CN107059269A - Thread shearing device of sewing machine - Google Patents
Thread shearing device of sewing machine Download PDFInfo
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- CN107059269A CN107059269A CN201611205865.7A CN201611205865A CN107059269A CN 107059269 A CN107059269 A CN 107059269A CN 201611205865 A CN201611205865 A CN 201611205865A CN 107059269 A CN107059269 A CN 107059269A
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- axle sleeve
- sewing machine
- cutter shaft
- shaft
- cutter
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B65/00—Devices for severing the needle or lower thread
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Sewing Machines And Sewing (AREA)
Abstract
The invention provides a kind of thread shearing device of sewing machine, belong to field of mechanical technique.The problem of it solves that existing thread shearing device of sewing machine structure is compact, space-consuming big, has a strong impact on sewing machine outward appearance.This thread shearing device of sewing machine, including fixed seat, the side of fixed seat has blade mounting seat, the end of blade mounting seat is fixed with bottom knife, the supported hole extended along fixed seat length direction is additionally provided with blade mounting seat, the cutter shaft that can be rotated along own central axis line with supported hole precision-fit is equipped with supported hole, one end of cutter shaft is fixed with the cutter for engaging and setting with bottom knife, fixed seat, which is provided with, to be used to drive the actuator that cutter shaft is rotated along own central axis line, the actuator is coaxially disposed with cutter shaft and is connected by drive mechanism with cutter shaft, the adjustment structure for being used for making cutter be tightly engaged with bottom knife all the time is provided between cutter shaft and blade mounting seat.The present invention have compact conformation, occupy little space, easy for installation and low cost and other advantages.
Description
Technical field
The invention belongs to field of mechanical technique, it is related to a kind of thread shearing device of sewing machine.
Background technology
With continuing to develop for scientific and technological level, the automaticity more and more higher of sewing machine is general on existing sewing machine
Be designed with automatic shearing mechanism, cloth be put into sewing machine start sewing in place after, it is possible to use automatic shearing mechanism will be stitched
Line is cut to make suture be separated with cloth, can so save the sewing time, the labor intensity of reduction sewing workman.
For example, Chinese patent discloses a kind of thread shearing device of sewing machine [Authorization Notice No. is CN204959277U], including
Power set, power set connection fixture, fixture connects one end of transmission arm, the other end edge of transmission arm by universal driving shaft
Axial restraint connects knife bar；Power set can drive knife bar to rotate；One end of knife bar is fixedly installed cutting blade, cutting blade
Side is fixedly installed fixed blade；Knife bar rotate when, cutting blade can be driven to be rotated relative to fixed blade, thus with quiet knife
Piece touches to form cutting force.Knife group is constituted by cutting blade and fixed blade, power set and knife group are regard as two individual components point
It is not fitted into sewing machine, because it is split-type structural, power set are external, take up space, influences the attractive in appearance of sewing machine entirety
Property, and assemble cumbersome, cost is high.
For solve cutting facility power it is external the problem of, Chinese patent disclose again another sewing machine function-driven device and
Sewing machine [application publication number CN105908400A], puts including the motor in head, motor is interior to have rotating shaft one, rotating shaft one
It is horizontally disposed with and perpendicular to the main shaft of sewing machine, the two ends of rotating shaft one are respectively end one and end two and end one and end two
Stretch out and cam member one is fixed with the outside of motor body, end one, cam member one drives sewing machine by clutch
Thread cutting mechanism is acted, and cam member two is fixed with end two.Cam member one and cam member two are set respectively at the two ends of motor, electricity
The two ends of machine can complete specific function, main to be so that electric machine built-in.
In order that the interactively obtained between cam member one and connecting rod one is more flexible, interact more smoothly, cam
Part one includes connecting rod three, and one section of connecting rod three is fixed in the rotating shaft one of motor, and the other end of connecting rod three is provided with bearing or axle sleeve.
The drivening rod one of cam member one is acted during work, and connecting rod one drives lever to be axially moved, and the kind of drive is complicated, and motor and lever are not
It is integral structure, installs inconvenient.
