CN209957998U - Differential adjusting mechanism of sewing machine - Google Patents
Differential adjusting mechanism of sewing machine Download PDFInfo
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- CN209957998U CN209957998U CN201821937979.5U CN201821937979U CN209957998U CN 209957998 U CN209957998 U CN 209957998U CN 201821937979 U CN201821937979 U CN 201821937979U CN 209957998 U CN209957998 U CN 209957998U
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Abstract
The utility model discloses a sewing machine's differential adjustment mechanism, including cup jointing at sewing machine main epaxial two-link work feed wheel subassembly, connecting rod and control assembly, the connecting rod includes pay-off connecting rod and differential connecting rod, pay-off connecting rod one end is connected two-link work feed wheel subassembly, sewing machine's pay-off axle is connected to the other end, differential connecting rod one end is connected two-link work feed wheel subassembly, the other end is connected the pay-off axle, two-link work feed wheel subassembly includes differential eccentric wheelset and pay-off eccentric wheelset, the pay-off connecting rod rotates to be connected pay-off eccentric wheelset, differential connecting rod rotates to be connected differential eccentric wheelset, control assembly includes pay-off control subassembly and differential control subassembly. The utility model discloses a pay-off dental articulator and differential dental articulator are controlled respectively to two sets of eccentric wheelsets and control assembly, and control is simple and convenient, and the adjustment precision is high, and the part operates steadily smoothly, and the friction of part is less, long service life, and the noise that produces is also less.
Description
Technical Field
The utility model belongs to the technical field of weaving equipment, in particular to sewing machine's differential adjustment mechanism.
Background
The sewing machine generally adopts the feeding tooth and the differential tooth which reciprocate independently to convey the cloth, and the feeding tooth and the differential tooth do not synchronously and differentially move, so that the cloth obtains the conveying power. During sewing operation, sometimes the cloth conveying speed is required to be high, sometimes the cloth conveying speed is required to be low, and the cloth conveying speed can be adjusted by adjusting the speed difference of the movement of the feeding tooth and the differential tooth. In the prior art, the differential mechanism has a complex structure, generates large noise, is inconvenient to adjust and has high assembly precision requirement.
The invention patent with the application number of 201711070922.X discloses a flat seaming machine and a differential cloth feeding mechanism thereof, wherein a second connecting shaft and a second crank arm can be driven to rotate together by rotating a rotating handle, so that the second crank arm drives a fork frame connected to the left end of the second crank arm to move up and down, a first sliding groove on the fork frame drives a connecting sliding block to move up and down together with a sliding sleeve, so that the left end of a first connecting rod moves to different positions of the first crank arm, the length of a force arm actually acted on the first connecting rod by the first crank arm can be adjusted, the movement speed of a differential tooth frame is adjusted, and the cloth conveying speed is finally adjusted. However, the structure occupies a large space, different control assemblies are needed to respectively control the feeding tooth rack and the differential tooth rack, the adjustment precision is not high through the slide block adjustment, and the operation is not stable enough.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a sewing machine's differential adjustment mechanism controls pay-off tooth frame and differential tooth frame respectively through setting up two sets of work feed connecting rod groups for the structure is compacter simple, the mechanism adjustment is convenient accurate more.
In order to realize the purpose, the technical scheme of the utility model is that: a differential adjusting mechanism of a sewing machine comprises a double-connecting-rod cloth feeding wheel assembly sleeved on a main shaft of the sewing machine, a connecting rod and a control assembly, wherein the connecting rod and the control assembly are connected with the double-connecting-rod cloth feeding wheel assembly, the connecting rod comprises a feeding connecting rod and a differential connecting rod, one end of the feeding connecting rod is connected with the double-connecting-rod cloth feeding wheel assembly, the other end of the feeding connecting rod is connected with a feeding shaft of the sewing machine through a feeding connecting rod crank, one end of the differential connecting rod is connected with the double-connecting-rod cloth feeding wheel assembly, the other end of the differential connecting rod is connected with the feeding shaft through the differential connecting rod crank, the double-connecting-rod cloth feeding wheel assembly comprises a differential eccentric wheel set and a feeding eccentric wheel set, the feeding connecting rod is rotatably sleeved with the feeding eccentric wheel set through a feeding connecting rod shaft hole in the end of the feeding connecting rod, the differential connecting rod is rotatably sleeved with the And the component is a differential control component of the eccentricity.
Preferably, one end of the feeding connecting rod crank is rotatably connected to the feeding connecting rod, the other end of the feeding connecting rod crank is fixedly sleeved on the feeding shaft, the differential connecting rod crank is rotatably sleeved on the feeding shaft and extends out of two differential connecting rod crank arms with an included angle alpha, the differential connecting rod crank is rotatably connected with a differential tooth rack of the sewing machine and the differential connecting rod respectively, the feeding shaft is further fixedly sleeved with the feeding tooth rack crank, one end of the feeding tooth rack crank is fixedly sleeved on the feeding shaft, the other end of the feeding tooth rack crank is rotatably connected with the feeding tooth rack of the sewing machine, the feeding shaft is further fixedly sleeved with a retaining ring, the differential connecting rod crank is positioned between the retaining ring and the feeding connecting rod crank, and the retaining ring is matched with the feeding connecting rod crank, so that the differential. .
The technical principle of the utility model is that the eccentric amounts of the feeding eccentric wheel set and the differential eccentric wheel set are respectively adjusted by the feeding control component and the differential control component in cooperation with the main shaft so as to change the swing range of the feeding connecting rod and the differential connecting rod, and the feeding connecting rod crank and the differential connecting rod crank are driven to respectively control the feeding tooth frame and the differential tooth frame so as to control the cloth conveying speed.
