CN210765820U - Oil-proof device for needle bar of sewing machine - Google Patents

Abstract

The utility model provides a grease proofing device of sewing machine needle bar belongs to sewing machine technical field. The technical problems that the oil-proof effect of a needle bar of a sewing machine is poor, the quality of a sewn fabric of the sewing machine is poor and the like are solved. The oil-proof device comprises an oil absorption material piece for absorbing redundant lubricating oil between the needle bar and the needle bar lower bushing and an oil absorption pipe for discharging the lubricating oil in the oil absorption material piece; the oil absorption material piece is sleeved on the peripheral surface of the needle rod and has a gap with the peripheral surface of the needle rod, and the oil absorption material piece is positioned below the lower bushing of the needle rod or positioned in the lower bushing of the needle rod close to the lower end surface of the lower bushing of the needle rod; one end of the oil suction pipe is communicated to the oil suction material part, and the other end of the oil suction pipe is connected with an oil suction power source. The utility model discloses when normally functioning between needle bar and needle bar lower liner, oil absorption material spare can absorb unnecessary lubricating oil, guarantees to make up the quality of surface fabric, and unnecessary lubricating oil circulated use has reduced the lubricated cost of equipment.

Description

Oil-proof device for needle bar of sewing machine

Technical Field

The utility model belongs to the technical field of sewing machine, a grease proofing device of sewing machine needle bar is related to.

Background

In the process of sewing the sewing material, the needle moves up and down in a reciprocating way relative to the lining, and lubricating oil is usually coated between the needle and the lining for lubrication so as to reduce the wear degree of the needle and the lining; however, the lubricating oil flows into the gap between the needle rod and the lining to form an oil ring, the oil ring easily flows downwards along the needle rod under the action of gravity, and when the needle rod is started, the lubricating oil is likely to flow out of the lining along the needle rod, so that the lubricating oil is splashed on a bedplate or sewing materials, the sewing materials are polluted, and the sewing quality is seriously influenced.

Chinese patent (publication No. CN 204875131U; bulletin No. 2015-12-16) discloses an oil return device for a needle rod of an overedger, which comprises a needle rod body and an oil return groove arranged at the lower end of the needle rod body, wherein an oil return scraping blade is arranged in the oil return groove, an oiled felt is arranged at the upper end of the oil return groove, a sealing ring is arranged at the lower end of the oil return groove, an oil return hole is formed in the outer side of the bottom of the oil return groove, an oil line is arranged on the oiled felt, the oil line penetrates through the oil return hole and penetrates into an oil pipe arranged on one side of the needle rod body, a shaft sleeve is further arranged at the upper end of the oiled felt, a shifting sheet is arranged at the upper end.

In the process of rubbing the oil return scraper with the felt, the oil-proof capability of the oil return scraper disclosed in the above patent document is continuously reduced, so that the oil-proof effect of the oil return device of the needle bar of the overedger is poor.

Disclosure of Invention

The utility model discloses to the above-mentioned problem that prior art exists, provide a grease proofing device of sewing machine needle bar, the utility model aims to solve the technical problem that: how to improve the oil-proof effect of the needle bar so as to improve the quality of the sewing fabric of the sewing machine.

The purpose of the utility model can be realized by the following technical proposal:

an oil-proof device for a needle bar of a sewing machine, wherein a needle bar lower bushing is sleeved on a needle bar of the sewing machine, and the oil-proof device is characterized by comprising an oil absorption material piece and an oil absorption pipe, wherein the oil absorption material piece is used for absorbing redundant lubricating oil between the needle bar and the needle bar lower bushing; the oil absorption material piece is sleeved on the outer peripheral surface of the needle rod, a gap is reserved between the oil absorption material piece and the outer peripheral surface of the needle rod, and the oil absorption material piece is positioned below the lower bushing of the needle rod or positioned in the lower bushing of the needle rod close to the lower end surface of the lower bushing of the needle rod; one end of the oil suction pipe is communicated to the oil suction material part, and the other end of the oil suction pipe is connected with an oil suction power source.

