CN207391736U - A kind of thread cutting mechanism of double-crank driving - Google Patents
A kind of thread cutting mechanism of double-crank driving Download PDFInfo
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- CN207391736U CN207391736U CN201720736812.1U CN201720736812U CN207391736U CN 207391736 U CN207391736 U CN 207391736U CN 201720736812 U CN201720736812 U CN 201720736812U CN 207391736 U CN207391736 U CN 207391736U
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Abstract
The utility model is related to stitching process fields, and in particular to a kind of thread cutting mechanism of double-crank driving.The technical solution of the utility model includes rotary shuttle shaft, trimming cam, trimming cam crank component, trimming crank axle, active knife assembly, secondary moving knife component and engine oil pump shaft sleeve, the rotary shuttle shaft is fixedly arranged on trimming cam, one end of rotary shuttle shaft is sheathed in engine oil pump shaft sleeve, on the excircle for the miner diameter end that the secondary knife rest of the main carriage of active knife assembly and time moving knife component is sheathed on engine oil pump shaft sleeve successively, on the excircle for the miner diameter end that the secondary knife crank of the operator crank of the active knife assembly and time moving knife component is arranged in trimming crank axle successively, the notch of the trimming crank axle other end is connected with trimming cam crank component, operator component is with time knife assembly simultaneously by trimming crankshaft drives, realize trimming action.The utility model is in sewing, and structural behaviour is stablized, and double-pole institutional adjustment is mutual indepedent, does not interfere with each other, and facilitates adjustment and repair.
Description
Technical field
The utility model is related to stitching process fields, and in particular to a kind of thread cutting mechanism of double-crank driving.
Background technology
The thread cutting mechanism of conventional sewing machine is the mechanism of moving knife and stationary knife cooperation trimming at present, and drawback is located at for trimming point
Pin hole position to the right is engaged at stationary knife cutting edge, and sewing remnants the end of a thread is longer after trimming, influences the beauty of sewing, it is necessary to craft
In the process for doing once rejecting the end of a thread；It is time-consuming, take a lot of work.
Utility model content
The utility model is in order to solve the above technical problems, provide a kind of thread cutting mechanism of double-crank driving.
Existing in the prior art to solve the problems, such as, the technical solution of the utility model is：A kind of trimming of double-crank driving
Mechanism, it is characterised in that：Including rotary shuttle shaft, trimming cam, trimming cam crank component, trimming crank axle, active knife assembly, secondary
Knife assembly and engine oil pump shaft sleeve, the rotary shuttle shaft are fixedly arranged on trimming cam, and one end of rotary shuttle shaft is sheathed in engine oil pump shaft sleeve, actively
On the excircle for the miner diameter end that the secondary knife rest of the main carriage of knife assembly and time knife assembly is sheathed on engine oil pump shaft sleeve successively, the active
On the excircle for the miner diameter end that the secondary knife crank of the operator crank of knife assembly and time knife assembly is arranged in trimming crank axle successively, cut
The notch of the line crank axle other end is connected with trimming cam crank component, and active knife assembly is with time knife assembly simultaneously by trimming crank
Axis drives, and realizes trimming action.
The structure of the active knife assembly includes operator crank, operator connecting rod, main carriage and driving knife, the operator
The bottom of crank is " C " type structure, and there are two parallel ear, two parallel ears for the openend setting of " C " type structure
Piece connected by screw one, centre is irregular body, and top is provided with nut, the structure of the main carriage include an annulus and
" L " type of a connecting piece composition, is provided with dome on the annulus, is provided with screw hole on dome, in the connection sheet
It sets there are two connecting hole, the screw hole on the dome of the main carriage is with operating connecting rod and nut is connected by axial screw one
It connects, operator connecting rod and operator crank are connected together by axial screw two and nut, and main carriage passes through blade screw one and master
Moving knife connects.