Preferably, the feeding eccentric wheel group further comprises a feeding needle punching positioning wheel, a feeding positioning gear, a feeding eccentric wheel, a feeding adjusting eccentric wheel and a feeding sliding positioning toothed sheet, the feeding positioning wheel is fixedly sleeved on the main shaft, the feeding eccentric wheel, the feeding adjusting eccentric wheel and the feeding sliding positioning toothed sheet are rotatably sleeved on the main shaft, the feeding adjusting eccentric wheel is fixedly installed on one side of the feeding connecting rod and extends into a shaft hole of the feeding connecting rod, a gap is reserved between the feeding cam and the shaft hole of the feeding connecting rod, the feeding eccentric wheel is sleeved in the gap, a feeding eccentric small shaft is arranged on the feeding positioning wheel in the axial direction away from the central shaft of the feeding positioning wheel, the feeding eccentric small shaft is rotatably installed on the feeding eccentric wheel, a feeding toothed sheet sliding groove is formed in the end surface of the feeding adjusting eccentric wheel away from the feeding connecting rod, and the feeding sliding, the feeding sliding positioning toothed sheet is sleeved outside the main shaft, and a feeding limiting tooth meshed with the feeding positioning gear is arranged at one end part of the feeding sliding positioning toothed sheet in the sliding direction of the feeding toothed sheet sliding groove. Pay-off eccentric wheel group still installs pay-off location torsional spring, pay-off location torsional spring one end fixed mounting is in on the pay-off regulation eccentric wheel, the other end is arranged in and is seted up in the slot on the side of pay-off sliding location tooth piece pay-off spacing tooth one end, pay-off location torsional spring enables pay-off sliding location tooth piece outwards slides, makes pay-off spacing tooth with pay-off location 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 smooth, and the noise of production is also littleer.
Preferably, the structure of the differential eccentric wheel group is completely the same as that of the feeding eccentric wheel group, and the differential eccentric wheel group is sleeved on the main shaft, the differential eccentric wheel group further comprises a differential needle-opening positioning wheel fixedly sleeved on the main shaft, a differential positioning gear, a differential eccentric wheel rotatably sleeved on the main shaft, a differential adjusting eccentric wheel and a differential sliding positioning toothed sheet, the differential adjusting eccentric wheel is fixedly installed on one side of the differential connecting rod and extends into a shaft hole of the differential connecting rod, a gap is left between the differential cam and the shaft hole of the differential connecting rod, the differential eccentric wheel is sleeved in the gap, a differential eccentric small shaft is arranged on the differential needle-opening positioning wheel in the axial direction away from the central shaft of the differential needle-opening positioning wheel, the differential eccentric small shaft is rotatably installed on the differential eccentric wheel, and a differential toothed sheet sliding groove is arranged on the end surface of the differential adjusting eccentric wheel away, the differential sliding positioning gear is slidably mounted in the differential gear sliding groove, and the differential sliding positioning gear is sleeved outside the main shaft and is provided with differential limiting teeth meshed with the differential positioning gear at one end part in the sliding direction of the differential gear sliding groove. Differential eccentric wheelset still installs differential location torsional spring, differential location torsional spring one end fixed mounting is in on the differential regulation eccentric wheel, the other end is arranged in and is seted up in the slot on the side of differential spacing tooth one end on the differential slip positioning tooth piece, differential location torsional spring enables the outward slip of differential slip positioning tooth piece makes differential spacing tooth with differential 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 smooth, and the noise of production is also littleer. Preferably, a ball bearing is further arranged between the feeding eccentric wheel and the feeding cam of the feeding adjusting eccentric wheel or between the differential eccentric wheel and the differential cam of the differential adjusting eccentric wheel, so that the eccentric rotation between the feeding eccentric wheel and the feeding adjusting eccentric wheel or between the differential eccentric wheel and the differential adjusting eccentric wheel is more stable and smoother.
Preferably, the feeding eccentric wheel or the differential eccentric wheel is further provided with a small eccentric wheel hole, the small eccentric wheel is rotatably arranged inside the feeding eccentric wheel, an eccentric small shaft hole which is the same as the small eccentric wheel in axial direction is formed in the position, away from the central axis, of the small eccentric wheel, and the feeding eccentric small shaft or the differential eccentric small shaft is rotatably arranged in the eccentric small shaft hole.
Preferably, the feeding needle-opening positioning wheel and the differential needle-opening positioning wheel are the same needle-opening positioning wheel and simultaneously drive the feeding eccentric wheel and the differential eccentric wheel to rotate, and the feeding eccentric small shaft and the differential eccentric small shaft are respectively arranged on two end faces of the needle-opening positioning wheel and are coaxially arranged, so that the structure is simplified, and the cost is saved.
Preferably, a limit screw is arranged on the feeding positioning gear or the differential positioning gear in the circumferential direction, two protruding portions are arranged on two sides of the sliding groove on the feeding adjusting eccentric wheel or the differential 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 feeding adjusting eccentric wheel or the differential adjusting eccentric wheel.
Preferably, the control assembly is an open needle assembly or a wrench assembly.
