A precise oil supply device for gears and shuttle of sewing machine

Abstract

The utility model discloses a sewing machine gear and shuttle precision oil supply device, including output assembly, output assembly includes the shuttle spare and the gear spare, output assembly is connected with the oil supply control assembly, the oil supply control assembly includes the oil supply unit and flow control valve, be provided with the output oil pipe on the flow control valve, output oil pipe connects the shuttle spare and the gear spare, be connected with the sensing unit on the shuttle spare and / or the gear spare, sensing unit includes the sensing line of connecting flow control valve. Can realize the effect of accurate control oil supply amount, according to actual working condition accurately control the flow of oil, realize from trace to moderate precision oil supply, on the basis of guaranteeing oil supply sufficient, reduce waste.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and in particular to a precision oil supply device for sewing machine gears and rotary hooks. Background Technology

[0002] As an essential piece of equipment in the textile and garment industry and for home sewing, the stability of a sewing machine's performance and the quality of its sewing are of paramount importance. The rotary hook and transmission gears are crucial components of a sewing machine, responsible for forming lockstitches. Inadequate or untimely lubrication can easily lead to accelerated wear, overheating, or even jamming of these components, thereby affecting the normal operation of the sewing machine, reducing sewing quality, and increasing equipment maintenance costs and downtime.

[0003] For example, publication number "CN218711388U" discloses "a lubrication system for a flat sewing machine," which includes a machine housing, an oil box, an oil reservoir, and a rotary hook assembly located directly above the oil box. The rotary hook assembly includes a rotary hook seat and a rotary hook shaft connected to the rotary hook. The rotary hook seat has a gear cavity. The lubrication system includes an oil pump connected to the oil box and a distributor connected to the oil pump's outlet. The rotary hook seat has a first oil inlet and a second oil inlet. The first oil inlet communicates with the rotary hook shaft, and the second oil inlet communicates with the cavity of the rotary hook seat. The distributor is connected to the first oil inlet via an oil pipe one, the second oil inlet via an oil pipe two, and the oil reservoir via an oil pipe three. However, in practical applications, this type of lubrication device cannot automatically adjust the oil supply according to the actual working conditions. If the oil volume is too large, it causes waste and pollution; if the oil volume is too small, it cannot meet the lubrication requirements. Summary of the Invention

[0004] In view of the problem mentioned in the background art that the existing technology cannot achieve precise quantitative oil supply, this utility model provides a precision oil supply device for sewing machine gears and rotary hooks, which can achieve the effect of precise control of oil supply. It can accurately control the oil flow rate according to the actual working state, and achieve precise oil supply from trace amount to appropriate amount, reducing waste while ensuring sufficient oil supply.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] A precision oil supply device for sewing machine gears and shuttles includes an output component, which includes a shuttle and a gear. The output component is connected to an oil supply control component, which includes an oil supply unit and a flow control valve. The flow control valve is provided with an output oil pipe, which is connected to the shuttle and the gear. A sensing unit is connected to the shuttle and / or the gear, and the sensing unit includes a sensing wire connected to the flow control valve.

[0007] As an essential piece of equipment in the textile and apparel industry and for home sewing, the stability of a sewing machine's performance and the quality of its sewing are of paramount importance. The rotary hook and drive gears are crucial components of a sewing machine, responsible for forming lockstitches. When a double-needle heavy-duty flatbed sewing machine is operating, the rotary hook and drive gears typically rotate at high speeds, often reaching 5000-6000 rpm or even higher. Such high speeds generate significant friction between the various components of the rotary hook and drive gears. If lubrication is inadequate or untimely, this can easily lead to accelerated wear, overheating, or even jamming, thus affecting the normal operation of the sewing machine, reducing sewing quality, and increasing equipment maintenance costs and downtime.

