CN216864531U

CN216864531U - Upper shaft of needle bar of sewing machine

Info

Publication number: CN216864531U
Application number: CN202220405679.2U
Authority: CN
Inventors: 罗锦华
Original assignee: New Sewing Machine Technology Ningbo Co ltd
Current assignee: New Sewing Machine Technology Ningbo Co ltd
Priority date: 2022-02-26
Filing date: 2022-02-26
Publication date: 2022-07-01
Anticipated expiration: 2032-02-26

Abstract

The application discloses an upper shaft of a needle bar of a sewing machine, which belongs to the technical field of sewing machines and comprises an upper shaft body; the oil cavity is formed in the connecting shaft, an oil hole is formed in the limiting wheel and is communicated with the oil cavity, an oil absorption cotton core is embedded in the limiting wheel, one end of the oil absorption cotton core is embedded in the oil hole, and the other end of the oil absorption cotton core penetrates through the outer wall of the limiting wheel; one end of the connecting shaft, which is far away from the limiting wheel, is arranged in a penetrating manner, and the connecting shaft, which is far away from the limiting wheel, is embedded with the connecting seat in a threaded manner; and a stop block is arranged at the position, far away from the limiting wheel, on the inner wall of the oil cavity, and a sealing ring is arranged on one surface, facing the connecting seat, of the stop block. The upper shaft of the needle bar of the sewing machine has the functions of lubrication and adjustment.

Description

Upper shaft of needle bar of sewing machine

Technical Field

The application relates to the technical field of sewing machines, in particular to an upper shaft of a needle bar of a sewing machine.

Background

A sewing machine is a machine that uses one or more sewing threads to form one or more stitches in a work material to interlace or stitch one or more layers of the work material. The sewing machine can sew fabrics such as cotton, hemp, silk, wool, artificial fiber and the like and products such as leather, plastic, paper and the like, and the sewed stitches are neat, beautiful, flat and firm, the sewing speed is high, and the use is simple and convenient.

In the process of implementing the application, the inventor finds that at least the following problems exist in the technology: the sewing machine generally adopts the mode of upper shaft and lower shaft linkage, drives the reciprocating motion of needle bar, reaches the purpose of making up, and wherein the both ends of upper shaft use the axle sleeve to fix a position, and in the sewing machine working process, the upper shaft rotates for the axle sleeve is quick, but, upper shaft and axle sleeve easily go up rust, lead to the frictional force increase between upper shaft and the axle sleeve, influence the transmission of power. Therefore, the upper shaft of the needle bar of the sewing machine is provided to solve the problems.

SUMMERY OF THE UTILITY MODEL

The application aims to solve the problems that in the prior art, the upper shaft and the shaft sleeve are easily rusted, so that the friction force between the upper shaft and the shaft sleeve is increased, and the transmission of power is influenced, and the needle bar upper shaft of the sewing machine is provided.

In order to achieve the above purpose, the present application provides the following technical solutions: an upper shaft of a needle bar of a sewing machine comprises an upper shaft body;

the oil cavity is formed in the connecting shaft, an oil hole is formed in the limiting wheel and communicated with the oil cavity, an oil absorption cotton core is embedded in the limiting wheel, one end of the oil absorption cotton core is embedded into the oil hole, and the other end of the oil absorption cotton core penetrates through the outer wall of the limiting wheel.

Through the technical scheme, after lubricating oil is injected into the oil cavity, the lubricating oil in the oil cavity can be immersed into the oil absorption cotton core through the oil hole, the upper shaft body continuously rotates with the limiting wheel in the rotating working process of the upper shaft body, the oil absorption cotton core immersed with the lubricating oil rubs with the shaft sleeve of the sewing machine, the lubricating purpose can be achieved, and the friction resistance between the shaft sleeve and the limiting wheel is reduced as much as possible.

Preferably, one end of the connecting shaft, which is far away from the limiting wheel, is arranged in a penetrating manner, and the connecting shaft, which is far away from the limiting wheel, is embedded with the connecting seat in a threaded manner.

Through above-mentioned technical scheme, the connecting seat is demolishd the back, can be to the inside clearance of oil pocket.

Preferably, a stop block is arranged on the inner wall of the oil cavity at a position far away from the limiting wheel, and a sealing ring is arranged on one surface of the stop block facing the connecting seat.

Through above-mentioned technical scheme, the dog is used for stopping the connecting seat is spacing, and the sealing washer can improve the sealed effect of connecting seat, avoids the lubricating oil water clock as far as possible.