Preferably, the needle opening assembly comprises a needle opening button sleeve which is arranged on a machine shell of the sewing machine and penetrates through the needle opening button sleeve and a needle opening button which is arranged in the needle opening button sleeve, the needle opening button can slide in the needle opening button sleeve, the sliding direction of the needle opening button is superposed with the sliding direction of the feeding sliding positioning toothed sheet or the differential sliding positioning toothed sheet, and the end part of the needle opening button is close to the end part of one end of the feeding sliding positioning toothed sheet or the differential sliding positioning toothed sheet far away from the feeding limiting teeth or the differential limiting teeth, when the needle opening button is pressed, the needle opening button pushes the feeding sliding positioning toothed sheet or the differential sliding positioning toothed sheet to enable the feeding limiting teeth and the feeding positioning gear or the differential limiting teeth and the differential positioning gear to be disengaged, and the structure is simple and labor-saving in operation and not prone to failure or damage.
Preferably, the wrench assembly comprises a wrench, a wrench crank and a wrench shaft which is arranged on a machine shell of the sewing machine and is parallel to the feeding shaft, one end of the wrench is positioned outside the machine shell, the other end of the wrench crank is fixedly connected to the wrench shaft, one end of the wrench crank is fixedly connected to the wrench shaft, the other end of the wrench crank is close to one end part of the feeding sliding positioning toothed sheet or the differential sliding positioning toothed sheet, which is far away from the feeding limiting teeth or the differential limiting teeth, when the wrench is pressed, the wrench crank swings along with the wrench crank, and the swinging of the end part of the wrench crank can push the feeding sliding positioning toothed sheet or the differential sliding positioning toothed sheet to slide, so that the feeding limiting teeth and the feeding positioning gears or the differential limiting teeth and the differential positioning gears are disengaged, and the structure is simple and labor-saving in operation and is not.
When the feeding eccentric wheel set of the utility model is used, the feeding sliding positioning toothed sheet is matched with the feeding positioning gear, when the needle punching component or the wrench component does not press the feeding sliding positioning toothed sheet, the feeding positioning torsion spring enables the feeding limiting teeth on the feeding sliding positioning toothed sheet to be tightly meshed with the feeding positioning gear, at the moment, the feeding adjusting eccentric wheel can not rotate relative to the main shaft, the eccentric amount of the feeding adjusting eccentric wheel and the feeding eccentric wheel can not be adjusted, when the eccentric amount of the feeding adjusting eccentric wheel and the feeding eccentric wheel needs to be adjusted, the feeding limiting teeth on the feeding sliding positioning toothed sheet are released from being meshed with the feeding positioning gear by pressing the needle punching component or the wrench component, the feeding adjusting eccentric wheel and the feeding connecting rod can rotate around the main shaft, at the moment, the feeding eccentric wheel is driven to rotate by rotating the main shaft, thereby the eccentric amount between the feeding adjusting eccentric wheel and the, thereby changing the swing radians of the feeding connecting rod crank and the feeding connecting rod and realizing the adjustment of the movement speed of the feeding tooth rack.
When the differential eccentric wheel set of the utility model is used, the differential sliding positioning toothed sheet is matched with the differential positioning gear, when the needle opening component or the wrench component does not press the differential sliding positioning toothed sheet, the differential positioning torsion spring enables the differential limiting teeth on the differential sliding positioning toothed sheet to be tightly meshed with the differential positioning gear, at the moment, the differential adjusting eccentric wheel can not rotate relative to the main shaft, the eccentric amount of the differential adjusting eccentric wheel and the differential eccentric wheel can not be adjusted, when the eccentric amount of the needle opening component or the wrench component needs to be adjusted, the differential limiting teeth on the differential sliding positioning toothed sheet are released from being meshed with the differential positioning gear by pressing the needle opening component or the wrench component, the differential adjusting eccentric wheel and the differential connecting rod can rotate around the main shaft, at the moment, the main shaft is rotated to drive the differential eccentric wheel to rotate, thereby adjusting the eccentric amount between the differential adjusting eccentric wheel and the differential, thereby changing the swing radians of the differential connecting rod crank and the differential connecting rod and realizing the adjustment of the movement speed of the differential tooth rack.
Preferably, α is 100 ~ 150 degrees, which ensures the swinging angle of the differential link crank and makes the swinging of the differential link crank smoother.
Preferably, a differential sliding block and a differential sliding groove are arranged at the joint of the differential connecting crank arm and the differential tooth rack, the differential sliding groove is formed in the differential tooth rack along the vertical direction, the differential sliding block is slidably mounted in the differential sliding groove, and the differential connecting crank arm is rotatably connected to the differential sliding block.
As preferred, pay-off dental articulator crank with still be provided with pay-off dental articulator crank connecting rod between the pay-off dental articulator, pay-off dental articulator crank connecting rod one end rotate install in pay-off dental articulator, the other end rotate connect in pay-off dental articulator crank, pay-off dental articulator crank connecting rod enables pay-off dental articulator crank with the transmission of pay-off dental articulator is more steady smooth.
As preferred, pay-off dental articulator crank connecting rod with still be provided with adjusting screw between the pay-off dental articulator crank, pay-off dental articulator crank connecting rod tip rotates and cup joints the bolt pin axle that is used for installing adjusting screw, it can hold to have seted up on the pay-off dental articulator crank adjusting screw gliding screw spout, screws up adjusting screw, can with pay-off dental articulator crank with bolt pin axle is fixed, adjusting screw can further adjust the functioning speed of pay-off dental articulator, realizes the fine setting to pay-off dental articulator functioning speed.
Preferably, the screw sliding groove is an arc sliding groove, the angle is beta, and the value of the beta is 30 ~ 90 degrees, so that the adjustment of the adjusting screw is smoother.
