Tape seaming machine slide rod transmission mechanism and tape seaming machine

Abstract

The application relates to a slide rod transmission mechanism of a flat seaming machine and the flat seaming machine. The slide rod transmission mechanism of the flat seaming machine comprises a slide rod, a curved needle shaft, a first transmission rod assembly and a push plate. The push plate is sleeved on the slide rod. Two stop blocks are fixedly installed on the slide rod and are located on the two sides of the push plate. A thrust bearing is arranged between each stop block and the push plate. The two sides of the thrust bearing are attached to the stop block and the push plate. One end of the first transmission rod assembly is fixedly connected to the curved needle shaft, and the other end is hingedly connected to the push plate. The curved needle shaft can swing around its own axis and drive the push plate to reciprocate along the slide rod through the first transmission rod assembly. The slide rod transmission mechanism of the flat seaming machine is beneficial to reducing the friction between the push plate and the stop block and slowing down the wear problem of the slide rod transmission mechanism of the flat seaming machine caused by long-term use.

Description

Technical Field

[0001] This application relates to the field of cover-up sewing machine technology, and in particular to a slide bar transmission mechanism and a cover-up sewing machine. Background Technology

[0002] A coverstitch machine is an industrial sewing machine that uses both needle and shuttle threads to create a single-sided overlay chain stitch on the underside of the fabric, or to add an overlay thread on the front side of the fabric to create a double-sided overlay chain stitch, thus sewing together two or more layers of fabric. The slide bar drive mechanism is the component in the coverstitch machine used to drive the looper's oscillation. The slide bar drive mechanism includes a slide bar with two fixed stops. A oscillating looper shaft is located on the side of the crossbar. The looper shaft is connected to a push plate via a crank, and the push plate is positioned between the two stops. As the looper shaft oscillates, the push plate, in conjunction with the two stops, pushes the slide bar to move left and right along its own axis.

[0003] However, when the push plate and the two stops on the slide rod work together to push the slide rod to move left and right along its own axis, sliding friction will occur between the push plate and the stop on its left or right side. Long-term use will easily cause wear and tear, and further lead to gaps between the push plate and the stops and increased noise, affecting the performance of the cover-stitch machine. Utility Model Content

[0004] Therefore, it is necessary to provide a sliding rod transmission mechanism for a coverstitch machine to solve the problem that long-term use between the push plate and the stop block on its left or right side can easily cause wear, thus affecting the performance of the coverstitch machine.

[0005] A sliding rod transmission mechanism for a coverstitch sewing machine includes a sliding rod, a bend needle shaft, a first transmission rod assembly, and a push plate. The push plate is sleeved on the sliding rod, and two stops are fixedly installed on the sliding rod, with the two stops located on opposite sides of the push plate. A thrust bearing is installed between each stop and the push plate, with the two sides of the thrust bearing respectively abutting the stop and the push plate. One end of the first transmission rod assembly is fixedly connected to the bend needle shaft, and the other end is hinged to the push plate. The bend needle shaft can swing around its own axis and drive the push plate to reciprocate along the sliding rod via the first transmission rod assembly.

[0006] In one embodiment, the first transmission rod assembly includes a swing crank and a swing connecting rod. One end of the swing crank is fixedly connected to a bent needle shaft, and the other end is hinged to the swing connecting rod. The end of the swing connecting rod away from the swing crank is hinged to a push plate.

[0007] In one embodiment, the first transmission rod assembly further includes a first pin, the swing link is provided with a first U-shaped groove, the side wall of the first U-shaped groove is provided with a first mounting hole, the end of the push plate is installed in the first U-shaped groove, and a second mounting hole is provided corresponding to the first mounting hole, and the first pin is rotatably installed in the first mounting hole and the second mounting hole.

