CN219218351U - Thread cutting device of sewing machine - Google Patents
Thread cutting device of sewing machine Download PDFInfo
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- CN219218351U CN219218351U CN202320309208.6U CN202320309208U CN219218351U CN 219218351 U CN219218351 U CN 219218351U CN 202320309208 U CN202320309208 U CN 202320309208U CN 219218351 U CN219218351 U CN 219218351U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/66—Disintegrating fibre-containing textile articles to obtain fibres for re-use
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Abstract
The utility model relates to a thread cutting device of a sewing machine. Mainly solves the technical problems of poor controllability, poor action linkage and poor flexibility of the traditional thread cutting device of the sewing machine due to limited structure. The novel wire cutting device comprises a support, a crochet hook and a wire cutting mechanism, wherein the wire cutting mechanism comprises a pushing telescopic component, a transmission component, a cam, a rotating arm, a rolling part, a movable cutter, a fixed cutter and an elastic part, the rolling part is rotatably arranged on the rotating arm, the cam is provided with an arc-shaped groove and a cam surface, the movable cutter is fixed at the end part of the crochet hook, the fixed cutter is fixed on the support, one end of the elastic part is connected with the rotating arm, and the other end of the elastic part is connected with the support. By adopting the scheme, when the wire is cut, the device has the advantages of strong controllability, high action linkage, high flexibility, reasonable and reliable structure and the like, and friction force is reduced by matching the cam with the rolling piece, so that the service life of the device is effectively prolonged, and the service performance of the device is improved.
Description
Technical Field
The utility model relates to a sewing device, in particular to a thread cutting device of a sewing machine.
Background
At present, in the use process of the existing sewing machine, such as a prying sewing machine and a hidden sewing machine, the hook needle is used for sewing, and the thread is cut through the thread cutting mechanism after sewing is finished, but the thread cutting mechanism has the technical problems of inconvenient operation, poor controllability, poor action linkage and poor flexibility when the sewing machine cuts threads due to limited structure and installation, so that the use performance is influenced, and in addition, the parts are easy to wear in the use process, so that the service life of the sewing machine is influenced.
Disclosure of Invention
In order to overcome the defects and shortcomings of the background technology, the utility model provides a thread cutting device of a sewing machine, which solves the technical problems of poor controllability, poor action linkage and poor flexibility of the thread cutting device of the existing sewing machine due to the limited structure.
The technical scheme of the utility model is as follows: the utility model provides a thread cutting device of sewing machine, includes support, crochet hook, its characterized in that: the wire shearing mechanism comprises a pushing telescopic component, a transmission component, a cam, a rotating arm, a rolling component, a movable knife, a fixed knife and an elastic component, wherein the pushing telescopic component and the transmission component are installed on the support, the rotating arm is hinged to the support, the crochet hook is fixed on the rotating arm, the rolling component is rotatably arranged on the rotating arm, the transmission component drives the cam to rotate, the cam is located below the rotating arm, an arc-shaped groove and a cam surface are arranged on the cam, the movable knife is fixed on the end part of the crochet hook, the fixed knife is fixed on the support, one end of the elastic component is connected with the rotating arm, the other end of the elastic component is connected with the support, the pushing telescopic component pushes the rotating arm to rotate downwards and drive the crochet hook to rotate, the rolling component is matched with the arc-shaped groove of the cam to drive the crochet hook to achieve wire hooking, the cam rotates and drives the rotating arm to rotate upwards through the rolling component, and the cam surface drives the rotating arm to rotate upwards, and the movable knife is matched with the fixed knife to achieve wire shearing.
The rocking arm includes first rocking arm and second rocking arm, the rolling element includes first rolling element and second rolling element, first rolling element is installed on first rocking arm, the second rolling element is installed on the second rocking arm, the second rolling element is located first rolling element below and with its rolling fit, the second rolling element cooperatees with the cam, first rocking arm and second rocking arm articulate in on the support, the one end of elastic component with the support is connected, the other end with the second rocking arm is connected.
