WO2022057446A1

WO2022057446A1 - Sewing machine having high-efficiency transmission

Info

Publication number: WO2022057446A1
Application number: PCT/CN2021/108574
Authority: WO
Inventors: 林子春; 潘林勇; 陈通平
Original assignee: 琦星智能科技股份有限公司
Priority date: 2020-09-20
Filing date: 2021-07-27
Publication date: 2022-03-24

Abstract

A sewing machine having high-efficiency transmission, comprising a cantilever portion (11), a substrate (20), and a sewing electronic control. A power source 1 for performing upper thread sewing is provided at the interior of the cantilever portion (11). A power source 2 for performing a lower thread sewing task is provided at a lower portion of the substrate (20). The cantilever portion (11) and the substrate (20) are provided so as to be independently driven by means of the power source 1 and the power source 2, respectively. The power source 2 comprises a sewing motor for driving a rotary spindle to perform sewing. The rotary spindle comprises a thread stand (6), a hook (5), and a rotary spindle holder (3). A floating bobbin (7) is disposed in an inner cavity of the rotary spindle holder (3). A thread stand (6) is disposed in an inner cavity of the floating bobbin (7). The thread stand (6) and the floating bobbin (7) are rotatably connected such that rotary connection between the thread stand (6) and the rotary spindle holder (3) is achieved by means of the floating bobbin (7). The hook (5) is disposed on the outside of the rotary spindle holder (3), and there is a gap between the hook (5) and the rotary spindle holder (3). The sewing motor (91) drives the hook (5) to move around the outer circumference of the rotary spindle holder (3).

Description

A high-efficiency transmission sewing machine

technical field

The present application relates to the technical field of sewing machines, and in particular, to a sewing machine with high-efficiency transmission.

Background technique

As a sewing machine for fabrics, sewing machines have a history of more than 200 years of development. They have contributed to the development of the clothing industry in human society and promoted the development of human civilization. In the mechanical transmission system of the sewing machine, the main shaft motor provides power for the operation of the entire sewing machine. The more common power distribution scheme is to set the main drive shaft inside the head of the sewing machine, and set the synchronizing wheel or bevel gear set in the middle part of the main drive shaft. The power is transmitted to the base plate of the sewing machine, in order to realize the task of outputting the sewing thread; at the end of the main drive shaft, it provides power for the up and down operation of the needle sliding rod. For example, in the Chinese patent literature, the patent number CN2019103855413 disclosed on June 28, 2019 is called a template sewing machine, which includes a casing, a base, a machine head assembly, and a rotary hook assembly. The casing includes a column portion and a In the cantilever part, the machine head assembly is fixedly connected with the upper rotating shaft, the upper rotating shaft is rotatably connected in the upper casing, the rotary hook assembly is fixedly connected with the lower rotating shaft, and the upper rotating shaft and the lower rotating shaft are connected with the upper synchronous belt and the lower synchronous belt respectively. The vertical shaft is connected, and the vertical shaft is directly or indirectly driven by the motor to drive the rotary hook assembly and the machine head assembly to rotate synchronously, and one side or both sides of the upper synchronous belt are respectively provided with tensioners for tensioning the upper synchronous belt The upper box body is slidably connected to the fixing plate, the fixing plate is fixed on the left end of the cantilever part, the lifting cylinder is arranged on the fixing plate, the piston rod of the lifting cylinder is connected with the upper box body, when the lifting cylinder drives the motor When the head assembly moves upward, the tensioning mechanism releases the tension on the upper synchronous belt, and one end of the upper synchronous belt moves upward together with the head assembly. When the lifting cylinder drives the head assembly to move down and reset, the tensioning The mechanism tensions the upper synchronous belt.

The mechanical transmission of the existing sewing machine has the defects of low transmission efficiency, high difficulty in manufacturing the sewing machine, high mechanical wear and high noise. In addition, when sewing, each transmission part needs to be greased, especially the rotary hook running at high speed, because the speed ratio between the rotary hook and the main shaft is 2:1, and the rotary hook is usually running at 8000 rpm. Adding an appropriate amount of lubricating oil to the hook will inevitably pollute the sewing thread and fabric.

SUMMARY OF THE INVENTION

In view of the above-mentioned defects of low transmission efficiency in the mechanical transmission of existing sewing machines and the need to add lubricating oil for high-speed operation of the rotary hook, the present application breaks the design concept of conventional sewing machines, and proposes and produces a sewing machine with high-efficiency transmission. The base plate is set independently and implements its own power source, and the rotary hook of the present application does not need lubricating oil, no contact, no wear, long life, no need to match a complex speed change gear set, and has the advantages of convenient application, low cost and high degree of intelligence. benefit.

