CN217231098U

CN217231098U - Sewing machine

Info

Publication number: CN217231098U
Application number: CN202220396447.5U
Authority: CN
Inventors: 王群
Original assignee: Supreme Intelligent Technology Co Ltd
Current assignee: Supreme Intelligent Technology Co Ltd
Priority date: 2022-02-26
Filing date: 2022-02-26
Publication date: 2022-08-19
Anticipated expiration: 2032-02-26

Abstract

The utility model discloses a sewing machine, including sewing control module and sewing machine shell, be equipped with spindle motor in the sewing machine shell and by the rotatory lower shaft of spindle motor drive, be equipped with the faller on the sewing machine shell, be equipped with the feed dog in the below of faller, be equipped with the feed dog frame that is used for installing the feed dog in the sewing machine shell, the feed dog frame has the first linking arm that is used for driving feed dog frame up-and-down direction motion and is used for driving feed dog frame horizontal direction motion second linking arm. The end of the first connecting arm is connected with the lower shaft through a first transmission assembly. The end part of the second connecting arm is connected with a power output shaft of the cloth feeding driving motor through a second transmission assembly. The sewing control template is provided with a signal receiving module for receiving a backstitch key signal and a backstitch driving module for controlling the cloth feeding driving motor to rotate reversely so as to control the cloth feeding tooth frame to move reversely.

Description

Sewing machine

Technical Field

The utility model relates to an industrial sewing machine, specifically speaking are industrial sewing machine with backstitch function.

Background

In the industrial sewing machine in the prior art, only single feeding along the sewing feeding direction can be realized, and the feeding along the back sewing can not be realized when the reinforcement sewing or the back folding sewing needs to be finished, so that a set of back sewing mechanism needs to be added to meet the requirements. The utility model with the patent number of 201420867810.2 discloses a modularized backstitch mechanism for a flat seam sewing machine, which comprises a backstitch device, an adjusting device and a cloth feeding device; the backstitch device is connected with the adjusting device through a needle pitch adjusting crank, the adjusting device is connected with the cloth feeding device through a crank connecting rod, the cloth feeding device is connected with the cloth feeding shaft, and the backstitch device changes the relative position of the cloth feeding device by controlling the relative position of the adjusting device, so that the relative position of a cloth feeding tooth connected with the tail end of the cloth feeding shaft is controlled. Although the technical scheme of the patent adopts a modular design, the design, processing and assembly difficulty of the industrial sewing machine is still improved, and meanwhile, the operation personnel is not convenient enough when the backstitch is operated.

Disclosure of Invention

The utility model is directed at the above-mentioned prior art current situation, and provide an industrial sewing machine with backstitch function, need not to increase the backstitch mends the needle that mechanical structure can realize sewing machine.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a sewing machine comprises a sewing control module and a sewing machine shell, wherein a spindle motor and a lower shaft driven to rotate by the spindle motor are arranged in the sewing machine shell, a needle plate is arranged on the sewing machine shell, a cloth feeding tooth is arranged below the needle plate, a cloth feeding tooth rack used for installing the cloth feeding tooth is arranged in the sewing machine shell, and the cloth feeding tooth rack is provided with a first connecting arm used for driving the cloth feeding tooth rack to move in the vertical direction and a second connecting arm used for driving the cloth feeding tooth rack to move in the horizontal direction. The end of the first connecting arm is connected with the lower shaft through a first transmission assembly. The end part of the second connecting arm is connected with a power output shaft of the cloth feeding driving motor through a second transmission assembly. The sewing control template is provided with a signal receiving module for receiving a backstitch key signal and a backstitch driving module for controlling the cloth feeding driving motor to rotate reversely so as to control the cloth feeding tooth frame to move reversely.

In order to optimize the technical proposal, the utility model discloses still include following modified technical proposal.

The first transmission assembly comprises a lower shaft driving handle, the root of the lower shaft driving handle is fixedly connected with the lower shaft, an open slot is formed in the movable end of the lower shaft driving handle, and the end of the first connecting arm is arranged in the open slot in a sliding mode.

The second transmission component comprises a cloth feeding driving shaft which is rotatably arranged in the sewing machine shell, the cloth feeding driving shaft is fixedly connected with the root part of the cloth feeding driving handle, and the movable end part of the cloth feeding driving handle is rotatably connected with the end part of the second connecting arm.

The other end of the cloth feeding driving shaft is fixedly provided with a transmission handle, a power output shaft of the cloth feeding driving motor is fixedly provided with a motor driving handle, and the movable end of the transmission handle is rotatably connected with the movable end of the motor driving handle through a connecting rod.

And bearing sleeves are respectively arranged at two ends of the connecting rod, and connecting bearings are arranged in the bearing sleeves.

