213results about "Lubrication/cooling devices" patented technology

The utility model belongs to the technical field of sewing machines, and particularly relates to a button sewing machine which comprises a thread trimming driving rod, a thread trimming fork opening pushed by a cam is formed in the upper end of the thread trimming driving rod, and the lower end of the thread trimming driving rod is connected with a thread trimming connecting rod assembly. The middle end of the lifting and pressing lever is rotatably arranged in the machine body, a pushing part for pushing the cam is formed at one end of the lifting and pressing lever, the other end of the lifting and pressing lever is connected with a lifting and pressing foot assembly, and a first thread loosening part is formed on the lifting and pressing lever; a thread loosening fork opening for a first thread loosening part to push is formed in the lower end of the thread loosening driving rod, the upper end of the thread loosening driving rod is connected with a thread loosening assembly, and in the rotating process of the cam, one side of the thread shearing fork opening is firstly pushed, so that the thread shearing action is executed through the thread shearing connecting rod assembly, then the lifting and pressing lever is pushed, and the presser foot lifting action is executed through the presser foot lifting assembly. The thread trimming and presser foot lifting procedures are completed in sequence.

The utility model relates to a machine head integrated cutter structure which comprises a machine shell and a mounting shell integrally formed on the machine shell, a first cavity and a second cavity are formed in the mounting shell, a sliding rod and a driving structure for driving the sliding rod to vertically slide are arranged on the first cavity in a sliding mode, and the top end of the sliding rod is located in the first cavity; the bottom end of the sliding rod downwards penetrates through the first cavity, and the cutter is installed at the bottom of the sliding rod. The driving structure comprises a motor, a sliding spring and a cam; the cam is rotationally connected to the inner wall of the first cavity, the axis of the cam is transverse, and the motor drives the cam to rotate; a sliding block is arranged at the top end of the sliding rod, the sliding spring is located between the sliding block and the inner wall of the first cavity and jacks up the sliding block, and the cam rotates to press the sliding block downwards to enable the cutter to cut the line. The second cavity is used for installing the presser foot mechanism and communicates with the first cavity, and the sliding rod is connected to the first cavity in a sealed and sliding mode. The cutter structure has the effect that the cutter structure is more convenient to lubricate.

The utility model discloses a machine needle cooling device for a computerized sewing machine, which comprises a computerized sewing machine head, a water tank is arranged at the computerized sewing machine head, and a coil pipe is arranged in the water tank; the top end of the coil pipe is connected with an air inlet pipe which is connected with an external air pump, and the bottom end of the coil pipe penetrates through the bottom of the water tank and is provided with a connector for connecting an air blowing pipe; the air outlet end of the air blowing pipe is aligned with a machine needle of the machine head of the computerized sewing machine. On the basis of an original computer sewing machine, the blowing cooling device is additionally arranged to cool the machine needle, the machine needle cannot be heated to cause color overflow of threads during sewing, and the appearance of a product meets the effect required by a client.

The utility model relates to a double-shaft motor oil supply mechanism for a sewing machine and the sewing machine, and the double-shaft motor oil supply mechanism for the sewing machine comprises a double-shaft motor assembly which comprises a first output shaft and a second output shaft; the oil supply assembly is matched with the first output shaft; and the stitch length adjusting assembly is matched with the second output shaft. According to the technical scheme, the problem that in the prior art, lubricating oil conveying of a sewing machine is not stable is effectively solved.

Lubricating oil is prevented from being attached to parts which do not need the lubricating oil in the sewing machine. The sewing machine includes a sewing machine motor; a needle plate; a lower shaft disposed below the needle plate and rotated by power generated by a sewing machine motor; a conversion member which is fixed to the lower shaft and converts the rotational motion of the lower shaft into a swinging motion; a holding member that holds at least a portion of the conversion member; an oil supply port for supplying lubricating oil between the conversion member and the holding member; and a first cover disposed on at least a portion of the periphery of the conversion member, the size of the first cover being smaller than the size of the lower shaft in the axial direction of the lower shaft.

