CN212247443U - Wire clamping device - Google Patents
Wire clamping device Download PDFInfo
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- CN212247443U CN212247443U CN202020211342.9U CN202020211342U CN212247443U CN 212247443 U CN212247443 U CN 212247443U CN 202020211342 U CN202020211342 U CN 202020211342U CN 212247443 U CN212247443 U CN 212247443U
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- wire clamping
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- telescopic rod
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Abstract
The utility model discloses a thread clamping device, which comprises a fixed sleeve arranged on a sewing machine head, wherein a telescopic rod which is controlled by a driving device and can move axially is arranged inside the fixed sleeve, and the outer wall of the fixed sleeve is provided with a transmission rack which moves in parallel and reversely with the telescopic rod; the part of the telescopic rod, which is positioned in the fixed sleeve, is provided with a first rack part, the inner wall of the transmission rack is provided with a second rack part, and a gear matched with the first rack part and the second rack part is arranged in the fixed sleeve; the telescopic rod is sleeved with a first wire clamping sheet, a second wire clamping sheet and an elastic piece, wherein the first wire clamping sheet, the second wire clamping sheet and the elastic piece are used for controlling the tension of a wire; the transmission rack is abutted against the back side of the first wire clamping sheet; the telescopic rod is provided with a driving part for driving the second wire clamping piece, the driving part is abutted against the wire clamping side of the second wire clamping piece, and the elastic piece is abutted against the back side of the second wire clamping piece.
Description
Technical Field
The utility model belongs to the technical field of industrial sewing machine and specifically relates to a thread trapper for industrial sewing machine.
Background
The invention patent No. 201711488330.X discloses a thread clamping device capable of automatically adjusting the tension of an upper thread, wherein a driving disc is controlled by a linear pulse motor to drive a second thread clamping disc to be close to a first thread clamping disc so as to improve the tension of the upper thread, an elastic body is arranged on the back surface of the first thread clamping disc or the back surface of the second thread clamping disc, and the elastic body is compressed by the elastic body and then has the elastic force of returning to the original position so as to realize the control of the magnitude of the clamping force.
In the technical scheme disclosed in the patent, the thread clamping device is only provided with a movable thread clamping disc and a fixed thread clamping disc, the thread clamping device is realized by the cooperation of the movable thread clamping disc and the fixed thread clamping disc, and the thread clamping disc which can be moved is controlled by the linear pulse motor to be matched with the fixed clamping disc to realize the tension control of the upper thread. The thread tension control of the industrial sewing machine directly influences the stitch sewing quality, and the thread clamping device needs to control the clamping force of the two thread clamping discs in real time according to the working state of a sewing machine needle. However, the moving stroke of a single wire clamping disc is long, so that the wire clamping control response is slow, the control reaction time of the wire tension is still to be improved, the upper limit of the pressure of the elastic piece on the clamping piece is fixed, the pressure and the rigidity of the wire clamping piece cannot be accurately adjusted according to the use requirement, and the application range of the wire clamping device is small.
Disclosure of Invention
The utility model aims to solve the technical problem to provide an improve suture tension control response speed's wire holder to above-mentioned prior art current situation.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a thread clamping device comprises a fixed sleeve arranged on a sewing machine head, wherein a telescopic rod which is controlled by a driving device and can move axially is arranged inside the fixed sleeve, and a transmission rack which moves parallelly and reversely with the telescopic rod is arranged on the outer wall of the fixed sleeve; the part of the telescopic rod, which is positioned in the fixed sleeve, is provided with a first rack part, the inner wall of the transmission rack is provided with a second rack part, and a gear matched with the first rack part and the second rack part is arranged in the fixed sleeve; the telescopic rod is sleeved with a first wire clamping sheet, a second wire clamping sheet and an elastic piece, wherein the first wire clamping sheet, the second wire clamping sheet and the elastic piece are used for controlling the tension of a wire; the transmission rack is abutted against the back side of the first wire clamping sheet; the telescopic rod is provided with a driving part for driving the second wire clamping piece, the driving part is abutted against the wire clamping side of the second wire clamping piece, and the elastic piece is abutted against the back side of the second wire clamping piece.
