CN210394754U

CN210394754U - Sewing machine pressure bar with buffer structure

Info

Publication number: CN210394754U
Application number: CN201920891411.2U
Authority: CN
Inventors: 卢锋峰; 卢律何
Original assignee: Zhejiang Guanghe Sewing Machine Co ltd
Current assignee: Zhejiang Guanghe Sewing Machine Co ltd
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-04-24
Anticipated expiration: 2029-06-13

Abstract

The utility model relates to a sewing machine technical field discloses a sewing machine depression bar with buffer structure. The compression bar comprises a compression bar body, a pressure foot arranged at the lower end of the compression bar body, an upper fixed block and a lower fixed block which are fixedly sleeved on the compression bar body, wherein a sliding block is arranged between the upper fixed block and the lower fixed block, the sliding block is sleeved on the compression bar body and is in up-and-down sliding fit with the compression bar body, a first compression spring and a second compression spring are sleeved on the compression bar body, the first compression spring is positioned between the upper fixed block and the sliding block, and the second compression spring is positioned between the lower fixed block and the sliding block. The utility model discloses slider can not take place the striking with last fixed block among the depression bar structure to increase the stability of depression bar structure, avoid the noise that the striking produced.

Description

Sewing machine pressure bar with buffer structure

Technical Field

The utility model belongs to the technical field of the sewing machine technique and specifically relates to a sewing machine depression bar with buffer structure is related to.

Background

A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a material to be sewn, thereby interweaving or stitching one or more layers of the material. The sewing machine can sew fabrics such as cotton, hemp, silk, wool, rayon and the like and products such as leather, plastics, paper and the like, and the sewed stitches are neat, beautiful, flat and firm, the sewing machine speed is high, the use is simple and convenient, so the sewing machine is widely used. A sewing machine generally includes a bed, a table provided on a surface of the bed, a presser foot provided above the table for pressing a cloth, and a head having a needle bar. Chinese patent publication No. CN207227702U discloses a presser foot driving mechanism of a sewing machine, which comprises a press rod penetrating through a casing, a crank hinged on the casing and a slide block sleeved on the press rod, wherein the slide block can drive the press rod to move up and down, a transmission pin is arranged on the crank, a driving block is rotatably connected on the transmission pin, a chute is arranged on the outer side surface of the slide block, the driving block is embedded in the chute and can slide left and right in the chute, a fixed block is also fixedly arranged on the press rod, the slide block can slide up and down on the press rod, the slide block is positioned between an upper fixed block and a lower fixed block, the slide block can be abutted against the upper fixed block, a spring is arranged between the slide block and the lower fixed block, the upper end of the spring is abutted against the slide block, the lower end of the spring is abutted against the lower fixed block, the transmission mechanism controls the slide block, the slider can strike the fixed block when upwards sliding, and long-time striking can make to go up and take place not hard up between fixed block and the depression bar, influences the stability of mechanism's operation, strikes the in-process in addition and produces the noise.

Disclosure of Invention

The utility model relates to an overcome prior art sewing machine depression bar structure in the slider with go up the problem that the fixed block striking leads to the stability variation, provide a sewing machine depression bar with buffer structure, the slider can not take place the striking with last fixed block among this depression bar structure to increase depression bar structure's stability, avoid the noise that the striking produced.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a sewing machine depression bar with buffer structure, includes the depression bar body, sets up the presser foot and the fixed block of establishing on the depression bar body of fixed cover at the depression bar body lower extreme and fixed block down, it is equipped with the slider to go up between fixed block and the fixed block down, the slider cover is located on the depression bar body and rather than upper and lower sliding fit, the cover is equipped with first compression spring and second compression spring on the depression bar body, first compression spring is located between fixed block and the slider, second compression spring is located down between fixed block and the slider.

The utility model adds the first compression spring between the upper fixed block and the slide block and the second compression spring between the lower fixed block and the slide block, the first spring and the second spring can provide the buffer function, and the slide block is prevented from being impacted with the upper fixed block and the fixed block, thereby increasing the stability of the structure and avoiding the generation of noise; in addition, in the prior art, only the spring is arranged between the lower fixing block and the sliding block, the spring can be caused to decrease due to long-time reciprocating motion, the working efficiency of the sewing machine is influenced, and the spring is arranged between the upper fixing block and the sliding block, so that the elastic action of the spring can be kept for a long time through the mutual matching action of the two springs, and the working efficiency of the sewing machine is kept.

