阅读说明：本技术 一种缝纫机 (Sewing machine ) 是由 芈韶雷 赵林蔚 林昌盛 于 2019-04-24 设计创作，主要内容包括：本发明公开了一种缝纫机,其包括主轴、主轴抬牙偏心轮以及抬牙调节组件。主轴抬牙偏心轮固定在主轴上。抬牙调节组件安装在所述主轴上并用于调节所述缝纫机的抬牙偏心量；抬牙调节组件包括偏心轮一以及偏心轮二偏心台阶。偏心轮二套在主轴上；偏心轮一套设在主轴上并具有内圆柱面和外圆柱面；偏心轮一的内圆柱面与所述主轴抬牙偏心轮同心设置；偏心轮一的外圆柱面与所述偏心轮二同轴。本发明中缝纫机的抬牙调节组件结构简单、操作便捷,改变了现有主轴抬牙偏心轮相对位置不可调节的现象,能够针对不同的缝制工艺及要求,有效改善不同类别布料时出现的错层、送布效率低、褶皱等缝制缺陷。(The invention discloses a sewing machine which comprises a main shaft, a main shaft lifting tooth eccentric wheel and a lifting tooth adjusting assembly. The spindle tooth lifting eccentric wheel is fixed on the spindle. The feed lifting tooth adjusting assembly is arranged on the main shaft and is used for adjusting the feed lifting tooth eccentric amount of the sewing machine; the lifting tooth adjusting assembly comprises a first eccentric wheel and a second eccentric wheel eccentric step. The eccentric wheel II is sleeved on the main shaft; the eccentric wheel is sleeved on the main shaft and is provided with an inner cylindrical surface and an outer cylindrical surface; the inner cylindrical surface of the eccentric wheel I and the spindle tooth lifting eccentric wheel are arranged concentrically; the outer cylindrical surface of the first eccentric wheel is coaxial with the second eccentric wheel. The lifting tooth adjusting assembly of the sewing machine is simple in structure and convenient to operate, changes the phenomenon that the relative position of the existing main shaft lifting tooth eccentric wheel is not adjustable, and can effectively improve the sewing defects of staggered layers, low cloth feeding efficiency, folds and the like in different types of cloth according to different sewing processes and requirements.)

1. A sewing machine, comprising:

a main shaft (4);

the spindle tooth lifting eccentric wheel (4-1), the spindle tooth lifting eccentric wheel (4-1) is fixed on the spindle (4); characterized in that, the sewing machine further comprises:

the feed lifting tooth adjusting assembly (1) is arranged on the main shaft (4) and is used for adjusting the feed lifting tooth eccentric amount of the sewing machine;

wherein the tooth lifting adjustment assembly (1) comprises:

the eccentric wheel II (8) is sleeved on the main shaft (4);

the eccentric wheel I (3) is sleeved on the main shaft (4) and is provided with an inner cylindrical surface and an outer cylindrical surface, and the inner cylindrical surface of the eccentric wheel I (3) and the main shaft tooth lifting eccentric wheel (4-1) are arranged concentrically; the outer cylindrical surface of the eccentric wheel I (3) is coaxial with the eccentric wheel II (8).

2. The sewing machine according to claim 1, wherein an eccentric step is installed at one end of the eccentric wheel II (8), a sliding groove and a bolt are radially arranged at one end far away from the eccentric step along the main shaft (4), and the lifting tooth adjusting assembly (1) further comprises:

The adjusting slide block (6) is arranged in the sliding groove in a sliding manner;

the first ratchet wheel is arranged on the main shaft;

the first pawl is mounted on the adjusting slide block (6);

the reset torsion spring (5) is used for resetting the adjusting sliding block (6), and one end of the reset torsion spring (5) is sleeved on the plug pin.

3. The sewing machine according to claim 2, characterized in that the sewing machine further comprises a housing, the eccentric wheel (8) is provided with a notch (2-1) at the outer side, and the feed lifting adjusting assembly (1) further comprises:

one end of the adjusting button (7) is arranged on the shell, the other end of the adjusting button (7) is provided with an arc surface (7-1), and the arc surface (7-1) is opposite to the notch (2-1).

4. Sewing machine as in claim 1, characterized in that said eccentric two (8) is rotatable with respect to the main shaft (4).

5. Sewing machine as in claim 3, characterized by that, the said runner offers the oil groove on the interface contacted with edge of the regulating slide (6).