The support is provided with a positioning block, and the positioning block is positioned at the upper end of the second rotating arm and is in clamping fit with the second rotating arm.
The fixing mechanism comprises a fixing block, an adjusting piece and a fastening piece, wherein a clamping groove is formed in the fixing block, the fixed knife is arranged in the clamping groove, the adjusting piece is in threaded fit with the fixing block and is pressed against the fixed knife, and the fastening piece penetrates through the fixed knife and is connected with the fixing block.
The end part of the crochet hook is provided with an inclined plane, and the outer side of the end part of the crochet hook is provided with a crochet slot.
The rolling element is a bearing or a roller.
The pushing telescopic assembly comprises an air cylinder and a telescopic ejector rod, and the telescopic ejector rod is connected with the air cylinder and is in pressing fit with the rotating arm.
The transmission assembly comprises a rotating shaft, a first sector gear, a second sector gear and a transmission shaft, the cam is installed on the rotating shaft, the first sector gear is installed at the end part of the rotating shaft and matched with the second sector gear, and the second sector gear is installed on the transmission shaft.
The utility model has the following beneficial effects: by adopting the scheme, when the thread is cut, the purpose of cutting the thread is realized under the action of the thread cutting device consisting of the cam combined rotating arm, the rolling part, the crochet hook and the movable fixed knife, the thread cutting device has the advantages of strong controllability, high action linkage, high flexibility, reasonable structure, reliability and the like, and the friction force is reduced between the cam and the rolling part to drive the rotating arm and the crochet hook to act so as to realize thread cutting, thereby preventing the action precision from being reduced to influence the use due to abrasion, effectively prolonging the service life and improving the service performance of the device.
Drawings
Fig. 1 is a schematic diagram of a structure of the present utility model during trimming.
Fig. 2 is a schematic view of the internal structure of the present utility model when cutting wires.
FIG. 3 is a schematic view of an internal structure of another angle of the present utility model when cutting a wire.
Fig. 4 is a schematic view of a partial structure of the present utility model when cutting a wire.
Fig. 5 is a schematic diagram of the structure of the present utility model when the thread is hooked.
FIG. 6 is a schematic diagram of the internal structure of the present utility model when the thread is hooked.
Fig. 7 is a schematic diagram of a partial structure of the present utility model when the thread is hooked.
Fig. 8 is a schematic diagram of a connection structure of a stationary knife and a fixing mechanism in the present utility model.
Fig. 9 is a schematic view of another angle structure of the present utility model.
In the drawing, a bracket 1, a crochet hook 2, a cam 3, an arc-shaped groove 31, a cam surface 32, a rotating arm 4, a first rotating arm 41, a second rotating arm 42, a rolling element 5, a first rolling element 51, a second rolling element 52, a movable knife 6, a fixed knife 7, an elastic element 8, a positioning block 9, a fixed block 10, an adjusting element 11, a fastening element 12, a clamping groove 13, an inclined surface 14, a hooking groove 15, an air cylinder 16, a telescopic ejector rod 17, a rotating shaft 18, a first sector gear 19, a second sector gear 20 and a transmission shaft 21.