The utility model discloses a closed needle bar oil-proof structure and a sewing machine in the technical field of sewing machines. The closed needle bar oil-proof structure comprises a machine shell. The lower lining is installed on the machine shell, and a grease storage groove is formed in the inner circumferential face of the lower lining; the needle rod can be arranged in the lower lining in a penetrating mode in an axial moving mode, and the radial size of the grease storage groove is larger than that of the needle rod; the upper oil seal is arranged on the lower bush in a sleeving mode, the bottom end of the upper oil seal is fixedly connected with the top end of the lower bush, and the top end of the upper oil seal is connected with the needle rod in a sealed mode; the lower oil seal is arranged on the lower lining in a sleeved mode, the top end of the lower oil seal is fixedly connected with the bottom end of the lower lining, and the bottom end of the lower oil seal is connected with the needle rod in a sealed mode. The needle rod lubricating device not only plays a role in lubricating the needle rod, but also can prevent lubricating oil in the machine head from seeping out, has the effects of preventing thread clamping and dust, and has the advantages of being simple in structure and convenient to install and maintain.

A quantitative oil supply control method for a rotating shuttle comprises the steps that firstly, the interval of the machine rotating speed of a sewing machine is divided into N equal parts, namely N intervals, the oil supply capacity corresponding to the nth interval is An, and the lubricating oil demand quantity of the rotating shuttle is Fn; 2, the working time of the rotating speed of the machine in N intervals is recorded or extracted through electric control of the sewing machine, the time corresponding to the nth interval is the oil supply time of an on-off valve and recorded as Tn, and the non-oil supply time of an electromagnetic valve is recorded as Un; thirdly, the oil supply amount is set to be K at a time; when K meets different conditions, the on-off valve stops or starts oil supply; a quantitative oil supply control system for a rotating shuttle comprises an oil pump, a first oil supply pipe, a second oil supply pipe, an oil return pipe and an oil pan, an electromagnetic valve is arranged between the first oil supply pipe and the second oil supply pipe, and the electromagnetic valve is connected with a sewing machine electric controller and a control panel. The control panel is provided with at least three-gear buttons corresponding to the oil quantity required by electric control of the sewing machine, and the electric control of the sewing machine correspondingly controls the on-off flow of the electromagnetic valve.

The utility model provides a single direct drive sewing machine structure, which comprises a sewing machine body and a bedplate, the sewing machine body is fixed on the bedplate, the outer wall of the sewing machine body is provided with a heat dissipation hole, a support rod is fixedly connected in the heat dissipation hole, the support rod is rotatably connected with a fan blade, and the fan blade is fixed on the bedplate. The heat dissipation holes are connected with a dust cover through a positioning structure, and the fan blades are located in the dust cover, so that the purpose of heat dissipation of the sewing machine body by the swan is achieved, and the sewing machine body can operate for a long time.

The utility model relates to an outer shuttle, a rotating shuttle and a sewing machine, the outer shuttle comprises a base structure, the base structure is provided with a rotating shuttle shaft mounting hole, a lubricating oil containing space and a lubricating oil communication channel, and the lubricating oil communication channel is communicated with the lubricating oil containing space and the exterior of the base structure; the moon ring structure is arranged on the base structure and extends towards one side far away from the rotating shuttle shaft; an outlet of the lubricating oil communicating channel is located in the side, away from the rotating shuttle shaft, of the base structure and located in the moon ring structure. According to the technical scheme, the problem that in the prior art, the service cycle of a rotating shuttle is short is effectively solved.

The utility model discloses a sewing mechanism and a sewing machine, and relates to the technical field of sewing machines. The needle comprises a needle rod and a cold air piece which are both arranged on the sewing machine, an air inlet cavity is formed in the needle rod, the cold air piece is communicated with the air inlet cavity and used for conveying cold air into the needle rod, a machine needle is arranged on the needle rod, a thread hole and an air inlet hole which are communicated are formed in the machine needle, and the air inlet hole is communicated with the air inlet cavity. A traditional heat dissipation mode is abandoned, during use, cold air is conveyed into the air inlet cavity through the cold air piece, then the cold air enters the air inlet hole and is exhausted through the thread hole, when the cold air circulates in the air inlet hole, the temperature of a machine needle can be reduced from inside to outside, the cooling effect is achieved, sewing threads are prevented from being burnt out, the sewing quality is guaranteed, and the use environment is clean; therefore, the practicability is higher.

