Needle position adjusting mechanism of double-needle machine

Abstract

The utility model relates to the technical field of double-needle machines, and discloses a needle position adjusting mechanism of a double-needle machine, which comprises a strip-shaped bottom frame and a needle rod, and the needle rod is mounted on the upper side of the middle of the strip-shaped bottom frame and is communicated with the inside of the strip-shaped bottom frame; two groups of positioning pipe sleeves are slidably mounted on the lower side of the strip-shaped bottom frame, a distance adjusting assembly for driving the two groups of positioning pipe sleeves to move is mounted on the inner side of the strip-shaped bottom frame, and the distance adjusting assembly comprises two groups of mounting plates and a group of bidirectional threaded shafts; a driving assembly is installed on the needle rod and drives the two-way threaded shaft to rotate, so that the two sets of moving blocks move close to or away from each other on the outer side of the two-way threaded shaft at the same time, and the distance between the two sets of positioning pipe sleeves is adjusted. Compared with the prior art, the needle position adjusting device has the advantages that the two sets of moving blocks and the positioning pipe sleeves on the lower sides of the moving blocks are driven to move close to or away from each other simultaneously through rotation of the two-way threaded shaft, so that double needles move simultaneously, and the needle position adjusting efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of double-needle machine technology, specifically to a needle position adjustment mechanism for a double-needle machine. Background Technology

[0002] A double-needle sewing machine, also known as a double-needle flatbed sewing machine, is a commonly used sewing machine that uses two needles in two- or three-synchronous motions and can turn corners to produce double threads that run parallel to each other. While a flatbed sewing machine can sometimes replace a double-needle machine, it's generally preferred for mass production to perform the same work as a double-needle machine, except for small-batch production where double-needle machines are more efficient and produce neat, parallel threads.

[0003] The existing double-needle machine has two sets of needles installed independently. When adjusting the position of the needles, it is necessary to turn two sets of adjustment knobs according to the distance between the parallel double lines to adjust the position of the two sets of needles. In addition, a ruler is needed to measure the distance between the two needles to achieve the double line requirement, which makes the needle position adjustment efficiency slow.

[0004] To address the aforementioned technical problems, this application proposes a needle position adjustment mechanism for a double-needle machine. Utility Model Content

[0005] I. Technical problems to be solved

[0006] The technical problem this invention aims to solve is that when adjusting the position of the needle, it is necessary to adjust the positions of the two sets of needles separately according to the distance between the parallel double lines, which makes the needle position adjustment efficiency slow.

[0007] II. Technical Solution

[0008] To solve the above-mentioned technical problems, the technical solution provided by this utility model is: a needle position adjustment mechanism for a double needle machine, including a strip-shaped bottom frame and a needle bar, wherein the needle bar is installed on the upper side of the middle part of the strip-shaped bottom frame and is connected to the inside of the strip-shaped bottom frame;

[0009] Two sets of positioning sleeves are slidably installed on the lower side of the strip-shaped bottom frame. An adjustment assembly for moving the two sets of positioning sleeves is installed on the inner side of the strip-shaped bottom frame. The adjustment assembly includes two sets of mounting plates and a set of bidirectional threaded shafts. The two sets of mounting plates are installed in the middle of the inner side of the strip-shaped bottom frame. The bidirectional threaded shaft rotates through the two sets of mounting plates, and movable blocks are respectively sleeved on the outer sides of both ends and connected by threads. The positioning sleeves are installed on the lower side of the movable blocks.

[0010] The needle bar is equipped with a drive assembly, which drives the bidirectional threaded shaft to rotate, causing two sets of moving blocks to move simultaneously closer to or further away from the outside of the bidirectional threaded shaft, thereby adjusting the distance between the two sets of positioning sleeves.

[0011] As an improvement, the drive assembly includes a first pulley and a second pulley. The first pulley is rotatably mounted inside the needle bar, and the second pulley is mounted on the outer side of the middle of the bidirectional threaded shaft. The outer sides of the first pulley and the second pulley are fitted with synchronous belts and are connected by trapezoidal teeth. The shaft end of the first pulley extends out of the needle bar and is fitted with a turning wheel.