The working principle is as follows: the oil absorption material spare that sets up among this technical scheme overlaps the peripheral face at the needle bar, and the needle bar can reciprocate in oil absorption material spare and needle bar lower bushing, noninterference, and oil absorption material spare can the hoop absorb the lubricating oil that is located between needle bar and the needle bar lower bushing. Particularly, when the needle rod moves upwards, the oil on the surface of the needle rod can be partially blocked by the lower end surface of the lower bushing of the needle rod, the part of the oil can splash onto the oil absorption material piece, or the part of the oil can flow onto the oil absorption material piece through the lower end surface of the needle rod, the oil absorption material piece can take away the redundant oil on the needle rod, and only a proper amount of oil is left on the needle rod at the moment, so that the lubricating requirement is just met; after the sewing machine is stationary, the lubricating oil adhered to the needle bar gradually "flows" downward with time due to the action of gravity. The lubricating oil can be firstly gathered on the lower end surfaces of the needle rod and the needle rod lower bushing to form an oil ring, and the oil absorption material piece in the technical scheme can absorb the oil ring gathered on the lower end surface of the needle rod lower bushing to prevent the lubricating oil from flowing onto the machine needle; after the machine is started next time, the lubricating oil on the oil absorption material piece can be quickly absorbed, and an effective oil-proof effect is achieved. The needle bar oil-proof device can completely absorb redundant lubricating oil as far as possible, reduces redundant lubricating oil on a needle bar of a sewing machine, improves the oil-proof effect of the needle bar, does not enable the lubricating oil to flow onto a table board along the needle bar, and enables the quality of sewing fabric to be improved; through setting up oil absorption power supply and oil absorption pipe, can in time discharge a large amount of unnecessary lubricating oil, the phenomenon that lubricating oil is detained can not appear, and the oil absorption power supply can also circulate lubricating oil, makes the lubricating oil circulation use of absorbing from oil absorption material spare, avoids extravagant lubricating oil, has reduced sewing machine's lubricated cost.

In the oil-proof device for the needle bar of the sewing machine, an oil absorption ring is sleeved on the peripheral surface of the needle bar and is close to the lower end of the lower bushing of the needle bar, the oil absorption ring is embedded with the lower bushing of the needle bar, the needle bar can move up and down in the oil absorption ring, an oil absorption groove for placing the oil absorption material piece is formed in the oil absorption ring, and the oil absorption pipe is connected to the oil absorption ring and is communicated with the oil absorption groove.

The oil absorption ring arranged in the technical scheme is sleeved on the peripheral surface of the needle rod and is embedded with the lower bushing of the needle rod, the oil absorption ring is convenient for installing the oil absorption material piece, and the leakage of lubricating oil is reduced.

In the oil-proof device for the needle bar of the sewing machine, the oil absorption ring is provided with an oil passage which inclines downwards, one end of the oil passage is communicated with the oil absorption groove in the oil absorption ring, and the other end of the oil passage extends to the peripheral surface of the oil absorption ring and is connected with an oil suction nozzle; the oil suction pipe is connected to the oil suction nozzle through an oil return hard pipe or the oil suction pipe is directly connected to the oil suction nozzle.

In the oil-proof device for the needle bar of the sewing machine, the outer peripheral surface of the lower end of the lower bushing of the needle bar is provided with the concave ring, the lower end of the lower bushing of the needle bar is inserted into the oil absorption groove of the oil absorption ring, the lower end surface of the lower bushing of the needle bar is abutted against the oil absorption material, the upper side wall of the oil absorption groove on the oil absorption ring forms the annular boss, and the boss is embedded in the concave ring.

