CN112176562A

CN112176562A - Automatic oil return device of sewing machine

Info

Publication number: CN112176562A
Application number: CN202011209685.2A
Authority: CN
Inventors: 曹虎义
Original assignee: Wenzhou Susa Textile Co ltd
Current assignee: Hangzhou Meiyuan Textile Co ltd
Priority date: 2020-11-03
Filing date: 2020-11-03
Publication date: 2021-01-05
Anticipated expiration: 2040-11-03
Also published as: CN112176562B

Abstract

The invention discloses an automatic oil return device of a sewing machine, which comprises a mounting plate, an oil return unit and a limiting unit; mounting a plate: the oil tank is fixedly provided with an oil tank at the bottom of the inner side of the U-shaped fixing frame, an oil hopper is arranged at the bottom of the inner side of the oil tank, an oil discharge hopper is arranged in the middle of the surface of the inner side of the oil tank, an oil discharge pipe is arranged in the middle of one side of the U-shaped fixing frame, and one end of the oil discharge pipe penetrates through the oil tank and is connected with the bottom of the oil discharge hopper; an oil return unit: contain first motor, commentaries on classics piece, first sleeve, first oily ball that hinders, solid fixed ring, second hinder oily ball, second sleeve, inlet port and compression spring, this sewing machine's automatic oil return device can carry out the oil transportation lubrication to each oilhole of sewing machine automatically many times and ration, avoids lubricating oil to pollute sewing material, guarantees sewing material quality, can carry out impurity filtering to the lubricating oil after the circulation simultaneously.

Description

Automatic oil return device of sewing machine

Technical Field

The invention relates to the technical field of sewing machines, in particular to an automatic oil return device of a sewing machine.

Background

The sewing machine is a machine which uses one or more sewing threads to form one or more stitches on a material to be sewn and enables one or more layers of the material to be sewn to be interwoven or sewn, the sewing machine can sew fabrics such as cotton, hemp, silk, wool, rayon and the like, leather, plastics, paper and other products, the sewn stitches are neat, beautiful, smooth and firm, the sewing speed is high, the use is simple and convenient, the sewing machine needs to manually add lubricating oil to lubricate a main shaft in daily use, a proper amount of lubricating oil needs to be added into each oil hole on a machine head of the sewing machine to lubricate the whole main shaft, the operation is repeated, if the added amount of the lubricating oil is too large, the lubricating oil is easy to flow out from the gaps of the machine head to pollute the table top and the material to be sewn, and meanwhile, the lubricating oil can stick impurities on the sewing machine in the circulating process of the lubricating oil, the quality of the lubricating oil is reduced, internal parts of the sewing machine are easily damaged, and the sewing machine cannot normally run, so that the working process is influenced.

Disclosure of Invention

The invention aims to overcome the existing defects and provides an automatic oil return device of a sewing machine, which can automatically and quantitatively feed oil to each oil hole of the sewing machine for multiple times for lubrication, prevent the lubricating oil from polluting sewing materials, ensure the quality of the sewing materials, filter impurities of the circulating lubricating oil and effectively solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the automatic oil return device of the sewing machine comprises a mounting plate, an oil return unit and a limiting unit;

mounting a plate: the oil tank is fixedly provided with an oil tank at the bottom of the inner side of the U-shaped fixing frame, an oil hopper is arranged at the bottom of the inner side of the oil tank, an oil discharge hopper is arranged in the middle of the surface of the inner side of the oil tank, an oil discharge pipe is arranged in the middle of one side of the U-shaped fixing frame, and one end of the oil discharge pipe penetrates through the oil tank and is connected with the bottom of the oil discharge hopper;

