What is the names of the different parts of a sewing machine?

When sewing, the sewing machine plays the role of conveying, recovering the needle thread, and tightening the stitch in the process of forming the stitch. It is classified as:

Cam thread take-up mechanism.

A mechanism that drives the thread take-up lever to move by the cam.

Connecting rod thread take-up mechanism:

A mechanism that drives the movement of the thread take-up lever by a four-bar linkage mechanism. The thread take-up lever is the connecting rod of the four-bar linkage.

Sliding bar thread take-up mechanism:

A mechanism that drives the movement of the thread take-up rod by the crank-slider mechanism. The thread take-up lever is the guide rod of the four-bar linkage.

Rotary thread take-up mechanism:

It is a mechanism that uses one or two circular discs or other shaped components equipped with thread take-up pins to perform thread take-up movement by rotating motion.

Needle bar thread take-up mechanism:

It is a mechanism that is fixed to the thread-passing or thread-clamping device on the needle bar or the thread take-up lever that is directly fixed to the needle bar.

The sewing machine is a mechanism for delivering the sewing material when sewing. It is classified as:

Forward feeding mechanism: feeding away from the direction of the operator.

Reverse feeding mechanism: feeding in the direction of the operator.

Horizontal feeding mechanism: feeding along the left and right directions of the operator.

Lower feeding mechanism: The presser foot of the pressing rod mechanism presses the sewing material, and the lower feeding tooth of the feeding mechanism pushes the sewing material on the back of the sewing material. It is the most basic feeding form in the sewing machine.

Upper feeding mechanism: The upper feeding presser foot of the alternate pressing rod mechanism pushes the sewing material on the top surface of the sewing material.

Needle feeding mechanism: After the needle pierces the sewing material, due to the swing of the needle bar mechanism, it pushes the sewing material together with the lower feeding dog of the lower feeding mechanism.

Upper and lower composite feeding mechanism: the upper and lower feeding presser feet and lower feeding teeth that can be swung simultaneously act on the top surface and the back of the sewing material to push the sewing material together.

Upper and needle compound feeding mechanism: the upper feeding presser foot and the machine needle piercing the sewing material simultaneously act on the sewing material and push the sewing material together.

Needle and lower compound feeding mechanism: a mechanism that pushes the sewing material together by the needle piercing into the sewing material and the feeding dog acting on the sewing material at the same time.

Upper, needle and lower integrated feeding mechanism: the upper feeding presser foot and the lower feeding dog act simultaneously on the top and back of the sewing material when the needle pierces the sewing material to push the sewing material together.

Differential feeding mechanism: The feeding mechanism of the front and rear feeding dogs is independent of each other. This mechanism can independently adjust the feeding speed and feeding distance of the front and rear feeding dogs, so that the sewing material shrinks or stretches.

Roller feeding mechanism: the top surface of the sewing material is pressed by the upper roller, and the lower feeding roller is driven by the driving mechanism to push the sewing material on the back of the sewing material.

When the sewing machine is sewing after the thread loop is formed by the needle and the leader thread is passed through the sewing material, a mechanism hooks the thread loop to form a stitch. It is classified as:

Rotary hooking mechanism: a mechanism that completes hooking action with a rotating hooking piece, which is divided into:

Rotary hook thread hooking mechanism: The rotary hook body in the lock stitch sewing machine is driven by the rotating mechanism, which hooks the thread loop of the needle and sets it over the bobbin sleeve, and interweaves the hook thread to form the lock stitch.

Rotary hook and thread hooking mechanism: In single-thread chain stitch sewing machines, the hook, which is in the shape of a water chestnut without stitching, is driven by the rotating mechanism to hook the loop of the needle thread under the sewing material to form a single-thread chain stitch mechanism.

Swing hooking mechanism: The hooking action mechanism is completed with a swinging hooking piece.

Wobble hooking mechanism: The bobbin body in the lock stitch sewing machine is driven by a semi-rotating mechanism. The bobbin hook is used to hook the needle thread loop and wrap it over the bobbin and its bobbin sleeve and the bobbin thread to interweave with the hook thread to form a lock stitch. institution.

Looper hooking mechanism: In the chain-type sewing machine, a hooking member with a curved suture is worn, which swings back and forth to hook the loop on the needle or the thread on another hooking member to sew each other. , the mechanism that forms the chain stitch.

Thread hook hooking mechanism: In the single-thread chain stitch sewing machine, the hook-shaped hook without thread is driven by the swing mechanism to hook and expand the loop of the needle thread under the sewing material to form a single-thread chain stitch institution.

Needle hooking mechanism: There is a hooking part at the end that does not pass through the suture, which is driven by the swing mechanism, and the hooking thread is interconnected to form a chain stitch mechanism.