[0008] In one embodiment, the first transmission rod assembly further includes a second pin, the swing link has a second U-shaped groove, the side wall of the second U-shaped groove has a third mounting hole, the end of the swing crank is installed in the second U-shaped groove, and a fourth mounting hole is provided corresponding to the third mounting hole, and the second pin is rotatably installed in the third mounting hole and the fourth mounting hole.

[0009] In one embodiment, the slide bar transmission mechanism of the coverstitch machine further includes a second transmission rod assembly and a main shaft. The main shaft is used to connect to the power mechanism and rotate under the drive of the power mechanism. The second transmission rod assembly connects the main shaft and the looper shaft. As the main shaft rotates, the second transmission rod assembly drives the looper shaft to swing.

[0010] In one embodiment, the second transmission rod assembly includes a bent needle connecting rod and a bent needle crank. One end of the bent needle crank is fixedly connected to the bent needle shaft, and the other end is provided with a ball head. The main shaft is provided with an eccentric ball. One end of the bent needle connecting rod is hinged to the eccentric ball, and the other end is hinged to the ball head.

[0011] In one embodiment, the thrust bearing includes a housing ring, a shaft ring, and rolling elements located between the housing ring and the shaft ring.

[0012] In one embodiment, the slide bar transmission mechanism of the coverlock sewing machine further includes a slide bar frame, through which the slide bar is movably mounted. A guide groove is provided on the slide bar frame, which extends along the axial direction of the slide bar. A stop block is provided with a locking part, which is slidably locked in the guide groove.

[0013] In one embodiment, the slide bar transmission mechanism of the overlock sewing machine further includes two slide bar sleeves, which are movably sleeved on the outer periphery of the slide bar and are located at both ends of the slide bar frame.

[0014] A cover-up sewing machine, comprising the cover-up sewing machine slide transmission mechanism described in any of the above embodiments.

[0015] Compared with the prior art, the coverlock sewing machine slide transmission mechanism and coverlock sewing machine provided in this application, by installing a thrust bearing between each stop and push plate, with the two sides of the thrust bearing respectively attached to the stop and the push plate, can withstand the axial force between the push plate and the stop and can convert the sliding friction between the push plate and the stop into rolling friction, thereby helping to reduce the friction between the push plate and the stop and alleviate the wear problem caused by long-term use of the coverlock sewing machine slide transmission mechanism, thus helping to avoid the generation of gaps and increased noise between the push plate and the stop, and helping to maintain the performance of the coverlock sewing machine. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A side view of the slide bar transmission mechanism of the overlock sewing machine provided in this application;

[0018] Figure 2 for Figure 1 An enlarged view at point A;

[0019] Figure 3 An isometric view of the slide bar transmission mechanism of the overlock sewing machine provided in this application;

[0020] Figure 4 An exploded view of the first transmission rod assembly provided in this application;

[0021] Figure 5 An exploded view of the main shaft and second transmission rod assembly provided in this application.

[0022] Reference numerals: 100, Coverstitching machine slide bar transmission mechanism; 110, slide bar; 112, stop block; 1121, locking part; 113, thrust bearing; 120, looper shaft; 130, first transmission rod assembly; 131, swing crank; 1311, fourth mounting hole; 132, swing connecting rod; 1321, first U-groove; 1322, second U-groove; 1323, first mounting hole; 1234, third mounting hole; 133, first pin; 134, second pin; 140, push plate; 141, second mounting hole; 150, slide bar frame; 151, guide groove; 160, second transmission rod assembly; 161, looper connecting rod; 162, looper crank; 1621, ball head; 170, main shaft; 171, eccentric ball; 180, slide bar sleeve. Detailed Implementation

[0023] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0025] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0028] Please see Figures 1 to 2This application provides a slide bar transmission mechanism 100 for a coverstitch sewing machine. The slide bar transmission mechanism 100 includes a slide bar 110, a bend needle shaft 120, a first transmission rod assembly 130, and a push plate 140. The push plate 140 is sleeved on the slide bar 110. Two stops 112 are fixedly installed on the slide bar 110, and the two stops 112 are respectively located on both sides of the push plate 140. A thrust bearing 113 is installed between each stop 112 and the push plate 140. The two sides of the thrust bearing 113 are respectively attached to the stop 112 and the push plate 140. One end of the first transmission rod assembly 130 is fixedly connected to the bend needle shaft, and the other end is hinged to the push plate 140. The bend needle shaft 120 can swing around its own axis and drive the push plate 140 to reciprocate along the slide bar 110 through the first transmission rod assembly 130.