The content of the invention
The purpose of the present invention is there is above mentioned problem for existing technology, it is proposed that a kind of compact conformation, space-consuming
Small thread shearing device of sewing machine.
The purpose of the present invention can be realized by following technical proposal：
This thread shearing device of sewing machine, including fixed seat, the side of the fixed seat have blade mounting seat, the blade peace
The end of dress seat is fixed with the supported hole for being additionally provided with and extending along fixed seat length direction in bottom knife, blade mounting seat, described
The cutter shaft that can be rotated along own central axis line with supported hole precision-fit is equipped with supported hole, one end of the cutter shaft is fixed with
The cutter set is engaged with bottom knife, it is characterised in that described fixed seat, which is provided with, to be used to drive cutter shaft along own central axis
The actuator that line is rotated, the actuator is coaxially disposed with cutter shaft and is connected by drive mechanism with cutter shaft, described cutter shaft and knife
The adjustment structure for being used for making cutter be tightly engaged with bottom knife all the time is provided between piece mounting seat.
In above-mentioned thread shearing device of sewing machine, described drive mechanism include outer shaft and be arranged in outer shaft with
The internal axle sleeve that outer shaft is equipped with, is provided between described outer shaft and internal axle sleeve when outer shaft/internal axle sleeve is in actuator
Linkage unit when being axially moved under effect for driving internal axle sleeve/outer shaft to be rotated along own central axis line.
Drive mechanism has two kinds of situations：When outer shaft is being axially moved in the presence of actuator in linkage unit driving
Axle sleeve is rotated along own central axis line；When internal axle sleeve is being axially moved in the presence of actuator, linkage unit driving outer shaft is along certainly
Body axis is rotated.
In above-mentioned thread shearing device of sewing machine, described outer shaft and the output shaft of actuator are coaxially connected, described
Cutter shaft is located in internal axle sleeve and set with internal axle sleeve coaxial cooperation, provided with circumferential spacing knot between described cutter shaft and internal axle sleeve
Structure, described linkage unit include at least one helical orbit one on internal axle sleeve and on outer shaft its it is inner with
The spacer pin one that helical orbit one is slidably matched, the quantity of the spacer pin one is equal with the quantity of helical orbit one and spacer pin
One corresponds setting with helical orbit one.The position of helical orbit one and spacer pin one can be exchanged, i.e., by helical orbit one
Set on outer shaft, it is also feasible that spacer pin one, which is set on internal axle sleeve,.
Cross section of the helical orbit one along internal axle sleeve radially is curved, in order to ensure that the inner of spacer pin one can accurately match somebody with somebody
Close and can well be slided in helical orbit one, the inner of spacer pin one is in spherical.The installation of spacer pin one for convenience, outside
Radial screw bore is opened up on axle sleeve, spacer pin one is fixed in radial screw bore by way of screw thread, its inner is wanted can be in spiral shell
Well slided in rotation track one.
In above-mentioned thread shearing device of sewing machine, described helical orbit one is 1-6.
In above-mentioned thread shearing device of sewing machine, described helical orbit one is 2.When helical orbit one is 2, edge
The axis of internal axle sleeve is symmetrical, it is ensured that stationarity during linkage between internal axle sleeve and outer shaft, improves transmission accuracy, so that
Ensure the running accuracy of internal axle sleeve.
In above-mentioned thread shearing device of sewing machine, described helical orbit one is 3.Similarly, 3 helical orbits one are in ring
Shape array distribution, it is ensured that stationarity during linkage between internal axle sleeve and outer shaft, improves transmission accuracy.
In above-mentioned thread shearing device of sewing machine, described internal axle sleeve and the output shaft of actuator are coaxially connected, described
Cutter shaft is coaxially located in outer shaft and cutter shaft and outer shaft are circumferentially fixed, and described linkage unit includes at least one located at outer
Helical orbit two on axle sleeve and its inner spacer pin two being slidably matched with helical orbit two, the limit on internal axle sleeve
The quantity of position pin two is equal with the quantity of helical orbit two and spacer pin two is correspondingly arranged with helical orbit 211.Helical orbit
Two can exchange with the position of spacer pin two, i.e., set on internal axle sleeve helical orbit two, spacer pin two is set into outer shaft
It is also feasible to put.
