop signal to ensure that the driven gear is at the initial position, and further has a second sensor that is arranged at intervals on the first sensor, and the second sensor generates a limit stop signal when the driven gear is at a limit position away from the initial position, and the adjustment drive source is stopped by the limit stop signal to ensure that the driven gear does not exceed the limit position.

The invention has the advantages that when the differential feeding upper pulling machine sews the shoe insole and the shoe upper, the adjusting drive source can rotate according to a plurality of rotation angles to change and adjust the relative position between the transmission component and the swing arm, so that the swing amplitude of the swing arm can be increased or decreased, further the rotation speed of the feeding wheel can be higher or lower than the rotation speed of the pressing caster wheel to correct the stitch length, further each stitch formed in any area (straight area or bending area) of the shoe insole and the shoe upper can keep the similar stitch length, therefore, when the differential feeding upper pulling machine sews the shoe insole and the shoe upper, the phenomenon that the stitch length of the shoe insole or the shoe upper is not uniform is not needed to be worried, and the sewing efficiency of sewing the shoe insole or the shoe upper together can be improved.

Drawings

FIG. 1 is a perspective view of the differential feeding upper pulling machine of the present invention;

FIG. 2 is a control schematic diagram of the differential feeding upper pulling machine of the present invention;

FIG. 3 is an exploded view of the differential feeding upper pulling machine of the present invention;

FIG. 4 is a perspective view of the feed drive assembly assembled to the main shaft;

FIG. 5 is an exploded view of the feed drive assembly assembled to the main shaft;

FIG. 6A is a schematic view of a feed drive assembly;

FIG. 6B is a cross-sectional view of the feed drive assembly assembled to the main shaft;

FIG. 6C is a schematic diagram illustrating the adjustment of the main needle pitch adjustment unit;

FIG. 7 is an exploded view of the presser foot mechanism;

FIG. 8 is an exploded view of the adjustment mechanism;

FIG. 9 is a side view of the adjustment mechanism;

FIG. 10A is a schematic view of a first sensor sensing a driven gear;

FIG. 10B is a schematic view of the feed wheel and the presser foot wheel clamped to the sewn article;

FIG. 10C is a schematic view of the second sensor sensing the driven gear;

fig. 10D is a schematic view of the counterclockwise rotation of the driven gear.

Description of reference numerals: 1-differential feeding and upper drawing machine; 10-a body; 11-a housing; 111-needle bar hole; 112-hook hole; 113-presser foot shaft hole; 114-shaft seat; 12-upper cover; 13-the primary power source; 131-a main shaft; 132-a drive belt; 14-a feed drive assembly; 141-a swing arm; 142-a connecting rod; 143-a main pitch adjustment unit; 143 a-a moving member; 143 b-a fixing member; 144-a swing pin; 20-a feeding mechanism; 21-a feed shaft; 22-a feed wheel; 23-a one-way ratchet set; 30-a needle bar mechanism; 31-a needle; 40-a crochet needle transmission mechanism; 41-crochet hook; 50-a stock stop; 60-a presser foot mechanism; 61-a foot pressing frame; 62-a travel bar; 63-pressing a caster; 64-a presser foot drive assembly; 641-a first gear shaft; 642-second gear shaft; 643-bevel gear set; 644 — relay gear; 65-presser foot drive source; 70-an adjustment mechanism; 71-a base; 711-first connecting plate; 712-a second connection plate; 713-an extension plate; 714-an accommodating space; 72-adjusting the drive source; 73-adjusting the transmission assembly; 731-adjusting the support; 731 a-adjustment shaft; 731 b-channel rack; 731c — assembly space; 731 d-support pin; 732-pendulums; 732 a-a first connection; 732 b-a second connecting portion; 74-adjusting gear set; 741-a drive gear; 742 — a driven gear; 80-a control mechanism; 81-a first sensor; 82-a second sensor; 83-main power source controller; 84-pressure foot wheel controller; 85-adjusting the controller; 86-a receiving module; a1 — initial position; a2 — extreme position; s-sewing the object; s1-stitch eyes.

