Transmission mechanism of sewing machine

Abstract

The transmission mechanism of the sewing machine comprises a first transmission assembly and a second transmission assembly, the first transmission assembly comprises a main shaft and an eccentric wheel assembly, the eccentric wheel assembly comprises a rotating sleeve block, a first eccentric wheel and a second eccentric wheel, the rotating sleeve block is sleeved on the main shaft in a rotating mode, and the first eccentric wheel and the second eccentric wheel are arranged in linkage with the rotating sleeve block. A first driven wheel for driving the rotating sleeve block to rotate is arranged on the rotating sleeve block, the first driven wheel is connected with a first driving wheel through a chain or a belt, and the first driving wheel is connected with a first motor; the second transmission assembly comprises a needle rod, a second driven wheel connected with the needle rod, a second driving wheel connected with the second driven wheel through a chain or a belt, and a second motor connected with the second driving wheel. Through the arrangement of the first transmission assembly and the second transmission assembly, independent control over the feed dog and independent control over rotation of the needle rod can be achieved, and therefore the diversity and variability of the sewing process and the sewing quality are changed and improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile lighting, and more specifically to a transmission mechanism of a sewing machine. Background Art

[0002] Sewing machines in the prior art have the problem of inconvenient adjustment in sewing patterns and changing styles. For example, the eccentric wheel assembly is usually fixed on the main shaft, and the pattern can only be changed constantly with the movement of the main shaft. In addition, the needle bar in the prior art cannot be independently rotated and controlled. Therefore, how to improve the prior art and optimize the transmission mechanism to achieve the adjustment of the diversity of sewing processes has become the direction of our thinking. Summary of the invention

[0003] The utility model overcomes the shortcomings of the prior art and provides a transmission mechanism of a sewing machine. By setting a first transmission assembly and a second transmission assembly, the separate control of the feed dog and the separate control of the needle bar rotation can be achieved, thereby changing and improving the diversity and variability of the sewing process and the sewing quality.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A transmission mechanism of a sewing machine comprises a first transmission assembly and a second transmission assembly, the first transmission assembly comprises a main shaft and an eccentric wheel assembly, the eccentric wheel assembly comprises a rotating sleeve block rotatably sleeved on the main shaft and a first eccentric wheel and a second eccentric wheel linked with the rotating sleeve block, the rotating sleeve block is provided with a first driven wheel driving the rotating sleeve block to rotate, the first driven wheel is connected to a first driving wheel through a chain or a belt, the first driving wheel is connected to a first motor, the second transmission assembly comprises a needle bar, a second driven wheel connected to the needle bar, a second driving wheel connected to the second driven wheel through a chain or a belt, and a second motor connected to the second driving wheel.

[0006] Preferably, the first motor is configured as a stepper motor or a servo motor, and the second motor is configured as a stepper motor or a servo motor.

[0007] Preferably, the first motor and the second motor are both mounted on the sewing machine body.

[0008] Preferably, the rotating sleeve block comprises a shaft sleeve portion and an insert block portion, and the first eccentric wheel and the driven wheel are both sleeved on the shaft sleeve portion.

[0009] Preferably, an annular groove is provided on the first eccentric wheel toward the insertion block portion, a guide groove is provided in the insertion block portion, a guide block is slidably provided on the guide groove, the second eccentric wheel is connected to the guide block, and the guide block is connected to a connecting rod located in the annular groove.

[0010] Preferably, the second eccentric wheel is connected to a swing fork, and the swing fork is provided with a through hole for the feeding shaft to pass through.

[0011] Beneficial effects of the utility model:

[0012] The utility model has a reasonable structural design. By setting the first transmission assembly and the second transmission assembly, the separate control of the feed dog and the separate control of the needle bar rotation can be achieved, thereby changing and improving the diversity and variability of the sewing process and the sewing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model;

[0014] Figure 2 It is a structural schematic diagram reflecting the second transmission assembly in a specific embodiment of the utility model;

[0015] Figure 3 It is a structural schematic diagram reflecting the first transmission component in a specific embodiment of the utility model;

[0016] Figure 4 It is a structural schematic diagram reflecting the rotating sleeve block in a specific embodiment of the utility model;

[0017] Figure 5 This is a schematic diagram of the structure of the first eccentric wheel in a specific embodiment of the utility model;

[0018] Figure 6 This is a schematic diagram of the structure of the second eccentric wheel, the guide block and the connecting rod in a specific embodiment of the utility model;

[0019] Figure 7 It is a structural schematic diagram reflecting a swing fork according to a specific embodiment of the utility model.