The cloth feeding driving motor is provided with a sensor module for detecting the rotation angle of the power output shaft.

The sewing control module is provided with a signal processing module which receives the signal sent by the signal receiving module and calculates the reverse rotation angle of the cloth feeding driving motor.

Compared with the prior art, the utility model discloses a sewing machine accessible backstitch button realizes backstitch mends the needle function, convenient operation. When the sewing machine is used for forward sewing, the forward rotation of the cloth feeding driving motor is controlled to control forward cloth feeding sewing, and when backstitch is needed, only the backstitch button needs to be pressed, and the reverse rotation of the cloth feeding driving motor is controlled to realize reverse cloth feeding sewing. The backstitch is flexibly controlled by the rotation angle of the cloth feeding driving motor, no additional mechanical structure is needed, and the backstitch sewing machine has the advantages of low cost and convenience in operation.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention.

Fig. 2 is a front view of fig. 1.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

Fig. 1 to fig. 2 are schematic structural diagrams of the present invention.

Wherein the reference numerals are: the cloth feeding mechanism comprises a lower shaft 1, a needle plate 2, a cloth feeding dog 21, a cloth feeding dog frame 3, a first connecting arm 31, a second connecting arm 32, a lower shaft driving handle 4, an open groove 41, a cloth feeding driving shaft 5, a transmission handle 51, a cloth feeding driving handle 6, a cloth feeding driving motor 7, a motor driving handle 71 and a connecting rod 72.

The utility model discloses a sewing machine, including sewing control module and sewing machine shell.

A main shaft motor and a lower shaft 1 driven by the main shaft motor to rotate are arranged in a sewing machine shell. A needle plate 2 is provided on a sewing machine housing. A needle is arranged above the needle plate 2, and a main shaft motor drives the needle to move up and down through a main shaft and a needle rod driving structure.

A feed dog 21 is arranged below the needle plate 2, and a feed dog frame 3 for mounting the feed dog 21 is arranged in the sewing machine shell. The feed dog holder 3 can drive the feed dog 21 to move like an elliptical orbit, thereby causing the feed dog 21 to move the cloth on the needle plate 2.

The movement of the feed dog frame 3 similar to the elliptical trajectory can be split into the movement in the up-down direction and the movement in the horizontal direction. The feed dog 3 has a first connecting arm 31 for driving the feed dog 3 to move up and down and a second connecting arm 32 for driving the feed dog 3 to move horizontally. The end of the first connecting arm 31 is connected to the lower shaft 1 via a first transmission assembly. The end of the second connecting arm 32 is connected with the power output shaft of the cloth feeding driving motor 7 through a second transmission assembly.

The first transmission component comprises a lower shaft driving handle 4, the root of the lower shaft driving handle 4 is fixedly connected with the lower shaft 1, an open slot 41 is formed in the movable end part of the lower shaft driving handle 4, and the end part of the first connecting arm 31 is arranged in the open slot 41 in a sliding manner. The lower shaft driving handle 4 is horizontally arranged, and when the lower shaft 1 drives the lower shaft driving handle 4 to swing, the movable end of the lower shaft driving handle 4 approximately makes an arc motion along the up-down direction, so that the up-down driving force is applied to the cloth feeding tooth rack 3 through the first connecting arm 31.

The cloth feeding driving motor 7 is a stepping motor, has a sensor module for detecting the rotation angle of the power output shaft, and can control the rotation angle of the power output shaft.

The second transmission component comprises a cloth feeding driving shaft 5 which is rotatably arranged in the sewing machine shell, the cloth feeding driving shaft 5 is fixedly connected with the root part of a cloth feeding driving handle 6, and the movable end part of the cloth feeding driving handle 6 is rotatably connected with the end part of the second connecting arm 32.

The other end of the cloth feeding driving shaft 5 is fixedly provided with a transmission handle 51, a power output shaft of the cloth feeding driving motor 7 is fixedly provided with a motor driving handle 71, and the movable end of the transmission handle 51 is rotatably connected with the movable end of the motor driving handle 71 through a connecting rod 72.

Two ends of the connecting rod 72 are respectively provided with a bearing sleeve, and a connecting bearing is arranged in the bearing sleeves. After the power output shaft of the cloth feeding driving motor 7 rotates, the cloth feeding driving shaft 5 is driven to rotate by the motor driving handle 71, the connecting rod 72 and the transmission handle 51. The cloth feeding driving handle 6 is vertically arranged, and when the cloth feeding driving shaft 5 drives the cloth feeding driving handle 6 to swing, the movable end of the cloth feeding driving handle 6 makes an arc motion approximately along the horizontal direction, so that a driving force in the horizontal direction is applied to the cloth feeding dental frame 3 through the second connecting arm 32.

