Double-needle-bar switching mechanism of double-needle sewing machine

Abstract

The utility model relates to the technical field of double-needle sewing machines, and discloses a double-needle-bar switching mechanism of a double-needle sewing machine, which comprises a switching seat, a first driving seat and a second driving seat are respectively and movably mounted on two sides of the switching seat, and limiting chutes are respectively arranged in the first driving seat and the second driving seat. The inner wall of the limiting sliding groove is slidably connected with a needle rod. The utility model has the following advantages and effects: the mounting groove moves upwards, the mounting plate drives the corresponding needle bar to move on the line, and the needle bar and the limiting plate slide upwards on the inner wall of the limiting chute, so that after the needle bar retracts into the limiting chute, the switching of the two needle bars is realized, and the two needle bars work independently; after the air cylinder is started, the telescopic rod is driven to extend, the mounting groove is pushed out of the middle of the limiting sliding groove, the mounting groove is exposed outside the bottoms of the first driving base and the second driving base, and therefore the needle rod can be detached and replaced conveniently, and the sewing effect is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the technical field of double-needle sewing machines, in particular to a double-needle bar switching mechanism for double-needle sewing machines. Background Art

[0002] A double-needle sewing machine is a machine with two needles. It is often used to hem cuffs in the garment industry and is an indispensable piece of equipment. Cuffs sewn by a double-needle sewing machine form two parallel seams.

[0003] In the prior art, Chinese patent publication number CN217973639U discloses a double needle bar switching mechanism for a double needle sewing machine, comprising a mechanism mounting seat, a double needle bar assembly, a needle bar drive device, a double needle bar switching device and a double needle bar switching drive device, wherein the needle bar drive device is fixedly mounted on the double needle bar assembly, and the double needle bar switching device is fixedly connected to the double needle bar switching drive device; wherein the double needle bar switching device comprises a double needle bar linkage seat, a double needle bar linkage seat guide rail, a first needle bar limiting groove and a second needle bar limiting groove, and the double needle bar assembly is fixedly arranged on the double needle bar linkage seat, and the double needle bar linkage seat guide rail comprises an upper slide rail, an upper slide groove, a lower slide rail and a lower slide groove. The double needle bar switching mechanism of the double needle sewing machine of the present invention has a simple structure and is more convenient to install and debug than the existing double needle bar switching mechanism. It can jam the non-moving needle bar during operation, thereby improving stability during operation. When switching the needle bar, it can easily slide left and right, and has better stability and precision for long-term operation.

[0004] However, when the utility model is actually used, the sewing needle is easily worn out after long-term use, and thus the needle is not sharp enough, which may affect the sewing effect. It is also inconvenient to disassemble and replace the needle rod, so it needs to be improved. Utility Model Content

[0005] The utility model aims to provide a double needle bar switching mechanism for a double needle sewing machine, which is convenient for disassembling and replacing the needle bars and avoids affecting the sewing effect.

[0006] The above-mentioned technical purpose of the present utility model is achieved through the following technical solutions: A double needle bar switching mechanism of a double needle sewing machine, including a switching seat, a first driving seat and a second driving seat are movably installed on both sides of the switching seat, and a limiting slide groove is provided inside the first driving seat and the second driving seat, and the inner wall of the limiting slide groove is slidably connected to the needle bar, and the outer surface of the needle bar is fixedly connected to the limiting plate, and a driving cavity is provided inside the first driving seat and the second driving seat, and the inner wall of the driving cavity is fixedly connected to the cylinder, and the output end of the cylinder is fixedly connected to a telescopic rod, the bottom of the telescopic rod is fixedly connected to the mounting groove, and the top of the needle bar is fixedly connected to the mounting plate.

[0007] By adopting the above technical solution, when the staff is in use, during double-needle sewing, the two needle bars work synchronously. When the needle bar needs to be switched, the cylinder inside the first drive seat or the second drive seat can be started, and the cylinder drives the telescopic rod to retract, thereby driving the mounting groove to move upward, and the mounting plate drives the corresponding needle bar to move online, and the needle bar and the limit plate slide upward on the inner wall of the limiting slide, so that the needle bar retracts into the limiting slide, thereby realizing the switching of the two needle bars, and the two needle bars work individually. When the needle bar needs to be replaced, the cylinder is started and drives the telescopic rod to extend, pushing the mounting groove out from the middle of the limiting slide, and the mounting groove is exposed on the outside of the bottom of the first drive seat and the second drive seat, so that the needle bar can be disassembled and replaced to avoid affecting the sewing effect.

