Seam skipping device for sewing equipment and sewing equipment
The skip stitch function of the sewing equipment is optimized by the curved needle swing shaft and dual drive mechanism, which solves the problems of high electronic control precision and mechanical wear in the existing technology, realizes non-stop skip stitching, and improves production efficiency and equipment adaptability.
Patent Information
- Application Number
- CN202422873093.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-22
AI Technical Summary
Existing sewing equipment requires high electronic control precision and heavy load on mechanical parts when achieving skip stitching, which causes rapid wear and is complicated to operate, affecting the production environment and efficiency.
The curved needle swing shaft and dual drive mechanism are adopted to realize the lateral movement and swing of the curved needle through the cylinder and transmission assembly. The sewing and skip stitch functions can be switched without stopping the sewing equipment during operation, which simplifies the structure and reduces the control accuracy requirements.
It realizes seam skipping without stopping the machine, improves production efficiency, simplifies equipment maintenance, reduces the impact on the production environment, and has good adaptability and high efficiency.
Smart Images
Figure CN223373389U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of sewing equipment, and in particular to a skip stitch device for sewing equipment and the sewing equipment. Background Art
[0002] Sewing machines primarily use thread to join layers of fabric together. With the continuous advancement of technology, there are now many different styles of sewing machines on the market. Different sewing machine models can be used to sew different fabrics.
[0003] In the sewing of some garments, precise control of the sewing process is required. For example, before the waistband of jeans is sealed, there are local sewing stitches on the waistband fabric and the main body fabric of the jeans, while other areas do not require sewing stitches. In traditional processes, manual thread removal or equipment control is generally used to achieve skipping stitches to meet this demand. In the existing technology, sewing equipment generally achieves skipping stitches by destroying the thread loops of the upper or lower thread. The main methods for destroying the thread loops of the upper thread include spindle separation technology and needle bar separation technology. During the implementation process, the machine needs to be stopped at a certain fixed position, which requires high electronic control accuracy of the motor, and the related mechanical parts are heavily loaded and wear quickly. At the same time, the related mechanical parts are relatively troublesome to replace. The thread loop of the lower thread is mainly destroyed by blowing air, which has poor stability during the implementation process and has a greater impact on the production environment and operators. Therefore, there is room for improvement in the implementation of skipping stitches in the existing technology. Utility Model Content
[0004] The present application provides a skipping seam device for sewing equipment. The skipping seam device has a simple structure, is easy to install and maintain, has little impact on the production environment, can realize skipping seams without stopping the machine, and has the advantages of good adaptability and high production efficiency.
[0005] The present application provides a skip stitch device for sewing equipment, comprising:
[0006] A looper swing shaft having a first end and a second end opposite to each other, wherein the looper swing shaft is used for mounting the looper;
[0007] A first driving mechanism is connected to the first end of the looper swing shaft and is used to drive the looper swing shaft to move laterally along its own axis;
[0008] The second driving mechanism is connected to the second end of the bending needle swing shaft, and is used to drive the bending needle swing shaft to swing along its own axis, and the second driving mechanism allows the bending needle swing shaft to move laterally.
[0009] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution. They are merely further supplements or optimizations. Under the premise that there are no technical or logical contradictions, each optional method can be combined separately for the above-mentioned overall solution, or multiple optional methods can be combined.
[0010] In one embodiment, the first driving mechanism is mounted on a frame of the sewing device in an adjustable position along the lateral direction of the looper swing axis.
[0011] In one embodiment, the lateral movement stroke of the bending needle swing axis is 2 to 5 mm.
[0012] In one embodiment, a bending needle seat is provided on the bending needle swing shaft, the bottom of the bending needle seat is slidably and positionably installed on the bending needle swing shaft, and the top of the bending needle seat provides at least two bending needle installation positions.
[0013] In one embodiment, the first driving mechanism includes:
[0014] A base, mounted on the frame;
[0015] The cylinder is installed on the base, and the piston rod of the cylinder is rotationally matched with the first end of the bending needle swing shaft and is axially limited to each other.
[0016] In one embodiment, the frame is slidably and positionably mounted with guide shafts, the guide shafts are at least two arranged side by side, and the base is fixed to the end of each guide shaft.
[0017] In one embodiment, the second driving mechanism includes:
[0018] A driving shaft is arranged parallel to the looper swing shaft;
[0019] The transmission assembly includes a plurality of components which are sequentially connected to the driving shaft and the bending needle swing shaft, at least two of which are in sliding fit, and the sliding direction is consistent with the lateral movement direction of the bending needle swing shaft.
