Stitch length adjusting mechanism of decorative edge overlock machine
By designing an automated trim joint seam needle distance adjustment mechanism, using supporting pillars, guide chutes, springs and bayonets and other components, the problems of cumbersome and inaccurate traditional manual adjustment are solved, and efficient and accurate needle distance adjustment is achieved.
Patent Information
- Application Number
- CN202421563678.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-04
AI Technical Summary
The traditional trim cover joint machine needle distance adjustment mechanism requires manual and accurate adjustment of needle distance. Improper operation may lead to inaccurate or unstable needle distance, and the adjustment process is cumbersome, which increases the operator's workload and time-consuming.
A needle distance adjustment mechanism including a base and a lower needle mechanism is designed, and automatic adjustment is achieved through components such as pillars, guide grooves, springs and bayonets to ensure accurate adjustment of the needle distance.
It avoids additional manual adjustment, improves the convenience and efficiency of adjusting the needle, ensures that the needle spacing can reach the precise position every time, and improves the accuracy and reliability of adjustment.
Smart Images
Figure CN222834548U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sewing machines, in particular to a needle distance adjusting mechanism for an edge overlock sewing machine. Background Art
[0002] A decorative hemming machine is a special sewing machine used to sew the edges of fabrics and add decorative stripes to the edges at the same time. It can usually achieve a variety of different hemming effects by adjusting different accessories and settings, including straight hemming, wavy hemming, diagonal hemming, etc. However, by adjusting the needle length, the depth of the needle to the fabric can be controlled to ensure that the needle passes through the fabric at the correct position, thereby obtaining a smooth and even seam, and ensuring sewing strength and quality;
[0003] The traditional stitch adjustment mechanism of the hemming overlock sewing machine uses a screwdriver to gently loosen the screw that fixes the needle, but do not completely unscrew it, and gently move the needle up and down to adjust the distance between the needle tip and the stitch foot;
[0004] The traditional stitch length adjustment mechanism of the trimming overlock sewing machine has the following problems: manual adjustment of the stitch length requires accurate control of the needle position and distance. If the operation is improper, it may cause inaccurate or unstable stitch length, and the process is cumbersome, especially for situations where the stitch length needs to be adjusted frequently, which will increase the operator's workload and time. For this reason, we propose a stitch length adjustment mechanism for the trimming overlock sewing machine. Utility Model Content
[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide a needle distance adjustment mechanism for a trimming overlock sewing machine, thereby avoiding additional manual adjustment, improving the convenience and efficiency of adjusting the needle, and effectively solving the problems in the background technology.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a needle distance adjustment mechanism of a trimming overlock sewing machine, comprising a base and a needle lowering mechanism;
[0007] Base: The upper surface of the base is fixedly connected with a workbench, the left end of the upper surface of the workbench is provided with an avoidance groove, the right end of the upper surface of the workbench is fixedly connected with a mounting frame, and the left end of the mounting frame is provided with a mounting groove;
[0008] Needle lowering mechanism: it includes a pillar and a guide slot, the guide slot is respectively opened on the upper and lower inner walls of the mounting slot, a pillar is slidably connected between the inner walls of the guide slot, an adjustment mechanism is provided at the bottom end of the pillar, a needle is provided at the bottom end of the adjustment mechanism, the needle corresponds to the upper and lower positions of the avoidance slot, thereby avoiding additional manual adjustment, improving the convenience and efficiency of adjusting the needle, and ensuring that each adjustment of the needle distance can reach a precise position, thereby improving the accuracy and reliability of the adjustment.
[0009] Furthermore, it also includes a single-chip microcomputer, which is arranged at the right end of the front side of the mounting frame, and the input end of the single-chip microcomputer is electrically connected to an external power supply to facilitate the regulation of electrical operation.
[0010] Furthermore, it also includes a rotating column, which is rotatably connected to the middle part of the front side of the mounting frame through a pin shaft, and a rotating groove is opened inside the rotating column to ensure that the needle can smoothly receive the wire when sewing.
