Sewing machine with easily replaceable presser foot

Abstract

The application relates to a sewing machine facilitating maintenance of a presser foot, and relates to the technical field of sewing machines, which comprises a shell, a quick-release mechanism is fixedly connected to the top of the shell, a lubricating mechanism is slidably connected to the inner wall of the shell, a lifting mechanism is fixedly connected to the inner wall of the shell, a sliding mechanism is fixedly connected to the inner wall of the shell, the quick-release mechanism comprises a supporting column, the outer portion of the supporting column is fixedly connected to the inner wall of the shell, the bottom of the supporting column is fixedly connected with a fixing ring, the inner wall of the fixing ring is rotatably connected with a connecting ring, the outer portion of the connecting ring is fixedly connected with a sliding column, and the bottom of the connecting ring is slidably connected with a connecting rod one. The application has the advantages that when the presser foot surface is used for a long time against weather-resistant high-toughness anti-aging leather fabric, the presser foot can be damaged, when the presser foot is damaged, the sliding sliding column drives the connecting ring to rotate, the limiting block is rotated to release the fixation on the connecting rod one, and the production efficiency is greatly improved.

Description

Technical Field

[0001] This application relates to the field of sewing machine technology, and in particular to a sewing machine with an easy-to-maintain presser foot. Background Technology

[0002] A sewing machine with an easy-to-maintain presser foot is a device that uses mechanical transmission or electronic control to drive the needle to pierce the fabric with a thread, and works with mechanisms such as a shuttle to achieve stitching. Its core components include a needle bar, feed dog, and transmission system. Modern models also incorporate electronic control systems to enhance automation. Its main function is to tightly connect various fabrics, leathers, and other materials with sewing threads, enabling garment making, home textile processing, and industrial product sewing.

[0003] A search revealed Chinese Patent Publication No. CN222834537U, which discloses a dual-motor driven sewing machine. The machine includes a body and a sewing head located at its upper end. A first motor is mounted on the side of the sewing head. A groove is formed at the upper end of the machine body behind the needle at the bottom of the sewing head, and a material guiding mechanism is installed within the groove. This material guiding mechanism is driven by a second motor. A material supporting mechanism, which works in conjunction with the material guiding mechanism, is located at the bottom of the machine body to support the sewn garment. This application utilizes the groove behind the needle at the upper end of the machine body. The second motor is activated simultaneously with sewing, causing the conveyor belt to move to one side and transport the sewn garment, preventing wrinkles at the needle end. The material supporting mechanism at the lower end of the machine body allows the supporting plate to be pushed outwards during sewing, supporting the garment transported by the material guiding mechanism and preventing it from falling to the ground.

[0004] The beneficial effects mentioned in the aforementioned patent specification include "a material support mechanism for supporting sewn garments and preventing garments and materials from falling to the ground." While the aforementioned patent is convenient to collect, it does not allow for quick replacement of the presser foot when it is damaged, thus affecting usage time. Therefore, a sewing machine with a presser foot that is easy to repair is proposed. Utility Model Content

[0005] The purpose of this application is to provide a sewing machine that facilitates the repair of the presser foot, addressing the problem of the inability to quickly replace a damaged presser foot, which affects the machine's lifespan.

[0006] The sewing machine for easy maintenance of the presser foot provided in this application adopts the following technical solution: a sewing machine for easy maintenance of the presser foot includes a housing, a quick-release mechanism is fixedly connected to the top of the housing, a lubrication mechanism is slidably connected to the inner wall of the housing, a lifting mechanism is fixedly connected to the inner wall of the housing, and a sliding mechanism is fixedly connected to the inner wall of the housing.

[0007] The quick-release mechanism includes a support column, the support column is fixedly connected to the inner wall of the housing, a fixing ring is fixedly connected to the bottom of the support column, a connecting ring is rotatably connected to the inner wall of the fixing ring, a sliding column is fixedly connected to the outside of the connecting ring, a connecting rod is slidably connected to the bottom of the connecting ring, a pressure foot is fixedly connected to the other end of the connecting rod, a limit groove is formed on the outside of the connecting rod, and a limit assembly is fixedly connected to the outside of the fixing ring.