an oil return unit: comprises a first motor, a rotating block, a first sleeve, a first oil blocking ball, a fixing ring, a second oil blocking ball, a second sleeve, oil inlet holes and a compression spring, wherein the second sleeve is fixedly arranged at the bottom of an oil tank, four oil inlet holes are arranged in the bottom of the second sleeve in an equidistant circumferential array manner, the first sleeve is arranged at the top of the second sleeve, the inner side of the first sleeve is in sliding connection with the outer side of the second sleeve, the second oil blocking ball is arranged between the first sleeve and the second sleeve, the fixing ring is arranged in the middle of the inner side of the first sleeve, the first oil blocking ball is arranged at the top of the fixing ring, an oil outlet pipe is arranged at the top of one side of the first sleeve and is communicated with the inside of the first sleeve, the top end of the first sleeve is a semi-sphere, the compression spring is arranged at the bottom of the first sleeve, and is movably sleeved at the outer side of the second sleeve, the first motor is fixedly arranged at the top of the oil tank, an output shaft of the first motor penetrates through the top of the oil tank and is fixedly connected with the rotating block, and the arc-shaped bulge on the rotating block is in sliding connection with the semi-sphere at the top of the first sleeve;

a limiting unit: the oil tank fixing device comprises a limiting piece, a first sliding rod, a connecting plate and a fixing block, wherein the fixing block is fixedly arranged at the bottom of the inner side of an oil tank, the upper surface of the fixing block is fixedly provided with the first sliding rod, the first sliding rod is connected with the connecting plate in a sliding manner, the other end of the connecting plate is fixedly connected with the bottom of a first sleeve, the top of the first sliding rod is fixedly provided with the limiting piece, and the limiting piece limits the connecting plate;

further, still include rose box and supporting leg, the rose box sets up the rear side at the oil tank, the bottom four corners of rose box is fixed mounting respectively has the supporting leg, the supporting leg is connected with the bottom upper surface fixed surface of U-shaped mount. Through the setting of supporting leg, carry out fixed stay to the rose box, make the inside filter equipment of rose box can the even running.

Further, still include the connecting pipe and return oil pipe, the connecting pipe sets up in the bottom of rose box, and the both ends of connecting pipe communicate with the inside of rose box and oil tank respectively, return oil pipe sets up the top at the rose box. Through the setting of returning oil pipe, make outside defeated oil pipe carry the inside filtration that filters of lubricating oil after will recycling to the rose box, return oil pipe through the rose box bottom and set up carries the lubricating oil after filtering to the oil tank in.

Further, still include the filter unit, the filter unit contains second motor, slide rail, second slide bar, threaded rod, scraper blade, connecting block and filter, second motor fixed mounting is in one side of rose box, the output shaft of second motor passes rose box and threaded rod fixed connection, threaded connection has the connecting block on the threaded rod, both ends fixed mounting respectively has the second slide bar about the connecting block, the slide rail sliding connection that spill slider on the opposite side tip of second slide bar and rose box inner wall both sides set up, the bottom of connecting block is provided with the scraper blade, the bottom of scraper blade and the laminating of the upper surface of the filter that the rose box middle part set up, the output of singlechip is connected to the input electricity of second motor. Through the operation of the second motor, the threaded rod is rotated, the second sliding rods on the two sides of the connecting block move along the sliding rail, and the scraper is moved through the connecting block to clean up the filtered impurities on the filter plate.

Further, still include secondary filter unit, secondary filter unit contains handle, rectangle filter hopper, filtration pore, small opening, secondary filter box and slotted hole, the slotted hole is seted up on the right side of filter box, and the slotted hole is located the top of filter, the outside of slotted hole is provided with secondary filter box, rectangle filter hopper sets up the middle part at secondary filter box, rectangle filter hopper's both sides respectively with the rectangular channel of seting up on the filter box lateral wall and the rectangular channel sliding connection of seting up in the secondary filter box outside, rectangle filter hopper's bottom array has the filtration pore, array such as small opening equidistance is on the lateral wall of filter box, and the small opening is located secondary filter box's inside, handle fixed mounting is on secondary filter box's outside surface. Through the setting of slotted hole, make the impurity of scraper blade on with the filter scrape to the rectangle filter hopper in, filter the lubricating oil once more through the filtration pore pair that sets up on the rectangle filter hopper, the lubricating oil after being filtered once more passes through the small opening and flows to the bottom of rose box, and after finishing filtering, filter the hopper through the pulling handle with the rectangle and take out, clears up the impurity after filtering.

