Needle mounting structure for sewing machine
By improving the needle holder structure, staggering the pinhole position and arranging at the Y-direction angle, the problem of excessively large needle installation spacing is solved, and the needle center spacing of less than 3mm and sewing spacing of more than 1.8mm is achieved, which improves the sewing efficiency.
Patent Information
- Application Number
- CN202420110399.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-17
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-01-17
AI Technical Summary
In existing double-needle sewing machines, the installation spacing of the needles is too large to meet the demand for sewing spacing less than 6mm, resulting in a reduced sewing efficiency.
By improving the needle holder structure, the first pin hole and the second pin hole are arranged at a first angle in the Y direction, and the position is staggered to reduce the installation distance of the needle and ensure mechanical strength.
The double-line one-time sewing with a center spacing of less than or equal to 3mm and a sewing spacing of more than 1.8mm is achieved, which improves the sewing efficiency.
Smart Images
Figure CN222160620U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a double-needle sewing machine, in particular to a needle mounting structure for the sewing machine. Background Art
[0002] The invention patent No. 201110270688.1 discloses a needle bar and a switching mechanism of a double-needle sewing machine, wherein the needle bar comprises a hollow needle bar body, the lower end of which is fixedly connected to a needle bar head for mounting a machine needle, a return spring, a first wedge block, a second wedge block and a switching pressure rod are sequentially installed in the needle bar body, the upper end of the switching pressure rod is exposed from the needle bar body, the tip of the first wedge block faces downward, and the tip of the second wedge block faces upward, a first through hole is opened on the side wall of the needle bar body at a position corresponding to the first wedge block, and a first slider is arranged in the first through hole; a second through hole is opened on the side wall of the needle bar body at a position corresponding to the second wedge block, and a second slider is arranged in the second through hole. The needle bar switching mechanism comprises a needle bar, a needle bar frame, a needle bar sleeve, a needle bar driving mechanism and a switching pressure block, the needle bar sleeve is connected to the needle bar driving mechanism, and the needle bar frame is also connected to the translation device. In the prior art, the two needles installed on the double needle bar have the center lines of the two needles parallel or perpendicular to the center line of the upper shaft, which is convenient for sewing double rows of stitches on the sewing material. However, since the two needle bars of the double needle bar are independently movable, the needles need to be independently installed on the needle seats at the lower ends of the corresponding needle bars. Since the two needle bars need to work separately, the two needle seats need to ensure a certain gap to avoid interference. Therefore, the spacing between the two needles in the existing structure is generally greater than 6mm. In sewing operations, sometimes it is necessary to sew double rows of stitches with a spacing of less than 6mm, or even a spacing of 1.8mm. Since the spacing between the two needles is too large, it cannot meet the requirement of completing the sewing of the double needles in one go, which reduces the sewing efficiency. Summary of the invention
[0003] In view of the above-mentioned existing technical status, the utility model provides a needle installation structure for a sewing machine, which reduces the installation distance between two needles by improving the needle seat structure.
[0004] The technical solution adopted by the utility model to solve the above technical problems is: a needle installation structure for a sewing machine, comprising a double needle bar assembly consisting of a first needle bar and a second needle bar, wherein the lower end of the first needle bar is connected to a first needle clamp seat, and the lower end surface of the first needle clamp seat is formed with a first needle hole for installing a first needle. The lower end of the second needle bar is connected to a second needle clamp seat, and the lower end surface of the second needle clamp seat is formed with a second needle hole for installing a second needle. The connecting line of the first needle hole and the second needle hole is arranged at a first angle with respect to the Y direction of the sewing machine.
[0005] In order to optimize the above technical solution, the utility model also includes the following improved technical solution.
[0006] The first needle clamp seat has a first side wall adjacent to the second needle clamp seat, and the second needle clamp seat has a second side wall adjacent to the first needle clamp seat. The first side wall is parallel to the second side wall, and a gap is provided between the first side wall and the second side wall. The plane where the first side wall is located and the plane where the second side wall is located are arranged at a second angle to the Y direction of the sewing machine.
[0007] The first pinhole is arranged close to the first side wall. The second pinhole is arranged close to the second side wall.
[0008] The distance between the first pinhole and the first side wall is less than or equal to 0.2 mm. The distance between the second pinhole and the second side wall is less than or equal to 0.2 mm.
[0009] The first angle between the connecting line of the first needle hole and the second needle hole and the Y direction of the sewing machine is in the range of 35 degrees to 55 degrees.
[0010] The distance between the center of the first needle and the center of the second needle is less than or equal to 3 mm.
[0011] Compared with the prior art, in the needle mounting structure of the utility model, the line connecting the first needle hole and the second needle hole is arranged at a first angle to the Y direction of the sewing machine. By staggering the positions of the first needle hole and the second needle hole, the distance between the projections of the first needle and the second needle in the Y direction of the sewing machine can be reduced while ensuring mechanical strength. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model.
[0013] Figure 2 yes Figure 1 Schematic diagram of the local structure.
[0014] Figure 3 yes Figure 2 Schematic diagram of the bottom structure. Implementation
[0015] The embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings.
[0016] Figures 1 to 3 Shown is a schematic structural diagram of the utility model.
[0017] The accompanying drawings are marked as follows: first needle bar 1, second needle bar 2, first needle clamp seat 3, first side wall 31, second needle clamp seat 4, second side wall 41, first machine needle 5, second machine needle 6, first angle 7.