[0012] As an improvement, a scale line is provided on the circumferential edge of the rotating wheel, and a pointer is provided on the outer side of the needle bar and located in the middle position on the upper side of the rotating wheel.

[0013] As an improvement, a spring is connected between the movable block and the mounting plate, and the spring is sleeved on the outside of the bidirectional threaded shaft.

[0014] As an improvement, a limiting block is installed on the top of the moving block, and a slide rail is provided on the top of the strip-shaped bottom frame to allow the limiting block to slide through. Threaded shafts are installed on both sides of the needle bar near the limiting block. The upper part of the limiting block is provided with a through hole to allow the threaded shaft to slide through. The other end of the threaded shaft passes through the through hole and is fitted with a positioning nut on its outer side.

[0015] As an improvement, positioning sleeves are installed at both ends of the strip-shaped bottom frame. The positioning sleeves rotate inside the side wall of the strip-shaped bottom frame. Both ends of the bidirectional threaded shaft are inserted into the inner side of the positioning sleeves and fixedly connected. The outer end of the positioning sleeve is provided with a slot.

[0016] As an improvement, the top of the positioning sleeve is a magnet, and a clamping structure is installed on the side wall.

[0017] III. Beneficial Effects

[0018] The advantages of this utility model compared with the prior art are as follows: by rotating the turning wheel, the double-threaded shaft is driven to rotate through pulley one, pulley two and the synchronous belt. The rotation of the double-threaded shaft drives the two sets of moving blocks and the positioning sleeves on their lower sides to move closer or further apart at the same time, so that the two needles move at the same time and improve the needle position adjustment efficiency. By cooperating with the scale line on the outside of the turning wheel and the pointer, the distance between the two needles can be checked in time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the needle position adjustment mechanism of a double-needle machine according to this utility model.

[0020] Figure 2 This is a schematic diagram of the upper side structure of the strip-shaped bottom frame of a needle position adjustment mechanism for a double-needle machine according to this utility model.

[0021] Figure 3 This is a schematic diagram of the lower side structure of the strip-shaped bottom frame of a needle position adjustment mechanism for a double-needle machine according to this utility model.

[0022] Figure 4This is a schematic diagram of the spacing adjustment component of the needle position adjustment mechanism of a double-needle machine according to the present invention.

[0023] Figure 5 This is a schematic diagram of the outer structure of the needle bar of a needle position adjustment mechanism for a double-needle machine according to this utility model.

[0024] Figure 6 This is a schematic diagram of the inner structure of the needle bar of a needle position adjustment mechanism for a double-needle machine according to this utility model.

[0025] Figure 7 This is a schematic diagram of the synchronous belt structure of the needle position adjustment mechanism of a double-needle machine according to the present invention.

[0026] As shown in the figure: 1. Strip-shaped base frame; 2. Needle bar; 3. Bidirectional threaded shaft; 4. Mounting plate; 5. Moving block; 6. Positioning sleeve; 7. Clamping structure; 8. Spring; 9. Limiting block; 10. Through hole; 11. Threaded shaft; 12. Positioning nut; 13. Pulley one; 14. Tightening wheel; 15. Pulley two; 16. Synchronous belt; 17. Slide rail; 18. Positioning sleeve; 19. Slot. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0028] Example 1

[0029] As attached Figure 1 As shown, a needle position adjustment mechanism for a double-needle machine includes a strip-shaped bottom frame 1 and a needle bar 2. The needle bar 2 is installed on the upper side of the middle part of the strip-shaped bottom frame 1 and is connected to the inside of the strip-shaped bottom frame 1. Two sets of positioning sleeves 6 are slidably installed on the lower side of the strip-shaped bottom frame 1. The top of the positioning sleeve 6 is a magnet, which attracts the top of the needle tip to the inside of the positioning sleeve 6. A clamping structure 7 is installed on the side wall of the positioning sleeve 6, and the top of the needle tip is clamped and fixed by rotating the clamping structure 7.