Preferably, a second transmission shaft is fixed in the center of one end, far away from the oil cavity, of the connecting seat, the second transmission shaft is of a rectangular structure, and the second transmission shaft is in matched insertion connection with the upper shaft body.

Through the technical scheme, after the second transmission shaft is separated from the upper shaft body, the connecting seat can be detached. The second transmission shaft with the rectangular structure can ensure the power transmission between the limiting wheel and the upper shaft body.

Preferably, a fixing bolt penetrates through the outer wall of the upper shaft body at a position close to the connecting shaft in a threaded manner, and a threaded hole in threaded fit with the fixing bolt is formed in the second transmission shaft.

Through above-mentioned technical scheme, fixing bolt and screw hole screw-thread fit can be fixed the second transmission shaft is spacing, avoids second transmission shaft to break away from in the upper shaft body working process as far as possible.

Preferably, the outer wall of the connecting shaft is in threaded connection with an oiling bolt, and the oiling bolt is embedded into the oil cavity.

Through the technical scheme, after the oiling bolt is detached, lubricating oil can be injected towards the inside of the oil cavity.

Preferably, the upper shaft body is divided into two halves, a first transmission shaft is movably sleeved between the two halves of the upper shaft body, and the first transmission shaft is of a rectangular structure.

Through above-mentioned technical scheme, two sections upper shaft bodies can slide along first transmission shaft, adjust the distance between a pair of spacing wheel to be applicable to different sewing machine's installation size, first transmission shaft is the rectangle structure, can guarantee the power transmission between two sections upper shaft bodies.

Preferably, the two sections of upper shaft bodies are fixedly sleeved with fixed sleeve plates at positions close to the first transmission shaft, a common thread of one end of each of the fixed sleeve plates penetrates through an adjusting screw rod, and the other end of each of the fixed sleeve plates penetrates through a guide rod in a common movement mode.

Through the technical scheme, when the adjusting screw rod rotates, the pair of fixed sleeve plates can drive the two sections of upper shaft bodies to be close to or far away from each other, so that the purpose of adjustment is achieved. In the adjusting process of the two sections of upper shaft bodies, the pair of fixed sleeve plates slide along the guide rod, and the limiting and guiding effects can be achieved.

To sum up, the technical effect and the advantage of this application: the oil cavity formed in the connecting shaft is benefited, after lubricating oil is injected into the oil cavity, the lubricating oil in the oil cavity can flow into the oil hole and immerse into the oil absorption cotton core along with the rotation work of the upper shaft body, the oil absorption cotton core immersed with the lubricating oil rubs with the positioning limiting shaft sleeve of the limiting wheel on the sewing machine, the aim of lubrication can be achieved, and the friction resistance between the shaft sleeve and the limiting wheel is reduced as much as possible. Thanks to the first transmission shaft movably sleeved between the two sections of upper shaft bodies, when the adjusting block is screwed to drive the adjusting screw rod to rotate, the pair of fixed sleeve plates can drive the two sections of upper shaft bodies to be away from each other, so that the purpose of adjusting the distance between the pair of limiting wheels is achieved, and the sewing machine adjusting device is suitable for installation sizes of different sewing machines.

Drawings

FIG. 1 is a schematic overall structure of the present application;

FIG. 2 is an enlarged view at A in FIG. 1 of the present application;

FIG. 3 is a schematic view of the structure of the limit wheel of the present application;

fig. 4 is a schematic view of the internal structure of the connecting shaft of the present application.

Description of reference numerals: 1. an upper shaft body; 2. a belt pulley; 3. a driving wheel; 4. a limiting wheel; 5. a connecting shaft; 6. fixing the bolt; 7. fixing the sleeve plate; 8. adjusting the screw rod; 9. an adjusting block; 10. a guide bar; 11. a first drive shaft; 12. a limiting block; 13. an oil absorbent cotton core; 14. a second drive shaft; 15. a threaded hole; 16. oiling bolts; 17. an oil chamber; 18. a connecting seat; 19. a stopper; 20. a seal ring; 21. and an oil hole.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without any creative work based on the embodiments in the present application belong to the protection scope of the present application.

Referring to fig. 1, an upper shaft of a needle bar of a sewing machine comprises an upper shaft body 1, wherein one end of the upper shaft body 1 is provided with a belt pulley 2 for power transmission with a lower shaft of the sewing machine. The other end of the upper shaft body 1 is provided with a driving wheel 3 for power transmission between the upper shaft body 1 and the needle rod.