Detailed Description

The invention will be further described with reference to specific embodiments and drawings, the advantages and features of which will become apparent as the description proceeds.

Referring to fig. 1 and 2, the differential feeding upper pulling machine 1 of the present invention is a sewing machine for sewing an insole of a shoe to an edge of a vamp, and is mainly composed of a main body 10, a feeding mechanism 20, a needle bar mechanism 30, a needle hooking transmission mechanism 40, a material blocking mechanism 50, a presser foot mechanism 60, an adjusting mechanism 70 and a control mechanism 80.

Referring to fig. 3 and 4, the main body 10 mainly includes a housing 11, an upper cover 12 and a main power source 13, a needle bar hole 111, a needle hooking hole 112, a presser foot shaft hole 113 and a shaft seat 114 are disposed in front of the housing 11, and the upper cover 12 is assembled on the upper end of the housing 11, wherein the main power source 13 can generate a rotation power and drive a main shaft 131 penetrating into the housing 11 via a transmission belt 132, and the main shaft 131 is assembled with a needle bar transmission assembly (not shown) inside the housing 11 and then assembled with a feeding transmission assembly 14 also inside the housing 11.

Referring to fig. 4 and 5, in this embodiment, the feeding transmission assembly 14 has a swing arm 141 and a connecting rod 142, one end of the swing arm 141 is assembled to the main shaft 131 through a main pitch adjusting unit 143 capable of moving the two assemblies in a staggered manner, so that the swing arm 141 can perform an eccentric rotation motion relative to the axis of the main shaft 131 through the main pitch adjusting unit 143, and the other end of the swing arm 141 is connected to the connecting rod 142 by a spherical bearing, as shown in fig. 6A to 6C, the main needle pitch adjusting unit 143 has a moving member 143a connected to the swing arm 141 and a fixing member 143b fixed to the main shaft 131, the moving part 143a is movably assembled to the fixed part 143b in an assembling manner of a sliding block and a sliding groove, so that the moving part 143a can perform an adjusting movement relative to the fixed part 143b, the moving member 143a must be moved relative to the fixed member 143b in a state where the rotation of the main shaft 131 is stopped.

Referring to fig. 3 and 4, the feeding mechanism 20 is connected to the feeding transmission assembly 14 located inside the main body 10, in this embodiment, the feeding mechanism 20 has a feeding shaft 21, the feeding shaft 21 is disposed on the shaft seat 114 of the main body 10, one end of the feeding shaft 21 is connected to a feeding wheel 22 located outside the main body 10, and the other end is connected to a one-way ratchet set 23, and the one-way ratchet set 23 is connected to the connecting rod 142 of the feeding transmission assembly 14 through a spherical bearing, so that when the main shaft 131 rotates, the main needle distance adjusting unit 143 drives the swing arm 141 to swing with a floating swing pin 144 as a fulcrum, and the swing amount of the lower end of the swing arm 141 can drive the feeding wheel 22 to intermittently rotate with the feeding shaft 21 as an axis through the connecting rod 142 and the one-way ratchet set 23, in this embodiment, the swing pin 144 is simultaneously mounted on the swing arm 141 and the adjusting mechanism 70.

The needle bar mechanism 30 penetrates into the casing 11 of the body 10 through the needle bar hole 111 of the body 10, so that the needle bar mechanism 30 is assembled on the needle bar transmission assembly of the body 10, and the needle bar mechanism 30 has a needle 31 protruding out of the body 10, wherein the hook needle transmission mechanism 40 has a hook needle 41 exposed outside the body 10, and the hook needle 41 penetrates into the casing 11 through the hook needle hole 112 of the body 10, so that the hook needle transmission mechanism 40 is assembled on the needle bar transmission assembly, and the material blocking mechanism 50 is assembled on the casing 11 of the body 10 and is located at the periphery side of the feeding wheel 22.