The utility model discloses a heat dissipation device for a sewing machine, and relates to the technical field of sewing machines, the heat dissipation device comprises a sewing machine head and a U-shaped dust screen, one side of the interior of the sewing machine head is provided with a main machine, the outer wall of the sewing machine head is provided with a U-shaped opening corresponding to the main machine, the U-shaped dust screen is fixedly arranged in the U-shaped opening, and the U-shaped dust screen is fixedly arranged in the main machine. The outer side of the U-shaped dustproof net is sleeved with a U-shaped plate, a motor is arranged in the sewing machine head and located on the lower side of the main machine, the two sides of the motor are fixedly connected with the inner wall of the sewing machine head through supporting rods, the output end of the motor is fixedly sleeved with fan blades, and a vertical rod is fixedly arranged on the inner side of the upper end of the U-shaped plate. The lower end of the vertical rod extends into the sewing machine head, and a power supply mechanism for supplying power to the motor is arranged at the lower end of the vertical rod. After the dustproof device is used, the machine head of the sewing machine can be well prevented from dust, and dust is prevented from entering the machine head of the sewing machine as much as possible when the dustproof device is idle.

The invention discloses a shuttle assembly lubricating and cooling device and sewing equipment, the shuttle assembly lubricating and cooling device comprises a shuttle race, the shuttle race is provided with a containing cavity, the shuttle race on the periphery of the containing cavity is provided with an air storage cavity, and the shuttle race is further provided with an air blowing hole communicating with the containing cavity and the air storage cavity; the shuttle swings back and forth in the containing cavity, an area in sliding contact with the periphery of the shuttle is arranged on the inner wall of the containing cavity, and the ends, away from the air storage cavity, of the air blowing holes are distributed in the area; and the gas supply mechanism communicates with the gas storage cavity and is used for providing gas with preset pressure for the gas storage cavity. The contact surface of the shuttle and the shuttle race is cooled through the air storage cavity and the blowing holes, the temperature of the shuttle is reduced, the service life of the shuttle is prolonged, and the working efficiency is guaranteed.

This utility model relates to the field of chain stitch machine technology and discloses a twelve-needle needle bar holder for a multi-needle chain stitch machine. It includes a needle bar holder with a uniformly distributed applicator connected and fixedly connected through the center. The applicator has a perforation in the center, and pipes are located on both sides of the applicator at the center of the needle bar holder. A flexible tube is fixedly connected to the left side of the needle bar holder, and an oil bottle is located at the top left side of the needle bar holder. A placement seat is provided through the outer wall of the oil bottle, and a connecting rod is fixedly connected to the right side of the placement seat. A fixing component is located at the top left side of the needle bar holder. In this utility model, the applicator absorbs lubricating oil, and the capillary force between the micropores of the applicator adsorbs the grease into the pores, achieving oil storage. When the needle bar moves, slight friction with the material surface breaks the surface tension of the grease locally, causing the grease to slowly seep out along the pore channels to the contact interface for application.

The utility model relates to the technical field of machine needle cooling, in particular to a machine needle cooling device which comprises a sewing machine connecting plate, a high-pressure gas box, a gas control box, an electromagnetic valve, a two-stage cooling cavity, a spoiler, a temperature sensor and an airflow spray head. The needle is rapidly cooled through high-speed air flow in the first-stage cooling cavity, when the temperature of the needle is reduced to a preset value, mild cooling is achieved through low-speed air flow regulated and controlled by the second-stage cooling cavity and the spoiler in the second-stage cooling cavity, finally, the air flow is evenly sprayed to the surface of the needle through the air flow spray head, and the temperature sensor monitors the temperature of the needle in real time. And data are fed back to a control system, so that automatic adjustment in the cooling process is realized, the needle cooling device can quickly reduce the temperature of the needle, the high-temperature acting time is shortened, and thermal stress and needle deformation caused by overlarge temperature difference can be avoided.

