A sewing machine

Abstract

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.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textile equipment, in particular to a sewing machine. BACKGROUND

[0002] Sewing machine equipment has become an indispensable technology in the field of textiles. The existing sewing machine includes a head and a base, and the base has a complex transmission mechanism and a lubrication system for providing lubricating oil to the transmission mechanism to reduce wear between mechanical transmissions.

[0003] In the prior art, the functional block division and transmission structure layout of the lower part of the sewing machine base are relatively rough and have not been designed in detail. In terms of development trends, the sewing machine needs to carry more and more diversified functions, resulting in more and more complex transmission structures of the sewing machine, which requires more complex oil lubrication systems. Therefore, it is necessary to re-divide the functional blocks of the sewing machine base, optimize the transmission structure design and the lubrication system, and reasonably allocate the space of the lower part of the base in order to install the corresponding automation structure or direct drive motor, etc. SUMMARY

[0004] The purpose of the present application is to provide a sewing machine with simple structure and low oil consumption.

[0005] The purpose of the present application is achieved by a sewing machine comprising a base, wherein a lifting tooth mechanism, a cloth feeding mechanism, a rotating shuttle mechanism and an oil supply assembly are arranged on the base; a lubricating chamber is arranged on the left side of the base, and the lubricating chamber comprises a first cavity and a second cavity; the first cavity and the second cavity are arranged adjacent to each other and are in communication; a lifting tooth shaft of the lifting tooth mechanism penetrates through the second cavity; a driving gear is sleeved on the lifting tooth shaft in the second cavity; a rotating shuttle shaft of the rotating shuttle mechanism penetrates through the first cavity; a driven gear is sleeved on the rotating shuttle shaft in the first cavity; the driving gear and the driven gear are engaged and rotated, so that the lifting tooth shaft drives the rotating shuttle shaft; a shaft sleeve is installed on the side wall of the first cavity through which the rotating shuttle shaft penetrates, and the rotating shuttle shaft is rotationally arranged in the shaft sleeve; an oil inlet channel, an oil outlet channel and an oil delivery assembly are arranged in the shaft sleeve; the oil inlet channel is communicated with an oil feeding pipe of the oil supply assembly; the oil outlet channel is communicated with an oil return pipe of the oil supply assembly; the rotating shuttle shaft and the oil delivery assembly cooperate to deliver the oil in the oil inlet channel to the oil outlet channel; the oil outlet channel is provided with an auxiliary channel which is communicated to the lubricating chamber.

[0006] According to an embodiment of the present application, the side wall of the lubricating chamber cooperates with the front side wall of the base to form a second mounting groove; a cloth feeding motor of the cloth feeding mechanism is arranged in the second mounting groove; the motor body of the cloth feeding motor is suspended, so that the first cavity extends forward above the cloth feeding motor.

[0007] According to one embodiment of the present invention, the oil supply assembly includes an oil box, an oil supply pipe and an oil return pipe disposed on one side of the oil box; an oil box mounting groove is provided on the right side of the base, and the oil box is installed in the oil box mounting groove; the oil box is fixed on the base, and a cover plate is installed on the oil box, forming an oil storage cavity with the oil box and the cover plate; an oil level indicator is installed in the oil storage cavity, and the oil level indicator floats above the oil in the oil storage cavity; the oil level indicator is provided with an indicator rod, which extends upward and passes through the through holes on the cover plate and the base in sequence.

[0008] According to one embodiment of the present invention, the oil box has an internal placement groove for placing the oil level indicator; the cover plate has a guide post, the oil level indicator has a float, the guide post has a float receiving part for accommodating the float and an indicator rod guiding part for guiding the indicator rod; the guide post is hollow inside, and the height of the float receiving part is greater than or equal to the height of the float.

[0009] According to one embodiment of the present invention, the oil box is provided with an oil delivery groove and an oil delivery hole. The oil delivery groove is located at the bottom of the oil box, the oil delivery hole is located on one side of the oil delivery groove, and the oil delivery pipe is connected to the outside of the oil delivery hole through an oil delivery connector.