The beneficial effects of the utility model are that:
1. the feeding tooth rack and the differential tooth rack are respectively controlled through the two groups of eccentric wheel sets and the control assembly, the control is simple and convenient, the adjustment precision is high, parts run stably and smoothly, the friction of the parts is small, the service life is long, and the generated noise is small;
2. the two groups of eccentric wheel groups form a double-connecting-rod cloth feeding wheel assembly, and share the same main shaft and the same feeding shaft, so that the structure is simpler and more compact, the occupied space is small, the installation and the use are convenient, and the mechanism adjustment is more convenient;
3. the requirement on the assembly precision between the differential sliding block and the differential sliding groove is not high, the processing is convenient, and the noise generated when the machine works is lower;
4. the adjusting screw and the feeding tooth rack crank connecting rod are arranged, so that the differential tooth rack can move more stably and smoothly, and the fine adjustment of the movement speed is facilitated.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an embodiment of the present invention.
Fig. 3 is an exploded view of the structure of the embodiment of the present invention.
Fig. 4 is an installation diagram of a connecting rod according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a differential connecting rod crank according to an embodiment of the present invention.
Fig. 6 is an exploded view of the double-link feeding wheel set according to the embodiment of the present invention.
Fig. 7 is an installation schematic view of the feeding slide positioning tooth plate and the differential slide positioning tooth plate of the embodiment of the present invention.
Fig. 8 is a schematic structural view of the needle opening positioning wheel according to the embodiment of the present invention.
Fig. 9 is an installation schematic view of the opening needle control assembly according to the embodiment of the present invention.
Fig. 10 is a schematic structural view of a wrench control assembly according to an embodiment of the present invention.
Fig. 11 is an installation diagram of the differential slider according to the embodiment of the present invention.
Fig. 12 is a schematic view illustrating installation of an adjusting screw according to an embodiment of the present invention.
Fig. 13 is a schematic structural view of a screw sliding groove according to an embodiment of the present invention.
The items in the figure are respectively: 1 main shaft, 2 double-link cloth feeding wheel assembly, 3 feeding link, 4 differential link, 5 feeding link crank, 6 feeding shaft, 7 differential link crank, 8 feeding link shaft hole, 9 differential link shaft hole, 10 needle punching assembly, 11 wrench assembly, 12 differential link crank arm, 13 differential rack, 14 feeding rack crank, 15 feeding rack, 16a feeding needle punching positioning wheel, 16b differential needle punching positioning wheel, 17a feeding positioning gear, 17b differential positioning gear, 18a feeding eccentric wheel, 18b differential eccentric wheel, 19a feeding adjusting eccentric wheel, 19b differential adjusting eccentric wheel, 20a feeding sliding positioning rack, 20b differential sliding positioning rack, 21a feeding cam, 21b differential cam, 22a feeding eccentric small shaft, 22b differential eccentric small shaft, 23a feeding limit tooth, 23b differential limit tooth, 24a feeding positioning torsion spring, 24b differential positioning torsion spring, 25a feeding toothed piece sliding groove, 25b differential toothed piece sliding groove, 26 small eccentric wheel hole, 27 small eccentric wheel, 28 eccentric small shaft hole, 29 limit screw, 30 boss, 31 retaining ring, 32 needle opening button sleeve, 33 needle opening button, 34 wrench, 35 wrench crank, 36 wrench shaft, 37 differential sliding block, 38 differential sliding groove, 39 feeding toothed rack crank connecting rod, 40 adjusting screw, 41 screw pin shaft, 42 screw sliding groove and 43 ball bearing.
Detailed Description
The technical solution of the present invention will be described in detail with reference to the accompanying drawings of the embodiments, and it should be noted that, in this embodiment, the rotation connection is realized by the cooperation of the rotation shaft and the shaft hole.
As shown in fig. 1 ~ 3, a differential adjustment mechanism of a sewing machine includes a double-link feeding cloth wheel assembly 2 sleeved on a main shaft 1 of the sewing machine, a connecting rod and a control assembly connected with the double-link feeding cloth wheel assembly 2, wherein the connecting rod includes a feeding connecting rod 3 and a differential connecting rod 4, one end of the feeding connecting rod 3 is connected to the double-link feeding cloth wheel assembly 2, the other end is connected to a feeding shaft 6 of the sewing machine through a feeding connecting rod crank 5, one end of the differential connecting rod 4 is connected to the double-link feeding cloth wheel assembly 2, the other end is connected to the feeding shaft 6 through a differential connecting rod crank 7, the double-link feeding cloth wheel assembly 2 includes a differential eccentric wheel set and a feeding eccentric wheel set, the feeding connecting rod 3 is rotatably sleeved on the feeding eccentric wheel set through a feeding connecting rod shaft hole 8 at an end thereof, the differential connecting rod 4 is rotatably sleeved on the differential eccentric wheel set through a differential connecting rod shaft hole 9 at an end thereof, and the control assembly includes a feeding control assembly for adjusting the eccentricity of the feeding eccentric wheel set and a.
