Sealing structure of sewing machine

Abstract

The utility model relates to the technical field of sewing machines, and provides a sealing structure of a sewing machine, which comprises a sealing main body, a sewing machine chassis and a storage cavity, the storage cavity is arranged in the center of the sealing main body, an electric cylinder is arranged at the bottom end of the storage cavity, and a bottom table is arranged at the top end of the electric cylinder. A sewing machine body is movably installed on the electric air cylinder through a bottom table, a sewing machine chassis is arranged at the bottom end of the sewing machine body, a movable cavity and a limiting groove are symmetrically formed in the side wall of the storage cavity, and a servo motor is installed on the side wall of the sealing body; a driving shaft of the servo motor penetrates through the outer wall of the sealing main body, extends to the inner wall of the movable cavity and is connected with a lead screw, and a first sealing plate and a second sealing plate are symmetrically and movably mounted on the outer wall of the lead screw through threaded sleeves. And the dustproof and dustproof effects are limited.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, specifically to a sealing structure for a sewing machine. Background Technology

[0002] The sealing structure of a sewing machine is primarily used to prevent dust, fibers, and other debris from entering the machine, thus protecting the normal operation of its internal mechanical components. The effectiveness of the sealing structure directly affects the sewing machine's lifespan and performance; it is a crucial component ensuring normal operation and extending its service life. Through proper design, suitable material selection, and advanced manufacturing processes, the sealing structure can effectively protect the internal components of the sewing machine and improve overall performance. With technological advancements, the design and materials of sealing structures will continue to innovate to meet ever-changing market demands.

[0003] Patent specification CN 212714050 U discloses a sealing structure for a sewing machine, comprising a sewing head, an oil seal, a driver, and an oil return channel. The oil return channel is located on the sewing head, the oil seal is mounted on the sewing head, and the driver's shaft passes through the oil seal and is fixed to the sewing head. The oil return channel communicates with the inner cavity of the sewing head. This invention achieves double protection for oil sealing through double oil seals. When one oil seal fails, a small amount of leaked oil is recovered through the oil return channel, completely preventing oil leakage. This significantly improves sealing reliability and durability, eliminates the need for sealant, and facilitates disassembly.

[0004] However, during the implementation of the relevant technology, the sealing structure of the sewing machine mentioned above was found to have the following problems: the device cannot disassemble and install the sewing machine as a whole, making maintenance inconvenient; at the same time, the sealing structure cannot store the sewing machine as a whole, and its dust and ash prevention effect is limited. Therefore, we have proposed a sealing structure for sewing machines. Utility Model Content

[0005] This utility model proposes a sealing structure for a sewing machine, which solves the problems in related technologies such as the inconvenience of disassembling and repairing the sewing machine as a whole, the inability to store the sewing machine as a whole, and the limited dust and ash prevention effect.

[0006] The technical solution of this utility model is as follows:

[0007] A sealing structure for a sewing machine includes a sealing body, a sewing machine chassis, and a storage cavity. The storage cavity is located at the center of the sealing body. An electric cylinder is installed at the bottom of the storage cavity, and a base is installed at the top of the electric cylinder. The sewing machine body is movably mounted on the electric cylinder via the base. The sewing machine chassis is located at the bottom of the sewing machine body. A movable cavity and a limiting groove are symmetrically arranged on the sidewalls of the storage cavity. A servo motor is installed on the sidewall of the sealing body. The drive shaft of the servo motor extends through the outer wall of the sealing body to the inner wall of the movable cavity and is connected to a lead screw. A first sealing plate and a second sealing plate are symmetrically and movably mounted on the outer wall of the lead screw via a threaded sleeve. Limit blocks are provided on the outer walls of the first and second sealing plates on the side away from the threaded sleeve.

[0008] Preferably, the inner wall of the first sealing plate is provided with a cavity, and the two sides of the cavity are symmetrically provided with sliding grooves. The first sealing plate is movably mounted with a sealing block through the sliding grooves. The outer walls of the two sides of the sealing block are symmetrically provided with sliders, and the top of the slider is provided with a lever.

[0009] Preferably, displacement grooves are symmetrically arranged on both sides of the top of the receiving cavity, and the displacement grooves fit into the first sealing plate and the second sealing plate.

[0010] Preferably, the inner wall of the base is symmetrically provided with movable grooves, and the inner wall of each movable groove is equipped with a sleeve. The base is symmetrically and movably mounted with compression blocks through the sleeves. The outer wall of each compression block is equipped with a spring. A connecting cavity is provided at the center of the base, and the connecting cavity is in communication with the movable groove.

[0011] Preferably, the bottom end of the sewing machine chassis is provided with a connecting block, which is composed of two symmetrical conical blocks and fits into the connecting cavity.