[0020] In one embodiment, the transmission component includes:
[0021] an eccentric wheel fixed to the drive shaft;
[0022] A connecting rod, one end of which is sleeved on the eccentric wheel so as to slide along the lateral direction of the looper swing axis, and the connecting rod is also rotationally matched with the eccentric wheel;
[0023] The swing seat is fixed to the second end of the looper swing shaft and is rotationally matched with the other end of the connecting rod.
[0024] In one embodiment, a mounting hole is provided at one end of the connecting rod, a needle bearing is provided in the mounting hole, and the connecting rod is sleeved on the eccentric wheel through the needle bearing.
[0025] The present application also discloses a sewing device, comprising a machine needle and a curved needle that cooperate with each other to perform sewing, and the curved needle is driven by the skip stitch device described in the present application.
[0026] The technical solution disclosed in this application achieves the skip stitch function by optimizing the looper drive structure. This upgrade is achieved by simply adjusting several standard components on the basis of existing ordinary sewing equipment. During use, the skip stitch function can be turned on or off at any time during the operation of the sewing equipment without completely stopping the motor, thereby shortening the skip stitch time, reducing the control accuracy requirements, and improving sewing efficiency. Therefore, the skip stitch device of this application has a simple structure, is easy to install and maintain, has little impact on the production environment, can achieve skip stitch without stopping the machine, and has the advantages of good adaptability and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0028] Figure 1 This is a schematic structural diagram of a seam skipping device for sewing equipment in one embodiment of the present application;
[0029] Figure 2 for Figure 1 An enlarged schematic diagram of the second driving mechanism of the seam skipping device;
[0030] Figure 3 This is a schematic diagram of the sewing mechanism in normal operation (skip stitch function is closed);
[0031] Figure 4 This is a schematic diagram of the sewing mechanism skip stitch operation (skip stitch function is turned on);
[0032] Figure 5 This is a structural diagram of a sewing device in one embodiment of the present application.
[0033] The reference numerals of the various components are as follows:
[0034] 100, looper; 110, looper swing axis; 111, first end; 112, second end; 120, looper seat; 121, U-shaped clip;
[0035] 200, first drive mechanism; 210, base; 211, first guide shaft; 212, second guide shaft; 213, positioning member; 220, cylinder; 221, piston rod; 230, floating joint;
[0036] 300, second drive mechanism; 310, drive shaft; 320, transmission assembly; 321, eccentric wheel; 322, connecting rod; 323, swing seat; 324, rotating pin;
[0037] 400, machine needle;
[0038] 500, rack. DETAILED DESCRIPTION
[0039] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.
[0040] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.
[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.
[0042] In this application, unless otherwise clearly specified and limited, when a first feature is “above” or “below” a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, when a first feature is “above”, “above” or “above” a second feature, it can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level (or in a state of use, or from a certain perspective of the drawing) than the second feature. When a first feature is “below”, “below” or “below” a second feature, it can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level (or in a state of use, or from a certain perspective of the drawing) than the second feature.
[0043] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.
[0044] See attached Figure 1 To the attached Figure 4 In the illustrated embodiment, the present application discloses a skipping stitch device for a sewing device, comprising a looper swing shaft 110 and a first drive mechanism 200 and a second drive mechanism 300 linked to the looper swing shaft 110. The looper 100 is arranged on the looper swing shaft 110 and moves with the looper swing shaft 110. The looper swing shaft 110 has a first end 111 and a second end 112 relative to each other. The first drive mechanism 200 is connected to the first end 111 of the looper swing shaft 110, and is used to drive the looper swing shaft 110 to move laterally along its own axis. The second drive mechanism 300 is connected to the second end 112 of the looper swing shaft 110, and is used to drive the looper swing shaft 110 to swing around its own axis, and the second drive mechanism 300 allows the looper swing shaft 110 to move laterally.
[0045] The second drive mechanism 300 can enable the curved needle 100 to swing relative to the machine needle 400 of the sewing equipment to form a thread loop, thereby realizing a sewing trace. The first drive mechanism 200 can enable the curved needle 100 to avoid the machine needle 400 to avoid forming a sewing trace, thereby realizing a skip stitch. Compared with the prior art, the normal sewing operation and the skip stitch operation in this embodiment can be switched at any time during the operation of the sewing equipment. During the switching process, there is no need to completely stop the motor, and the skip stitch can be realized without stopping the machine, thereby shortening the skip stitch time, reducing the control accuracy requirements, and improving sewing efficiency. The overall structure of the skip stitch device is simple, easy to install, easy to maintain, has little impact on the production environment, good adaptability, and high production efficiency.
[0046] For details on the arrangement of the first drive mechanism 200, see the attached Figure 1 In the illustrated embodiment, the first drive mechanism 200 includes:
[0047] Base 210, mounted on frame 500;
[0048] The cylinder 220 is mounted on the base 210 , and the piston rod 221 of the cylinder 220 is rotationally matched with the first end 111 of the looper swing shaft 110 and is axially limited to each other.
