Upward feeding adjusting mechanism of overedger

Abstract

The invention relates to the technical field of sewing machines, in particular to a feeding adjusting mechanism of an overedger. A distance adjusting mechanism of a feeding adjusting mechanism in the prior art has structural defects, and distance adjustment is not convenient and fast enough. An upward feeding adjusting mechanism of an overedger is provided with a driving set, an upper cloth feeding tooth set and a driving connecting rod, the upper cloth feeding tooth set is provided with a transmission connecting rod and upper cloth feeding teeth, and the upward feeding adjusting mechanism comprises an operating piece, an adjusting shaft connecting the operating piece and the driving connecting rod, an adjusting connecting rod on the adjusting shaft and a driving plate connected with the adjusting connecting rod. The adjusting connecting rod is provided with a first rod piece connected with the transmission connecting rod and a second rod piece connected with the driving plate and connected with the first rod piece end to end to form an included angle, the operating piece is provided with a first gear, the adjusting shaft is provided with a second gear meshed with the first gear, and when the adjusting shaft is operated, the meshing position of the second gear and the first gear is changed, and the included angle between the second rod piece and the first rod piece is changed. And the cloth feeding stroke distance of the upper cloth feeding teeth is changed. The device is reasonable in structure, convenient to adjust and accurate in position.

Description

Technical Field

[0001] This invention relates to the field of sewing machine technology, and more specifically to an upward adjustment mechanism for an overlock sewing machine. Background Technology

[0002] With the diversification of existing fabrics, overlock sewing machines need to adjust the feeding distance of the upper feed teeth to accommodate various fabrics and sewing needs.

[0003] The feed adjustment mechanism of existing overlock sewing machines is hidden inside the machine casing. If the user wants to adjust the feed distance of the feed teeth, the casing must be disassembled and tools must be used to make the adjustment. This requires interrupting the sewing process, making the adjustment procedure quite inconvenient.

[0004] To address the aforementioned issues, while published patent CN217997516U proposes an adjustment mechanism for the feed tooth spacing of an overlock sewing machine, featuring a handle for operation, allowing users to adjust the feed distance, this mechanism still suffers from structural shortcomings after prolonged use. Specifically, adjusting the distance is not convenient or quick enough. Therefore, the applicant in this case urgently seeks an upward feed adjustment mechanism applicable to overlock sewing machines that facilitates quick adjustment of the feed distance by the user. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing an upward adjustment mechanism for an overlock sewing machine that allows users to quickly adjust the feeding distance of the upward feeding teeth.

[0006] An upward feeding adjustment mechanism for an overlock sewing machine, the overlock sewing machine having a drive group and an upward feeding tooth group driven by the drive group, the drive group having a drive shaft and a drive linkage connected to the drive shaft, the upward feeding tooth group having a transmission linkage and an upward feeding tooth connected to the transmission linkage, and the upward feeding adjustment mechanism: The device includes an operating component, an adjusting shaft connecting the operating component and a drive linkage, an adjusting linkage mounted on the adjusting shaft, and a drive plate connecting the adjusting linkage. The adjusting linkage has a first rod connecting to a transmission linkage and a second rod connecting to the drive plate and forming an angle with the first rod. Part of the operating component is exposed on the surface of the overlock sewing machine. The operating component has a first gear, and the adjusting shaft has a second gear meshing with the first gear. When the adjusting shaft is operated, it changes the meshing position of the second gear and the first gear, and drives the second rod to change the angle between the second rod and the first rod, thereby changing the feeding stroke distance of the upper feeding tooth.

[0007] It has a reasonable structure, is easy to adjust, and has a precise position.

[0008] As a further improvement and supplement to the above solution, the present invention also includes the following additional technical features: The operating component includes an operating knob exposed on the surface of the overlock sewing machine and a shaft connected to the operating knob, with a first gear mounted on the shaft. Adjustment is convenient and quick.

[0009] The operating component has at least one stop on the operating knob, and the upward adjustment mechanism has a positioning rod facing the operating knob and capable of contacting the stop. The structure is reasonable and effectively achieves positioning.