[0008] Through the above technical solution: the quick-release mechanism uses the support column and the fixed ring to build a stable base, and drives the connecting ring to rotate through the sliding column, so that the limit component can quickly lock and unlock the connecting rod one, realizing the non-destructive replacement of the presser foot. This design improves the efficiency of traditional presser foot replacement, and the precise cooperation between the limit groove and the limit component ensures the positioning accuracy of the presser foot, which significantly improves the adaptability and reliability of the equipment, and is especially suitable for multi-variety, small-batch production scenarios.

[0009] Preferably, the lubrication mechanism includes a cylinder, the top of which is fixedly connected to the inner wall of the housing, a needle rod slidably connected to the other end of the cylinder, an oil reservoir fixedly connected to the outside of the cylinder, a plurality of oil outlets being provided on the inner wall of the oil reservoir, a ball bearing slidably connected to the outside of the needle rod, an oil inlet fixedly connected to the outside of the oil reservoir, and a cover movably connected to the outside of the oil inlet.

[0010] By adopting the above technical solution, the lubrication mechanism realizes the dynamic self-lubrication function of the needle bar. The oil reservoir is connected to the needle bar through the oil outlet. When the needle bar slides in the cylinder, the rolling of the balls evenly coats the contact surface with lubricating oil, forming a thick oil film. This design reduces the resistance of the needle bar movement and the temperature rise. A single oil injection can support continuous operation, significantly extending the service life of key components.

[0011] Preferably, the lifting mechanism includes a motor, the motor being externally fixedly connected to the inner wall of the housing, a semicircle being fixedly connected to the drive end of the motor, a follower plate being rotatably connected to the outside of the semicircle, a connecting rod being fixedly connected to the outside of the follower plate, and an adjusting plate being fixedly connected to the other end of the connecting rod.

[0012] By adopting the above technical solution, the lifting mechanism achieves high-precision motion control of the needle bar. Motor 1 drives the semi-circular rotation, and the circular motion is converted into the linear displacement of the adjusting plate through the follower plate and connecting rod 2, thereby driving the needle bar to complete the up-and-down reciprocating motion.

[0013] Preferably, the adjusting plate is rotatably connected to a support column, and the other end of the support column is fixedly connected to the inner wall of the housing.

[0014] By adopting the above technical solution, the column and the adjusting plate form a stable lever fulcrum system. When the semicircle rotates, the adjusting plate swings around the column at an angle, and its end slider slides in the dovetail groove on the outer wall of the shell, effectively improving sewing accuracy and stability.

[0015] Preferably, the limiting component includes a fixing post, both ends of which are fixedly connected to the inner wall of the fixing ring. A spring is fixedly connected to the outside of the fixing post, and a connecting post is fixedly connected to the other end of the spring. The other end of the connecting post is fixedly connected to the outer wall of the connecting ring. A limiting block is rotatably connected to the outside of the connecting ring, and a positioning post is rotatably connected to the other end of the limiting block. The other end of the positioning post is fixedly connected to the inner wall of the fixing ring.

[0016] By adopting the above technical solution, the limiting component realizes the quick locking and releasing of the presser foot. When the sliding column drives the connecting ring to rotate, the connecting column stretches the spring, and the limiting block rotates around the positioning column and disengages from the limiting groove, realizing the quick release of the presser foot. The spring ensures that the limiting block and the limiting groove effectively prevent the presser foot from loosening during sewing, significantly improving the reliability of the equipment.

[0017] Preferably, a second motor is fixedly connected to the inner wall of the sliding mechanism, a driven plate is fixedly connected to the drive end of the second motor, and a feeding tooth is rotatably connected to the outside of the driven plate.

[0018] By adopting the above technical solution, the sliding mechanism achieves precise transmission of the feed teeth. The motor drives the driven plate to make eccentric motion, which directly drives the feed teeth to slide back and forth. This design simplifies the transmission chain and effectively improves the stability of fabric conveying and sewing quality.

[0019] Preferably, a limiting block is rotatably connected to the inner wall of the housing, and a sliding groove is slidably connected to the outside of the limiting block, with the other end of the sliding groove fixedly connected to the outside of the feeding tooth.

[0020] By adopting the above technical solution and using a combination structure of limiting block and slide groove, the circumferential motion of the driven plate is accurately converted into the linear reciprocating motion of the feed tooth, and the cylindrical surface of the limiting block and the slide groove form a rolling friction pair.

[0021] Preferably, the other end of the follower plate is fixedly connected to the outside of the needle rod, and the outside of the adjustment plate is slidably connected to the outside of the housing.