[0010] According to an embodiment of the present invention, the feeding mechanism further includes: a crank, a connecting rod, a rotating shaft, a feed tooth holder, and a feed tooth; the crank is rotatably connected to one end of the connecting rod, the rotating shaft is rotatably connected to the other end of the connecting rod, the rotating shaft is rotatably connected to the base, and one end of the feed tooth holder is rotatably connected to the rotating shaft; the feed tooth is placed on the feed tooth holder; the feeding motor is used to drive the crank, the crank drives the connecting rod to swing, and the connecting rod drives the rotating shaft to rotate; thus, the feed tooth holder can move under the drive of the rotating shaft.

[0011] According to an embodiment of the present invention, the tooth lifting mechanism further includes: a tooth lifting shaft and a timing belt, one end of the tooth lifting shaft is connected to the timing belt, and the other end of the tooth lifting shaft is rotatably connected to the tooth seat; the timing belt drives the tooth lifting shaft to rotate, and the tooth lifting shaft drives one end of the tooth seat to swing up and down through the eccentric shaft portion; the other end of the tooth seat is driven by the rotating shaft to swing back and forth.

[0012] According to an embodiment of the present invention, the device further includes a thread-cutting and presser foot-lifting mechanism, which includes a first driving device; the base is further provided with a first mounting groove for mounting the first driving device, the fabric feeding shaft passing through the first mounting groove, and the first driving device being suspended in the first mounting groove, the suspended area being used to avoid the fabric feeding shaft.

[0013] According to one embodiment of the present invention, an oil collection groove is provided on the side wall of the lubrication chamber away from the first cavity.

[0014] According to one embodiment of the present invention, the oil storage tray is provided with an observation window for observing the amount of oil in the lubrication chamber; the oil storage tray is provided with an oil drain port and an oil filling port.

[0015] The outstanding and beneficial technical effects of this invention compared to the prior art are:

[0016] 1. The sewing machine provided by the present invention has a lubrication chamber on the left side of the base, including a first cavity and a second cavity. A bushing is installed on the side wall of the first cavity through which the rotary hook shaft passes. The bushing has an oil inlet channel and an oil outlet channel, which are respectively connected to an oil supply pipe and an oil return pipe. The oil outlet channel has a side channel and leads to the lubrication chamber. This design allows the rotation of the rotary hook shaft to drive the lubricating oil from the oil inlet channel into the rotary hook shaft, and then into the lubrication chamber through the oil outlet channel. This method ensures that only a small amount of lubricating oil is supplied each time, avoiding excessive supply of lubricating oil. Furthermore, the rotary hook shaft is rotatably mounted on the bushing, which has an oil inlet channel, an oil outlet channel, and an oil delivery component. The rotation of the rotary hook shaft provides the oil delivery power, further avoiding unnecessary oil consumption.

[0017] 2. Furthermore, the main body of the fabric feeding motor is suspended in the second mounting slot, and the first cavity extends forward to the top of the fabric feeding motor. This method makes reasonable use of the three-dimensional space, so that the lubrication chamber can accommodate the driven gear on the shuttle shaft.

[0018] 3. Furthermore, the oil supply component also includes an oil box, with an oil level indicator floating above the oil in the oil storage chamber. The indicator rod on the oil level indicator extends upward and passes through the through holes on the cover plate and the base in sequence. The oil level in the oil storage chamber can be determined by observing the height of the indicator rod above the base, thereby determining whether to add or unload oil.

[0019] 4. Furthermore, the cover plate is provided with a guide post, which has a float receiving part and an indicator rod guide part. The indicator rod guide part can limit the shaking of the oil level indicator rod. When the oil is full, the float can enter the float receiving part, which can prevent the upper surface of the float from getting stuck on the bottom surface of the cover plate and failing to accurately reflect the oil level.

[0020] 5. Furthermore, the oil box is equipped with an oil delivery groove, which allows the lubricating oil to have a high and low potential energy difference and automatically gather in the oil delivery groove, so that the lubricating oil is automatically output to the oil delivery pipe through the oil delivery hole.

[0021] 6. The feed shaft is driven by a single motor, making it easier to control the movement of the teeth. Different stitches can be designed and adjusted according to different needs. This simplifies the transmission structure, reduces the number of parts, and thus lowers the failure rate and maintenance costs. In other words, it reduces the structure requiring lubrication, further reducing the space of the lubrication chamber and reducing oil consumption, further reducing costs.