[0008] Currently, a plunger pump is used for oil supply, which utilizes the reciprocating motion of the plunger to achieve oil supply. Although this can guarantee oil supply to a certain extent, it also has some problems. For example, plunger wear may lead to a decrease in oil supply accuracy. The oil supply and volume are uncontrollable, which may result in excessive or insufficient oil supply. Excessive oil supply can easily contaminate the fabric, while insufficient oil supply can easily cause wear or even jamming of the rotary hook and transmission gears. Furthermore, the oil supply is adjusted by pressurizing and depressurizing, which means that once the oil supply is increased, it cannot be reduced. Also, because the oil is transmitted to the rotary hook and transmission gears through the oil felt, the transmission through the oil felt has a certain lag.

[0009] Therefore, to address the aforementioned problems, this application connects sensing units to the rotary hook and gear components of the output assembly to monitor their working status in real time. The monitored quantities include, but are not limited to, rotational speed and temperature. A flow control valve, which can be a solenoid valve, is installed on the oil supply control assembly to control the flow rate. The flow control valve adjusts the flow rate based on real-time electrical signals from the sensing unit, thus precisely controlling the oil flow rate through the actual working status of the rotary hook and gear components, achieving precise oil supply from trace amounts to appropriate quantities. The lubrication points are the rotary hook and gear components, reducing frictional losses during operation. The sensing unit can be installed as needed; it can be installed only on the gear component or the rotary hook component, using the working status of one to determine the overall device condition, or it can be installed on both the gear component and the rotary hook component to ensure the accuracy of the detection data. The oil supply unit in this application is a pump structure capable of transmitting oil, using a conventional oil pump.

[0010] Preferably, several flow control valves are provided, each connected to an independent output oil pipe. These output oil pipes include a rotary hook oil pipe and a gear oil pipe. With multiple flow control valves, each individually connected to its corresponding output oil pipe, each valve can independently control the oil supply in its connected output oil pipe. This allows for precise lubrication of different parts according to actual conditions, improving lubrication control accuracy. The output oil pipes in this application can be divided into rotary hook oil pipes and gear oil pipes. The rotary hook oil pipe is connected to the rotary hook component, while the gear oil pipe is connected to the gear component. The specific connection method can be changed according to the actual installation position and form of the rotary hook component and gear component, as long as the oil in the output oil pipe can lubricate either the rotary hook component or the gear component.

[0011] Preferably, the rotary hook includes a rotary hook end and a rotary hook rod. An oil supply groove is provided inside the rotary hook rod, and an opening is provided on the side of the rotary hook rod away from the rotary hook end. An oil seal is connected to the opening, and the oil seal includes an oil supply pipe communicating with the oil supply groove. The output oil pipe is connected to the oil supply pipe. The oil supply groove is provided inside the rotary hook rod, and an oil seal is connected to the opening of the rotary hook rod. The oil supply pipe on the oil seal is connected to the output oil pipe, which is connected to the oil supply groove, thereby connecting the output oil pipe to the oil supply groove and achieving the lubricating effect of the lubricating oil in the output oil pipe on the rotary hook.

[0012] Preferably, the oil supply groove is spiral-shaped. By making the oil supply groove spiral-shaped, the centrifugal effect during the rotation of the shuttle ensures continuous oil flow and sustained lubrication. Furthermore, an outlet is provided on the shuttle rod, through which the oil flows out and drips onto the oil pan by gravity, thus ensuring oil circulation.

[0013] Preferably, the output component includes a shuttle frame, with the rotary shuttle and gear rotatably connected to the shuttle frame. An oil pan is placed below the shuttle frame, and the oil supply control component includes an oil return unit connected to the oil pan. The output component is equipped with a shuttle frame, where, after lubrication of the rotary shuttle and gear, the lubricating oil flows down the shuttle frame to the oil pan due to gravity, and is then transported back to the oil tank by the oil return pump through the oil return pipe, thereby ensuring the oil circulation effect, improving utilization, and reducing oil waste. The oil return unit is an oil return pump, which can be linked with the power pump to achieve the circulating supply of oil.