[0012] Preferably, the outer wall of the lead screw is symmetrically provided with external threads in opposite directions, and the inner wall of the threaded sleeve is provided with internal threads that match the external threads.

[0013] Preferably, the cross-section of the limiting block is trapezoidal, and the limiting block and the limiting groove fit together.

[0014] Preferably, a semi-circular arc surface is provided at the center of the first sealing plate and the second sealing plate, and the sealing block has the same radius as the semi-circular arc surface.

[0015] The working principle and beneficial effects of this utility model are as follows:

[0016] In this invention, a sewing machine body, a storage cavity, and an electric cylinder are configured. Activating the electric cylinder moves the base plate at the top of the cylinder outside the storage cavity. The connecting block on the bottom of the sewing machine body is then inserted into the connecting cavity at the center of the base plate. This causes the connecting block to compress one end of a compression block, which in turn compresses a spring. Once the connecting block reaches its bottom, one end of the compression block is reset and locked onto both sides of the connecting block by the elastic force generated by the spring deformation. The weight of the sewing machine body itself, along with the locking and clamping of the compression block, secures the sewing machine body to the bottom of the base plate. Simultaneously, the base plate stably supports the bottom of the sewing machine body. When disassembly and repair are required, simply apply upward force to pull the connecting block out of the inner wall of the base plate, and the sewing machine body can be removed from the top of the base plate. This structure facilitates the disassembly, assembly, and repair of the entire sewing machine body.

[0017] In this invention, a servo motor, lead screw, and limiting groove are used to retract the entire sewing machine body into the storage cavity via an electric cylinder. The servo motor is then activated, driving the lead screw to rotate. The external threads on the outer wall of the lead screw in opposite directions, along with the internal threads on the inner wall of the threaded sleeve, rotate the first and second sealing plates. The limiting groove and limiting block further restrict the movement of the first and second sealing plates, causing them to move out of the displacement grooves on both sides of the storage cavity and engage with the top of the cavity. After engagement, a circular hole appears between the first and second sealing plates. Moving the lever laterally causes the sliding block to move within the groove, blocking the circular hole and sealing the storage cavity. This structure provides a comprehensive seal for the entire sewing machine body, preventing dust and dirt accumulation. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the sealing main structure proposed in this utility model;

[0020] Figure 2 This is a cross-sectional view of the sealing body structure proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of the storage cavity structure proposed in this utility model;

[0022] Figure 4 This is a schematic diagram of the connecting block structure proposed in this utility model;

[0023] Figure 5 This is a schematic diagram of the sealing block structure proposed in this utility model.

[0024] In the diagram: 1. Sealing body; 2. Sewing machine body; 3. Sewing machine chassis; 4. Storage cavity; 5. Servo motor; 6. Lead screw; 7. Movable cavity; 8. Threaded sleeve; 9. First sealing plate; 10. Second sealing plate; 11. Limiting groove; 12. Limiting block; 13. Electric cylinder; 14. Displacement groove; 15. Base platform; 16. Movable groove; 17. Sleeve; 18. Compression block; 19. Spring; 20. Connecting cavity; 21. Connecting block; 22. Slide groove; 23. Sealing block; 24. Sliding block; 25. Lever. Detailed Implementation

[0025] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0026] Example 1: As Figures 1-5 As shown, this embodiment proposes a sealing structure for a sewing machine, including a sealing body 1, a sewing machine chassis 3, and a storage cavity 4. The storage cavity 4 is located at the center of the sealing body 1. An electric cylinder 13 is installed at the bottom of the storage cavity 4, and a base 15 is installed at the top of the electric cylinder 13. The sewing machine body 2 is movably mounted on the electric cylinder 13 via the base 15. The sewing machine chassis 3 is located at the bottom of the sewing machine body 2. The side walls of the storage cavity 4 are symmetrically provided with a movable cavity 7 and a limiting groove 11. A servo motor 5 is installed on the side wall of the sealing body 1. The drive shaft of the servo motor 5 extends through the outer wall of the sealing body 1 to the inner wall of the movable cavity 7 and is connected to a lead screw 6. The outer wall of the lead screw 6 is symmetrically and movably mounted with a first sealing plate 9 and a second sealing plate 10 via a threaded sleeve 8. Limiting blocks 12 are provided on the outer walls of the first sealing plate 9 and the second sealing plate 10 on the side away from the threaded sleeve 8.

[0027] In this embodiment, the inner wall of the base 15 is symmetrically provided with movable grooves 16, and sleeves 17 are installed on the inner wall of each movable groove 16. Compression blocks 18 are symmetrically and movably installed on the base 15 through the sleeves 17. Springs 19 are installed on the outer wall of each compression block 18. A connecting cavity 20 is provided at the center of the base 15, and the connecting cavity 20 is in communication with the movable grooves 16.

