Sewing thread knotting mechanism

Abstract

The invention relates to the technical field of sewing machines. According to the technical scheme, the device is characterized by comprising a fixing plate and a mounting base; the device is characterized in that the mounting seat is detachably mounted on the lower end face of the fixing plate; a containing groove is formed in the upper end face of the fixing plate. A needle head assembly for knotting a sewing thread is rotatably mounted in the accommodating groove; a transmission assembly used for driving the needle head assembly to rotate, a driving assembly used for driving the transmission assembly and a limiting assembly used for limiting the transmission assembly are arranged on the fixed seat; the output end of the driving assembly is in transmission connection with the input end of the transmission assembly; the output end of the limiting assembly can abut against the transmission assembly. The output end of the driving assembly penetrates through the fixing plate and then is fixedly connected with the input end of the needle head assembly. Integrated operation of sewing of the sewing machine and automatic knotting of sewing threads can be achieved, the production and processing efficiency is effectively improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sewing equipment, and more particularly to a sewing thread knotting mechanism. Background Art

[0002] A sewing machine is a machine that uses one or more sewing threads to interweave and sew fabrics to form stitches. After the existing sewing machines have completed sewing the fabric, when tying a knot at the end of the fabric thread, the sewn fabric needs to be placed on another machine for sewing reinforcement before the fabric sewing operation can be completed. However, this processing method that requires two machines to cooperate to complete the fabric sewing is cumbersome to operate, has high labor costs, and has low production and processing efficiency. For this reason, we propose a new sewing thread knotting structure for sewing machines. Summary of the invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a sewing thread knotting mechanism to solve the technical problems existing in the above-mentioned background technology.

[0004] The above technical objectives of the present invention are achieved through the following technical solutions: a sewing thread knotting mechanism, comprising: a fixing plate, and a mounting seat; characterized in that the mounting seat is detachably mounted on the lower end surface of the fixing plate; a receiving groove is provided on the upper end surface of the fixing plate; a needle assembly used for knotting the sewing thread can be rotatably installed in the receiving groove; a transmission assembly for driving the needle assembly to rotate, a driving assembly for driving the transmission assembly, and a limiting assembly for limiting the transmission assembly are provided on the fixing seat; the output end of the driving assembly is transmission-connected to the input end of the transmission assembly; the output end of the limiting assembly can abut against the transmission assembly; the output end of the driving assembly is fixedly connected to the input end of the needle assembly after passing through the fixing plate.

[0005] Optionally, the needle assembly includes: a connecting part, a Z-shaped plate, and a mounting plate; one end of the connecting part is fixedly connected to the output end of the transmission assembly, and the other end is hinged to one end of the Z-shaped plate; the Z-shaped plate is rotatably installed in the accommodating groove by a screw rod; the other end of the Z-shaped plate is detachably connected to the mounting plate; a thread pushing needle and a thread hooking needle are relatively arranged on the mounting plate.

[0006] Optionally, the thread pushing needle includes: a first needle body, and a thread pushing portion; one end of the first needle body is fixedly connected to the mounting plate, and the other end is fixedly connected to the thread pushing portion; the first needle body and the thread pushing portion are integrally formed.

[0007] Optionally, the thread hooking needle includes: a second needle body, and a thread hooking part; one end of the second needle body is fixedly connected to the mounting plate, and the other end is fixedly connected to the thread hooking part; the second needle body and the thread hooking part are integrally formed.

[0008] Optionally, the mounting plate is integrally formed with the thread pushing needle and the thread hooking needle.

[0009] Optionally, the distance between the thread hooking needle and the thread pushing needle is 0.5cm-1cm.

[0010] Optionally, the transmission assembly includes: a transmission block, a connecting piece, and a guide rod; a mounting cavity is provided on the mounting seat; the transmission block can be slidably installed in the mounting cavity; one end of the transmission block is fixedly connected to the driving assembly; one end of the guide rod is detachably connected to the other end of the transmission block, and its other end passes through the mounting seat to the outside of the mounting seat; the guide rod is slidably connected to the mounting seat; a limiting head is provided on the end of the guide rod away from the mounting seat; a sliding groove compatible with the connecting piece is provided on the fixed plate; one end of the connecting piece is detachably connected to an end of the transmission block close to the guide rod; the other end is fixedly connected to the connecting part after passing through the sliding groove.

[0011] Optionally, the driving assembly includes: a driving cylinder and a push block; the driving cylinder is detachably mounted on the mounting seat, and its output end is fixedly connected to the input end of the push block; the output end of the push block passes through the side wall of the mounting seat and is placed in the mounting cavity, and is fixedly connected to the transmission block.

