Thread pressing mechanism of multi-needle machine

Abstract

The utility model discloses a thread pressing mechanism of a multi-needle machine. The thread pressing mechanism comprises a thread pressing frame and a rapid threading assembly. A wire pressing seat is arranged in the middle of the wire pressing frame through the telescopic end of an electric-hydraulic push rod, wire guiding seats are arranged at the front end and the rear end of the wire pressing frame, and wire guiding grooves which are evenly distributed are formed in the lower sides of the wire guiding seats and the wire pressing seat; the rapid threading assembly comprises grooves, telescopic columns, plugging seats and arc-shaped chamfers, the grooves are uniformly formed in the lower sides of the wire guiding seats and the wire pressing seats, the grooves are communicated with the adjacent wire guiding grooves, the plugging seats are arranged in the grooves through the telescopic ends of the symmetrically distributed telescopic columns, and the arc-shaped chamfers are arranged in the plugging seats. According to the thread pressing mechanism of the multi-needle machine, the elastic closing opening is formed, the elastic closing opening is opened through cambered surface contact and extrusion and automatically and elastically closed, therefore, weaving threads can rapidly penetrate into the thread guide grooves of the thread pressing mechanism, operation is convenient, the thread pressing efficiency is improved, and the thread pressing mechanism is suitable for large-scale popularization and application. The influence of the diameter of the weaving thread and the fluffing of the weaving head is small.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-needle machines, in particular to a thread pressing mechanism of a multi-needle machine. Background Art

[0002] There are many types of multi-needle machines, which are widely used in decorative sewing. According to the number of needles, multi-needle machines include 3-needle, 4-needle, 6-needle, 9-needle, 12-needle, 16-needle, 21-needle, 24-needle, 25-needle, 33-needle, 38-needle and 50-needle sewing machines. After the multi-needle machine finishes sewing and before the thread is trimmed, the sewing thread is pressed down by the thread pressing mechanism to realize the function of reserving the thread length. When the seam is started again, the thread pressing group is lifted to ensure that there is enough thread length when the seam is started again. Some thread pressing mechanisms include a thread pressing frame, which is connected to a thread pressing seat through the telescopic end of the hydraulic cylinder. The thread pressing seat is provided with evenly distributed When pressing the thread of a multi-needle machine, the telescopic end of the hydraulic cylinder is driven by an external hydraulic pump to move the thread pressing seat vertically downward, and the thread is pressed through the thread groove on the thread pressing seat, thereby ensuring that the multi-needle machine has sufficient thread length when it starts sewing again. However, when this device is used, the threads need to be passed through the corresponding thread grooves respectively. Due to the large number of needles on the multi-needle machine, the diameter of the thread groove allowed within a reasonable space is smaller. If the thread used by the multi-needle machine has a large diameter and tends to be close to the diameter of the thread groove, the thread head will be fuzzy, and it will be inconvenient to connect the thread and the thread groove in series, which needs to be improved. Utility Model Content

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a thread pressing mechanism of a multi-needle machine. The device is provided with an elastic closing mouth, which is opened by arc surface contact and squeezed and automatically elastically closed, so that the weaving thread can be quickly inserted into the wire groove of the thread pressing mechanism. The operation is convenient and is less affected by the diameter of the weaving thread and the fuzzing of the weaving thread head, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a thread pressing mechanism of a multi-needle machine, comprising a thread pressing frame and a quick threading assembly;

[0005] Wire crimping frame: A wire crimping seat is provided in the middle through the telescopic end of the electro-hydraulic push rod. Wire seats are provided at both the front and rear ends of the wire crimping frame. Evenly distributed wire grooves are provided on the lower sides of the wire seats and the wire crimping seat.

[0006] Quick threading assembly: It includes a groove, a telescopic column, a blocking seat and an arc chamfer. The grooves are evenly opened on the lower side of the wire seat and the wire pressing seat. The grooves are connected to the adjacent wire grooves. The interior of the grooves is provided with a blocking seat through the telescopic end of the symmetrically distributed telescopic column. The lower end of the blocking seat is close to the edge of the center of the adjacent wire groove. The device is provided with an elastic closing mouth, which is opened by arc surface contact and automatically closed elastically, so that the wire can be quickly inserted into the wire groove of the wire pressing mechanism. It is easy to operate and is less affected by the wire diameter and the fuzzing of the wire head.