[0014] Preferably, the sensing unit includes a temperature sensor and / or a speed sensor. The sensor unit includes a temperature sensor and a speed sensor, and can be a single temperature sensor, a speed sensor, or an integrated sensor combining both.

[0015] Preferably, several flow control valves are provided, and the sensing unit connected to each flow control valve and the output oil pipe correspond to the same rotary hook or gear component. By providing multiple flow control valves and connecting each sensing unit to its corresponding flow control valve, each flow control valve can be independently controlled by its respective sensing unit, thereby achieving individual feedback and individual adjustment, improving efficiency and adjustment accuracy.

[0016] Preferably, the flow control valve contains a movable valve core with several adjusting openings. The movable valve core can align these adjusting openings with the output oil pipe. During operation, energizing the flow control valve adjusts the engagement of the solenoid valve coil, thereby actuating the movable valve core and aligning different adjusting openings with the output oil pipe. The varying sizes of these openings allow for flow control.

[0017] Preferably, the adjustment opening includes a high-level opening and a low-level opening, with a normal-level opening between the high-level and low-level openings. The adjustment opening has three levels, with the normal-level opening positioned in the middle, and the high-level and low-level openings located on either side of the normal-level opening. This allows the normal-level opening to move more quickly to either the high-level or low-level opening, improving the adjustment speed.

[0018] Preferably, the output component includes a left unit and a right unit, both of which are equipped with a shuttle and a gear. The left unit includes a left shuttle and a left gear, and the right unit includes a right shuttle and a right gear. In practical applications, the output component has two units, a left unit and a right unit, each equipped with a shuttle and a gear. Correspondingly, the left and right units also have output oil pipes connecting to the shuttle and gear, respectively, and corresponding sensing units for the shuttle and gear. This ensures independent feedback monitoring and oil supply control for the shuttle and gear in the left and right units. Therefore, in application, the left shuttle, left gear, right shuttle, and right gear each correspond to four independent output oil pipes, which are connected to their respective flow control valves. This allows each flow control valve to control the oil supply to the left shuttle, left gear, right shuttle, and right gear separately, improving control accuracy.

[0019] The beneficial effects of this utility model are as follows: (1) The flow control valve adjusts the flow rate by feeding back the real-time working status electrical signal from the sensing unit. That is, it accurately controls the flow rate of the oil by controlling the actual working status of the rotary hook and gear components, so as to achieve precise oil supply from trace amount to appropriate amount. (2) Due to gravity, the lubricating oil flows along the shuttle to the oil pan, and then is transported back to the oil tank by the return oil pump through the return oil pipeline, thereby ensuring the circulation effect of the oil, improving the utilization rate, and reducing the waste of oil. Attached Figure Description

[0020] Figure 1 This is the first isometric drawing of this utility model.

[0021] Figure 2 This is the second isometric drawing of this utility model.

[0022] Figure 3 This is the third axonometric drawing of this utility model.

[0023] Figure 4 This is a schematic diagram of the movable valve core in this utility model.

[0024] Figure 5 This is a schematic diagram of the rotary shuttle component in this utility model.

[0025] In the picture: 1. Output component; 11. Rotary shuttle component, 111. Rotary shuttle end, 112. Rotary shuttle rod, 113. Oil supply groove, 114. Opening, 115. Oil seal, 116. Oil supply pipe; 12 gear components; 13 Shuttle frame, 131 Left unit, 1311 Left rotary shuttle, 1312 Left gear, 132 Right unit, 1321 Right rotary shuttle, 1322 Right gear; 2 Oil supply control assembly, 21 Oil supply unit, 22 Flow control valve, 221 Movable valve core, 222 Adjustment opening, 223 High-grade opening, 224 Low-grade opening, 225 Normal-grade opening, 226 Controller, 23 Return oil unit, 24 Oil supply chamber; 3 Output oil pipe, 31 Shuttle oil pipe, 32 Gear oil pipe; 4 sensing units, 41 sensing lines; 5. Oil pan. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] Example 1: like Figure 1 As shown, a precision oil supply device for a sewing machine gear and shuttle includes an output component 1, which includes a shuttle 11 and a gear 12. The output component is connected to an oil supply control component 2, which includes an oil supply unit 21 and a flow control valve 22. An output oil pipe 3 is provided on the flow control valve 22, and the output oil pipe 3 is connected to the shuttle 11 and the gear 12. A sensing unit 4 is connected to the shuttle 11 and / or the gear 12, and the sensing unit 4 includes a sensing wire 41 connected to the flow control valve 22.