[0010] The operating knob has multiple protrusions that can contact the positioning rod. This effectively limits the movement and ensures good stability.

[0011] The aforementioned upward adjustment mechanism has a support spring connected to a positioning rod. The support spring provides support to the positioning rod, keeping it in contact with one of the protrusions. This also reduces vibration and further improves stability.

[0012] The drive plate includes a base plate disposed on the adjustment shaft and connected to the second rod, and a drive block disposed on the base plate. The structure is reasonable, the connection is stable, and it is compact.

[0013] The drive linkage has a drive crank connected to the drive shaft, a connecting shaft connected to the drive crank, and a rod assembly connecting the connecting shaft and the adjusting linkage. One end of the connecting shaft is mounted on the housing of the overlock sewing machine. The structure is reasonable, and the transmission power is large.

[0014] The following beneficial effects can be achieved by using this invention: The upward feeding adjustment mechanism of this invention is provided with an operable operating component. When the operating component is operated, the adjusting shaft changes the meshing position of the second gear and the first gear, and drives the second rod to change the included angle between the second rod and the first rod, causing the driving plate to change the driving linkage, thereby achieving the purpose of adjusting the feeding stroke distance of the upward feeding tooth. This invention has a reasonable structure, good stability, convenient and quick adjustment, and precise adjustment position. It improves the problems of structural complexity and insufficient stability caused by the original structure. Attached Figure Description

[0015] Figure 1 A schematic diagram of an overlock sewing machine according to an embodiment of the present invention.

[0016] Figure 2 A three-dimensional structural schematic diagram of an embodiment of the present invention.

[0017] Figure 3 An exploded perspective view of an embodiment of the present invention.

[0018] Figure 4 A side view schematic diagram of an embodiment of the present invention (I).

[0019] Figure 5 A side view schematic diagram of an embodiment of the present invention (II).

[0020] In the picture: 21: Operating component; 211: First gear; 212: First direction; 213: Second direction; 214: Operating knob; 215: Shaft; 216: Stop; 217: Protrusion. 22: Adjusting shaft; 221: Second gear 23: Adjusting link; 231: First link; 232: Second link; 233: Angle 24: Drive plate; 241: Base plate; 242: Drive block; 243: Linkage rod 25: Positioning rod; 26: Support spring; 40: Housing 50: Drive assembly; 51: Drive shaft; 52: Drive connecting rod; 521: Drive crank; 522: Connecting shaft; 523: Linkage assembly 60: Upper feeding gear assembly; 61: Transmission connecting rod; 62: Upper feeding gear; 621: Distance Detailed Implementation

[0021] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] like Figure 1-5 As shown, the present invention is an upward adjustment mechanism for an overlock sewing machine.

[0023] The overlock sewing machine described in this embodiment has an upward adjustment mechanism. The overlock sewing machine has a drive group 50 and an upward fabric feeding tooth group 60 driven by the drive group 50. The drive group 50 has a drive shaft 51 and a drive link 52 connected to the drive shaft 51. The upward fabric feeding tooth group 60 has a transmission link 61 and an upward fabric feeding tooth 62 connected to the transmission link 61.

[0024] This feed adjustment mechanism is applied to an overlock sewing machine. The overlock sewing machine has a housing 40, a drive assembly 50, and a feed tooth assembly 60. The housing 40 houses the feed adjustment mechanism, the drive assembly 50, and the feed tooth assembly 60. The drive assembly 50 has a drive shaft 51 and a drive linkage 52. The drive shaft 51 is powered by a drive motor of the overlock sewing machine and rotates under the drive of the drive motor. The drive linkage 52 is connected to the drive shaft 51 and is driven when the drive shaft 51 rotates. The feed tooth assembly 60 is driven by the drive assembly 50 and has a transmission linkage 61 and a feed tooth 62. The transmission link 61 is connected to the upper feeding tooth 62. The transmission link 61 rotates with the drive link 52. When the drive link 52 works and drives the transmission link 61, the transmission link 61 drives the upper feeding tooth 62, causing the upper feeding tooth 62 to generate a feeding stroke.

