CN210341284U - Cloth feeding mechanism of sewing machine - Google Patents
Cloth feeding mechanism of sewing machine Download PDFInfo
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- CN210341284U CN210341284U CN201920567504.XU CN201920567504U CN210341284U CN 210341284 U CN210341284 U CN 210341284U CN 201920567504 U CN201920567504 U CN 201920567504U CN 210341284 U CN210341284 U CN 210341284U
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Abstract
The utility model discloses a sewing machine's work feed mechanism, including feed dog subassembly, drive assembly, lifting teeth subassembly and feed dog subassembly, the feed dog subassembly include feed dog frame drive assembly installs the drive spindle on sewing machine including rotating, lifting teeth subassembly is including fixing the epaxial lifting teeth eccentric wheel of drive is in with cup jointing the lifting teeth slider on the lifting teeth eccentric wheel, lifting teeth slider slidable mounting is in the lifting teeth spout of seting up on the feed dog frame, the lifting teeth spout is followed the length direction setting of feed dog frame. The cloth feeding and the tooth lifting action of the utility model are driven by the driving main shaft, the tooth lifting action realizes the structure by the matching of the tooth lifting component and the synchronous guiding component, the tooth lifting effect is good, the efficiency is high, and the ball bearing is arranged, the abrasion and the load between parts are smaller, and the service life is long; the cloth feeding device is provided with the small eccentric adjusting wheel, the small adjusting shaft and the cloth feeding control assembly, and is convenient and quick in cloth feeding length adjustment, large in adjusting range and high in precision.
Description
Technical Field
The utility model belongs to the technical field of weaving equipment, in particular to sewing machine's work feed mechanism.
Background
The existing sewing machine has the working principle that a needle rod drives a lead to penetrate through a curved needle which is arranged at the bottom of a textile fabric and used for creating a good winding under the driving of a driving device, so that the lead and the winding are interwoven together to realize sewing. In view of the special working principle of the existing sewing machine, the sewing machine has the advantages of high sewing speed, good sewing quality, convenient operation and the like, is popular with people, and is widely applied to the fields of clothing, home furnishing and the like. The sewing machine generally includes a needle bar needling and thread skipping mechanism, a differential adjusting mechanism, a cloth feeding mechanism, a looper thread hooking mechanism, and the like. Wherein, the feed dog in the feed mechanism conveys the sewing material to the required position through the lifting motion and the cooperation of the differential adjusting mechanism.
The invention patent application with the application number of 201810488285.6 discloses a sewing machine and a cloth feeding mechanism thereof, which comprises a feeding tooth frame, a crankshaft assembly, a cloth feeding connecting rod and a cloth feeding swing rod, wherein the cloth feeding connecting rod is fixedly arranged on the side surface of the cloth feeding tooth frame and is used for being connected with a differential adjusting mechanism, and two ends of the cloth feeding swing rod respectively penetrate through the cloth feeding connecting rod and the crankshaft assembly. The cloth feeding tooth frame and the cloth feeding swing rod are connected through the shaft, so that a crank slider mechanism is formed between the cloth feeding swing rod and the crankshaft assembly, up-and-down swing of the cloth feeding tooth frame is achieved, an original sliding groove slider mechanism is replaced, the problems of clamping stagnation and the like caused by movement of a slider relative to a sliding groove are solved, and the cloth feeding tooth frame is more stable and reliable in action. However, the structure has large abrasion and large load on the joint position, so that the noise of parts is large and the contact is unstable when the parts swing, the service life is shortened, the technical requirement on the parts is high, the cost is high, the structure cannot set the length of the sewing material for feeding cloth every time, and the applicability is poor.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a cloth feeding mechanism of sewing machine, simple structure is stable, stand wear and tear, load-resisting, long service life to can adjust the seam material length of cloth feeding at every turn.