[0028] As an essential piece of equipment in the textile and apparel industry and for home sewing, the stability of a sewing machine's performance and the quality of its sewing are of paramount importance. The rotary hook and drive gears are crucial components of a sewing machine, responsible for forming lockstitches. When a double-needle heavy-duty flatbed sewing machine is operating, the rotary hook and drive gears typically rotate at high speeds, often reaching 5000-6000 rpm or even higher. Such high speeds generate significant friction between the various components of the rotary hook and drive gears. If lubrication is inadequate or untimely, this can easily lead to accelerated wear, overheating, or even jamming, thus affecting the normal operation of the sewing machine, reducing sewing quality, and increasing equipment maintenance costs and downtime.

[0029] Currently, a plunger pump is used for oil supply, which utilizes the reciprocating motion of the plunger to achieve oil supply. Although this can guarantee oil supply to a certain extent, it also has some problems. For example, plunger wear may lead to a decrease in oil supply accuracy. The oil supply and volume are uncontrollable, which may result in excessive or insufficient oil supply. Excessive oil supply can easily contaminate the fabric, while insufficient oil supply can easily cause wear or even jamming of the rotary hook and transmission gears. Furthermore, the oil supply is adjusted by pressurizing and depressurizing, which means that once the oil supply is increased, it cannot be reduced. Also, because the oil is transmitted to the rotary hook and transmission gears through the oil felt, the transmission through the oil felt has a certain lag.

[0030] Therefore, to address the aforementioned issues, this application connects a sensing unit 4 to the rotary hook 11 and gear 12 of the output component 1 to monitor their working status in real time. The monitored parameters include, but are not limited to, rotational speed and temperature. In this application, a flow control valve 22 is provided on the oil supply control component 2. The flow control valve 22 can be a solenoid valve, which controls the opening 114 to control the flow rate. The flow control valve 22 adjusts the flow rate by receiving real-time electrical signals from the sensing unit 4, thus precisely controlling the oil flow rate through the actual working status of the rotary hook 11 and gear 12, achieving precise oil supply from trace amounts to appropriate quantities. The lubrication points are the rotary hook 11 and the gear 12, reducing frictional loss during operation. The sensor unit 4 can be installed as needed; it can be installed only on the gear 12 or the rotary hook 11, and the working status of one can be used to determine the overall operating condition of the device. Alternatively, the sensor unit 4 can be installed on both the gear 12 and the rotary hook 11, thus ensuring the accuracy of the detection data. The oil supply unit 21 in this application is a pump structure capable of transmitting oil, based on a conventional oil pump.

[0031] like Figure 1 , 2As shown in Figure 3, several flow control valves 22 are provided, each connected to an independent output oil pipe 3. The output oil pipe 3 includes a rotary hook oil pipe 31 and a gear oil pipe 32. Since each flow control valve 22 is individually connected to its corresponding output oil pipe 3, each flow control valve 22 can independently control the oil supply in its connected output oil pipe 3, thereby enabling precise lubrication of different parts according to actual conditions and improving lubrication control accuracy. The output oil pipe 3 in this application can be divided into a rotary hook oil pipe 31 and a gear oil pipe 32. The rotary hook oil pipe 31 is connected to the rotary hook component 11, while the gear oil pipe 32 is connected to the gear component 12. The specific connection method can be changed according to the actual installation position and installation form of the rotary hook component 11 and the gear component 12, as long as the oil in the output oil pipe 3 can lubricate either the rotary hook component 11 or the gear component 12.