[0008] The present invention is further configured as follows: avoidance grooves are provided on both sides of the installation groove, and bolts are connected to the internal threads of the avoidance grooves.

[0009] By adopting the above technical solution, the mounting plate is fixed by bolts, and the bolts are easy to disassemble.

[0010] The present invention is further configured as follows: the bolt passes through the interior of the mounting plate, and a nut is threadedly connected to the outer surface of the bolt.

[0011] By adopting the above technical solution, the nut reinforces the bolt, and the avoidance groove prevents the bolt from protruding.

[0012] The present invention is further configured as follows: grooves are provided on the tops of the first drive seat and the second drive seat, and fixing bolts are connected to the internal threads of the grooves.

[0013] By adopting the above technical solution, the fixing bolts fix the first drive seat and the second drive seat, and are fixed on both sides of the first drive seat and the second drive seat.

[0014] The present invention is further configured as follows: a sliding groove is provided on the outer surface of the switching seat, and sliding bars are fixedly connected to the outer surfaces of the first driving seat and the second driving seat.

[0015] By adopting the above technical solution, when the first drive seat and the second drive seat are installed, the bottom of the slide bar corresponding to the slide groove is pushed upward, and the fixing bolt is then fixed after the slide bar enters the slide groove.

[0016] The present invention is further configured as follows: outer surfaces of the first drive seat and the second drive seat are both fixedly connected to stabilizing plates, and outer surfaces of the stabilizing plates are provided with anti-slip grooves.

[0017] By adopting the above technical solution, the stabilizing plate is stably reinforced. When the first driving seat and the second driving seat need to be disassembled, the hand can push the anti-slip groove after the fixing bolts are removed.

[0018] The present invention is further configured as follows: a pad is fixedly connected to the top of the switching seat, and a mounting rod is fixedly connected to the top of the switching seat.

[0019] By adopting the above technical solution, the mounting rod is connected to the head of the sewing machine, and the pad improves the firmness of the connection.

[0020] The present invention is further configured as follows: a needle head is fixedly connected to the bottom of the needle rod, and the number of the needle rods is two.

[0021] By adopting the above technical solution, the bottom of the needle is sharp, and the needle can be replaced after the needle rod is replaced.

[0022] The present invention is further configured as follows: a threaded hole is provided on the top of the switching seat, and the fixing bolt extends into the interior of the threaded hole.

[0023] By adopting the above technical solution, when the fixing bolt is fixed, it is threadedly connected with the threaded hole.

[0024] The present invention is further configured as follows: the number of the fixing bolts is two, and the two fixing bolts are symmetrically distributed.

[0025] By adopting the above technical solution, the fixing bolts fix the tops of the first drive seat and the second drive seat, and under the limitation of the slide bar, they are not easy to loosen after being fixed.

[0026] The beneficial effects of the utility model are:

[0027] 1. The utility model adopts the coordinated arrangement among the switching seat, the first driving seat, the second driving seat, the limiting slide, the needle bar, the limiting plate, the driving chamber, the cylinder, the telescopic rod, the mounting slot and the mounting plate, so that when the device is in use, the staff can use it. When double-needle sewing, the two needle bars work synchronously. When the needle bar needs to be switched, the cylinder inside the first driving seat or the second driving seat can be started, and the cylinder drives the telescopic rod to retract, thereby driving the mounting slot to move upward, and the mounting plate drives the corresponding needle bar to move online, and the needle bar and the limiting plate slide upward on the inner wall of the limiting slide, so that the needle bar retracts into the limiting slide, thereby realizing switching of the two needle bars, and the two needle bars work individually. When the needle bar needs to be replaced, the cylinder drives the telescopic rod to extend after starting, pushing the mounting slot out from the middle of the limiting slide, and the mounting slot is exposed to the outside of the bottom of the first driving seat and the second driving seat, thereby facilitating the disassembly and replacement of the needle bar to avoid affecting the sewing effect.