In order to achieve the above purpose of the invention, the present invention adopts the following technical solutions.

A high-efficiency transmission sewing machine, comprising a cantilever part, a base plate and a sewing electric control, characterized in that the cantilever part is provided with a power source 1 for performing upper thread sewing, and the lower part of the base plate is provided with a lower thread sewing task. Power source two, the cantilever part and the base plate are independently driven by power source one and power source two, the power source two includes a sewing motor for driving the rotary hook to perform sewing; the rotary hook includes a thread rack, a hook Needle and hook fixing seat, the inner cavity of the hook fixing seat is provided with a suspension bobbin, the thread rack is arranged in the inner cavity of the suspension bobbin, and the thread rack and the suspension bobbin are rotated and connected to the thread rack through the suspension bobbin. It is connected with the rotation of the hook fixing seat, the hook needle is arranged outside the hook fixing seat, there is a gap between the hook needle and the hook fixing seat, and the sewing motor drives the hook needle to move around the outer circumference of the hook fixing seat. In the present application, the sewing machine is set as two independent cantilever parts and base plates, and the respective power sources are implemented, and several motors of the respective power sources are programmed under the sewing electric control, thereby improving the intelligent level of sewing control. , In particular, the sewing motor installed at the bottom of the base plate mentioned above is used to directly drive the hook to perform sewing; the suspended bobbin and its thread frame are arranged in the inner cavity of the fixed hook fixing seat, and the sewing motor drives the hook to hook and then hook it again. The process of putting the needle on the needle and driving the thread frame to exit the thread is non-contact and frictionless, so that the thread hook suspension hook of the present application does not need to run at a high speed as in the prior art to realize the sewing work, and the thread hook suspension of the present application is realized. The static work of the rotary hook also enables the sewing equipment using the thread hook suspension rotary hook of the present application to have better mechanical transmission performance.

Preferably, the cantilever portion is fixed above the sewing machine, and the base plate is fixed below the sewing machine. The cantilever part and the base plate constitute a sewing machine, and a column can be set for threading, or no column part is set. When the column part is not set, the cantilever part and the base plate constitute a sewing machine, so that large pieces of fabric or fabrics that are not easy to fold can be used on this sewing machine. The sewing can be realized smoothly and has high practicability.

Preferably, the sewing machine further comprises a column part, the lower part of the column part is connected to the base plate, and the upper part of the column part is connected to the cantilever part. Static components such as power harnesses can be erected on the support connection base plate of the column part and the cantilever part; it is convenient for equipment integration.

Preferably, a power harness is erected on the column. Improve device integration.

Preferably, the first power source inside the cantilever and the second power source at the lower part of the base plate are controlled by the sewing electric control program. The first power source in the cantilever and the second power source in the lower part of the base plate are controlled by the sewing electric control program. Through the programmatic control of the motor that controls the rotary hook, the sewing quality and the overall efficiency of the sewing machine are improved.

Preferably, the suspension bobbin is provided with a line dividing boss, a sliding line inclined surface and a sliding line plane, the inner circular arc surface of the rotary hook fixing seat is opposite to the sliding line inclined surface and has a sliding line gap, and the sliding line plane and the anti-skid out baffle Relatively have sliding line clearance.

Preferably, the hook fixing base is provided with a positioning connecting rod, the rotating hook fixing base is fixed with the positioning connecting rod, and the sewing motor is fixed on the positioning connecting rod.

Preferably, the rotary hook further comprises a needle, the needle is parallel to the end face of the thread stand, the needle is provided with a thread hooking place for hooking the thread, and the hooking needle is directly opposite to the thread hooking place.

1. Preferably, the rotary hook also includes a needle plate and a needle, the needle is perpendicular to the end face of the thread stand, and the needle is provided with a hooking place for hooking the thread, and the hook is opposite to the hooking place, and the needle is The front end is in the needle plate hole on the needle plate, the needle plate is above the hook needle and the suspension bobbin, and the hook needle works with the suspension bobbin and the hook fixing seat without contact. The sewing motor on the outer circumference of the thread-separating boss provided by the suspension bobbin operates.

