阅读说明：本技术 缝纫机传动结构 (Transmission structure of sewing machine ) 是由 朱广运 朱龙明 王健 于 2019-11-01 设计创作，主要内容包括：本发明提供的一种缝纫机传动结构,包括：用于安装在针板下方的旋梭机构；所述旋梭机构包括第三旋梭齿轮、旋梭轴、齿轮罩和旋梭座,所述旋梭轴穿入第三旋梭齿轮中并与其固定连接,所述旋梭轴顶部还传动连接旋梭；所述齿轮罩中部设有安装腔,所述齿轮罩一侧壁上设有开口；所述第三旋梭齿轮、旋梭轴安装在安装腔中；所述齿轮罩具有与旋梭座内侧壁相贴合的外侧壁。本发明改进齿轮罩的结构,缩小了齿轮罩的结构,进而可以减少旋梭座的尺寸；缩小机头的尺寸,其可以加工尺寸更小的特定的产品；在维修时不需要跟换整个机座,只需要单独拆开第旋梭机构,其更换和维修更加方便。(The invention provides a transmission structure of a sewing machine, comprising: a rotating shuttle mechanism arranged below the needle plate; the rotating shuttle mechanism comprises a third rotating shuttle gear, a rotating shuttle shaft, a gear cover and a rotating shuttle seat, the rotating shuttle shaft penetrates into the third rotating shuttle gear and is fixedly connected with the third rotating shuttle gear, and the top of the rotating shuttle shaft is also in transmission connection with the rotating shuttle; the middle part of the gear cover is provided with an installation cavity, and one side wall of the gear cover is provided with an opening; the third rotating shuttle gear and the rotating shuttle shaft are arranged in the mounting cavity; the gear cover is provided with an outer side wall which is attached to the inner side wall of the rotating shuttle seat. The invention improves the structure of the gear cover, reduces the structure of the gear cover, and further can reduce the size of the rotating shuttle seat; the size of the machine head is reduced, and a specific product with smaller size can be processed; the whole machine base does not need to be replaced during maintenance, and only the first rotating shuttle mechanism needs to be disassembled independently, so that the replacement and the maintenance are more convenient.)

1. A sewing machine transmission structure, characterized by comprising: a rotating shuttle mechanism arranged below the needle plate; the rotating shuttle mechanism comprises a third rotating shuttle gear, a rotating shuttle shaft, a gear cover and a rotating shuttle seat, the rotating shuttle shaft penetrates into the third rotating shuttle gear and is fixedly connected with the third rotating shuttle gear, and the top of the rotating shuttle shaft is also in transmission connection with the rotating shuttle; the middle part of the gear cover is provided with an installation cavity, and one side wall of the gear cover is provided with an opening; the third rotating shuttle gear and the rotating shuttle shaft are arranged in the mounting cavity; the gear cover is provided with an outer side wall which is attached to the inner side wall of the rotating shuttle seat; and a rotating shuttle seat door is arranged on one side of the rotating shuttle seat, a positioning hook is arranged on the upper part of the rotating shuttle seat door, and one end of the positioning hook is arranged on the side wall of the rotating shuttle seat through a fastening piece.

2. The sewing machine drive of claim 1, further comprising a belt drive comprising a lower shaft and a first main drive shaft; one end of the lower shaft is provided with a first synchronous wheel; one end of the first transmission main shaft is provided with a first rotating shuttle gear, and the other end of the first transmission main shaft is provided with a second synchronizing wheel; the first rotating shuttle gear is used for being in transmission connection with a machine head power device, and drives a first transmission main shaft to rotate under the driving of the machine head power device, and the first synchronizing wheel is in transmission connection with a second synchronizing wheel adjacent to the first synchronizing wheel through a synchronous belt; a second rotating shuttle gear is arranged at one end of the lower shaft far away from the first synchronous wheel; the second rotating shuttle gear extends into the opening and engages the third rotating shuttle gear.

3. The transmission structure of a sewing machine according to claim 2, wherein a bearing seat is installed on the lower shaft, a synchronous belt pressing wheel is installed on the bearing seat, the synchronous belt pressing wheel is installed at an end portion of the second synchronous wheel, and the other end of the synchronous belt pressing wheel is used for pressing the synchronous belt.

4. The sewing machine drive arrangement of claim 2, further comprising a thread press mechanism; the wire pressing mechanism comprises a wire pressing sheet and a tooth frame which are arranged at the bottom of the needle plate, the wire pressing sheet is fixedly connected with the tooth frame, and a guide groove is formed in the tooth frame.

5. The transmission structure of the sewing machine according to claim 3, further comprising a crank transmission mechanism, wherein the crank transmission mechanism comprises a first crank, a connecting rod and a second crank, and the first crank is in transmission connection with the second crank through the connecting rod; the tail end of the first crank is provided with a sliding column; the sliding column is inserted into the tooth rack and moves along the guide groove under the driving of the first crank.