In order to optimize the technical proposal, the utility model discloses still include following modified technical proposal.
The inside system of above-mentioned fixed cover has the gear mounting groove that holds the gear, and the gear mounting groove is equipped with the gear shaft.
The fixing sleeve is provided with a pin groove for mounting a fixing pin, the pin groove is communicated with the gear mounting groove, and the fixing pin is used as a gear rotating shaft.
The locking piece is installed to foretell telescopic link outer end, and the elastic component is located between second thread tension piece and the locking piece.
The locking piece is a locking nut, the locking nut is in threaded fit with the telescopic rod, and the elastic force of the elastic piece is adjusted by adjusting the installation position of the locking nut.
The driving device is a linear pulse motor, and a driving rod of the linear pulse motor is connected with the telescopic rod.
The driving device is fixed in the mounting hole of the sewing machine head through the mounting seat.
The end part of the fixing sleeve is provided with a cavity for accommodating the wire clamping spring, and one end of the wire clamping spring extends out of the fixing sleeve.
The locking nut is provided with an adjusting scale.
Compared with the prior art, the utility model discloses optimize the trapping mechanism of trapping mechanism, through drive arrangement control telescopic link axial displacement, can drive first trapping mechanism and second trapping mechanism and press from both sides the line or loosen the line in step in opposite directions, improved line tension control's response speed and trapping mechanism efficiency.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic view of the installation structure of the present invention.
Fig. 3 is an exploded schematic view of the present invention.
Fig. 4 is a schematic sectional structure of the present invention.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
Fig. 1 to 4 are schematic structural views of the present invention.
Wherein the reference numerals are: the wire clamping device comprises a first wire clamping piece 1, a fixing sleeve 11, a transmission rack 12, a second rack part 12a, a gear 13, a wire clamping spring 14, a gear mounting groove 131, a fixing pin 15, a second wire clamping piece 2, an elastic piece 21, a locking piece 22, an expansion link 3, a first rack part 31, a driving part 32, a mounting seat 4 and a driving device 5.
Example 1:
as shown in fig. 1-4, the thread tension device of the embodiment includes a first thread clamping piece 1, a second thread clamping piece 2, a telescopic rod 3 and a mounting seat 4 fixed on the sewing machine head, wherein the telescopic rod 3 sequentially penetrates through the first thread clamping piece 1 and the second thread clamping piece 2 from inside to outside, a thread passes between the first thread clamping piece 1 and the second thread clamping piece 2, and tension force of the thread during operation is adjusted by controlling the first thread clamping piece 1 and the second thread clamping piece 2.
One end of the telescopic rod 3 is connected with the output end of the driving device 5 so as to drive the telescopic rod 3 to do linear reciprocating motion along the axial direction, the driving device 5 is fixedly arranged on the mounting seat 4, the driving device 5 is connected into an external power supply when the wire clamp works, power is provided for the telescopic rod 3 to do linear reciprocating motion, and the driving device 5 is preferably a linear motor.
From interior toward coaxial first thread tension subassembly that has set gradually outward on the telescopic link 3, first thread tension piece 1, second thread tension piece 2 and second thread tension subassembly, first thread tension subassembly and second thread tension subassembly are movable mounting respectively on telescopic link 3, first thread tension piece 1 slides and sets up on telescopic link 3 to along telescopic link 3 removal opposite direction linear motion under the promotion of first thread tension subassembly, first thread tension subassembly is by interior one-way promotion first thread tension piece 1 toward the outward movement promptly, second thread tension piece 2 joint is in second thread tension subassembly in order to do syntropy synchronous linear reciprocating motion with telescopic link 3.
First press from both sides line subassembly includes fixed cover 11, driving rack 12, gear 13, presss from both sides line spring 14 and sets up first rack portion 31 on telescopic link 3, sets up a gear mounting groove 131 that holds gear 13 on the fixed cover 11 at least, can be provided with n on the fixed cover 11 and be greater than or equal to 1 gear mounting groove 131, preferably 2 in this embodiment, and two gear mounting grooves 131 symmetry sets up, and gear 13 is installed to gear mounting groove 131 internal rotation. Both sides of the gear 13 protrude out of the gear installation grooves 131, respectively, and are engaged with the first rack part 31 of the telescopic bar 3 and the second rack part 12a of the driving rack 12, respectively. The driving rack 12 is slidably mounted in the mounting groove of the driving rack 12 on the outer wall of the fixed sleeve 11.