The technical scheme of the utility model as follows: a cloth feeding mechanism of a sewing machine comprises a tooth frame component, a driving component, a lifting tooth component and a cloth feeding component, wherein the tooth frame component comprises a cloth feeding tooth frame, a cloth feeding tooth and a differential tooth which are arranged on the cloth feeding tooth frame, a synchronous guiding component is further arranged at the tail end of the cloth feeding tooth frame, the driving component comprises a driving main shaft which is rotatably arranged on the sewing machine, the cloth feeding component comprises a cloth feeding shaft which is rotatably arranged on the sewing machine, the cloth feeding component further comprises a swinging structure which is connected with the cloth feeding shaft and the cloth feeding tooth frame, the swinging structure comprises an adjusting connecting rod which is rotatably connected with the cloth feeding tooth frame and an adjusting crank which is fixedly connected with the cloth feeding shaft, an adjusting sliding groove which is arranged along the length direction of the adjusting sliding groove is formed in the adjusting sliding groove, the adjusting small shaft is rotatably connected with the adjusting connecting rod, a fixing structure which is used for fixing the adjusting small shaft and the adjusting crank is further arranged at one end, away from the sewing machine, of the adjusting small shaft, the feed dog assembly comprises a feed dog rack, a feed dog rack and a feed dog assembly, wherein the feed dog rack is arranged on the feed dog rack, the feed dog assembly comprises a feed dog eccentric wheel fixed on the driving main shaft and a feed dog sliding block sleeved on the feed dog eccentric wheel, the feed dog sliding block is slidably mounted in a feed dog sliding groove formed in the feed dog rack, and the feed dog sliding groove is formed along the length direction of the feed dog rack.
Preferably, the driving assembly further comprises a driving connecting rod which is sleeved on the driving main shaft and can eccentrically rotate relative to the driving main shaft, a cloth feeding connecting rod crank which is fixedly sleeved on the cloth feeding shaft and is rotatably connected with the driving connecting rod, and an eccentric wheel set which is sleeved on the driving main shaft, wherein the eccentric motion between the driving connecting rod and the driving main shaft is realized through the eccentric wheel set.
The utility model discloses an operation process does: the driving main shaft rotates, the driving connecting rod eccentrically swings relative to the driving main shaft through the eccentric wheel set, the cloth feeding shaft is driven to rotate through the cloth feeding connecting rod crank and the driving connecting rod, the cloth feeding shaft drives the cloth feeding tooth rack to move through the swinging structure, meanwhile, the driving main shaft and the tooth lifting eccentric wheel enable the tooth lifting sliding block to swing up and down while moving in the tooth lifting sliding groove, and the tooth lifting cloth feeding of the cloth feeding tooth rack is achieved by matching with the cloth feeding assembly.
Preferably, the tooth lifting eccentric wheel is an eccentric wheel convex block arranged on the driving main shaft, the central axis of the tooth lifting eccentric wheel is not in the same line with the central axis of the driving main shaft, and a ball bearing is further sleeved between the tooth lifting eccentric wheel and the tooth lifting sliding block, so that the tooth lifting sliding block can rotate more smoothly relative to the driving main shaft, the friction and the wear are reduced, the noise is reduced, and the service life is prolonged.
Preferably, the upper surface and the lower surface of the tooth lifting slide block are attached to the groove wall of the tooth lifting slide groove of the feed dog frame, so that looseness in the sliding process is prevented, and the stability is improved.
Preferably, the feed dog sliding block is slidably connected to two surfaces of the feed dog frame, and grooves for accommodating the feed dog frame are formed in an extending manner, so that the feed dog frame cannot deviate towards two sides when sliding relative to the feed dog sliding block, and the stability of the feed dog frame is improved.
Preferably, an eccentric adjusting small wheel is further arranged between the adjusting connecting rod and the adjusting crank, the small adjusting shaft is located at the axis of the small eccentric adjusting wheel, the small eccentric adjusting wheel is eccentrically provided with a small eccentric shaft which is rotatably connected in a shaft sleeve at the end part of the adjusting connecting rod, the surface of the small adjusting shaft is also provided with a guide surface matched with the groove wall of the adjusting chute, the guide surface is jointed with the groove wall of the adjusting chute and can slide smoothly relative to the groove wall, and can prevent the small eccentric wheel from rotating relative to the adjusting crank to influence the transmission effect of the adjusting crank on the adjusting connecting rod, the eccentric small shaft is positioned above the adjusting small shaft, so that the force arm of the adjusting crank to the adjusting connecting rod can be increased, the transmission of the adjusting crank to the adjusting connecting rod is more labor-saving and smooth, and the load of parts is reduced.