[0020] In the figure: 100, first transmission assembly; 200, second transmission assembly; 300, sewing machine body; 1, main shaft; 2, eccentric wheel assembly; 3, rotating sleeve block; 31, sleeve portion; 32, insert block portion; 321, guide groove; 322, guide block; 323, connecting rod; 4, first eccentric wheel; 41, annular groove; 5, second eccentric wheel; 6, first driven wheel; 61, first driving wheel; 62, first motor; 7, swing fork; 71, perforation; 8, needle bar; 81, second driven wheel; 82, second driving wheel; 83, second motor. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] like Figure 1-7 As shown, a transmission mechanism of a sewing machine includes a first transmission assembly 100 and a second transmission assembly 200. The first transmission assembly 100 includes a main shaft 1 and an eccentric wheel assembly 2. The eccentric wheel assembly 2 includes a rotating sleeve block 3 rotatably sleeved on the main shaft 1 and a first eccentric wheel 4 and a second eccentric wheel 5 linked to the rotating sleeve block 3. The rotating sleeve block 3 is provided with a first driven wheel 6 that drives the rotating sleeve block 3 to rotate. The first driven wheel 6 is connected to a first driving wheel 61 through a chain or a belt. The first driving wheel 61 is connected to a first motor 62. The second transmission assembly 200 includes a needle bar 8, a second driven wheel 81 connected to the needle bar 8, a second driving wheel 82 connected to the second driven wheel 81 through a chain or a belt, and a second Motor 83; the first motor 62 is configured as a stepper motor or a servo motor, and the second motor 83 is configured as a stepper motor or a servo motor; the first motor 62 and the second motor 83 are both arranged on the sewing machine body 300; the rotating sleeve block 3 includes a shaft sleeve portion 31 and an insertion block portion 32, and the first eccentric wheel 4 and the driven wheel are both sleeved on the shaft sleeve portion 31; an annular groove 41 is provided on the first eccentric wheel 4 facing the insertion block portion 32, a guide groove 321 is provided in the insertion block portion 32, a guide block 322 is slidably provided on the guide groove 321, the second eccentric wheel 5 is connected to the guide block 322, and the guide block 322 is connected to a connecting rod 323 located in the annular groove 41; the second eccentric wheel 5 is connected to a swing fork 7, and the swing fork 7 is provided with a through hole 71 for the feeding shaft to pass through.

[0023] By adopting the above technical solution, in the present invention, by setting the first transmission assembly 100 and the second transmission assembly 200, the feed dog can be controlled separately and the needle bar 8 can be controlled separately. The rotating sleeve 3 is sleeved on the main shaft 1, and the rotating sleeve 3 is driven to rotate by the structure of the motor, the driving wheel and the driven wheel. In this way, the feed dog can be independently controlled and adjusted by the motor, so that the diversity, variability and sewing quality of the sewing process can be changed and improved.

[0024] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A transmission mechanism for a sewing machine, characterized in that: The invention comprises a first transmission assembly (100) and a second transmission assembly (200), wherein the first transmission assembly (100) comprises a main shaft (1) and an eccentric wheel assembly (2), wherein the eccentric wheel assembly (2) comprises a rotating sleeve (3) rotatably sleeved on the main shaft (1), and a first eccentric wheel (4) and a second eccentric wheel (5) arranged in linkage with the rotating sleeve (3), wherein the rotating sleeve (3) is provided with a first driven wheel (6) for driving the rotating sleeve (3) to rotate, wherein the first driven wheel (6) is connected to a first driving wheel (61) via a chain or a belt, and the first driving wheel (61) is connected to a first motor (62), and the second transmission assembly (200) comprises a needle bar (8), a second driven wheel (81) connected to the needle bar (8), a second driving wheel (82) connected to the second driven wheel (81) via a chain or a belt, and a second motor (83) connected to the second driving wheel (82).

2. The transmission mechanism of a sewing machine according to claim 1, characterized in that: The first motor (62) is configured as a stepper motor or a servo motor, and the second motor (83) is configured as a stepper motor or a servo motor.

3. A transmission mechanism for a sewing machine according to claim 1 or 2, characterized in that: The first motor (62) and the second motor (83) are both mounted on the sewing machine body (300).

4. The transmission mechanism of a sewing machine according to claim 3, characterized in that: The rotating sleeve block (3) comprises a shaft sleeve portion (31) and an insert block portion (32), and the first eccentric wheel (4) and the driven wheel are both sleeved on the shaft sleeve portion (31).

5. The transmission mechanism of a sewing machine according to claim 4, characterized in that: An annular groove (41) is provided on the first eccentric wheel (4) at a position facing the insert block portion (32), a guide groove (321) is provided in the insert block portion (32), a guide block (322) is slidably provided on the guide groove (321), the second eccentric wheel (5) is connected to the guide block (322), and the guide block (322) is connected to a connecting rod (323) located in the annular groove (41).

6. The transmission mechanism of a sewing machine according to claim 5, characterized in that: The second eccentric wheel (5) is connected to a swing fork (7), and the swing fork (7) is provided with a through hole (71) for the feeding shaft to penetrate.

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