[0022] 7. The wire cutting and pressing foot lifting mechanisms are connected to the same drive device. The first drive device is suspended in the first mounting slot. This suspended area is used to avoid the stepping shaft, thus making better use of the space.

[0023] 8. The lubrication chamber has an oil collection groove. When the machine base is under maintenance, the base is placed vertically on its side, and the oil in the gear chamber is collected in the oil collection groove, making it easier to drain the oil. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a sewing machine according to an embodiment of the present invention.

[0025] Figure 2 This is an exploded view of the structure of a sewing machine according to one embodiment of the present invention.

[0026] Figure 3 This is one of the structural schematic diagrams of the second component in one embodiment of the present invention.

[0027] Figure 4 This is a second schematic diagram of the structure of the second component in one embodiment of the present invention.

[0028] Figure 5 This is a schematic diagram of the base area in one embodiment of the present invention.

[0029] Figure 6 This is one of the structural schematic diagrams of the base in one embodiment of the present invention.

[0030] Figure 7 This is a second schematic diagram of the base structure in one embodiment of the present invention.

[0031] Figure 8 This is one of the cross-sectional views of the base area in one embodiment of the present invention.

[0032] Figure 9 This is a second cross-sectional view of the base area in one embodiment of the present invention.

[0033] Figure 10 This is the third cross-sectional view of the base area in one embodiment of the present invention.

[0034] Figure 11 yes Figure 10 A magnified view of a portion of the image.

[0035] Figure 12 This is another cross-sectional view of the base area in one embodiment of the present invention.

[0036] Figure 13 This is a schematic diagram of the structure of the oil storage component and the base in one embodiment of the present invention.

[0037] Figure 14 This is a schematic diagram of the structure of an oil storage component in one embodiment of the present invention.

[0038] Figure 15 This is a schematic diagram of the structure of the oil box component in one embodiment of the present invention.

[0039] Figure 16 This is an exploded structural diagram of the oil box component in one embodiment of the present invention.

[0040] Figure 17 This is a schematic diagram of the oil box structure in one embodiment of the present invention.

[0041] Symbol explanation:

[0042] 100 - Head section; 200 - Base section; 300 - First component; 400 - Second component; 500 - Oil supply component;

[0043] 210-Base; 310-First drive device; 320-Pressure foot lifting mechanism; 330-Thread cutting mechanism; 410-Second drive device; 420-Fabric feeding mechanism; 430-Rotating shuttle mechanism; 440-Tooth lifting mechanism;

[0044] 211-Lubrication chamber; 2111-First cavity; 2112-Second cavity; 2113-Oil collection groove; 2121-Through hole; 212-Operating platform; 213-Second mounting groove; 214-First mounting groove; 215-Oil box mounting groove; 216-Oil return channel; 217-Regulating valve; 218-Slow flow block;

[0045] 421-Crankshaft; 422-Connecting rod; 423-Shaft; 424-Gear seat; 425-Feeding tooth; 431-Driven gear; 432-Hook shaft; 4321-Hook oil supply line; 433-Hook section; 434-Busset; 4341-Oil inlet channel; 4342-Oil outlet channel; 4343-Auxiliary channel; 441-Drive gear; 442-Gear lifting shaft; 443-Synchronous belt; 444-Eccentric shaft section;

[0046] 50-Oil supply assembly; 51-Oil box component; 510-Oil box; 511-Installation slot; 512-Oil delivery slot; 513-Collection area; 514-Quick oil drain port; 515-Pressure relief port; 516-Oil delivery hole; 517-Oil return hole; 519-Sealing strip mounting slot; 520-Cover plate; 521-Guide column; 522-Oil line outlet; 530-Oil indicator; 540-Oil drain cap; 550-Pressure relief cap; 560-Oil delivery connector; 570-Oil return connector; 580-Plug; 590-Sealing strip; 52-Oil delivery pipe; 53-Oil return pipe; 54-Oil storage tray; 541-Observation window; 542-Oil drain port; 543-Oil filling port; 5211-Buoy housing; 5212-Indicator rod guide; 500-Oil delivery assembly. Implementation

[0047] The foregoing and other technical contents, features, and effects of the present invention will be clearly presented in the detailed description of a preferred embodiment in conjunction with the following accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, back, inside, or outside, are merely for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the present invention.