The sewing control template is provided with a signal receiving module for receiving a signal of the backstitch key and a backstitch driving module for controlling the cloth feeding driving motor 7 to rotate reversely to control the reverse cloth feeding motion of the cloth feeding tooth frame 3.

The sewing control module is provided with a signal processing module which receives the signal sent by the signal receiving module and calculates the reverse rotation angle of the cloth feeding driving motor 7.

In a normal sewing state, the spindle motor drives the needle and the feed dog 21 to synchronously work, and sewing is performed in sequential directions. When the backstitch key is pressed for a long time, the signal receiving module sends a pressing state signal, the signal processing module calculates the reverse rotation angle of the cloth feeding driving motor 7 according to the pressing state duration, and when the backstitch key is released, the backstitch driving module executes the calculated angle of the reverse rotation of the cloth feeding driving motor 7. At the moment, the spindle motor drives the needle and the feed dog 21 to work synchronously, and the feed dog 21 feeds cloth in the reverse sewing direction, so that the sewing filling function is realized.

The backstitch button may last one or two seconds in the depressed state. The signal processing module can automatically calculate the reverse rotation angle of the cloth feeding driving motor 7 according to the setting, and the automatic calculation and realization of the stitch length during the stitch filling and the stitch fixing are realized. For example, when the backstitch button can be pressed for one second, the signal processing module calculates the reverse rotation angle of the cloth feeding driving motor 7 to be consistent with the feeding angle during forward sewing according to the duration of the pressed state, so that the needle pitch of one backstitch is the same as that during forward sewing. When the backstitch button can last for two seconds in the pressed state, the signal processing module calculates the reverse rotation angle of the cloth feeding driving motor 7 according to the pressed state duration and is larger than the feeding angle in the forward sewing process, and the needle pitch of backstitch one needle is twice of the needle pitch in the forward sewing process. Similarly, the signal processing module can also calculate the feeding angle when the reverse rotation angle of the cloth feeding driving motor 7 is smaller than the forward sewing angle, and the stitch length of the backward sewing stitch is half of the stitch length of the forward sewing stitch.

While the preferred embodiments of the present invention have been illustrated, various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention.

Claims

1. The utility model provides a sewing machine, includes sewing control module and sewing machine shell, sewing machine shell in be equipped with spindle motor and by the rotatory lower shaft (1) of spindle motor drive, be equipped with faller (2) on sewing machine shell, be equipped with feed dog (21) in the below of faller (2), be equipped with feed dog frame (3) that are used for installing feed dog (21) in the sewing machine shell, characterized by: the cloth feeding tooth rack (3) is provided with a first connecting arm (31) for driving the cloth feeding tooth rack (3) to move up and down and a second connecting arm (32) for driving the cloth feeding tooth rack (3) to move horizontally; the end part of the first connecting arm (31) is connected with the lower shaft (1) through a first transmission assembly; the end part of the second connecting arm (32) is connected with a power output shaft of the cloth feeding driving motor (7) through a second transmission assembly; the sewing machine shell on be equipped with the backstitch button, sewing control template have and receive the signal reception module of backstitch button signal and be used for controlling feed driving motor (7) antiport is with the backstitch drive module of control feed dental frame (3) reverse feed motion.

2. The sewing machine of claim 1, wherein: first drive assembly include lower shaft drive handle (4), the root and lower shaft (1) fixed connection of lower shaft drive handle (4), the activity tip system of lower shaft drive handle (4) has open slot (41), the tip of first connecting arm (31) slide and set up open slot (41) in.

3. The sewing machine of claim 1, wherein: the second transmission assembly comprises a cloth feeding driving shaft (5) rotatably mounted in the sewing machine shell, the cloth feeding driving shaft (5) is fixedly connected with the root part of a cloth feeding driving handle (6), and the movable end part of the cloth feeding driving handle (6) is rotatably connected with the end part of a second connecting arm (32).

4. A sewing machine as claimed in claim 3, wherein: the cloth feeding device is characterized in that a transmission handle (51) is fixedly mounted at the other end of the cloth feeding driving shaft (5), a motor driving handle (71) is fixedly mounted on a power output shaft of the cloth feeding driving motor (7), and the movable end of the transmission handle (51) is rotatably connected with the movable end of the motor driving handle (71) through a connecting rod (72).

5. The sewing machine of claim 4, wherein: and bearing sleeves are respectively arranged at two ends of the connecting rod (72), and connecting bearings are arranged in the bearing sleeves.

6. The sewing machine of claim 1, wherein: the cloth feeding driving motor (7) is provided with a sensor module for detecting the rotation angle of the power output shaft.

7. The sewing machine of claim 1, wherein: the sewing control module is provided with a signal processing module which receives the signal sent by the signal receiving module and calculates the reverse rotation angle of the cloth feeding driving motor (7).