Detailed Description
The following is a further explanation of embodiments of the utility model:
as shown in the figure, the thread cutting device of the sewing machine comprises a support 1 and a crochet hook 2, and further comprises a thread cutting mechanism, wherein the thread cutting mechanism comprises a pushing telescopic component, a transmission component, a cam 3, a rotating arm 4, a rolling piece 5, a moving knife 6, a fixed knife 7 and an elastic piece 8, the pushing telescopic component and the transmission component are installed on the support 1, the rotating arm 4 is hinged on the support 1, the crochet hook 2 is fixed on the rotating arm 4, the rolling piece 5 is rotatably arranged on the rotating arm 4, the transmission component drives the cam 3 to rotate, the cam 3 is located below the rotating arm 4, an arc groove 31 and a cam surface 32 are formed in the cam 3, the moving knife 6 is fixed at the end of the crochet hook 2, the fixed knife 7 is fixed on the support 1, one end of the elastic piece 8 is connected with the support 1, the pushing telescopic component is pushed against the rotating arm 4 to rotate downwards and drive the crochet hook 2, the cam 3 is driven by the rolling piece 5 to drive the rotating arm 3 to rotate along with the arc groove 32, and the matched cam 3 is driven by the rotating arm 3 and the rotating knife 3 to rotate along with the hook 4. When the rotary arm and the crochet hook are in the initial positions, the rolling element corresponds to the arc-shaped groove of the cam, the rolling element has a downward moving space, and when a thread is hooked, the pushing telescopic component acts to push the rotary arm, so that the rotary arm rotates downwards and drives the rolling element to press downwards until the rolling element presses downwards into the arc-shaped groove of the cam, the elastic element generates a restoring force when the rotary arm rotates, the rotary arm presses downwards to drive the crochet hook and the movable knife to move downwards, the crochet hook slides into the sewing position, and the sewn thread can slide into the thread hooking groove along the inclined plane to achieve the purpose of hooking the thread. After the thread is hooked, when the thread is needed to be cut, the cam is driven to rotate along with the transmission component, and when the cam surface of the cam rotates to the position where the cam surface of the cam is matched with the second rolling piece, the cam surface can push the rolling piece to enable the rotating arm to rotate upwards, and under the reset action of the elastic piece, the crochet hook on the rotating arm drives the thread to move upwards, and the thread cutting purpose is achieved through the contact between the movable knife on the surface of the crochet hook and the fixed knife on the support. By adopting the scheme, when the thread is cut, the purpose of cutting the thread is realized under the action of the thread cutting device consisting of the cam combined rotating arm, the rolling part, the crochet hook and the movable fixed knife, the thread cutting device has the advantages of strong controllability, high action linkage, high flexibility, reasonable structure, reliability and the like, and the friction force is reduced between the cam and the rolling part to drive the rotating arm and the crochet hook to act so as to realize thread cutting, thereby preventing the action precision from being reduced to influence the use due to abrasion, effectively prolonging the service life and improving the service performance of the device.
In this embodiment, as shown in the figure, the rotating arm 4 includes a first rotating arm 41 and a second rotating arm 42, the rolling member 5 includes a first rolling member 51 and a second rolling member 52, the first rolling member 51 is mounted on the first rotating arm 41, the second rolling member 52 is mounted on the second rotating arm 42, the second rolling member 52 is located below the first rolling member 51 and is in rolling engagement with the first rolling member, the second rolling member 52 is engaged with the cam 3, the first rotating arm 41 and the second rotating arm 42 are hinged on the bracket 1, one end of the elastic member 8 is connected with the bracket 1, and the other end is connected with the second rotating arm 42. The first rotating arm 41 is located at the upper end of the second rotating arm 42, the first rolling element 51 is installed on the first rotating arm 41, the second rolling element 52 is installed on the first rotating arm 42, the first rolling element is located above the second rolling element and in rolling fit with each other, when the cam is used, the first rotating arm drives the first rolling element to press down, the first rolling element presses down to drive the second rolling element to rotate, the elastic element generates restoring force, the cam at the moment just rotates to the position corresponding to the arc-shaped groove and the second rolling element, the second rolling element has a downward moving space when pressing down, the first rotating arm presses down to drive the crochet needle and the movable knife to move downwards, the crochet needle on the first rotating arm slides into a sewing position, the sewing thread slides into the knife crochet groove along the inclined plane, the second rolling element is driven to rotate upwards by the second rolling element along with the rotation of the cam, the second rolling element is driven to move upwards by the cam, the second rotating arm is driven by the second rolling element to move the cam and the first rotating arm is driven to move upwards by the fixed arm, and the knife moves upwards on the fixed knife support is contacted with the knife, and the knife moves upwards on the fixed support is driven by the knife. Adopt above-mentioned structure for thread cutting device, when the action, have the controllability strong, the linkage is better and advantages such as stability is high, especially adopt the cooperation of two rolling elements and cam to make each other reduce frictional force, prevent to lead to action precision decline in order to influence the use owing to wearing and tearing, effectively improve its performance.