[0025] The upward adjustment mechanism of the present invention: The machine includes an operating component 21, an adjusting shaft 22 connecting the operating component 21 and the drive linkage 52, an adjusting linkage 23 disposed on the adjusting shaft 22, and a drive plate 24 connecting the adjusting linkage 23. The adjusting linkage 23 has a first rod 231 connecting to the transmission linkage 61 and a second rod 232 connecting to the drive plate 24 and connected to the first rod 231 at both ends to form an angle 233. Part of the operating component 21 is exposed on the surface of the overlock sewing machine. The operating component 21 has a first gear 211. The adjusting shaft 22 has a second gear 221 meshing with the first gear 211. When the adjusting shaft 22 is operated, it changes the meshing position of the second gear 221 and the first gear 211, and drives the second rod 232 to change the angle 233 between the second rod 232 and the first rod 231, thereby changing the feeding stroke distance 621 of the upper feeding tooth 62.

[0026] The upward adjustment mechanism connects the drive assembly 50 and the upward fabric feeding gear assembly 60. The upward adjustment mechanism 20 includes an operating element 21, an adjusting shaft 22, an adjusting linkage 23, and a driving plate 24. Part of the operating element 21 is exposed outside the housing 40 of the overlock sewing machine for operation. The adjusting shaft 22 connects the operating element 21 and the drive linkage 52 and is driven by the operating element 21. The adjusting linkage 23 is mounted on the adjusting shaft 22, and the adjusting shaft 22 is driven when the adjusting linkage 23 is driven. The driving plate 24 is mounted on the adjusting shaft 22 and connected to the adjusting linkage 23. The driving plate 24, the adjusting shaft 22, and the adjusting linkage 23 form a linkage relationship. Furthermore, the adjusting linkage 23 includes a first linkage 231 and a second linkage 232. The first linkage 231 is connected to the transmission linkage 61, and the second linkage 232 is connected to the driving plate 24 and the first linkage 231. The second linkage 232 and the first linkage 231 are connected end-to-end with the adjusting shaft 22 as the contact point, forming an included angle 233. The operating member 21 is provided with a first gear 211, and the adjusting shaft 22 has a second gear 221. The second gear 221 meshes with the first gear 211, causing the adjusting shaft 22 to be driven by the operating member 21.

[0027] Further, the operating component 21 includes an operating knob 214 exposed on the surface of the overlock sewing machine, and a shaft 215 connected to the operating knob 214, with a first gear 211 disposed on the shaft 215. The operating knob 214 is exposed on the surface of the overlock sewing machine housing 40, and the shaft 215 connects to the operating knob 214 and is provided with the first gear 211. In practice, when the operating knob 214 is operated in the first direction 212, the included angle 233 between the first rod 231 and the second rod 232 increases, increasing the feed stroke distance 621 of the upper feed tooth 62. Conversely, when the operating knob 214 is operated in the second direction 213 opposite to the first direction 212, the included angle 233 between the first rod 231 and the second rod 232 decreases, thus restoring the feed stroke distance 621 of the upper feed tooth 62. In one embodiment, please refer to... Figure 5 The included angle 233 between the first rod 231 and the second rod 232 can be as small as 0, at which point the first rod 231 and the second rod 232 overlap, and the distance 621 of the feeding stroke of the upper feeding tooth 62 is minimized. In another embodiment, the included angle 233 between the first rod 231 and the second rod 232 will not return to its original state when the overlock sewing machine stops; the first rod 231 and the second rod 232 will maintain the included angle 233 from the previous sewing.