[0049] The cylinder 220 can drive the bending needle swing shaft 110 to move in the axial direction, thereby realizing the movement of the bending needle relative to the machine needle 400. The piston rod 221 of the cylinder 220 and the first end 111 of the bending needle swing shaft 110 are connected by a floating joint 230. One end of the floating joint 230 is connected to the bending needle swing shaft 110 by a thread, and the other end is fixed to the piston rod 221 of the cylinder 220 by a thread. The floating joint 230 can release the radial and / or circumferential movement stroke while transmitting the axial driving force, thereby meeting the movement requirements of the bending needle swing shaft 110. The floating joint 230 can also be set as a bidirectional thrust ball bearing. The movement stroke of the cylinder 220 is 2 to 5 mm, and correspondingly, the lateral movement stroke of the bending needle swing shaft 110 is 2 to 5 mm. The cylinder 220 can be directly fixed to the frame 500 through the base 210, or it can be movably set. See the attached Figure 1 In the illustrated embodiment, the frame 500 is slidably and positionably mounted with guide shafts. The guide shafts are arranged side by side, comprising at least two guide shafts, namely a first guide shaft 211 and a second guide shaft 212. The base 210 is fixed to the ends of each guide shaft. The first guide shaft 211 and the second guide shaft 212 are eccentrically positioned relative to the looper swing shaft 110. The frame 500 is provided with guide holes that mate with the outer circumference of the guide shafts or guide posts that mate with the inner circumference of the guide shafts. Driven by the guide shafts, the first drive mechanism 200 is mounted on the frame 500 of the sewing machine in an adjustable position along the lateral direction of the looper swing shaft 110. Furthermore, radially extending positioning members 213 are provided on the guide shafts to maintain the positional relationship between the guide shafts and the frame 500. By switching the positioning members 213, the base 210 can move along the guide shafts to adjust the relative position of the looper and needle 400, thereby achieving both jump stitching and normal sewing operating parameters.
[0050] For details on the arrangement of the second drive mechanism 300, see the attached Figure 1 and attached Figure 2 In the embodiment shown, the second driving mechanism 300 includes:
[0051] The driving shaft 310 is arranged parallel to the looper swing shaft 110;
[0052] The transmission assembly 320 includes multiple components that are sequentially connected to the drive shaft 310 and the looper swing shaft 110. At least two of the components are slidably engaged, and the sliding direction is consistent with the lateral movement direction of the looper swing shaft 110. The transmission assembly 320 can transmit the circumferential driving force to achieve looper swing while releasing the axial movement of the looper swing shaft 110 through the slidably engaged components. Further, the transmission components include:
[0053] an eccentric wheel 321 fixed to the drive shaft 310;
[0054] The connecting rod 322 has one end which is slidably sleeved on the eccentric wheel 321 along the lateral movement direction of the looper swing shaft 110, and the end is also rotatably engaged with the eccentric wheel 321;
[0055] The swing seat 323 is fixed to the second end 112 of the looper swing shaft 110 and is rotatably engaged with the other end of the connecting rod 322 .
[0056] The rotational engagement between the eccentric 321 and the connecting rod 322 enables both axial sliding engagement and circumferential transmission. The swinging base 323 further adjusts the power transmission pattern. One end of the connecting rod 322 has a mounting hole, which houses a needle bearing. The needle bearing is then sleeved onto the eccentric 321. Furthermore, the connecting rod 322 has a figure-eight structure, with its ends connected to the eccentric 321 and the swinging base 323, respectively.
[0057] For details on the matching of each component, see the attached Figure 1 In the illustrated embodiment, a looper seat 120 is provided on the looper swing shaft 110, and the bottom of the looper seat 120 is slidably and positionably mounted on the looper swing shaft 110, and the top of the looper seat 120 provides at least two looper mounting positions. When a plurality of loopers are provided, a plurality of corresponding machine needles 400 are also provided and correspond to the loopers, and each looper cooperates with the corresponding machine needle 400 to achieve sewing. When performing a jump stitch operation, each looper moves relative to the corresponding looper. Each looper is fixedly connected to the looper seat 120. The looper seat 120 is connected to the looper swing shaft 110 via a U-shaped clip 121. The U-shaped clip 121 can be fixed to a specific position on the looper swing shaft 110, or it can be adjusted and fixed in the axial direction of the looper swing shaft 110. The bending needle swing shaft 110 passes through the two axial holes of the frame 500 and is fixedly connected to the swing seat 323. The swing seat 323 is connected to the mounting hole at one end of the connecting rod 322 through the rotating pin 324. A needle bearing is pressed into the mounting hole at the other end of the connecting rod 322 and then sleeved on the eccentric wheel 321. The needle bearing can move left and right relative to the eccentric wheel 321. The eccentric wheel 321 is fixed to the drive shaft 310 by screws.