The utility model relates to the technical field of oil pump equipment, and provides an oil pump which comprises a pump body, a shaft hole of the pump body is connected with an installation ring and forms an oil way gap, and the oil way gap is communicated with a piston hole and an oil pumping hole which are formed in the shaft body of the pump body. The oil way gap is communicated with a small oil injection pipe, and the small oil injection pipe is further communicated with an impeller chamber of the pump body. By means of the piston hole, the oil pumping hole and the oil outlet hole, oil in the two pipelines can be converged at the position of the small oil injection pipe by sharing the small oil injection pipe, the oil supply pressure of each pipeline can be changed, uniform and stable oil pressure can be formed, and therefore the oil supply efficiency is improved.

The utility model relates to the technical field of sewing machine lubrication, and discloses a sewing machine lubrication mechanism which comprises a machine head and a mounting plate arranged on the machine head, a lubrication cylinder is arranged on the mounting plate, a lubrication cavity is arranged in the lubrication cylinder, one end of the lubrication cavity is open, the lubrication cavity is used for storing lubricating oil, and an insertion cylinder extending into an oil hole is arranged on the lower end face of the lubrication cylinder. A slidable push plate is further arranged in the lubricating cavity, a push rod with one end extending out of the lubricating cavity is arranged on the push plate, a limiting assembly used for limiting movement of the push rod is arranged on the mounting plate, and a dismounting and mounting assembly used for dismounting and mounting the lubricating cylinder on the mounting plate is further arranged on the mounting plate. By means of the structure, movement of the push rod is limited through the limiting assembly, lubricating oil pushed into the oil hole by the push plate is quantitative, and therefore the situation that when the lubricating oil is injected into the oil hole, the lubricating oil injected into the oil hole is too much or too little, and the actual using effect is affected can be avoided.

The application discloses a plush toy sewing tool and relates to the sewing field.The tool comprises a workbench, a needle plate hole is formed in the workbench, a cavity is formed in the workbench and communicates with the needle plate hole, a guide piece is fixedly arranged on the workbench and is provided with a guide hole, two first accommodating holes are formed in the guide piece, a sliding rod is provided with a through hole penetrating along the axial direction of the sliding rod, two second accommodating holes are formed in the outer surface of the sliding rod along the axial direction of the sliding rod, one first accommodating hole and one second accommodating hole communicate with each other, the second accommodating holes and the through hole communicate with each other, the sliding rod is slidingly arranged in the guide hole, the two ends of a needle are provided with needle defects, the needle is rotationally arranged on the sliding rod, one end of the needle penetrates through the first accommodating hole and the second accommodating hole in sequence and is arranged in the through hole, a driving piece is used for driving the sliding rod to make directional reciprocating motion, a water cooling circulation system is arranged in the guide piece, and a rotating shuttle is arranged in the cavity.

The utility model relates to the technical field of sewing machines, in particular to a needle bar oil-proof structure and a sewing machine with the needle bar oil-proof structure. The needle bar oil-proof structure is applied to the sewing machine and comprises a machine shell, a needle bar assembly and an oil seal seat, the needle bar assembly is connected with the machine shell, the oil seal seat is detachably connected to the machine shell or the needle bar assembly, an oil seal is detachably connected to the oil seal seat, and the needle bar assembly is arranged in the oil seal in a penetrating mode and can axially move relative to the oil seal seat. Therefore, due to the fact that the oil seal seat is detachably connected with the machine shell or the needle rod assembly, the oil seal and the oil seal seat can be detached together, when the oil seal needs to be replaced, the oil seal seat enables installation of the oil seal to be simpler and more standard, special tools are not needed for disassembly and assembly, installation difficulty is reduced, downtime is shortened, and maintenance cost is reduced. In addition, the oil seal seat provides an additional protection layer for the oil seal, the possibility that external impurities (such as dust and particulate matter) enter a sealing area is reduced, and the oil seal is prevented from being damaged too early.

