Improved domestic electric medium speed industrial overlock machine chassis

Abstract

The application discloses an improved household electric medium-speed industrial overlock machine chassis, which comprises a chassis, a bottom chassis pad with adhesive, a lower positioning pad with adhesive, a combined thread rack, an adjustable motor fixing plate and a scrap receiving box. The chassis cancels the traditional inner concave edge of the front side, and the extra space is provided with the scrap receiving box, which can effectively receive the material edge generated in the process of edge locking and prevent the problem of dirty and messy machine bottom. The combined thread rack is successfully connected with the overlock machine and becomes an integral whole, which solves the problem that the traditional thread rack needs to be fixed separately and is very inconvenient to use. The adjustable motor fixing plate solves the problems of incorrect angle adjustment and unstable fixation of the traditional clamping plate type motor. The long and wide strip-shaped bottom chassis pad with adhesive makes the machine more stable. The long and wide strip-shaped lower positioning pad with adhesive solves the problem that the traditional chassis needs to be placed with anti-skid material at the bottom during use, and the machine is often displaced due to motor vibration, so that the stability of the machine during high-speed operation is also excellent.

Description

Technical Field

[0001] This invention relates to the field of medium-speed industrial overlock sewing machine technology, and more specifically to a household electric chassis suitable for medium-speed industrial overlock sewing machines. Background Technology

[0002] The medium-speed industrial overlock sewing machine described in this invention refers to products classified as part of the GN1 series according to national sewing machine product model standards, as well as extended models derived from this series, commonly known as overlock machines or edge-sealing machines. It boasts numerous advantages, including small size, light weight, mature technology, and excellent cost-effectiveness. Due to its industrial-grade design with speeds reaching up to 3000 rpm and the ability to be manually lubricated from all angles, many of these products have been in use for decades. Therefore, it remains the preferred choice for many individual customers, with a market demand of hundreds of thousands of units annually. However, with the development of technology, some design shortcomings in its application to the home market have gradually been criticized by the public.

[0003] Because manual lubrication is required, a tray, also known as an oil pan, is located at the bottom to collect any dripping oil. Since it is much larger than the overlock machine housing, a significant amount of fabric scraps cut during the overlocking process fall into the tray. Over time, this accumulation, combined with the dripping oil, causes further buildup. The mixing of machine oil and other contaminants in the tray leads to a persistent problem of dirt and grime on the bottom. Traditional chassis connect to the overlock machine using four conical chassis pads, fixed to the inner sides of the chassis with screws. This results in a small contact area, poor stability, and easy damage. Traditional chassis only have four feet cast at the four corners, lacking anti-slip and suction positioning designs. Thick anti-slip material must be placed on the bottom during use, which is inconvenient, and the machine frequently moves due to motor vibration. Furthermore, the traditional thread frame and overlock machine are separate units, limiting the machine's use to the vicinity of the thread frame's fixed position, which takes up considerable space. It is also very inconvenient to use; there is a design on the market with a wire frame fixing seat cast on the rear side of the chassis. Since it can only be obtained using cast iron technology and is simply cast into one piece, the cost is very high. Moreover, the added wire frame fixing seat is too large, so the flatness is poor and it is very easy to break. The surface is also rougher. It has no value for large-scale promotion and application, and there are very few users. There are currently two main types of motors for household medium-speed industrial overlock sewing machines: one type directly fixes the motor to the overlock sewing machine housing. Since it is necessary to pre-machine the screw holes on the housing and the installation is also relatively troublesome, the proportion of use is not high. The most common type is the clamp-type motor fixing. The main fixing plate with the motor is inserted into the inner side of the rear side of the chassis, and there is a separate motor clamp plate on the outer side of the rear side. By tightening two screws, the main fixing plate with the motor and the motor clamp plate are clamped to the inner and outer sides of the rear side of the chassis. This method is simple to operate, but due to the unreasonable design of the motor clamping plate and the large deformation of the traditional cast iron chassis, as well as the slope of the side designed to be thinner at the top and thicker at the bottom for casting and mold release, it is difficult to make the belt angle between the motor pulley groove and the handwheel groove of the overlock machine perfectly consistent. In addition, the motor is not very securely fixed, and most motors wobble significantly during use. Therefore, it is very easy to damage the belt and motor rotor.