The secondary knife assembly includes time knife crank, secondary knife connecting rod, secondary knife rest and secondary moving knife, and the secondary knife crank is one
The rectangular block of side fluting, is provided with screw hole on rectangular block, through hole, the secondary knife connecting rod is provided on the both sides rectangular block of slot
For stepped ramp type, social son has connecting hole respectively at both ends, and the secondary knife rest includes " L " type that an annulus and a connecting piece form,
Dome is provided on the annulus, screw hole is provided on dome, is set in the connection sheet there are two connecting hole, it is secondary dynamic
Knife is connected by positioning screw and blade screw with two connecting holes in the connection sheet of time knife rest, and secondary knife connecting rod one end passes through axis
Position screw three is connected with the dome screw hole on time knife rest annulus, and the other end is connected by pin with time knife crank.
Compared with prior art, it is as follows the advantages of the utility model：
1st, the utility model expands tangent point controlled range, and tangent point can be controlled in the right position immediately below eedle,
Double-pole crank structure is each unfettered, and tangent point can be adjusted flexibly, and controls sewing remnants stubs after trimming, ensures trimming
Eedle stub is shorter afterwards, controls Bird's Nest size.
2nd, the utility model is in sewing, and structural behaviour is stablized, and double-pole institutional adjustment is mutual indepedent, does not interfere with each other, convenient
Adjustment and repair.
3rd, the utility model structure can control the meshing point of trimming immediately below pin hole, and sewing remnants the end of a thread becomes after making trimming
Short about 3mm saves the process for rejecting the end of a thread, time saving, saving of labor.
Description of the drawings
Fig. 1 is the assembling schematic diagram of the utility model；
Fig. 2 is the structure diagram of the utility model；
Fig. 3 assembles splitted construction schematic diagram for the utility model；
Fig. 4 is the utility model main carriage component structure diagram；
Fig. 5 is the utility model time knife assembly structure diagram；
Fig. 6 is conventional types thread cutting mechanism schematic diagram；
Fig. 7 is double-crank thread cutting mechanism schematic diagram.
In figure：Reference sign：1-rotary shuttle shaft, 2-trimming cam, 3-trimming cam crank component, 4-trimming are bent
Arbor, 5-active knife assembly, 5-1-screw one, 5-2 operator cranks, 5-3 operator connecting rods, 5-4 axial screws one, 5-5 operators
Frame, 5-6 driving knifes, 5-7 blade screws one, 5-8 axial screws two, 5-9 nuts, 6-secondary knife assembly, 6-1 screws two, 6-2 times
Knife crank, 6-3 pins, 6-4 knife connecting rod, 6-5 axial screws three, 6-6 knife rest, 6-7 moving knife, 6-8 blade screws two, 6-
9 positioning screws, 7- engine oil pump shaft sleeves.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, is further elaborated the utility model.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Referring to Fig. 1-Fig. 3：It is convex including rotary shuttle shaft 1, trimming the present embodiment provides a kind of thread cutting mechanism of double-crank driving
Wheel 2, trimming cam crank component 3, trimming crank axle 4, active knife assembly 5, secondary knife assembly 6 and engine oil pump shaft sleeve 7.
Referring to Fig. 4：The structure of the active knife assembly 5 includes operator crank 5-2, operator connecting rod 5-3, main carriage 5-5
With driving knife 5-6, the bottom of the operator crank 5-2 is " C " type structure, and there are two phases for the openend setting of " C " type structure
Parallel ear, two parallel ears are irregular body by one 5-1 connections of screw, centre, and top is provided with nut 5-
The structure of 9, the main carriage 5-5 include " L " type that an annulus and a connecting piece form, and are provided on the annulus convex
Circle is provided with screw hole on dome, is set in the connection sheet there are two connecting hole, on the dome of the main carriage 5-5
Screw hole be connected with operator connecting rod 5-3 and nut 5-9 by one 5-4 of axial screw, operator connecting rod 5-3 and the crank 5-2 of operating
It is connected together by axial screw two 5-8 and nut 5-9, main carriage 5-5 is connected by one 5-7 of blade screw and driving knife 5-6
It connects.