[0032] like Figure 5 As shown, the rotary hook 11 includes a rotary hook end 111 and a rotary hook rod 112. An oil supply groove 113 is provided inside the rotary hook rod 112. An opening 114 is provided on the side of the rotary hook rod 112 away from the rotary hook end 111. An oil seal 115 is connected to the opening 114. The oil seal 115 includes an oil supply pipe 116 communicating with the oil supply groove 113. An output oil pipe 3 is connected to the oil supply pipe 116. The oil supply groove 113 is provided inside the rotary hook rod 112, and the oil seal 115 is connected to the opening 114 of the rotary hook rod 112. The oil supply pipe 116 on the oil seal 115 is connected to the output oil pipe 3. The oil supply pipe 116 is connected to the oil supply groove 113, thereby connecting the output oil pipe 3 to the oil supply groove 113, thus achieving the lubrication effect of the lubricating oil in the output oil pipe 3 on the rotary hook 11.

[0033] like Figure 5 As shown, the oil supply groove 113 is spiral-shaped. By setting the oil supply groove 113 into a spiral shape, the oil can be continuously circulated through centrifugal effect during the rotation of the shuttle 11, ensuring a continuous lubrication effect. Furthermore, an outlet is provided on the shuttle rod 112, through which the oil flows out and drips onto the oil pan 5 by gravity, thereby ensuring the circulation of the oil.

[0034] like Figure 1 , 3As shown, the output component 1 includes a shuttle frame 13, a rotary shuttle 11, and a gear 12 rotatably connected to the shuttle frame 13. An oil pan 5 is placed below the shuttle frame 13. The oil supply control component 2 includes an oil return unit 23 connected to the oil pan 5. The output component 1 has a shuttle frame 13. After lubrication, the lubricating oil flows along the shuttle frame 13 to the oil pan 5 due to gravity, and is then pumped back to the oil tank by the oil return pump through the oil return pipe, thus ensuring the oil circulation effect, improving utilization, and reducing oil waste. The oil return unit 23 is an oil return pump, which can be linked with the power pump to achieve the circulating supply of oil.

[0035] The sensing unit 4 includes a temperature sensor and / or a speed sensor. The sensor unit includes a temperature sensor and a speed sensor. The sensing unit 4 can be a single temperature sensor or a speed sensor, or it can be an integrated sensor of temperature sensor and speed sensor.

[0036] like Figure 1 , 2 As shown in Figure 3, several flow control valves 22 are provided, and the sensing unit 4 connected to each flow control valve 22 and the output oil pipe 3 correspond to the same rotary hook 11 or gear 12. With multiple flow control valves 22 and each sensing unit 4 connected to its corresponding flow control valve 22, each flow control valve 22 can be independently controlled by its respective sensing unit 4, thereby achieving individual feedback and individual adjustment, improving efficiency and adjustment accuracy.

[0037] like Figure 4 As shown, the flow control valve 22 contains a movable valve core 221 with several adjusting openings 222. The movable valve core 221 can align the adjusting openings 222 with the output oil pipe 3. During operation, when the flow control valve 22 is energized, the movable valve core 221 can adjust the engagement of the solenoid valve coil, thereby actuating the movable valve core 221 to align different adjusting openings 222 with the output oil pipe 3. Since the openings 114 of the adjusting openings 222 are of different sizes, flow control can be achieved.

[0038] like Figure 4 As shown, the adjustment opening 222 includes a high-level opening 223 and a low-level opening 224, with a normal-level opening 225 positioned between the high-level opening 223 and the low-level opening 224. The adjustment opening 222 has three levels, with the normal-level opening 225 positioned in the middle. The high-level opening 223 and the low-level opening 224 are located on either side of the normal-level opening 225, allowing the normal-level opening 225 to move more quickly to either the high-level opening 223 or the low-level opening 224, thus improving the adjustment speed.