In the oil-proof device for the needle bar of the sewing machine, the joint of the upper side wall of the concave ring and the outer peripheral surface of the lower lining of the needle bar forms a limit inclined plane, a convex ring is arranged on the lower side of the concave ring on the lower lining of the needle bar, the outer surface of the convex ring is an arc-shaped surface from the lower end surface of the lower lining of the needle bar to the concave ring, and the convex ring is embedded in an oil absorption groove of the oil absorption ring.

In the oil-proof device for the needle bar of the sewing machine, the concave ring is sleeved with the lining wire hook, the outer diameter of the convex ring is larger than the diameter of the concave ring, the lining wire hook is positioned between the limit inclined plane and the upper side surface of the oil absorption ring, and the oil absorption ring can rotate circumferentially around the lower lining of the needle bar; the inner wall of the boss is an inverted inclined plane.

The setting of the oil way passageway that inclines downwards is convenient for the drainage and derives the intra-annular lubricating oil of oil absorption, and the tip of oil suction nozzle is less than the oil groove of inhaling, can prevent lubricating oil refluence, and some oil absorption material spare can be filled in to the oil way passageway the right amount, and the oil absorption material spare of oil way passageway the inside can be as an organic whole with the oil absorption material spare in the oil groove, is favorable to increasing the oil absorption effect.

The oil suction ring is embedded on the convex ring of the lower lining of the needle rod and can move circumferentially around the convex ring, so that the installation and adjustment of the oil suction pipe are facilitated; the lining thread hook is sleeved on the concave ring and is positioned on the inclined planes of the oil suction ring and the needle rod lower lining, so that the oil suction ring can only rotate but can not move up and down, and the oil absorption of the oil-proof device of the needle rod of the sewing machine is more stable.

In the oil-proof device for the needle bar of the sewing machine, the oil suction ring and the oil suction nozzle are integrally formed. The oil absorption ring is good in integrity and convenient to disassemble and assemble.

In the oil-proof device for the needle bar of the sewing machine, as another scheme, an oil suction groove is formed in the inner wall of the lower lining of the needle bar, which is close to the end face of the lower end, the oil suction material piece is arranged in the oil suction groove, and the oil suction pipe is connected to the lower lining of the needle bar and communicated with the oil suction groove. Under the condition that the oil-proof effect of the needle bar is guaranteed, the oil-proof device of the needle bar of the sewing machine is simpler in structure and higher in practicability.

In foretell sewing machine needle bar grease proofing device, the oil absorption pipe include oil pipe one, oil pipe two and both ends respectively with the oil return rigid pipe that oil pipe one, oil pipe two link to each other, the tip cover of oil pipe one is established on the oil absorption mouth, the tip of oil pipe two with the oil absorption power supply links to each other, still be equipped with the buckle that is used for the fixed connection point on the oil absorption pipe, the lowest department of oil return rigid pipe is less than the oil outlet end of oil absorption mouth. The oil return hard pipe has higher hardness than the first oil pipe and the second oil pipe, so that the condition that the oil suction pipe prevents backflow is conveniently formed, and the buckle can prevent the connection point from loosening.

As an improvement scheme, a one-way valve can be arranged on the second oil pipe. Lubricating oil can only pass through in one way in the one-way valve, and can prevent the lubricating oil from flowing backwards.

In the oil-proof device for the needle bar of the sewing machine, the oil-absorbing material piece is wool felt or oil thread. The wool felt or the oil line has good oil absorption effect and can absorb the redundant lubricating oil between the needle rod and the lining in time.

In the oil-proof device for the needle bar of the sewing machine, the boss is conical or circular or rectangular or trapezoidal. And the oil absorption ring is matched with a convex ring at the lower end of the lower bushing of the needle rod to fix the oil absorption ring.

In the oil-proof device for the needle bar of the sewing machine, the oil absorption power source is a plunger pump, a vane pump or a gear pump. After the sewing machine is started, the oil absorption power source starts to work to provide power for recycling redundant oil on the needle rod.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model discloses well oil absorption ring, oil absorption pipe and oil absorption power supply's setting is stored, is retrieved the unnecessary lubricating oil of needle bar department, and reuse, has effectively avoided the needle bar oil leak condition, has not only improved the grease proofing effect of needle bar, has still improved the quality that sewing machine made the surface fabric.

