51results about "Lubrication/cooling devices" patented technology

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 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 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 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 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 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 utility model relates to a seamless knitted underpants sewing machine, and relates to the technical field of sewing machinery, the seamless knitted underpants sewing machine comprises a rack and a sewing machine body arranged on the rack, the rack is provided with a cooling mechanism used for cooling the sewing machine body, and the cooling mechanism comprises a cooling plate head, a cooling plate shell, a cooling water tank, a liquid outlet pipe, a liquid return pipe and a heat dissipation assembly. The cooling plate head is tightly attached to the outer side wall of the sewing machine body, then the water suction pump is started to pump the cooling liquid into the liquid outlet pipe, the liquid outlet pipe guides the cooling liquid into the cooling cavity formed by the cooling plate shell and the cooling plate head, and therefore the outer side wall of the sewing machine body is cooled; and the probability that the sewing machine body is overheated after working for a long time is reduced.

The utility model discloses a kind of rotary shuttle oil supply devices of quilting machine, including oil tank, the top surface of the oil tank is fixedly connected with cover, the inside of the cover is provided with the cooling mechanism of cooling oil, the both sides of the oil tank are provided with the dismounting mechanism for the installation of oil tank, the cooling mechanism includes fan, grid, electric slide rail and dismounting mechanism, the fan is arranged in the inside of cover, the surface of the cover is provided with the limiting slot compatible with fan, the grid is fixedly connected at the top surface of fan, the top surface one side of cover is connected with electric slide rail, the cleaning brush is slidably connected at one side of electric slide rail, the bottom surface of the cleaning brush is attached to the top surface of grid;The utility model is simple in structure, reasonable in design, beneficial to cooling lubricating oil, avoid leading rotary shuttle then easy to be hot, jam, wear, thereby leading its service life to be greatly shortened, convenient dismounting device to facilitate later maintenance, improve its practicality.

The invention relates to the related technical field of sewing machines, in particular to a needle rod assembly, a buttonholing machine and a machine needle cooling method. The needle bar assembly comprises a sleeve, a needle bar and a machine needle. The sleeve is used for being fixedly connected to the needle bar frame. The needle rod is slidably arranged in the sleeve in a penetrating mode, a through needle rod channel is formed in the needle rod in the axial direction of the needle rod, and the end, located in the needle rod channel, of the needle rod is connected with a piston, so that an air chamber is defined by the needle rod, the piston and the sleeve; the machine needle is fixedly connected to the other end, in the needle rod channel, of the needle rod, a machine needle channel is formed in the machine needle, and a vent hole is formed in the peripheral wall of the machine needle and communicated with the machine needle channel; and the vent hole is communicated with the air chamber through the needle channel and the needle rod channel. The piston is driven by the needle rod to reciprocate in the air chamber, upward air suction and downward air discharge of the machine needle are achieved, air flowing through the machine needle is used for heat dissipation of the machine needle, the heat dissipation mode does not need external power and is suitable for swing working conditions such as a buttonholing machine, and the problem of sewing thread breakage caused by overheating of the machine needle is solved.

The invention discloses automatic tightness connecting equipment which comprises a sewing workbench, the front end of the sewing workbench is fixedly connected with a conveying workbench, the lower portion of one end of the conveying workbench is fixedly connected with a heating workbench, and the upper end of the heating workbench is fixedly connected with a heating control frame. According to the automatic tightness connecting equipment, a second control motor drives a second rotating rod to drive a first bevel gear to rotate, the first bevel gear and a second bevel gear are in meshing transmission, and a third rotating rod on the inner wall of the second bevel gear drives an adjusting threaded rod to rotate on the inner side of an adjusting groove; according to the elastic band feeding device, the movable block moves on the outer wall of the adjusting threaded rod, so that the movable limiting plate is driven to move, manual intervention can be reduced, the feeding and conveying process is more continuous and efficient, the overall production efficiency is improved, meanwhile, the position and tension of an elastic band can be more accurately controlled, and the quality and consistency of products are guaranteed.

An oil-free rotating shuttle cooling structure comprises a shuttle race, a shuttle skin, a shuttle frame and a shuttle plate, a fan blade set is arranged on the shuttle race, and the fan blade set is used for sucking hot air away from the interior of a rotating shuttle or blowing air into the rotating shuttle; the fan blade group comprises blades, and the outer edges of the blades do not exceed the running contour curved surface of the shuttle race; hot air is sucked away from the interior of the rotating shuttle in the working direction of the blades. Air can also be blown into the rotating shuttle, especially in the guide rail direction; due to the fact that the fan installation face and the shuttle race thread hooking portion are staggered in position, when the sewing machine works, the influence of airflow on a thread ring generated by sewing threads is small; the fan blades are integrated on the rotating shuttle, so that the working state of the rotating shuttle, namely the rotating speed and the cooling amount, forms a proportional relation, namely the rotating speed is high, the required cooling requirement is increased, the rotating speed of the fan blades is increased, the cooling air amount is increased, the rotating speed and the cooling air amount form a dynamic balance cooling and heating relation, tedious procedures and structures such as adjustment are omitted, and the technical effect of self-adaptive cooling is achieved.