As shown in fig. 4 and 5, one end of the feeding connecting rod crank 5 is rotatably connected to the feeding connecting rod 3, the other end is fixedly sleeved on the feeding shaft 6, the differential connecting rod crank 7 is rotatably sleeved on the feeding shaft 6 and extends out of two differential connecting rod crank arms 12 with an included angle alpha, the differential connecting rod crank arms are respectively rotatably connected with a differential tooth rack 13 of the sewing machine and the differential connecting rod 4, a feeding tooth rack crank 14 is fixedly sleeved on the feeding shaft 6, one end of the feeding tooth rack crank 14 is fixedly sleeved on the feeding shaft 6, the other end is rotatably connected with a feeding tooth rack 15 of the sewing machine, the feeding shaft 6 is also fixedly sleeved with a retainer ring 31, the differential connecting rod crank 7 is positioned between the retainer ring 31 and the feeding connecting rod crank 5, the retainer ring 31 is engaged with the feed link crank 5 to prevent the differential link crank 7 from sliding in the axial direction of the feed shaft 6.
The technical principle of the utility model is that the eccentric amounts of the feeding eccentric wheel set and the differential eccentric wheel set are respectively adjusted by the feeding control component and the differential control component in cooperation with the main shaft 1 to change the swing amplitude of the feeding connecting rod 3 and the differential connecting rod 4, and the feeding connecting rod crank 5 and the differential connecting rod crank 7 are driven to respectively control the feeding tooth frame 15 and the differential tooth frame 13, so as to control the cloth conveying speed.
As shown in fig. 6 ~ 7, the feeding eccentric wheel set includes a feeding needle punching positioning wheel 16a, a feeding positioning gear 17a fixedly sleeved on the main shaft 1, and a feeding eccentric wheel 18a, a feeding adjusting eccentric wheel 19a, and a feeding sliding positioning toothed piece 20a rotatably sleeved on the main shaft 1, the feeding adjusting eccentric wheel 19a is fixedly installed at one side of the feeding connecting rod 3 and extends into the feeding connecting rod shaft hole 8 to form a feeding cam 21a, a gap is reserved between the feeding cam 21a and the feeding connecting rod shaft hole 8, the feeding eccentric wheel 18a is sleeved in the gap, a feeding eccentric small shaft 22a is axially arranged at a position where the feeding needle punching positioning wheel 16a is far away from the central shaft, the feeding eccentric small shaft 22a is rotatably installed on the feeding eccentric wheel 18a, a feeding toothed piece sliding groove 25a is formed in an end face of the feeding adjusting eccentric wheel 19a far away from the feeding connecting rod 3, the feeding sliding positioning toothed piece 20a is slidably installed in the feeding toothed piece sliding groove 25a, the feeding sliding positioning toothed piece 20a is sleeved outside the main shaft 1 and installed in a sliding groove 25a sliding groove of the feeding eccentric positioning gear 23a, and a sliding positioning toothed piece is installed in a sliding groove of a, and a sliding positioning gear groove of a sliding adjusting eccentric spring, and a sliding groove of a sliding positioning gear 23a, and a sliding groove of a positioning gear is more easily installed in a positioning mechanism, and a positioning mechanism of a positioning eccentric spring is installed in a structure of a structure for stabilizing a torsion spring for adjusting eccentric spring for adjusting toothed piece for adjusting a simple structure for.
As shown in fig. 6 ~ 7, the structure of the differential eccentric wheel set is completely the same as that of the feeding eccentric wheel set, and the differential eccentric wheel set is sleeved on the main shaft 1, the differential eccentric wheel set includes a differential open-pin positioning wheel 16b fixedly sleeved on the main shaft 1, a differential positioning gear 17b, a differential eccentric wheel 18b rotatably sleeved on the main shaft 1, a differential adjusting eccentric wheel 19b, and a differential sliding positioning toothed sheet 20b, the differential adjusting eccentric wheel 19b is fixedly installed on one side of the differential connecting rod 4 and extends into a differential connecting rod shaft hole 9, a gap is left between the differential cam 21b and the differential connecting rod shaft hole 9, the differential eccentric wheel 18b is sleeved in the gap, a differential eccentric small shaft 22b is axially installed on the differential open-pin positioning wheel 16b far from the central shaft thereof, the differential eccentric shaft 22b is rotatably installed on the differential eccentric wheel 18b, a differential adjusting toothed sheet chute 25b is installed on an end surface of the differential adjusting eccentric wheel 19b far from the differential connecting rod 4, the differential adjusting toothed sheet 20b is installed in the differential sliding positioning toothed sheet 25b, one end of the differential adjusting eccentric gear 20b is installed on the differential sliding positioning eccentric gear groove, and the differential limiting toothed sheet 23b, the differential adjusting toothed sheet is installed on the differential limiting eccentric wheel set, the differential limiting toothed sheet, the differential sliding groove, the differential adjusting toothed sheet is more smoothly, the differential sliding positioning toothed sheet is installed on the differential limiting toothed sheet, the differential sliding side of the differential adjusting eccentric wheel set, the differential adjusting toothed sheet 23b, the differential adjusting eccentric wheel set, the differential adjusting toothed sheet, the differential adjusting eccentric wheel set is more smoothly, the differential sliding positioning gear 20b, the differential sliding positioning gear set is installed on the differential sliding groove, the differential sliding positioning gear set, the differential.
Further, in this embodiment, the feeding eccentric wheel 18a and the differential eccentric wheel 18b are both provided with a small eccentric wheel hole 26, a small eccentric wheel 27 is rotatably mounted inside, an eccentric small shaft hole 28 which is the same as the small eccentric wheel 27 in the axial direction is formed at a position of the small eccentric wheel 27 far away from the central axis, and the feeding eccentric small shaft 22a or the differential eccentric small shaft 22b is rotatably mounted in the eccentric small shaft hole 28.