[0011] Furthermore, the adjusting mechanism includes a fixed column, a sliding groove, a spring, a sliding column, a pressing column and a sliding hole. The fixed column is slidably connected to the inner wall of the lower end of the pillar. A needle is provided at the bottom end of the fixed column. Sliding grooves are respectively provided on the left and right sides of the upper end of the fixed column. The inner walls of the sliding grooves are fixedly connected with sliding columns. Sliding holes are provided inside the pressing columns. The inner walls of the sliding holes are slidably connected to the outer surfaces of adjacent sliding columns. The springs are fixedly connected between one side of the pressing column close to the center of the fixed column and the inner wall of the adjacent sliding groove. The springs are sleeved on the outer surface of the sliding column, which effectively ensures the accurate adjustment of the needle needle distance.
[0012] Furthermore, the adjustment mechanism also includes a bayonet, which is opened at the lower end of the outer surface of the pillar, and the inner wall of the bayonet is engaged with the outer end of the laterally adjacent pressing column to ensure that the needle distance can be adjusted to a precise position each time.
[0013] Furthermore, the needle lowering mechanism also includes a frame, a rotating shaft, a fixed plate, a sliding mouth and a rotating shaft, the rotating shaft is rotatably connected to the rear inner wall of the mounting groove, the front end of the rotating shaft is fixedly connected to the fixed plate, the left end of the front side surface of the fixed plate is rotatably connected to the rotating shaft, the frame is fixedly connected to the middle part of the pillar, the frame is located inside the mounting groove, a sliding mouth is opened inside the frame, the inside of the sliding mouth is slidably connected to the front end of the rotating shaft, and the operation of lowering the needle and sewing the fabric is performed to achieve the purpose of sewing.
[0014] Furthermore, the needle lowering mechanism also includes a motor, which is installed on the left end of the rear side of the mounting frame by bolts, the front end of the output shaft of the motor is fixedly connected to the rear end of the rotating shaft, and the input end of the motor is electrically connected to the output end of the single-chip microcomputer to drive the needle lowering mechanism.
[0015] Compared with the prior art, the beneficial effects of the utility model are: the needle distance adjustment mechanism of the trimming overlock sewing machine has the following advantages:
[0016] When the needle length needs to be adjusted, the operator presses the pressing posts on both sides so that the pressing posts are subjected to the pressing force and slide along the outer surface of the sliding post through the sliding hole, and the spring is compressed to separate from the laterally adjacent snap-in, and then the fixed post is pulled upward or downward. However, the pressing post will continue to be subjected to the squeezing force when moving on the inner wall of the pillar, and the spring will remain in a compressed state. When encountering the next snap-in during the movement, the spring stores energy through the stored elastic potential, applies a reverse force to make the pressing post rebound, and ensures that the pressing post is snapped with the corresponding snap-in, thereby effectively ensuring the accurate adjustment of the needle length. The action of the spring makes the entire adjustment process more stable and reliable, avoiding additional manual adjustment, improving the convenience and efficiency of adjusting the needle, and ensuring that the stitch length of the trimming overlock machine can be adjusted to a precise position each time, thereby improving the accuracy and reliability of the adjustment. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic diagram of the structure of the utility model;
[0018] Figure 2 It is a partial cross-sectional structural schematic diagram of the utility model;
[0019] Figure 3 It is a schematic diagram of the structure enlarged at point A of the utility model.