[0048] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0049] Reference Figures 1 to 10 The sewing machine includes a head area 100 and a base area 200. The base area is provided with a base 210. On the side of the base 210 away from the head area 100, there are: a first component 300, a second component 400, and an oil supply component 50. The first component 300 includes: a first drive device 310, a presser foot lifting mechanism 320, and a thread cutting mechanism 330. The second component 400 includes: a second drive device 410, a fabric feeding mechanism 420, a rotary hook mechanism 430, and a dog lifting mechanism 440. The presser foot lifting mechanism 320 and the thread cutting mechanism 330 are existing technologies and will not be described in detail here. The functions and roles of the fabric feeding mechanism 420, the rotary hook mechanism 430, and the dog lifting mechanism 440 are also existing technologies and will not be described in detail here.

[0050] In this embodiment, it is particularly important to note that, referring to Figure 8 and Figure 9 A lubrication chamber 211 is provided on the left side of the base. The lubrication chamber 211 includes a first cavity 2111 and a second cavity 2112. The first cavity 2111 and the second cavity 2112 are arranged adjacently and connected. The lifting shaft 442 of the lifting mechanism 440 passes through the second cavity 2112. A drive gear 441 is mounted on the lifting shaft 442 in the second cavity 2112. The shuttle shaft 432 of the rotary mechanism 430 passes through the first cavity 2111. A driven gear 431 is mounted on the shuttle shaft 432 in the first cavity 2111. The drive gear 441 and the driven gear 431 mesh and rotate, causing the lifting shaft 442 to drive the shuttle shaft 432. (Refer to...) Figure 10 and Figure 11A bushing 434 is installed on the side wall of the first cavity 2111 through which the rotary shuttle shaft 432 passes, and the rotary shuttle shaft 432 is rotatably disposed within the bushing 434. The bushing 434 contains an oil inlet channel 4341, an oil outlet channel 4342, and an oil supply assembly 500. The oil inlet channel 4341 is connected to the oil delivery pipe 52 of the oil supply assembly 50; the oil outlet channel 4342 is connected to the oil return pipe 53 of the oil supply assembly 50. The rotary shuttle shaft 432 and the oil supply assembly 500 cooperate to transport the oil in the oil inlet channel 4341 to the oil outlet channel 4342. The oil outlet channel 4342 is provided with an auxiliary channel 4343, which leads to the lubrication chamber 211, thus connecting the oil outlet channel 4342 to the lubrication chamber 211. The lubrication chamber 211 occupies a small space while still lubricating necessary components, providing space for the installation of other mechanisms or the feeding motor 410.

[0051] Furthermore, refer to Figure 10 and Figure 11 Lubricating oil enters the oil inlet channel 4341 of the bushing 434 from the oil supply pipe 52. Under the combined action of the rotation of the rotary hook shaft 442 and the oil delivery assembly 500, the lubricating oil is drawn into the oil outlet channel 4342 of the bushing 434. This method of providing oil delivery power through the rotation of the rotary hook shaft 432 further avoids unnecessary oil consumption.

[0052] Figure 12 yes Figure 5 A cross-sectional view along the dashed line AA.

[0053] Furthermore, refer to Figure 12 After passing through the oil outlet channel 4342, the lubricating oil flows into the oil return channel 216, which is located on the base 210. One end of the oil return channel 216 is connected to the oil outlet channel 4342, and the other end is connected to the oil return pipe 53. A regulating valve 217 is installed on the side of the oil return channel 216 to regulate the flow rate of the lubricating oil entering the oil return pipe 53. A flow buffer 218 is provided inside the oil return channel 216 near the oil return pipe 53, allowing liquid lubricating oil to pass through the flow buffer. Block 218, made of sponge, enhances the evaporation of lubricating oil, producing atomized lubricating oil. The rotary hook shaft 432 also features a rotary hook oil supply line 4321, one end of which connects to the oil outlet channel 4342. Due to the action of the regulating valve 217 and the buffer block 218, the lubricating oil is appropriately retained and atomized in the return oil channel 216. The atomized lubricating oil then enters the rotary hook oil supply line 4321, thereby lubricating other parts of the rotary hook shaft. This atomization method prevents liquid lubricating oil from entering the rotary hook area, thus avoiding fabric saturation.