[0039] like Figure 3 As shown, the output component 1 includes a left unit 131 and a right unit 132. Both the left and right units 131 and 132 are equipped with a rotary hook 11 and a gear 12. The left unit 131 includes a left rotary hook 1311 and a left gear 1312, and the right unit 132 includes a right rotary hook 1321 and a right gear 1322. In practical applications, the output component 1 has two units: the left unit 131 and the right unit 132. Both the left and right units 131 and 132 are equipped with a rotary hook 11 and a gear 12. Correspondingly, the left and right units 131 and 132 are also equipped with output oil pipes 3 that connect to the rotary hook 11 and the gear 12, respectively. They are also equipped with sensing units 4 corresponding to the rotary hook 11 and the gear 12, thus ensuring independent feedback monitoring and oil supply control of the rotary hook 11 and the gear 12 on the left and right units 131 and 132. Therefore, in application, the four components—left rotary hook 1311, left gear 1312, right rotary hook 1321, and right gear 1322—correspond to four independent output oil pipes 3, and the four output oil pipes 3 are connected to their respective flow control valves 22. This allows each flow control valve 22 to control the oil supply of the left rotary hook 1311, left gear 1312, right rotary hook 1321, and right gear 1322, thereby improving control accuracy.

[0040] In this embodiment, the assembly and operation process of the precision oil supply device for the sewing machine gear and rotary hook is as follows: The oil supply control component 2 includes an oil supply chamber 24, which contains oil. The oil supply unit 21 is a power pump installed in the oil supply chamber 24. The power pump supplies oil to the flow control valve 22. In this embodiment, the flow control valve 22 is a solenoid valve, and four solenoid valves are provided, each connected to one of the four output oil pipes 3. The four output oil pipes 3 are respectively connected to the left rotary hook 1311 and the left gear 1312. The device includes a right-hand shuttle 1321 and a right-hand gear 1322. The shuttle 11 has a shuttle end 111 at one end and an opening 114 at the other end. An oil seal 115 is connected to the opening 114. An oil supply pipe 116 is provided on the oil seal 115. The oil supply pipe 116 is connected to the oil supply groove 113 inside the shuttle rod 112. The output oil pipe 3 and the shuttle oil pipe 31 of the shuttle 11 are connected. The shuttle oil pipe 31 is connected to the oil supply pipe 116. The gear oil pipe 32 passes through the shuttle frame 13 and is connected to the gear 12.

[0041] The sensing unit 4 used for detecting gear 12 is a combination of a temperature sensor and a speed sensor, used to detect the temperature and speed of the gear. In this embodiment, it is set on both the left unit 131 and the right unit 132 to detect the parameters of the left gear 1312 and the right gear 1322 respectively. The sensing unit 4 used for the rotary hook 11 in this embodiment only includes a temperature sensor to detect the temperature of the rotary hook during operation. The sensor is connected to a sensing line 41. A controller 226 is set in the oil supply control assembly 2 to control each flow control valve 22. The controller 226 receives the detection signals fed back by each sensing line 41 and adjusts the corresponding sensing line 41. 1. Flow control valve 22; For example, when the temperature of gear 12 slowly rises, the temperature sensor in the sensing unit 4 on gear 12 will send a signal to controller 226. At this time, controller 226 will control the engagement of flow control valve 22 to gradually increase, and the oil flow will also gradually increase. When the temperature of gear 12 slowly drops, the engagement of the solenoid valve in flow control valve 22 will gradually decrease, and the oil flow will gradually decrease until it reaches the normal oil volume. When the speed sensor detects that the gear is not rotating, it will send a signal to controller 226. Controller 226 will control all flow control valves 22 to close, that is, the sewing machine stops working. This achieves precise oil supply to the gear.