[0004] There is also a type of low-speed, purely household-use overlock sewing machine on the market, operating at 1200 rpm. Previously, the national standard model was FN. Currently, most household overlock sewing machines, except for the GN1 series medium-speed industrial overlock sewing machines, can be categorized into this product series. Its main characteristic is a fully enclosed design, preventing internal lubrication. Some products have an oil line design, but this only provides micro-lubrication to a few parts. Therefore, its components can only be made of low-speed, low-load materials such as plastic, nylon, aluminum alloy, powder metallurgy, and stamped parts. This results in a limited lifespan, even for imported brands costing several thousand yuan. However, due to the fully enclosed design, there is sufficient space on the outside to directly fix the thread holder to the housing; the motor is also designed inside the overlock sewing machine housing; because of the oil-free design, its chassis is almost the same size as the overlock sewing machine housing and has no sides, so the fabric scraps cut by the overlock sewing machine fall directly onto the operating platform, making cleaning very convenient; the bottom of its chassis also has four rubber pads, fixed to the four feet of the chassis with screws. Because of the low rotation speed, the stability is relatively good. The two types of products differ significantly in structure and performance, and their chassis and related components are also different. However, since both are intended for household use, how to leverage the strengths and compensate for the weaknesses of medium-speed industrial overlock sewing machines in the new environment and maintain their competitive edge has become an urgent problem for product developers. Summary of the Invention

[0005] Due to the aforementioned shortcomings of existing products, this invention proposes an improved chassis for a household electric medium-speed industrial overlock sewing machine. It specifically addresses the problems of inconvenience in use, poor stability, unstable motor mounting, incorrect angle adjustment, and a dirty / unpleasant bottom in existing products.

[0006] The present invention adopts the following technical solution:

[0007] An improved chassis for a household electric medium-speed industrial overlock sewing machine is mainly obtained through stamping, cutting, bending, drilling, and tapping. It includes: a chassis, an adhesive-backed chassis pad, an adhesive-backed lower positioning pad, a combined thread frame, an adjustable motor mounting plate, and a chip collection box. The chassis, adhesive-backed chassis pad, adhesive-backed lower positioning pad, combined thread frame, adjustable motor mounting plate, and chip collection box are separate structures. The adhesive-backed chassis pad and adhesive-backed lower positioning pad are both bonded to the chassis with their own adhesive surfaces. The combined thread frame and adjustable motor mounting plate are both fixed to the side of the chassis with screws. The chip collection box is placed in the middle of the front side of the chassis. The chassis is a single, integrally molded part.

[0008] The chassis includes: a motor mounting part, a chassis pad part, a wire frame mounting part, a chip collection box part, a lower positioning pad part, a rear side, a right side, a front side, an inner protruding positioning point, a left side, a front part of the bottom plane, a back part of the bottom plane, and chassis locking screw holes; the motor mounting part is located on the right side of the rear side of the chassis; the wire frame mounting part is located on the rear side of the right side of the chassis; the chip collection box part is located on the front part of the bottom plane in the middle of the front side of the chassis; the chassis pad part is located on the front part of the bottom plane, with one on each side; the inner protruding positioning point is located at the upper end of the chassis pad part, and there are two inner protruding positioning points at the upper end of the left and right chassis pad parts; the lower positioning pad part is located on the back part of the bottom plane, with one on each side; the chassis locking screw holes are located at the center of the front part and the back part of the bottom plane; the chassis is a parallel rectangular structure with four sides and a bottom plane, and the four sides are connected by R-angles, and the four sides are of the same height, and are seamlessly connected to the front part and the back part of the bottom plane.

[0009] The improved chassis described in this invention is formed in one step through stamping, punching, and tapping. Compared to chassis made of traditional cast iron, it has many advantages such as uniform dimensions, high flatness, and low cost. While stamping is a mature technology, it has not been used in the manufacture of chassis for traditional medium-speed industrial overlock sewing machines. The main reason is that traditional chassis have a concave edge on the front side, resulting in a large inward shrinkage depth, limited stamping space, and two near-90° bends. This side is also relatively high and uneven in height, making the stamping process ineffective, or even completely impractical. Even if the concave edge problem is solved through special processes, the cost would be far higher than that obtained using cast iron, thus rendering it meaningless. The improved chassis eliminates the concave edge, making the chassis with the technical features described in this invention extremely simple to obtain through stamping, reducing costs by up to 150%. Furthermore, the added concave edge of the original traditional chassis is transformed into a chip collection box, ensuring both the feasibility and low cost of obtaining the chassis through stamping, while also solving the problem of fabric chip recycling in medium-speed industrial overlock sewing machines. The chassis pad, convex positioning point, and lower positioning pad obtained through one-piece molding are innovative features. The motor fixing part designed on the side solves the drawback of the traditional clamp-type motor's unstable fixing. The thread frame fixing part cleverly connects the thread frame and the overlock sewing machine into one unit, fundamentally improving the ease of use of medium-speed industrial overlock sewing machines.

[0010] The motor fixing part is located on the right side of the rear side of the chassis, and this part is provided with two threaded holes, which are obtained by punching and tapping.

[0011] The wire frame fixing part is located on the rear side of the right side of the chassis, and this part is provided with a threaded hole, which is obtained by punching and tapping.

[0012] The chip collection box is located in the front part of the bottom plane at the middle position of the front side of the chassis. This part does not have the concave edge structure of the traditional chassis. Its outer side is consistent with the front side of the chassis and parallel to the rear side. The extra space compared to the traditional chassis is the chip collection box. This part and the chassis are formed in one piece.