The oil tank further comprises two LED lamp tubes and two observation windows, the two LED lamp tubes are fixedly installed on the inner wall of a side plate on one side of the U-shaped fixing frame at equal intervals, the observation windows are arranged on the front side of the oil tank, and the input ends of the LED lamp tubes are electrically connected with the output end of the single chip microcomputer. The staff observes the oil tank inside through the observation window, shines the oil tank through the LED fluorescent tube, makes things convenient for the staff to observe the oil mass in the oil tank.

Further, still include fixing bolt and mounting hole, the mounting hole sets up the four corners at the mounting panel respectively, be provided with fixing bolt in the mounting hole respectively. Through the arrangement of the fixing bolt and the mounting hole, the device is conveniently mounted on an operating panel of the sewing machine.

Furthermore, the oil tank fixing device further comprises two groups of L-shaped fixing rods, the two groups of L-shaped fixing rods are symmetrically arranged on the upper surface of the side plate of the U-shaped fixing frame respectively, and the other ends of the L-shaped fixing rods are fixedly connected with the outer side surface of the oil tank respectively. Through the setting of L shape dead lever, make the staff when installing the mounting panel, fix the oil tank, prevent that the oil tank from rocking.

Further, still include the oil feed funnel and advance oil pipe, advance oil pipe setting in top one side of oil tank, the other end fixed mounting who advances oil pipe has the oil feed funnel. Through the setting of oil feed funnel and oil inlet pipe, make things convenient for the staff to add lubricating oil in the oil tank.

Further, still include the singlechip, the singlechip sets up in the upper surface one side of mounting panel, the input of first motor is connected to the output electricity of singlechip, and the output of external power source is connected to the input electricity of singlechip.

Compared with the prior art, the invention has the beneficial effects that: this automatic oil return device of sewing machine has following benefit:

1. the oil return unit of the automatic oil return device of the sewing machine runs through the first motor, the rotating block rotates, the arc-shaped bulge at the bottom of the rotating block slides with the semi-sphere on the first sleeve, the first sleeve moves downwards along the second sleeve, the compression spring is compressed, the through hole at the top of the second sleeve is blocked by the second oil blocking ball, air between the first sleeve and the second sleeve moves upwards, the first oil blocking ball is lifted, when the rotating block rotates to the other end, the first sleeve is lifted by the elasticity of the compression spring, when the first sleeve is lifted, the first oil blocking ball blocks the through hole on the fixing ring, air between the second oil blocking ball and the second sleeve cannot circulate, so that lubricating oil in the oil tank moves to the inside of the second sleeve through the oil inlet hole, the first sleeve and the second sleeve act continuously, and air in the second sleeve is reduced continuously, the first sleeve is lifted to the same height each time, so that the oil discharge amount of the lubricating oil each time is the same;

2. the threaded rod is rotated through the operation of a second motor, the second sliding rods on two sides of the connecting block move along the sliding rail and move through the connecting block, the scraper plate is enabled to clean impurities filtered on the filter plate, the impurities on the filter plate are scraped into the rectangular filter hopper through the arrangement of the slotted holes, the lubricating oil is filtered again through the filter holes formed in the rectangular filter hopper, the filtered lubricating oil flows to the bottom of the filter box through the leakage holes, after the filtration is finished, the rectangular filter hopper is pulled out through pulling of a handle, the filtered impurities are cleaned, and the filtered lubricating oil is conveyed to the oil tank through an oil return pipe formed in the bottom of the filter box to be recycled;

3. the automatic oil return device of the sewing machine can automatically and quantitatively carry out oil transportation lubrication on each oil hole of the sewing machine for multiple times, prevents lubricating oil from polluting sewing materials, guarantees the quality of the sewing materials, and can carry out impurity filtration on the circulating lubricating oil.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a partial cross-sectional structure of the present invention;

FIG. 3 is a schematic cross-sectional view of the present invention;

FIG. 4 is a rear view of the present invention;

FIG. 5 is a rear view partially in section of the present invention;

FIG. 6 is an enlarged schematic view of a filter unit according to the present invention;

FIG. 7 is an enlarged schematic view of the secondary filtration unit of the present invention.