Referring to fig. 3 and 7, the presser foot mechanism 60 has a presser foot frame 61 located outside the housing 11 of the body 10, the appearance of the presser foot frame 61 is substantially n-shaped, and one end of the presser foot frame 61 has a moving rod 62 and penetrates through the presser foot shaft hole 113 of the body 10 through the moving rod 62 to be assembled to the body 10, and the other opposite end of the presser foot frame 61 is pivotally connected to a presser foot wheel 63 capable of rotating, wherein the presser foot wheel 63 is connected to a presser foot transmission assembly 64 assembled to the presser foot frame 61, and the presser foot transmission assembly 64 is assembled to a presser foot driving source 65 connected to the presser foot frame 61, in this embodiment, the presser foot driving source 65 is a stepping motor and drives the presser foot wheel 63 to rotate through the presser foot transmission assembly 64, wherein the presser foot driving source 65 is fixed to the presser foot frame 61, and the presser foot transmission assembly 64 is provided with a first gear shaft 642 and a second gear shaft 642, as shown, the first gear shaft 641 is connected to the presser foot driving source 65 and pivotally connected to the presser foot frame 61, and the second gear shaft 642 is pivotally connected to the presser foot frame 61 as well as the first gear shaft 641 and connected to the first gear shaft 641 through a bevel gear set 643, wherein an end of the second gear shaft 642 is engaged with the presser foot wheel 63 through a relay gear 644.

Referring to fig. 3 and 8, the adjusting mechanism 70 includes a base 71, an adjusting driving source 72, an adjusting transmission assembly 73 and an adjusting gear set 74, the base 71 includes a first connecting plate 711 fixed to the body 10 and a second connecting plate 712 parallel to the first connecting plate 711, the first connecting plate 711 extends toward the second connecting plate 712 to form an extending plate 713 formed at an end of the second connecting plate 712, and the second connecting plate 712 is spaced apart from the first connecting plate 711 by the extending plate 713, such that an accommodating space 714 is formed among the first connecting plate 711, the second connecting plate 712 and the extending plate 713.

As shown in the figure, the adjusting driving source 72 is a stepping motor and the adjusting driving source 72 can perform a rotation motion according to a plurality of set rotation angles, and is connected to the second connecting plate 712 of the base 71, and the spindle of the adjusting driving source 72 penetrates through the second connecting plate 712 to be located inside the accommodating space 714 of the base 71, wherein the adjusting transmission assembly 73 is connected between the adjusting driving source 72 and the swing arm 141 and has an adjusting support 731 penetrating through the casing 11, and one end of the adjusting support 731 is connected to the adjusting gear set 74 and the other end is connected to a swinging member 732 located inside the main body 10.

In this embodiment, a portion of the adjustment support 731 is an adjustment shaft 731a close to the adjustment driving source 72, and the remaining portion of the adjustment support 731 is a groove-shaped bracket 731b close to the swing arm 141. as shown in fig. 8, the adjustment shaft 731a is simultaneously inserted through the housing 11 of the main body 10 and the first connecting plate 711 of the base 71, and the groove-shaped bracket 731b forms an assembly space 731c and has a supporting pin 731d eccentrically disposed on the axis of the adjustment shaft 731 a.

However, the swinging member 732 is divided into a first connection portion 732a and a second connection portion 732b on the left and right, the first connection portion 732a is assembled to the support pin 731d of the slot-type bracket 731b, and the second connection portion 732b is assembled to the swinging pin 144 of the feeding transmission assembly 14, so that the swinging member 732 is assembled to the support pin 731d and the swinging pin 144 at the same time, as shown in fig. 9, the first connection portion 732a is located in the assembly space 731c of the slot-type bracket 731b, so that the swinging member 732 does not move relative to the slot-type bracket 731 b.

