104results about "Lubrication/cooling devices" patented technology

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 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 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 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 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.

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 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 application provides a lubricating device of a sewing machine and belongs to the technical field of sewing machines. The lubricating device of the sewing machine solves the problem of poor oil supply effect of the existing lubricating device. The lubricating device of the sewing machine comprises a rack base plate, a machine shell bottom plate arranged on the rack base plate, a rotating shuttle seat connected with the machine shell bottom plate and located below the machine shell bottom plate, a needle bar swing frame connected above the machine shell bottom plate, and a transmission assembly connected with the needle bar swing frame. The transmission assembly comprises a feeding connecting rod for driving the needle bar swing frame to swing. The lubricating device comprises an oil pump connected with the machine shell bottom plate, an oil pump leaf spring arranged on the oil pump and linked with the feeding connecting rod to realize oil pumping, an oil quantity control assembly connected with an oil outlet end of the oil pump and capable of controlling the maximum output oil flow, an oil pipe I and an oil pipe II connected with an oil outlet end of the oil quantity control assembly, and an oil outlet of the oil pipe I located on the rotating shuttle seat. The lubricating device of the sewing machine can not only improve the oil supply effect of the lubricating device but also not affect the sewing of the sewing machine when the rotating speed is high.

The hand wheel structure comprises an airflow ring and an impeller, the airflow ring is integrally cylindrical, an annular airflow channel is formed in the airflow ring, an airflow inlet is formed in one axial end of the airflow ring, the axial middle of the airflow ring shrinks inwards, and the impeller is arranged in the airflow ring. The other axial end of the airflow ring is provided with a flow guide section with the shape expanding outwards. The impeller comprises a base disc and blades, the base disc and the flow guide section are arranged at intervals in the axial direction, an airflow distribution area is formed between the base disc and the flow guide section and communicated with the airflow channel, the periphery of the airflow distribution area is of an open structure and serves as an airflow outlet, and the middle of the base disc is used for being connected with a main shaft of the sewing machine. The blades are located in the airflow distribution area and distributed at intervals in the circumferential direction, airflow enters the airflow channel in the axial direction, passes through the airflow distribution area and then is outwards diffused and output in the radial direction, the airflow flow and the airflow pressure are improved, and then the heat dissipation effect is improved.

The invention provides an overturning structure of a cylinder type sewing machine, and belongs to the technical field of cylinder type sewing machines. The problem that an existing cylinder type sewing machine is troublesome to debug and maintain is solved. The sewing machine comprises a base and a main body arranged on the base, the turnover structure comprises a dumping plate, the main body and the base are hinged at the back, a long-strip-shaped sliding hole is formed in the dumping plate, at least one limiting wall is arranged on the hole wall of the sliding hole, a sliding pin is fixedly connected to the tail of the main body, and the bottom of the dumping plate is hinged to the tail of the base. The sliding pin penetrates through the sliding hole, when the main body rotates relative to the base, the dumping plate rotates around the hinge point of the dumping plate and the sliding pin moves along the sliding hole, when the sliding pin abuts against the limiting wall, the base pulls the main body through the dumping plate and the sliding pin to enable the main body to incline and be positioned, and when the main body abuts against the base, the dumping plate and the sliding pin move along the sliding hole. And the main body and the base can be fixedly connected through a locking piece. The overturning structure of the barrel type sewing machine has the advantage that the barrel type sewing machine is convenient to debug and maintain.

The utility model discloses an oil pump for a sewing machine, belongs to the technical field of oil pumps, and solves the problems that an existing device hinders circulation of oil only through a check block, the pressurization effect on the oil is poor, and the oil supply amount of the oil pump is prone to being reduced. The oil pump comprises a pump body, the pump body comprises a front portion, a middle portion and a rear portion, and an oil cavity is formed in the pump body. A baffle is arranged on the upper right side of the inner wall of the oil cavity and divides the oil cavity into a pressurizing area on the left side and an oil outlet area on the right side, an oil discharging hole located in the upper right corner is formed in the back face of the oil outlet area, the oil discharging pipe is communicated with the oil discharging hole, and a pressurizing assembly driven by a motor is arranged in the pump body. Through the arrangement of the gear groove and the baffle, oil in the pressurizing area can be pressurized for the first time, through the arrangement of the idle gear, the pressurizing gear and the gear groove can rotate together, then oil entering the oil outlet area is pressurized for the second time through the pressurizing gear, and the oil supply effect of the oil pump can be improved.