In the figure: 1 mounting plate, 2U-shaped fixing frame, 3 single chip microcomputer, 4 oil tank, 5 oil return unit, 51 first motor, 52 rotating block, 53 first sleeve, 54 first oil blocking ball, 55 fixing ring, 56 second oil blocking ball, 57 second sleeve, 58 oil inlet hole, 59 compression spring, 6 limiting unit, 61 limiting sheet, 62 first slide bar, 63 connecting plate, 64 fixing block, 7 filtering unit, 71 second motor, 72 slide rail, 73 second slide bar, 74 threaded rod, 75 scraper, 76 connecting block, 77 filtering plate, 8 secondary filtering unit, 81 handle, 82 rectangular filtering hopper, 83 filtering hole, 84 leakage hole, 85 secondary filtering box, slotted hole, 9 oil inlet funnel, 10 oil inlet pipe, 11 fixing bolt, 12L-shaped fixing rod, 13 mounting hole, 14LED lamp tube, 15 observation window, 16 oil outlet pipe, 17 oil outlet hopper, 18 filtering box, 19 connecting pipe, supporting

leg

20, 21 oil return pipe, 22 oil outlet pipe, 23 oil scoop.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: the automatic oil return device of the sewing machine comprises a mounting plate 1, an oil return unit 5 and a limiting unit 6;