Preferably, the synchronous guiding assembly comprises a synchronous rotating shaft rotatably mounted on the sewing machine, a synchronous rotating shaft fixedly connected with the synchronous main shaft, and a synchronous sliding block rotatably sleeved on the synchronous rotating shaft, the synchronous sliding block is slidably mounted in a synchronous sliding groove formed in the tail end of the cloth feeding tooth frame, the synchronous sliding groove is formed along the length direction of the cloth feeding tooth frame, the synchronous rotating shaft and the synchronous main shaft are eccentrically arranged, and the synchronous guiding assembly enables the tail end of the cloth feeding tooth frame to swing up and down while moving back and forth relative to the synchronous sliding block and to be matched with the swing of the tooth lifting assembly to synchronously swing up or down.
Preferably, the adjusting chute is an arc chute, the bending direction of the adjusting chute is the same as that of the adjusting crank, the circle center of the adjusting chute and the adjusting connecting rod are located on the same side of the adjusting crank, the structure can enable the adjustment of the adjusting small shaft to be smoother and labor-saving, the load-bearing capacity of the adjusting crank and the adjusting chute can be improved, the service life of the adjusting crank and the adjusting chute is prolonged, and the corresponding guide surface is an arc guide surface matched with the groove wall of the arc chute.
Preferably, the eccentric wheel set comprises a positioning wheel fixedly sleeved on the driving main shaft, a positioning gear, a positioning eccentric wheel rotatably sleeved on the driving main shaft, an adjusting eccentric wheel and a sliding positioning toothed sheet, the adjusting eccentric wheel is fixedly installed on one side of the driving connecting rod, a cam extends into a connecting rod shaft hole at the shaft center of the driving connecting rod, a gap is reserved between the cam and the connecting rod shaft hole, the positioning eccentric wheel is sleeved in the gap, an eccentric small column is axially arranged at the position of the positioning wheel far away from the central shaft of the positioning wheel, the eccentric small column is rotatably installed on the positioning eccentric wheel, a toothed sheet sliding groove is formed in the end surface of the adjusting eccentric wheel far away from the side of the driving connecting rod, the sliding positioning toothed sheet is slidably installed in the toothed sheet sliding groove, the sliding positioning toothed sheet is sleeved outside the driving main shaft, and a limiting tooth meshed with the positioning gear is arranged at one end part of the sliding positioning toothed sheet, eccentric wheelset still installs the location torsional spring, location torsional spring one end fixed mounting be in on the regulation eccentric wheel, the other end is arranged in and is seted up in the slot of the terminal surface of the last spacing tooth one end of slide locating tooth, the location torsional spring enables the slide locating tooth slides to positioning gear, makes spacing tooth with positioning gear keeps the engaged state, and this kind of structure is compared in traditional regulation structure simpler, and the friction is littleer, and life is longer, moves more stably smoothly, and the noise of production is also littleer.
Preferably, the positioning eccentric wheel is provided with an eccentric roller hole, an eccentric roller is rotatably arranged in the positioning eccentric wheel, an eccentric small roller hole which is the same as the eccentric roller in the axial direction is formed in the position, away from the central axis, of the eccentric roller, and the eccentric small roller is rotatably arranged in the eccentric small roller hole.
Preferably, a driving ball bearing is further arranged between the positioning eccentric wheel and the cam of the adjusting eccentric wheel, so that the eccentric rotation between the positioning eccentric wheel and the adjusting eccentric wheel is more stable and smooth.
Preferably, a limit screw is arranged in the circumferential direction of the positioning gear, two protruding portions are arranged on two sides of a tooth piece sliding groove in the adjusting eccentric wheel, the limit screw is located between the two protruding portions, and the limit screw is matched with the protruding portions to form a rotation adjusting angle of the adjusting eccentric wheel.
Preferably, a cloth feeding control assembly is further arranged and is matched with the positioning gear, the sliding positioning toothed sheet, the adjusting eccentric wheel and the boss for use.
Preferably, the cloth feeding control assembly comprises a through button sleeve arranged on a sewing machine shell and a button arranged in the button sleeve, the button can slide in the button sleeve, the sliding direction of the button is overlapped with the sliding direction of the sliding positioning toothed sheet, the end part of the button is close to the end part of one end, far away from the limiting teeth, of the sliding positioning toothed sheet, and when the button is pressed, the button pushes the sliding positioning toothed sheet to enable the limiting teeth and the positioning gear to be disengaged, so that the structure is simple and labor-saving in operation and not prone to faults or damage.