[0054] Reference Figures 5 to 7The side wall of the lubrication chamber 211 mates with the front side wall of the base 210 to form a second mounting groove 213; the feeding motor 410 of the feeding mechanism 420 is located within the second mounting groove 213; see reference. Figure 9 and Figure 10 The motor body of the fabric feeding motor 410 is suspended in the air, so that the first cavity 2111 extends forward to above the fabric feeding motor 410.

[0055] Reference Figures 2 to 4 The rotary shuttle mechanism 430 includes a driven gear 431, and the tooth-lifting mechanism 440 includes a driving gear 441. The driven gear 431 meshes with the driving gear 441 for transmission. The tooth-lifting mechanism 440 transmits power to the rotary shuttle mechanism 430 through the two gears. The second drive device 410 provides driving force to the fabric feeding mechanism 420. The fabric feeding mechanism 420 includes a crank 421, a connecting rod 422, a rotating shaft 423, a tooth holder 424, and a fabric feeding tooth 425. The crank 421 and... One end of the connecting rod 422 is rotatably connected, and the other end of the rotating shaft 423 is rotatably connected to the connecting rod 422. The rotating shaft 423 is rotatably connected to the base 210. One end of the tooth holder 424 is rotatably connected to the rotating shaft 423. The feed tooth 425 is placed on the tooth holder 424. The second drive device 410 is used to drive the crank 421. The crank 421 drives the connecting rod 422 to swing, and the connecting rod 423 drives the rotating shaft 423 to rotate. As a result, the tooth holder 424 can move under the drive of the rotating shaft 423.

[0056] The tooth lifting mechanism 440 also includes a tooth lifting shaft 442 and a timing belt 443. The drive gear 441 is mounted on the tooth lifting shaft 442. One end of the tooth lifting shaft 442 is connected to the timing belt 443, and the other end of the tooth lifting shaft 442 is rotatably connected to the other end of the tooth holder 424. The timing belt 443 drives the tooth lifting shaft 442 to rotate, and the stepping shaft 422 drives the tooth holder 424 to swing. That is, one end of the tooth holder 424 is connected to the rotating shaft 423, and the other end is connected to the tooth lifting shaft 442. The tooth holder 424 forms a feeding trajectory under the combined action of the rotating shaft 423 and the tooth lifting shaft 442.

[0057] Furthermore, refer to Figure 3 and Figure 4 The tooth lifting shaft 442 drives one end of the tooth holder 424 to swing up and down through the eccentric shaft 444; the other end of the tooth holder 424 is driven by the rotating shaft 423 to swing back and forth.

[0058] In practical applications, the feed dog trajectory can be adjusted more easily to meet different needs. This simplifies the transmission structure, reduces the number of parts, and consequently lowers the failure rate and maintenance costs. Furthermore, the reduction in lubrication requirements further reduces the space needed for the lubrication chamber, lowering oil consumption and further reducing costs.

[0059] In one embodiment of the present invention, the first driving device 310 and the second driving device 410 may be servo motors, but the present invention is not limited to this one embodiment.

[0060] Reference Figure 2 The sewing machine also includes an oil supply assembly 50, which comprises an oil box 510 and an oil storage tray 540. The oil box 510 supplies lubricating oil to the lubrication chamber 211. The lubrication chamber 211 is an open-end receiving cavity, and the oil storage tray 540 covers the opening of the lubrication chamber 211 to store lubricating oil. The oil supply assembly 50 also includes an oil supply pipe 52 and an oil return pipe 53. The oil supply pipe 52 supplies oil to the lubrication chamber 211. The oil box and the lubrication chamber are designed separately, meaning the oil box is set up independently. This avoids excessive lubricating oil from soaking the transmission gears, shuttle gear, and feed gear, which would create resistance to gear movement. The oil box 510 is located in a corner of the base, which reduces the occupied area while ensuring lubrication, and does not affect the installation of the timing belt, lifting pinion, thread cutting, and presser foot lifting mechanisms.