When the wire clamping action is carried out, the telescopic rod 3 moves towards the left direction as shown in fig. 4, the gear 13 is driven to rotate through the first rack portion 31 on the telescopic rod 3, the transmission rack 12 moves towards the right direction of fig. 4 under the driving of the gear 13, the telescopic rod 3 drives the transmission rack 12 reversely, and the transmission rack 12 can drive the first wire clamping piece 1 to move towards the right side synchronously when the second wire clamping piece 2 moves towards the left side. The telescopic rod 3 simultaneously controls the first thread clamping piece 1 and the second thread clamping piece 2 to move oppositely to control thread clamping force, so that the response speed of thread clamping force control can be greatly improved, and the thread tension control is more accurate.
The fixing sleeve 11 is further provided with a plug pin groove for installing the fixing pin 15, the plug pin groove is communicated with the gear installation groove 131, the axis of the plug pin groove is aligned with the center of the gear installation groove 131, the gear 13 can use the fixing pin 15 as the axis to enable the gear 13 to rotate in the gear installation groove 131, and the transmission rack 12 is enabled to rotateOpposite to the telescopic rod 3The first wire clamping piece 1 is pushed, the first wire clamping assembly can be flexibly assembled and disassembled due to the arrangement of the fixing pin 15, and convenience in assembly and maintenance is improved.
The second wire clamping assembly comprises an elastic part 21, a locking part 22 and a driving part 32 fixedly arranged on the telescopic rod 3, in the embodiment, the elastic part 21 is preferably a spring, the locking part 22 is preferably a lock nut, a space for accommodating the second wire clamping piece 2 and the spring is formed between the driving part 32 and the lock nut, two ends of the spring respectively abut against the lock nut and the second wire clamping piece 2, and scales are arranged on the lock nut to adjust the installation position of the lock nut according to specific requirements, so that the rigidity of the second wire clamping piece 2 during operation is accurately adjusted, when the installation position of the lock nut is closer inwards, the working stroke of the spring is smaller, and the larger the pressure of the spring on the second wire clamping piece 2 under the same condition is, the larger the rigidity of the second wire clamping piece 2 is. The clamping force of the first thread clamping piece 1 and the second thread clamping piece 2 to the upper thread is increased; when the locking nut is gradually unscrewed outwards, the working stroke of the spring is increased, the pressure of the spring on the second wire clamping piece 2 is reduced under the same condition, the rigidity of the second wire clamping piece 2 is also reduced, and the clamping force between the first wire clamping piece 1 and the second wire clamping piece 2 is reduced. Through the regulation to lock nut locking position, can adjust the rigidity of second trapping mechanism 2, be convenient for the installation and debugging of first trapping mechanism 1 and second trapping mechanism 2.
The adjusting gear on the locking nut can be set to be 0-n gear, the embodiment is preferably 0-4 gear, the locking nut is screwed inwards gradually along with the increase of the gear, the pressure of the corresponding spring on the second clamping plate 2 is increased gradually, the rigidity of the second clamping plate 2 is increased accordingly, and the tension of the facial line clamped by the clamping device is increased gradually.