[0013] The chassis pad is located on the front of the bottom plane and is a raised rectangular strip-shaped design with one pad on each side, and the pads are the same size, in the same position and parallel to each other.

[0014] The chassis pad of this invention changes the traditional chassis design which only has four small chassis pad fixing surfaces, greatly increasing the installation area of ​​the chassis pad.

[0015] The inner convex positioning points are located at the front and rear ends of the upper plane of the chassis pad, and are designed as convex points with a diameter of 0.3 cm and a height of 0.3 cm. There are two of them on the upper plane of the left and right chassis pads, and they are in the same position and have the same size. This part is formed in one piece with the chassis.

[0016] The inner convex positioning point of this invention is designed with four convex points formed in one step, which solves the problem of traditional chassis pads requiring screw fixation, saves labor costs, and prevents the possibility of generating defective or broken parts during drilling and tapping.

[0017] The lower positioning pad is located on the back side of the bottom plane and has a rectangular strip-shaped groove structure. It is in the same position and has the same size as the chassis pad on the front side of the bottom plane, except that it is a convex and a concave surface after stamping. There is one on the left and one on the right, and the left and right lower positioning pads are parallel and have the same size. The lower positioning pad is the concave structure side. This part and the chassis are formed in one piece.

[0018] The lower positioning pad described in this invention is a chassis pad mounting part, which solves the drawback of traditional chassis back parts having only four integrated small feet without anti-slip and adsorption positioning functions, and greatly increases the installation area of ​​the lower positioning pad. The recessed groove design eliminates the need for screw fixing of the lower positioning pad, which saves labor costs and prevents the possibility of waste and defective parts generated during drilling and tapping.

[0019] The adhesive-backed chassis pad is a rectangular strip with the same dimensions as the upper surface of the chassis pad. The adhesive-backed chassis pad has a 0.4 cm diameter hole at the same position as the inner convex positioning point, and this hole fits perfectly onto the inner convex positioning point. The adhesive-backed chassis pad is designed with its own adhesive surface and adheres to the chassis pad, with one pad on each side.

[0020] Compared to the traditional small conical base pad, the rectangular strip-shaped adhesive base pad described in this invention greatly increases the contact area with the overlock sewing machine housing, thus improving the machine's stability. Furthermore, the elimination of screws for fixing further saves labor costs.

[0021] The adhesive-backed lower positioning pad is a rectangular strip with a length and width that are 0.2 cm narrower than the lower positioning pad. The adhesive-backed base pad is designed with its own adhesive surface and adheres to the groove of the lower positioning pad, extending above the outer plane of the groove. There is one pad on each side.

[0022] The adhesive-backed positioning pad described in this invention solves the problem of traditional chassis lacking adsorption and anti-slip functions at the bottom. Compared to the positioning pad design under the four small bottom feet of low-speed, fully enclosed household overlock sewing machine series, the rectangular strip-shaped positioning pad greatly increases the contact and adsorption area with the platform, allowing the overlock sewing machine to maintain excellent stability even at high speeds. This invention not only solves the problem of traditional chassis having no positioning pad, but also provides better stability compared to other types of household overlock sewing machine products, thus enhancing the quality advantages of medium-speed industrial overlock sewing machine series products.

[0023] The combined wire frame includes: a wire frame fixing plate, a wire hook fixing rod, a wire hook, a wire reel frame, a wire reel nail, and a wire support. The wire hook is located at the top of the wire hook fixing rod and is connected to it. The wire support is installed on the wire reel nail. The wire reel nail and the wire hook fixing rod are both installed on the wire reel frame. The wire reel frame is fixed to the wire frame fixing plate by screws.

[0024] The combined thread frame described in this invention abandons the fixed base at the bottom of the traditional thread frame assembly, and achieves integrated connection with the overlock sewing machine by fixing it to the chassis. It is very convenient to install and disassemble, and the overall cost is reduced by more than 30%.

[0025] The wire frame fixing plate includes a wire frame fixing plate, a wire frame fixing groove, and wire reel fixing screw holes. The wire frame fixing plate is a rectangular strip with a 90° upward bend at its left end, the height of which is the same as the height of the right side of the chassis. The upper middle part of the left bend also has an open slot—the wire frame fixing groove—directly facing upwards and downwards. A wire reel fixing screw hole is also provided on the right side of the wire frame fixing plate. The wire reel is fixed to the wire reel fixing screw hole by screws, and the combined wire frame is fixed to the wire frame fixing part on the chassis by screws passing through the wire frame fixing groove. The wire frame fixing plate is formed by stamping in one piece, while the wire reel fixing screw holes are obtained by punching and tapping.