The present application relates to sewing machine technical field, provide a kind of sewing machine, the left side of base is equipped with lubricating chamber, including adjacent and intercommunication first cavity and second cavity;Lift tooth mechanism's lift tooth shaft passes through second cavity, and the lift tooth shaft in second cavity is equipped with driving gear;Rotary hook mechanism's rotary hook shaft passes through first cavity, and the rotary hook shaft in first cavity is equipped with driven gear;Driving gear and driven gear engage, so that lift tooth shaft drives rotary hook shaft;First cavity side wall for rotary hook shaft to pass through is equipped with shaft sleeve, and rotary hook shaft is rotationally arranged in shaft sleeve;Shaft sleeve is equipped with oil inlet channel, oil outlet channel;Oil inlet channel is communicated with the oil pipe of oil supply component;Oil outlet channel is communicated with the return pipe of oil supply component;Rotary hook shaft and oil supply component cooperate to transport the oil in oil inlet channel to oil outlet channel;Oil outlet channel is provided with branch channel, and branch channel is communicated to lubricating chamber;This ensures that only a little lubricating oil is supplied each time, avoiding excessive supply of lubricating oil.

The sewing machine rotating shaft sleeve capable of absorbing the redundant lubricating oil comprises a rotating shaft sleeve body and a connecting cover arranged on the left side of the rotating shaft sleeve body, a rotating shaft body is arranged on the inner side of the rotating shaft sleeve body, a connecting block is arranged on the right side of the rotating shaft sleeve body, and a fixing ring is arranged on the right side of the connecting block. According to the sewing machine rotating shaft sleeve capable of absorbing the redundant lubricating oil, the redundant leaked lubricating oil of a device can be conveniently absorbed in the using process, so that the redundant lubricating oil is not prone to leaking outwards along a gap formed by connecting a sewing machine rotating shaft and the sewing machine rotating shaft sleeve, and the situation that the attractiveness of the device is affected is avoided; leaked lubricating oil is prevented from entering other parts, the service life of the other parts of a machine body is guaranteed, meanwhile, a one-way oil adding structure is arranged, so that the lubricating oil is not prone to leaking towards the outer side of the device along an oil adding opening, the overall sealing performance of the device is improved, and the better using effect is achieved.

The utility model relates to the technical field of sewing machines, in particular to a sewing machine oil return structure and a sewing machine. An oil return structure of a sewing machine is used for recycling lubricating oil on a needle bar in the sewing machine and comprises a machine shell and an oil pump, the needle bar can penetrate through the machine shell, an oil scraping piece and an oil return pipeline are arranged in the machine shell, and the oil scraping piece is used for scraping the lubricating oil on the needle bar into the oil return pipeline; the oil pump is installed on the machine shell and communicated with the oil return pipeline. The oil return pipeline is arranged in the machine shell, the problem that the oil return pipeline is prone to colliding and being pulled to be broken is solved, and the leakage risk when lubricating oil flows through the oil return pipeline can be reduced.

The utility model provides a dual-purpose rotating shuttle oil supply device. The utility model mainly solves the problem that the single piston oil supply mechanism cannot meet the demand of adjusting the oil amount of the rotating shuttle under different working conditions. The utility model is characterized in that the piston oil supply mechanism and the spiral oil supply mechanism are arranged between the shaft sleeve and the main shaft. The utility model has the advantages that the utility model provides a dual-purpose rotating shuttle oil supply device, which has two sets of oil supply systems to meet different demands. Furthermore, the mounting plate of the piston mechanism is arranged on the shaft sleeve instead of the support, which is convenient for adjustment. The adjusting valve with the oil amount adjusting mechanism is arranged outside, which is convenient for operation.