[0042] Because the rotary hook 11 is fixed to the gear 12, the temperature of the rotary hook 11 mainly comes from the heat transfer generated by the meshing of the gear 12. When the temperature sensor detects a temperature change in the rotary hook 11, it transmits the signal to the controller 226 through the sensor line 41. The controller 226 responds instantly, controlling the suction size of the flow control valve 22. Higher temperature means higher flow, and lower temperature means lower flow. The rotary hook 11 only starts supplying oil after the temperature of the gear 12 rises to a certain value. The temperature value of the rotary hook 11 can be determined by the sensor unit (temperature sensor) installed on the rotary hook 11 according to different actual seams. The type and operating conditions of the sewing machine are set according to the amount of wear. The three adjustment openings 222 in the flow control valve 22 are adjusted according to the different fabrics and operating conditions. For example, when sewing leather, mesh, down and other fabrics, the surface must not be oily, so the movable valve core 221 should be adjusted to the low opening 224; when sewing thin and medium-thick fabrics, the movable valve core 221 should be adjusted to the normal opening 225; when sewing tents, curtains and other fabrics that require long-distance sewing, the movable valve core 221 should be adjusted to the high opening 223. In this way, the precise oil supply to the shuttle and transmission gears is achieved for different fabrics and operating conditions. The oil supplied to the shuttle 11 and gear 12 eventually drips down the shuttle frame 13 into the oil pan 5 due to gravity, and is then pumped back to the oil supply chamber 24 by the oil return unit 23 (oil return pump) to achieve oil recycling, reducing oil waste and environmental pollution.

Claims

1. A precision oil supply device for sewing machine gears and rotary hooks, characterized in that, The device includes an output component, which comprises a rotary hook and a gear component. The output component is connected to an oil supply control component, which comprises an oil supply unit and a flow control valve. The flow control valve is provided with an output oil pipe, which is connected to the rotary hook and the gear component. The rotary hook and / or the gear component is connected to a sensing unit, which includes a sensing wire connected to the flow control valve.

2. The precision oil supply device for sewing machine gears and rotary hooks according to claim 1, characterized in that, The flow control valve is provided in several parts, and each flow control valve is connected to an independent output oil pipe, which includes a rotary oil pipe and a gear oil pipe.

3. The precision oil supply device for sewing machine gears and rotary hooks according to claim 1, characterized in that, The rotary hook includes a rotary hook end and a rotary hook rod. An oil supply groove is provided inside the rotary hook rod. An opening is provided on the side of the rotary hook rod away from the rotary hook end. An oil seal is connected to the opening. The oil seal includes an oil supply pipe that communicates with the oil supply groove. The output oil pipe is connected to the oil supply pipe.

4. A precision oil supply device for sewing machine gears and rotary hooks according to claim 3, characterized in that, The oil supply tank is spiral-shaped.

5. A precision oil supply device for sewing machine gears and rotary hooks according to claim 1, characterized in that, The output component includes a shuttle frame, the shuttle and gear are rotatably connected to the shuttle frame, an oil pan is placed below the shuttle frame, and the oil supply control component includes an oil return unit connected to the oil pan.

6. A precision oil supply device for sewing machine gears and rotary hooks according to claim 1, characterized in that, The sensing unit includes a temperature sensor and / or a speed sensor.

7. A precision oil supply device for sewing machine gears and rotary hooks according to claim 1, characterized in that, The flow control valve is provided in several parts, and the sensing unit and output oil pipe connected to each flow control valve correspond to the same rotary hook or gear.

8. A precision oil supply device for sewing machine gears and rotary hooks according to any one of claims 1-7, characterized in that, The flow control valve is equipped with a movable valve core, which has several adjustment openings. The movable valve core can drive the adjustment openings to align with the output oil pipe.

9. A precision oil supply device for sewing machine gears and rotary hooks according to claim 8, characterized in that, The adjustment opening includes a high-grade opening and a low-grade opening, with a regular-grade opening provided between the high-grade opening and the low-grade opening.

10. A precision oil supply device for sewing machine gears and rotary hooks according to any one of claims 1-7, characterized in that, The output component includes a left unit and a right unit, both of which are equipped with a shuttle and a gear. The left unit includes a left shuttle and a left gear, and the right unit includes a right shuttle and a right gear.

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