Compared with the prior art, the present invention has the advantages that the existing sewing machine structure and the transmission system are effectively separated, and the motor is installed inside the cantilever and the motor is installed under the base plate to perform the respective upper and lower thread sewing tasks, Intelligent control is adopted for the respective motors, which greatly increases the application performance of the sewing machine, and has high mechanical transmission efficiency, which is conducive to the development of intelligent automation and lightweight sewing equipment; The sewing work does not need to be run at a high speed as in the prior art, and the static work of the thread hook suspension hook of the present application is realized, and the sewing equipment using the thread hook suspension hook of the present application has better mechanical transmission efficiency.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the structural representation of the rotary shuttle in an embodiment of the present application;

Fig. 3 is the side view of the rotary hook in the present application;

4 is an exploded view of the rotary hook fixing seat, the suspension bobbin and the thread stand of the rotary hook in the present application;

Fig. 5 is a partial enlarged view of Fig. 3;

6 is a schematic diagram of the initial hooking state of the hook in the present application;

Fig. 7 is the schematic diagram of the off-line state of the floating hook in the present application;

Fig. 8 is the schematic diagram of the first stitching point of the rotary hook in the present application;

FIG. 9 is a schematic diagram of a hook fixing seat in another embodiment of the present application.

In the figure: machine head 1, needle 2, thread hook 21, hook fixing seat 3, anti-skid baffle 31, positioning groove 32, inner arc surface 33, hook 5, thread holder 6, suspension bobbin 7 , positioning bump 71, thread dividing boss 72, sliding line slope 73, sliding line plane 74, front bump 75, lower thread lead-out groove 76, needle plate 8, needle plate hole 81, sewing motor 91, hollow spindle 911, Positioning connecting rod 92 , bearing 93 , upper wire 1 a , lower wire 1 d , off-line position 1 c , cantilever part 11 , column part 12 , base plate 20 .

detailed description

The present utility model will be further elaborated below in conjunction with the accompanying drawings and specific embodiments, so that the advantages and characteristics of the present application can be more easily understood by those skilled in the art, so that the protection scope of the present application can be more clearly defined. The embodiments are only used to illustrate the present invention, but not to limit the present invention.

Example 1,

As shown in Figures 1 to 8, a high-efficiency transmission sewing machine has a cantilever part 11, a base plate 20 and a sewing electric control (not shown in the figure). The cantilever part 11 is provided with a power source for performing thread sewing. The lower part is provided with a power source 2 for performing the task of lower thread sewing. The arm portion and the base plate are independently driven by no mechanical transmission components between the power source 1 and the power source 2, that is, there is no mechanical transmission between the cantilever portion 11 and the base plate 20. Mechanical transmission components, such as transmission shafts, timing belts, up and down moving parts or swinging parts, are not provided with mechanical transmission components. The power source one inside the cantilever part 11 and the power source two in the lower part of the base plate 20 are controlled by sewing electric control. On this basis, the sewing electric control is used to control the power source one and the power source two. The second power source can be one motor or several motors. The power source 1 inside the cantilever portion 11 and the power source 2 on the lower part of the base plate 20 are controlled by the sewing electric control program, so that the sewing machine of the present application is further intelligentized. improve.

Further, the second power source installed at the lower part of the base plate 20 includes a sewing motor for directly driving the rotary hook to perform sewing.

The above-mentioned upright portion 12 is provided between the cantilever portion 11 and the base plate 20 , and the upright portion 12 plays a role of fixedly connecting the cantilever portion 11 and the base plate 20 . 12 is optional in this application. When the upright portion 12 is provided, the upright portion 12 is connected to the base plate 20 and connected to the cantilever portion 11, and static components such as power supply harnesses can be erected on the upright portion 12; when the upright portion 12 is not provided, the cantilever portion 11 is fixed above the sewing machine, The base plate 20 is fixed under the sewing machine to form the sewing machine, so that the sewing of large pieces of fabric or fabrics that are not easy to fold can be smoothly achieved on the sewing machine, which has high practicability. When the column portion 12 is not provided, the cantilever portion 11 and the base plate 20 constitute the handpiece 1 , and when the column portion is provided, the cantilever portion 11 , the column portion 12 and the base plate 20 constitute the handpiece 1 .

The rotary hook, as shown in FIGS. 2 to 5 , has a sewing motor 91 , a rotary hook fixing base 3 , a suspended bobbin 7 , a needle 2 , a positioning connecting rod 92 , a thread stand 6 and a hook 5 . The hook fixing base 3 of the present application is a fixed type, that is, the hook fixing base 3 is connected to the positioning connecting rod 92 , and the rotating hook fixing base 3 and its positioning connecting rod 92 are stationary during the sewing process, and the positioning connecting rod 92 is stationary. Indirectly or directly fixed on the base plate 20 of the sewing machine head 1, the needle 2 has a thread hooking portion 21 for hooking the hook 5 to hook the thread.