Referring to fig. 8 and 9, the adjusting gear set 74 is used for increasing the torque generated by the adjusting driving source 72 and is located inside the accommodating space 714 of the base 71, wherein the adjusting gear set 74 has a driving gear 741 provided as a spur gear and a driven gear 742 provided as a sector gear, the driving gear 741 is assembled to the spindle of the adjusting driving source 72 and is engaged with the driven gear 742, the driven gear 742 is assembled and fixed to the adjusting shaft 731a of the adjusting transmission assembly 73, and the radius of the driven gear 742 is greater than the radius of the driving gear 741.

Referring to fig. 2, 3 and 8, the control mechanism 80 can be used to control the rotation rate of the feeding wheel 22 and the rotation rate of the presser foot wheel 63, so that the rotation rate of the feeding wheel 22 can be faster or slower than the rotation rate of the presser foot wheel 63, wherein the control mechanism 80 has a first sensor 81, a second sensor 82, a main power source controller 83, a presser wheel controller 84, an adjustment controller 85 and a receiving module 86, the first sensor 81 and the second sensor 82 are arranged on both sides of the driven gear 742 and are both mounted on the first connecting plate 711 of the base 71, in this embodiment, the first sensor 81 and the second sensor 82 belong to proximity switches, and generate signals by sensing the driven gear 742 of the adjustment gear set 74.

As shown in fig. 2, the main power source controller 83 of the control mechanism 80 is electrically connected to the main power source 13, the presser foot wheel controller 84 of the control mechanism 80 is electrically connected to the presser foot drive source 65, and the adjustment controller 85 of the control mechanism 80 is electrically connected to the adjustment drive source 72 of the adjustment mechanism 70, wherein the main power source controller 83, the presser foot wheel controller 84 and the adjustment controller 85 are all electrically connected to the receiving module 86.

Referring to fig. 2 and 10A, in an application, the first sensor 81 of the control mechanism 80 does not sense the driven gear 742 of the adjusting gear set 74, at this time, the adjusting controller 85 of the control mechanism 80 controls the adjusting driving source 72 of the adjusting mechanism 70 to operate such that the driven gear 742 rotates counterclockwise in the direction of the arrow in fig. 10A, when the first sensor 81 detects the lower edge of the driven gear 742, the first sensor 81 generates an initial stop signal and transmits the initial stop signal to the receiving module 86 of the control mechanism 80, and the adjusting controller 85 of the control mechanism 80 controls the adjusting driving source 72 of the adjusting mechanism 70 to stop operating such that the driven gear 742 stays at an initial position a1, wherein when the driven gear 742 is located at the initial position a1, the adjusting mechanism 70 determines the position of the supporting pin 731d, and also synchronously determines the tilt aspect of the oscillating member 732 (as shown in figure 6A).

Referring to fig. 10B, the main power source controller 83 of the control mechanism 80 and the presser foot wheel controller 84 of the control mechanism 80 respectively control the main power source 13 and the presser foot driving source 65 to operate, wherein the main power source 13 drives the main shaft 131 to rotate via the transmission belt 132, the rotating main shaft 131 drives the needle 31 of the needle bar mechanism 30 and the crochet hook 41 of the crochet hook transmission mechanism 40 to perform sewing operation via the needle bar transmission assembly (not shown), the rotating main shaft 131 drives the feeding wheel 22 of the feeding mechanism 20 to intermittently rotate with the feeding shaft 21 as the axis center via the feeding transmission assembly 14, and the presser foot driving source 65 drives the presser foot wheel 63 to rotate with the second gear shaft 642 as the axis center via the presser foot transmission assembly 64, however, the feeding wheel 22 and the presser foot wheel 63 to rotate can drive two sewing objects S (such as an inner sole or a presser foot 63) between the feeding wheel 22 and the presser foot wheel 63 Surface) of the sewing material S is intermittently moved so that the sewing material S is sewn together by the needle 31 and the hook 41, and a plurality of stitches S1 are formed on the surface of the sewing material S.