[0029] It should be noted that the thrust bearing 113 is a rolling bearing specifically designed to withstand axial loads. By installing a thrust bearing 113 between each stop 112 and the push plate 140, with the two sides of the thrust bearing 113 respectively attached to the stop 112 and the push plate 140, the thrust bearing 113 can withstand the axial force between the push plate 140 and the stop 112, and can convert the sliding friction between the push plate 140 and the stop 112 into rolling friction. This helps to reduce the friction between the push plate 140 and the stop 112, and slows down the wear problem caused by long-term use of the sliding rod transmission mechanism of the overlock sewing machine. This helps to avoid the gap between the push plate and the stop and the increase in noise, and helps to maintain the performance of the overlock sewing machine.

[0030] Specifically, the thrust bearing 113 includes a housing ring, a shaft ring, and rolling elements located between the housing ring and the shaft ring. One of the housing ring and the shaft ring is used to engage with the stop 112, and the other is used to engage with the stop 112. The rolling elements are located between the housing rings and are used to achieve rolling friction.

[0031] In one embodiment, such as Figure 4As shown, the first transmission rod assembly 130 includes a swing crank 131 and a swing connecting rod 132. One end of the swing crank 131 is fixedly connected to the bend shaft 120, and the other end is hinged to the swing connecting rod 132. The end of the swing connecting rod 132 away from the swing crank 131 is hinged to the push plate 140. In related structures, it is common to use a method where one end of the swing crank 131 is fixedly connected to the bend shaft 120, and the other end is directly hinged to the push plate 140. This causes the swing of the bend shaft 120 and the swing crank 131 to be directly converted into the movement between the push plate 140. This can lead to impact vibration due to the abrupt change in angle between the push plate 140 and the swing crank 131. By adding a swing link 132, and with both ends of the swing link 132 hinged to the swing crank 131 and the push plate 140 respectively, the swing link 132 acts as a buffer between the swing crank 131 and the push plate 140, which can smooth the motion trajectory and convert the swing of the swing crank 131 into the linear motion of the push plate 140 more evenly, thereby making the operation of the push plate 140 and the slide bar 110 more stable.

[0032] Furthermore, in one embodiment, the first transmission rod assembly 130 further includes a first pin 133, the swing link 132 is provided with a first U-shaped groove 1321, the side wall of the first U-shaped groove 1321 is provided with a first mounting hole 1323, the end of the push plate 140 is installed in the first U-shaped groove 1321, and a second mounting hole 141 is provided corresponding to the first mounting hole 1323. The first pin 133 is rotatably mounted in the first mounting hole 1323 and the second mounting hole 141. It can be understood that by providing the first pin 133 and the first U-shaped groove 1321 in the swing link 132, the first pin 133 and the swing link 132 can maintain surface contact and rolling friction, thereby helping to reduce wear between the first pin 133 and the swing link 132.

[0033] Furthermore, the first transmission rod assembly 130 also includes a second pin 134, a swing link 132 having a second U-shaped groove 1322, a third mounting hole 1234 on the side wall of the second U-shaped groove 1322, an end of the swing crank 131 being mounted in the second U-shaped groove 1322, and a fourth mounting hole 1311 corresponding to the third mounting hole 1234, the second pin 134 being rotatably mounted in the third mounting hole 1234 and the fourth mounting hole 1311. It can be understood that by providing the second pin 134 and providing the second U-shaped groove 1322 in the swing link 132, the second pin 134 and the swing link 132 can maintain surface contact and rolling friction, thereby helping to reduce wear between the second pin 134 and the swing link 132.