[0026] The adjustable motor fixing plate is a flat, one-piece component, including an adjustable motor fixing plate, motor fixing holes, and a chassis fixing groove. The two motor fixing holes on the upper side of the adjustable motor fixing plate have the same hole spacing as the two motor fixing screw holes on the motor end of the overlock sewing machine, and are designed as "I"-shaped long grooves, with a certain adjustment distance on both the left and right sides. The two vertically opening long grooves at the lower end of the adjustable motor fixing plate are chassis fixing grooves, and have the same hole spacing as the two screw holes on the chassis motor fixing part. The two chassis fixing grooves are designed in parallel, and the adjustable motor fixing plate is formed by stamping in one piece.

[0027] The adjustable motor mounting plate of this invention ensures the parallelism between the motor pulley groove and the overlock machine handwheel groove by moving the motor mounting holes left and right. Furthermore, by raising one side of the left or right chassis mounting groove, the vertical angle between the motor pulley groove and the overlock machine handwheel groove can be easily adjusted, thus ensuring angular consistency. This reduces wear on the belt and motor rotor. Two screws pass through the two motor mounting holes of the adjustable motor mounting plate and are fixed to the motor mounting threaded holes at the motor end of the overlock machine, locking them together to the motor mounting part on the rear side of the chassis. The thickness of the three parts overlaps and they fit tightly together, thus significantly increasing the motor's stability. In contrast, traditional clamp-type motors are attached to the inner and outer sides of the chassis with two screws. The small contact area and the slope of the rear side of the cast iron chassis make it difficult to securely fix the motor, resulting in poor angular consistency. The open design of the chassis mounting groove makes motor disassembly extremely easy. This invention does not make any changes to the main body of the motor; it only requires replacing the motor clamp with an adjustable motor fixing plate. The cost is not increased, but all the defects of the clamp-type motor are completely solved. It has extremely high value for promotion and application. Since there is a demand of millions of household overlock machine motors every year, it is extremely practical.

[0028] The chip collection box is a rectangular, open box with a long, outward-facing, 90° right-angled bend at the top of its outer side and a small, inward-facing, upward-facing, 45° bend at the top of its inner side. The bottom left side of the chip collection box has a magnetic sticker.

[0029] The lint collector described in this invention is placed in the lint collection section of the chassis. Fabric lint cut during the overlocking process falls directly into the lint collector. The separate design of the lint collector makes emptying the lint extremely convenient, while the magnetic attachment at the bottom ensures a perfect fit between the lint collector and the chassis, facilitating easy placement and removal. Traditionally, fabric lint scattered inside the chassis accumulates and mixes with machine oil, causing a persistent problem of dirt and grime on the bottom, a complaint from many customers. This innovative design solves this problem, elevating the user experience to a new level.

[0030] The chassis is connected to the bottom of the overlock sewing machine by screws passing through the chassis locking screw holes.

[0031] The present invention has the following advantages: since the chassis is obtained by one-time molding, there is no deformation, uniform size, and high flatness, and the overall cost of related components is reduced by more than 180%. Furthermore, the long and wide strip design of the left and right chassis pads increases the fit between the machine and the chassis, improving machine stability. The design of the left and right lower positioning pads not only solves the problem of having none at all, but the long and wide strip design of the lower positioning pads also increases the contact area between the overlock sewing machine and the work platform, resulting in better adhesion and preventing machine shaking even at high speeds. The absence of positioning screws eliminates the need for drilling and tapping, effectively improving production efficiency and preventing the generation of defective or scrap parts. The effective connection and easy disassembly of the thread frame assembly to the chassis truly enhances product usability and improves the customer experience. The adjustable motor mounting plate completely solves the problems of unstable motor mounting and difficulty in adjusting the parallelism and perpendicularity between the motor pulley groove and the overlock sewing machine handwheel groove, or even complete misalignment. Motor installation and disassembly become extremely convenient. The design of the lint collection box effectively solves the problem of fabric lint falling into the inner side of the chassis. This invention is technologically mature, low-cost, highly operable, and effectively addresses the main design shortcomings of medium-speed industrial overlock sewing machines used in the home market. Due to their industrial design, medium-speed industrial overlock sewing machines offer unparalleled advantages in terms of extended service life and low price compared to other types of household overlock sewing machines. The application of the aforementioned technologies will undoubtedly bring about a revolutionary quality improvement to medium-speed industrial overlock sewing machines, enabling them to demonstrate a stronger competitive edge in the new era. Attached Figure Description

[0032] Figure 1 This is an exploded view of the front structure of the relevant components of the household electric chassis of the present invention;

[0033] Figure 2 This is an exploded view of the rear structure of the relevant components of the household electric chassis of the present invention;

[0034] Figure 3 This is a schematic diagram of the adjustable motor mounting plate of the present invention;

[0035] Figure 4 This is a schematic diagram of the combined wire frame structure of the present invention.