[0030] As attached Figure 1 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 and attached Figure 7As shown, an adjustment assembly for moving two sets of positioning sleeves 6 is installed on the inner side of the strip-shaped bottom frame 1. The adjustment assembly includes two sets of mounting plates 4 and a set of bidirectional threaded shafts 3. The two sets of mounting plates 4 are installed in the middle of the inner side of the strip-shaped bottom frame 1. The bidirectional threaded shaft 3 rotates through the two sets of mounting plates 4. A drive assembly is installed on the needle bar 2. The drive assembly includes a pulley 13 and a pulley 15. The pulley 13 is rotatably installed inside the needle bar 2. The pulley 15 is installed on the outer side of the middle of the bidirectional threaded shaft 3. A synchronous belt 16 is sleeved on the outer side of the pulley 13 and the pulley 15 and connected by trapezoidal teeth. The shaft end of the pulley 13 extends out of the needle bar 2 and is equipped with a turning wheel 14. Rotating the turning wheel 14 drives the pulley 13 to rotate. The pulley 13 drives the synchronous belt 16 to rotate. The synchronous belt 16 drives the pulley 15 and the bidirectional threaded shaft 3 to rotate.

[0031] The two ends of the bidirectional threaded shaft 3 are respectively fitted with movable blocks 5 and connected by threads. When the bidirectional threaded shaft 3 rotates, the two sets of movable blocks 5 move closer or further away from the outside of the bidirectional threaded shaft 3 at the same time. The positioning tube sleeve 6 is installed on the lower side of the movable blocks 5. The movable blocks 5 drive the positioning tube sleeve 6 and the needles inside it to move laterally, thereby adjusting the distance between the two sets of needles.

[0032] To make it easier to see the distance between the two needles, see attached. Figure 5 As shown, the distance between the two sets of needles is calculated by the rotation amplitude of the rotating wheel 14 and the moving distance of the moving block 5 outside the bidirectional threaded shaft 3. The rotating wheel 14 has a scale line on its circumference edge, and the needle bar 2 is provided with a pointer on the outside of the rotating wheel 14 and at the middle position on the upper side of the rotating wheel 14. When the rotating wheel 14 rotates, the distance between the two sets of needles is determined by looking at the scale line pointed to by the pointer.

[0033] To ensure the stability of moving block 5, as shown in the attached... Figure 1 Appendix Figure 2 and attached Figure 5 As shown, a spring 8 connects the movable block 5 and the mounting plate 4. The spring 8 is sleeved on the outside of the bidirectional threaded shaft 3. When the movable block 5 moves, the spring 8 supports the movable block 5 and prevents the movable block 5 from moving towards the mounting plate 4. A limit block 9 is installed on the top of the movable block 5. The top of the strip-shaped bottom frame 1 is provided with a slide rail 17 that cooperates with the limit block 9 to slide through. Threaded shafts 11 are respectively installed on both sides of the needle bar 2 near the limit block 9. The upper part of the limit block 9 is provided with a through hole 10 that cooperates with the threaded shaft 11 to slide through. When the movable block 5 moves, the limit block 9 slides outside the threaded shaft 11. After the position of the double needle is determined, the other end of the threaded shaft 11 passes through the through hole 10 and is sleeved with a positioning nut 12 on the outside. The positioning nut 12 is moved towards the limit block 9 to limit the movable block 5 and prevent the movable block 5 from moving away from the mounting plate 4.