[0022] By adopting the above technical solution, the semi-circular rotational motion can be efficiently converted into the vertical motion of the needle bar by directly connecting the follower plate to the needle bar. The external design of the adjustment plate allows operators to significantly improve the maintainability and adaptability of the equipment without disassembling the housing.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. In this utility model, when the presser foot is exposed to weather-resistant, high-toughness, and anti-aging leather material for a long time, it will be damaged. When the presser foot is damaged, the sliding column drives the connecting ring to rotate, which causes the limiting block to rotate and release the fixing of the connecting rod, making it convenient to replace the presser foot and greatly improving production efficiency.

[0025] 2. In this utility model, when the motor rotates, it drives the semicircle to rotate, causing the follower plate to move and the needle bar to move up and down. When the needle bar moves, it passes over the oil reservoir and drives the ball bearings to rotate, causing the lubricating oil on the inner wall of the oil reservoir to slide out, which facilitates better movement of the needle bar and does not affect its use. This lubrication method can effectively reduce the frictional resistance of the needle bar during the movement process, reduce energy loss, reduce wear, and extend the service life of the needle bar. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a sewing machine with a presser foot that is easy to maintain, as proposed in this utility model.

[0027] Figure 2 This is a schematic diagram of the housing of a sewing machine with a presser foot that is easy to maintain, as proposed in this utility model.

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0030] Figure 5 for Figure 2 Enlarged view of point C in the middle;

[0031] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Quick-release mechanism; 3. Lubrication mechanism; 4. Lifting mechanism; 5. Sliding mechanism; 21. Fixed ring; 22. Connecting ring; 23. Sliding column; 24. Limiting component; 241. Fixed column; 242. Spring; 243. Connecting column; 244. Limiting block; 245. Positioning column; 25. Connecting rod one; 26. Limiting groove; 27. Support column; 28. Presser foot; 31. Cylinder; 32. Oil reservoir; 33. Oil outlet; 34. Needle bar; 35. Ball bearing; 36. Oil inlet; 37. Cover; 41. Motor one; 42. Semicircle; 43. Support column; 44. Follower plate; 45. Connecting rod two; 46. Adjusting plate; 51. Motor two; 52. Driven plate; 53. Limiting block; 54. Sliding groove; 55. Feeding tooth. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1 -Appendix Figure 5 This application will be described in further detail below.

[0033] Example: A sewing machine with an easy-to-maintain presser foot, see reference. Figures 1 to 3 The sewing machine includes a housing 1, with a quick-release mechanism 2 fixedly connected to the top of the housing 1. This quick-release mechanism 2 enables the rapid disassembly and replacement of the presser foot 28, greatly improving the adaptability and maintenance efficiency of a sewing machine that is easy to maintain the presser foot when facing different fabrics. A lubrication mechanism 3 is slidably connected to the inner wall of the housing 1. This lubrication mechanism 3 provides continuous lubrication to the needle bar 34 during the operation of the sewing machine, effectively reducing frictional resistance, reducing wear, and extending the service life of the needle bar 34. A lifting mechanism 4 is fixedly connected to the inner wall of the housing 1. The lifting mechanism 4 can precisely control the up and down movement of the needle bar 34 to ensure the stability and accuracy of the sewing process. A sliding mechanism 5 is fixedly connected to the inner wall of the housing 1. The sliding mechanism 5 is responsible for the smooth movement of the feed dog 55, ensuring the uniformity of fabric feeding, thereby improving the sewing quality. The quick-release mechanism 2 includes a support column 27, which is externally fixedly connected to the inner wall of the housing 1 to provide stable support for the entire quick-release mechanism 2.

[0034] A fixing ring 21 is fixedly connected to the bottom of the support column 27. A connecting ring 22 is rotatably connected to the inner wall of the fixing ring 21. The rotation of the connecting ring 22 provides an operating basis for the disassembly and installation of the presser foot 28. A sliding column 23 is fixedly connected to the outside of the connecting ring 22. The sliding column 23 serves as an operating component, allowing the user to manually control the rotation of the connecting ring 22. A connecting rod 25 is slidably connected to the bottom of the connecting ring 22. The other end of the connecting rod 25 is fixedly connected to the presser foot 28. The connecting rod 25 transmits the movement of the connecting ring 22 to the presser foot 28, enabling the disassembly and installation of the presser foot 28. A limiting groove 26 is provided on the outside of the connecting rod 25. A limiting component 24 is fixedly connected to the outside of the fixing ring 21. The limiting groove 26 and the limiting component 24 cooperate to achieve a stable fixation of the presser foot 28, ensuring that the presser foot 28 will not loosen during the sewing process.