In above-mentioned thread shearing device of sewing machine, described helical orbit two is 1-6.
In above-mentioned thread shearing device of sewing machine, described helical orbit two is 2.When helical orbit two is 2, edge
The axis of outer shaft is symmetrical, it is ensured that stationarity during linkage between outer shaft and internal axle sleeve, improves transmission accuracy, so that
Ensure the running accuracy of outer shaft.
In above-mentioned thread shearing device of sewing machine, described helical orbit two is 3.Similarly, 3 helical orbits two are in ring
Shape array distribution, it is ensured that stationarity during linkage between outer shaft and internal axle sleeve, improves transmission accuracy.
In above-mentioned thread shearing device of sewing machine, described circumferential position limiting structure include spacing plane on cutter shaft and
The limited post set with spacing plane abutment on internal axle sleeve, described internal axle sleeve is provided with positioning hole, and described is spacing
Post is located in positioning hole.
Limited post can be directly anchored in positioning hole by way of screw thread, require that the inner of limited post reclines after fixing
In spacing plane, its outer end can not protrude the outer surface of internal axle sleeve, prevent from interfering with outer shaft.
In above-mentioned thread shearing device of sewing machine, the pitch of the helical orbit one is 10-100mm.So set to prevent
Only with internal axle sleeve locking phenomenon occurs for spacer pin one.
In above-mentioned thread shearing device of sewing machine, described actuator is cylinder, and the cylinder piston rod stretches out cylinder body
There is the internal thread hole that on external screw thread, above-mentioned outer shaft there is the piston rod with cylinder to be coaxially disposed, the cylinder on part
Piston rod thread be connected in the internal thread hole of outer shaft.
Outer shaft in tubbiness and has bottom close to one end of cylinder, and wherein internal thread hole is opened in the centre bit of bottom
Put.To improve the connective stability of outer shaft and cylinder piston rod, it is threaded with the piston rod of cylinder and is resisted against outer shaft
The locking nut put, to ensure that outer shaft is not rotated with cylinder piston rod.
The cross section that this place piston rod is located at cylinder interior part is in polygon, it is ensured that piston rod is not rotated in cylinder body,
Cylinder does not rotate in itself simultaneously.Being provided with fixed seat on support base, support base has the mounting hole coaxial with cutter shaft, and cylinder is same
Axle is fixed in the mounting hole.Certainly, actuator can also be rotary cylinder, now need the radial rotating progress to outer shaft
Limitation.
Wherein actuator can also be that hydraulic cylinder, push-pull electromagnet or any output shaft can axles in addition to for cylinder
To the power source of motion.Actuator can also be one-way movement cylinder, by unidirectional in addition to for reciprocating cylinder
The inside increase back-moving spring of cylinder is moved, the effect of reciprocating cylinder can be equally reached.Certain actuator can also be electricity
Machine, the output shaft of motor is directly connected by shaft coupling with cutter shaft.
In above-mentioned thread shearing device of sewing machine, described adjustment structure includes the spacing ring being fixed on cutter shaft and is arranged
In the spring on cutter shaft, one end of the spring is resisted against on spacing ring, and its other end is resisted against in blade mounting seat, in spring
The lower described spacing ring of elastic force effect be resisted against on internal axle sleeve, now cutter is tightly engaged with bottom knife.
When the piston rod stretching or retraction of cylinder, axial movement is generated, then inherently drive internal axle sleeve rotation, together
When internal axle sleeve be possible to that slight axial movement can be produced in the axial direction, but under the action of the spring, drive cutter shaft light axial
Motion is so that internal axle sleeve reset, is always ensured that cutter is tightly engaged with bottom knife.
In above-mentioned thread shearing device of sewing machine, there is annular groove on described cutter shaft, described spacing ring is connected to this
In annular groove, the sidepiece of the spacing ring has opening.