6. The sewing machine according to claim 3, characterized in that the eccentric wheel II (8) is of a circular ring structure, and one end of the adjusting slider (6) close to the notch (2-1) is lower than the outer side of the circular ring of the eccentric wheel II (8) and higher than the bottom of the notch (2-1).

7. The sewing machine according to any of the claims 2, characterized in that it further comprises a feed assembly (2), the feed assembly (2) comprising:

the eccentric wheel III (22) is sleeved on the main shaft (4), and one end of the eccentric wheel III is provided with a sliding groove;

and the fixed block (21) is fixedly arranged on the main shaft (4), is accommodated in the sliding groove and can slide in the sliding groove.

8. Sewing machine as in claim 7, characterized in that the fixed block (21) is fixed to said ratchet wheel I for indirect fixing to the main shaft (4).

9. Sewing machine as in claim 8, characterized in that said ratchet-one is integral with the fixed block (21).

10. Sewing machine as in claim 3, characterized in that said adjustment button (7) is provided with anti-slip threads.

Technical Field

The invention relates to the field of sewing machines, in particular to a sewing machine.

Background

The feed dog of the existing feed mechanism forms a feed track similar to an ellipse by the combined action of the swing in the horizontal direction and the feed lifting dog in the vertical direction. The horizontal swinging is composed of a cloth feeding eccentric fixed on the main shaft, the eccentric amount of the cloth feeding eccentric is adjustable, and the cloth feeding eccentric has a certain relative angle relative to the eccentric center of the upper and lower lifting teeth. The feed dog eccentric center and the feed eccentric center act on the feed dog together through a middle transmission mechanism, so that the aim of conveying the cloth to achieve sewing is fulfilled. However, the eccentric center of the upper and lower lifting teeth of the existing sewing machine and the main shaft are integrated into a whole, and the angle and the size of the existing sewing machine are single fixed values, so that the real-time adjustment according to the actual sewing requirement cannot be changed. Aiming at the problems of various sewing processes, variability and continuous improvement of sewing quality, the eccentric structure of the lifting tooth can not completely meet the requirements of sewing different types of cloth in the market. The upper layer cloth and the lower layer cloth are easy to be staggered, the same machine cannot simultaneously meet the sewing defects of knitting and tatting, no wrinkles of the cloth, low cloth feeding efficiency and the like. Therefore, the feed mechanism cannot adjust the tooth lifting angle and the tooth lifting amount of the feed track according to actual requirements, and has a narrow application range. The cloth feeding mechanism of the sewing machine with the publication number of CN103374794B has a complex structural scheme, is troublesome in adjustment mode and cannot be adjusted outside the sewing machine body. And the existing feed lifting adjusting component mainly has two eccentric structures, and cannot realize the problem of adjusting the eccentric amount of the sewing machine in real time from the outside. I.e. when adjustment is required, disassembly and reassembly are required.

Disclosure of Invention

In view of the above, there is a need for an improved solenoid valve, which can prevent the core inside from being corroded by the fluid medium and has a long service life.

The invention aims to provide a sewing machine, which solves the problem that the two eccentric structures of the existing feed lifting adjusting assembly need to be disassembled again and then assembled and adjusted, but the feed lifting eccentric amount of the sewing machine cannot be adjusted in real time from the outside.

In order to achieve the purpose, the invention provides the following technical scheme: a sewing machine, comprising:

a main shaft;

the main shaft tooth lifting eccentric wheel is fixed on the main shaft;

the sewing machine further includes:

the lifting tooth adjusting assembly is arranged on the main shaft and is used for adjusting the eccentric amount of the lifting tooth of the sewing machine;

wherein the tooth lifting adjustment assembly comprises:

the eccentric wheel II is sleeved on the main shaft;

the eccentric wheel I is sleeved on the main shaft and is provided with an inner cylindrical surface and an outer cylindrical surface, and the inner cylindrical surface of the eccentric wheel I and the eccentric wheel of the main shaft tooth lifting are concentrically arranged; the outer cylindrical surface of the first eccentric wheel is coaxial with the second eccentric wheel.

Preferably, eccentric step is installed to the one end of eccentric wheel two, and the one end of keeping away from eccentric step has radially seted up the spout and has installed the bolt along the main shaft, the lifting teeth adjusting part still includes:

The adjusting slide block is arranged in the sliding groove in a sliding manner;

the first ratchet wheel is arranged on the main shaft;

the first pawl is mounted on the adjusting slide block;

the reset torsion spring is used for resetting the adjusting sliding block, and one end of the reset torsion spring is sleeved on the plug pin.