Preferably, an extension spring is arranged between the sliding block and the upper fixing block, the upper end of the extension spring is fixedly connected with the upper fixing block, and the lower end of the extension spring is fixedly connected with the sliding block.

During the reciprocating motion process is made between last fixed block and lower fixed block to the slider, because the inertia effect of spring, after the depression bar upwards contracts back, the vibration of small amplitude about can taking place, influences the stability of structure, through set up extension spring between slider and last fixed block, after the depression bar upwards contracts back, upwards pulling force is exerted to the pole to the stay cord spring, alleviates the depression bar and takes place the range of vibration from top to bottom, increases the stability of structure.

Preferably, the upper fixing block is provided with a connecting part, and the upper end of the extension spring is fixedly connected with the connecting part.

Preferably, the pressure rod body is sleeved with a pressure rod shaft sleeve, and the pressure rod shaft sleeve is positioned between the lower fixing block and the pressure foot.

Preferably, an oil separation cap is sleeved outside the pressure rod shaft sleeve, the oil separation cap is cylindrical, an opening at the lower end of the oil separation cap is matched with the pressure rod shaft sleeve, and the diameter of an opening at the upper end of the oil separation cap is larger than that of the pressure rod shaft sleeve.

In the depression bar up-and-down motion in-process, for reducing the friction between slider and the depression bar, need scribble lubricating oil on the depression bar, increase the lubrication action between slider and the depression bar, the depression bar is reciprocal after operating for a long time from top to bottom, and lubricating oil can be along with the lower extreme of depression bar flow direction depression bar, pollutes the cloth, the utility model discloses a set up at the outside cover of depression bar axle sleeve and separate the oil cap, separate the upper end family mouth of oil cap upwards, can collect the lubricating oil that is more than, prevent the lower extreme of lubricating oil flow direction depression bar, cause the pollution to the cloth.

Preferably, the upper end of the pressure rod shaft sleeve abuts against the lower fixing block. The upper end of the pressure rod shaft sleeve abuts against the upper portion of the lower fixing block, and an oil separation cap outside the pressure rod shaft sleeve collects lubricating oil.

Preferably, the presser foot comprises a connecting part and a pressing plate, and the bottom of the pressing plate is of a convex arc structure. The arc structure that the clamp plate bottom is the evagination reduces the area of contact of clamp plate and cloth, when the fold appears in the cloth, because the area of contact of clamp plate and cloth is little, is difficult to press the fold region of cloth, makes things convenient for the cloth to sew.

Therefore, the utility model discloses following beneficial effect has: (1) the first spring and the second spring can prevent the sliding block from colliding with the upper fixed block and the fixed block, so that the stability of the structure is improved, and noise is avoided; (2) the mutual cooperation of the two springs can keep the elastic action of the springs for a long time and keep the working efficiency of the sewing machine.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Reference numerals

The pressing rod comprises a pressing rod body 1, a pressing foot 2, an upper fixing block 3, a lower fixing block 4, a sliding block 5, a first compression spring 6, a second compression spring 7, an extension spring 8, a connecting part 21, a pressing plate 22, a connecting part 31, a pressing rod shaft sleeve 9 and an oil separation cap 91.

Detailed Description

The technical solution of the present invention is further explained by the following specific embodiments.