Spacing ring is a split ring, with certain elasticity, and the size of opening is less than the external diameter of cutter shaft, it is ensured that spacing ring card
It will not fall off after being connected in annular groove.Spacing ring is split ring, conveniently can be connected in stopper slot, installation and removal side
Just.
In the present apparatus, the angle that cutter is rotated is by the linear motion distance of outer shaft and the helical orbit one of internal axle sleeve
Pitch co- controlling, the direction of rotation of helical orbit one of internal axle sleeve and the direction of motion co- controlling cutter of cylinder piston rod
Direction of rotation.Its operation principle is as follows：When cylinder is ventilated, piston rod moves linearly, and is existed by the spacer pin one in outer shaft
Moved in the helical orbit one of internal axle sleeve, the rectilinear movement of piston rod is changed into the rotation of cutter shaft, the pendulum of cutter is controlled
Move and coordinate bottom knife formation trimming action.The import and export of cylinder are exchanged, piston rod reverse linear motion, cutter shaft is reversely rotated,
Reset cutter, trimming action is completed.
Compared with prior art, this thread shearing device of sewing machine has advantages below：
Actuator is coaxially disposed with cutter shaft, makes overall structure compacter, is occupied little space, seam platform upper right is completely disposed at
Side, the aesthetic property for not influenceing sewing machine overall；By the helical orbit one on internal axle sleeve and spacing on outer shaft
Pin one realizes the transmission of power, linear motion is changed into rotate, transmission stability is good, precision is higher, more previous connecting rod is passed
Dynamic is even more to greatly save space-consuming；And its is easy for installation, cost is low.
Brief description of the drawings
Fig. 1 is the part-structure schematic diagram for the embodiment one that the present invention is provided.
Fig. 2 is the sectional view for the embodiment one that the present invention is provided.
Fig. 3 is the structural representation of linkage unit in the embodiment one that the present invention is provided.
Fig. 4 is the structural representation of internal axle sleeve in the embodiment one that the present invention is provided.
Fig. 5 is the mated condition schematic diagram of cutter shaft and internal axle sleeve in embodiment one.
Fig. 6 is the sectional view for the embodiment two that the present invention is provided.
Fig. 7 is the mated condition schematic diagram of outer shaft and internal axle sleeve in embodiment two.
In figure, 1, fixed seat；2nd, blade mounting seat；3rd, bottom knife；4th, cutter shaft；5th, cutter；6th, actuator；7th, outer shaft
Set；8th, internal axle sleeve；9th, helical orbit one；10th, spacer pin one；11st, spacing plane；12nd, positioning hole；13rd, spacing ring；14th, spring；
15th, annular groove；16th, locking nut；17th, support base；18th, helical orbit two；19th, spacer pin two.
Embodiment
The following is specific embodiment of the invention and with reference to accompanying drawing, technical scheme is further described,
But the present invention is not limited to these embodiments.
Embodiment one
Thread shearing device of sewing machine as shown in Figure 1, including fixed seat 1, the side of fixed seat 1 have blade mounting seat 2, knife
The end of piece mounting seat 2 is fixed with the support for being additionally provided with and extending along the length direction of fixed seat 1 in bottom knife 3, blade mounting seat 2
The cutter shaft 4 that can be rotated along own central axis line with supported hole precision-fit is equipped with hole, supported hole, one end of cutter shaft 4 is fixed
There is the cutter 5 for engaging and setting with bottom knife 3.
It is used to drive the actuator 6 that cutter shaft 4 is rotated along own central axis line, the driving as shown in figure 1, fixed seat 1 is provided with
Part 6 is coaxially disposed with cutter shaft 4 and is connected by drive mechanism with cutter shaft 4, and being provided between cutter shaft 4 and blade mounting seat 2 is used to begin
The adjustment structure for making cutter 5 be tightly engaged with bottom knife 3 eventually.
Drive mechanism includes outer shaft 7 and the internal axle sleeve 8 being equipped with outer shaft 7 being arranged in outer shaft 7, this reality
Apply in example, as shown in Figures 2 and 3, the linkage unit driving internal axle sleeve 8 when outer shaft 7 is being axially moved in the presence of actuator 6
Rotated along own central axis line.