Preferably, the sewing machine further comprises a housing, notches are formed in the two outer sides of the eccentric wheel, and the feed lifting adjusting assembly further comprises:

one end of the adjusting button is arranged on the shell, the other end of the adjusting button is provided with an arc surface, and the arc surface is opposite to the notch.

Preferably, the two eccentric wheels can rotate relative to the main shaft.

Preferably, the sliding groove is provided with an oil groove on an interface contacted with the edge of the adjusting slide block.

Preferably, the eccentric wheel II is of a circular ring structure, and one end, close to the notch, of the adjusting slide block is lower than the outer side of the circular ring of the eccentric wheel II and higher than the bottom of the notch.

Preferably, the sewing machine further comprises a cloth feeding assembly, and the cloth feeding assembly comprises:

the eccentric wheel III is sleeved on the main shaft, and one end of the eccentric wheel III is provided with a sliding groove;

and the fixed block is fixedly arranged on the main shaft, accommodated in the sliding groove and capable of sliding in the sliding groove.

Preferably, the fixed block is fixed on the first ratchet wheel to be indirectly fixed on the main shaft.

Preferably, the first ratchet wheel and the fixed block are integrally arranged.

Preferably, the adjusting button is provided with anti-skid grains.

Compared with the prior art, the invention has the beneficial effects that:

1. the lifting tooth adjusting assembly of the sewing machine is simple in structure and convenient to operate, and the phenomenon that the relative position of the existing spindle lifting tooth eccentric wheel is not adjustable is changed. According to the invention, the initial phase of the eccentric wheel of the lifting tooth of the main shaft relative to the cloth feeding and the cloth puncturing is adjusted, and the size of the lifting tooth amount is adjusted, so that the phase relation between the tooth cloth feeding and the needle cloth puncturing is adjusted, the running track of the cloth feeding tooth is changed, the sewing defects of staggered layers, low cloth feeding efficiency, folds and the like in the process of sewing different types of cloth can be effectively improved according to different sewing processes and requirements, and the sewing efficiency and the sewing quality are improved.

2. The eccentric cam of the main shaft lifting tooth, the eccentric cam I and the eccentric cam II are arranged, so that the eccentric cam of the lifting tooth of the sewing machine can be adjusted externally in real time under the condition of not disassembling the sewing machine, and the sewing machine is suitable for different sewing conditions.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a tooth lifting adjusting assembly;

fig. 3 is a schematic diagram of an exploded structure of the feed assembly.

In the figure: the feed mechanism comprises a feed lifting adjusting component 1, a feed feeding component 2, a fixed block 21, a third eccentric wheel 22, a feed feeding connecting rod 23, a sliding wheel 24, an open needle eccentric cam 25, a cylindrical pin 26, an axis screw 27, an eccentric cam spring 28, a second pawl 29, a second ratchet wheel 30, a first screw 31, a second screw 32, a first eccentric wheel 3, a main shaft 4, a main shaft feed lifting eccentric wheel 4-1, a reset torsion spring 5, an adjusting slide block 6, an adjusting button 7, an arc surface 7-1 and a second eccentric wheel 8.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment provides a sewing machine, which is used for solving the problem that the two eccentric structures of the existing feed lifting adjusting assembly need to be disassembled again and then assembled and adjusted, and the feed lifting eccentric amount of the sewing machine cannot be adjusted in real time. Meanwhile, the problem that the real-time adjustment according to actual sewing needs cannot be changed due to the fact that the angle and the size of a spindle lifting tooth eccentric wheel 4-1 and a spindle 4 of an existing sewing machine are of a single fixed value is solved.

Referring to fig. 1 to 3, the sewing machine includes a feed lifting adjusting assembly 1, a cloth feeding assembly 2, a main shaft 4, and a main shaft feed lifting eccentric 4-1.

Wherein, the feed lifting teeth adjusting component 1 is arranged on the main shaft 4 and is used for adjusting the feed lifting teeth eccentricity of the sewing machine. The spindle 4 may be of cylindrical construction. The spindle tooth lifting eccentric wheel 4-1 is fixed on the spindle 4. The lifting tooth adjusting component 1 comprises a first eccentric wheel 3, a reset torsion spring 5, an adjusting slide block 6, an adjusting button 7, a second eccentric wheel 8, an eccentric step, a first ratchet wheel and a first pawl.