[0012] Optionally, the limit assembly includes: a limit cylinder, a return spring, an L-shaped plate, a fixed block, and a limit block; the limit cylinder is connected and installed on the mounting seat through the L-shaped plate; the mounting seat is provided with a through slot connected to the mounting cavity; the fixed block is installed in the through slot; the L-shaped plate is provided with a slot matching the through slot; one end of the limit block is hinged to the fixed block, and the other end can abut against the output end of the limit cylinder after passing through the slot; a limit hook is provided on the limit block; the limit hook can abut against one end of the transmission block away from the push block; one end of the return spring is fixedly connected to the L-shaped plate, and the other end is fixedly connected to one end of the limit block close to the limit cylinder.

[0013] The present invention further provides a sewing machine, which comprises the sewing thread knotting mechanism described above.

[0014] In summary, the present invention has the following beneficial effects: it can realize the integrated operation of sewing by a sewing machine and automatic knotting of sewing threads, effectively improve production and processing efficiency, and reduce manual labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is an assembly diagram of the present invention;

[0016] Figure 2 It is a schematic diagram of the structure of the present invention when assembled;

[0017] Figure 3 It is a schematic diagram of the structural relationship between the drive assembly and the installation in the present invention;

[0018] Figure 4 It is a schematic diagram of the structural relationship between the transmission assembly and the drive assembly in the present invention;

[0019] Figure 5 It is a schematic diagram of the structural relationship between the transmission assembly and the mounting seat in the present invention;

[0020] Figure 6 It is a schematic diagram of the structural relationship between the fixed block and the limiting block in the present invention.

[0021] In the figure: 1. fixing plate; 2. mounting seat; 3. accommodating groove; 4. needle assembly; 41. connecting part; 42. Z-shaped plate; 43. mounting plate; 44. thread pushing needle; 4401. first needle body; 4402. thread pushing part; 45. thread hooking needle; 4501. second needle body; 4502. thread hooking part; 5. transmission assembly; 51. transmission block; 52. connecting piece; 53. guide rod; 54. limiting head; 6. driving assembly; 61. driving cylinder; 62. pushing block; 7. limiting assembly; 71. limiting cylinder; 72. reset spring; 73. L-shaped plate; 74. fixing block; 75. limiting block; 76. limiting hook; 8. mounting cavity; 9. through groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. Several embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0024] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. The terms "vertical", "horizontal", "left", "right", "above", "below" and similar expressions are for illustrative purposes only, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0025] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0026] The present invention provides a sewing thread knotting mechanism, such as Figure 1-6As shown, it includes: a fixing plate 1, and a mounting seat 2; it is characterized in that the mounting seat 2 can be detachably mounted on the lower end surface of the fixing plate 1; a receiving groove 3 is arranged on the upper end surface of the fixing plate 1; a needle assembly 4 used for knotting the sewing thread can be rotatably installed in the receiving groove 3; a transmission assembly 5 for driving the needle assembly 4 to rotate, a driving assembly 6 for driving the transmission assembly 5, and a limiting assembly 7 for limiting the transmission assembly 5 are arranged on the fixing seat; the output end of the driving assembly 6 is transmission-connected with the input end of the transmission assembly 5; the output end of the limiting assembly 7 can abut against the transmission assembly 5; the output end of the driving assembly 6 is fixedly connected with the input end of the needle assembly 4 after passing through the fixing plate 1; specifically, the sewing thread knotting mechanism is a structural component installed on the sewing machine, which can realize the integrated operation of sewing by the sewing machine and automatic knotting of the sewing thread, effectively improve the production and processing efficiency, and reduce the labor intensity of manual labor.

[0027] Furthermore, the needle assembly 4 includes: a connecting portion 41, a Z-shaped plate 42, and a mounting plate 43; one end of the connecting portion 41 is fixedly connected to the output end of the transmission assembly 5, and the other end is hinged to one end of the Z-shaped plate 42; the Z-shaped plate 42 is rotatably installed in the accommodating groove 3 through a screw; the other end of the Z-shaped plate 42 is detachably connected to the mounting plate 43; a thread pushing needle 44 and a thread hooking needle 45 are arranged on the mounting plate 43 in a relative manner; the thread pushing needle 44 includes: a first needle body 4401, and a thread pushing portion 4402; one end of the first needle body 4401 is fixedly connected to the mounting plate 43, and the other end is fixedly connected to the thread pushing portion 4402; the first needle body 4401 and the thread pushing portion 4402 are integrally formed; the thread hooking needle 45 comprises: a second needle body 4501, and a thread hooking portion 4502; one end of the second needle body 4501 is fixedly connected to the mounting plate 43, and the other end is fixedly connected to the thread hooking portion 4502; the second needle body 4501 and the thread hooking portion 4502 are integrally formed.