[0028] 2. The utility model discloses a device for fixing the first drive seat and the second drive seat by the avoidance groove, the bolt, the nut, the groove, the fixing bolt, the slide groove, the slide bar, the stabilizing plate, the pad, the mounting rod, the needle and the threaded hole. The bolt is fixed to the mounting plate when the device is in use, the bolt is easy to disassemble, the nut reinforces the bolt, the avoidance groove prevents the bolt from protruding, and the fixing bolt is fixed to both sides of the first drive seat and the second drive seat. When the first drive seat and the second drive seat are installed, the bottom of the slide bar corresponding to the slide groove is pushed upward, and the slide bar enters the slide groove and then fixes the fixing bolt, and the stabilizing plate is stably reinforced. When the first drive seat and the second drive seat need to be disassembled, the fixing bolt can be pushed at the anti-slip groove by the hand after the fixing bolt is removed, and the mounting rod is connected to the head of the sewing machine. The pad improves the firmness after the connection, the bottom of the needle is sharp, and the needle can be replaced after the needle bar is replaced. When the fixing bolt is fixed, it is threadedly connected with the threaded hole, and the fixing bolt fixes the top of the first drive seat and the second drive seat. Under the limit of the slide bar, it is not easy to loosen after being fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is a schematic diagram of the structure of the utility model;

[0031] Figure 2 This is a schematic diagram of the needle bar structure of the utility model;

[0032] Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0033] Figure 4 This is a schematic diagram of the slider structure of the utility model.