[0007] Furthermore, it also includes a single-chip microcomputer, which is located outside the wire crimping frame. The input end of the single-chip microcomputer is electrically connected to the external power supply, and the output end of the single-chip microcomputer is electrically connected to the input end of the electro-hydraulic push rod, which is convenient for controlling electrical components.

[0008] Furthermore, a laser rangefinder is provided on the upper side of the thread pressing seat, and the laser rangefinder is bidirectionally electrically connected to the single-chip microcomputer. The single-chip microcomputer controls the electro-hydraulic push rod according to the measurement results so that its telescopic end drives the thread pressing seat to move, thereby being able to accurately adjust the reserved thread length when the multi-needle machine starts sewing again.

[0009] Furthermore, the quick threading assembly also includes a spring, which is symmetrically arranged between the blocking seat and the adjacent groove. The springs are movably connected to the outer ends of the adjacent telescopic columns, and the two adjacent blocking seats are automatically closed by the compression force of the spring.

[0010] Furthermore, the interior of the wire trough and the inner arc surface of the sealing seat are both provided with evenly distributed semicircular grooves, and the interior of the semicircular grooves are rotatably connected with rotating balls. The rotating balls reduce the contact area between the thread and the wire trough, thereby reducing the sliding wear between the thread and the wire trough in the thread pressing mechanism of the multi-needle machine.

[0011] Furthermore, symmetrically distributed auxiliary guide rods are provided on the upper side of the wire pressing seat, and the upper ends of the auxiliary guide rods are slidably connected to the rectangular sliding holes inside the wire pressing frame to provide auxiliary sliding support for the vertical movement of the wire pressing seat and improve its movement stability.

[0012] Furthermore, a symmetrically distributed mounting bracket is provided at the upper left end of the thread pressing frame, which facilitates fixing the device to an appropriate mounting position on the multi-needle machine.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the thread pressing mechanism of the multi-needle machine has the following advantages:

[0014] When the thread pressing mechanism is connected to the thread in the multi-needle machine, the staff presses the two ends of the thread at a certain point, so that it enters the corresponding wire groove through the contact pressure with the arc chamfered arc surface of the blocking seat, and then the corresponding wire groove is closed and limited by the spring compression elastic blocking seat. The threading of the thread and the wire groove is achieved by pressing, which is less affected by the thread diameter and the fuzzing of the thread head. The thread pressing mechanism of the multi-needle machine and the thread threading connection operation are convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0017] Figure 3 This is an enlarged structural diagram of point A of the present invention.

[0018] In the figure: 1 wire crimping frame, 2 single-chip microcomputer, 3 electro-hydraulic push rod, 4 wire crimping seat, 5 wire seat, 6 wire groove, 7 quick threading assembly, 71 groove, 72 telescopic column, 73 spring, 74 blocking seat, 75 arc chamfer, 8 rotating ball, 9 auxiliary guide rod, 10 mounting bracket, 11 laser rangefinder. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-3 , this embodiment provides a technical solution: a thread pressing mechanism of a multi-needle machine, comprising a thread pressing frame 1 and a quick threading assembly 7;