The utility model relates to the technical field of feed lifting forks, and discloses a feed lifting fork for an intelligent sewing machine, which comprises a mounting piece, an elastic opening arranged on the upper surface of the mounting piece, a feed fork piece fixedly connected to the outer surface of the mounting piece, a mounting block fixedly connected to the outer surface of the mounting piece, and a notch arranged on the outer surface of the mounting piece. A through hole is formed in the inner wall of the tooth fork piece, a lubricating structure is arranged on the inner wall of the tooth fork piece, and in order to enable oil to make better contact with the interior of a part, after a sliding block is installed in the tooth fork piece and large friction force is generated between the sliding block and the tooth fork piece, the oil is placed in a containing groove; when the sliding block moves in the tooth fork piece, oil can slide into the main sliding way, the auxiliary sliding way and the sliding groove along the inclined face arranged on the inner wall of the containing groove, the oil in the main sliding way, the auxiliary sliding way and the sliding groove can make contact with the outer surface of the sliding block when the sliding block moves in the tooth fork piece, and the oil can make uniform contact with the inner wall of the tooth fork piece along with movement of the sliding block.

The utility model relates to the technical field of garment sewing processing, in particular to an automatic thread trimming device for garment sewing, which is provided with adaptable thread clamping structures at the upper part and the lower part, so that the thread can be stably trimmed, and the practicability is improved; comprising a horizontal transverse moving frame, sliding blocks, a hinged frame, a hinged shaft, a hinged block, a shearing movable frame, a movable sleeve, a restraining shaft, a shear body, a connecting frame, a spring and a clamping plate, the inner side of the horizontal transverse moving frame is slidably connected with the outer sides of the two sets of sliding blocks, and a reciprocating driving mechanism is arranged between the horizontal transverse moving frame and the sliding blocks; the middle of the front end of each sliding block is connected with the rear side of the corresponding hinge frame, the inner side of the middle of each shearing movable frame is connected with the outer side of the corresponding movable sleeve, restraint shafts are movably arranged on the inner sides of the two movable sleeves, and the inner sides of the front portions of the two shearing movable frames are connected with the corresponding shearing bodies. The upper side and the lower side of the front end of each sliding block are connected with the rear side of a connecting frame, and the front portions of the inner sides of the connecting frames are connected with the middles of the outer sides of the clamping plates through springs.

The utility model belongs to the technical field of sewing machine accessories, and relates to an electromagnet mounting structure of a sewing machine, which comprises a casing and an electromagnet, a mounting seat is formed on the casing, an inner hole matched with a shell of the electromagnet is arranged in the mounting seat, the outer side of the mounting seat is hermetically connected with a housing covering the outer end part of the electromagnet, and the electromagnet is arranged in the housing. A threading hole for a lead of the electromagnet to penetrate through is formed in the housing, a threading hole plug is assembled in the threading hole, a sealing hole matched with the lead of the electromagnet is formed in the threading hole plug, and sealing structures are formed between the threading hole plug and the threading hole and between the sealing hole and the lead. The electromagnet installation structure of the sewing machine has the advantages of being simple in structure, convenient to install and good in sealing performance.

The invention relates to a cooling device for an oil disc in a sewing machine, the cooling device comprises an internal cooling mechanism, a first housing and an air circulation driving mechanism, the first housing is arranged on the outer wall of the oil disc, a first air cavity is formed between the first housing and the oil disc, the internal cooling mechanism is arranged in the oil disc and comprises a plurality of cooling pipes, the thickness of each cooling pipe is 0.2-2.0 mm, and the air circulation driving mechanism is arranged in the first air cavity. The cooling pipe is fixedly connected with the oil tray, a first port of the cooling pipe is communicated with the first air cavity, a second port of the cooling pipe is communicated with the outside of the oil tray, and the air circulation driving mechanism is connected with the first air cavity of the first housing and can blow or exhaust air to the first air cavity.

The sewing machine pinhole plate allowing the temperature adjusting medium to flow in and the pinhole plate structure of the sewing machine pinhole plate comprise the following two aspects that firstly, the sewing machine pinhole plate allowing the temperature adjusting medium to flow in comprises a plate body and a pinhole which is formed in the middle of the plate body and allows a machine needle to be inserted, and a protruding structure is arranged at the bottom of the plate body in a protruding mode; the needle hole penetrates through the protruding structure, a first medium inflow through hole is formed in one end of the protruding structure, a second medium inflow through hole is formed in the other end of the protruding structure, and annular grooves communicated with the first medium inflow through hole and the second medium inflow through hole are formed in the side wall of the needle hole. The pinhole plate structure comprises medium manufacturing equipment, a control valve connected with the medium manufacturing equipment, a medium pipe connected with the control valve and the sewing machine pinhole plate which is connected with the medium pipe and can allow the temperature adjusting medium to flow in.

To provide a sewing machine that suppresses adhesion of lubricant to unnecessary parts.SOLUTION: A sewing machine includes a sewing machine motor, a needle plate, a lower shaft disposed below the needle plate, which is rotated by power generated by the sewing machine motor, a conversion member fixed to the lower shaft, which converts the rotary motion of the lower shaft to a swing motion, a holding member which holds at least a part of the conversion member, a lubrication port through which lubricant is supplied between the conversion member and the holding member, and a first cover disposed on at least a part of the surroundings of the conversion member. In the axial direction of the lower shaft, the size of the first cover is smaller than that of the lower shaft.SELECTED DRAWING: Figure 11