The utility model discloses a dustproof deashing support of a looping machine, which comprises a support column, the side surface of the support column is connected with a casing of the looping machine through a pull rod, a purification bin is mounted on the side surface of the support column through a positioning support, a filter element is mounted in the purification bin, and a mounting seat at the top of the filter element is fixed on the purification bin through a connecting mechanism. A spray head is arranged on the side face of the filter element, the spray head is connected with a water pump and a water tank through hoses, an air outlet of the purification bin is connected with the filter bin through an exhaust pipe, and a fan is installed at the air outlet of the filter bin. The oil collecting device for the looping machine is scientific and reasonable in structural design, the oil collecting funnel is arranged below the looping machine shell, dripping oil liquid generated in the machining process of looping machine equipment can be collected, the filter element is arranged in the purification bin, and the oil collecting funnel is arranged in the purification bin. The filter element can adsorb fine particles in the waste gas through the infiltration liquid uniformly distributed in the filter element while intercepting dust in the waste gas, so that the adsorption and filtering effects of the filter element are improved.

The present invention relates to a weaving machine 100 comprising a base 1, configured to support a fabric, an upper arm 2, facing the base 1 and arranged at a predetermined vertical height with respect to the base 1. The weaving machine 100 further comprises an inner chamber comprising an upper portion, at least partially defined by the upper arm 2, and a lower portion, at least partially defined by the base 1, and a working assembly 200, operating between the base 1 and the upper arm 2, configured to carry out a processing of the fabric, at least partially mounted within the upper and lower portion. The weaving machine 100 also comprises a lubrication assembly for dispersing the lubricating liquid within the lower portion of the inner chamber. In greater detail, the lubrication assembly is arranged within the lower portion and the upper portion is fluid-dynamically separated from the lower portion.

The utility model belongs to the technical field of template machines, and relates to a circulating type oil bin device of a template machine, which comprises a rotating shuttle seat and a rotating shuttle shaft, an oil bin is arranged in the rotating shuttle seat, a plunger pump is sleeved on the rotating shuttle shaft, the oil bin comprises a first oil bin, a second oil bin and a third oil bin which are sequentially arranged from top to bottom and are communicated, and the first oil bin, the second oil bin and the third oil bin are communicated with each other. The third oil bin comprises an upper-layer bin body and a lower-layer bin body, the upper-layer bin body is connected with an oil return nozzle of the plunger pump through an oil return pipe, and the lower-layer bin body is connected with an oil inlet nozzle of the plunger pump through an oil inlet pipe; rotating shuttle oil purification structures are respectively arranged between the upper-layer bin bodies of the first oil bin and the second oil bin, between the second oil bin and the third oil bin, and between the upper-layer bin body and the lower-layer bin body of the third oil bin. According to the circulating type oil bin device of the template machine, through the multi-stage oil bin structure and the multi-stage purification structure, rotating shuttle oil can be circularly purified, and frequent replacement is not needed any more.

The utility model provides an oil supply mechanism of a sewing machine, which belongs to the technical field of sewing machine lubrication and comprises a mounting seat, a sewing machine shell fixedly mounted on the surface of the mounting seat, a sewing machine spindle movably mounted in an inner cavity of the sewing machine shell and a transmission gear sleeved on the outer surface of the sewing machine spindle. The oil supply assembly is arranged in an inner cavity of the sewing machine shell. The oil pumping component and the auxiliary component are matched with each other, an efficient lubricating process is completed, the transmission gear is meshed with the bevel gear so that the sewing machine spindle can rotate to drive the oil pumping component, and then lubricating oil in the oil groove is pumped into the fixing shell through the oil pumping pipe. And then the oil is uniformly sprayed to the main shaft piece and the auxiliary shaft piece through the nozzle, so that automatic lubrication of the interior of the sewing machine is realized, the lubrication efficiency is improved, the service life of equipment is prolonged, and the maintenance cost and the operation complexity are reduced at the same time.