In the present embodiment, ball bearings 43 are further disposed between the feeding eccentric 18a and the feeding cam 21a of the feeding adjusting eccentric 19a and between the differential eccentric 18b and the differential cam 21b of the differential adjusting eccentric 19b, so that the eccentric rotation between the feeding eccentric 18a and the feeding adjusting eccentric 19a and between the differential eccentric 18b and the differential adjusting eccentric 19b is smoother.
As shown in fig. 8, in this embodiment, the feeding opening positioning wheel 16a and the differential opening positioning wheel 16b are the same opening positioning wheel, and drive the feeding eccentric wheel 18a and the differential eccentric wheel 18b to rotate at the same time, and the feeding eccentric small shaft 22a and the differential eccentric small shaft 22b are respectively disposed on two end surfaces of the opening positioning wheel and coaxially disposed, so that the structure is simplified, and the cost is saved.
As shown in fig. 7, in the present embodiment, the feeding positioning gear 17a and the differential positioning gear 17b are provided with a limit screw 29 in the circumferential direction, two protrusions 30 are provided on both sides of the feeding rack runner 25a on the feeding adjusting eccentric 19a and both sides of the differential rack runner 25b on the differential adjusting eccentric 19b, the limit screw 29 is located between the two protrusions 30, and the limit screw 29 cooperates with the protrusions 30 to form the rotational adjustment angle of the feeding adjusting eccentric 19a and the differential adjusting eccentric 19 b.
In this embodiment, the feeding control assembly is an opening needle assembly 10, and the differential control assembly is a wrench assembly 11.
As shown in fig. 9, the needle opening assembly 10 includes a needle opening button sleeve 32 installed on a casing (not shown) of the sewing machine and a needle opening button 33 installed in the needle opening button sleeve 32, the needle opening button 33 is slidable in the needle opening button sleeve 32, a sliding direction of the needle opening button 33 coincides with a sliding direction of the feeding sliding positioning teeth 20a, and an end of the needle opening button 33 is close to an end of the feeding sliding positioning teeth 20a far from the feeding limit teeth 23a, when the needle opening button 33 is pressed, the needle opening button 33 pushes the feeding sliding positioning teeth 20 to disengage the feeding limit teeth 23a from the feeding positioning gear 17a, which is simple and labor-saving in structure operation and is not prone to malfunction or damage.
As shown in fig. 10, the wrench assembly 11 includes a wrench 34, a wrench crank 35 and a wrench shaft 36 installed on the machine housing of the sewing machine and parallel to the feeding shaft 6, one end of the wrench 34 is located outside the machine housing, the other end is fixedly connected to the wrench shaft 36, one end of the wrench crank 35 is fixedly connected to the wrench shaft 36, and the other end is close to one end of the differential sliding positioning tooth piece 20b far away from the differential limiting tooth 17b, when the wrench 34 is pressed, the wrench crank 35 swings therewith, and the swing of the end can push the differential sliding positioning tooth piece 20b to slide, so that the differential limiting tooth 23b and the differential positioning gear 17b are disengaged, which is simple and labor-saving in operation and is not easy to malfunction or damage.
When the feeding eccentric wheel set of the utility model is used, the feeding sliding positioning toothed piece 20a is matched with the feeding positioning gear 17a, when the needle punching component 10 does not press the feeding sliding positioning toothed piece 20a, the feeding positioning torsion spring 24a makes the feeding limiting teeth 23a on the feeding sliding positioning toothed piece 20a tightly engaged with the feeding positioning gear 17a, at this time, the feeding adjusting eccentric wheel 19a can not rotate relative to the main shaft 1, the eccentric amount of the feeding adjusting eccentric wheel 19a and the feeding eccentric wheel 18a can not be adjusted, when the eccentric amount of the feeding adjusting eccentric wheel and the feeding eccentric wheel 18a needs to be adjusted, the feeding limiting teeth 23a on the feeding sliding positioning toothed piece 20a are released from being engaged with the feeding positioning gear 17a by pressing the needle punching component 10, at this time, the feeding adjusting eccentric wheel 19a and the feeding connecting rod 3 can rotate around the main shaft 1, and the main shaft 1 is rotated to drive the feeding eccentric wheel 18a to rotate, thereby adjusting the eccentricity between the feeding adjusting eccentric wheel 19a and the feeding eccentric wheel 18a, changing the swing radians of the feeding connecting rod crank 5 and the feeding connecting rod 3, and realizing the adjustment of the movement speed of the feeding tooth rack 15.
When the differential eccentric wheel set of the utility model is used, the differential sliding positioning toothed piece 20b is matched with the differential positioning gear 17b, when the wrench assembly 11 does not press the differential sliding positioning toothed piece 20b, the differential positioning torsion spring 24b makes the differential limiting teeth 23b on the differential sliding positioning toothed piece 20b tightly engaged with the differential positioning gear 17b, at this time, the differential adjusting eccentric wheel 19b can not rotate relative to the main shaft 1, the eccentric amount of the differential adjusting eccentric wheel 19b and the differential eccentric wheel 18b can not be adjusted, when the eccentric amount of the two needs to be adjusted, the differential limiting teeth 23b on the differential sliding positioning toothed piece 20b are released from engagement with the differential positioning gear 17b by pressing the wrench assembly 11, at this time, the differential adjusting eccentric wheel 19b and the differential connecting rod 4 can rotate around the main shaft 1, and the differential eccentric wheel 19b is driven to rotate by rotating the main shaft 1, thereby adjusting the eccentricity between the differential adjusting eccentric wheel 19b and the differential eccentric wheel 18b, changing the swing radian of the differential connecting rod crank 7 and the differential connecting rod 4, and realizing the adjustment of the movement speed of the differential tooth rack 13.