As shown in Fig. 2 the output shaft of outer shaft 7 and actuator 6 is coaxially connected, cutter shaft 4 be located in internal axle sleeve 8 and with it is interior
The coaxial cooperation of axle sleeve 8 is set, and provided with circumferential position limiting structure between cutter shaft 4 and internal axle sleeve 8, linkage unit is located at including at least one
Helical orbit 1 on internal axle sleeve 8 and its inner spacer pin one being slidably matched with helical orbit 1 on outer shaft 7
10, the quantity of spacer pin 1 is equal with the quantity of helical orbit 1 and spacer pin 1 is corresponded with helical orbit 1 and set
Put.
Cross section of the helical orbit 1 along internal axle sleeve 8 radially is curved, in order to ensure that the inner of spacer pin 1 can be accurate
Really coordinate and can well be slided in helical orbit 1, the inner of spacer pin 1 is in spherical.Spacer pin 1 for convenience
Install, radial screw bore is opened up on outer shaft 7, spacer pin 1 is fixed in radial screw bore by way of screw thread, its
The inner be able to will well be slided in helical orbit 1.
Wherein, helical orbit 1 is 1-6.
In the present embodiment, as shown in figure 4, helical orbit 1 is 2, and it is symmetrical along the axis of internal axle sleeve 8, protect
Stationarity during card linkage between internal axle sleeve 8 and outer shaft 7, improves transmission accuracy, so as to ensure the running accuracy of internal axle sleeve 8.
In the present embodiment, the pitch of helical orbit 1 is 10-100mm, so sets to prevent spacer pin 1 with interior axle
Locking phenomenon occurs for set 8.
As shown in figure 5, circumferential position limiting structure include spacing plane 11 on cutter shaft 4 and on internal axle sleeve 8 with
Spacing plane 11 reclines the limited post of setting, and internal axle sleeve 8 is provided with positioning hole 12, and limited post is located in positioning hole 12.
Limited post can be directly anchored in positioning hole 12 by way of screw thread, and the inner patch of limited post is required after fixing
Lean against in spacing plane 11, its outer end can not protrude the outer surface of internal axle sleeve 8, prevent from interfering with outer shaft 7.
In the present embodiment, as depicted in figs. 1 and 2, actuator 6 is cylinder, as shown in Fig. 2 cylinder piston rod stretches out cylinder body
Part on there is external screw thread, the internal thread hole that there is on outer shaft 7 piston rod with cylinder to be coaxially disposed, the piston rod of cylinder
In the internal thread hole for being threaded in outer shaft 7.
Specifically, as shown in Fig. 2 outer shaft 7 in tubbiness and has bottom close to one end of cylinder, wherein, internal thread hole
It is opened in the center of bottom.To improve the connective stability of outer shaft 7 and cylinder piston rod, as shown in Fig. 2 in cylinder
The locking nut 16 being resisted against on outer shaft 7 is threaded with piston rod, to ensure that outer shaft 7 and cylinder piston rod do not turn
It is dynamic.
In the present embodiment, the piston rod of cylinder can not be circumferentially rotated along own axes, and its piston rod is located in cylinder body
The cross section of portion part is in polygon, it is ensured that piston rod is not rotated in cylinder body.Support base 17, support are provided with fixed seat 1
There is the mounting hole coaxial with cutter shaft 4, cylinder coaxial is fixed in the mounting hole on seat 17.
As shown in Fig. 2 adjustment structure includes the spacing ring 13 being fixed on cutter shaft 4 and the spring 14 being sheathed on cutter shaft 4,
One end of spring 14 is resisted against on spacing ring 13, and its other end is resisted against in blade mounting seat 2, under the elastic force effect of spring 14
Spacing ring 13 is resisted against on internal axle sleeve 8, and now cutter 5 is tightly engaged with bottom knife 3.