[0028] Further, the operating member 21 has at least one stop 216 disposed on the operating knob 214, and the upward adjustment mechanism has a positioning rod 25 facing the operating knob 214 and capable of contacting the stop 216. In one embodiment, the operating member 21 has at least one stop 216 disposed on the operating knob 214 and rotating with the operating knob 214. The upward adjustment mechanism has a positioning rod 25 disposed on the housing 40 and facing the operating knob 214. When the operating member 21 is operated to cause the positioning rod 25 to contact the stop 216, the positioning rod 25 restricts the operating knob 214 from continuing to rotate. In another embodiment, there are two stops 216, which equally divide the circumference of the operating knob 214. The positioning rod 25 is disposed between the two stops 216, and the two stops 216 together restrict the rotation range of the operating knob 214.

[0029] Furthermore, the operating knob 214 is formed with a plurality of protrusions 217 that can contact the positioning rod 25. In another embodiment, the operating knob 214 is formed with a plurality of protrusions 217, which are positioned facing the positioning rod 25, and the positioning rod 25 contacts one of the protrusions 217. When the user rotates the operating knob 214, the positioning rod 25 changes the contacting protrusion 217, improving the user's feel when operating the operating knob 214. In this embodiment, the protrusions 217 are located between the two stops 216.

[0030] Furthermore, the upward adjustment mechanism has a support spring 26 connected to the positioning rod 25. In another embodiment, the upward adjustment mechanism has a support spring 26 disposed within the housing 40 and connected to the positioning rod 25. The support spring 26 provides support to the positioning rod 25, keeping the positioning rod 25 in contact with one of the protrusions 217.

[0031] Further, the driving plate 24 includes a base plate 241 disposed on the adjusting shaft 22 and connected to the second rod 232, and a driving block 242 disposed on the base plate 241. In one embodiment, the driving plate 24 includes a base plate 241 and a driving block 242. The base plate 241 is disposed on the adjusting shaft 22 and connected to the second rod 232, and the driving block 242 is disposed on the base plate 241. The base plate 241, the driving block 242 and the second rod 232 form a linkage relationship. When the adjusting shaft 22 is driven, the base plate 241 is linked and drives the driving block 242 and the second rod 232, so that the included angle 233 between the second rod 232 and the first rod 231 changes. In another embodiment, the driving plate 24 includes a connecting rod 243, which is disposed on the driving block 242 and connected to the base plate 241. The connecting rod 243 drives the driving block 242 when the base plate 241 is displaced.

[0032] Furthermore, the drive linkage 52 includes a drive crank 521 connected to the drive shaft 51, a connecting shaft 522 connected to the drive crank 521, and a rod assembly 523 connecting the connecting shaft 522 and the adjusting linkage 52. One end of the connecting shaft 522 is mounted on the housing 40 of the overlock sewing machine. In one embodiment, the drive linkage 52 includes a drive crank 521, a connecting shaft 522, and a rod assembly 523. The drive crank 521 is connected to and driven by the drive shaft 51. The connecting shaft 522 is connected to and driven by the drive crank 521, and one end of the connecting shaft 522 is mounted on the housing 40 of the overlock sewing machine. The rod assembly 523 connects the connecting shaft 522 and the adjusting linkage 23. The rod assembly 523 is driven by the connecting shaft 522 and can transmit power to the transmission linkage 61 via the adjusting linkage 23.

[0033] When the feed adjustment mechanism of this overlock sewing machine is in use, Assume that initially, an angle 233 is formed between the first rod 231 and the second rod 232. When the user intends to adjust the feeding stroke distance 621 of the upper feeding tooth 62, the user operates the operating member 21 in a first direction 212. When the operating member 21 is operated, it changes the meshing position of the first gear 211 and the second gear 221, thereby driving the adjusting shaft 22. When the adjusting shaft 22 is driven, it simultaneously drives the second rod 232, changing the angle 233 between the second rod 232 and the first rod 231 (for example, increasing the angle 233). At this moment, the drive plate 24 is driven by the second rod 232, which changes the drive linkage 52, thereby causing the drive shaft 51 to drive the drive linkage 52 again. At this time, the drive linkage 52 changes the angle 233 between the first rod 231 and the second rod 232, thereby changing the drive on the transmission linkage 61, and thus adjusting the feeding stroke distance 621 of the upper feed tooth 62. If the user wants to reset the feeding stroke distance 621 of the upper feed tooth 62, the user operates the operating member 21 in a second direction 213 opposite to the first direction 212. At this time, the adjusting shaft 22 drives the second rod 232 to reset, restoring the angle 233, thus achieving the purpose of resetting the feeding stroke distance 621 of the upper feed tooth 62.