However, in the process of sewing the two sewing materials S together, if the sewing area is a flat area, the driven gear 742 of the adjusting gear set 74 stays at the initial position a1, so that the rotation speed of the feeding wheel 22 is substantially the same as that of the pressing caster 63, and thus no differential feeding is generated between the two sewing materials S.

Further, if the region where the two sewn products S are sewn together is a turning region, the two sewn products S are bent in a direction biased toward the presser wheel 63, and at this time, the presser wheel controller 84 of the control mechanism 80 controls to reduce the amount of rotation of the presser wheel 63 driven by the presser drive source 65 so that the rotation rate of the presser wheel 63 becomes smaller than the rotation rate of the feed wheel 22, and thereby the differential feed is generated between the two sewn products S, and in a state where the rotation rate of the presser wheel 63 is smaller than the rotation rate of the feed wheel 22, although the same stitch length can be maintained for each stitch S1 formed in the turning region, since the two sewn products S generate a frictional force in the case of performing the sewing operation, the stitch length of the stitch S1 formed in the turning region becomes smaller than the stitch length formed in the straight region.

Referring to fig. 10C, however, in order to overcome the defect that the straight area and the turning area may cause the length of the stitch gauge to be inconsistent, when the presser foot wheel controller 84 controls to reduce the rotation amount of the presser foot drive source 65 driving the presser foot wheel 63, the adjusting controller 85 of the control mechanism 80 controls the adjusting drive source 72 of the adjusting mechanism 70 to rotate, so that the adjusting drive source 72 drives the driven gear 742 of the adjusting gear set 74 to rotate clockwise along the arrow direction in fig. 10C, and further the driven gear 742 is away from the initial position a1, at this time, the support pin 731d of the adjusting transmission assembly 73 is shifted downward, and at the same time, the swinging member 732 of the adjusting transmission assembly 73 rotates counterclockwise to deviate from the horizontal plane, so that the reciprocating movement amount of the main shaft 131 driving the connecting rod 142 via the swinging arm 141 is increased, and further the rotation rate of the presser foot wheel 63 is increased, and the length of the stitch gauge S1 formed in the turning area is corrected to be close to the length of the stitch gauge in the straight area Length.

Referring to fig. 10C, when the adjusting driving source 742 of the adjusting mechanism 70 drives the driven gear 742 of the adjusting gear set 74 to rotate clockwise from the initial position a1 to a limit position a2, the second sensor 82 of the control mechanism 80 detects the upper edge of the driven gear 742 to form a limit stop signal, and the second sensor 82 transmits the limit stop signal to the receiving module 86 of the control mechanism 80, so that the adjusting controller 85 of the control mechanism 80 can control the adjusting driving source 721 of the adjusting mechanism 70 to adjust the driving source 72 to stop operation, and thus the control mechanism 80 can prevent the adjusting driving source 72 from driving the driven gear 742 to rotate beyond a preset range, in this embodiment, when the driven gear 742 is located at the limit position a2, the rotation rate of the feeding wheel 22 can reach a maximum value.

However, the driven gear 742 of the adjusting gear set 74 rotates clockwise by the adjusting driving source 72 to increase the rotation speed range of the presser foot wheel 63 for convenience of description, and as shown in fig. 10D, the driven gear 742 rotates counterclockwise by the adjusting driving source 72 to be away from the limit position a2, at this time, the support pin 731D of the adjusting transmission assembly 73 is shifted upward, and at the same time, the swinging member 732 of the adjusting transmission assembly 73 rotates clockwise to approach the horizontal plane, so that the reciprocating movement of the main shaft 131 driving the link 142 via the swinging arm 141 is reduced, and the rotation rate of the presser foot wheel 63 is reduced.