[0021] Wire crimping frame 1: The middle part of the wire crimping frame 1 is provided with a wire crimping seat 4 through the telescopic end of the electro-hydraulic push rod 3. The front and rear ends of the wire crimping frame 1 are provided with a wire seat 5. The lower sides of the wire seat 5 and the wire crimping seat 4 are provided with evenly distributed wire grooves 6. It also includes a single-chip microcomputer 2, which is located outside the wire crimping frame 1. The input end of the single-chip microcomputer 2 is electrically connected to the external power supply, and the output end of the single-chip microcomputer 2 is electrically connected to the input end of the electro-hydraulic push rod 3. A laser rangefinder 11 is provided on the upper side of the wire crimping seat 4. The laser rangefinder 11 is bidirectionally electrically connected to the single-chip microcomputer 2. The inside of the wire groove 6 and the blocking seat The inner arc surface of 74 is provided with evenly distributed semicircular grooves, and the interior of the semicircular grooves is rotatably connected with a rotating ball 8. The upper side of the wire pressing seat 4 is provided with symmetrically distributed auxiliary guide rods 9, and the upper ends of the auxiliary guide rods 9 are slidably connected with the rectangular sliding holes inside the wire pressing frame 1. The upper left end of the wire pressing frame 1 is provided with a symmetrically distributed mounting bracket 10. When the multi-needle machine is subjected to the wire pressing operation, the device is first fixed to the appropriate installation position on the multi-needle machine with bolts through the mounting bracket 10. When the weaving thread in the multi-needle machine is subjected to the wire pressing operation, the single-chip microcomputer 2 starts the electro-hydraulic push rod 3 to make the wire pressing operation Its telescopic end drives the thread pressing seat 4 to move downward, thereby moving the thread downward to reserve enough thread length for the multi-needle machine to sew again. During this process, the single-chip microcomputer 2 starts the laser rangefinder 11, and the laser rangefinder 11 emits a light signal to the top wall of the thread pressing frame 1 and reflects it back to the initial position. The distance between the laser rangefinder 11 and the top wall of the thread pressing frame 1 is measured by the propagation speed and time of the light signal. The laser rangefinder 11 transmits the measured result to the single-chip microcomputer 2 in the form of an electrical signal. The single-chip microcomputer 2 controls the electro-hydraulic push rod 3 according to the measurement result so that its telescopic end drives The thread pressing seat 4 moves, so that the reserved thread length when the multi-needle machine starts sewing again can be accurately adjusted, and it is easy to use. During the vertical movement of the thread pressing seat 4, the auxiliary guide rod 9 slides adaptively along the corresponding rectangular slide hole, thereby providing auxiliary sliding support for the vertical movement of the thread pressing seat 4, thereby improving its movement stability. When the thread passes through the thread groove of the thread pressing mechanism of the multi-needle machine, it contacts the rotating ball 8, and the rotating ball 8 rotates adaptively around the corresponding semicircular groove, thereby reducing the contact area between the thread and the thread groove through the rotating ball 8, thereby reducing the sliding wear between the thread and the thread groove;

[0022] The quick threading assembly 7 includes a groove 71, a telescopic column 72, a blocking seat 74 and an arc chamfer 75. The grooves 71 are evenly arranged on the lower side of the wire seat 5 and the wire pressing seat 4. The grooves 71 are connected to the adjacent wire grooves 6. The interior of the grooves 71 is provided with a blocking seat 74 through the telescopic end of the symmetrically distributed telescopic column 72. The lower end of the blocking seat 74 is close to the edge of the center of the adjacent wire groove 6. An arc chamfer 75 is provided. The quick threading assembly 7 also includes a spring 73. The springs 73 are symmetrically arranged between the blocking seat 74 and the adjacent grooves 71. The springs 73 are movably connected to the outer ends of the adjacent telescopic columns 72. The staff passes the weaving thread of the multi-needle machine from front to back in sequence through the longitudinally adjacent wire grooves 6. During this process, the staff holds the two ends of the weaving thread and presses it downward and upward to the two laterally adjacent blocking seats 7 The lock hole 71 is fixed with the locking cam 74 at the top and the locking cam 76 is fixed with the locking cam 76 to lock the locking cam 76. When the lock hole 71 is unlocked, the lock hole 72 is unlocked, and the winch cam 72 is unlocked.

[0023] The working principle of the thread pressing mechanism of a multi-needle machine provided by the present invention is as follows: when the thread pressing operation is performed on the multi-needle machine, the device is first fixed to the appropriate installation position on the multi-needle machine with bolts through the mounting frame 10, and then the staff passes the weaving thread of the multi-needle machine from front to back in sequence through the longitudinally adjacent wire grooves 6. During this process, the staff holds the two ends of the weaving thread at one point and presses it downward and upward to between the two laterally adjacent blocking seats 74. The weaving thread itself slides along the arc surface of the arc chamfer 75, and the contact pressure causes the blocking seat 74 to move toward the corresponding groove. The two sealing seats 74 are reset by the compression force of the spring 73, thereby blocking the wire groove 6 and preventing the wire from moving out along the gap of the wire groove 6 in the later stage. When the wire in the multi-needle machine is pressed, the single chip microcomputer 2 is started. The electro-hydraulic push rod 3 causes its telescopic end to drive the thread pressing seat 4 to move downward, thereby moving the thread downward to reserve sufficient thread length for the multi-needle machine to sew again. During this process, the single-chip microcomputer 2 starts the laser rangefinder 11. The laser rangefinder 11 emits a light signal to illuminate the top wall of the thread pressing frame 1 and reflects it back to the initial position. The distance between the laser rangefinder 11 and the top wall of the thread pressing frame 1 is measured by the propagation speed and time of the light signal. The laser rangefinder 11 transmits the measured result to the single-chip microcomputer 2 in the form of an electrical signal. The single-chip microcomputer 2 controls the electro-hydraulic push rod 3 to extend and retract according to the measurement result. The end drives the thread pressing seat 4 to move, so that the reserved thread length can be accurately adjusted when the multi-needle machine starts sewing again. It is easy to use. During the vertical movement of the thread pressing seat 4, the auxiliary guide rod 9 adaptively slides along the corresponding rectangular slide hole, thereby providing auxiliary sliding support for the vertical movement of the thread pressing seat 4, improving its movement stability. When the thread passes through the wire groove of the thread pressing mechanism of the multi-needle machine, it contacts the rotating ball 8, and the rotating ball 8 adaptively rotates around the corresponding semicircular groove. The contact area between the thread and the wire groove is reduced by the rotating ball 8, thereby reducing the sliding wear between the thread and the wire groove.