The sewing motor 91 of the present application has a hollow main shaft 911 , the hollow main shaft 911 is a power output shaft, the positioning connecting rod 92 passes through the hollow main shaft 911 , and a bearing 93 is provided between the hollow main shaft 911 and the positioning connecting rod 92 . The sewing motor 91 is dynamically connected with the positioning connecting rod 92, the sewing motor 91 is fixed on the lower side of the base plate 20, and the hollow spindle 911 of the sewing motor 91 is connected to drive the hook 5 to run. The above-mentioned positioning connecting rod 92 is arranged coaxially with the wire rack 6 .

The hook 5 is directly connected to the sewing motor 91 , or, in another embodiment, a connecting body is provided between the hook 5 and the sewing motor 91 , so that the sewing motor 91 drives the hook 5 to operate.

The sewing motor 91 arranged at the bottom of the hook fixing base 3 takes the positioning connecting rod 92 as the central axis to drive the hook 5 to rotate in a circle. The installation position and angle of the hook fixing base 3 can be adjusted according to the requirements of different sewing equipment.

The hook fixing base 3 has an anti-slip baffle 31, and the hook fixing base 3 has an anti-slip front baffle 31. When the above-mentioned anti-slip front baffle 31 is installed on the hook fixing base 3, it may be optional according to the usage of the wire rack 6. No, this embodiment is described by taking the front baffle plate 31 for preventing slipping out as an example. Specifically, the baffle plate 31 for preventing slipping out is installed on the side part or the end part of the hook fixing base 3 . The above-mentioned anti-slip baffle 31 is arranged and fixed on the hook fixing seat 3 in the form of a cover plate, and the anti-slip baffle 31 abuts on the suspension bobbin 7 and/or the thread frame 6 during the sewing process, so as to prevent the above-mentioned suspension. Lateral positioning of both the bobbin 7 and the thread stand. Here, the connection between the hook fixing base 3 and the anti-slip baffle 31 of the present application is a spring hinge type, and can also be set as a positioning connection, and the anti-slip baffle 31 can be opened or closed by pushing to the side by hand. In addition, the above-mentioned anti-slip baffle 31 is provided outside the range where the sewing motor 91 drives the hook 5 to operate.

The above-mentioned hook fixing seat 3 has an inner cavity that can accommodate the suspension bobbin 7, and the suspension bobbin 7 has an inner cavity that can accommodate the thread rack 6. Specifically, the thread rack 6 is placed in the inner cavity of the suspension bobbin 7, and the suspension bobbin 7 and the thread rack 6 are placed in the inner cavity of the hook fixing seat 3, and the suspension bobbin 7 is actually placed together with the thread rack 6. When taken out, the suspension bobbin 7 and the thread rack 6 are removed from the inner cavity of the hook fixing seat 3. take out. There is a positioning setting and a sliding line gap between the suspension bobbin 7 and the hook fixing seat 3, and the hook fixing seat 3 also has a lower thread lead-out hole.

The above-mentioned positioning setting is specifically: as shown in FIG. 4 , the above-mentioned suspension bobbin 7 also has a positioning bump 71, and the positioning bump 71 is arranged on the side close to the hook fixing seat 3; the hook fixing seat 3 also has a positioning groove 32, The positioning groove 32 is matched with the positioning projection 71 . When the suspension bobbin 7 is placed in the inner cavity of the hook fixing seat 3 , the positioning projections 71 of the suspension bobbin 7 are positioned in the positioning grooves 32 of the hook fixing seat 3 , and the positioning projections 71 play a role in aligning the suspension bobbin 7 . The function of being positioned on the hook fixing seat 3 ensures the placement position of the suspension bobbin 7 and also ensures the free sliding line gap between the suspension bobbin 7 and the hook fixing seat 3 .