[0018] The needle mounting structure for a sewing machine of the utility model comprises a double needle bar assembly consisting of a first needle bar 1 and a second needle bar 2. The double needle bar assembly is a prior art, the first needle bar 1 and the second needle bar 2 can be raised and lowered independently, and a sliding drive mechanism for switching the working states of the two needle bars is provided.
[0019] The lower end of the first needle bar 1 is connected to the first needle clamp seat 3, and the lower end surface of the first needle clamp seat 3 is formed with a first needle hole for installing the first needle 5. The lower end of the second needle bar 2 is connected to the second needle clamp seat 4, and the lower end surface of the second needle clamp seat 4 is formed with a second needle hole for installing the second needle 6. In the prior art, since there is a gap between the first needle clamp seat 3 and the second needle clamp seat 4 to avoid interference, and the gap between the first needle hole and the side wall of the first needle clamp seat 3 and the gap between the second needle hole and the second needle clamp seat 4 cannot be too thin, the distance between the center of the first needle 5 and the center of the second needle 6 is generally greater than 6mm. In many sewing operations, it is necessary to sew double threads with a minimum spacing of 1.8mm. Since the double needle spacing in the prior art is too large, the spacing cannot be reduced to ensure mechanical strength, and double threads with a spacing less than 6mm cannot be directly sewn. The double threads can only be sewn separately, which affects the sewing efficiency.
[0020] The needle installation structure for a sewing machine of the utility model staggers the first needle hole position and the second needle hole position, and the connecting line of the first needle hole and the second needle hole is arranged with the sewing machine Y direction at a first angle 7. In this embodiment, the sewing machine Y direction is shown in the figure, which is the centerline direction of the sewing machine main shaft.
[0021] The first needle clamp seat 3 has a first side wall 31 adjacent to the second needle clamp seat 4, and the second needle clamp seat 4 has a second side wall 41 adjacent to the first needle clamp seat 3. The first side wall 31 is parallel to the second side wall 41, and a gap is provided between the first side wall 31 and the second side wall 41 to avoid interference. The plane where the first side wall 31 is located and the plane where the second side wall 41 is located are arranged at a second angle to the Y direction of the sewing machine.
[0022] The first needle hole is arranged near the first side wall 31; the second needle hole is arranged near the second side wall 41. The distance between the first needle hole and the first side wall 31 is less than or equal to 0.2 mm; the distance between the second needle hole and the second side wall 41 is less than or equal to 0.2 mm. The smaller the distance between the two, the better. However, in order to ensure the mechanical strength of the needle when it is working after the needle is installed, the distance between the two should be greater than 0.1 mm.
[0023] The first angle 7 between the line connecting the first needle hole and the second needle hole and the Y direction of the sewing machine is in the range of 35 degrees to 55 degrees, preferably in the range of 40 degrees to 45 degrees.
[0024] In the needle installation structure of this embodiment, the distance between the center of the first needle 5 and the center of the second needle 6 can be less than or equal to 3mm. Under the premise of ensuring mechanical strength, the minimum distance between the projection line of the first needle 5 in the Y direction of the sewing machine and the projection line of the second needle 6 in the Y direction of the sewing machine can be 1.8mm, realizing double-thread one-time sewing with a distance of more than 1.8mm.
[0025] The best embodiment of the present invention has been explained, and various changes or modifications made by ordinary technicians in this field will not depart from the scope of the present invention.
Claims
1. A needle mounting structure for a sewing machine, comprising a double needle bar assembly consisting of a first needle bar (1) and a second needle bar (2), wherein: The lower end of the first needle bar (1) is connected to a first needle clamp seat (3), and the lower end surface of the first needle clamp seat (3) is provided with a first needle hole for mounting a first machine needle (5); the lower end of the second needle bar (2) is connected to a second needle clamp seat (4), and the lower end surface of the second needle clamp seat (4) is provided with a second needle hole for mounting a second machine needle (6); the connecting line of the first needle hole and the second needle hole is arranged at a first angle (7) with respect to the Y direction of the sewing machine.
2. The needle mounting structure according to claim 1 is characterized in that: The first needle clamp seat (3) has a first side wall (31) adjacent to the second needle clamp seat (4), and the second needle clamp seat (4) has a second side wall (41) adjacent to the first needle clamp seat (3); the first side wall (31) is parallel to the second side wall (41), and a gap is provided between the first side wall (31) and the second side wall (41); the plane where the first side wall (31) is located and the plane where the second side wall (41) is located are respectively arranged at a second angle to the Y direction of the sewing machine.
3. The needle mounting structure according to claim 2 is characterized in that: The first pinhole is arranged close to the first side wall (31); and the second pinhole is arranged close to the second side wall (41).
4. The needle mounting structure according to claim 3 is characterized in that: The distance between the first pinhole and the first side wall (31) is less than or equal to 0.2 mm; and the distance between the second pinhole and the second side wall (41) is less than or equal to 0.2 mm.
5. The needle mounting structure according to claim 1 is characterized in that: The first angle (7) between the line connecting the first needle hole and the second needle hole and the Y direction of the sewing machine ranges from 35 degrees to 55 degrees.
6. The needle mounting structure according to claim 5 is characterized in that: The distance between the center of the first needle (5) and the center of the second needle (6) is less than or equal to 3 mm.