[0036] Figure 5 This is a schematic diagram of the wire frame fixing plate of the present invention;

[0037] Figure 6 This is a schematic diagram of the chip collection box of the present invention;

[0038] Figure 7 A schematic diagram of the front of a traditional medium-speed industrial overlock sewing machine chassis;

[0039] Figure 8 This is a schematic diagram of the back of the chassis of a traditional medium-speed industrial overlock sewing machine.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Chassis; 2. Motor mounting part; 3. Adjustable motor mounting plate; 4. Chassis pad; 5. Wire frame mounting part; 6. Wire frame mounting plate; 7. Chip collection box; 8. Chip collection box; 9. Lower positioning pad; 10. Rear side; 11. Right side; 12. Front side; 13. Inner protruding positioning point; 14. Wire spool mounting screw hole; 15. Adhesive-coated chassis pad; 16. Adhesive-coated lower positioning pad; 17. Left side; 18. Bottom plane. 19. Face; 20. Back of bottom plane; 21. Magnetic adhesive; 22. Chassis locking screw hole; 23. Motor mounting hole; 24. Chassis mounting groove; 25. Motor mounting thread hole; 26. Chassis pad; 27. Chassis pad mounting surface; 28. Concave edge; 601. Thread hook fixing rod; 602. Thread hook; 603. Thread spool frame; 604. Thread spool nail; 605. Thread support; 606. Thread spool fixing groove. Detailed Implementation

[0042] The present invention will now be described in detail with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and not for limiting the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0043] like Figure 1 As shown, this invention discloses an improved chassis for a household electric medium-sized industrial overlock sewing machine, comprising a chassis 1, an adhesive chassis pad 15, an adhesive lower positioning pad 16, a combined thread frame, an adjustable motor mounting plate 6, and a chip collection box 8; the adhesive chassis pad 15 and the adhesive lower positioning pad 16 are both bonded to the chassis 1 with their own adhesive surfaces; the combined thread frame and the adjustable motor mounting plate 6 are both fixed to the side of the chassis 1 with screws; the chip collection box 8 is placed in the middle of the front side of the chassis 1.

[0044] like Figure 1 and Figure 2The chassis 1 of the present invention includes a motor fixing part 2, a chassis pad part 4, a wire frame fixing part 5, a chip collection box part 7, a lower positioning pad part 9, a rear side 10, a right side 11, a front side 12, an inner protruding positioning point 13, a left side 17, a bottom plane front part 18, a bottom plane back part 19, and a chassis locking screw hole 21. The motor fixing part 2 is located on the right side of the rear side 10 of the chassis 1; the wire frame fixing part 5 is located on the rear side of the right side 11 of the chassis 1; the chip collection box part 7 is located on the bottom plane front part 18 in the middle of the front side 12 of the chassis 1; the chassis pad part 4 is located on the bottom plane front part. The chassis 1 has two inner convex positioning points 13 on each side of the upper plane of the chassis pad 4; the lower positioning pad 9 is located on the back side of the bottom plane 19, with one on each side; the chassis locking screw hole 21 is located at the center of the front side of the bottom plane 18 and the back side of the bottom plane 19; the chassis 1 is a parallel rectangular structure with four sides and a bottom plane, and the four sides are connected by R-angles, and the four sides are of the same height, and are seamlessly connected to the front side of the bottom plane 18 and the back side of the bottom plane 19.

[0045] In practice, except for the motor fixing part 2 and the wire frame fixing part 5 which are obtained by punching and tapping, the rest of the chassis 1 is formed by stamping in one piece, which has obvious advantages in cost and quality compared with traditional cast iron chassis.

[0046] like Figure 1 and Figure 2 As shown, the motor fixing part 2 of the present invention is located on the right side of the rear side 10 of the chassis 1, and this part is provided with two threaded holes.

[0047] In the specific implementation, the threaded holes are obtained by punching and tapping.

[0048] like Figure 1 and Figure 2 As shown, the wire frame fixing part 5 of the present invention is located on the rear side of the right side 11 of the chassis 1, and this part is provided with a threaded hole.

[0049] In the specific implementation, the threaded holes are obtained by punching and tapping.

[0050] like Figure 1 and Figure 2 As shown, the chip collection box 7 of the present invention is located in the front part 18 of the bottom plane at the middle position of the front side 12 of the chassis 1. This part does not have the concave edge 27 of the conventional chassis, and its outer side is consistent with the front side 12 of the chassis 1 and parallel to the rear side 10. The extra space compared to the conventional chassis is the chip collection box 7.

[0051] In specific implementation, the chip receiving box 7 is integrally formed with the chassis 1 through a stamping process.

[0052] like Figure 1 and Figure 2 As shown, the chassis pad 4 of the present invention is located on the front part 18 of the bottom plane, and is a raised rectangular strip-shaped planar design, with one on the left and one on the right, and the same size, the same position and parallel shape.

[0053] In practice, the chassis pad 4 is integrally formed with the chassis 1 by a stamping process.

