Eccentric wheel structure of sewing machine

Abstract

The eccentric wheel structure of the sewing machine 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. The driven wheel is connected with a driving wheel through a chain or a belt, and the driving wheel is connected with a motor. The feed dog is reasonable in design, the rotating sleeve block is arranged on the main shaft in a sleeved mode, the rotating sleeve block is driven to rotate through the structure of the motor, the driving wheel and the driven wheel, and therefore the feed dog can be independently controlled and adjusted through the motor, and diversity and variability of the sewing technology and 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 an eccentric wheel structure of a sewing machine. Background Art

[0002] The feed teeth of the cloth feeding mechanism of the sewing machine in the prior art form a cloth feeding track similar to an ellipse by the horizontal swing and the lifting teeth in the up and down directions. The upper and lower lifting teeth eccentricities are an integrated structure with the main shaft, and the horizontal swing is composed of a cloth feeding eccentricity fixed on the main shaft, the eccentricity of which is adjustable and has a certain relative angle with respect to the upper and lower lifting teeth eccentricities. The lifting teeth eccentricity and the cloth feeding eccentricity act on the cloth feeding teeth through the intermediate transmission mechanism to realize the cloth feeding and achieve the purpose of sewing. However, since the upper and lower lifting teeth eccentricities of the current sewing machine are an integrated structure with the main shaft, their angles and sizes are single fixed values, and therefore cannot be changed and adjusted in real time according to actual sewing needs. Summary of the invention

[0003] The utility model overcomes the shortcomings of the prior art and provides an eccentric wheel structure of a sewing machine with a reasonable structural design. A rotating sleeve block is sleeved on the main shaft and driven to rotate by a motor, a driving wheel and a driven wheel. In this way, the feed dog can be independently controlled and adjusted by the motor, so that the diversity and variability of the sewing process and the sewing quality can be changed and improved.

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

[0005] An eccentric wheel structure of a sewing machine comprises a main shaft and an eccentric wheel assembly, wherein 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; a driven wheel driving the rotating sleeve block is arranged on the rotating sleeve block, the driven wheel is connected to a driving wheel through a chain or a belt, and the driving wheel is connected to a motor.

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

[0007] 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.

[0008] 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.

[0009] 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.

[0010] Beneficial effects of the utility model:

[0011] The utility model has a reasonable structural design. The rotating sleeve is sleeved on the main shaft and 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 and variability of the sewing process and the sewing quality can be changed and improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model;

[0013] Figure 2 It is a structural schematic diagram reflecting the rotating sleeve block in a specific embodiment of the utility model;

[0014] Figure 3 This is a schematic diagram of the structure of the first eccentric wheel in a specific embodiment of the utility model;

[0015] Figure 4 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;

[0016] Figure 5 It is a structural schematic diagram reflecting a swing fork according to a specific embodiment of the utility model.

[0017] In the figure: 1, main shaft; 2, eccentric wheel assembly; 3, rotating sleeve block; 31, sleeve part; 32, insert block part; 321, guide groove; 322, guide block; 323, connecting rod; 4, first eccentric wheel; 41, annular groove; 5, second eccentric wheel; 6, driven wheel; 61, driving wheel; 62, motor; 7, swing fork; 71, perforation. DETAILED DESCRIPTION

[0018] 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.

[0019] like Figure 1-5As shown, an eccentric wheel structure of a sewing machine includes a main shaft 1 and an eccentric wheel assembly 2, wherein 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 with the rotating sleeve block 3, the rotating sleeve block 3 is provided with a driven wheel 6 driving the rotating sleeve block 3 to rotate, the driven wheel 6 is connected to a driving wheel 61 through a chain or a belt, and the driving wheel 61 is connected to a motor 62; the motor 62 is configured as a stepping motor 62 or a servo motor 62; the rotating sleeve block 3 includes The shaft sleeve portion 31 and the insert block portion 32, the first eccentric wheel 4 and the driven wheel 6 are all sleeved on the shaft sleeve portion 31; an annular groove 41 is provided on the first eccentric wheel 4 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; 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.

[0020] By adopting the above technical solution, in the utility model, the rotating sleeve block 3 is sleeved on the main shaft 1, and the rotating sleeve block 3 is driven to rotate through the structure of the motor 62, the driving wheel 61 and the driven wheel 6. In this way, the feed dog can be independently controlled and adjusted by the motor 62, so that the diversity, variability and sewing quality of the sewing process can be changed and improved.

[0021] 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. An eccentric wheel structure for a sewing machine, comprising a main shaft (1) and an eccentric wheel assembly (2), characterized in that: 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) which are arranged in linkage with the rotating sleeve (3); a driven wheel (6) is arranged on the rotating sleeve (3) to drive the rotating sleeve (3) to rotate; the driven wheel (6) is connected to a driving wheel (61) via a chain or a belt; and the driving wheel (61) is connected to a motor (62).

2. The eccentric wheel structure of a sewing machine according to claim 1, characterized in that: The motor (62) is configured as a stepper motor (62) or a servo motor (62).

3. An eccentric wheel structure for a sewing machine according to claim 1 or 2, 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 (6) are both sleeved on the shaft sleeve portion (31).

4. The eccentric wheel structure of a sewing machine according to claim 3, 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).

5. The eccentric wheel structure of a sewing machine according to claim 4, 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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