When the piston rod stretching or retraction of cylinder, axial movement is generated, then inherently drive internal axle sleeve 8 to rotate,
Internal axle sleeve 8 is possible to that slight axial movement can be produced in the axial direction simultaneously, but under action from the spring 14, driving cutter shaft 4 is light
It is micro- to be axially moved so that internal axle sleeve 8 resets, it is always ensured that cutter 5 is tightly engaged with bottom knife 3.
Specifically, as shown in figure 5, there is annular groove 15, spacing ring 13 is connected in the annular groove 15, spacing on cutter shaft 4
The sidepiece of ring 13 has opening.Spacing ring 13 is a split ring, with certain elasticity, and the size of opening is less than the outer of cutter shaft 4
Footpath, it is ensured that spacing ring 13 will not fall off after snapping fit onto in annular groove 15.Spacing ring 13 is split ring, can conveniently be connected to limit
In the groove of position, installation and removal are convenient.
In the present apparatus, the angle that cutter 5 is rotated is by the linear motion distance of outer shaft 7 and the spiral track of internal axle sleeve 8
The pitch co- controlling of road 1, the direction of rotation of helical orbit 1 of internal axle sleeve 8 and the direction of motion co- controlling of cylinder piston rod
The direction of rotation of cutter 5.Its operation principle is as follows：When cylinder is ventilated, piston rod moves linearly, by outer shaft 7
Spacer pin 1 is moved in the helical orbit 1 of internal axle sleeve 8, and the rectilinear movement of piston rod is changed into the rotation of cutter shaft 4, is carried out
Control the swing of cutter 5 and coordinate the formation trimming action of bottom knife 3.Exchange the import and export of cylinder, piston rod reverse linear fortune
Dynamic, cutter shaft 4 is reversely rotated, and resets cutter 5, and trimming action is completed.
Actuator 6 is coaxially disposed by this thread shearing device of sewing machine with cutter shaft 4, makes overall structure compacter, space-consuming
It is small, it is completely disposed at sewing machine seam platform upper right side, the aesthetic property for not influenceing sewing machine overall；Pass through the spiral on internal axle sleeve 8
Track 1 and spacer pin 1 on outer shaft 7 realize the transmission of power, linear motion are changed into rotate, transmission is flat
Stability is good, precision is higher, and more previous link transmission is even more to greatly save space-consuming；And its is easy for installation, cost is low.
Embodiment two
The structural principle of the structural principle be the same as Example one of the present embodiment is essentially identical, and different places are, such as Fig. 6 and
Shown in 7, internal axle sleeve 8 is connected with the piston rod of actuator 6, and outer shaft 7 is connected with cutter shaft 4, when internal axle sleeve 8 is in the work of actuator 6
During with lower axial movement, driving outer shaft 7 is circumferentially rotated.
As shown in fig. 7, outer shaft 7 is provided with least one helical orbit 2 18, internal axle sleeve 8 is provided with its outer end and spiral
The spacer pin 2 19 that track 2 18 is slidably matched, the quantity of spacer pin 2 19 is equal with the quantity of helical orbit 2 18 and spacer pin
2 19 correspond setting with helical orbit 2 18.
In order to ensure the inner energy accurate fit of spacer pin 2 19 and can well be slided in helical orbit 2 18, spacer pin
2 19 outer end is in spherical.The installation of spacer pin 2 19 for convenience, opens up radial screw bore, spacer pin two on internal axle sleeve 8
19 are fixed in radial screw bore by way of screw thread, and its outer end be able to will well be slided in helical orbit 2 18.
In the present embodiment, as shown in fig. 7, helical orbit 2 18 is 2 and is uniformly distributed.
Embodiment three
The structural principle of the structural principle be the same as Example one of the present embodiment is essentially identical, and different places are, spiral track
Road 1 is 3 and circular array is distributed, it is ensured that stationarity during linkage between internal axle sleeve 8 and outer shaft 7, improves transmission essence
Degree.
Example IV
The structural principle of the structural principle be the same as Example one of the present embodiment is essentially identical, and different places are, actuator 6
The power source being axially movable for hydraulic cylinder, push-pull electromagnet or other output shafts.