In this embodiment, as shown in the figure, the support 1 is provided with a positioning block 9, and the positioning block 9 is located at the upper end of the second rotating arm 42 and is engaged with the second rotating arm. Through set up the locating piece on the support for the second rocking arm can receive spacing effect when shifting up, thereby makes first rocking arm control in controllable within range, prevents to shift up excessively, thereby keeps overall structure's stability and controllability, and the action is more reliable, reasonable.
In this embodiment, as shown in the figure, the support 1 is provided with a fixing mechanism, the fixing mechanism includes a fixing block 10, an adjusting member 11 and a fastening member 12, the fixing block 10 is provided with a clamping groove 13, the fixed knife 7 is disposed in the clamping groove 13, the adjusting member 11 is in threaded engagement with the fixing block 10 and is pressed against the fixed knife 7, and the fastening member 12 passes through the fixed knife 7 and is connected with the fixing block 10. The fixed knife is installed in the bracket through the fixing mechanism, the fixed knife is installed in the clamping groove, the adjusting piece can be screwed by the adjusting piece and fixed through the fastening piece, and the fixed knife fixing device has the advantages of being good in installation firmness, high in reliability, adjusting function and the like.
In this embodiment, as shown in the figure, an inclined surface 14 is provided at the end of the crochet hook 2, and a crochet hook groove 15 is provided at the outer side of the end of the crochet hook 2. Through setting up the inclined plane at the tip of crochet hook, when crochet hook slides into the department of making up, the line can be along this inclined plane slip knife collude in the wire casing, colludes the line on the crochet hook through collude the wire casing to the crochet hook drives the line and reciprocates the purpose of realizing cutting the line, is convenient for collude the line, colludes the line more reliably.
In this embodiment, as shown in the figure, the rolling member 5 is a bearing or a roller. The rolling elements can be selected from bearings, rollers or the like according to actual needs. The rolling piece is in rolling fit, so that when the rolling piece is matched with the cam, the action linkage performance and the flexibility are better.
In this embodiment, as shown in the figure, the pushing telescopic assembly includes a cylinder 16 and a telescopic ejector rod 17, where the telescopic ejector rod 17 is connected with the cylinder 16 and is in pressing fit with the rotating arm 4. When the pushing telescopic component is used, the telescopic ejector rod is driven to be pushed against the rotating arm through the action of the air cylinder, the rotating arm is pushed to rotate downwards, the crochet hook is driven to reach a proper position, and then the crochet hook is retracted to prepare for the next action, and the pushing telescopic component such as a hydraulic cylinder and a telescopic rod can be selected as required.
In this embodiment, as shown in the figure, the transmission assembly includes a rotating shaft 18, a first sector gear 19, a second sector gear 20, and a transmission shaft 21, the cam 3 is mounted on the rotating shaft 18, the first sector gear 19 is mounted on an end of the rotating shaft 18 and is matched with the second sector gear 20, and the second sector gear 20 is mounted on the transmission shaft 21. The first sector gear 19 and the second sector gear 20 are matched, and the second sector gear 20 drives the cam on the rotating shaft to rotate through the first sector gear 19, so that the transmission is reliable, and the action is stable.