[0020] In the figure: 1 base, 2 workbench, 3 avoidance groove, 4 needle head, 5 mounting frame, 6 needle lowering mechanism, 61 pillar, 62 guide slide groove, 63 motor, 64 frame, 65 rotating shaft, 66 fixed plate, 67 slide mouth, 68 rotating shaft, 7 rotating groove, 8 rotating column, 9 single chip computer, 10 mounting groove, 11 adjustment mechanism, 111 fixed column, 112 bayonet, 113 slide groove, 114 spring, 115 sliding column, 116 pressing column, 117 sliding hole. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] See also Figure 1-3 , This embodiment provides a technical solution: a stitch length adjustment mechanism of a trimming overlock sewing machine, comprising a base 1 and a needle lowering mechanism 6;
[0023] Base 1: A workbench 2 is fixedly connected to its upper surface, an avoidance groove 3 is provided at the left end of the upper surface of the workbench 2, a mounting frame 5 is fixedly connected to the right end of the upper surface of the workbench 2, and also includes a single-chip microcomputer 9, which is arranged at the right end of the front side of the mounting frame 5, and the input end of the single-chip microcomputer 9 is electrically connected to an external power supply, a mounting groove 10 is provided at the left end of the mounting frame 5, and also includes a rotating column 8, which is rotatably connected to the middle part of the front side of the mounting frame 5 through a pin shaft, and a rotating groove 7 is provided inside the rotating column 8. First, the operator needs to pass the required wire through the rotating groove 7 on the rotating column 8, and guide it to the needle 4 through the rotating groove 7, so as to help accurately transmit the wire to the needle 4, ensure that the needle 4 can smoothly receive the wire during sewing, achieve a uniform sewing effect, and place the cloth on the workbench 2;
[0024] The needle lowering mechanism 6 includes a pillar 61 and a guide slot 62. The guide slot 62 is respectively provided on the upper and lower inner walls of the mounting groove 10. A pillar 61 is slidably connected between the inner walls of the guide slot 62. The needle lowering mechanism 6 also includes a frame 64, a rotating shaft 65, a fixed plate 66, a sliding opening 67 and a rotating shaft 68. The rotating shaft 68 is rotatably connected to the rear inner wall of the mounting groove 10. The front end of the rotating shaft 68 is fixedly connected to the fixed plate 66. The left end of the front side of the fixed plate 66 is rotatably connected to the rotating shaft 65. The frame 64 is fixedly connected to the middle part of the pillar 61. The frame 64 is located inside the mounting groove 10. A sliding opening 67 is provided inside the frame 64. The interior of the sliding opening 67 is slidably connected to the front end of the rotating shaft 65. The needle lowering mechanism 6 also includes a motor 63. The motor 63 is driven by a motor 63. The bolt is installed on the left end of the rear side surface of the mounting frame 5, the front end of the output shaft of the motor 63 is fixedly connected to the rear end of the rotating shaft 68, the input end of the motor 63 is electrically connected to the output end of the single chip microcomputer 9, and then the motor 63 is regulated to operate through the single chip microcomputer 9, the output shaft of the motor 63 drives the rotating shaft 68 to rotate, the rotating shaft 68 drives the fixed plate 66 to rotate, the fixed plate 66 drives the rotating shaft 65 at the left end of its front side surface to slide and rotate in the sliding mouth 67 on the frame 64, and then drives the support 61 to slide and avoid along the inner wall of the guide slide groove 62, thereby driving the needle 4 on the adjusting mechanism 11 to reciprocate, perform the operation of sewing the fabric with the lower needle, and achieve the purpose of sewing, the bottom end of the support 61 is provided with an adjusting mechanism 11, the bottom end of the adjusting mechanism 11 is provided with a needle 4, the needle 4 and The upper and lower positions of the avoidance groove 3 correspond, and the needle head 4 cooperates with the avoidance groove 3 when pressed down to prevent the needle head 4 from directly contacting the workbench 2. The adjustment mechanism 11 includes a fixed column 111, a sliding groove 113, a spring 114, a sliding column 115, a pressing column 116 and a sliding hole 117. The fixed column 111 is slidably connected to the inner wall of the lower end of the pillar 61, and the needle head 4 is provided at the