Preferably, the fixing structure is a fixing nut, and the surface of the corresponding small adjusting shaft is provided with a thread matched with the fixing nut.
The beneficial effects of the utility model are that:
1. the cloth feeding and the lifting teeth of the cloth feeding tooth frame are driven by the driving main shaft, the structure is simple and stable, and the failure rate is low;
2. the feed lifting tooth action is realized through a feed lifting tooth sliding block and a feed lifting tooth eccentric wheel, and a ball bearing is arranged, so that the abrasion and the load among parts are small, and the service life is long;
3. the feed dog assembly and the synchronous guide assembly realize the feed dog action of the feed dog frame together, the feed dog effect is good, and the efficiency is high;
4. the cloth feeding mechanism is provided with the small eccentric wheel and the small adjusting shaft, and is also provided with the cloth feeding control assembly, so that the cloth feeding length at each time can be conveniently and quickly adjusted, the adjusting range is large, and the precision is high.
Drawings
Fig. 1 is a three-dimensional structure diagram of embodiment 1 of the present invention;
fig. 2 is a schematic structural view of a tooth lifting eccentric wheel in embodiment 1 of the present invention;
fig. 3 is a schematic structural view of a tooth lifting slider according to embodiment 1 of the present invention;
fig. 4 is a schematic structural view of an adjusting crank according to embodiment 1 of the present invention;
fig. 5 is an installation schematic diagram of the synchronous guiding component according to embodiment 1 of the present invention;
fig. 6 is an installation schematic view of the eccentric small wheel of embodiment 2 of the present invention;
fig. 7 is an exploded view of the structure of the eccentric small wheel of embodiment 2 of the present invention;
fig. 8 is a partial installation view of an eccentric wheel set according to embodiment 3 of the present invention;
fig. 9 is an exploded view of the eccentric wheel assembly according to embodiment 3 of the present invention;
fig. 10 is an installation schematic view of a positioning gear according to embodiment 3 of the present invention;
fig. 11 is an exploded view of the cloth feeding control assembly according to embodiment 3 of the present invention;
the items in the figure are respectively: 101 feed dog carrier, 102 feed dog, 103 differential dog, 201 drive spindle, 202 drive link, 203 feed link crank, 204 positioning wheel, 205 positioning gear, 206 positioning eccentric, 207 adjusting eccentric, 208 sliding positioning tooth, 209 link shaft hole, 210 cam, 211 eccentric post, 212 tooth slide, 213 limit dog, 214 positioning torsion spring, 215 eccentric roller shaft hole, 216 eccentric roller, 217 eccentric post hole, 218 driving roller bearing, 219 limit screw, 220 boss, 301 tooth lift eccentric, 302 tooth lift slide, 303 tooth lift slide, 304 groove, 401 feed spindle, 402 adjusting link, 403 adjusting crank, 404 adjusting slide, 405 adjusting small shaft, 406 fixing structure, 407 adjusting eccentric small wheel, 408 eccentric small shaft, guide surface, 501 synchronous spindle, 502 synchronous spindle, 503 synchronous slide, 504 synchronous slide, 409 button, 602 button.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the following embodiments and accompanying drawings. It should be noted that the above-mentioned upper and lower positional relationships are for the state of the present embodiment when actually installed and used, and intuitively speaking, for fig. 1.
Example 1
As shown in fig. 1, a cloth feeding mechanism of a sewing machine comprises a tooth frame assembly, a driving assembly, a lifting tooth assembly and a cloth feeding assembly, wherein the tooth frame assembly comprises a cloth feeding tooth frame 101, a cloth feeding tooth 102 and a differential tooth 103 which are arranged on the cloth feeding tooth frame 101, a synchronous guiding assembly is further arranged at the tail end of the cloth feeding tooth frame 101, the driving assembly comprises a driving main shaft 201 which is rotatably arranged on the sewing machine, the cloth feeding assembly comprises a cloth feeding shaft 401 which is rotatably arranged on the sewing machine, the cloth feeding assembly further comprises a swinging structure which connects the cloth feeding shaft 401 and the cloth feeding tooth frame 101, the swinging structure comprises an adjusting connecting rod 402 which is rotatably connected with the cloth feeding tooth frame 101 and an adjusting crank 403 which is fixedly connected with the cloth feeding shaft 401, an adjusting chute 404 which is arranged along the length direction of the adjusting crank 403 is arranged in the adjusting chute 404, an adjusting small shaft 405 is arranged in the adjusting chute 404, and the adjusting small shaft 405 is rotatably connected with the adjusting connecting rod 402, the adjusting small shaft 405 is further provided with a fixing structure 406 for fixing the adjusting small shaft 405 and the adjusting crank 403 at one end away from the sewing machine, the feed lifting assembly comprises a feed lifting eccentric wheel 301 fixed on the driving main shaft 201 and a feed lifting slide block 302 sleeved on the feed lifting eccentric wheel 301, the feed lifting slide block 302 is slidably mounted in a feed lifting slide groove 303 formed in the feed lifting dog frame 101, and the feed lifting slide groove 303 is arranged along the length direction of the feed lifting dog frame 101.