Embodiment five
The structural principle of the structural principle be the same as Example one of the present embodiment is essentially identical, and different places are, actuator 6
Directly it is connected for the output shaft of motor by shaft coupling with cutter shaft 4.
Embodiment six
The structural principle of the structural principle be the same as Example one of the present embodiment is essentially identical, and different places are, actuator 6
For one-way movement cylinder, by increasing back-moving spring in the inside of one-way movement cylinder, reciprocating cylinder can be equally reached
Effect.
Embodiment seven
The structural principle of the structural principle be the same as Example one of the present embodiment is essentially identical, and different places are, actuator 6
Rotary cylinder is can also be, now needs to limit the radial rotating of outer shaft 7.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
Claims (10)
1. a kind of thread shearing device of sewing machine, including fixed seat (1), the side of the fixed seat (1) have blade mounting seat (2),
The end of the blade mounting seat (2), which is fixed with bottom knife (3), blade mounting seat (2), to be additionally provided with along fixed seat (1) length side
To the supported hole of extension, the cutter shaft that can be rotated along own central axis line with supported hole precision-fit is equipped with described supported hole
(4), one end of the cutter shaft (4) is fixed with the cutter (5) for engaging and setting with bottom knife (3), it is characterised in that described consolidates
Reservation (1), which is provided with, to be used to drive the actuator (6) that cutter shaft (4) is rotated along own central axis line, the actuator (6) and cutter shaft (4)
It is coaxially disposed and is connected by drive mechanism with cutter shaft (4), being provided between described cutter shaft (4) and blade mounting seat (2) is used for
All the time the adjustment structure for making cutter (5) be tightly engaged with bottom knife (3).
2. thread shearing device of sewing machine according to claim 1, it is characterised in that described drive mechanism includes outer shaft
And the internal axle sleeve (8) being equipped with outer shaft (7) that is arranged in outer shaft (7), described outer shaft (7) and interior axle (7)
Being provided between set (8) when outer shaft (7)/internal axle sleeve (8) is being axially moved in the presence of actuator (6) is used to drive internal axle sleeve
(8) linkage unit that/outer shaft (7) is rotated along own central axis line.
3. thread shearing device of sewing machine according to claim 2, it is characterised in that described outer shaft (7) and actuator (6)
Output shaft be coaxially connected, described cutter shaft (4) is located in internal axle sleeve (8) and set with internal axle sleeve (8) coaxial cooperation, described
Cutter shaft (4) and internal axle sleeve (8) between provided with circumferential position limiting structure, described linkage unit includes at least one and is located at internal axle sleeve
(8) helical orbit one (9) on and its inner spacer pin being slidably matched with helical orbit one (9) on outer shaft (7)
One (10), the quantity of the spacer pin one (10) is equal with the quantity of helical orbit one (9) and spacer pin one (10) and spiral track
Road one (9), which is corresponded, to be set.
4. thread shearing device of sewing machine according to claim 2, it is characterised in that described internal axle sleeve (8) and actuator (6)
Output shaft be coaxially connected, described cutter shaft (4) is coaxially located in outer shaft (7) and cutter shaft (4) and outer shaft (7) are circumferentially solid
Fixed, described linkage unit includes at least one helical orbit two (18) on outer shaft (7) and on internal axle sleeve (8)
Its inner spacer pin two (19) being slidably matched with helical orbit two (18), the quantity and spiral track of the spacer pin two (19)
The quantity in road two (18) is equal and spacer pin two (19) is corresponded with helical orbit two (18) and set.
5. thread shearing device of sewing machine according to claim 3, it is characterised in that described helical orbit one (9) is 1-6
It is individual.
6. thread shearing device of sewing machine according to claim 5, it is characterised in that described helical orbit one (9) is 2.
7. the thread shearing device of sewing machine according to claim 3 or 5 or 6, it is characterised in that described circumferential position limiting structure bag
Include the spacing plane (11) on the cutter shaft (4) and being reclined the spacing of setting with spacing plane (11) on internal axle sleeve (8)
Post, described internal axle sleeve (8) is provided with positioning hole (12), and described limited post is located in positioning hole (12).