[0054] like Figure 1 and Figure 2 As shown, the inner convex positioning points 13 of the present invention are located at the front and rear ends of the upper plane of the chassis pad 4, and are designed as convex points with a diameter of 0.3 cm and a height of 0.3 cm. There are two of them on the upper plane ends of the left and right chassis pads 4, and they are in the same position and have the same size.

[0055] In practice, the inner convex positioning point 13 is obtained by stamping and integrally forming with the chassis 1.

[0056] like Figure 1 and Figure 2 As shown, the lower positioning pad 9 of the present invention is located on the back side of the bottom plane 19 and has a rectangular long and wide strip-shaped groove planar structure. It is in the same position and has the same size as the chassis pad 4 on the front side of the bottom plane 18. It is just a convex and a concave surface after stamping. There is one on the left and one on the right. The left and right lower positioning pads 9 are parallel and have the same size. The lower positioning pad 9 is the concave structure side.

[0057] In practice, the lower positioning pad 9 is integrally formed with the chassis 1 through a stamping process.

[0058] like Figure 1 As shown, the adhesive-coated chassis pad 15 of the present invention is a rectangular strip with the same dimensions as the upper plane of the chassis pad portion 4. The adhesive-coated chassis pad 15 has a circular hole with a diameter of 0.4 cm at the same position as the inner convex positioning point 13, and this hole fits perfectly on the inner convex positioning point 13. The adhesive-coated chassis pad 15 is designed with its own adhesive surface and is adhered to the chassis pad portion 4, with one pad on each side.

[0059] In specific implementations, the adhesive-backed base pad 15 can be made of various materials such as rubber strips, felt strips, and silicone strips, depending on the usage environment and cost requirements. The adhesive-backed base pad 15 serves as a buffer between the base 1 and the overlock sewing machine. After the base 1 is locked onto the main body of the overlock sewing machine, the adhesive-backed base pad 15 adheres tightly to the bottom of the overlock sewing machine. Its own elasticity can absorb the vibrations generated during the operation of the overlock sewing machine, while the long and wide strip-shaped adhesive-backed base pad 15 can improve the stability of the overlock sewing machine's operation.

[0060] like Figure 2As shown, the adhesive-coated lower positioning pad 16 of the present invention is a rectangular strip with a length and width of 0.2 cm narrower than the lower positioning pad portion. The adhesive-coated base pad 16 is designed with its own adhesive surface and is adhered to the groove of the lower positioning pad portion 9, and is higher than the outer plane of the groove, with one strip on each of the left and right sides.

[0061] In practice, the adhesive-coated lower positioning pad 9 is located at the bottom of the chassis 1. Its full fit with the platform can effectively prevent the machine from shaking and shifting, while the long and wide strip design further ensures the stability of the machine.

[0062] like Figure 1 and Figure 4 As shown, the combined wire frame of the present invention includes: a wire frame fixing plate 6, a wire hook fixing rod 601, a wire hook 602, a wire reel frame 603, a wire reel nail 604, and a wire support 605. The wire hook 602 is located at the top of the wire hook fixing rod 601 and is connected to it. The wire support 605 is mounted on the wire reel nail 604. The wire reel nail 604 and the wire hook fixing rod 601 are both mounted on the wire reel frame 603. The wire reel frame 603 is fixed to the wire frame fixing plate 6 by screws.

[0063] like Figure 5 As shown, the wire frame fixing plate of the present invention includes a wire frame fixing plate 6, a wire frame fixing groove 606, and a wire reel fixing screw hole 14. The wire frame fixing plate 6 is a rectangular strip with a 90° right angle bend at the left end, and the height of this edge is the same as the height of the right side 11 of the chassis 1. The upper middle part of the left bend edge also has an open groove in the upper and lower directions, which is the wire frame fixing groove 606. The wire reel fixing screw hole 14 is also provided on the right side of the wire frame fixing plate 6. The wire reel 603 is fixed to the wire reel fixing screw hole 14 by screws, and the combined wire frame is fixed to the wire frame fixing part 5 of the chassis 1 by screws passing through the wire frame fixing groove 606.

[0064] In practice, the thread spool fixing screw hole 14 is obtained by punching and tapping, while the rest of the thread spool fixing plate 6 is formed by stamping. The thread spool fixing plate 6 can be easily disassembled or installed without removing the thread spool fixing screws 606, and the thread spool fixing plate 6 successfully integrates the thread spool assembly with the overlock sewing machine into a single structure.

[0065] like Figure 1 and Figure 3As shown, the adjustable motor fixing plate 3 of the present invention is a flat integral piece, including an adjustable motor fixing plate 3, motor fixing holes 22 and chassis fixing grooves 23. The two motor fixing holes 22 on the upper side of the adjustable motor fixing plate 3 have the same hole spacing as the two motor fixing screw holes 24 on the motor end of the overlock sewing machine, and are designed as "I"-shaped long grooves, with a certain adjustment distance on both the left and right sides. The two "vertical" open long grooves at the lower end of the adjustable motor fixing plate 3 are chassis fixing grooves 23, and have the same hole spacing as the two screw holes of the motor fixing part 2 of the chassis 1, and the two chassis fixing grooves 23 are designed in parallel.