The driving assembly further comprises a driving connecting rod 202 which is sleeved on the driving main shaft 201 and can eccentrically rotate relative to the driving main shaft 201, a cloth feeding connecting rod crank 203 which is fixedly sleeved on the cloth feeding shaft 401 and rotatably connected with the driving connecting rod 202, and an eccentric wheel set sleeved on the driving main shaft 201, wherein the eccentric motion between the driving connecting rod 202 and the driving main shaft 201 is realized through the eccentric wheel set.
The operation process of the embodiment is as follows: the driving main shaft 201 rotates, the driving connecting rod 202 eccentrically swings relative to the driving main shaft 201 through the eccentric wheel set, the cloth feeding shaft 401 is driven to rotate through the cloth feeding connecting rod crank 203 and the driving connecting rod 202, the cloth feeding shaft 401 drives the cloth feeding tooth rack 101 to move through a swinging structure, meanwhile, the driving main shaft 201 and the tooth lifting eccentric wheel 301 enable the tooth lifting sliding block 302 to vertically swing while moving in the tooth lifting sliding groove 303, and tooth lifting cloth feeding of the cloth feeding tooth rack 101 is achieved through matching of a cloth feeding assembly.
As shown in fig. 2, the tooth lifting eccentric wheel 301 is an eccentric wheel convex block arranged on the driving main shaft 201, a central axis of the tooth lifting eccentric wheel 301 is not collinear with a central axis of the driving main shaft 201, and a ball bearing (not shown) is further sleeved between the tooth lifting eccentric wheel 301 and the tooth lifting sliding block 302, so that the tooth lifting sliding block 302 rotates more smoothly relative to the driving main shaft 201, friction and wear are reduced, noise is reduced, and service life is prolonged.
In this embodiment, the upper and lower surfaces of the tooth lifting slider 302 are attached to the groove wall of the tooth lifting chute 303 of the feed dog frame 101, so as to prevent looseness during sliding and increase stability.
As shown in fig. 3, the feed dog slider 302 is slidably connected to two surfaces of the feed dog carrier 101, and a groove 304 for accommodating the feed dog carrier 101 is formed by extending the feed dog slider 302, so that the feed dog carrier 101 does not shift to both sides when sliding relative to the feed dog slider 302, and the stability of the feed dog carrier 101 is improved.
As shown in fig. 4, the adjusting chute 404 is a circular arc chute, the bending direction of the arc chute is the same as that of the adjusting crank 403, and the center of the arc chute and the adjusting connecting rod 402 are located on the same side of the adjusting crank 403, so that the adjustment of the adjusting small shaft 405 can be more smooth and labor-saving, and the load-bearing capacity of the adjusting crank 403 and the adjusting chute 404 can be increased, and the service life can be prolonged.
As shown in fig. 5, the synchronous guiding assembly comprises a synchronous spindle 501 rotatably mounted on the sewing machine, a synchronous spindle 502 fixedly connected with the synchronous spindle 501, and a synchronous sliding block 503 rotatably sleeved on the synchronous spindle 502, the synchronous sliding block 503 is slidably mounted in a synchronous sliding groove 504 formed at the tail end of the feed dog frame 101, the synchronous chute 504 is disposed along the longitudinal direction of the feed dog carrier 101, the synchronous rotating shaft 502 and the synchronous main shaft 501 are eccentrically disposed, the synchronous guiding component enables the tail end of the feed dog frame 101 to move back and forth relative to the synchronous sliding block 503, swing up and down, and synchronously swing up or down in cooperation with the swing of the feed lifting component, in this embodiment, the synchronous sliding block 503 is limited in the synchronous sliding groove 504 by a retaining ring 505 sleeved on the synchronous rotating shaft 502.