[0034] In the figure, 1. switching seat; 2. first driving seat; 3. second driving seat; 4. limiting slide; 5. needle rod; 6. limiting plate; 7. driving chamber; 8. cylinder; 9. telescopic rod; 10. mounting groove; 11. mounting plate; 12. avoidance groove; 13. bolt; 14. nut; 15. groove; 16. fixing bolt; 17. slide; 18. slide bar; 19. stabilizing plate; 20. pad; 21. mounting rod; 22. needle; 23. threaded hole. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions of the present invention in conjunction with specific embodiments. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0036] Reference Figure 1-4, a double needle bar switching mechanism for a double needle sewing machine includes a switching seat 1, a first driving seat 2 and a second driving seat 3 are movably installed on both sides of the switching seat 1, a limiting slide groove 4 is provided inside the first driving seat 2 and the second driving seat 3, a needle bar 5 is slidably connected to the inner wall of the limiting slide groove 4, and the outer surface of the needle bar 5 is fixedly connected to the limiting plate 6, a driving cavity 7 is provided inside the first driving seat 2 and the second driving seat 3, a cylinder 8 is fixedly connected to the inner wall of the driving cavity 7, the output end of the cylinder 8 is fixedly connected to a telescopic rod 9, the bottom of the telescopic rod 9 is fixedly connected to a mounting groove 10, and the top of the needle bar 5 is fixedly connected to a mounting plate 11. When the staff is in use, during double needle sewing, the two needle bars 5 work synchronously. When the needle bar 5 needs to be switched, the first driving seat 2 can be started Or the cylinder 8 inside the second drive seat 3, the cylinder 8 drives the telescopic rod 9 to retract, thereby driving the installation slot 10 to move upward, and the installation plate 11 drives the corresponding needle bar 5 to move online, and the needle bar 5 and the limiting plate 6 slide upward on the inner wall of the limiting slide 4, so that the needle bar 5 retracts into the limiting slide 4, thereby realizing the switching of the two needle bars 5, and the two needle bars 5 work individually. When the needle bar 5 needs to be replaced, the cylinder 8 starts and drives the telescopic rod 9 to extend, pushing the installation slot 10 out from the middle of the limiting slide 4. The installation slot 10 is exposed to the outside of the bottom of the first drive seat 2 and the second drive seat 3, so that the needle bar 5 can be disassembled and replaced easily to avoid affecting the sewing effect. Avoidance grooves 12 are provided on both sides of the installation groove 10, and the internal thread connection of the avoidance groove 12 has Bolt 13, bolt 13 fixes the mounting plate 11, bolt 13 is easy to disassemble, bolt 13 passes through the inside of the mounting plate 11, the outer surface of the bolt 13 is threadedly connected with a nut 14, the nut 14 reinforces the bolt 13, and the avoidance groove 12 prevents the bolt 13 from protruding. The top of the first drive seat 2 and the second drive seat 3 are both provided with a groove 15, the internal thread of the groove 15 is connected with a fixing bolt 16, the fixing bolt 16 fixes the first drive seat 2 and the second drive seat 3, and is fixed on both sides of the first drive seat 2 and the second drive seat 3. A slide groove 17 is provided on the outer surface of the switching seat 1, and the outer surfaces of the first drive seat 2 and the second drive seat 3 are fixedly connected with a slide bar 18. When the first drive seat 2 and the second drive seat 3 are installed, the slide bar 18 corresponds to the slide The bottom of the groove 17 is pushed upward, and the slide bar 18 enters the slide groove 17 and then fixes the fixing bolt 16. The outer surfaces of the first drive seat 2 and the second drive seat 3 are fixedly connected with a stabilizing plate 19. The outer surface of the stabilizing plate 19 is provided with anti-slip grooves. The stabilizing plate 19 is stabilized and reinforced. When the first drive seat 2 and the second drive seat 3 need to be disassembled, the fixing bolt 16 is removed and the hand can push the anti-slip grooves. The top of the switching seat 1 is fixedly connected with a pad 20. The top of the switching seat 1 is fixedly connected with a mounting rod 21. The mounting rod 21 is connected to the head of the sewing machine. The pad 20 improves the firmness after the connection. The bottom of the needle bar 5 is fixedly connected with a needle head 22. There are two needle bars 5. The bottom of the needle head 22 is sharp. When the needle bar 5 is replaced, the needle head 22 can be replaced.A threaded hole 23 is formed at the top of the switching seat 1. A fixing bolt 16 extends into the interior of the threaded hole 23. When the fixing bolt 16 is fixed, it is threadedly connected to the threaded hole 23. There are two fixing bolts 16, which are symmetrically distributed. The fixing bolts 16 fix the tops of the first drive seat 2 and the second drive seat 3. Under the limit of the slide bar 18, they are not easy to loosen after being fixed.

[0037] In the present invention, by coordinating the switching seat 1, the first drive seat 2, the second drive seat 3, the limiting slide 4, the needle bar 5, the limiting plate 6, the drive chamber 7, the cylinder 8, the telescopic rod 9, the mounting groove 10 and the mounting plate 11, the device can be used. When the staff is using the device, during double-needle sewing, the two needle bars 5 work synchronously. When it is necessary to switch the needle bar 5, the cylinder 8 inside the first drive seat 2 or the second drive seat 3 can be started. The cylinder 8 drives the telescopic rod 9 to contract, thereby driving the mounting groove 10 to move upward, and the mounting plate 11 drives the corresponding needle bar 5 to move online. The needle bar 5 and the limiting plate 6 slide upward on the inner wall of the limiting slide 4, so that the needle bar 5 retracts into the limiting slide 4, thereby realizing the switching of the two needle bars 5. The two needle bars 5 work individually. When the needle bar 5 needs to be replaced, the cylinder 8 is started and drives the telescopic rod 9 to extend, pushing the mounting groove 10 out from the middle of the limiting slide 4. The mounting groove 10 is exposed on the outside of the bottom of the first drive seat 2 and the second drive seat 3, so that the needle bar 5 can be disassembled and replaced to avoid affecting the sewing effect. Through the avoidance groove 12, the bolt 13, the nut 14, the groove 15, the fixing bolt 16, the slide 1 7. The matching arrangement between the slide bar 18, the stabilizing plate 19, the pad 20, the mounting rod 21, the needle 22 and the threaded hole 23 enables the device to be used. The bolt 13 fixes the mounting plate 11. The bolt 13 is easy to disassemble. The nut 14 reinforces the bolt 13. The avoidance groove 12 prevents the bolt 13 from protruding. The fixing bolt 16 fixes the first drive seat 2 and the second drive seat 3 and is fixed on both sides of the first drive seat 2 and the second drive seat 3. When the first drive seat 2 and the second drive seat 3 are installed, the bottom of the slide bar 18 corresponding to the slide groove 17 is pushed upward, and the slide bar 1 8 After entering the slide groove 17, fix the fixing bolt 16 and the stabilizing plate 19 for stabilization and reinforcement. When the first drive seat 2 and the second drive seat 3 need to be disassembled, the fixing bolt 16 can be removed and the hand can push the anti-slip groove. The mounting rod 21 is connected to the head of the sewing machine. The pad 20 improves the firmness after the connection. The bottom of the needle 22 is sharp. When the needle bar 5 is replaced, the needle 22 can be replaced. When the fixing bolt 16 is fixed, it is threadedly connected to the threaded hole 23. The fixing bolt 16 fixes the top of the first drive seat 2 and the second drive seat 3. Under the limit of the slide bar 18, it is not easy to loosen after being fixed.