Referring to Fig. 5：The secondary knife assembly 6 includes time knife crank 6-2, secondary knife connecting rod 6-4, secondary knife rest 6-6 and secondary moving knife
6-7, the secondary knife crank 6-2 are the rectangular block of one side fluting, are provided with screw hole on rectangular block, on the both sides rectangular block of slot
Through hole is provided with, the secondary knife connecting rod 6-4 is stepped ramp type, and social son has connecting hole, the secondary knife rest 6-6 bags respectively at both ends
" L " type of an annulus and a connecting piece composition is included, dome is provided on the annulus, screw hole is provided on dome, it is described
Connection sheet on set there are two connecting hole, secondary moving knife 6-7 passes through positioning screw and blade screw and time connection sheet of knife rest 6-6
On the connection of two connecting holes, secondary knife connecting rod 6-4 one end passes through three 6-5 of axial screw and the dome spiral shell on time knife rest 6-6 annulus
Nail hole connects, and the other end is connected by pin 6-3 with time knife crank 6-2.
Referring to Fig. 6：For conventional types cutter mechanism, tangent point 9 is located at 8 position to the right of pin hole center.
Referring to Fig. 7：The utility model expands tangent point controlled range, and tangent point 9 can be controlled in the left side immediately below eedle
Right position, double-pole crank structure is each unfettered, and tangent point can be adjusted flexibly, and controls sewing remnants stubs after trimming,
Eedle stub is shorter after ensureing trimming, controls Bird's Nest size.
The utility model rotary shuttle shaft 1 is fixedly arranged on trimming cam 2, and one end of rotary shuttle shaft is sheathed in engine oil pump shaft sleeve 7, driving knife
The annulus of the annulus of 5 main carriage 5-5 of component and time No. 6 knife rest 6-6 of knife assembly are sheathed on the outer of the miner diameter end of engine oil pump shaft sleeve 7 successively
On circumference, active knife assembly 5 is driven with time knife assembly 6 by trimming crank axle 4 simultaneously, the operator crank of the active knife assembly 5
On the excircle for the miner diameter end that the secondary knife crank 6-2 of 5-2 and time knife assembly 6 is arranged in trimming crank axle 4 successively, trimming crank axle
The notch of 4 other ends is connected with trimming cam crank component 3, and active knife assembly 5 is with time knife assembly 6 simultaneously by trimming crank axle 4
Trimming action is realized in driving.
The course of work of the utility model：Rotary shuttle shaft 1 rotates, and drives trimming cam 2, driving trimming cam crank component 3
Coordinate with the curved surface of trimming cam 2, trimming cam crank component 3 is made to turn an angle, trimming cam crank component 3 and trimming
Crank axle 4 coordinates, and also turns an angle simultaneously, and by unclamping screw 5-1, adjustment trimming crank axle 4 just makes position, is adjusted
The rotational angle of operator crank 5-2, so as to just have adjusted the final position of driving knife 5-6, because of operator crank 5-2 and time knife crank
6-2 is also secured on trimming crank axle 4, so operator crank 5-2 is identical with time rotational angle of knife crank 6-2, adjustment time
The initial position of knife crank 6-2 can control time final position of moving knife 6-6.
The final position mutual with secondary moving knife 6-7 by adjusting driving knife 5-6, can customize mounted in tangential engagement point.
The above is only the preferred embodiment of the utility model, is not intended to limit the protection of the utility model
Scope.
Claims (3)
1. a kind of thread cutting mechanism of double-crank driving, it is characterised in that：Including rotary shuttle shaft（1）, trimming cam（2）, trimming cam
Crank assemblies（3）, trimming crank axle（4）, active knife assembly（5）, secondary knife assembly（6）And engine oil pump shaft sleeve（7）, the rotary shuttle shaft
（1）It is fixedly arranged on trimming cam（2）, one end of rotary shuttle shaft is sheathed on engine oil pump shaft sleeve（7）It is interior, active knife assembly（5）Main carriage（5-
5）With secondary knife assembly（6）Secondary knife rest（6-6）Engine oil pump shaft sleeve is sheathed on successively（7）Miner diameter end excircle on, the active
Knife assembly（5）Operator crank（5-2）With secondary knife assembly（6）Secondary knife crank（6-2）Trimming crank axle is arranged in successively（4）'s
On the excircle of miner diameter end, trimming crank axle（4）The notch of the other end and trimming cam crank component（3）Connection, driving knife group
Part（5）With secondary knife assembly（6）Simultaneously by trimming crank axle（4）Trimming action is realized in driving.