In this embodiment, the fixing structure 406 is a fixing nut, and a corresponding surface of the small adjusting shaft 405 is provided with a thread adapted to the fixing nut.
Example 2
The present embodiment is based on embodiment 1, and the technical solution is basically the same as embodiment 1, except that:
as shown in fig. 6 or 7, an adjusting eccentric small wheel 407 is further disposed between the adjusting connecting rod 402 and the adjusting crank 403, the adjusting small shaft 405 is located at an axis of the adjusting eccentric small wheel 407, an eccentric small shaft 408 is eccentrically disposed on the adjusting eccentric small wheel 407, the eccentric small shaft 408 is rotatably connected in a shaft sleeve at an end of the adjusting connecting rod 402, a guide surface 409 adapted to a groove wall of the adjusting chute 404 is further disposed on a surface of the adjusting small shaft 405, the guide surface 409 is attached to the groove wall of the adjusting chute 404 and can slide smoothly relative to the groove wall, and can prevent the adjusting eccentric small wheel 407 from rotating relative to the adjusting crank 403, which affects a transmission effect of the adjusting crank 403 on the adjusting connecting rod 402, and the eccentric small shaft 408 is located above the adjusting small shaft 405, which can increase a moment arm of the adjusting crank 403 on the adjusting connecting rod 402, so that transmission of the adjusting crank 403 on the adjusting connecting rod 402 is more labor-saving and smooth, the load of the parts is reduced.
Example 3
The present embodiment is based on embodiment 1, and the technical solution is basically the same as embodiment 1, except that:
as shown in fig. 8 or 9, the eccentric wheel set includes a positioning wheel 204 and a positioning gear 205 which are fixedly sleeved on the driving main shaft 201, and a positioning eccentric wheel 206, an adjusting eccentric wheel 207 and a sliding positioning toothed plate 208 which are rotatably sleeved on the driving main shaft 201, the adjusting eccentric wheel 207 is fixedly installed on one side of the driving connecting rod 202 and extends into a connecting rod shaft hole 209 at the shaft center of the driving connecting rod 202, a gap is left between the cam 210 and the connecting rod shaft hole 209, the positioning eccentric wheel 206 is sleeved in the gap, an eccentric small column 211 is axially arranged at a position of the positioning wheel 204 far from the central shaft thereof, the eccentric small column 211 is rotatably installed in the positioning eccentric wheel 206, a toothed plate sliding groove 212 is opened on an end surface of one side of the adjusting eccentric wheel 207 far from the driving connecting rod 202, and the sliding positioning toothed plate 208 is slidably installed in the toothed plate sliding groove 212, sliding location tooth piece 208 cup joint in drive spindle 201 outside and in its slip direction on the one end tip be provided with locating gear 205 engaged with spacing tooth 213, eccentric wheel set still installs location torsional spring 214, location torsional spring 214 one end fixed mounting is in on the regulation eccentric wheel 207, the other end is arranged in and is seted up in the slot of the terminal surface of spacing tooth 213 one end on the sliding location tooth piece 208, location torsional spring 214 enables sliding location tooth piece 208 slides to locating gear 205, makes spacing tooth 213 with locating gear 205 keeps the engaged state, and this kind of structure is compared in traditional regulation structure simpler, and the friction is littleer, and life is longer, and the operation is more stable smooth, and the noise of production is also littleer.
Furthermore, an eccentric roller hole 215 is formed in the positioning eccentric wheel 206, an eccentric roller 216 is rotatably mounted inside the positioning eccentric wheel, an eccentric small roller hole 217 which is the same as the eccentric roller 216 in the axial direction is formed in the position, far away from the central axis, of the eccentric roller 216, and the eccentric small roller 215 is rotatably mounted in the eccentric small roller hole 217.
Further, a driving ball bearing 218 is arranged between the positioning eccentric 206 and the cam 210 of the adjusting eccentric 207, so that the eccentric rotation between the positioning eccentric 206 and the adjusting eccentric 207 is smoother and smoother.
As shown in fig. 10, a limit screw 219 is circumferentially disposed on the positioning gear 205, two protrusions 220 are disposed on two sides of the tooth sliding slot 212 on the adjusting eccentric wheel 207, the limit screw 219 is located between the two protrusions 219, and the limit screw 219 is matched with the protrusions 220 to form a rotational adjustment angle of the adjusting eccentric wheel 207.