Referring to fig. 1, the upper shaft body 1 is provided with the limiting wheels 4 at positions close to the two ends, the upper shaft body 1 is horizontally arranged in a sewing machine during installation, a shaft sleeve is arranged in the sewing machine, and the shaft sleeve is sleeved on the pair of limiting wheels 4 to realize installation and positioning of the upper shaft body 1.

Referring to fig. 1-2, the upper shaft body 1 is divided into two halves, a first transmission shaft 11 is movably sleeved between the two upper shaft bodies 1, the two upper shaft bodies 1 can slide along the first transmission shaft 11, and the distance between a pair of limiting wheels 4 is adjusted to be suitable for the installation sizes of different sewing machines. The first transmission shaft 11 is of a rectangular structure, and can ensure power transmission between the two sections of upper shaft bodies 1.

Referring to fig. 1-2, the two sections of upper shaft bodies 1 are fixedly sleeved with fixed sleeve plates 7 at positions close to the first transmission shaft 11, and the fixed sleeve plates 7 are parallel to each other. An adjusting screw 8 is threaded through the common thread at one end of the pair of fixed sleeve plates 7, and when the adjusting screw 8 rotates, the pair of fixed sleeve plates 7 can drive the two sections of upper shaft bodies 1 to approach or separate from each other, so that the purpose of adjustment is achieved.

Referring to fig. 1-2, an adjusting block 9 is fixed at one end of the adjusting screw 8, and the adjusting block 9 is rotatably mounted on the fixed sleeve plate 7 and is used for driving the adjusting screw 8 to rotate. The other end of the adjusting screw 8 is fixed with a limiting block 12 for limiting the pair of fixed sleeve plates 7 and preventing the pair of fixed sleeve plates 7 from falling off from the first transmission shaft 11 as much as possible.

Referring to fig. 1-2, the other end of the pair of fixed sleeve plates 7 jointly movably penetrates through a guide rod 10, and in the adjusting process of the two sections of upper shaft bodies 1, the pair of fixed sleeve plates 7 slide along the guide rod 10 to play a role in limiting and guiding.

Referring to fig. 1, 3 and 4, one end of the limiting wheel 4 facing the middle of the upper shaft body 1 is fixedly connected with a connecting shaft 5, and an oil cavity 17 is formed inside the connecting shaft 5. An oiling bolt 16 is connected to the outer wall of the connecting shaft 5 in a threaded manner, the oiling bolt 16 is embedded into the oil cavity 17, and lubricating oil can be injected into the oil cavity 17 after the oiling bolt 16 is removed.

Referring to fig. 3-4, an oil hole 21 is opened inside the stopper wheel 4, and the oil hole 21 communicates with the oil chamber 17. An oil absorption cotton core 13 is embedded in the limiting wheel 4, one end of the oil absorption cotton core 13 is embedded in the oil hole 21, and lubricating oil in the oil cavity 17 can be immersed in the oil absorption cotton core 13 through the oil hole 21.

Referring to fig. 3-4, the other end of the oil absorbent cotton core 13 penetrates through the outer wall of the limiting wheel 4, when the upper shaft body 1 rotates, the upper shaft body 1 and the limiting wheel 4 rotate continuously, the oil absorbent cotton core 13 soaked with lubricating oil rubs against a shaft sleeve of the sewing machine, so that the purpose of lubrication can be achieved, and the friction resistance between the shaft sleeve and the limiting wheel 4 is reduced as much as possible.

Referring to fig. 3-4, one end of the connecting shaft 5, which is far away from the limiting wheel 4, is arranged in a penetrating manner, and one end of the connecting shaft 5, which is far away from the limiting wheel 4, is embedded with a connecting seat 18 in a threaded manner, so that the interior of the oil cavity 17 can be cleaned after the connecting seat 18 is detached.

Referring to fig. 3-4, a stop 19 is arranged on the inner wall of oil chamber 17 at a position far away from limiting wheel 4, and stop 19 is used for limiting and stopping connecting seat 18. One surface of stop block 19 towards connecting seat 18 is provided with sealing washer 20, can improve the sealed effect of connecting seat 18, avoids the lubricating oil dribbling as far as possible.

Referring to fig. 1, 3 and 4, a second transmission shaft 14 is centrally fixed at one end of the connecting seat 18 away from the oil cavity 17, the second transmission shaft 14 is of a rectangular structure, the second transmission shaft 14 is in matched insertion connection with the upper shaft body 1, and when the second transmission shaft 14 is separated from the upper shaft body 1, the connecting seat 18 can be detached. The second transmission shaft 14 with a rectangular structure can ensure the power transmission between the limiting wheel 4 and the upper shaft body 1.