As shown in fig. 5, α is 100 ~ 150 degrees, preferably 120 degrees in the present embodiment, and ensures the swing angle of the differential link crank 7 and makes the swing of the differential link crank 7 smoother.
As shown in fig. 11, a differential slider 37 and a differential sliding groove 38 are provided at a connection portion of the differential link crank arm 12 and the differential carrier 13, the differential sliding groove 38 is vertically opened on the differential carrier 13, the differential slider 37 is slidably mounted in the differential sliding groove 38, and the differential link crank arm 12 is rotatably connected to the differential slider 37.
As shown in fig. 12, a feeding tooth rack crank connecting rod 39 is further arranged between the feeding tooth rack crank 14 and the feeding tooth rack 15, one end of the feeding tooth rack crank connecting rod 39 is rotatably installed on the feeding tooth rack 15, the other end of the feeding tooth rack crank connecting rod 39 is rotatably connected to the feeding tooth rack crank 14, and the feeding tooth rack crank 14 and the feeding tooth rack 15 can be more stably and smoothly driven by the feeding tooth rack crank connecting rod 39.
Furthermore, an adjusting screw 40 is further arranged between the feeding dental frame crank connecting rod 39 and the feeding dental frame crank 14, a screw pin shaft 41 for installing the adjusting screw 40 is sleeved at the end of the feeding dental frame crank connecting rod 39 in a rotating manner, a screw sliding groove 42 capable of accommodating the adjusting screw 40 in a sliding manner is formed in the feeding dental frame crank 14, and the feeding dental frame crank 14 and the screw pin shaft 41 can be fixed by screwing the adjusting screw 40. The adjusting screw 40 can further adjust the running speed of the feeding tooth rack 15, and the running speed of the feeding tooth rack 15 can be finely adjusted.
As shown in fig. 13, the screw slot 42 is an arc slot, and the angle is β, and β has a value of 30 ~ 90 °, in this embodiment, preferably 45 °, so that the adjustment of the adjusting screw 40 is smoother.
Claims (10)
1. A differential adjustment mechanism of a sewing machine is characterized in that: the double-connecting-rod cloth feeding wheel assembly comprises a double-connecting-rod cloth feeding wheel assembly (2) sleeved on a main shaft (1) of a sewing machine, a connecting rod and a control assembly, wherein the connecting rod is connected with the double-connecting-rod cloth feeding wheel assembly (2) in a sleeved mode, the connecting rod comprises a feeding connecting rod (3) and a differential connecting rod (4), one end of the feeding connecting rod (3) is connected with the double-connecting-rod cloth feeding wheel assembly (2), the other end of the feeding connecting rod is connected with a feeding shaft (6) of the sewing machine through a feeding connecting rod crank (5), one end of the differential connecting rod (4) is connected with the double-connecting-rod cloth feeding wheel assembly (2), the other end of the differential connecting rod is connected with the feeding shaft (6) through a differential connecting rod crank (7), the double-connecting-rod cloth feeding wheel assembly (2) comprises a differential eccentric wheel set and a feeding eccentric wheel set, the feeding connecting rod (3) is rotatably sleeved The control assembly comprises a feeding control assembly for adjusting the eccentricity of the feeding eccentric wheel set and a differential control assembly for adjusting the eccentricity of the differential eccentric wheel set.
2. The differential adjusting mechanism of a sewing machine according to claim 1, characterized in that: one end of the feeding connecting rod crank (5) is rotatably connected to the feeding connecting rod (3), the other end of the feeding connecting rod crank (5) is fixedly sleeved on the feeding shaft (6), the differential connecting rod crank (7) is rotatably sleeved on the feeding shaft (6) and extends out of two differential connecting rod crank arms (12) with included angles alpha, a differential tooth frame (13) of the sewing machine and the differential connecting rod (4) are respectively rotatably connected, a feeding tooth frame crank (14) is further fixedly sleeved on the feeding shaft (6), one end of the feeding tooth frame crank (14) is fixedly sleeved on the feeding shaft (6), and the other end of the feeding tooth frame crank is rotatably connected to a feeding tooth frame (15) of the sewing machine.
3. The differential adjusting mechanism of a sewing machine according to claim 1 or 2, characterized in that: the feeding eccentric wheel set further comprises a feeding needle punching positioning wheel (16 a) and a feeding positioning gear (17 a) which are fixedly sleeved on the main shaft (1), and a feeding eccentric wheel (18 a), a feeding adjusting eccentric wheel (19 a) and a feeding sliding positioning toothed sheet (20 a) which are rotatably sleeved on the main shaft (1), the feeding adjusting eccentric wheel (19 a) is fixedly installed on one side of the feeding connecting rod (3) and extends into a feeding cam (21 a) in a feeding connecting rod shaft hole (8), a gap is reserved between the feeding cam (21 a) and the feeding connecting rod shaft hole (8), the feeding eccentric wheel (18 a) is sleeved in the gap, a feeding eccentric small shaft (22 a) is arranged in the axial direction of the feeding needle punching positioning wheel (16 a) far away from the central shaft of the feeding eccentric wheel, and the feeding eccentric small shaft (22 a) is rotatably installed on the feeding eccentric wheel (18 a), pay-off adjust eccentric wheel (19 a) and keep away from pay-off link (3) have been seted up on the terminal surface pay-off pinion chute (25 a), pay-off sliding positioning pinion (20 a) slidable mounting in pay-off pinion chute (25 a), pay-off sliding positioning pinion (20 a) cup joint in main shaft (1) is outside and be in pay-off pinion chute (25 a) one end tip in the slip direction be provided with pay-off positioning gear (17 a) engaged with pay-off spacing tooth (23 a), pay-off eccentric wheelset still installs pay-off location torsional spring (24 a), pay-off location torsional spring (24 a) one end fixed mounting be in on pay-off adjust eccentric wheel (19 a), the other end is arranged in and is seted up in the slot on the side of pay-off sliding positioning pinion (20 a) last pay-off spacing tooth (23 a) one end.