The invention relates to a shuttle frame assembly module of sewing equipment and the sewing equipment of a double-needle machine, the shuttle frame assembly module is used for being matched with a machine needle of the sewing equipment to operate a sewing thread, the sewing equipment comprises a lower shaft for providing driving force, and the shuttle frame assembly module comprises a shuttle frame, a shuttle rod and a shuttle rod, the rotating shuttle is linked with the lower shaft, and the rotating shuttle is rotationally mounted on the shuttle frame; the needle plate is fixed to the shuttle frame, and an avoiding opening is formed in the needle plate; the feed dog is linked with the lower shaft, and the feed dog is movably arranged at the avoiding opening; when the shuttle frame slides along the lower shaft, the rotating shuttle, the needle plate and the feed dog synchronously follow the shuttle frame. According to the technical scheme, the innovative shuttle frame assembly module is provided, the basic adjusting unit capable of being adjusted in a linkage mode is formed through the shuttle frame, the rotating shuttle, the needle plate and the feed dog, and the shuttle frame assembly module has the technical advantages of being low in operation difficulty, high in production efficiency, high in intelligent degree and good in adaptability to different garment process requirements.

The utility model provides a kind of oil quantity control device of rotating shuttle, belong to sewing equipment technical field.Oil quantity control device includes cylinder, and the passage that is passed through cylinder is set up on cylinder, and adjustable column is provided in passage, and adjustable column has intercommunication, and control device further includes the driving member for driving adjustable column rotation and make intercommunication pass through passage or make adjustable column close passage.This oil quantity control device adopts the mode of driving member driving adjustable column rotation to carry out oil supply quantity adjustment, the rotation angle of driving member in different time periods can be set, to automatically adjust the oil supply quantity of rotating shuttle in different time periods.

The utility model discloses a tooth frame pin, tooth frame lubrication structure and sewing machine in the technical field of sewing machine, the tooth frame pin comprises a first connecting section, an eccentric section and a second connecting section which are axially and fixedly connected, an oil filling hole is formed on the tooth frame pin, the oil filling hole axially penetrates through the first connecting section and extends to the eccentric section, a grease hole is formed on the eccentric section, and the grease hole is communicated with the eccentric section. And one end of the grease hole is communicated with the oil injection hole. Lubricating grease is injected into the oil storage groove through the oil injection hole and the grease hole and sealed through the hole plug, more lubricating grease can be stored between the feed dog frame and the feed dog frame pin, the lubricating grease can be conveniently added, the stability and the long-term effect of lubrication can be guaranteed, and the sewing effect is improved.

The rotating shuttle oil quantity adjusting structure comprises a base, a lower shaft, a lower shaft front sleeve, an oil inlet adjusting valve and an oil pump, the lower shaft, the lower shaft front sleeve, the oil inlet adjusting valve and the oil pump are installed on the base, the lower shaft front sleeve is installed on the lower shaft, and the oil pump is located at one end of the lower shaft; an oil inlet of the oil inlet adjusting valve is connected with an oil outlet of the oil pump through a rear connecting oil way, an oil outlet of the oil inlet adjusting valve is connected with an oil inlet hole of the lower shaft front sleeve through a front connecting oil way, an adjusting screw hole communicated with the oil return hole is formed in the lower shaft front sleeve, and an oil return adjusting screw is installed in the adjusting screw hole. The mode of simultaneously adjusting the oil inlet amount and the oil return amount is adopted, extensive adjustment of the oil inlet amount of the lower shaft front sleeve is achieved by controlling the opening degree of the oil inlet adjusting valve, fine adjustment of the oil return amount of the lower shaft front sleeve is achieved by controlling screwing-in and screwing-out of the oil return adjusting screw, and therefore the adjusting difficulty of the oil supply amount of the rotating shuttle is reduced, and the adjusting efficiency is improved. And the workload of operators is reduced.

The application discloses a spinning oil quantity adjusting device and method, and the spinning oil quantity adjusting device comprises a shaft sleeve, a spinning shaft, a spinning shuttle, an oil tank, an oil pump, a first detection piece, a second detection piece and a controller; the shaft sleeve is provided with an oil inlet, an oil outlet and a first oil supply channel which is in communication with the oil inlet and the oil outlet; the spinning shaft is arranged in the shaft sleeve, and the spinning shuttle is provided with a second oil supply channel which is in communication with the first oil supply channel; the spinning shuttle is sleeved on the spinning shaft; the oil tank, the oil pump and the oil inlet are sequentially connected, and the oil outlet is connected with the oil tank; the first detection piece and the second detection piece are electrically connected with the controller; the first detection piece is used for detecting the oil pressure in the first oil supply channel and / or the second oil supply channel; the second detection piece is used for detecting the vibration parameter and / or the noise parameter of the spinning shuttle; and the controller can adjust the oil pressure according to the vibration parameter and / or the noise parameter. In this way, the application can effectively inhibit the noise while ensuring sufficient lubrication.