[0035] The limiting component 24 includes a fixed post 241, both ends of which are fixedly connected to the inner wall of the fixed ring 21, providing a fixed base for the entire limiting component 24. A spring 242 is fixedly connected to the outside of the fixed post 241, and a connecting post 243 is fixedly connected to the other end of the spring 242. The elasticity of the spring 242 allows the connecting post 243 to move under force and return to its original position after the force is removed. The other end of the connecting post 243 is fixedly connected to the outer wall of the connecting ring 22, connecting the movement of the connecting ring 22 with the elasticity of the spring 242. A limiting block 244 is rotatably connected to the outside of the connecting ring 22, and the other end of the limiting block 244... A positioning post 245 is rotatably connected, and the other end of the positioning post 245 is fixedly connected to the inner wall of the fixed ring 21. The limiting block 244 cooperates with the positioning post 245 to limit and position the rotation angle of the connecting ring 22, thereby ensuring that the limiting component 24 can accurately fix and release the connecting rod 25. A motor 51 is fixedly connected to the inner wall of the sliding mechanism 5. A driven plate 52 is fixedly connected to the drive end of the motor 51. The motor 51 provides power to the sliding mechanism 5, and its rotation drives the driven plate 52 to move. A feeding tooth 55 is rotatably connected to the outside of the driven plate 52. The movement of the driven plate 52 is transmitted to the feeding tooth 55, so that the feeding tooth 55 realizes the sliding feeding action.

[0036] Specifically, the various mechanisms work together to achieve significant practical results. The advantages of the quick-release mechanism 2 are particularly evident when operators are dealing with special fabrics such as weather-resistant, high-toughness, and anti-aging leather. By gently pushing the slide column 23, the connecting ring 22 rotates within the fixed ring 21, causing the connecting column 243 to stretch the spring 242, which in turn causes the limiting block 244 to rotate around the positioning column 245, thereby releasing the lock on the connecting rod 25. This process takes only a few seconds to complete the removal of the presser foot 28. After replacing it with a suitable presser foot 28, the slide column 23 is operated in reverse, and the rebound force of the spring 242 causes the limiting component 24 to quickly engage with the limiting groove 26, ensuring the presser foot 28 is stable and reliable, greatly improving fabric adaptability and maintenance efficiency.

[0037] Reference Figure 2 and Figure 4The lubrication mechanism 3 includes a cylinder 31. The top of the cylinder 31 is fixedly connected to the inner wall of the housing 1, providing fixed support for the entire lubrication mechanism 3. A needle bar 34 is slidably connected to the other end of the cylinder 31. The sliding of the needle bar 34 within the cylinder 31 realizes the sewing action. An oil reservoir 32 is fixedly connected to the outside of the cylinder 31. The oil reservoir 32 stores lubricating oil, providing a continuous oil source for the lubrication of the needle bar 34. The inner wall of the oil reservoir 32 has multiple oil outlets 33, which allow the lubricating oil in the oil reservoir 32 to flow out smoothly and act on the needle bar 34. A ball bearing 35 is slidably connected to the outside of the needle bar 34. When the needle bar 34 moves, the ball bearing 35 rotates accordingly, which not only helps to better distribute the lubricating oil on the surface of the needle bar 34, but also further reduces the friction between the needle bar 34 and the cylinder 31. The external fixed connection of the lifting mechanism 34 includes an oil inlet 36, and an external movable connection of the oil inlet 36 includes a cover 37. The oil inlet 36 allows the user to add lubricating oil to the oil storage tank 32, while the cover 37 prevents lubricating oil leakage. The lifting mechanism 4 includes a motor 41, which is externally fixedly connected to the inner wall of the housing 1 to provide power to the lifting mechanism 4. A semicircle 42 is fixedly connected to the drive end of the motor 41. The rotation of the motor 41 drives the semicircle 42 to rotate. A follower plate 44 is rotatably connected to the outside of the semicircle 42. The rotation of the semicircle 42 causes the follower plate 44 to move. A connecting rod 45 is fixedly connected to the outside of the follower plate 44. An adjusting plate 46 is fixedly connected to the other end of the connecting rod 45. The movement of the follower plate 44 is transmitted to the adjusting plate 46 through the connecting rod 45, thereby achieving precise control of the lifting of the needle bar 34.

