CN205295680U - Sewing needle pole oil return mechanism - Google Patents

Abstract

The utility model discloses a sewing machine needle bar oil return mechanism, which comprises a casing, a needle bar, and a needle bar cover. The needle bar and the needle bar cover are sleeved and assembled on the casing. Oil component, annular oil cotton, the oil scraping component is fixed on the casing, the oil scraping component is axially coordinated with the needle bar, the oil cotton is located under the oil scraping component, and there is also a device under the oil cotton to facilitate the oil cotton The oil-absorbing component that absorbs the oil stains. There is an oil scraper assembly under the needle bar cover, which is equivalent to two oil-proof measures on the needle bar, which is better than the previous single-line oil-proof measures. The oil scraping assembly consists of two oil scraping oil seal intervals, which are cleaner and better in oil scraping effect than a single scraping oil. There is an oil absorption component under the annular oil cotton to avoid affecting the oil absorption effect due to too much oil stored in the annular oil cotton, and to maintain the oil absorption effect of the annular oil cotton at all times. The utility model belongs to the technical field of oil leakage prevention for sewing machines.

Description

A sewing machine needle bar oil return mechanism

technical field

The utility model belongs to the technical field of oil leakage prevention for sewing machines, and more specifically relates to an oil return mechanism for a needle bar of a sewing machine.

Background technique

A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material to interweave or sew one or more layers of sewing material. The sewing machine can sew fabrics such as cotton, fiber crops, silk, wool, and artificial fibers, and products such as leather, plastics, and paper. A general sewing machine consists of four parts: machine head, machine base, transmission and accessories. The machine head is the main part of the sewing machine. It is composed of four mechanisms: barbed material, thread hook, thread take-up, and feeding, and auxiliary mechanisms such as winding, pressing, and falling teeth. The material is sewn together.

Since the needle bar of the overlock sewing machine is driven at high speed in the vertical direction, it is necessary to have lubricating oil to prevent the machine from being damaged by frictional heat and to perform pleats at high speed and smoothly. At this time, in order to prevent it from being supplied to the needle bar and complete The lubricating oil leakage of the lubricating effect contaminates the sewing product and a recovery mechanism is installed. The needle bar oil return of the existing overlock sewing machine is divided into half-pack type and full-pack type. The half-pack needle bar oil return uses half a piece of oil cotton to contact the second half of the needle bar to return the oil, and the first half of the oil cannot be absorbed; the existing The all-inclusive needle bar oil return, although the needle bar is completely covered by the ring oil cotton, but the oil return effect cannot be achieved in time when the oil volume is too large, and the oil is thrown out, and the all-inclusive needle bar return oil of the prior art The oil installation method is threaded connection between the needle bar sleeve and the oil return pan, which is prone to loosening when the machine is running at high speed.

Utility model content

Aiming at the deficiencies in the prior art, the purpose of the utility model is to provide a sewing machine needle bar oil return mechanism which prevents oil from splashing and can return oil.

In order to achieve the above purpose, the utility model provides the following technical solutions: a needle bar oil return mechanism of a sewing machine, including a casing, a needle bar, and a needle bar cover, and the needle bar and the needle bar cover are socketed and assembled on the casing , there is an oil scraper assembly and an annular oil cotton under the needle bar sleeve, the oil scraper assembly is fixed on the casing, the oil scraper assembly cooperates with the axial movement of the needle bar, the oil cotton is located under the oil scraper assembly, and the oil cotton There is also an oil-absorbing component below which is convenient for absorbing the oil stains on the oil cotton.

The oil scraping assembly includes an oil scraping oil seal, and the oil scraping oil seal is provided with an axial through hole, and the shape and size of the through hole match the outer diameter of the needle rod.

The scraper oil seals are divided into two groups, which are arranged in parallel in the axial direction with a gap between them.

The oil absorbing assembly includes an oil receiving pan, a suction pipe and an oil pump. The oil receiving pan is used to catch oil stains on the annular oil cotton, and the oil receiving pan and the suction pipe communicate through an oil hole.

The oil receiving pan is buckled with the needle bar sleeve and screwed with the casing.

The annular oil cotton is a return oil felt washer.

The beneficial effect of the needle bar oil return mechanism of the utility model is that: the movable oil scraping oil seal is added on the annular oil cotton, and the movable oil scraping oil seal can scrape part of the oil while moving up and down with the needle bar, and the oil cotton Suck away, the remaining small amount of oil is directly sucked away by the oil cotton, realizing double-layer protection, avoiding the oil throwing phenomenon of the needle bar, and at the same time using the oil pump to force the oil on the oil cotton to ensure the oil absorption capacity of the oil cotton Oil return effect.

1. There is an oil scraper assembly under the needle bar cover, which is equivalent to two oil-proof measures on the needle bar, which is better than the previous single-line oil-proof measures.

2. The oil scraping assembly is composed of two oil scraping oil seal intervals, which is cleaner and better in oil scraping effect than a single oil scraper.