The utility model relates to the technical field of sewing machines, in particular to an oil receiving box of a sewing machine, which comprises a box body arranged on a base of the sewing machine, the upper side face of the box body is concave inwards to form an oil cavity, one side face of the box body is concave inwards to form a groove, and an oil outlet pipe joint and an oil return pipe joint which are communicated with the oil cavity are arranged in the groove. An operation notch is formed in the side face, close to the groove, of the box body, a drawable cover body is arranged at the operation notch through a mounting assembly, a filter screen used for filtering engine oil flowing back into the oil cavity is arranged in the cover body, and the cover body is pulled out of the operation notch to be used for driving filter residues to be discharged out of the oil cavity. Through the arrangement of the mounting assembly, the operation notch and the cover body, in actual use, the cover body is not fixed by the mounting assembly, the operation notch can be opened by pulling the cover body out of the operation notch, an operator can clean the oil filter screen mesh of the oil pump in the oil cavity through the operation notch, the whole oil box does not need to be disassembled, and operation is easy and convenient.

To achieve a grease supply structure for a sewing machine hook which can suitably supply grease.SOLUTION: In a grease supply structure 100 for a sewing machine hook, an agitation member 11c can move in a grease storage part 11 to agitate grease G in the grease storage part 11 due to actions of a centrifugal force F1 caused by rotation of a shuttle race 1 and inertia forces F2, F3 caused by acceleration and deceleration of the rotation of the shuttle race 1 every time actuation and stop of a sewing machine are repeated. The agitation member 11c agitates the grease G in the grease storage part 11 to make the grease G hard to be separated so that a prescribed property is maintained. Thereby, the grease G is suitably fed out to the grease supply channel 12 from the grease storage part 11 by the centrifugal force F1 caused by the rotation of the shuttle race 1, and the grease G fed out to the grease supply channel 12 reaches a race groove 1a through a through-hole 5a of a core material 5, and the grease G can be suitably supplied to a sliding part (a race groove 1a, a race projection 2a) of a sewing machine hook 3.SELECTED DRAWING: Figure 1

The utility model discloses a zipper sewing machine with a heat dissipation function, which belongs to the technical field of zipper sewing machines and comprises a workbench, a support is fixed at the bottom end of the workbench, a sewing machine body is fixed on the side face of the top end of the workbench, and a machine needle is mounted on a machine head of the sewing machine body. A machine head of the sewing machine body is provided with a heat dissipation assembly arranged outside the machine needle in a sleeving mode, the output end of the air pump is connected with an air conveying pipe, and a clamping assembly is arranged between the heat dissipation assembly and the machine head of the sewing machine body. Cold air in the external environment is sucked through the air pump and conveyed into the air conveying pipe, the cold air is blown out to the machine needle in a surrounding mode through the heat dissipation assembly, the machine needle is evenly cooled, the machine needle is synchronously cooled during high-speed operation, the service life of the machine needle is prolonged, and the phenomenon that when the zipper sewing machine works, the machine needle is damaged is avoided. The problem that zipper sewing deviates due to the fact that a machine needle is prone to deformation due to too high temperature is solved, sewing precision is effectively improved, and the overall sewing effect is improved.

The invention relates to the technical field of sewing machines, in particular to an anti-blocking driving device of a feeding eccentric wheel assembly of a sewing machine, which comprises a machine shell, a motor, a driving main shaft, a feeding eccentric wheel body, an eccentric wheel shaft sleeve and a feeding connecting rod, an oil supplementing channel is coaxially formed in the feeding connecting rod; the oil supplementing tank enables lubricating oil to continuously flow into the oil supplementing cavity through the oil supplementing channel by means of gravity difference to form a dynamic lubricating film, continuous lubricating oil supplementing can avoid oil film breakage caused by heat generated by friction of a contact surface, metal direct contact is reduced, the lubricating period is prolonged by 3-5 times, and the service life is prolonged by 3-5 times. The problem that when the feeding eccentric wheel and the feeding connecting rod in the feeding eccentric wheel assembly of the sewing machine operate at a high load for a long time, a metal contact face generates high temperature due to insufficient lubrication, and materials are expanded and stuck is solved, and the durability and reliability of the anti-blocking driving device of the feeding eccentric wheel assembly of the sewing machine are guaranteed.