[0038] Specifically, during the sewing process, motor 41 drives the semicircle 42 to rotate, and the follower plate 44, supported by the support column 43, drives the needle bar 34 to reciprocate up and down. At this time, the lubrication mechanism 3 plays a crucial role. As the needle bar 34 moves, it drives the ball bearings 35 to roll, evenly spreading the lubricating oil in the oil reservoir 32 onto the surface of the needle bar 34 through the oil outlet 33, forming a friction-reducing protective film. Testing has shown that this lubrication system reduces the frictional resistance of the needle bar 34, decreases wear, and effectively extends the lifespan of the component.

[0039] Reference Figure 1 , Figure 2 and Figure 5An external support column 43 is rotatably connected to the adjusting plate 46. The other end of the support column 43 is fixedly connected to the inner wall of the housing 1. The support column 43 provides support and a fulcrum for the adjusting plate 46, ensuring that the adjusting plate 46 can be stably adjusted in angle, thereby ensuring the smoothness of the lifting and lowering movement of the needle bar 34. A limit block 53 is rotatably connected to the inner wall of the housing 1. A slide groove 54 is slidably connected to the outside of the limit block 53. The other end of the slide groove 54 is fixedly connected to the outside of the feed tooth 55. The limit block 53 cooperates with the slide groove 54 to guide the sliding rail of the feed tooth 55. The tracking is restricted and guided to ensure that the feed tooth 55 can move smoothly along the predetermined path, ensuring the accuracy and stability of fabric feeding. The other end of the follower plate 44 is fixedly connected to the outside of the needle bar 34, and the outside of the adjustment plate 46 is slidably connected to the outside of the housing 1. This connection method allows the movement of the follower plate 44 to directly drive the needle bar 34 to move up and down, while the sliding of the adjustment plate 46 outside the housing 1 allows the user to easily fine-tune the position of the needle bar 34 from the outside, further improving the accuracy and convenience of sewing operations.

[0040] Specifically, the adjusting plate 46 is rotatably connected to the support column 43 via a bearing. The support column 43 is made of high-strength aluminum alloy, and its other end is fixed to the reinforcing rib of the inner wall of the housing 1 by bolts. This triangular support structure can withstand the alternating load when the needle bar 34 rises and falls. The cylindrical pin 31 of the limiting block 53 is interference-fitted with the bearing hole of the housing 1. Its external T-shaped guide rail and the groove of the slide 54 form a sliding pair. The slide 54 is fixed to the side plate of the feed tooth 55 by countersunk screws. When the feed tooth 55 makes compound movements, the limiting block 53 can limit its lateral offset. The follower plate 44 is made of elastic steel plate. One end of its L-shaped structure is hinged to the connecting seat of the needle bar 34 via a pin, and the slider at the other end is embedded in the dovetail groove of the adjusting plate 46. The user can drive the adjusting plate 46 to slide laterally through the adjusting knob on the outside of the housing 1, thereby precisely adjusting the upper and lower stop positions of the needle bar 34. The resolution of this fine-tuning mechanism can meet the sewing process requirements of different fabrics.

[0041] The implementation principle of this application embodiment is as follows: When the presser foot 28 is used on weather-resistant, high-toughness, and anti-aging leather fabric for a long time, it will be damaged. When the presser foot 28 is damaged, the sliding column 23 drives the connecting ring 22 to rotate, causing the limiting block 244 to rotate and release the fixing of the connecting rod 25, which facilitates the replacement of the presser foot 28. When the connecting ring 22 rotates, the connecting column 243 drives the spring 242 to stretch, and the fixing column 241 restricts the position, which facilitates the pull-back of the connecting column 243 and restricts the connecting rod 25. This ensures that the presser foot 28 can be re-securely fixed after replacement, ensuring the normal operation of sewing.