4. A differential adjusting mechanism of a sewing machine according to claim 3, characterized in that: the differential eccentric wheel set further comprises a differential needle-opening positioning wheel (16 b) and a differential positioning gear (17 b) which are fixedly sleeved on the main shaft (1), and a differential eccentric wheel (18 b), a differential adjusting eccentric wheel (19 b) and a differential sliding positioning toothed sheet (20 b) which are rotatably sleeved on the main shaft (1), the differential adjusting eccentric wheel (19 b) is fixedly installed on one side of the differential connecting rod (4) and extends into a differential cam (21 b) in a differential connecting rod shaft hole (9), a gap is reserved between the differential cam (21 b) and the differential connecting rod shaft hole (9), the differential eccentric wheel (18 b) is sleeved in the gap, a differential eccentric small shaft (22 b) is arranged in the axial direction of the differential needle-opening positioning wheel (16 b) far away from the central shaft of the differential cam, and the differential eccentric small shaft (22 b) is rotatably installed on the differential eccentric wheel (18 b), differential pinion chute (25 b) has been seted up on the terminal surface of differential connecting rod (4) is kept away from to differential regulation eccentric wheel (19 b), differential slide positioning pinion (20 b) slidable mounting in differential pinion chute (25 b), differential slide positioning pinion (20 b) cup joint in main shaft (1) outside and in the ascending one end tip of differential pinion chute (25 b) slip direction is provided with differential spacing tooth (23 b) that differential positioning gear (17 b) engaged with, differential eccentric wheelset still installs differential positioning torsional spring (24 b), differential positioning torsional spring (24 b) one end fixed mounting is in on differential regulation eccentric wheel (19 b), the other end arrange in set up in the slot on the side of differential spacing tooth (23 b) one end on differential slide positioning pinion (20 b).
5. The differential adjusting mechanism of a sewing machine according to claim 4, characterized in that: the control assembly is a needle opening assembly (10) or a wrench assembly (11), the wrench assembly (11) comprises a wrench (34), a wrench crank (35) and a wrench shaft (36) which is arranged on a machine shell of the sewing machine and is parallel to the feeding shaft (6), one end of the wrench (34) is located outside the machine shell, the other end of the wrench crank (34) is fixedly connected to the wrench shaft (36), one end of the wrench crank (35) is fixedly connected to the wrench shaft (36), and the other end of the wrench crank is close to the end part, away from the feeding limit tooth (23 a) or the differential limit tooth (23 b), of the feeding sliding positioning tooth piece (20 a) or the differential sliding positioning tooth piece (20 b).
6. The differential adjusting mechanism of a sewing machine according to claim 2, characterized in that: the differential connecting rod crank arm (12) is provided with a differential sliding block (37) and a differential sliding groove (38) at the joint of the differential connecting rod crank arm (12) and the differential tooth rack (13), the differential sliding groove (38) is arranged on the differential tooth rack (13) along the vertical direction, the differential sliding block (37) is installed in the differential sliding groove (38) in a sliding mode, and the differential connecting rod crank arm (12) is connected to the differential sliding block (37) in a rotating mode.
7. The differential adjusting mechanism of a sewing machine according to claim 2, characterized in that: pay-off dental articulator crank (14) with still be provided with pay-off dental articulator crank connecting rod (39) between pay-off dental articulator (15), pay-off dental articulator crank connecting rod (39) one end rotate install in pay-off dental articulator (15), the other end rotate connect in pay-off dental articulator crank (14).
8. The differential adjusting mechanism of a sewing machine according to claim 7, characterized in that: pay-off dental articulator crank connecting rod (39) with still be provided with adjusting screw (40) between pay-off dental articulator crank (14), pay-off dental articulator crank connecting rod (39) tip rotates and is connected with screw round pin axle (41) that are used for installing adjusting screw (40), seted up on pay-off dental articulator crank (14) and held adjusting screw (40) gliding screw spout (42).
9. The differential adjustment mechanism of a sewing machine of claim 2, wherein α is 100 ~ 150 degrees.
10. The differential adjustment mechanism of a sewing machine according to claim 8, characterized in that the screw slot (42) is an arc slot with an angle β, β having a value of 30 ~ 90 °.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821937979.5U CN209957998U (en) | 2018-11-23 | 2018-11-23 | Differential adjusting mechanism of sewing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821937979.5U CN209957998U (en) | 2018-11-23 | 2018-11-23 | Differential adjusting mechanism of sewing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109402876A (en) * | 2018-11-23 | 2019-03-01 | 浙江乐江机械有限公司 | A kind of differential regulating mechanism of sewing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109402876A (en) * | 2018-11-23 | 2019-03-01 | 浙江乐江机械有限公司 | A kind of differential regulating mechanism of sewing machine |
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