[0061] Reference Figures 5 to 7 The base 210 is also provided with a first mounting groove 214, a second mounting groove 413, and an oil box mounting groove 215. The first mounting groove 214 is used to install the first drive device 310, and the feed shaft 425 passes through the first mounting groove 214. That is to say, the first drive device 310 is suspended in the first mounting groove 214, and this suspended area is used to avoid the feed shaft 425. The second mounting groove 213 is used to install the second drive device 410. The oil delivery pipe 520 passes through the second mounting groove 215. The mounting groove 213 is connected to the first cavity 2111, and the connection point is located on the side wall of the first cavity 2111; the oil return pipe 530 is used to send excess lubricating oil from the lubrication chamber 211 back to the oil box 510. The oil return pipe is connected to the first cavity 2111, and the connection point is located on the bottom wall of the first cavity 2111. That is to say, there is a cavity between the second drive device 410 and the bottom of the second mounting groove 213, and the internal oil delivery pipe 520 passes through the cavity and is connected to the first cavity 2111.

[0062] In one embodiment of the present invention, the second driving device is a motor. The main body of the motor is a cube shape with a length of 60mm, a width of 60mm, and a height of 96mm. The above is only one embodiment of the present invention, and the present invention is not limited thereto.

[0063] Reference Figure 8 and Figure 9An operating table 212 is provided on the side of the base 210 near the head area 100. The distance between the first cavity 2111 and the operating table 212 is less than the distance between the second drive device 410 and the operating table 212. That is to say, the second mounting groove 213 has a shape with a large opening and a small bottom; the lubrication chamber 211 has a shape with a small opening and a large internal space; this design makes the space more compact and maximizes the use of space.

[0064] Reference Figure 1 and Figure 5 The oil reservoir 540 is equipped with an observation window 541 for observing the oil level in the lubrication chamber 211. This helps to monitor oil consumption and allow for timely refilling. The oil reservoir 540 has an oil drain port 542 and an oil filling port 543. When there is too much oil in the lubrication chamber, the drain port can be opened to drain the oil, further preventing excessive lubricating oil from soaking the transmission gears, shuttle gears, and feed gears, which would create resistance to gear movement. The oil filling port 543 allows for the filling of oil into the lubrication chamber, preventing wear on the transmission gears when there is no lubricating oil in the lubrication chamber 211 for initial use. Furthermore, the oil filling port and the oil drain port are equipped with caps, which can be turned to open the oil filling port or the oil drain port. The observation window 541 is a transparent clip fixed to the oil reservoir 540.

[0065] Reference Figure 7 An oil collection groove 2113 is provided on the side wall of the lubrication chamber 211 away from the first cavity 2111. When the machine base is under maintenance, the base is placed vertically on its side, and the oil in the gear chamber collects in the oil collection groove, making it easier to drain the oil. The oil drain port 542 is located at the position of the oil collection groove 2113. The oil collects in the oil collection groove, and the oil can be drained by opening the oil drain port 542.

[0066] Reference Figures 13 to 17 The oil supply assembly 50 includes: an oil box component 51, an oil supply pipe 52, and an oil return pipe 53; the oil box component 51, fixed on the base 210, includes an oil box 510, a cover plate 520, and an oil level indicator 530; the cover plate 520 is fitted to the opening of the oil box 510 to form an oil storage cavity; the oil supply pipe 520 is located on one side of the oil box 510 and connects to the oil storage cavity for supplying oil to the outside; the oil return pipe 530 is located on one side of the oil box 510 and connects to the oil storage cavity for receiving the returned oil; the oil return pipe 530 is located above the oil supply pipe 520; the oil level indicator 530 is located in the oil storage cavity and floats above the oil; the oil level indicator 570 is provided with an indicator rod 531, which extends upward and passes through the cover plate 560 and the through hole 2121 on the base 210 in sequence.