The utility model belongs to the technical field of sewing machine relates to a dry type shuttle mechanism of sewing machine, including shuttle bed, shuttle frame and shuttle skin, the inside of shuttle bed is provided with guide rail groove, the shuttle frame sets up in the shuttle bed and its guide rail assembly is in guide rail groove, the shuttle skin is fixed in the outside of shuttle bed along the circumference pasting formula, the pasting surface of shuttle bed and shuttle skin is provided with oil storage groove, the fixed seal structure of oil storage groove of shuttle skin and shuttle bed, the inside of oil storage groove is filled with solid grease, the bottom of oil storage groove is provided with through -hole of intercommunication guide rail groove. The dry type shuttle mechanism of sewing machine provided by the utility model has the advantages that the structure is simple, oil supply is controllable, and the problem of oil stains can be avoided.

The utility model discloses a sewing machine lubricating system and a sewing machine, the sewing machine comprises a machine base and a machine head arranged on the upper portion of the machine base, the lubricating system comprises a first oil box, an oil collecting box and an oil disc, and the first oil box is connected with parts in the machine head through a first oil supply pipe; parts in the machine head are connected with the oil collecting box through an oil outlet pipe, and the oil collecting box is connected with parts in the machine base through a second oil supply pipe. The oil pan is located below parts in the machine base and used for receiving oil, the oil pan is connected with the first oil box through an oil return pipe, and an oil pump is arranged on the oil return pipe; oil supply lines are arranged in the first oil supply pipe, the oil outlet pipe and the second oil supply pipe, a first circulation loop of oil is formed among the first oil box, the first oil supply pipe, the oil outlet pipe, the oil collecting box, the second oil supply pipe, the oil disc and the oil return pipe, the lubricating system is simple in structure, and the oil utilization rate can be increased.

The utility model discloses a lower curved needle driving lubricating mechanism of a flat seaming machine, which comprises a front shaft sleeve arranged in a machine base, a curved needle driving shaft capable of rotating and axially moving is arranged in the front shaft sleeve, the front shaft sleeve is provided with a first mounting part and a second mounting part which are matched with the curved needle driving shaft, and an oil seal inner cavity is arranged between an oil seal and the first mounting part. A first cavity is formed between the first mounting part and the second mounting part, and is provided with a communication port communicated with the outside of the front shaft sleeve; a second cavity for injecting lubricating oil is arranged between the second mounting part and the rear end of the front shaft sleeve, and the front shaft sleeve is provided with an oil inlet and an oil outlet which are communicated with the second cavity; and an air pressure balance hole for communicating the oil seal inner cavity with the first cavity is formed in the first mounting part. Air pressure balance of the oil seal inner cavity and the first cavity is maintained through the air pressure balance hole, lubricating oil in the oil seal inner cavity can flow back to the first cavity conveniently, the oil seal is prevented from being disengaged from the front shaft sleeve, lubricating oil seepage is avoided, and the service life is prolonged.

The utility model discloses a click type intermittent oil supply device of a sewing machine, and relates to the field of sewing machines, the click type intermittent oil supply device comprises an oil box, an oil pump and a rotating shuttle which are communicated in sequence, the click type intermittent oil supply device further comprises a power piece which drives the oil pump to do intermittent motion in a click mode, the valve core is mounted in the pump body; the bottom of the valve element is matched with the interior of the pump body to form an abdominal cavity, the abdominal cavity is communicated with the oil inlet and the oil outlet, and a first non-return assembly used for preventing oil in the abdominal cavity from flowing back to the oil inlet is arranged in the oil inlet or the pipeline. A second non-return assembly used for preventing oil from flowing back to the abdominal cavity is arranged in the oil outlet or the pipeline. The oil control device has the advantages of being accurate in oil control and good in practicability.

The utility model discloses an intelligent heat dissipation type quilting machine control case, relates to the technical field of case heat dissipation, and aims to solve the technical problems that the wind power guide angle of a current fixed fin is fixed, a large amount of wind power is directly discharged, and consequently the energy utilization rate is poor in the heat exchange process, the intelligent heat dissipation type quilting machine control case comprises a top disc, a fin mechanism and an inner cylinder, an air cylinder is installed at an opening in the upper end of the end cover, a rotating ring is rotatably installed in a cavity between the top disc and the end cover, the inner cylinder is installed in the opening of the end cover, adjusting through openings are formed in the outer side of the top disc in an annular array mode, a base disc is arranged on the lower side of the top disc, and the fin mechanisms are distributed between the top disc and the base disc in an annular array mode. The fin mechanism is composed of outwards-extending fins and inwards-swinging fins, and the outwards-extending fins and the inwards-swinging fins are rotationally connected through hinges. The heat exchanger has the advantages that the dynamic fin structure is flexibly guided, airflow is fully contacted with the two sides of the fins, and the heat exchange efficiency is improved.