mounting plate 1: the oil tank is characterized in that a U-shaped fixing frame 2 is arranged at the top of the oil tank, an oil tank 4 is fixedly arranged at the bottom of the inner side of the U-shaped fixing frame 2, an oil hopper 23 is arranged at the bottom of the inner side of the oil tank 4, an oil discharge hopper 17 is arranged in the middle of the surface of the inner side of the oil tank 4, an oil discharge pipe 16 is arranged in the middle of one side of the U-shaped fixing frame 2, and one end of the oil discharge pipe 16 penetrates through; the oil tank is characterized by further comprising a filter box 18 and supporting legs 20, wherein the filter box 18 is arranged on the rear side of the oil tank 4, the supporting legs 20 are fixedly mounted at four corners of the bottom of the filter box 18 respectively, and the supporting legs 20 are fixedly connected with the upper surface of the bottom of the U-shaped fixing frame 2. By the arrangement of the supporting legs 20, the filter box 18 is fixedly supported, so that the filter device in the filter box 18 can run stably. Still include connecting pipe 19 and time oil pipe 21, connecting pipe 19 sets up in the bottom of rose box 18, and the both ends of connecting pipe 19 communicate with the inside of rose box 18 and oil tank 4 respectively, return oil pipe 21 and set up the top at rose box 18. The oil return pipe 21 is arranged, so that the external oil pipeline conveys the lubricating oil which is recycled to the inside of the filter tank 18 for filtering, and the oil return pipe 21 arranged at the bottom of the filter tank 18 conveys the filtered lubricating oil to the oil tank 4. The filter unit 7 is further included, the filter unit 7 comprises a second motor 71, a sliding rail 72, a second sliding rod 73, a threaded rod 74, a scraping plate 75, a connecting block 76 and a filter plate 77, the second motor 71 is fixedly installed on one side of the filter box 18, an output shaft of the second motor 71 penetrates through the filter box 18 and the threaded rod 74 and is fixedly connected with the connecting block 76, the left end and the right end of the connecting block 76 are respectively and fixedly provided with the second sliding rod 73, a concave sliding block on the end portion of the other side of the second sliding rod 73 is in sliding connection with the sliding rails 72 arranged on two sides of the inner wall of the filter box 18, the scraping plate 75 is arranged at the bottom of the connecting block 76, the bottom of the scraping plate 75 is attached to the upper surface of the filter plate 77 arranged in the middle of. The second motor 71 operates to rotate the threaded rod 74, so that the second sliding rods 73 on the two sides of the connecting block 76 move along the sliding rails 72, and the scraper 75 cleans impurities filtered on the filter plate 77 by moving through the connecting block 76. The secondary filter unit 8 is further included, the secondary filter unit 8 comprises a handle 81, a rectangular filter hopper 82, filter holes 83, leak holes 84, a secondary filter box 85 and a slotted hole 86, the slotted hole 86 is formed in the right side of the filter box 18, the slotted hole 86 is located at the top of the filter plate 77, the secondary filter box 85 is arranged on the outer side of the slotted hole 86, the rectangular filter hopper 82 is arranged in the middle of the secondary filter box 85, two sides of the rectangular filter hopper 82 are respectively in sliding connection with a rectangular groove formed in the side wall of the filter box 18 and a rectangular groove formed in the outer side of the secondary filter box 85, the filter holes 83 are arrayed at the bottom of the rectangular filter hopper 82, the leak holes 84 are arrayed on the side wall of the filter box 18 at equal intervals, the leak holes 84 are located in the secondary filter box 85, and the handle 81 is fixedly installed on the outer side surface of. Through the setting of slotted hole 86, make scraper blade 75 scrape the impurity on the filter 77 to in the rectangle filter hopper 82, filter lubricating oil once more through the filtration hole 83 that sets up on the rectangle filter hopper 82, the lubricating oil after being filtered once more flows to the bottom of rose box 18 through weeping hole 84, and after finishing filtering, take out rectangle filter hopper 82 through pulling handle 81, clear up the impurity after filtering. The LED lamp tube comprises a U-shaped fixing frame 2 and is characterized by further comprising two LED lamp tubes 14 and two observation windows 15, the two LED lamp tubes 14 are fixedly installed on the inner wall of a side plate on one side of the U-shaped fixing frame 2 at equal intervals, the observation windows 15 are arranged on the front side of the oil tank 4, and the input end of each LED lamp tube 14 is electrically connected with the output end of the single chip microcomputer 3. The staff observes 4 insides through observation window 15 to the oil tank, shines oil tank 4 through LED fluorescent tube 14, makes things convenient for the staff to observe the oil mass in the oil tank 4. Still include fixing bolt 11 and mounting hole 13, mounting hole 13 sets up the four corners at mounting panel 1 respectively, is provided with fixing bolt 11 in the mounting hole 13 respectively. The device is convenient to be installed on an operation plate of the sewing machine through the arrangement of the fixing bolt 11 and the installation hole 13. The oil tank fixing device is characterized by further comprising two groups of L-shaped fixing rods 12, wherein the two groups of L-shaped fixing rods 12 are symmetrically arranged on the upper surface of the side plate of the U-shaped fixing frame 2 respectively, and the other ends of the L-shaped fixing rods 12 are fixedly connected with the outer side surface of the oil tank 4 respectively. Through the setting of L shape dead lever 12, make the staff when installing mounting panel 1, fix oil tank 4, prevent that oil tank 4 from rocking. The oil inlet device further comprises an oil inlet funnel 9 and an oil inlet pipe 10, wherein the oil inlet pipe 10 is arranged on one side of the top of the oil tank 4, and the other end of the oil inlet pipe 10 is fixedly provided with the oil inlet funnel 9. Through the arrangement of the oil inlet funnel 9 and the oil inlet pipe 10, the lubricating oil can be conveniently added into the oil tank 4 by workers;

an oil return unit 5: comprises a first motor 51, a rotating block 52, a first sleeve 53, a first oil-blocking ball 54, a fixing ring 55, a second oil-blocking ball 56, a second sleeve 57, oil inlet holes 58 and a compression spring 59, wherein the second sleeve 57 is fixedly arranged at the bottom of the oil tank 4, four oil inlet holes 58 are circumferentially arrayed at equal intervals at the bottom of the second sleeve 57, the first sleeve 53 is arranged at the top of the second sleeve 57, the inner side of the first sleeve 53 is in sliding connection with the outer side of the second sleeve 57, the second oil-blocking ball 56 is arranged between the first sleeve 53 and the second sleeve 57, the fixing ring 55 is arranged at the middle part of the inner side of the first sleeve 53, the first oil-blocking ball 54 is arranged at the top of the fixing ring 55, the oil outlet pipe 22 is arranged at the top of one side of the first sleeve 53, the oil outlet pipe 22 is communicated with the inside of the first sleeve 53, the top end of the first sleeve 53 is a semi-sphere, the compression spring 59 is arranged at the bottom of the first sleeve 53, the compression, the first motor 51 is fixedly arranged at the top of the oil tank 4, an output shaft of the first motor 51 penetrates through the top of the oil tank 4 to be fixedly connected with the rotating block 52, and the arc-shaped bulge on the rotating block 52 is in sliding connection with the semi-sphere at the top of the first sleeve 53;