The foregoing description and examples are exemplary only, and are not intended to limit the scope of the invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a differential pay-off draws group's machine which characterized in that contains:

the feeding transmission assembly is provided with a swing arm and a connecting rod, one end of the swing arm is assembled on the main shaft through a main needle distance adjusting unit which can enable the two assemblies to move in a staggered mode, when the main shaft rotates, the main needle distance adjusting unit drives the swing arm to swing by taking a floating swing pin as a fulcrum, the swing arm can perform eccentric rotation movement relative to the axis of the main shaft through the main needle distance adjusting unit, and the other end of the swing arm is connected to the connecting rod through a spherical bearing;

the feeding mechanism is provided with a feeding shaft driven by the swing arm and a feeding wheel positioned outside the body, two ends of the feeding shaft are respectively connected with the feeding wheel and a one-way ratchet group, the one-way ratchet group is connected with the connecting rod through a spherical bearing, and when the swing arm swings with the swing pin as a fulcrum, the swinging quantity at the lower end of the swing arm can drive the feeding wheel to intermittently rotate with the feeding shaft as an axis through the connecting rod and the one-way ratchet group;

the presser foot mechanism is provided with a presser foot frame arranged outside the body, and the presser foot frame is provided with a presser foot wheel positioned on one side of the feeding wheel and a presser foot driving source capable of driving the presser foot wheel to rotate;

an adjusting mechanism, having an adjusting transmission assembly and an adjusting driving source, wherein the adjusting transmission assembly has an adjusting shaft close to the adjusting driving source and a groove-shaped bracket close to the swing arm, the groove-shaped bracket has an assembling space and a supporting pin eccentrically arranged on the adjusting shaft, a swing member simultaneously assembled on the supporting pin and the swing pin is arranged in the assembling space, the adjusting driving source can drive the supporting pin to shift, meanwhile, the swing member can rotate to change the position of the swing pin, so that the reciprocating movement generated by the main shaft driving the connecting rod through the swing arm can be changed, and the swing arm with the changed swing amplitude can adjust the rotation of the feeding wheel; and

and the control mechanism is electrically connected with the presser foot driving source and the adjusting driving source and is used for controlling the running states of the presser foot driving source and the adjusting driving source so as to adjust the rotation rate of the presser foot caster and the rotation rate of the feeding wheel.

2. The differential feeding upper pulling machine according to claim 1, characterized in that: the adjusting mechanism is provided with an adjusting gear set between the adjusting driving source and the adjusting transmission component, and the adjusting gear set can be used for changing the magnitude of the torque force generated by the adjusting driving source.

3. The differential feeding upper pulling machine according to claim 2, characterized in that: the adjusting gear set is provided with a driving gear assembled on the adjusting driving source and a driven gear meshed with the driving gear, and the radius of the driven gear is larger than that of the driving gear and assembled on the adjusting transmission assembly.

4. The differential feeding upper pulling machine according to claim 3, characterized in that: the control mechanism is provided with a first sensor which can generate an initial stop signal when the driven gear is located at an initial position, and the adjusting driving source can stop rotating through the initial stop signal so as to ensure that the driven gear is located at the initial position.

5. The differential feeding upper pulling machine according to claim 4, wherein: the control mechanism is provided with a second sensor which is arranged at intervals on the first sensor, the second sensor can generate a limit stop signal when the driven gear is located at a limit position far away from the initial position, and the adjusting driving source can stop rotating through the limit stop signal so as to ensure that the driven gear does not exceed the limit position.

6. The differential feeding upper pulling machine according to claim 2, characterized in that: the adjusting mechanism is provided with a base, the base is provided with a first connecting plate assembled on the body and a second connecting plate arranged on the first connecting plate at intervals, an accommodating space for accommodating the adjusting gear set is formed between the first connecting plate and the second connecting plate, and the second connecting plate is connected to the adjusting driving source.