Example 1

As fig. 1 is the utility model discloses a structural schematic diagram, sewing machine depression bar include depression bar body 1, set up last fixed block 3 and lower fixed block 4 established on the depression bar body at presser foot 2 and the fixed cover of depression bar body lower extreme, it is equipped with slider 5 to go up between fixed block and the lower fixed block, the slider cover is located on the depression bar body and rather than upper and lower sliding fit, the cover is equipped with first compression spring 6 and second compression spring 7 on the depression bar body, first compression spring is located between fixed block and the slider, second compression spring is located down between fixed block and the slider, and first spring and second spring can play the cushioning effect, prevent to take place the striking between slider and last fixed block and the fixed block to increase the stability ability of structure and avoid the noise to produce. Be equipped with extension spring 8 between slider and the last fixed block, be equipped with connecting portion 31 on the last fixed block, extension spring's upper end and connecting portion fixed connection, extension spring's lower extreme and slider fixed connection, upwards pulling force is applyed to the pole to the stay cord spring, alleviates the depression bar and takes place the range of vibration from top to bottom, increases the stability of structure. The pressing rod comprises a pressing rod body, and is characterized in that a pressing rod shaft sleeve 9 is sleeved on the pressing rod body, the pressing rod shaft sleeve is located between a lower fixing block and a pressing foot, the upper end of the pressing rod shaft sleeve abuts against the lower fixing block, an oil separation cap 91 is sleeved outside the pressing rod shaft sleeve and made of rubber, the oil separation cap is cylindrical, an opening in the lower end of the oil separation cap is matched with the pressing rod shaft sleeve, the diameter of the opening in the upper end of the oil separation cap is larger than that of the pressing rod shaft sleeve, and the oil separation cap can collect excessive lubricating oil to prevent the lubricating oil from flowing to the lower end of the pressing rod and polluting; the presser foot comprises a connecting part 21 and a pressing plate 22, and the bottom of the pressing plate is of a convex arc structure.

The cloth is compressed by moving the pressure lever downwards in the working process of the sewing machine pressure lever, and the compressed cloth is loosened by lifting the pressure lever upwards. The process of moving the press rod downwards is that the slide block 5 is driven by external force to move downwards to drive the press rod to move downwards, the slide block 5 cannot collide with the lower fixing block 4 due to the buffering effect of the second spring 7, and the presser foot has a buffering effect on the downward pressing of the cloth, so that the damage to parts of the press rod is prevented; the upward lifting pressure rod process drives the sliding block 5 to move upwards through external force, the first compression spring between the sliding block 5 and the upper fixing block 3 plays a role in buffering, impact between the sliding block 5 and the upper fixing block 3 is avoided, and the noise and the damage caused by collision of parts are reduced. During the reciprocating motion process is made between last fixed block and lower fixed block to the slider, because the inertia effect of spring, after the depression bar upwards contracts back, the vibration of small amplitude about can taking place, influences the stability of structure, through set up extension spring 8 between slider and last fixed block, after the depression bar upwards contracts back, upwards pulling force is exerted to the pole to the stay cord spring, alleviates the depression bar and takes place the range of vibration from top to bottom, increases the stability of structure.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent changes without departing from the technical scope of the present invention.

Claims

1. The utility model provides a sewing machine depression bar with buffer structure, its characterized in that, includes depression bar body (1), sets up last fixed block (3) and lower fixed block (4) of establishing on the depression bar body at presser foot (2) and the fixed cover of depression bar body lower extreme, it is equipped with slider (5) to go up between fixed block and the lower fixed block, the slider cover is located on the depression bar body and rather than upper and lower sliding fit, the cover is equipped with first compression spring (6) and second compression spring (7) on the depression bar body, first compression spring is located between fixed block and the slider, second compression spring is located down between fixed block and the slider.

2. The sewing machine presser bar with cushion structure of claim 1, characterized in that an extension spring (8) is arranged between said slider and the upper fixed block, the upper end of said extension spring is fixedly connected with the upper fixed block, and the lower end of said extension spring is fixedly connected with the slider.

3. The sewing machine presser bar with cushion structure according to claim 2, wherein said upper fixing block is provided with a connecting portion (31), and an upper end of said extension spring is fixedly connected with said connecting portion.

4. The sewing machine presser bar with buffer structure of claim 1, wherein a presser bar bushing (9) is sleeved on the presser bar body, and the presser bar bushing is located between the lower fixing block and the presser bar.

5. The sewing machine presser bar with a cushion structure according to claim 4, wherein an oil separation cap (91) is sleeved outside the presser bar sleeve, the oil separation cap is cylindrical, a lower end opening of the oil separation cap is matched with the presser bar sleeve, and a diameter of an upper end opening of the oil separation cap is larger than that of the presser bar sleeve.

6. The sewing machine presser bar with a cushion structure according to claim 5, wherein the upper end of the presser bar sleeve abuts against the lower fixing block.

7. The presser bar with buffer structure of claim 5, wherein said presser foot comprises a connecting portion (21) and a pressing plate (22), and the bottom of said pressing plate is a convex arc structure.