the limiting unit 6: the oil tank fixing device comprises a limiting piece 61, a first sliding rod 62, a connecting plate 63 and a fixing block 64, wherein the fixing block 64 is fixedly installed at the bottom of the inner side of the oil tank 4, the first sliding rod 62 is fixedly installed on the upper surface of the fixing block 64, the connecting plate 63 is connected onto the first sliding rod 62 in a sliding mode, the other end of the connecting plate 63 is fixedly connected with the bottom of the first sleeve 53, the limiting piece 61 is fixedly installed at the top of the first sliding rod 62, and the connecting plate 63 is limited by the limiting piece 61;

wherein: still include singlechip 3, singlechip 3 sets up in the upper surface one side of mounting panel 1, and the input of first motor 51 is connected to singlechip 3's output electricity, and external power source's output is connected to singlechip 3's input electricity.

When in use: a worker uses an external wrench to enable a fixing bolt 11 to penetrate through a mounting hole 13 on a mounting plate 1, the device is mounted at a proper position of an operating plate of a sewing machine, then lubricating oil is conveyed into an oil tank 4 through an oil inlet funnel 9 on an oil inlet pipe 10, a first motor 51 is controlled to be started through a single chip microcomputer 3, a rotating block 52 is rotated through the operation of the first motor 51, an arc-shaped bulge at the bottom of the rotating block 52 slides with a semi-sphere on a first sleeve 53, the first sleeve 53 moves downwards along a second sleeve 57, a compression spring 59 is compressed, a through hole at the top of the second sleeve 57 is blocked through a second oil blocking ball 56, air between the first sleeve 53 and the second sleeve 57 moves upwards, the first oil blocking ball 54 is lifted, when the rotating block 52 rotates to the other end, the first sleeve 53 is lifted through the elasticity of the compression spring 59, and when the first sleeve 53 is lifted, the first oil blocking ball 54 blocks the through hole on the fixing ring 55, so that the air between the second oil blocking ball 56 and the second sleeve 57 cannot circulate, the lubricating oil in the oil tank 4 moves to the inside of the second sleeve 57 through the oil inlet hole 58, the air in the second sleeve 57 is continuously reduced through the continuous action of the first sleeve 53 and the second sleeve 57, the lubricating oil is discharged into the oil discharge hopper 17 through the oil outlet pipe 22, the lubricating oil is conveyed to each oil hole of the sewing machine through the connection of the oil discharge pipe 16 and an external oil conveying pipe, the connecting plate 63 is limited through the limiting sheet 61, the heights of the first sleeve 53 in each lifting are the same, the oil discharge amount of the lubricating oil in each lifting is the same, after the lubricating oil is recycled, the external oil conveying pipe conveys the recycled lubricating oil to the inside of the filter tank 18 for filtering, and the lubricating oil is operated through the second motor 71, the threaded rod 74 is rotated, the second sliding rods 73 on two sides of the connecting block 76 move along the sliding rails 72, the connecting block 76 moves, the scraper 75 cleans impurities on the filter plate 77, the impurities on the filter plate 77 are scraped into the rectangular filter hopper 82 through the scraper 75, the lubricating oil is filtered again through the filter holes 83 formed in the rectangular filter hopper 82, the lubricating oil filtered again flows to the bottom of the filter box 18 through the leakage holes 84, after filtering is finished, the rectangular filter hopper 82 is drawn out through the pulling handle 81, the filtered impurities are cleaned, and the filtered lubricating oil is conveyed to the oil tank 4 through the oil return pipe 21 formed in the bottom of the filter box 18 for recycling.