bottom end of the fixed column 111. The left and right sides of the upper end of the fixed column 111 are respectively provided with sliding grooves 113, and the inner walls of the sliding grooves 113 are fixedly connected with sliding columns 115. The interior of the pressing column 116 is provided with sliding holes 117. The inner walls of the sliding holes 117 are slidably connected to the outer surfaces of the adjacent sliding columns 115. The springs 114 are fixedly connected to the pressing column 116 on one side close to the center of the fixed column 111 and the adjacent The spring 114 is sleeved on the outer surface of the sliding column 115 between the inner walls of the slide groove 113, and the adjustment mechanism 11 also includes a bayonet 112, which is opened at the lower end of the outer surface of the pillar 61, and the inner wall of the bayonet 112 is engaged with the outer end of the laterally adjacent pressing column 116. When the needle distance of the needle 4 needs to be adjusted, the operator presses the pressing columns 116 on both sides so that the pressing column 116 is subjected to the pressing force and slides along the outer surface of the sliding column 115 through the sliding hole 117, and compresses the spring 114 and separates from the laterally adjacent bayonet 112, and then pulls the fixing column 111 upward or downward, but the pressing column 116 will continue to be squeezed when moving on the inner wall of the pillar 61, and at the same time, the spring 114 remains in a compressed state.When the next bayonet 112 is encountered during the movement, the spring 114 stores the energy through the stored elastic potential, exerts a reverse force to make the pressing column 116 rebound, and ensures that the pressing column 116 is engaged with the corresponding bayonet 112, thereby effectively ensuring the accurate adjustment of the needle distance of the needle 4, and the force of the spring 114 makes the entire adjustment process more stable and reliable.
[0025] The working principle of the needle distance adjustment mechanism of the hemming overlock sewing machine provided by the utility model is as follows: first, the hemming overlock sewing operator needs to pass the required wire through the rotating groove 7 on the rotating column 8, and guide it to the needle 4 through the rotating groove 7, which helps to accurately transmit the wire to the needle 4, ensuring that the needle 4 can smoothly receive the wire during sewing, and achieve a uniform sewing effect. The cloth is placed on the workbench 2, and then the motor 63 is regulated to operate by the single-chip microcomputer 9. The output shaft of the motor 63 drives the rotating shaft 68 to rotate, and the rotating shaft 68 drives the fixed plate 66 to rotate. The fixed plate 66 drives the rotating shaft 65 at the left end of its front side to slide and rotate in the sliding mouth 67 on the frame 64, thereby driving the pillar 61 to slide and avoid along the inner wall of the guide slide groove 62, thereby driving the needle 4 on the adjusting mechanism 11 to reciprocate, and perform the operation of sewing the cloth under the needle, so as to achieve the purpose of sewing. The needle 4 is pressed down When the needle 4 needs to be adjusted, the operator presses the pressing posts 116 on both sides so that the pressing posts 116 are subjected to the pressing force and slide along the outer surface of the sliding post 115 through the sliding hole 117, and compresses the spring 114 to separate from the laterally adjacent bayonet 112, and then pulls the fixing post 111 upward or downward. However, the pressing post 116 will continue to be subjected to the squeezing force when it moves on the inner wall of the pillar 61, and at the same time, the spring 114 is kept in a compressed state. When the next bayonet 112 is encountered during the movement, the spring 114 stores energy through the stored elastic potential, applies a reverse force to make the pressing post 116 rebound, and ensures that the pressing post 116 is engaged with the corresponding bayonet 112, thereby effectively ensuring the accurate adjustment of the needle distance of the needle 4, and the action of the spring 114 makes the entire adjustment process more stable and reliable.
[0026] It is worth noting that the specific model of the single chip microcomputer 9 disclosed in the above embodiment is S7-200, and the motor 63 is recommended to be D180M-0160030B-E. The single chip microcomputer 9 controls the motor 63 to work using a method commonly used in the prior art.