[0034] Example 2

[0035] Based on Example 1, when the drive component is damaged and temporary adjustment of the dual-needle distance is required, as shown in the attached... Figure 5 As shown, positioning sleeves 18 are installed at both ends of the strip-shaped bottom frame 1. The positioning sleeves 18 rotate inside the side wall of the strip-shaped bottom frame 1. The two ends of the bidirectional threaded shaft 3 are inserted into the inner side of the positioning sleeves 18 and fixedly connected. The outer end of the positioning sleeve 18 is provided with a slot 19. A flathead screwdriver or other flathead device is inserted into the slot 19 and rotated, which drives the positioning sleeve 18 to rotate. The positioning sleeve 18 drives the bidirectional threaded shaft 3 to rotate, temporarily adjusting the distance between the two needles.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0038] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A needle position adjustment mechanism for a double-needle machine, comprising a strip-shaped bottom frame (1) and a needle bar (2), wherein the needle bar (2) is installed on the upper side of the middle part of the strip-shaped bottom frame (1) and communicates with the interior of the strip-shaped bottom frame (1), characterized in that: Two sets of positioning sleeves (6) are slidably installed on the lower side of the strip-shaped bottom frame (1). An adjustment component that drives the two sets of positioning sleeves (6) to move is installed on the inner side of the strip-shaped bottom frame (1). The adjustment component includes two sets of mounting plates (4) and a set of bidirectional threaded shafts (3). The two sets of mounting plates (4) are installed in the middle of the inner side of the strip-shaped bottom frame (1). The bidirectional threaded shaft (3) rotates through the two sets of mounting plates (4), and each end of the shaft is fitted with a moving block (5) and connected by a thread. The positioning sleeves (6) are installed on the lower side of the moving block (5). The needle bar (2) is equipped with a drive assembly, which drives the bidirectional threaded shaft (3) to rotate, so that the two sets of moving blocks (5) move closer or further away from the outside of the bidirectional threaded shaft (3) at the same time, adjusting the distance between the two sets of positioning sleeves (6).

2. The needle position adjustment mechanism of a double-needle machine according to claim 1, characterized in that: The drive assembly includes a first pulley (13) and a second pulley (15). The first pulley (13) is rotatably mounted inside the needle bar (2). The second pulley (15) is mounted on the outer side of the middle part of the bidirectional threaded shaft (3). A synchronous belt (16) is fitted on the outer side of the first pulley (13) and the second pulley (15) and they are connected by a trapezoidal tooth meshing. The shaft end of the first pulley (13) extends out of the needle bar (2) and is equipped with a turning wheel (14).

3. The needle position adjustment mechanism of a double-needle machine according to claim 2, characterized in that: The circumferential edge of the rotating wheel (14) is provided with scale lines, and the needle bar (2) is provided with a pointer on the outer side and in the middle position on the upper side of the rotating wheel (14).

4. The needle position adjustment mechanism of a double-needle machine according to claim 1, characterized in that: A spring (8) is connected between the movable block (5) and the mounting plate (4), and the spring (8) is sleeved on the outside of the bidirectional threaded shaft (3).

5. The needle position adjustment mechanism of a double-needle machine according to claim 4, characterized in that: The top of the movable block (5) is equipped with a limiting block (9), and the top of the strip-shaped bottom frame (1) is provided with a slide (17) through which the limiting block (9) slides. The needle bar (2) is equipped with threaded shafts (11) on both sides near the limiting block (9). The upper part of the limiting block (9) is provided with a through hole (10) through which the threaded shaft (11) slides. The other end of the threaded shaft (11) passes through the through hole (10) and is fitted with a positioning nut (12) on the outside.

6. The needle position adjustment mechanism of a double-needle machine according to claim 1, characterized in that: The two ends of the strip-shaped bottom frame (1) are respectively fitted with positioning sleeves (18), which rotate inside the side wall of the strip-shaped bottom frame (1). The two ends of the bidirectional threaded shaft (3) are respectively inserted into the inner side of the positioning sleeve (18) and fixedly connected. The outer end of the positioning sleeve (18) is provided with a slot (19).

7. The needle position adjustment mechanism of a double-needle machine according to claim 1, characterized in that: The top of the positioning sleeve (6) is a magnet, and a clamping structure (7) is installed on the side wall.

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