The eccentric wheel II 8 is sleeved on the main shaft 4. The eccentric wheel I3 is sleeved on the main shaft 4 and is provided with an inner cylindrical surface and an outer cylindrical surface. The inner cylindrical surface of the eccentric wheel I3 and the spindle tooth lifting eccentric wheel 4-1 are arranged concentrically. The outer cylindrical surface of the eccentric wheel I3 is coaxial with the eccentric wheel II 8. In the embodiment, the eccentric unit of the lifting tooth of the main shaft, the eccentric unit I and the eccentric unit II are arranged, so that the eccentric amount of the lifting tooth of the sewing machine can be adjusted externally in real time under the condition of not disassembling the sewing machine, and different sewing conditions can be adapted. In this embodiment, one end of the eccentric wheel II 8 can be further provided with an eccentric step. One end of the eccentric wheel II 8, which is far away from the eccentric step, is provided with a sliding groove and a bolt along the radial direction of the main shaft 4. The eccentric wheel II 8 can rotate relative to the main shaft 4.

The adjusting slide block 6 is arranged in the chute in a sliding way. The sliding groove is provided with an oil groove on an interface contacted with the edge of the adjusting slide block 6. The oil groove can be convenient for lubricating oil to pour into the spout into, reduces the frictional force between the regulating slide 6 and the spout when sliding. One end of the adjusting slide block 6 close to the notch 2-1 is lower than the outer side of the circular ring of the eccentric wheel II 8 and higher than the bottom of the notch 2-1. One side of the sliding groove is provided with a bolt.

The first ratchet wheel is arranged on the main shaft. The first pawl is mounted on the adjusting slide 6. The reset torsion spring 5 is used for resetting the adjusting slide block 6. One end of the reset torsion spring 5 is sleeved on the plug pin, and the other end of the reset torsion spring is fixedly connected with the first pawl. This embodiment can be through manual pushing down adjustment slider 6 for adjustment slider 6 slides up and down along the inner wall of spout. The first pawl is separated from the first ratchet wheel when the adjusting slide block 6 slides out of the slide groove, and is meshed with the first ratchet wheel when the adjusting slide block 6 slides into the slide groove.

The sliding of the adjusting slider 6 can also be realized by the adjusting button 7 in the present embodiment. The method specifically comprises the following steps: the sewing machine further includes a housing. One end of the adjusting button 7 is arranged on the shell. The other end of the adjusting button 7 is provided with a circular arc surface 7-1. The arc surface 7-1 is opposite to the notch 2-1. Namely, the arc surface 7-1 and the adjusting slide block 6 are in point-surface contact. When the adjusting button 7 is pressed down, the arc surface 7-1 contacts with the adjusting slide block 6 and pushes the adjusting slide block 6. The adjusting button 7 is provided with anti-slip lines to avoid the slip phenomenon. The bottom of the notch 2-1 has a limiting effect on the adjusting button 7, and the adjusting button 7 is prevented from excessively moving, so that the structure of the cloth feeding assembly 2 on the sewing machine is stable.

The cloth feeding component 2 is connected with the feed lifting adjusting component 1 and is used for adjusting the needle pitch of the sewing machine. The cloth feeding assembly 2 may comprise a fixed block 21 and an eccentric wheel three 22. The eccentric wheel III 22 is sleeved on the main shaft 4, and one end of the eccentric wheel III is provided with a sliding groove. The fixing block 21 is fixed to the main shaft 4, and is accommodated in the sliding groove and can slide in the sliding groove. In this embodiment, the fixing block 21 can be locked on the main shaft 4 by a first screw 31. In this embodiment, the fixing block 21 can be indirectly fixed on the main shaft 4 by being fixed on the ratchet wheel I. The first ratchet wheel and the fixed block 21 can be arranged integrally or separately.

When the adjustment button 7 is pressed down, the adjustment button 7 pushes the adjustment slider 6 down. The adjusting slide block 6 drives the pawl I to be separated from the ratchet I. At this time, the feed lifting adjusting assembly 1 is separated from the feed conveying assembly 2, and independent adjustment of the feed conveying size and the feed lifting size and the phase relation between the feed conveying and the feed lifting can be realized.