[0034] In one embodiment, such as Figure 3 and Figure 5As shown, the slide bar transmission mechanism 100 of the coverstitch machine also includes a second transmission rod assembly 160 and a main shaft 170. The main shaft 170 is used to connect to the power mechanism and rotate under the drive of the power mechanism. The second transmission rod assembly 160 connects the main shaft 170 and the looper shaft 120. As the main shaft 170 rotates, the second transmission rod assembly 160 drives the looper shaft 120 to swing.

[0035] Specifically, the main shaft 170 is arranged parallel to the slide bar 110 in space, and the bent needle shaft 120 is located on the side of the slide bar 110 and is perpendicular to the slide bar 110.

[0036] Furthermore, the second transmission rod assembly 160 includes a bent needle connecting rod 161 and a bent needle crank 162. One end of the bent needle crank 162 is fixedly connected to the bent needle shaft 120, and the other end is provided with a ball head 1621. The main shaft 170 is provided with an eccentric ball 171. One end of the bent needle connecting rod 161 is hinged to the eccentric ball 171, and the other end is hinged to the ball head 1621. It can be understood that as the main shaft 170 rotates, the main shaft 170 drives the bent needle shaft 120 to swing through the bent needle connecting rod 161 and the bent needle crank 162.

[0037] In one embodiment, such as Figure 1 and Figure 5 As shown, the sliding rod transmission mechanism of the coverstitch sewing machine also includes a sliding rod frame 150, through which the sliding rod 110 is movably mounted. A guide groove 151 is provided on the sliding rod frame 150, extending axially along the sliding rod 110. A stop block 112 has a locking part 1121, which slidably engages with the guide groove 151. It can be understood that the sliding engagement of the locking part 1121 with the guide groove 151 guides the stop block 112, thus facilitating the smoother left-right movement of the sliding rod 110 along its own axis.

[0038] The coverlock sewing machine's slide rod transmission mechanism also includes two slide rod sleeves 180, which are movably fitted around the outer periphery of the slide rod and are located at both ends of the slide rod frame 150. The slide rod 110 passes through the slide rod sleeves 180 and the slide rod frame 150.

[0039] The working principle of the slide bar transmission mechanism 100 of the overlock sewing machine provided in this application is as follows: When the main shaft 170 rotates, the main shaft 170 drives the bending needle connecting rod 161 to move. The movement of the bending needle connecting rod 161 is transmitted to the bending needle crank 162. The bending needle crank 162 swings and drives the swing crank 131 to swing back and forth. The swing crank 131 pushes the swing connecting rod 132. The swing connecting rod 132 drives the push plate 140 to move. The push plate 140 drives the slide bar 110 to move back and forth along the axial direction through the corresponding thrust bearing 113 and the stop block 112.

[0040] This application also provides a cover-up sewing machine, which includes the cover-up sewing machine slide transmission mechanism 100 described in any of the above embodiments.

[0041] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0042] The embodiments described above are merely illustrative of several implementation methods of this application, and 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 those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A sliding rod transmission mechanism for a coverstitch sewing machine, characterized in that, The coverlock sewing machine slide rod transmission mechanism includes a slide rod (110), a bending needle shaft (120), a first transmission rod assembly (130), and a push plate (140). The push plate (140) is sleeved on the slide rod (110). Two stops (112) are fixedly installed on the slide rod (110), and the two stops (112) are respectively located on both sides of the push plate (140). A thrust bearing (113) is installed between each stop (112) and the push plate (140). The two sides of the thrust bearing (113) are respectively attached to the stop (112) and the push plate (140). One end of the first transmission rod assembly (130) is fixedly connected to the bent needle shaft (120), and the other end is hinged to the push plate (140). The bent needle shaft (120) can swing around its own axis and drive the push plate (140) to reciprocate along the slide rod (110) through the first transmission rod assembly (130).