When the telescopic rod 3 moves towards the left side, the second wire clamping piece 2 and the telescopic rod 32 synchronously move towards the left side under the driving of the second wire clamping assembly, and at the moment, the first wire clamping assembly pushes the first wire clamping piece 1 to slide towards the right side, namely, the first wire clamping piece 1 and the second wire clamping piece 2 synchronously move towards each other by the same stroke. When the telescopic rod 3 moves towards the right side, the second thread clamping piece 2 is driven to move towards the right side synchronously, the first thread clamping assembly slides towards the left side synchronously until the first thread clamping assembly does not abut against the first thread clamping piece 1 any more, namely, the thread clamping force between the first thread clamping piece 1 and the second thread clamping piece 2 is continuously reduced until the thread clamping force disappears, the tension force applied to the facial suture is also gradually reduced until the tension force disappears, and the accurate control of the tension force of the facial suture is realized. Compared with the traditional wire clamping and releasing mode that one wire clamping piece is matched with the fixed wire clamping piece in a moving mode, the wire clamping and releasing device has the advantages that the moving stroke of the single wire clamping piece is shortened, the response speed of wire clamping force control is reduced, and the wire clamping and releasing efficiency is improved.
The working principle is as follows: firstly, a linear motor of the thread clamping device is connected with an external power supply, when the thread clamping device is in an initial state, an axial distance of 2-10 mm is arranged between a first thread clamping piece 1 and a second thread clamping piece 2 so as to allow a facial suture to pass through, a transmission rack 12 is abutted against the first thread clamping piece 1, the force between the transmission rack and the first thread clamping piece 1 is 0, a locking nut is rotated to adjust the first thread clamping piece to a gear required by production work, a spring is matched with a driving part 32 to realize clamping and fixing of the second thread clamping piece 2 and enable the second thread clamping piece to have rigidity required by production, then the linear motor is started to drive a telescopic rod 3 to move inwards, a gear 13 of a first thread clamping component rotates along a rack part on the telescopic rod 3 and drives the transmission rack 12 to move outwards synchronously, the transmission rack 12 pushes the first thread clamping piece 1 to move outwards, meanwhile, the telescopic rod 3 drives the second thread clamping piece 2 clamped by a second clamping component to move inwards, first thread tension piece 1 and the synchronous relative motion of second thread tension piece 2 promptly, the realization is to the gradual clamp of the facial line through the space between the two, and maintain a stable clamping state, the facial line has a stable tensile force this moment, during the pine line, make linear electric motor drive telescopic link 3 outwards move, second thread tension piece 2 outwards synchronous motion under the drive of telescopic link 3, and gear 13 of first thread tension subassembly rotates along with rack portion, drive transmission rack 12 inwards movement, and no longer exert thrust to first thread tension piece 1, the tensile force that the facial line received at this moment reduces gradually to disappearing, accomplish the pine line.
Example 2:
the wire clamping device of this embodiment, the structure is similar in embodiment 1 basically, its difference lies in, evenly set up a plurality of jacks in the one end that drive arrangement 5 was kept away from at telescopic link 3, and set up on locking piece 22 with jack complex through-hole, realize the locking to telescopic link 3 and locking piece 22 through the bolt, and evenly set up the scale gear in the one end that drive arrangement 5 was kept away from at telescopic link 3, gear quantity is unanimous with jack quantity, the jack is preferred 4, in order to realize the regulation to the spring, and then realize the regulation to the 2 tensile forces of second wire clamping piece.
Example 3:
the thread trapper of this embodiment, the structure is similar with embodiment 1 basically, and its difference lies in, and first thread clamping component is provided with the connecting rod mounting groove including fixed cover 11, connecting rod and catch bar on the fixed cover 11 to the connecting rod rotation mounting is in the connecting rod mounting groove, and its both ends stretch out connecting rod mounting groove both sides respectively, and articulate fixedly with telescopic link 3 and catch bar respectively, makes the catch bar can be in a reverse direction to 3 synchronous motion of telescopic link.
Example 4:
as shown in fig. 1, the wire holder of this embodiment has a structure substantially similar to that of embodiment 1, except that a locking member 22 provided with a cavity is used, so that the locking member 22 can have a larger volume and a smaller weight, and the position of the locking member 22 can be easily grasped and adjusted, thereby improving the convenience of adjustment.
Compared with the prior art, the utility model discloses optimize the thread clamping mode of thread clamping device, adopted the working method of two thread clamping pieces synchronous thread clamping or pine, improved line tension control's response speed and work efficiency to can be according to specific user demand, adjust the rigidity of second thread clamping piece 2 through adjusting the second thread clamping assembly to the accurate control of the centre gripping dynamics of second thread clamping piece 2, thereby the tensile force of accurate regulation facial line enlarges the application scope of thread clamping device.