[0028] In this embodiment, if Figure 1-2 As shown, the needle assembly 4 is mainly composed of a connecting part 41, a Z-shaped plate 42, a mounting plate 43, namely, a thread pushing needle 44 and a thread hooking needle 45 on the mounting plate 43; the Z-shaped plate 42 is rotatably mounted in the accommodating groove 3 through a screw; when working, the transmission assembly 5 works to pull the connecting part 41 to make a lateral movement, thereby driving the Z-shaped plate 42 to rotate around the screw in the accommodating groove 3, so as to drive the mounting plate 43 installed at the other end thereof and the thread pushing needle 44 and the thread hooking needle 45 on the mounting plate 43 to move, and the thread pushing needle 44 and the thread hooking needle 45 perform multiple reciprocating coordinated movements of hooking and pushing the thread, so as to realize the knotting operation of the sewing thread; the operation is convenient and quick.

[0029] Furthermore, the mounting plate 43 is integrally formed with the thread pushing needle 44 and the thread hooking needle 45; the integrally formed structure can effectively ensure its structural strength.

[0030] Furthermore, the distance between the thread hooking needle 45 and the thread pushing needle 44 is 0.5 cm-1 cm.

[0031] Furthermore, the transmission assembly 5 includes: a transmission block 51, a connecting piece 52, and a guide rod 53; a mounting cavity 8 is provided on the mounting seat 2; the transmission block 51 can be slidably installed in the mounting cavity 8; one end of the transmission block 51 is fixedly connected to the driving assembly 6; one end of the guide rod 53 is detachably connected to the other end of the transmission block 51, and the other end thereof passes through the mounting seat 2 to the outside of the mounting seat 2; the guide rod 53 is slidably connected to the mounting seat 2; a limiting head 54 is provided on the end of the guide rod 53 away from the mounting seat 2; a sliding groove adapted to the connecting piece 52 is provided on the fixing plate 1; one end of the connecting piece 52 is detachably connected to an end of the transmission block 51 close to the guide rod 53; the other end is fixedly connected to the connecting portion 41 after passing through the sliding groove.

[0032] In this embodiment, if Figure 2-5 As shown, the transmission assembly 5 is mainly composed of: a transmission block 51, a connecting piece 52, and a guide rod 53. When working, the driving assembly 6 pushes the transmission block 51 to move back and forth along the installation cavity 8 under the action of the guide rod 53, thereby driving the connecting piece 52 to move back and forth. During the movement of the connecting piece 52, the connecting part 41 on the needle assembly 4 is driven to reciprocate, so that the needle assembly 4 can perform a knotting operation on the sewing thread.

[0033] Further, the driving assembly 6 includes: a driving cylinder 61 and a push block 62; the driving cylinder 61 is detachably mounted on the mounting seat 2, and its output end is fixedly connected to the input end of the push block 62; the output end of the push block 62 passes through the side wall of the mounting seat 2 and is placed in the mounting cavity 8, and is fixedly connected to the transmission block 51; specifically, as Figure 3-5 As shown, the driving cylinder 61 adopts a conventional cylinder, which is a mature technical product on the market and will not be described in detail here.

[0034] Furthermore, the limiting assembly 7 includes: a limiting cylinder 71, a return spring 72, an L-shaped plate 73, a fixing block 74, and a limiting block 75; the limiting cylinder 71 is connected and installed on the mounting seat 2 through the L-shaped plate 73; the mounting seat 2 is provided with a through groove communicating with the mounting cavity 8; the fixing block 74 is installed in the through groove; the L-shaped plate 73 is provided with a slot adapted to the through groove; one end of the limiting block 75 is hinged to the fixing block 74, and the other end can abut against the output end of the limiting cylinder 71 after passing through the slot; a limiting hook portion 76 is provided on the limiting block 75; the limiting hook portion 76 can abut against one end of the transmission block 51 away from the push block 62; one end of the return spring 72 is fixedly connected to the L-shaped plate 73, and the other end is fixedly connected to one end of the limiting block 75 close to the limiting cylinder 71.

[0035] In this embodiment, if Figure 3-6 As shown, the limiting assembly 7 is mainly composed of a limiting cylinder 71, a reset spring 72, an L-shaped plate 73, a fixing block 74, a limiting block 75, and a limiting hook 76 assembly; the limiting assembly 7 is used to limit and fix the transmission block 51 to achieve the opening and closing operation of controlling the movement of the transmission block 51; during the sewing process of the sewing machine, the limiting cylinder 71 is in a working state, at which time the piston of the limiting cylinder 71 is in a pushed-out state, and its end face is tightly against the limiting block 75, so that the limiting hook 76 is tightly against the end of the transmission block 51 away from the push block 62 to avoid unfinished sewing, and the driving cylinder 61 is driven to drive the needle assembly 4 to perform a knotting operation by driving the transmission assembly 5; when sewing is completed, the limiting cylinder 71 retracts to release the limiting block 75, and at this time the limiting block 75 rotates under the action of the reset spring 72, so that the limiting hook 76 releases the transmission block 51, so as to perform a knotting operation of the sewing thread.