[0066] In specific implementation, the adjustable motor mounting plate 3 is integrally formed by stamping. Two screws are passed through the two motor mounting holes 22 on the upper side of the adjustable motor mounting plate 3 to lock it to the two motor mounting threaded holes 24 at the motor end of the overlock machine. By loosening these two screws and moving the motor to the left or right, the parallel angle between the motor pulley groove and the overlock machine handwheel groove can be adjusted to be consistent. Furthermore, by passing two screws through the two chassis mounting slots 23 at the lower end of the adjustable motor mounting plate 3, the motor body and the adjustable motor mounting plate 3 are locked together to the two threaded holes of the motor mounting part 2 of the chassis 1. By raising the height of the left or right side of the chassis mounting slot 23 individually, the vertical angle between the motor pulley groove and the overlock machine handwheel groove can be adjusted to be consistent. Through these operations, the overlock machine motor can be firmly fixed to the rear side 10 of the chassis 1, and the parallel and vertical directions of the overlock machine handwheel groove and the motor pulley groove can be consistent.

[0067] like Figure 6 As shown, the chip collection box 8 of the present invention is a rectangular open box, with a long bent edge at a 90° right angle on the top of its outer side, and a small bent edge at a 45° angle on the top of its inner side, and a magnetic sticker 20 on the bottom left side of the chip collection box 8.

[0068] In practice, the fabric scrap collection box 8 is formed by stamping or cutting and bending in one step. The long bent edge at the top of the outer side of the collection box 8 serves as a gripper when picking up and putting down the collection box 8. The lower side of the small 45° bend at the upper end of the inner side contacts the door panel screw on the overlock sewing machine. Due to the thickness of the door panel screw head, the inner side of the collection box 8 cannot be completely fitted with the overlock sewing machine. The small bend solves this problem. The 45° upward angle allows fabric scraps to quickly slide into the collection box 8 when they fall to this bend. The collection box 8 is placed on the collection box part 7 of the base 1. Fabric scraps cut during the overlock process fall into the collection box 8. The collection box 8 is designed separately, so it is very convenient to empty the fabric scraps. The magnetic adhesive 20 on the bottom left side of the collection box 8 can effectively attach the collection box 8 to the collection box part 7 of the base 1, thus ensuring the stability of the collection box 8.

[0069] like Figure 7 As shown, this figure is a schematic diagram of the front structure of a traditional medium-speed industrial overlock sewing machine chassis, used to illustrate the relevant structures and symbols on the front of the traditional chassis.

[0070] like Figure 8 As shown, this figure is a schematic diagram of the rear structure of a traditional medium-speed industrial overlock sewing machine chassis, used to illustrate the relevant structures and symbols on the rear of the traditional chassis.

[0071] The chassis 1 is connected to the bottom of the overlock sewing machine by screws passing through the chassis locking screw hole 21.

[0072] It should be understood that these embodiments are for illustrative purposes only and not for limiting the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. An improved chassis for a household electric medium-speed industrial overlock sewing machine, characterized in that, Formed by stamping, cutting, bending, drilling, and tapping, the chassis includes an adhesive-coated chassis pad, an adhesive-coated lower positioning pad, a combined wire frame, an adjustable motor mounting plate, and a chip collection box. The chassis, adhesive-coated chassis pad, adhesive-coated lower positioning pad, combined wire frame, adjustable motor mounting plate, and chip collection box are separate structures. The adhesive-coated chassis pad and adhesive-coated lower positioning pad are bonded to the chassis with their own adhesive surfaces. The combined wire frame and adjustable motor mounting plate are fixed to the side of the chassis with screws. The chip collection box is placed in the middle of the front side of the chassis. The chassis is a one-piece molded component, integrally formed with a motor mounting part, chassis pad part, wire frame mounting part, chip collection box part, lower positioning pad part, rear side, right side, front side, inner protruding positioning point, left side, bottom plane front part, and bottom. The chassis has a flat back surface and a chassis locking screw hole; the motor fixing part is located on the right side of the rear side of the chassis, the wire frame fixing part is located on the rear side of the right side of the chassis, the chip collection box part is located on the front surface of the bottom plane in the middle of the front side of the chassis, the chassis pad part is located on the front surface of the bottom plane with one on each side, the inner convex positioning point is located at the upper plane end of the chassis pad part, and the upper plane end of the left and right chassis pad parts each has two inner convex positioning points, the lower positioning pad part is located on the back surface of the bottom plane with one on each side, and the chassis locking screw hole is located at the center of the front surface of the bottom plane and the back surface of the bottom plane; the chassis is a parallel rectangular structure with four sides and a bottom plane, the four sides are connected by R-angles, the four sides are of the same height, and are seamlessly connected to the front surface of the bottom plane and the back surface of the bottom plane.