It should be noted that, in this embodiment, the specific model of the single chip microcomputer 3 is siemens S7-1200, the first motor 51 and the second motor 71 are suggested to be micro servo motors manufactured by noon electric south kyo limited, the LED lamp 14 is suggested to be an LED lamp manufactured by guangdong kusein electric appliance technology limited, and the single chip microcomputer 3 controls the first motor 51, the second motor 71 and the LED lamp 14 to work by a method commonly used in the prior art.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Automatic oil return device of sewing machine, its characterized in that: comprises a mounting plate (1), an oil return unit (5) and a limiting unit (6);

mounting plate (1): the oil tank is characterized in that a U-shaped fixing frame (2) is arranged at the top of the oil tank, an oil tank (4) is fixedly arranged at the bottom of the inner side of the U-shaped fixing frame (2), an oil hopper (23) is arranged at the bottom of the inner side of the oil tank (4), an oil discharge hopper (17) is arranged in the middle of the surface of the inner side of the oil tank (4), an oil discharge pipe (16) is arranged in the middle of one side of the U-shaped fixing frame (2), and one end of the oil discharge pipe (16) penetrates through the oil tank (4) to be;

oil return unit (5): the oil-saving oil pump comprises a first motor (51), a rotating block (52), a first sleeve (53), a first oil-blocking ball (54), a fixing ring (55), a second oil-blocking ball (56), a second sleeve (57), oil inlet holes (58) and a compression spring (59), wherein the second sleeve (57) is fixedly arranged at the bottom of an oil tank (4), four oil inlet holes (58) are circumferentially arrayed at equal intervals at the bottom of the second sleeve (57), the first sleeve (53) is arranged at the top of the second sleeve (57), the inner side of the first sleeve (53) is in sliding connection with the outer side of the second sleeve (57), the second oil-blocking ball (56) is arranged between the first sleeve (53) and the second sleeve (57), the fixing ring (55) is arranged in the middle of the inner side of the first sleeve (53), the first oil-blocking ball (54) is arranged at the top of the fixing ring (55), an oil outlet pipe (22) is arranged at the top of one side of the first sleeve (53), the oil outlet pipe (22) is communicated with the inside of a first sleeve (53), the top end of the first sleeve (53) is a semi-sphere, a compression spring (59) is arranged at the bottom of the first sleeve (53), the compression spring (59) is movably sleeved on the outer side of a second sleeve (57), a first motor (51) is fixedly installed at the top of the oil tank (4), an output shaft of the first motor (51) penetrates through the top of the oil tank (4) to be fixedly connected with a rotating block (52), and an arc-shaped bulge on the rotating block (52) is in sliding connection with the semi-sphere at the top of the first sleeve (53);

limiting unit (6): contain spacing piece (61), first slide bar (62), connecting plate (63) and fixed block (64), fixed block (64) fixed mounting is in the inboard bottom of oil tank (4), the last fixed surface of fixed block (64) installs first slide bar (62), sliding connection has connecting plate (63) on first slide bar (62), the other end of connecting plate (63) and the bottom fixed connection of first sleeve (53), the top fixed mounting of first slide bar (62) has spacing piece (61), spacing piece (61) are spacing to connecting plate (63).

2. The automatic oil return device of the sewing machine according to claim 1, characterized in that: still include rose box (18) and supporting leg (20), rose box (18) set up the rear side at oil tank (4), the bottom four corners of rose box (18) fixed mounting respectively has supporting leg (20), supporting leg (20) are connected with the bottom upper surface fixed of U-shaped mount (2).

3. The automatic oil return device of the sewing machine according to claim 2, characterized in that: still include connecting pipe (19) and time oil pipe (21), connecting pipe (19) set up in the bottom of rose box (18), and the both ends of connecting pipe (19) communicate with the inside of rose box (18) and oil tank (4) respectively, time oil pipe (21) sets up the top at rose box (18).