[0067] Reference Figure 16 and Figure 17The oil box 510 has an internal mounting slot 511 for holding the oil level indicator 530. The cover plate 520 has a guide post 521. The oil level indicator 530 has a float 532. The guide post 521 has a float receiving portion 5211 for accommodating the float 532 and an indicator rod guide portion 5212 for guiding the indicator rod 531. The guide post 521 is hollow inside, and the height H1 of the float receiving portion 5211 is greater than or equal to the height H2 of the float 532. The oil box 510 has an oil delivery groove 512 and an oil delivery hole 516. The oil delivery groove 512 is located at the bottom of the oil box 510, and the oil delivery hole 516 is located on one side of the oil delivery groove 512. An oil delivery pipe 52 is connected to the outside of the oil delivery hole 516 via an oil delivery connector 560. The oil box component 51 also includes a sealing strip 590; the sealing strip 590 is disposed between the oil box 510 and the cover plate 520, and the shape of the sealing strip 590 is adapted to the shape of the opening of the oil box 510. A sealing strip mounting groove 519 is provided at the opening of the oil box 510, and the sealing strip 590 is installed in the sealing strip mounting groove 519. The oil box 510 is provided with a quick-drain port 514 and a pressure relief port 515; the quick-drain port 514 is located at the bottom of the oil box 510, and a drain cap 540 is installed on the quick-drain port 514; the pressure relief port 515 is located on the upper part of the side wall of the oil box 510, and a pressure relief cap 550 is installed on the pressure relief port 515. A collection area 513 is provided on the side of the oil box 510, the quick-drain port 514 is located in the collection area 513, and the pressure relief port 515 is located on the sewing side away from the collection area 513. The cover plate 520 is provided with an oil line outlet 522 and a plug 580; the oil line to be installed passes through the oil line outlet 522, so that the lubricating oil in the oil box 510 is transported along the oil line to other transmission mechanisms; the plug 580 is used to clamp the tail end of the oil line to prevent the oil line from being pulled out and detached from the lubrication cavity in the oil box 510.

[0068] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the implementation of the technology of the present invention in any way, nor are they intended to limit the scope of protection of the present invention. Any person skilled in the art can make some modifications or alterations to other equivalent embodiments without departing from the scope of the technical means disclosed in the present invention, and such modifications or alterations should still be regarded as the same technology or embodiments as the present invention. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A sewing machine, comprising a base (210), on which a toothing mechanism (440), a fabric feeding mechanism (420), a rotary hook mechanism (430), and an oil supply assembly (50) are disposed; characterized in that, A lubrication chamber (211) is provided on the left side of the base. The lubrication chamber (211) includes a first cavity (2111) and a second cavity (2112). The first cavity (2111) and the second cavity (2112) are arranged adjacent to each other and are connected. The tooth-lifting mechanism (440) has a tooth-lifting shaft (442) that passes through the second cavity (2112); a drive gear (441) is fitted on the tooth-lifting shaft (442) inside the second cavity (2112). The shuttle shaft (432) of the shuttle mechanism (430) passes through the first cavity (2111); a driven gear (431) is fitted on the shuttle shaft (432) in the first cavity (2111); the driving gear (441) and the driven gear (431) mesh and rotate, so that the lifting tooth shaft (442) drives the shuttle shaft (432). A bushing (434) is installed on the side wall of the first cavity (2111) through which the rotary shuttle shaft (432) passes. The rotary shuttle shaft (432) is rotatably disposed within the bushing (434). An oil inlet channel (4341), an oil outlet channel (4342), and an oil delivery assembly (500) are provided within the bushing (4341). The oil inlet channel (4341) is connected to the oil delivery pipe (52) of the oil delivery assembly (50). The oil outlet channel (4342) is connected to the oil return pipe (53) of the oil delivery assembly (50). The rotary shuttle shaft (432) and the oil delivery assembly (500) cooperate to deliver the oil in the oil inlet channel (4341) to the oil outlet channel (4342). The oil outlet channel (4342) is provided with an auxiliary channel (4343), which leads to the lubrication chamber (211). The base (210) is provided with an oil return channel (216). One end of the oil return channel (216) is connected to the oil outlet channel (4342) and the other end is connected to the oil return pipe (53). A regulating valve (217) is installed on the side of the oil return channel (216). The regulating valve (217) is used to regulate the flow rate of the lubricating oil entering the oil return pipe (53). A flow buffer block (218) is provided in the oil return channel (216) near the oil return pipe (53). The flow buffer block (218) is used to allow liquid lubricating oil to pass through. The lubricating oil will increase its evaporation effect here and produce atomized lubricating oil. The rotary shaft (432) is also provided with a rotary oil supply pipeline (4321), one end of which is connected to the oil outlet channel (4342).