[0027] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. The stitch length adjustment mechanism of the trimming overlock sewing machine is characterized by: It comprises a base (1) and a needle lowering mechanism (6); Base (1): a workbench (2) is fixedly connected to its upper surface, a avoidance groove (3) is provided at the left end of the upper surface of the workbench (2), a mounting frame (5) is fixedly connected to the right end of the upper surface of the workbench (2), and a mounting groove (10) is provided at the left end of the mounting frame (5); The needle lowering mechanism (6) comprises a support (61) and a guide slot (62), wherein the guide slot (62) is respectively arranged on the upper and lower inner walls of the mounting groove (10), a support (61) is slidably connected between the inner walls of the guide slot (62), an adjustment mechanism (11) is arranged at the bottom end of the support (61), a needle head (4) is arranged at the bottom end of the adjustment mechanism (11), and the needle head (4) corresponds to the upper and lower positions of the avoidance groove (3).
2. The stitch length adjustment mechanism of the trim overlock sewing machine according to claim 1, characterized in that: It also includes a single chip microcomputer (9), which is arranged at the right end of the front side of the mounting frame (5), and the input end of the single chip microcomputer (9) is electrically connected to an external power supply.
3. The needle distance adjustment mechanism of the trim overlock sewing machine according to claim 1, characterized in that: It also includes a rotating column (8), which is rotatably connected to the middle part of the front side of the mounting frame (5) through a pin shaft, and a rotating groove (7) is opened inside the rotating column (8).
4. The needle distance adjustment mechanism of the trim overlock sewing machine according to claim 1, characterized in that: The adjusting mechanism (11) comprises a fixed column (111), a slide groove (113), a spring (114), a slide column (115), a pressing column (116) and a slide hole (117); the fixed column (111) is slidably connected to the inner wall of the lower end of the support column (61); a needle (4) is provided at the bottom end of the fixed column (111); slide grooves (113) are respectively provided on the left and right sides of the upper end of the fixed column (111); and the inner walls of the slide grooves (113) are A sliding column (115) is fixedly connected, and a sliding hole (117) is opened inside the pressing column (116). The inner wall of the sliding hole (117) is slidably connected to the outer surface of the adjacent sliding column (115). The spring (114) is fixedly connected between one side of the pressing column (116) close to the center of the fixed column (111) and the inner wall of the adjacent sliding groove (113), and the spring (114) is sleeved on the outer surface of the sliding column (115).
5. The needle distance adjustment mechanism of the trim overlock sewing machine according to claim 4, characterized in that: The adjustment mechanism (11) further comprises a bayonet (112), wherein the bayonet (112) is provided at the lower end of the outer surface of the support column (61), and the inner wall of the bayonet (112) is engaged with the outer end of a laterally adjacent pressing column (116).
6. The stitch length adjustment mechanism of the trim overlock sewing machine according to claim 2, characterized in that: The needle lowering mechanism (6) also includes a frame (64), a rotating shaft (65), a fixed plate (66), a sliding opening (67) and a rotating shaft (68), wherein the rotating shaft (68) is rotatably connected to the rear inner wall of the mounting groove (10), the front end of the rotating shaft (68) is fixedly connected to the fixed plate (66), the left end of the front side surface of the fixed plate (66) is rotatably connected to the rotating shaft (65), the frame (64) is fixedly connected to the middle part of the pillar (61), the frame (64) is located inside the mounting groove (10), a sliding opening (67) is opened inside the frame (64), and the inside of the sliding opening (67) is slidably connected to the front end of the rotating shaft (65).
7. The needle distance adjustment mechanism of the trim overlock sewing machine according to claim 6, characterized in that: The needle lowering mechanism (6) further comprises a motor (63), which is mounted on the left end of the rear side surface of the mounting frame (5) by means of bolts, the front end of the output shaft of the motor (63) is fixedly connected to the rear end of the rotating shaft (68), and the input end of the motor (63) is electrically connected to the output end of the single chip microcomputer (9).