[0034] The upward adjustment mechanism of the present invention is provided with an operable operating member 21. When the operating member 21 is operated, the adjusting shaft 22 changes the meshing position of the second gear 221 and the first gear 211, and drives the second rod 232 to change the included angle 233 between the second rod 232 and the first rod 231. This causes the driving plate 24 to change the driving connecting rod 52, thereby adjusting the distance 621 of the feeding stroke of the upward feeding tooth 62. The present invention improves the problems of structural complexity and insufficient stability caused by the existing structure.

[0035] The above are preferred embodiments of the present invention and do not limit the scope of protection of the present invention. Any modifications and improvements made by those skilled in the art based on the design concept of the present invention should be considered within the scope of protection of the present invention.

Claims

1. An upward adjustment mechanism for an overlock sewing machine, the overlock sewing machine having a drive group (50) and an upward fabric feeding gear group (60) driven by the drive group (50), the drive group (50) having a drive shaft (51) and a drive linkage (52) connected to the drive shaft (51), the upward fabric feeding gear group (60) having a transmission linkage (61) and an upward fabric feeding gear (62) connected to the transmission linkage (61), the upward adjustment mechanism being characterized in that: It includes an operating element (21), an adjusting shaft (22) connecting the operating element (21) and a drive link (52), an adjusting link (23) disposed on the adjusting shaft (22), and a drive plate (24) connecting the adjusting link (23). The adjusting link (23) has a first rod (231) connecting to a transmission link (61) and a second rod (232) connecting to the drive plate (24) and connected to the first rod (231) head to tail to form an included angle (233). The operating element (21) has a portion of... The operating component (21) has a first gear (211) and the adjusting shaft (22) has a second gear (221) that meshes with the first gear (211). When the adjusting shaft (22) is operated, it changes the meshing position of the second gear (221) and the first gear (211) and drives the second rod (232) to change the included angle (233) between the second rod (232) and the first rod (231), thereby changing the feeding stroke distance (621) of the upper feeding tooth (62).

2. The feeding and adjusting mechanism of the overlock sewing machine as described in claim 1, characterized in that: The operating component (21) includes an operating knob (214) exposed on the surface of the overlock sewing machine, and a shaft (215) connected to the operating knob (214), with a first gear (211) disposed on the shaft (215).

3. The feeding and adjusting mechanism of the overlock sewing machine as described in claim 2, characterized in that: The operating element (21) has at least one stop (216) provided on the operating knob (214), and the upward adjustment mechanism has a positioning rod (25) facing the operating knob (214) and capable of contacting the stop (216).

4. The feeding adjustment mechanism of the overlock sewing machine as described in claim 3, characterized in that: The operating knob (214) has a plurality of protrusions (217) that can contact the positioning rod (25).

5. The feeding and adjusting mechanism of the overlock sewing machine as described in claim 4, characterized in that: The aforementioned upward adjustment mechanism has a support spring (26) connected to the positioning rod (25).

6. The feeding adjustment mechanism of the overlock sewing machine as described in any one of claims 1 to 5, characterized in that: The drive plate (24) includes a base plate (241) disposed on the adjustment shaft (22) and connected to the second rod (232), and a drive block (242) disposed on the base plate (241).

7. The feeding and adjusting mechanism of the overlock sewing machine as described in claim 6, characterized in that: The drive linkage (52) has a drive crank (521) connected to the drive shaft (51), a connecting shaft (522) connected to the drive crank (521), and a rod assembly (523) connecting the connecting shaft (522) and the adjusting linkage (52). One end of the connecting shaft (522) is located on the housing (40) of the overlock sewing machine.

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