Claims (8)
1. The utility model provides a thread cutting device of sewing machine, includes support (1), crochet hook (2), its characterized in that: the thread cutting mechanism comprises a pushing telescopic component, a transmission component, a cam (3), a rotating arm (4), a rolling element (5), a movable knife (6), a fixed knife (7) and an elastic piece (8), wherein the pushing telescopic component and the transmission component are arranged on the support (1), the rotating arm (4) is hinged on the support (1), the crochet needle (2) is fixed on the rotating arm (4), the rolling element (5) is rotatably arranged on the rotating arm (4), the transmission component drives the cam (3) to rotate, the cam (3) is positioned below the rotating arm (4), an arc-shaped groove (31) and a cam surface (32) are arranged on the cam (3), the movable knife (6) is fixed on the end part of the crochet needle (2), the fixed knife (7) is fixed on the support (1), one end of the elastic piece (8) is connected with the rotating arm (4), the other end of the elastic piece is connected with the support (1) and drives the hook needle (2) to rotate, the cam (3) is positioned below the rotating arm (4), the cam (3) and drives the rolling element (3) to rotate downwards, and the hook needle (2) is driven to rotate, the cam (3) rotates and pushes the rolling element (5) through the cam surface (32) to drive the rotating arm (4) to rotate upwards, and the rotating arm (4) drives the movable knife (6) to be matched with the fixed knife (7) to realize wire cutting.
2. A thread cutting apparatus of a sewing machine as recited in claim 1, wherein: the rotating arm (4) comprises a first rotating arm (41) and a second rotating arm (42), the rolling elements (5) comprise a first rolling element (51) and a second rolling element (52), the first rolling element (51) is arranged on the first rotating arm (41), the second rolling element (52) is arranged on the second rotating arm (42), the second rolling element (52) is arranged below the first rolling element (51) and is in rolling fit with the first rolling element, the second rolling element (52) is matched with the cam (3), the first rotating arm (41) and the second rotating arm (42) are hinged to the support (1), one end of the elastic element (8) is connected with the support (1), and the other end of the elastic element is connected with the second rotating arm (42).
3. A thread cutting apparatus of a sewing machine as recited in claim 2, wherein: the support (1) is provided with a positioning block (9), and the positioning block (9) is positioned at the upper end of the second rotating arm (42) and is matched with the second rotating arm in a clamping way.
4. A thread cutting device for a sewing machine according to claim 1, 2 or 3, wherein: be equipped with fixed establishment on support (1), fixed establishment includes fixed block (10), regulating part (11) and fastener (12), be equipped with draw-in groove (13) on fixed block (10), stationary knife (7) are arranged in draw-in groove (13), regulating part (11) with fixed block (10) screw thread cooperation and roof pressure in on stationary knife (7), fastener (12) pass stationary knife (7) with fixed block (10) are connected.
5. A thread cutting device for a sewing machine according to claim 1, 2 or 3, wherein: the end part of the crochet hook (2) is provided with an inclined surface (14), and the outer side of the end part of the crochet hook (2) is provided with a crochet groove (15).
6. A thread cutting device for a sewing machine according to claim 1, 2 or 3, wherein: the rolling elements (5) are bearings or rollers.
7. A thread cutting device for a sewing machine according to claim 1, 2 or 3, wherein: the pushing telescopic assembly comprises an air cylinder (16) and a telescopic ejector rod (17), and the telescopic ejector rod (17) is connected with the air cylinder (16) and is in pushing fit with the rotating arm (4).
8. A thread cutting device for a sewing machine according to claim 1, 2 or 3, wherein: the transmission assembly comprises a rotating shaft (18), a first sector gear (19), a second sector gear (20) and a transmission shaft (21), wherein the cam (3) is installed on the rotating shaft (18), the first sector gear (19) is installed at the end part of the rotating shaft (18) and matched with the second sector gear (20), and the second sector gear (20) is installed on the transmission shaft (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320309208.6U CN219218351U (en) | 2023-02-13 | 2023-02-13 | Thread cutting device of sewing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320309208.6U CN219218351U (en) | 2023-02-13 | 2023-02-13 | Thread cutting device of sewing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219218351U true CN219218351U (en) | 2023-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320309208.6U Active CN219218351U (en) | 2023-02-13 | 2023-02-13 | Thread cutting device of sewing machine |
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| CN (1) | CN219218351U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2023
- 2023-02-13 CN CN202320309208.6U patent/CN219218351U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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