As shown in fig. 3, the cloth feeding assembly 2 may further include a cloth feeding link 23, a sliding wheel 24, a needle opening eccentric cam 25, an eccentric cam spring 28, a second pawl 29, a second ratchet 30, a first screw 31, and a second screw 32. The cloth feeding connecting rod 23 is sleeved on the eccentric wheel III 22 and is provided with an inner cylindrical surface. The inner cylindrical surface of the cloth feeding connecting rod 23 is coaxial with the outer cylindrical surface of the eccentric wheel III 22. The outer cylindrical surface of the sliding wheel 24 is provided with a plane which is closely matched with the eccentric wheel III 22, and the inner cylindrical surface of the sliding wheel 24 is coaxial with the needle opening eccentric cam 25. The sliding wheel 24 is sleeved on the main shaft 4.

The end of the needle opening eccentric cam 25 far away from the sliding wheel 24 is provided with a cylindrical pin 26. One end of an eccentric cam spring 28 is sleeved on the cylindrical pin 26 and is fixed on the needle opening eccentric cam 25 through a shaft position screw 27. The second pawl 29 is arranged on one end of the needle opening eccentric cam 25 far away from the sliding wheel 24 in a sliding mode and connected with the other end of the eccentric cam spring 28. The second ratchet wheel 30 is meshed with the second pawl 29. When the cloth feeding size is adjusted, the second ratchet wheel 30 is disengaged from the second pawl 29. The second ratchet wheel 30 is locked on the main shaft 4 through a second screw 32. For the specific adjustment of the cloth feeding size of the cloth feeding assembly 2, reference may be made to the cloth feeding mechanism of the sewing machine with publication number CN106637707A and the cloth feeding assembly with publication number CN206070127U, which are not described in detail in this embodiment.

In the embodiment, when the angle of the spindle lifting eccentric wheel 4-1 needs to be adjusted, the spindle 4 is rotated only by pressing the adjusting button 7. When the arc surface 7-1 of the adjusting button 7 is clamped in the adjusting slide block 6, on one hand, the adjusting button 7 pushes the adjusting slide block 6 downwards along the sliding groove in a sliding manner, so that the first pawl on the adjusting slide block 6 is separated from the first ratchet wheel. At this time, the lifting tooth adjusting assembly 1 is separated from the main shaft 4. The main shaft 4 is continuously rotated, and the eccentric wheel II 8, the eccentric wheel 4-1 of the main shaft lifting tooth and the eccentric wheel 3 are coaxially arranged because the arc surface of the adjusting button 7 is in point-surface contact with the adjusting slide block 6. Therefore, the mutual positions of the eccentric wheel II 8, the eccentric wheel 3 and the main shaft feed lifting eccentric wheel 4-1 are changed, namely the actual distance between the eccentric wheel II 8 and the center of the main shaft 4 and the relative angle are changed.

When the adjustment is completed, the adjustment button 7 is released. The first pawl on the adjusting slide block 6 is reengaged with the first ratchet wheel due to the action of the reset torsion spring 5. At the moment, the eccentric wheel II 8, the main shaft 4 and the cloth feeding assembly 2 are fixed again, so that the eccentric adjustment of the upper and lower feed lifting teeth of the cloth feeding teeth is realized, and the requirements of different types of cloth sewing processes are matched.

The lifting tooth adjusting assembly 1 of the sewing machine in the embodiment is simple in structure and convenient to operate, and by arranging three eccentric units, namely the spindle lifting tooth eccentric wheel, the eccentric wheel I3 and the eccentric wheel II 8, the eccentric amount of the lifting tooth of the sewing machine can be adjusted in real time on the outside under the condition that the sewing machine is not disassembled to adapt to different sewing conditions, and the phenomenon that the relative position of the existing spindle lifting tooth eccentric wheel 4-1 is not adjustable is changed. In the embodiment, the phase relation between the tooth cloth feeding and the needle punched cloth is realized by adjusting the initial phase of the eccentric wheel 4-1 of the lifting tooth of the main shaft relative to the cloth feeding and the punched cloth and the size of the lifting tooth amount, the running track of the tooth of the cloth feeding is changed, the sewing defects of staggered layers, low cloth feeding efficiency, folds and the like in different types of cloth can be effectively improved according to different sewing processes and requirements, and the sewing efficiency and the sewing quality are improved.

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