6. The transmission structure of sewing machine according to claim 4 or 5, further comprising a second main transmission shaft, one end of the second main transmission shaft is in transmission connection with the head power device and is used for swinging up and down under the driving of the head power device.

7. The transmission structure of sewing machine according to claim 6, wherein the second main transmission shaft is provided at the other end thereof with a connecting seat, one end of the second main transmission shaft is inserted into a lower portion of the connecting seat, and an upper portion of the connecting seat is hinged with the tooth holder for driving the tooth holder to swing up and down.

8. The transmission structure of a sewing machine according to claim 7, further comprising a frame, wherein the belt transmission mechanism, the crank transmission mechanism and the second main transmission shaft are installed in the frame, and the needle bed thereof is installed on the top of the frame.

Technical Field

The invention relates to the field of sewing machine devices, in particular to a transmission structure of a sewing machine.

Background

At present, a transmission structure of the existing sewing machine adopts various gears to be meshed with each other for transmission, and the overall structure size is large.

For example, patent document CN200720146583.4 discloses a "multi-head embroidery sewing machine", in which independent motors are provided for the respective heads of the sewing machine to individually drive the various mechanical elements of the needle bar, the thread take-up lever, and the presser foot; a motor common to each of the plurality of shuttles for driving the shuttles respectively provided below the respective sewing machine heads; and a transmission mechanism for transmitting the rotation of the common motor to the shuttles of the respective sewing machine heads. The machine head is large in size and is not suitable for processing specific products with smaller sizes, such as children shoes and the like.

Disclosure of Invention

Technical problem to be solved

The invention aims to provide a transmission structure of a sewing machine, which overcomes the defects that the conventional transmission mechanism of the sewing machine is large in integral structure size and is not suitable for processing specific products with smaller sizes, such as children shoes and the like.

(II) technical scheme

In order to solve the above technical problem, the present invention provides a transmission structure of a sewing machine, comprising: a rotating shuttle mechanism arranged below the needle plate; the rotating shuttle mechanism comprises a third rotating shuttle gear, a rotating shuttle shaft, a gear cover and a rotating shuttle seat, the rotating shuttle shaft penetrates into the third rotating shuttle gear and is fixedly connected with the third rotating shuttle gear, and the top of the rotating shuttle shaft is also in transmission connection with the rotating shuttle; the middle part of the gear cover is provided with an installation cavity, and one side wall of the gear cover is provided with an opening; the third rotating shuttle gear and the rotating shuttle shaft are arranged in the mounting cavity; the gear cover is provided with an outer side wall which is attached to the inner side wall of the rotating shuttle seat. The invention improves the structure of the gear cover, reduces the structure of the gear cover, and further can reduce the size of the rotating shuttle seat; the size of the machine head is reduced, and a specific product with smaller size can be processed; meanwhile, the rotating shuttle mechanism and the machine base are separated, processed separately and assembled together after being processed, so that the processing is simpler, and the processing precision is improved; the whole machine base does not need to be replaced when the machine base is maintained, only the first rotating shuttle mechanism needs to be disassembled independently, and the machine base is more convenient to replace and maintain.

Preferably, a rotating shuttle seat door is installed on one side of the rotating shuttle seat, a positioning hook is installed on the upper portion of the rotating shuttle seat door, and one end of the positioning hook is installed on the side wall of the rotating shuttle seat through a fastening piece.

Preferably, the transmission structure of the sewing machine further comprises a belt transmission mechanism, and the belt transmission mechanism comprises a lower shaft and a first main transmission shaft parallel to the lower shaft; one end of the lower shaft is provided with a first synchronous wheel; one end of the first transmission main shaft is provided with a first rotating shuttle gear, and the other end of the first transmission main shaft is provided with a second synchronizing wheel; the first rotating shuttle gear is used for being in transmission connection with a machine head power device, and drives a first transmission main shaft to rotate under the driving of the machine head power device, and the first synchronizing wheel is in transmission connection with a second synchronizing wheel adjacent to the first synchronizing wheel through a synchronous belt; a second rotating shuttle gear is arranged at one end of the lower shaft far away from the first synchronous wheel; the second rotating shuttle gear extends into the opening and engages the third rotating shuttle gear. The synchronous belt is in transmission connection with the first transmission main shaft and the lower shaft which is arranged on the same base in parallel, the belt stroke is short, the transmission occlusion resistance is small, the transmission process is sensitive, the whole width is reduced, the size of the whole structure is small, the length of the synchronous belt is short, the displacement and the loss caused by overlong belt can be effectively reduced, and the phenomenon of slipping caused by the fact that the elasticity of the synchronous belt (rubber) is poor and the synchronous belt is easy to loosen is caused because the longer synchronous belt is used for a long time; the whole feeding condition can be influenced, so that the short synchronous belt has good flexibility and longer service life.