Further, a cloth feed control assembly is provided, which is used in cooperation with the positioning gear 205, the sliding positioning blade 208, the adjusting eccentric 207 and the boss 210.
As shown in fig. 11, the cloth feeding control assembly includes a through button sleeve 601 mounted on a sewing machine housing (not shown in the figure) and a button 602 mounted in the button sleeve 601, the button 602 is slidable in the button sleeve 601, the sliding direction of the button 602 coincides with the sliding direction of the sliding positioning blade 208, and the end of the button 602 is close to the end of the sliding positioning blade 208 far from one end of the limit tooth 213, when the button 602 is pressed, the button 602 pushes the sliding positioning blade 208 to disengage the limit tooth 213 from the positioning gear 205, and this structure is simple and labor-saving, and is not easy to malfunction or damage.
The principle of the embodiment is as follows: the sliding positioning toothed plate 208 is matched with the positioning toothed plate 205, when the cloth feeding control assembly does not press the sliding positioning toothed plate 208, the positioning torsion spring 214 enables the limiting teeth 213 on the sliding positioning toothed plate 208 to be tightly meshed with the positioning toothed plate 205, at this time, the adjusting eccentric wheel 207 cannot rotate relative to the driving main shaft 201, the eccentric amount of the adjusting eccentric wheel 207 and the positioning eccentric wheel 206 cannot be adjusted, when the eccentric amount of the adjusting eccentric wheel 207 and the positioning eccentric wheel 206 needs to be adjusted, the limiting teeth 213 on the sliding positioning toothed plate 208 are disengaged from the positioning toothed plate 205 by pressing the cloth feeding control assembly, at this time, the adjusting eccentric wheel 207 and the driving connecting rod 202 can rotate around the driving main shaft 201, the positioning eccentric wheel 206 is driven to rotate by rotating the driving main shaft 201 and the positioning wheel 204, so that the eccentric amount between the adjusting eccentric wheel 207 and the positioning eccentric wheel 206 is adjusted, and the swing radian of the driving connecting rod, the adjustment of the movement amplitude of the feed dog 101 is realized.
Claims (10)
1. A cloth feeding mechanism of a sewing machine comprises a feed dog assembly, a driving assembly, a feed dog assembly and a cloth feeding assembly, wherein the feed dog assembly comprises a feed dog rack (101), a cloth feeding tooth (102) and a differential tooth (103), the feed dog rack is installed on the feed dog rack (101), the driving assembly comprises a driving main shaft (201) rotatably installed on the sewing machine, the cloth feeding assembly comprises a cloth feeding shaft (401) rotatably installed on the sewing machine, and the cloth feeding mechanism is characterized in that: the cloth feeding assembly further comprises a swinging structure for connecting a cloth feeding shaft (401) and a cloth feeding tooth frame (101), the swinging structure comprises an adjusting connecting rod (402) which is rotatably connected with the cloth feeding tooth frame (101) and an adjusting crank (403) which is fixedly connected with the cloth feeding shaft (401), an adjusting chute (404) which is arranged along the length direction of the adjusting crank (403) is arranged in the adjusting crank (403), an adjusting small shaft (405) is arranged in the adjusting chute (404), the adjusting small shaft (405) is rotatably connected with the adjusting connecting rod (402), a fixing structure (406) for fixing the adjusting small shaft (405) and the adjusting crank (403) is further arranged at one end, far away from the sewing machine, of the adjusting small shaft (405), the cloth feeding assembly comprises a tooth lifting eccentric wheel (301) which is fixed on the driving main shaft (201) and a tooth lifting tooth sliding block (302) which is sleeved on the lifting tooth eccentric wheel (301), the feed dog sliding block (302) is slidably mounted in a feed dog sliding groove (303) formed in the feed dog frame (101), and the feed dog sliding groove (303) is formed along the length direction of the feed dog frame (101).
2. A cloth feeding mechanism of a sewing machine according to claim 1, characterized in that: the driving assembly further comprises a driving connecting rod (202) which is sleeved on the driving main shaft (201) and can eccentrically rotate relative to the driving main shaft (201), a cloth feeding connecting rod crank (203) which is fixedly sleeved on the cloth feeding shaft (401) and rotatably connected with the driving connecting rod (202), and an eccentric wheel set sleeved on the driving main shaft (201).