[0038] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double needle bar switching mechanism for a double needle sewing machine, comprising a switching seat (1), characterized in that: A first drive seat (2) and a second drive seat (3) are movably mounted on both sides of the switching seat (1), and a limiting slide groove (4) is provided inside the first drive seat (2) and the second drive seat (3), and a needle rod (5) is slidably connected to the inner wall of the limiting slide groove (4), and the outer surface of the needle rod (5) is fixedly connected to the limiting plate (6). A driving cavity (7) is provided inside the first drive seat (2) and the second drive seat (3), and a cylinder (8) is fixedly connected to the inner wall of the driving cavity (7), and the output end of the cylinder (8) is fixedly connected to a telescopic rod (9), and the bottom of the telescopic rod (9) is fixedly connected to a mounting groove (10), and the top of the needle rod (5) is fixedly connected to a mounting plate (11).

2. A double needle bar switching mechanism for a double needle sewing machine according to claim 1, characterized in that: Both sides of the installation groove (10) are provided with avoidance grooves (12), and the internal threads of the avoidance grooves (12) are connected with bolts (13).

3. The double needle bar switching mechanism of a double needle sewing machine according to claim 2, characterized in that: The bolt (13) passes through the interior of the mounting plate (11), and a nut (14) is threadedly connected to the outer surface of the bolt (13).

4. The double needle bar switching mechanism for a double needle sewing machine according to claim 1, characterized in that: A groove (15) is provided on the top of each of the first drive seat (2) and the second drive seat (3), and a fixing bolt (16) is connected to the inner thread of the groove (15).

5. The double needle bar switching mechanism of a double needle sewing machine according to claim 1, characterized in that: The outer surface of the switching seat (1) is provided with a sliding groove (17), and the outer surfaces of the first driving seat (2) and the second driving seat (3) are fixedly connected with a sliding bar (18).

6. The double needle bar switching mechanism of a double needle sewing machine according to claim 1, characterized in that: The outer surfaces of the first drive seat (2) and the second drive seat (3) are both fixedly connected with a stabilizing plate (19), and the outer surfaces of the stabilizing plate (19) are provided with anti-slip grooves.

7. The double needle bar switching mechanism for a double needle sewing machine according to claim 1, characterized in that: A backing plate (20) is fixedly connected to the top of the switching seat (1), and a mounting rod (21) is fixedly connected to the top of the switching seat (1).

8. The double needle bar switching mechanism for a double needle sewing machine according to claim 1, characterized in that: The bottom of the needle rod (5) is fixedly connected with a needle head (22), and the number of the needle rods (5) is two.

9. The double needle bar switching mechanism for a double needle sewing machine according to claim 4, characterized in that: A threaded hole (23) is provided on the top of the switching seat (1), and the fixing bolt (16) extends into the interior of the threaded hole (23).

10. The double needle bar switching mechanism of a double needle sewing machine according to claim 4, characterized in that: The number of the fixing bolts (16) is two, and the two fixing bolts (16) are symmetrically distributed.

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