2. The utility model discloses in improve needle bar lower liner, cooperate with the oil absorption ring, under the condition that does not influence the normal motion of needle bar, for the grease proofing guarantee that provides of needle bar.

3. The utility model discloses the setting up of well oil return rigid pipe, buckle makes grease proofing device's gas tightness better to can prevent the refluence, improved the grease proofing effect of needle bar.

4. The utility model provides a needle bar need not carry out special treatment, and the suitability is strong.

Drawings

FIG. 1 is a schematic perspective view of a needle bar oil-proof device of a sewing machine according to a first embodiment.

Fig. 2 is an exploded view of the oil suction ring mounting structure of the oil-proofing device for the needle bar of the sewing machine in the first embodiment.

Fig. 3 is a front view of the oil suction ring mounting structure and a sectional view thereof at a-a in the first embodiment.

Fig. 4 is a schematic structural view of an oil suction pipe of the oil-proof device for the needle bar of the sewing machine according to the first embodiment.

FIG. 5 is a schematic view of an oil suction power source of the oil-proof device for the needle bar of the sewing machine according to the first embodiment.

Fig. 6 is a front view of the lower hub of the needle bar in the second embodiment and a sectional view thereof at B-B.

In the figure, 1, a needle bar; 2. a needle bar lower bushing; 21. a concave ring; 22. a limiting inclined plane; 23. a convex ring; 3. an oil absorption ring; 31. an oil suction groove; 32. an oil road channel; 33. a boss; 4. an oil suction pipe; 41. an oil pipe I; 42. an oil pipe II; 43. an oil return hard pipe; 5. an oil absorption power source; 51. a lower shaft rear shaft sleeve; 52. a plunger; 52a, plunger hole; 53. a spring; 54. a spring baffle; 55. a copper oil pipe; 6. an oil absorbing material; 7. an oil suction nozzle; 8. a bushing wire hook; 9. and (5) buckling.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

The first embodiment is as follows:

as shown in fig. 1 to 3, the sewing machine includes a needle bar 1, a lower needle bar bushing 2 is sleeved at the lower end of the needle bar 1, the oil-proof device includes an oil-absorbing ring 3 and an oil-absorbing pipe 4, the oil-absorbing ring 3 is sleeved on the outer circumferential surface of the needle bar 1, the needle bar 1 can move up and down in the oil-absorbing ring 3, an oil-absorbing groove 31 is formed in the oil-absorbing ring 3, an oil-absorbing material 6 is placed on the oil-absorbing groove 31, a gap is formed between the oil-absorbing material 6 and the outer circumferential surface of the needle bar 1, the oil-absorbing material 6 is wool felt or an oil line, a boss 33 is arranged at the upper end of the inner wall of the oil-absorbing ring 3, the boss 33 is in the shape of a cone, a circle, a rectangle or a trapezoid, an oil-passage 32 inclined downward is further formed on the oil-absorbing ring 3, one end of the oil passage 32 is positioned on the oil-absorbing groove 31, an oil-absorbing nipple, the oil absorption material piece 6 in the oil passage channel 32 and the oil absorption material piece 6 in the oil absorption ring 3 can be integrated, the lower end of the needle rod lower bushing 2 is provided with a limiting inclined plane 22, a concave ring 21 and a convex ring 23 in a top-to-bottom connection mode, the diameter of the convex ring 23 is larger than that of the concave ring 21, the oil absorption ring 3 is sleeved on the convex ring 23 of the needle rod lower bushing 2, a bushing wire hook 8 is sleeved on the concave ring 21, the bushing wire hook 8 is located between the limiting inclined plane 22 and the oil absorption ring 3 and used for limiting the oil absorption ring 3 to move up and down, a boss 33 of the oil absorption ring 3 abuts against the upper end face of the convex ring 23 of the needle rod lower bushing 2, the lower end face of the needle rod lower bushing 2, namely the lower end of the convex ring 23 abuts against the oil absorption material piece 6 in the oil absorption ring 3, and the oil absorption ring 3 can rotate circumferentially on the convex ring 23.