Preferably, a bearing seat is arranged on the lower shaft, a synchronous belt tightening wheel is arranged on the bearing seat, the synchronous belt tightening wheel is arranged at the end part of the second synchronous wheel, and the other end of the synchronous belt tightening wheel is used for pressing a synchronous belt. The invention arranges the close proximity of the synchronous belt, so that after the synchronous belt is loosened after being used for a long time, the synchronous belt can be pressed by adjusting the synchronous belt tightening wheel, the synchronous belt is further tensioned, and the phenomena of slipping and the like can not occur.

Preferably, the transmission structure of the sewing machine further comprises a thread pressing mechanism; the wire pressing mechanism comprises a wire pressing sheet and a tooth frame which are arranged at the bottom of the needle plate, the wire pressing sheet is fixedly connected with the tooth frame, and a guide groove is formed in the tooth frame.

Preferably, the transmission structure of the sewing machine further comprises a crank transmission mechanism, the crank transmission mechanism comprises a first crank, a connecting rod and a second crank, and the first crank is in transmission connection with the second crank through the connecting rod; the tail end of the first crank is provided with a sliding column; the sliding column is inserted into the tooth rack and moves along the guide groove under the driving of the first crank.

Preferably, the transmission structure of the sewing machine further comprises a second main transmission shaft, and one end of the second main transmission shaft is in transmission connection with the machine head power device and is used for swinging up and down under the driving of the machine head power device.

Preferably, the other end of the second main transmission shaft is provided with a connecting seat, one end of the second main transmission shaft is inserted into the lower part of the connecting seat, and the upper part of the connecting seat is hinged with the tooth rack and used for driving the tooth rack to swing up and down.

Preferably, the transmission structure of the sewing machine further comprises a base, the belt transmission mechanism, the crank transmission mechanism and the second main transmission shaft are all installed in the base, and the needle seat of the belt transmission mechanism, the crank transmission mechanism and the second main transmission shaft is installed at the top of the base.

(III) advantageous effects

The invention provides a transmission structure of a sewing machine, which has the following advantages:

1. the invention improves the structure of the gear cover, reduces the structure of the gear cover, and further can reduce the size of the rotating shuttle seat; the size of the machine head is reduced, and a specific product with smaller size can be processed; meanwhile, the rotating shuttle mechanism and the machine base are separated, processed separately and assembled together after being processed, so that the processing is simpler, and the processing precision is improved; the whole machine base does not need to be replaced when the machine base is maintained, only the first rotating shuttle mechanism needs to be disassembled independently, and the machine base is more convenient to replace and maintain.

2. According to the invention, the synchronous belt is in transmission connection with the first transmission main shaft and the lower shaft, the belt stroke is short, the transmission occlusion resistance is small, the transmission process is sensitive, the whole width is reduced, the size of the whole structure is small, the length of the synchronous belt is short, the displacement and the loss caused by overlong belt can be effectively reduced, and the elasticity of the synchronous belt (rubber) is deteriorated and the phenomenon of slipping caused by easy looseness is caused because the longer synchronous belt is used for a long time; the whole feeding condition can be influenced, so that the short synchronous belt has good flexibility and longer service life.

3. The invention arranges the close proximity of the synchronous belt, so that after the synchronous belt is loosened after being used for a long time, the synchronous belt can be pressed by adjusting the synchronous belt tightening wheel, the synchronous belt is further tensioned, and the phenomena of slipping and the like can not occur.

Drawings

FIG. 1 is an exploded view of an embodiment 1 of a transmission structure of a sewing machine of the present invention;

fig. 2 is a partially enlarged assembly view of the rotating shuttle mechanism of embodiment 1 of the transmission structure of the sewing machine of the present invention, except for the rotating shuttle mechanism.

1. Gear cover, 2, second rotating shuttle gear, 3, third rotating shuttle gear, 4, bearing, 5, rotating shuttle shaft, 6, rotating shuttle seat, 7, positioning hook, 8, rotating shuttle seat door, 9, first crank, 10, connecting rod, 11, second crank, 12, connecting rod pin, 13, needle plate, 14, lower shaft, 15, bearing seat, 16, synchronous belt pinch roller, 17, first synchronous wheel, 18, second synchronous wheel, 19, synchronous belt, 20, machine base, 21, first rotating shuttle gear, 22, rotating shuttle, 23, installation cavity, 24, first main transmission shaft, 25, line pressing piece, 26, tooth rack, 27, guide groove, 28, connecting base, 29, second main transmission shaft, 30 and opening.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; may be mechanically coupled, directly coupled, or indirectly coupled through an intermediary. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.