2. A sewing machine according to claim 1, characterized in that, The side wall of the lubrication chamber (211) and the front side wall of the base (210) cooperate to form a second mounting groove (213); the feeding motor (410) of the feeding mechanism (420) is located in the second mounting groove (213); the motor body of the feeding motor (410) is suspended, so that the first cavity (2111) extends forward to the top of the feeding motor (410).

3. A sewing machine according to claim 1, characterized in that, The oil supply assembly (50) includes an oil box (510), an oil supply pipe (52) and an oil return pipe (53) disposed on one side of the oil box (510); An oil box mounting groove (215) is provided on the right side of the base, and an oil box (510) is installed in the oil box mounting groove (215); the oil box (510) is fixed on the base (210), and a cover plate (520) is installed on the oil box (510), forming an oil storage cavity with the oil box (510) and the cover plate (520); an oil level indicator (530) is installed in the oil storage cavity. The oil level indicator (530) floats above the oil in the oil storage chamber; the oil level indicator (530) is provided with an indicator rod (531), which extends upward and passes through the through hole (2121) on the cover plate (520) and the base (210) in sequence.

4. A sewing machine according to claim 3, characterized in that, The oil box (510) has a mounting slot (511) inside for placing the oil gauge (530); the cover plate (520) has a guide post (521), the oil gauge (530) has a float (532), the guide post (521) has a float receiving part (5211) that can accommodate the float (532) and an indicator rod guiding part (5212) for guiding the indicator rod (531); the guide post (521) is hollow inside, and the height of the float receiving part (5211) is greater than or equal to the height of the float (532).

5. A sewing machine according to claim 3, characterized in that, The oil box (510) is provided with an oil delivery groove (512) and an oil delivery hole (516). The oil delivery groove (512) is located at the bottom of the oil box (510), the oil delivery hole (516) is located on one side of the oil delivery groove (512), and the oil delivery pipe (52) is connected to the outside of the oil delivery hole (516) through an oil delivery connector (560).

6. A sewing machine according to claim 2, characterized in that, The feeding mechanism (420) further includes: a crank (421), a connecting rod (422), a rotating shaft (423), a toothed seat (424), and a feeding tooth (425). The crank (421) is rotatably connected to one end of the connecting rod (422), and the shaft (423) is rotatably connected to the other end of the connecting rod (422). The shaft (423) is rotatably connected to the base (210), and one end of the feed dog (424) is rotatably connected to the shaft (423). The feed dog (425) is placed on the feed dog (424). The feed motor (410) is used to drive the crank (421). The crank (421) drives the connecting rod (422) to swing, and the connecting rod (422) drives the shaft (423) to rotate. As a result, the feed dog (424) can move under the drive of the shaft (423).

7. A sewing machine according to claim 6, characterized in that, The tooth lifting mechanism (440) further includes: a tooth lifting shaft (442) and a timing belt (443). One end of the tooth lifting shaft (442) is connected to the timing belt (443), and the other end of the tooth lifting shaft (442) is rotatably connected to the tooth seat (424). The timing belt (443) drives the tooth lifting shaft (442) to rotate, and the tooth lifting shaft (442) drives one end of the tooth seat (424) to swing up and down through the eccentric shaft (444). The other end of the tooth seat (424) is driven by the rotating shaft (423) to swing back and forth.

8. A sewing machine according to claim 1, characterized in that, It also includes a wire cutting and presser foot lifting mechanism (300), which includes a first drive device (310); the base (210) is further provided with a first mounting groove (214) for mounting the first drive device (310). The tooth lifting shaft (442) passes through the first mounting groove (214), and the first drive device (310) is suspended in the first mounting groove (214). The suspended area is used to avoid the tooth lifting shaft (442).

9. A sewing machine according to claim 1, characterized in that, An oil collection groove (2113) is provided on the side wall of the lubrication chamber (211) away from the first cavity (2111).

10. A sewing machine according to claim 3, characterized in that, The oil supply assembly (50) also includes an oil storage tray (54), which has an observation window (541) for observing the amount of oil in the lubrication chamber (211); the oil storage tray (54) has an oil drain port (542) and an oil filling port (543).

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