2. a kind of thread cutting mechanism of double-crank driving according to claim 1, it is characterised in that：The active knife assembly
（5）Structure include operator crank（5-2）, operator connecting rod（5-3）, main carriage（5-5）And driving knife（5-6）, the operator
Crank（5-2）Bottom for " C " type structure, the openend of " C " type structure is set there are two parallel ear, and two are parallel
Ear pass through screw one（5-1）Connection, centre are irregular body, and top is provided with nut（5-9）, the main carriage（5-
5）Structure include " L " type that an annulus and a connecting piece form, be provided with dome on the annulus, spiral shell be provided on dome
Nail hole, sets that there are two connecting hole, the main carriages in the connection sheet（5-5）Dome on screw hole with operator connect
Bar（5-3）And nut（5-9）Pass through axial screw one（5-4）Connection, connecting rod of operating（5-3）With operator crank（5-2）Pass through axis
Position screw two（5-8）And nut（5-9）It is connected together, main carriage（5-5）Pass through blade screw one（5-7）With driving knife（5-
6）Connection.
3. a kind of thread cutting mechanism of double-crank driving according to claim 1 or 2, it is characterised in that：The secondary knife group
Part（6）Including secondary knife crank（6-2）, secondary knife connecting rod（6-4）, secondary knife rest（6-6）With secondary moving knife（6-7）, the secondary knife crank
（6-2）For the rectangular block of one side fluting, screw hole is provided on rectangular block, through hole is provided on the both sides rectangular block of slot, it is described
Secondary knife connecting rod（6-4）For stepped ramp type, social son has connecting hole, the secondary knife rest respectively at both ends（6-6）Including an annulus and
" L " type of a connecting piece composition, is provided with dome on the annulus, is provided with screw hole on dome, in the connection sheet
Connecting hole there are two setting, secondary moving knife（6-7）Pass through positioning screw and blade screw and time knife rest（6-6）Connection sheet on two
A connecting hole connection, secondary knife connecting rod（6-4）One end passes through axial screw three（6-5）With secondary knife rest（6-6）Dome spiral shell on annulus
Nail hole connects, and the other end passes through pin（6-3）With secondary knife crank（6-2）Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720736812.1U CN207391736U (en) | 2017-06-23 | 2017-06-23 | A kind of thread cutting mechanism of double-crank driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720736812.1U CN207391736U (en) | 2017-06-23 | 2017-06-23 | A kind of thread cutting mechanism of double-crank driving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207391736U true CN207391736U (en) | 2018-05-22 |
Family
ID=62402443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720736812.1U Active CN207391736U (en) | 2017-06-23 | 2017-06-23 | A kind of thread cutting mechanism of double-crank driving |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207391736U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119394A (en) * | 2017-06-23 | 2017-09-01 | 西安标准工业股份有限公司 | The thread cutting mechanism of double-crank driving |
| CN109005985A (en) * | 2018-07-16 | 2018-12-18 | 浙江理工大学 | A kind of nonirrigated farmland nursery stock grafting machine |
| CN116497532A (en) * | 2023-06-28 | 2023-07-28 | 江苏长海消防装备有限公司 | Sewing machine thread cutting mechanism for processing firefighting gloves |
-
2017
- 2017-06-23 CN CN201720736812.1U patent/CN207391736U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107119394A (en) * | 2017-06-23 | 2017-09-01 | 西安标准工业股份有限公司 | The thread cutting mechanism of double-crank driving |
| CN109005985A (en) * | 2018-07-16 | 2018-12-18 | 浙江理工大学 | A kind of nonirrigated farmland nursery stock grafting machine |
| CN116497532A (en) * | 2023-06-28 | 2023-07-28 | 江苏长海消防装备有限公司 | Sewing machine thread cutting mechanism for processing firefighting gloves |
| CN116497532B (en) * | 2023-06-28 | 2023-08-29 | 江苏长海消防装备有限公司 | Sewing machine thread cutting mechanism for processing firefighting gloves |
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