3. There is an oil-absorbing component under the annular oil cotton to avoid affecting the oil absorption effect due to too much oil stains stored in the annular oil cotton, and to maintain the oil absorption effect of the annular oil cotton at all times.

Description of drawings

Fig. 1 is a partial sectional view of the utility model.

Fig. 2 is a schematic diagram of partial explosion of the utility model.

Reference signs: 1. casing, 2. needle bar, 3. needle bar cover, 4. oil scraper assembly, 5. annular oil cotton, 6.1. oil receiving tray, 6.2. suction pipe, 6.3. oil pump.

detailed description

Referring to Fig. 1 to Fig. 2, the embodiment of the needle bar oil return mechanism of the sewing machine of the present invention will be further described.

There is only one annular oil cotton on the existing needle bar, and it is easy to store too much oil after oil absorption, and the oil absorption effect of a single annular oil cotton is limited, so the utility model is a sewing machine needle bar oil return mechanism, including a casing 1 , the needle bar 2, the needle bar cover 3, the needle bar 2 and the needle bar cover 3 are socketed and assembled on the casing 1, the oil scraper assembly 4 and the annular oil cotton 5 are arranged under the needle bar cover 3, the The oil scraping assembly 4 described above is fixed on the casing 1, and the oil scraping assembly 4 cooperates axially with the needle bar 2. The oil cotton is located under the oil scraping assembly 4, and there is also a ring under the oil cotton 5 to facilitate the installation of the annular oil cotton 5. Oil absorbing unit for oil stain removal. The oil scraping assembly 4 includes an oil scraping oil seal, and the oil scraping oil seal is provided with an axial through hole, and the shape and size of the outer diameter of the through hole are matched with the needle rod 2 .

In order to improve the oil scraping effect, the oil scraping oil seals of the utility model are divided into two groups, which are arranged side by side in the axial direction with a gap between them.

As this embodiment, the oil absorbing assembly includes an oil receiving pan 6.1, a suction pipe 6.2 and an oil pump 6.3, the oil receiving pan 6.1 is used to catch the oil stains on the annular oil cotton 5, and the oil hole is passed between the oil receiving pan 6.1 and the suction pipe 6.2 connected. The oil-absorbing assembly designed by the utility model generates high negative pressure, which can forcefully absorb the oil on the annular oil cotton 5 to ensure sufficient oil-absorbing effect of the annular oil cotton 5 .

In order to further ensure the firmness of the oil receiving tray 6.1 and avoid loosening during the working process, the oil receiving tray 6.1 is buckled with the needle bar sleeve 3 and screwed with the casing 1 .

Considering the cost, on the basis of ensuring the oil absorption effect and reducing the production cost, the annular oil cotton 5 selected by the utility model is the return oil felt washer.

In summary, the utility model has the following advantages: 1. There is an oil scraper assembly under the needle bar sleeve, which is equivalent to two oil-proof measures on the needle bar, which is better than the previous single-way oil-proof measures .

2. The oil scraping assembly is composed of two oil scraping oil seal intervals, which is cleaner and better in oil scraping effect than a single oil scraper.

3. There is an oil-absorbing component under the annular oil cotton to avoid affecting the oil absorption effect due to too much oil stains stored in the annular oil cotton, and to maintain the oil absorption effect of the annular oil cotton at all times.

Claims (6)

1. a needle bar of sewing machine oil return mechanism, including casing (1), shank (2), shank set (3), described shank (2) and shank set (3) are socketed and are assemblied in casing (1), it is characterized in that: shank set (3) be connected with frizing assembly (4), annular oil cotton (5), described frizing assembly (4) is fixed in casing (1), frizing assembly (4) and shank (2) axially clearance fit, oil cotton is positioned at frizing assembly (4) lower section, and the lower section of oil cotton is additionally provided with the oil suction component being easy to be siphoned away by the oil stain on annular oil cotton (5).

2. a kind of needle bar of sewing machine oil return mechanism according to claim 1, it is characterised in that: described frizing assembly (4) includes frizing oil sealing, and frizing oil sealing is provided with the outer diameter shape size of axially extending bore, described through hole and shank (2) and all matches.

3. a kind of needle bar of sewing machine oil return mechanism according to claim 2, it is characterised in that: described frizing oil sealing is two groups, in be axially arranged in juxtaposition and between be provided with gap.

4. a kind of needle bar of sewing machine oil return mechanism according to claim 1, it is characterized in that: described oil suction component includes oil drain pan (6.1), suction pipe (6.2) and oil pump (6.3), oil drain pan (6.1) is used for catching the oil stain on annular oil cotton (5), communicates through oilhole between oil drain pan (6.1) with suction pipe (6.2).

5. a kind of needle bar of sewing machine oil return mechanism according to claim 4, it is characterised in that: described oil drain pan (6.1) and shank set (3) snapping and be spirally connected with casing (1).

6. a kind of needle bar of sewing machine oil return mechanism according to claim 1, it is characterised in that: described annular oil cotton (5) is oil return felt.