3. A cloth feeding mechanism of a sewing machine according to claim 1 or 2, characterized in that: the tooth lifting eccentric wheel (301) is an eccentric wheel lug arranged on the driving main shaft (201).
4. A cloth feeding mechanism of a sewing machine according to claim 3, characterized in that: and a ball bearing is further sleeved between the tooth lifting eccentric wheel (301) and the tooth lifting sliding block (302).
5. A cloth feeding mechanism of a sewing machine according to claim 1 or 4, characterized in that: the upper surface and the lower surface of the feed dog sliding block (302) are attached to the groove wall of the feed dog sliding groove (303) of the feed dog frame (101), and the feed dog sliding block (302) is connected to the two surfaces of the feed dog frame (101) in a sliding mode and extends to form a groove (304) used for containing the feed dog frame (101).
6. A cloth feeding mechanism of a sewing machine according to claim 1 or 4, characterized in that: an adjusting eccentric small wheel (407) is further arranged between the adjusting connecting rod (402) and the adjusting crank (403), and the adjusting small shaft (405) is located at the axis of the adjusting eccentric small wheel (407); the small adjusting eccentric wheel (407) is eccentrically provided with a small eccentric shaft (408), the small eccentric shaft (408) is rotatably connected in a shaft sleeve at the end part of the adjusting connecting rod (402), and the surface of the small adjusting shaft (405) is also provided with a guide surface (409) matched with the wall of the adjusting sliding groove (404).
7. The cloth feeding mechanism of a sewing machine according to claim 6, characterized in that: the eccentric small shaft (408) is positioned above the small adjusting shaft (405).
8. A cloth feeding mechanism of a sewing machine according to claim 1 or 7, characterized in that: the tail end of the cloth feeding gripper frame (101) is further provided with a synchronous guiding assembly, the synchronous guiding assembly comprises a synchronous main shaft (501) rotatably mounted on the sewing machine, a synchronous rotating shaft (502) fixedly connected with the synchronous main shaft (501) and a synchronous sliding block (503) rotatably sleeved on the synchronous rotating shaft (502), the synchronous sliding block (503) is slidably mounted in a synchronous sliding groove (504) formed in the tail end of the cloth feeding gripper frame (101), and the synchronous sliding groove (504) is arranged along the length direction of the cloth feeding gripper frame (101).
9. A cloth feeding mechanism of a sewing machine according to claim 8, characterized in that: the synchronous rotating shaft (502) and the synchronous main shaft (501) are arranged eccentrically.
10. A cloth feeding mechanism of a sewing machine according to claim 1 or 7, characterized in that: the adjusting sliding groove (404) is an arc-shaped sliding groove, the bending direction of the adjusting sliding groove is the same as that of the adjusting crank (403), and the circle center of the adjusting sliding groove and the adjusting connecting rod (402) are located on the same side of the adjusting crank (403).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920567504.XU CN210341284U (en) | 2019-04-24 | 2019-04-24 | Cloth feeding mechanism of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920567504.XU CN210341284U (en) | 2019-04-24 | 2019-04-24 | Cloth feeding mechanism of sewing machine |
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| CN210341284U true CN210341284U (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920567504.XU Active CN210341284U (en) | 2019-04-24 | 2019-04-24 | Cloth feeding mechanism of sewing machine |
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| CN (1) | CN210341284U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981751A (en) * | 2021-02-01 | 2021-06-18 | 新沂金垦机械制造有限公司 | Environment-friendly low-noise industrial sewing machine |
| CN115262101A (en) * | 2022-08-02 | 2022-11-01 | 南京苏美达服装技术研发有限公司 | Computer flush joint machine convenient to operation |
-
2019
- 2019-04-24 CN CN201920567504.XU patent/CN210341284U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112981751A (en) * | 2021-02-01 | 2021-06-18 | 新沂金垦机械制造有限公司 | Environment-friendly low-noise industrial sewing machine |
| CN115262101A (en) * | 2022-08-02 | 2022-11-01 | 南京苏美达服装技术研发有限公司 | Computer flush joint machine convenient to operation |
| CN115262101B (en) * | 2022-08-02 | 2023-05-30 | 南京苏美达服装技术研发有限公司 | Computer flush joint machine convenient to operation |
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