2. The sliding rod transmission mechanism of the overlock sewing machine according to claim 1, characterized in that, The first transmission rod assembly (130) includes a swing crank (131) and a swing connecting rod (132). One end of the swing crank (131) is fixedly connected to the bent needle shaft (120), and the other end is hinged to the swing connecting rod (132). The end of the swing connecting rod (132) away from the swing crank (131) is hinged to the push plate (140).

3. The sliding rod transmission mechanism of the overlock sewing machine according to claim 2, characterized in that, The first transmission rod assembly (130) further includes a first pin (133), the swing connecting rod (132) is provided with a first U-shaped groove (1321), the side wall of the first U-shaped groove (1321) is provided with a first mounting hole (1323), the end of the push plate (140) is installed in the first U-shaped groove (1321), and a second mounting hole (141) is provided corresponding to the first mounting hole (1323), and the first pin (133) is rotatably installed in the first mounting hole (1323) and the second mounting hole (141).

4. The sliding rod transmission mechanism of the overlock sewing machine according to claim 3, characterized in that, The first transmission rod assembly (130) further includes a second pin (134), the swing connecting rod (132) is provided with a second U-shaped groove (1322), the side wall of the second U-shaped groove (1322) is provided with a third mounting hole (1234), the end of the swing crank (131) is installed in the second U-shaped groove (1322), and a fourth mounting hole (1311) is provided corresponding to the third mounting hole (1234), and the second pin (134) is rotatably installed in the third mounting hole (1234) and the fourth mounting hole (1311).

5. The sliding rod transmission mechanism of the overlock sewing machine according to claim 1, characterized in that, The coverlock sewing machine slide rod transmission mechanism also includes a second transmission rod assembly (160) and a main shaft (170). The main shaft (170) is used to connect to the power mechanism and rotate under the drive of the power mechanism. The second transmission rod assembly (160) connects the main shaft (170) and the looper shaft (120). Furthermore, as the main shaft (170) rotates, the second transmission rod assembly (160) drives the bent needle shaft (120) to swing.

6. The sliding rod transmission mechanism of the overlock sewing machine according to claim 5, characterized in that, The second transmission rod assembly (160) includes a bent needle connecting rod (161) and a bent needle crank (162). One end of the bent needle crank (162) is fixedly connected to the bent needle shaft (120), and the other end is provided with a ball head (1621). The main shaft (170) is provided with an eccentric ball (171). One end of the bent needle connecting rod (161) is hinged to the eccentric ball (171), and the other end is hinged to the ball head (1621).

7. The sliding rod transmission mechanism of the overlock sewing machine according to claim 1, characterized in that, The thrust bearing (113) includes a housing ring, a shaft ring, and rolling elements located between the housing ring and the shaft ring.

8. The sliding rod transmission mechanism of the overlock sewing machine according to claim 1, characterized in that, The coverlock sewing machine slide rod transmission mechanism also includes a slide rod frame (150), the slide rod (110) is movably inserted through the slide rod frame (150), the slide rod frame (150) is provided with a guide groove (151), the guide groove (151) extends along the axial direction of the slide rod (110), the stop block (112) is provided with a locking part (1121), the locking part (1121) is slidably locked in the guide groove (151).

9. The sliding rod transmission mechanism of the overlock sewing machine according to claim 8, characterized in that, The cover-sewing machine slide rod transmission mechanism also includes two slide rod sleeves (180), which are movably sleeved on the outer periphery of the slide rod, and the two slide rod sleeves (180) are respectively located at both ends of the slide rod frame (150).

10. A cover-stitching machine, characterized in that, The cover-up sewing machine includes the cover-up sewing machine slide transmission mechanism as described in any one of claims 1-9.

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