As shown in fig. 1 and 4, the outer side wall of the oil suction nozzle 7 on the oil suction ring 3 is sleeved with an oil suction pipe 4, the oil suction pipe 4 comprises a first oil pipe 41, a second oil pipe 42 and a second oil return hard pipe 43 located between the first oil pipe 41 and the second oil pipe 42, one end of the first oil pipe 41 is sleeved at the end of the oil passage channel 32, the other end of the first oil pipe 43 is sleeved at one end of the second oil return hard pipe 43, the other end of the second oil return hard pipe 43 is sleeved with the second oil pipe 42, the end of the second oil pipe 42 is connected with the oil suction power source 5, the oil suction pipe 4 is further provided with a buckle 9 for fixing a connection point, loosening can be prevented, the air tightness of the oil suction pipe 4 is better, the lowest position of the second oil return hard pipe 43; the second oil pipe 42 can be divided into two sections, a one-way valve is arranged between the two sections, and lubricating oil in the oil return hard pipe 43 can only be output from the one-way valve in a swelling mode, so that backflow can be effectively prevented.

As shown in fig. 1 and fig. 5, the oil absorption power source 5 may be a plunger pump, a vane pump or a gear pump, and the plunger pump is taken as an example and includes a lower shaft rear axle sleeve 51, a plunger 52, a spring 53, a spring baffle 54, a copper oil pipe 55, etc.; the spring baffle 54 is fixed on the bottom plate of the machine shell, one end of the copper oil pipe 55 is fixed on the lower shaft rear shaft sleeve 51, and the other end is connected with the oil pipe II 42; the plunger 52 is arranged in a plunger hole 52a on the lower shaft rear shaft sleeve 51; the spring 53 is arranged between the plunger 52 and the spring baffle 54, and the rotation of the lower shaft drives the plunger 52 to reciprocate in the plunger hole 52a in the radial direction, so that the power for absorbing oil is provided; in addition, the plunger pump can also be designed on a lower shaft front sleeve, a lower shaft middle sleeve, an upper shaft front sleeve and the like.

Example two:

as shown in fig. 6, the present embodiment has many similarities with the first embodiment, except that the needle rod lower bushing 2 in the present embodiment is the needle rod lower bushing 2 in the first embodiment or a daily common needle rod lower bushing 2, but through widening, an oil suction groove 31 is formed on the inner wall of the needle rod lower bushing 2 near the lower end face, so that the oil suction material member 6 is located in the needle rod lower bushing 2, and the oil suction pipe is connected to the needle rod lower bushing and is communicated with the oil suction groove 31.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims (10)

1. An oil-proof device for a needle bar of a sewing machine, wherein a needle bar lower bushing (2) is sleeved on a needle bar (1) of the sewing machine, and is characterized by comprising an oil absorption material part (6) for absorbing redundant lubricating oil between the needle bar (1) and the needle bar lower bushing (2) and an oil absorption pipe (4) for discharging the lubricating oil in the oil absorption material part (6); the oil absorption material piece (6) is sleeved on the outer peripheral surface of the needle rod (1) and has a gap with the outer peripheral surface of the needle rod (1), and the oil absorption material piece (6) is positioned below the needle rod lower bushing (2) or positioned in the needle rod lower bushing (2) close to the lower end face of the needle rod lower bushing; one end of the oil suction pipe (4) is communicated to the oil suction material piece (6), and the other end of the oil suction pipe (4) is connected with an oil suction power source (5).