8. the thread shearing device of sewing machine according to claim 3 or 5 or 6, it is characterised in that the helical orbit one (9)
Pitch is 10-100mm.
9. the thread shearing device of sewing machine according to Claims 2 or 3 or 4 or 5, it is characterised in that described actuator (6) is
Cylinder, the cylinder piston rod, which is stretched out on the part of cylinder body, has the work having on external screw thread, above-mentioned outer shaft (7) with cylinder
The internal thread hole that stopper rod is coaxially disposed, the piston rod thread of the cylinder is connected in the internal thread hole of outer shaft (7).
10. the thread shearing device of sewing machine according to Claims 2 or 3 or 5 or 6, it is characterised in that described adjustment structure bag
The spring (14) for including the spacing ring (13) being fixed on cutter shaft (4) and being sheathed on cutter shaft (4), one end of the spring (14) is supported
Lean against on spacing ring (13), its other end is resisted against in blade mounting seat (2), the described limit under the elastic force effect of spring (14)
Position ring (13) is resisted against on internal axle sleeve (8), and now cutter (5) is tightly engaged with bottom knife (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611205865.7A CN107059269B (en) | 2016-12-23 | 2016-12-23 | Thread cutting device of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611205865.7A CN107059269B (en) | 2016-12-23 | 2016-12-23 | Thread cutting device of sewing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107059269A true CN107059269A (en) | 2017-08-18 |
| CN107059269B CN107059269B (en) | 2020-06-09 |
Family
ID=59623204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611205865.7A Active CN107059269B (en) | 2016-12-23 | 2016-12-23 | Thread cutting device of sewing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107059269B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110938947A (en) * | 2019-12-20 | 2020-03-31 | 浙江宝宇缝纫机股份有限公司 | Transmission shaft supporting structure of sewing machine |
| CN113396714A (en) * | 2021-05-28 | 2021-09-17 | 浙江亚特电器有限公司 | Blade of pruning tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN87212542U (en) * | 1987-12-03 | 1988-09-07 | 上海针织机械三厂 | Mechnical semi-automatic thread cutting machine |
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| CN105889340A (en) * | 2015-01-13 | 2016-08-24 | 石河子大学 | Rotary unloading mechanism between boxes |
| CN205636087U (en) * | 2016-05-23 | 2016-10-12 | 温州市亨泰缝制设备有限公司 | Automatic manual dual -purpose thread trimmer devices |
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| CN102116308A (en) * | 2011-04-13 | 2011-07-06 | 襄樊五二五泵业有限公司 | Adjustable mechanical sealing structure for pump |
| CN204000211U (en) * | 2014-06-06 | 2014-12-10 | 拓卡奔马机电科技有限公司 | Knife structure in a kind of muti needle chainstitch m/c |
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| CN204875126U (en) * | 2015-08-22 | 2015-12-16 | 台州市三本缝制设备有限公司 | Automatic trimming top cop latch device of sewing machine circular knife |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110938947A (en) * | 2019-12-20 | 2020-03-31 | 浙江宝宇缝纫机股份有限公司 | Transmission shaft supporting structure of sewing machine |
| CN110938947B (en) * | 2019-12-20 | 2021-11-02 | 浙江宝宇缝纫机股份有限公司 | Transmission shaft supporting structure of sewing machine |
| CN113396714A (en) * | 2021-05-28 | 2021-09-17 | 浙江亚特电器有限公司 | Blade of pruning tool |
| CN113396714B (en) * | 2021-05-28 | 2023-10-20 | 浙江亚特电器股份有限公司 | Blade of pruning tool |
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| CN107059269B (en) | 2020-06-09 |
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Address after: 318014 No. 1008, east section of Donghai Avenue, Sanjia, Jiaojiang District, Taizhou City, Zhejiang Province Patentee after: Jack Technology Co.,Ltd. Address before: 318010 No. 15 Airport South Road, Jiaojiang District, Zhejiang, Taizhou Patentee before: JACK SEWING MACHINE Co.,Ltd. |