[0036] The sewing thread knotting mechanism of the present invention can realize the integrated operation of sewing by a sewing machine and automatic knotting of sewing thread, effectively improve the production and processing efficiency, and reduce the manual labor intensity.

[0037] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A sewing thread knotting mechanism, comprising: A fixing plate and a mounting seat; characterized in that the mounting seat can be detachably mounted on the lower end surface of the fixing plate; a receiving groove is provided on the upper end surface of the fixing plate; a needle assembly used for knotting the sewing thread can be rotatably mounted in the receiving groove; a transmission assembly for driving the needle assembly to rotate, a driving assembly for driving the transmission assembly, and a limiting assembly for limiting the transmission assembly are provided on the fixing seat; the output end of the driving assembly is transmission-connected with the input end of the transmission assembly; the output end of the limiting assembly can abut against the transmission assembly; the output end of the driving assembly is fixedly connected with the input end of the needle assembly after passing through the fixing plate.

2. A sewing thread knotting mechanism according to claim 1, characterized in that: The needle assembly includes: a connecting part, a Z-shaped plate, and a mounting plate; one end of the connecting part is fixedly connected to the output end of the transmission assembly, and the other end is hinged to one end of the Z-shaped plate; the Z-shaped plate is rotatably installed in the accommodating groove through a screw rod; the other end of the Z-shaped plate is detachably connected to the mounting plate; a thread pushing needle and a thread hooking needle are arranged opposite to each other on the mounting plate.

3. A sewing thread knotting mechanism according to claim 2, characterized in that: The thread pushing needle comprises: a first needle body and a thread pushing portion; one end of the first needle body is fixedly connected to the mounting plate, and the other end is fixedly connected to the thread pushing portion; the first needle body and the thread pushing portion are integrally formed.

4. A sewing thread knotting mechanism according to claim 2, characterized in that: The thread hooking needle comprises: a second needle body and a thread hooking part; one end of the second needle body is fixedly connected to the mounting plate, and the other end is fixedly connected to the thread hooking part; the second needle body and the thread hooking part are integrally formed.

5. A sewing thread knotting mechanism according to claim 2, characterized in that: The mounting plate is integrally formed with the thread pushing needle and the thread hooking needle.

6. A sewing thread knotting mechanism according to claim 2, characterized in that: The distance between the thread hooking needle and the thread pushing needle is 0.5cm-1cm.

7. A sewing thread knotting mechanism according to claim 2, characterized in that: The transmission assembly includes: a transmission block, a connecting piece, and a guide rod; a mounting cavity is provided on the mounting seat; the transmission block can be slidably installed in the mounting cavity; one end of the transmission block is fixedly connected to the driving assembly; one end of the guide rod is detachably connected to the other end of the transmission block, and its other end passes through the mounting seat to the outside of the mounting seat; the guide rod is slidably connected to the mounting seat; a limiting head is provided on the end of the guide rod away from the mounting seat; a sliding groove adapted to the connecting piece is provided on the fixing plate; one end of the connecting piece is detachably connected to an end of the transmission block close to the guide rod; the other end is fixedly connected to the connecting part after passing through the sliding groove.

8. A sewing thread knotting mechanism according to claim 7, characterized in that: The driving assembly includes: a driving cylinder and a push block; the driving cylinder is detachably mounted on the mounting seat, and its output end is fixedly connected to the input end of the push block; the output end of the push block passes through the side wall of the mounting seat and is placed in the mounting cavity, and is fixedly connected to the transmission block.

9. A sewing thread knotting mechanism according to claim 7, characterized in that: The limit assembly comprises: a limit cylinder, a return spring, an L-shaped plate, a fixed block, and a limit block; the limit cylinder is connected and installed on the mounting seat through the L-shaped plate; the mounting seat is provided with a through slot connected to the mounting cavity; the fixed block is installed in the through slot; the L-shaped plate is provided with a clamping slot adapted to the through slot; one end of the limit block is hinged to the fixed block, and the other end can abut against the output end of the limit cylinder after passing through the clamping slot; a limit hook is provided on the limit block; the limit hook can abut against one end of the transmission block away from the push block; one end of the return spring is fixedly connected to the L-shaped plate, and the other end is fixedly connected to one end of the limit block close to the limit cylinder.

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