The above-mentioned sliding line clearance refers to: the suspension bobbin 7 has a line dividing boss 72, a front bump 75, a sliding line inclined surface 73 and a sliding line plane 74, and the sliding line inclined surface 73 and the sliding line plane 74 are located at the two sides of the line dividing boss 72. On the other hand, the sliding line inclined surface 73 of the above-mentioned suspension bobbin 7 faces the inner circular arc surface 33 that the rotary hook fixing seat 3 has. The plate 31 relatively has a sliding line gap, and the line dividing boss 72 is used to divide the sliding line, so that the sewing thread is driven by the hook 5 to slide over the sliding line inclined surface 73, and the second slides from the sliding line plane 74, and the hook is hooked. The needle 5 operates with the power input source outside the circumference of the thread dividing boss 72 of the suspension bobbin 7 . The front bump 75 is arranged at the front end of the thread dividing boss 72 , the front bump 75 has a needle positioning hole groove 711 , and the front bump 75 is provided with a lower thread lead-out slot 76 . Since the above-mentioned suspension bobbin 7 and the hook fixing base 3 have a sliding thread gap, it is convenient for the sewing thread to bypass the sliding thread from the thread dividing boss 72 .

The above-mentioned hook 5 runs with the power input source on the outside of the circumference of the thread dividing boss 72 that the suspended bobbin 7 has, and is on the tangent surface of the hooking place 21, the needle 2 is parallel to the thread stand 6, and the hook 5 is in the hooking thread. On the tangent plane at position 21, the present embodiment is described with the needle 2 parallel to the thread stand 6 (parallel to the side of the thread stand 6).

The above-mentioned hook 5 and the suspension bobbin 7 and the suspension bobbin 7 work together in a non-contact hook and thread splitting operation. First put the thread stand 6 into the inner cavity of the suspension bobbin 7, and then put the suspension bobbin 7 together with the thread stand 6 into the hook fixing seat 3, the positioning protrusion 71 should be pressed on the positioning groove 32, and the cover should not slip out. The baffle 31, the anti-slip baffle 31 abuts the front of the suspension bobbin 7 and/or the thread rack 6, and at the same time makes the anti-slip baffle 31 abut the sliding line plane 74 of the suspension bobbin; The sliding line inclined surface 73 is opposite to the hook fixing seat 3, so that the sewing thread slides over the sliding line plane 74 and the sliding line inclined surface 73 on both sides of the line dividing boss 72, forming a free sliding line gap, and realizing the sewing thread. The technical effect of non-contact thread-hook and thread-splitting on a thread-hook suspension hook of the present application. Compared with the rotary hook of the prior art, the rotary hook fixing base 3 of the present application is different in the operation mode. The rotary hook fixing base 3 of the present application is static during sewing, and the sewing is carried out under the condition of no contact and no wear. hooked.

At the end of sewing, the anti-slip baffle 31 is still in a closed state, that is, the anti-slip baffle 31 is still opposite to the sliding line plane 74 of the suspension bobbin 7 . To take out the thread holder 6 that has used up the sewing thread, push the anti-slip baffle 31 away, and the thread holder 6 can be taken out from the suspension bobbin 7; Place it in the inner cavity of the suspension bobbin 7 and lead the lower thread, cover the anti-skid baffle 31 to start sewing; to take out the suspension bobbin 7, push the anti-slip baffle 31 away, and the suspension bobbin 7 Take it out from the inner cavity of the hook fixing seat 3 together with the thread holder 6 .

With reference to the drawings, the hook 5 of the present application is arranged on the outside of the hook fixing base 3 , the needle positioning hole groove 711 of the front bump 75 is for the front end of the needle 2 to run, and the hook 5 is driven by the sewing motor 91 to hook The upper thread that resides on the hook thread 21 of the outer needle 2. The hook 5 is connected to the sewing motor 91, and the hook 5 is driven by the sewing motor 91 to generate a corresponding thread hook movement trajectory, and operates in coordination with the machine needle 2 to achieve the sewing purpose of hook thread. The upper thread 1a of the needle 2 sews and hooks the thread, and the pulling force of the hook 5 to the upper thread 1a drives the thread holder 6 of the suspended bobbin 7 to output the thread source. Under the operation of the sewing motor 91, the hook 5 and the needle 2 are coordinated with each other, so that during the sewing process, the thread frame 6 needs a lower rotation speed to realize the sewing thread, while the hook fixing seat 3 and the suspension bobbin 7 are in a static state. It overcomes the requirement of high-speed operation of the rotary hook in the existing sewing machine technology.

As shown in Fig. 6 to Fig. 8, when the hook is in use, the lower thread 1d is first led to the lower thread lead-out groove 76, and when the needle 2 takes the upper thread 1a through the cloth, it reaches the needle positioning hole of the suspension bobbin 7 After the groove 711, the power input source drives the hook 5 at the hooking position 21 and hooks the upper thread 1a. The hooked upper thread 1a is divided into the front thread and the rear thread by the thread dividing boss 72 of the suspension bobbin 7. The hook 5 Continue to rotate more than 180 degrees to the off-line position 1c to start off-line. At the same time, the needle 2 pulls the upper thread 1a to continue to take up the thread, tightens the upper thread 1a surrounding the suspended bobbin 7 and wraps the lower thread 1d to complete the sewing.