2. The improved chassis of the household electric medium-speed industrial overlock sewing machine according to claim 1, characterized in that, The motor mounting part is located on the right side of the rear side of the chassis, and this part is provided with two threaded holes.

3. The improved chassis of the household electric medium-speed industrial overlock sewing machine according to claim 1, characterized in that, The wire frame fixing part is located on the rear side of the right side of the chassis, and this part is provided with a threaded hole.

4. The improved chassis of the household electric medium-speed industrial overlock sewing machine according to claim 1, characterized in that, The chip collection box is located in the front part of the bottom plane at the middle position of the front side of the chassis, and its outer side is consistent with the front side of the chassis and parallel to the rear side.

5. The improved chassis of the household electric medium-speed industrial overlock sewing machine according to claim 1, characterized in that, The chassis pad is located on the front of the bottom plane and is a raised rectangular strip-shaped design with one pad on each side, and the pads are the same size, in the same position and parallel to each other.

6. The improved chassis of the household electric medium-speed industrial overlock sewing machine according to claim 1, characterized in that, The inner convex positioning points are located at the front and rear ends of the upper plane of the chassis pad, and are designed as convex points with a diameter of 0.3 cm and a height of 0.3 cm. There are two of them on the upper plane of the left and right chassis pads, and they are in the same position and have the same size.

7. The improved chassis of the household electric medium-speed industrial overlock sewing machine according to claim 1, characterized in that, The lower positioning pad is located on the back side of the bottom plane and has a rectangular strip-shaped groove structure. It is in the same position and has the same size as the chassis pad on the front side of the bottom plane. It is just that it is a convex and a concave surface after stamping, and there is one on the left and one on the right. The left and right lower positioning pads are parallel and have the same size, and the lower positioning pad is the concave structure side.

8. The improved chassis of the household electric medium-speed industrial overlock sewing machine according to claim 1, characterized in that, The adhesive-backed chassis pad is a rectangular strip with the same dimensions as the upper surface of the chassis pad. The adhesive-backed chassis pad has a 0.4 cm diameter hole at the same position as the inner convex positioning point, and this hole fits perfectly onto the inner convex positioning point. The adhesive-backed chassis pad is designed with its own adhesive surface and adheres to the chassis pad, with one pad on each side.

9. The improved chassis of the household electric medium-speed industrial overlock sewing machine according to claim 1, characterized in that, The adhesive-backed lower positioning pad is a rectangular strip with a length and width that are 0.2 cm narrower than the lower positioning pad portion. The adhesive-backed lower positioning pad is designed with its own adhesive surface and adheres to the groove of the lower positioning pad portion, extending above the outer plane of the groove. There is one pad on each side.

10. The improved chassis of the household electric medium-speed industrial overlock sewing machine according to claim 1, characterized in that, The combined wire frame includes a wire frame fixing plate, a wire hook fixing rod, a wire hook, a wire reel frame, a wire reel nail, and a wire support; the wire hook is located at the top of the wire hook fixing rod and is connected to it; the wire support is installed on the wire reel nail; both the wire reel nail and the wire hook fixing rod are installed on the wire reel frame; the wire reel frame is fixed to the wire frame fixing plate by screws.

11. The improved chassis of the household electric medium-speed industrial overlock sewing machine according to claim 10, characterized in that, The wire frame fixing plate includes a wire frame fixing groove and a wire reel fixing screw hole. The wire frame fixing plate is a rectangular strip with a 90° right angle bend at the left end, and the height of this bend is the same as the height of the right side of the chassis. The upper middle part of the left bend is also provided with a vertically open groove, i.e., the wire frame fixing groove. The right side of the wire frame fixing plate is also provided with a wire reel fixing screw hole. The wire reel is fixed to the wire reel fixing screw hole by screws, and the combined wire frame is fixed to the wire frame fixing part on the chassis by screws passing through the wire frame fixing groove.

12. The improved chassis of the household electric medium-speed industrial overlock sewing machine according to claim 1, characterized in that, The adjustable motor mounting plate is a flat, integrated piece, including motor mounting holes and chassis mounting slots. The two motor mounting holes on the upper side of the adjustable motor mounting plate have the same hole spacing as the two motor mounting thread holes on the motor end of the overlock sewing machine, and are designed as "I"-shaped long slots, with a certain adjustment distance on both the left and right sides. The two vertically open long slots at the lower end of the adjustable motor mounting plate are chassis mounting slots, and have the same hole spacing as the two thread holes on the chassis motor mounting part, and the two chassis mounting slots are designed in parallel.

13. The improved chassis of the household electric medium-speed industrial overlock sewing machine according to claim 1, characterized in that, The chip collection box is a rectangular, open-top box with a long, outward-facing, 90° right-angled bend at the top of its outer side, a small, inward-facing, upward-facing, 45° bend at the top of its inner side, and a magnetic sticker on the bottom left side of the chip collection box.

Images