[0024] It is worth noting that the single chip microcomputer 2 disclosed in the above embodiment can adopt MSP430, the electro-hydraulic push rod 3 can adopt DYZW integral straight micro electro-hydraulic push rod, and the laser rangefinder 11 can adopt WH-LRF laser rangefinder. The single chip microcomputer 2 controls the operation of the electro-hydraulic push rod 3 and the laser rangefinder 11 using methods commonly used in the prior art.

[0025] The above description is merely 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 description 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. A thread pressing mechanism for a multi-needle machine, characterized in that: It comprises a wire pressing frame (1) and a quick wire threading assembly (7); A wire pressing frame (1): a wire pressing seat (4) is provided in the middle thereof through the telescopic end of an electro-hydraulic push rod (3); a wire seat (5) is provided at both the front and rear ends of the wire pressing frame (1); and evenly distributed wire grooves (6) are provided on the lower sides of the wire seat (5) and the wire pressing seat (4); The quick threading assembly (7) comprises a groove (71), a telescopic column (72), a blocking seat (74) and an arc chamfer (75), wherein the groove (71) is evenly arranged on the lower side of the wire seat (5) and the wire pressing seat (4), the grooves (71) are connected with the adjacent wire grooves (6), the interior of the grooves (71) is provided with a blocking seat (74) through the telescopic ends of the symmetrically distributed telescopic columns (72), and the lower end of the blocking seat (74) is provided with an arc chamfer (75) at the edge close to the center of the adjacent wire groove (6).

2. The thread pressing mechanism of a multi-needle machine according to claim 1, characterized in that: The invention also includes a single chip microcomputer (2), which is located outside the wire crimping frame (1), an input end of the single chip microcomputer (2) is electrically connected to an external power supply, and an output end of the single chip microcomputer (2) is electrically connected to an input end of an electro-hydraulic push rod (3).

3. The thread pressing mechanism of a multi-needle machine according to claim 2, characterized in that: A laser rangefinder (11) is provided on the upper side of the wire pressing seat (4), and the laser rangefinder (11) is bidirectionally electrically connected to the single-chip microcomputer (2).

4. The thread pressing mechanism of a multi-needle machine according to claim 1, characterized in that: The quick threading assembly (7) further comprises a spring (73), which is symmetrically arranged between the blocking seat (74) and the adjacent groove (71), and the spring (73) is movably sleeved with the outer end of the adjacent telescopic column (72).

5. The thread pressing mechanism of a multi-needle machine according to claim 1, characterized in that: The interior of the wire groove (6) and the inner arc surface of the blocking seat (74) are both provided with evenly distributed semicircular grooves, and the interiors of the semicircular grooves are rotatably connected with rotating balls (8).

6. The thread pressing mechanism of a multi-needle machine according to claim 1, characterized in that: Auxiliary guide rods (9) are symmetrically distributed on the upper side of the wire pressing seat (4), and the upper ends of the auxiliary guide rods (9) are slidably connected to the rectangular sliding holes inside the wire pressing frame (1).

7. The thread pressing mechanism of a multi-needle machine according to claim 1, characterized in that: A symmetrically distributed mounting frame (10) is provided at the upper left end of the wire pressing frame (1).

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