While the preferred embodiments of the present invention have been illustrated, various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention.
Claims (9)
1. The utility model provides a thread trapper, is including installing fixed cover (11) on sewing machine head, characterized by: the inner part of the fixed sleeve (11) is provided with an expansion link (3) which is controlled by a driving device (5) and can move axially, and the outer wall of the fixed sleeve (11) is provided with a transmission rack (12) which moves in parallel and in reverse direction with the expansion link (3); the part of the telescopic rod (3) positioned in the fixed sleeve (11) is provided with a first rack part (31), the inner wall of the transmission rack (12) is provided with a second rack part (12a), and a gear (13) matched with the first rack part (31) and the second rack part (12a) is arranged in the fixed sleeve (11); the telescopic rod (3) is sleeved with a first wire clamping sheet (1), a second wire clamping sheet (2) and an elastic piece (21) which are used for controlling the tension of the wire; the transmission rack (12) is abutted against the back side of the first wire clamping piece (1); the telescopic rod (3) is provided with a driving part (32) for driving the second wire clamping piece (2), the driving part (32) is abutted against the wire clamping side of the second wire clamping piece (2), and the elastic piece (21) is abutted against the back side of the second wire clamping piece (2).
2. The wire gripper of claim 1, wherein: the gear fixing device is characterized in that a gear mounting groove (131) for accommodating a gear (13) is formed in the fixing sleeve (11), and a gear shaft is arranged in the gear mounting groove (131).
3. The wire gripper of claim 2, wherein: the fixed sleeve (11) is provided with a bolt groove for installing the fixed pin (15), the bolt groove is communicated with the gear installation groove (131), and the fixed pin (15) is used as a gear rotating shaft.
4. The wire gripper of claim 3, wherein: the outer end of the telescopic rod (3) is provided with a locking piece (22), and the elastic piece (21) is arranged between the second wire clamping piece (2) and the locking piece (22).
5. The wire gripper of claim 4, wherein: the locking piece (22) is a locking nut, the locking nut is in threaded fit with the telescopic rod (3), and the elastic force of the elastic piece (21) is adjusted by adjusting the installation position of the locking nut.
6. The wire gripper of claim 1, wherein: the driving device (5) is a linear pulse motor, and a driving rod of the linear pulse motor is connected with the telescopic rod (3).
7. The wire gripper of claim 6, wherein: the driving device (5) is fixed in a mounting hole of the sewing machine head through the mounting seat (4).
8. The wire gripper of claim 1, wherein: the end part of the fixed sleeve (11) is provided with a cavity for accommodating the wire clamping spring (14), and one end of the wire clamping spring (14) extends out of the fixed sleeve (11).
9. The wire gripper of claim 5, wherein: the locking nut is provided with an adjusting scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020211342.9U CN212247443U (en) | 2020-02-26 | 2020-02-26 | Wire clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020211342.9U CN212247443U (en) | 2020-02-26 | 2020-02-26 | Wire clamping device |
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| Publication Number | Publication Date |
|---|---|
| CN212247443U true CN212247443U (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020211342.9U Active CN212247443U (en) | 2020-02-26 | 2020-02-26 | Wire clamping device |
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| CN (1) | CN212247443U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111235772A (en) * | 2020-02-26 | 2020-06-05 | 宁波舒普机电股份有限公司 | Wire clamping device |
-
2020
- 2020-02-26 CN CN202020211342.9U patent/CN212247443U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111235772A (en) * | 2020-02-26 | 2020-06-05 | 宁波舒普机电股份有限公司 | Wire clamping device |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 315100 Zhejiang city of Ningbo province Yinzhou District Jingu Road No. 219 Patentee after: Shupu Intelligent Technology Co.,Ltd. Address before: 315100 Zhejiang city of Ningbo province Yinzhou District Jingu Road No. 219 Patentee before: NINGBO SUPREME ELECTRONIC MACHINERY Inc. |
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| CP01 | Change in the name or title of a patent holder |