Example 2,

In FIG. 9, the second embodiment is basically the same as the above-mentioned first embodiment, the difference is that the needle 2 of the first embodiment is perpendicular to the thread stand 6, and also has a needle plate 8, and the front end of the above-mentioned needle 2 is at The needle plate hole 81 on the needle plate 8 operates, the needle 2 is perpendicular to the needle plate 8, the needle plate 8 is above the hook 5 and the suspended bobbin 7, and the hook 5 is on the tangent surface of the hook 21. The needle 2 takes the upper thread 1a through the needle plate 8 and enters the initial hooking state. The needle tip of the above-mentioned needle 2 runs in the needle plate 8, and the needle 2 works under the needle plate 8 outside the suspended bobbin 7. The hook needle 5 and the suspension bobbin 7 and the suspension bobbin 7 work together without contact for hooking and dividing the thread. The direction of the needle 5 is different from that of the first embodiment, and the thread hooking process is the same. The above solution has the same technical effect as the first embodiment, and should also belong to the protection scope of the present application.

The above descriptions are only the preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present application, or directly or indirectly applied to other related The technical field is similarly included in the scope of patent protection of this application.

Claims

A high-efficiency transmission sewing machine, comprising a cantilever part, a base plate and a sewing electric control, characterized in that the cantilever part is provided with a power source 1 for performing upper thread sewing, and the lower part of the base plate is provided with a lower thread sewing task. Power source two, the cantilever part and the base plate are independently driven by power source one and power source two, the power source two includes a sewing motor for driving the rotary hook to perform sewing; the rotary hook includes a thread rack, a hook Needle and hook fixing seat, the inner cavity of the hook fixing seat is provided with a suspension bobbin, the thread rack is arranged in the inner cavity of the suspension bobbin, and the thread rack and the suspension bobbin are rotated and connected to the thread rack through the suspension bobbin. It is connected with the rotation of the hook fixing seat, the hook needle is arranged outside the hook fixing seat, there is a gap between the hook needle and the hook fixing seat, and the sewing motor drives the hook needle to move around the outer circumference of the hook fixing seat.
The high-efficiency transmission sewing machine according to claim 1, wherein the cantilever portion is fixed above the sewing machine, and the base plate is fixed below the sewing machine.
A high-efficiency transmission sewing machine according to claim 1 or 2, characterized in that, the sewing machine further comprises a column part, the lower part of the column part is connected to the base plate, and the upper part of the column part is connected to the cantilever part.
A high-efficiency transmission sewing machine according to claim 3, characterized in that, a power harness is erected on the column portion.
The high-efficiency transmission sewing machine according to claim 1, wherein the first power source inside the cantilever portion and the power source II at the lower part of the base plate are programmed and controlled by sewing electric control.
The high-efficiency transmission sewing machine according to claim 1, wherein the suspension bobbin is provided with a thread dividing boss, a sliding thread inclined surface and a sliding thread plane; The sliding line inclined plane has a sliding line gap relatively, and the sliding line plane and the anti-skid baffle have a sliding line gap relatively.
The high-efficiency transmission sewing machine according to claim 1, wherein a positioning connecting rod is provided on the hook fixing base, the rotating hook fixing base is fixed with the positioning connecting rod, and the sewing motor is fixed on the positioning connecting rod.
A high-efficiency transmission sewing machine according to claim 1, 6 or 7, wherein the rotary hook further comprises a needle, the needle is parallel to the end face of the thread stand, and the needle is provided with a hook for hooking the needle. At the hook of the thread, the hook is directly opposite the hook.
A high-efficiency transmission sewing machine according to claim 1, 6 or 7, wherein the rotary hook further comprises a needle plate and a needle, the needle is perpendicular to the end face of the thread stand, and the needle is provided with a hook for hooking At the hook of the hook, the hook is directly opposite to the hook, the front end of the needle is in the needle plate hole on the needle plate, the needle plate is above the hook and the suspension bobbin, the hook and the suspension shuttle The core and the hook fixing seat work together without contact, and the hook needle is operated by a sewing motor outside the circumference of the thread dividing boss provided by the suspension bobbin.