4. Needle bar mechanisms

When the sewing machine is sewing, the needle bar drives the needle belt to pierce the sewing material for sewing.

Fixed needle bar mechanism: The needle bar only reciprocates up and down in the needle bar hole of the machine head, and drives the needle with the thread to pierce the sewing material for sewing.

Oscillating needle bar mechanism: When the needle bar reciprocates up and down in the needle bar hole of the swing frame connected to the machine head when the stitching thread pierces the sewing material for sewing, the swing frame swings left and right or back and forth. The way of swinging includes swinging in a straight line from left to right or back and forth and swinging in an arc around the fulcrum.

5. Presser foot presser

A component that exerts pressure on the surface of the seam material. Presser foot is divided into lockstitch machine presser foot, overlock presser foot, and special machine presser foot according to its sewing machine performance. The presser foot is divided into ordinary presser foot and special presser foot according to its function. There are many types of special presser feet, such as hemming presser feet, feeding presser feet, double-needle presser feet, etc.

6. Presser bar mechanisms

A mechanism that exerts pressure on the surface of the sewing material. It is classified as:

Compression rod mechanism: There is a mechanism in that presser foot that exerts pressure on the surface of the sewing material.

Alternate pressing rod mechanism: There are two presser feet alternately pressing the material on the surface of the sewing material. One is a presser foot that does not move, and the other is a presser foot that moves with the material or needle.

Roller pressing mechanism: a pressing mechanism that has one or two rollers to exert pressure on the surface of the sewing material.

7. Presser bar lifting mechanisms

A mechanism for raising and releasing the pressure of the presser foot on the sewing material. Its categories are:

Portable mechanism: a mechanism that lifts and releases the pressure of the presser foot by using the dynamic presser foot wrench with the hand plate.

Knee-lifting and presser foot mechanism: a mechanism that uses the knee to lift and release the presser foot pressure through the lever system.

Foot-lifting presser foot mechanism: operate with a foot pedal, and lift and release the presser foot pressure mechanism through a lever system.

Electric, pneumatic, or hydraulic lifting presser foot mechanism: a mechanism that uses electromagnetic force, pneumatic pressure, or hydraulic pressure to lift and release the pressure of the presser foot.

Automatic presser foot lifting mechanism: After sewing, the presser foot automatically lifts the presser foot according to the control sequence.

8. Needle distance adjusting device

In a sewing machine, a device that specifically adjusts the length of the stitch length.

9. Material trimming device

During the sewing process, the sewing material is cut off. In the overlock sewing machine and the lock sewing machine with a knife, there is a device for cutting the waste edge of the sewing material. In the sewing machine for sewing leather, there is a device for cutting off the waste leather. In automatic sewing machines, there are devices for cutting thread tapes, decorative tapes, and other sewing materials.

10. Punching device

A device that makes holes in the sewing material during the sewing process. There is a device for opening the keyhole hole in the buttonhole machine. There is a device for opening pattern holes in an embroidery machine.

11. Winding device bobbin winder

A device for winding the thread from the bobbin to the bobbin. The built-in winding device is installed in the body of the sewing machine. The external winding device is installed on the table of the sewing machine.

12. Thread tension mechanisms

In order to make the suture smoothly form the stitch under a certain tension state, it is a device that applies a clamping force to the suture. The unit can be adjusted as needed.

13. Lubricating device

When the sewing machine is running, the device that provides lubricating oil is classified as:

A gravity lubrication device; relies on its own weight or capillary action to transport and distribute lubricating oil to the parts to be lubricated. Generally, the oil tank is used to transport oil through oil lines, oil pads, and oil pipes.

Pressurized lubrication device: The lubricating oil is pressurized and distributed through pipelines to various parts that need to be lubricated. Generally, gears, plugs, or centrifugal oil pumps are used.

Splash lubrication device: When the sewing machine is running, the rotation of the transmission parts soaked in the lubricating oil splashes the lubricating oil to the parts to be lubricated.

14. Oil suction device

During the sewing process, after the lubricated parts are continuously added with lubricating oil, it is necessary to absorb the remaining oil that cannot be freely returned to the oil reservoir to prevent overflow or leakage caused by excessive lubricating oil.

15. Automatic needle positioning device

A device that automatically stops the needle at a specified position when the sewing machine stops. Generally, there are two positions: the upper needle position and the lower needle position.

16. Automatic thread trimming device

A device that automatically cuts the stitches when the sewing machine finishes sewing.

17. Automatic thread wiping device

In the sewing machine with an automatic thread trimming device, after the needle thread is cut, in order to make the needle thread start sewing smoothly the second time, it is an automatic device that pulls the needle thread up from the needle hole of the needle plate.