[0058] The following will be combined with the attached Figure 3 and attached Figure 4 Specifically describe the working process of the seam skipping device in this application:
[0059] See attached Figure 3 As shown, the piston rod 221 of the cylinder 220 is pushed to the right in the figure, so that the gap between the looper and the needle 400 is controlled within 0 to 0.1 mm. Furthermore, the gap can be preferably 0 to 0.05 mm. In this state, the sewing device can perform normal sewing. When the drive shaft 310 rotates, the drive shaft 310 drives the eccentric wheel 321, the connecting rod 322, and the swing seat 323 to drive the looper swing shaft 110 to swing back and forth, so that the looper and needle 400 cooperate to form a sewing stitch.
[0060] See attached Figure 4 As shown, the piston of cylinder 220 retracts to the left in the figure, creating a skip stitch gap D1 between the looper and needle 400. This gap D1 is 2 to 5 mm. In the figure, it is 2.5 to 3.5 mm. In this state, the looper avoids the upper thread loop formed by needle 400, causing a skip stitch to achieve a skip stitch, thus achieving the goal of no sewing seams.
[0061] Based on the above, combined with the attached Figure 5 In addition to the embodiment shown, the present application also discloses a sewing device comprising a needle 400 and a looper that cooperate to perform sewing, the looper being driven by a skip stitch device disclosed in the present application. The specific configuration of the skip stitch device is described above, and the remaining components of the sewing device can be implemented in conjunction with existing technologies and will not be described in detail here.
[0062] The technical features of the above-described embodiments may be combined in any manner. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as no contradiction exists between these combinations of technical features, they should be considered to be within the scope of this specification. When technical features in different embodiments are embodied in the same drawing, it can be deemed that the drawing also discloses examples of combinations of the various embodiments involved.
[0063] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.
Claims
1. A skip stitch device for sewing equipment, characterized in that: include: A looper swing shaft having a first end and a second end opposite to each other, wherein the looper swing shaft is used for mounting the looper; A first driving mechanism is connected to the first end of the looper swing shaft and is used to drive the looper swing shaft to move laterally along its own axis; The second driving mechanism is connected to the second end of the bending needle swing shaft, and is used to drive the bending needle swing shaft to swing along its own axis, and the second driving mechanism allows the bending needle swing shaft to move laterally.
2. The skip stitch device for sewing equipment according to claim 1, characterized in that: The first driving mechanism is installed on the frame of the sewing equipment in an adjustable position along the lateral direction of the looper swing axis.
3. The skip stitch device for sewing equipment according to claim 1, characterized in that: The lateral movement stroke of the bending needle swing axis is 2-5 mm.
4. The skip stitch device for sewing equipment according to claim 1, characterized in that: A bending needle seat is provided on the bending needle swing shaft. The bottom of the bending needle seat is slidably and positionably installed on the bending needle swing shaft. The top of the bending needle seat provides at least two bending needle installation positions.
5. The skip stitch device for sewing equipment according to claim 2, characterized in that: The first driving mechanism comprises: a base, mounted on the frame; The cylinder is installed on the base, and the piston rod of the cylinder is rotationally matched with the first end of the bending needle swing shaft and is axially limited to each other.
6. The skip stitch device for sewing equipment according to claim 5, characterized in that: The frame is slidably and positionably mounted with guide shafts, wherein at least two guide shafts are arranged side by side, and the base is fixed to the end of each guide shaft.
7. The skip stitch device for sewing equipment according to claim 1, characterized in that: The second driving mechanism comprises: A driving shaft is arranged parallel to the looper swing shaft; The transmission assembly includes a plurality of components which are sequentially connected to the driving shaft and the bending needle swing shaft, at least two of which are in sliding fit, and the sliding direction is consistent with the lateral movement direction of the bending needle swing shaft.
8. The skip stitch device for sewing equipment according to claim 7, characterized in that: The components of the transmission assembly include: an eccentric wheel fixed to the drive shaft; A connecting rod, one end of which is sleeved on the eccentric wheel so as to slide along the lateral direction of the looper swing axis, and the connecting rod is also rotationally matched with the eccentric wheel; The swing seat is fixed to the second end of the looper swing shaft and is rotationally matched with the other end of the connecting rod.
9. The skip stitch device for sewing equipment according to claim 8, characterized in that: One end of the connecting rod is provided with a mounting hole, a needle roller bearing is provided in the mounting hole, and the connecting rod is sleeved on the eccentric wheel through the needle roller bearing.
10. A sewing device comprising a needle and a looper for cooperating to perform sewing, characterized in that: The curved needle is driven by the skipping stitch device described in any one of claims 1 to 9.