2. The oil-proof device for the needle bar of the sewing machine as claimed in claim 1, wherein an oil absorption ring (3) is sleeved on the outer circumferential surface of the needle bar (1), the oil absorption ring (3) is close to the lower end of the needle bar lower bushing (2), the oil absorption ring (3) is embedded with the needle bar lower bushing (2), the needle bar (1) can move up and down in the oil absorption ring (3), an oil absorption groove (31) for placing the oil absorption material piece (6) is arranged in the oil absorption ring (3), and the oil absorption pipe (4) is connected to the oil absorption ring (3) and communicated with the oil absorption groove (31).

3. The oil-proof device for the needle bar of the sewing machine according to claim 2, characterized in that the oil suction ring (3) is provided with an oil passage (32) inclining downwards, one end of the oil passage (32) is communicated with an oil suction groove (31) in the oil suction ring (3), and the other end of the oil passage (32) extends to the outer peripheral surface of the oil suction ring (3) and is connected with an oil suction nozzle (7); the oil suction pipe (4) is connected to the oil suction nozzle (7) through an oil return hard pipe (43) or the oil suction pipe (4) is directly connected to the oil suction nozzle (7).

4. The oil-proof device for the needle bar of the sewing machine according to claim 2 or 3, characterized in that the outer peripheral surface of the lower end of the needle bar lower bushing (2) is provided with a concave ring (21), the lower end of the needle bar lower bushing (2) is inserted into the oil absorption groove (31) of the oil absorption ring (3) and the lower end surface of the needle bar lower bushing (2) is abutted against the oil absorption material (6), the upper side wall of the oil absorption groove (31) on the oil absorption ring (3) forms an annular boss (33), and the boss (33) is embedded in the concave ring (21).

5. The oil proofing device for the needle bar of the sewing machine according to claim 4, characterized in that a limit inclined plane (22) is formed at the joint of the upper side wall of the concave ring (21) and the outer peripheral surface of the lower needle bar bushing (2), a convex ring (23) is arranged on the lower needle bar bushing (2) and positioned at the lower side of the concave ring (21), the outer surface of the convex ring (23) is an arc-shaped surface from the lower end surface of the lower needle bar bushing (2) to the concave ring (21), and the convex ring (23) is embedded in an oil absorption groove (31) of the oil absorption ring (3).

6. The oil proofing device for the needle bar of the sewing machine according to claim 5, characterized in that the concave ring (21) is sleeved with a bushing thread hook (8), the outer diameter of the convex ring (23) is larger than the diameter of the concave ring (21), the bushing thread hook (8) is positioned between the limit inclined plane (22) and the upper side surface of the oil absorption ring (3), and the oil absorption ring (3) can rotate around the needle bar lower bushing (2) in the circumferential direction; the inner wall of the boss (33) is an inverted inclined plane.

7. The oil-proof device for the needle bar of the sewing machine according to claim 3, wherein the oil suction pipe (4) comprises a first oil pipe (41), a second oil pipe (42) and an oil return hard pipe (43) with two ends respectively connected with the first oil pipe (41) and the second oil pipe (42), the end of the first oil pipe (41) is sleeved on the oil suction nozzle (7), the end of the second oil pipe (42) is connected with the oil suction power source (5), a buckle (9) for fixing a connecting point is further arranged on the oil suction pipe (4), and the lowest position of the oil return hard pipe (43) is lower than the oil outlet end of the oil suction nozzle (7).

8. The oil proofing device for the needle bar of the sewing machine according to claim 1, characterized in that an oil suction groove (31) is opened on the inner wall of the needle bar lower bushing (2) near the lower end face, the oil suction material piece (6) is arranged in the oil suction groove (31), and the oil suction pipe (4) is connected to the needle bar lower bushing (2) and communicated with the oil suction groove (31).

9. The oil repeller device according to claim 7, characterized in that said oil-suction ring (3) is provided integrally with said suction nozzle (7); the oil absorption material piece (6) is a wool felt or an oil line.

10. The oil proofing device for the needle bar of the sewing machine according to claim 1, characterized in that the oil suction power source (5) is a plunger pump or a vane pump or a gear pump.

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