Referring to fig. 1, 3 and 4, a fixing bolt 6 is threaded on the outer wall of the upper shaft body 1 at a position close to the connecting shaft 5, and the fixing bolt 6 is aligned with the second transmission shaft 14. The threaded hole 15 is formed in the second transmission shaft 14, the fixing bolt 6 is in threaded fit with the threaded hole 15, the second transmission shaft 14 can be limited and fixed, and the second transmission shaft 14 is prevented from being separated from the upper shaft body 1 in the working process as much as possible.

When the adjusting device is used, the adjusting block 9 is screwed to drive the adjusting screw 8 to rotate, the pair of fixed sleeve plates 7 can drive the two sections of upper shaft bodies 1 to be away from each other, and the guide rod 10 can limit and guide the pair of fixed sleeve plates 7, so that the purpose of adjusting the distance between the pair of limiting wheels 4 is achieved.

Lubricating oil is injected into the oil cavity 17, and in the rotating working process of the upper shaft body 1, the lubricating oil in the oil cavity 17 can flow into the oil hole 21 and dip into the oil absorption cotton core 13, and along with the continuous rotation of the upper shaft body 1 and the limiting wheel 4, the oil absorption cotton core 13 dipped with the lubricating oil rubs with the limiting shaft sleeve, so that the lubricating purpose can be achieved, and the friction resistance between the shaft sleeve and the limiting wheel 4 is reduced as much as possible.

Finally, it should be noted that: although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or some features may be replaced with equivalents, and any modifications, equivalents, improvements, etc. that fall within the spirit and scope of the present application are intended to be covered by the present application.

Claims

1. An upper shaft of a needle bar of a sewing machine comprises an upper shaft body (1);

the method is characterized in that: the oil-absorbing cotton-core-type upper shaft is characterized in that the positions, close to two ends, of the upper shaft body (1) are provided with limiting wheels (4), the limiting wheels (4) face towards one end of a connecting shaft (5) fixedly connected to the middle of the upper shaft body (1), an oil cavity (17) is formed in the connecting shaft (5), oil holes (21) are formed in the limiting wheels (4), the oil holes (21) are communicated with the oil cavity (17), oil-absorbing cotton cores (13) are embedded in the limiting wheels (4), one ends of the oil-absorbing cotton cores (13) are embedded in the oil holes (21), and the other ends of the oil-absorbing cotton cores (13) penetrate through the outer wall of the limiting wheels (4).

2. The upper shaft of claim 1, wherein: the connecting shaft (5) is far away from one end of the limiting wheel (4) and penetrates through the connecting shaft, and a connecting seat (18) is embedded in a thread at one end of the connecting shaft (5) far away from the limiting wheel (4).

3. The upper shaft of claim 2, wherein: a stop block (19) is arranged on the inner wall of the oil cavity (17) at a position far away from the limiting wheel (4), and a sealing ring (20) is arranged on one surface, facing the connecting seat (18), of the stop block (19).

4. The upper shaft of claim 2, wherein: a second transmission shaft (14) is centrally fixed at one end, far away from the oil cavity (17), of the connecting seat (18), the second transmission shaft (14) is of a rectangular structure, and the second transmission shaft (14) is matched and spliced with the upper shaft body (1).

5. The upper shaft of claim 4, wherein: the fixing bolt (6) penetrates through the outer wall of the upper shaft body (1) at a position close to the connecting shaft (5) in a threaded mode, and a threaded hole (15) matched with the fixing bolt (6) in a threaded mode is formed in the second transmission shaft (14).

6. The upper shaft of claim 1, wherein: and an oiling bolt (16) is connected to the outer wall of the connecting shaft (5) in a threaded manner, and the oiling bolt (16) is embedded into the oil cavity (17).

7. The upper shaft of claim 1, wherein: the upper shaft body (1) is divided into two halves, a first transmission shaft (11) is movably sleeved between the two halves of the upper shaft body (1), and the first transmission shaft (11) is of a rectangular structure.

8. The upper shaft of claim 7, wherein: two sections all fixed the cover in the position department that upper shaft body (1) is close to first transmission shaft (11) is equipped with fixed lagging (7), and is a pair of adjusting screw (8) are worn to be equipped with by the common screw thread of the one end of fixed lagging (7), and a pair of guide bar (10) are worn to be equipped with by the common activity of the other one end of fixed lagging (7).