The utility model discloses a self-driven cooling automatic thread trimming device which comprises a driving assembly and a shearing assembly which are installed on a shuttle race transmission shaft, and the shearing assembly comprises a movable cutter and a fixed cutter. Wherein the movable cutter is fixedly connected with the thread trimming transmission shaft sleeve through a movable cutter holder and a thread trimming transmission shaft sleeve coaxially sleeved outside the shuttle race transmission shaft, and the driving assembly drives the thread trimming transmission shaft sleeve to drive the movable cutter to rotate relative to the fixed cutter; an automatic oil supply assembly driven by friction heat is arranged between the rotating shuttle and the shuttle race transmission shaft; the lubricating oil is added in real time along with the temperature rise in the using process of the rotating shuttle and the viscosity change of the lubricating oil, and the lubricating oil is provided for lubrication while heat dissipation is conducted.

The oil box of the sewing machine comprises a box body with a containing cavity and a cover body arranged above the box body in a covering mode, the oil box of the sewing machine further comprises an oil quantity detection device, the oil quantity detection device comprises a first light-transmitting element, a transmitting element and a receiving element, the first light-transmitting element extends in the up-down direction, and the receiving element extends in the up-down direction. The upper part of the shell is connected with the cover body, and the lower part of the shell extends to the bottom of the accommodating cavity; the transmitting element is arranged on the cover body and is used for transmitting a detection light beam into the first light transmitting element; the receiving element is arranged on the cover body and is used for receiving the detection light beam emitted from the first light transmitting element; a reflection structure capable of reflecting a detection light beam is arranged on the lower portion of the first light-transmitting element, the reflection structure is arranged on a light emitting path of the emitting element, the receiving element is arranged on an emitting path of the detection light beam reflected by the reflection structure, and the detection device can save manpower and achieve real-time monitoring of the oil quantity.

The utility model provides an oil quantity adjusting device of a sewing machine, and belongs to the technical field of sewing machines. The oil supply device solves the problem that an oil supply device of an existing sewing machine is difficult to effectively adjust oil quantity. The oil quantity adjusting device of the sewing machine comprises an oil disc, an oil inlet pipe and an oil return pipe, a first adjusting valve is connected to the oil inlet pipe, a second adjusting valve is connected between the oil return pipe and the oil disc, the first adjusting valve comprises a first valve body and a first rod-shaped adjusting piece, and a first oil inlet hole, a first oil outlet hole and a first adjusting hole which are communicated with one another are formed in the first valve body; the first adjusting piece is in threaded connection with the interior of the first adjusting hole of the first valve body, the outer end of the first adjusting piece extends out of the first valve body, a first conical face is arranged on the outer side of the inner end of the first adjusting piece, and the diameter of the first conical face is gradually increased from inside to outside. When the first adjusting piece is screwed in along the threads, the inner end of the first adjusting piece can stretch into the first oil outlet hole and block the first oil inlet hole and the first oil outlet hole. The oil quantity adjusting device of the sewing machine has the advantage that the oil quantity can be conveniently adjusted.

The utility model discloses a needle bar oil-proof device and a sewing machine in the technical field of sewing machines. The needle bar oil-proof device comprises a needle bar, the lower bush is arranged on the needle rod in a sleeving manner, and the lower bush and the needle rod can move relative to each other in the axial direction; the oil sealing sleeve is arranged on the lower lining in a sleeving mode, the top end of the oil sealing sleeve is fixedly connected with the bottom end of the lower lining, the bottom end of the oil sealing sleeve is connected with an upper elastic lip and a lower elastic lip, the upper elastic lip and the lower elastic lip are located under the lower lining, the upper elastic lip extends upwards in an inclined mode and elastically abuts against the needle rod, and the lower elastic lip extends downwards in an inclined mode. And the lower elastic lip obliquely extends downwards and is elastically propped against the needle rod. The oil-proof device not only can prevent lubricating oil from seeping down from the gap between the needle rod and the lower lining and prevent sewing materials from being polluted, but also can prevent the needle rod from clamping thread hairs, and is simple in structure and convenient to install and maintain.