4. The automatic oil return device of the sewing machine according to claim 2, characterized in that: the filter unit (7) comprises a second motor (71), a sliding rail (72), a second sliding rod (73), a threaded rod (74), a scraper (75), a connecting block (76) and a filtering plate (77), wherein the second motor (71) is fixedly installed on one side of the filtering box (18), an output shaft of the second motor (71) penetrates through the filtering box (18) and is fixedly connected with the threaded rod (74), the threaded rod (74) is connected with the connecting block (76) in a threaded manner, the left end and the right end of the connecting block (76) are respectively and fixedly provided with the second sliding rod (73), a concave sliding block on the end part of the other side of the second sliding rod (73) is in sliding connection with the sliding rail (72) arranged on two sides of the inner wall of the filtering box (18), the scraper (75) is arranged at the bottom of the connecting block (76), and the upper surface of the filtering plate (77) arranged in the middle of the filtering box (18) is attached to the bottom, the input end of the second motor (71) is electrically connected with the output end of the singlechip (3).

5. The automatic oil return device of the sewing machine according to claim 2, characterized in that: the novel filter is characterized by further comprising a secondary filtering unit (8), wherein the secondary filtering unit (8) comprises a handle (81), a rectangular filtering hopper (82), filtering holes (83), leaking holes (84), a secondary filtering box (85) and slotted holes (86), the slotted holes (86) are formed in the right side of the filtering box (18), the slotted holes (86) are located at the top of the filtering plate (77), the secondary filtering box (85) is arranged on the outer side of the slotted holes (86), the rectangular filtering hopper (82) is arranged in the middle of the secondary filtering box (85), two sides of the rectangular filtering hopper (82) are respectively in sliding connection with the rectangular grooves formed in the side wall of the filtering box (18) and the rectangular grooves formed in the outer side of the secondary filtering box (85), the filtering holes (83) are arrayed at the bottom of the rectangular filtering hopper (82), the leaking holes (84) are arrayed on the side wall of the filtering box (18) at equal intervals, and the leaking holes (84) are located in the secondary filtering box (85), the handle (81) is fixedly arranged on the outer side surface of the secondary filter box (85).

6. The automatic oil return device of the sewing machine according to claim 1, characterized in that: the LED lamp tube fixing device is characterized by further comprising two LED lamp tubes (14) and two observation windows (15), wherein the two LED lamp tubes (14) are fixedly installed on the inner wall of a side plate of the U-shaped fixing frame (2) at equal intervals respectively, the observation windows (15) are arranged on the front side of the oil tank (4), and the input end of each LED lamp tube (14) is electrically connected with the output end of the single chip microcomputer (3).

7. The automatic oil return device of the sewing machine according to claim 1, characterized in that: still include fixing bolt (11) and mounting hole (13), mounting hole (13) set up the four corners in mounting panel (1) respectively, be provided with fixing bolt (11) in mounting hole (13) respectively.

8. The automatic oil return device of the sewing machine according to claim 1, characterized in that: the oil tank is characterized by further comprising two groups of L-shaped fixing rods (12), wherein the two groups of L-shaped fixing rods (12) are symmetrically arranged on the upper surface of the side plate of the U-shaped fixing frame (2), and the other ends of the L-shaped fixing rods (12) are fixedly connected with the outer side surface of the oil tank (4) respectively.

9. The automatic oil return device of the sewing machine according to claim 1, characterized in that: the oil inlet device is characterized by further comprising an oil inlet funnel (9) and an oil inlet pipe (10), wherein the oil inlet pipe (10) is arranged on one side of the top of the oil tank (4), and the other end of the oil inlet pipe (10) is fixedly provided with the oil inlet funnel (9).

10. The automatic oil return device of the sewing machine according to claim 1, characterized in that: wherein: still include singlechip (3), singlechip (3) set up in upper surface one side of mounting panel (1), the input of first motor (51) is connected to the output electricity of singlechip (3), and external power source's output is connected to the input electricity of singlechip (3).