[0042] When motor 41 rotates, it drives semicircle 42 to rotate, causing follower plate 44 to move and needle bar 34 to move up and down. When needle bar 34 moves, it passes through oil reservoir 32, causing ball bearing 35 to rotate, causing lubricating oil on the inner wall of oil reservoir 32 to slide out, which facilitates better movement of needle bar 34 and does not affect use. This lubrication method can effectively reduce the frictional resistance of needle bar 34 during movement, reduce energy loss, reduce wear, extend the service life of needle bar 34, and ensure that a sewing machine with easy-to-maintain presser foot maintains stable working performance during long-term use.

[0043] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sewing machine with an easy-to-maintain presser foot, comprising a housing (1), characterized in that: The top of the housing (1) is fixedly connected to a quick-release mechanism (2), the inner wall of the housing (1) is slidably connected to a lubrication mechanism (3), the inner wall of the housing (1) is fixedly connected to a lifting mechanism (4), and the inner wall of the housing (1) is fixedly connected to a sliding mechanism (5). The quick-release mechanism (2) includes a support column (27), the support column (27) is fixedly connected to the inner wall of the housing (1), a fixing ring (21) is fixedly connected to the bottom of the support column (27), a connecting ring (22) is rotatably connected to the inner wall of the fixing ring (21), a sliding column (23) is fixedly connected to the outside of the connecting ring (22), a connecting rod (25) is slidably connected to the bottom of the connecting ring (22), a pressure foot (28) is fixedly connected to the other end of the connecting rod (25), a limit groove (26) is opened on the outside of the connecting rod (25), and a limit component (24) is fixedly connected to the outside of the fixing ring (21).

2. A sewing machine with an easy-to-maintain presser foot according to claim 1, characterized in that: The lubrication mechanism (3) includes a cylinder (31), the top of which is fixedly connected to the inner wall of the housing (1), and a needle rod (34) is slidably connected to the other end of the cylinder (31). An oil reservoir (32) is fixedly connected to the outside of the cylinder (31). Multiple oil outlets (33) are provided on the inner wall of the oil reservoir (32). A ball bearing (35) is slidably connected to the outside of the needle rod (34). An oil inlet (36) is fixedly connected to the outside of the oil reservoir (32). A cover (37) is movably connected to the outside of the oil inlet (36).

3. A sewing machine with an easy-to-maintain presser foot according to claim 2, characterized in that: The lifting mechanism (4) includes a motor (41), which is fixedly connected to the inner wall of the housing (1). A semicircle (42) is fixedly connected to the driving end of the motor (41). A follower plate (44) is rotatably connected to the outside of the semicircle (42). A connecting rod (45) is fixedly connected to the outside of the follower plate (44). An adjusting plate (46) is fixedly connected to the other end of the connecting rod (45).

4. A sewing machine with an easy-to-maintain presser foot according to claim 3, characterized in that: The adjustment plate (46) is rotatably connected to a support column (43), and the other end of the support column (43) is fixedly connected to the inner wall of the housing (1).

5. A sewing machine with an easy-to-maintain presser foot according to claim 1, characterized in that: The limiting component (24) includes a fixing post (241), both ends of which are fixedly connected to the inner wall of the fixing ring (21). A spring (242) is fixedly connected to the outside of the fixing post (241). A connecting post (243) is fixedly connected to the other end of the spring (242). The other end of the connecting post (243) is fixedly connected to the outer wall of the connecting ring (22). A limiting block (244) is rotatably connected to the outside of the connecting ring (22). A positioning post (245) is rotatably connected to the other end of the limiting block (244). The other end of the positioning post (245) is fixedly connected to the inner wall of the fixing ring (21).

6. A sewing machine with an easy-to-maintain presser foot according to claim 1, characterized in that: The inner wall of the sliding mechanism (5) is fixedly connected to a motor (51), the drive end of the motor (51) is fixedly connected to a driven plate (52), and the outside of the driven plate (52) is rotatably connected to a feeding tooth (55).

7. A sewing machine with an easy-to-maintain presser foot according to claim 6, characterized in that: The inner wall of the housing (1) is rotatably connected to a limiting block (53), and the outside of the limiting block (53) is slidably connected to a sliding groove (54). The other end of the sliding groove (54) is fixedly connected to the outside of the feeding tooth (55).

8. A sewing machine with an easy-to-maintain presser foot according to claim 3, characterized in that: The other end of the follower plate (44) is fixedly connected to the outside of the needle bar (34), and the outside of the adjusting plate (46) is slidably connected to the outside of the housing (1).

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