[0028] In this embodiment, a connecting block 21 is provided at the bottom of the sewing machine chassis 3. The connecting block 21 is composed of two symmetrical conical blocks, and the connecting block 21 fits into the connecting cavity 20.

[0029] Specific examples Figure 1 , Figure 3 and Figure 4As shown, when using this structure, the electric cylinder 13 is activated, and the base 15 at the top of the electric cylinder 13 is moved out of the storage cavity 4. The connecting block 21 set on the base 15 at the bottom of the sewing machine body 2 is aligned with the connecting cavity 20 at the center of the base 15 and inserted, so that the two sides of the connecting block 21 squeeze one end of the compression block 18 to compress the spring 19. When the connecting block 21 moves to its bottom, one end of the compression block 18 will be reset and locked on both sides of the connecting block 21 by the elastic force generated by the deformation of the spring 19, thus fixing it. The sewing machine body 2 is fixedly installed at the bottom of the base 15 by the weight of the sewing machine body 2 itself and the locking and clamping of the compression block 18. At the same time, the base 15 stably supports the bottom of the sewing machine body 2. When disassembly and repair are required, it is only necessary to exert upward force to pull the connecting block 21 out from the inner wall of the base 15 to remove the sewing machine body 2 from the top of the base 15. This structure facilitates the disassembly and repair of the sewing machine body 2 as a whole.

[0030] Example 2: The inner wall of the first sealing plate 9 is provided with a cavity, and the two sides of the cavity are symmetrically provided with sliding grooves 22. The sealing plate 9 is movably installed with a sealing block 23 through the sliding grooves 22. The outer walls of the two sides of the sealing block 23 are symmetrically provided with sliders 24, and the top of the slider 24 is provided with a lever 25.

[0031] In this embodiment, displacement grooves 14 are symmetrically arranged on both sides of the top of the storage cavity 4, and the displacement grooves 14 fit into the first sealing plate 9 and the second sealing plate 10.

[0032] In this embodiment, the outer wall of the lead screw 6 is symmetrically provided with external threads in opposite directions, and the inner wall of the threaded sleeve 8 is provided with internal threads that match the external threads.

[0033] In this embodiment, the cross-section of the limiting block 12 is trapezoidal, and the limiting block 12 and the limiting groove 11 fit together.

[0034] In this embodiment, a semi-circular arc surface is provided at the center of the first sealing plate 9 and the second sealing plate 10, and the sealing block 23 has the same radius as the semi-circular arc surface.

[0035] Specific examples Figure 1 , Figure 2 and Figure 5As shown, when using this structure, the sewing machine body 2 is retracted into the storage cavity 4 by resetting the electric cylinder 13. The servo motor 5 is started, which drives the lead screw 6 to rotate. The external threads on the outer wall of the lead screw 6 in opposite directions and the internal threads on the inner wall of the threaded sleeve 8 drive the first sealing plate 9 and the second sealing plate 10 to rotate. The limiting groove 11 and the limiting block 12 limit the first sealing plate 9 and the second sealing plate 10, causing the first sealing plate 9 and the second sealing plate 10 to move out of the displacement grooves 14 on both sides of the storage cavity 4 and engage with the top of the storage cavity 4. After engagement, there will be a round hole in the middle of the first sealing plate 9 and the second sealing plate 10. The lever 25 is moved horizontally, and the slider 24 causes the sealing block 23 to move horizontally in the groove 22 to block the round hole, thus sealing the storage cavity 4. This structure can seal the entire sewing machine body 2 in all directions, preventing dust and dirt.

[0036] Working principle: In use, start the electric cylinder 13 to move the base 15 at the top of the electric cylinder 13 out of the storage cavity 4. Align the connecting block 21 on the base 15 of the sewing machine body 2 with the connecting cavity 20 at the center of the base 15 and insert it. This causes the connecting block 21 to compress one end of the compression block 18 on both sides, compressing the spring 19. Once the connecting block 21 reaches its bottom, one end of the compression block 18 will reset and engage with both sides of the connecting block 21 through the elastic force generated by the deformation of the spring 19, thus fixing it in place. The weight of the sewing machine body 2 itself and the engagement of the compression block 18 secure the sewing machine body 2 to the bottom of the base 15, while the base 15 stably supports the bottom of the sewing machine body 2. The electric cylinder 13 then resets and retracts the entire sewing machine body 2 into the storage cavity 4. Start the servo motor 5, which drives the lead screw 6 to rotate. The opposite direction of the outer wall of the lead screw 6... The threaded drive and the internal thread on the inner wall of the threaded sleeve 8 drive the first sealing plate 9 and the second sealing plate 10 to rotate. Then, the limiting groove 11 and the limiting block 12 limit the first sealing plate 9 and the second sealing plate 10, causing the first sealing plate 9 and the second sealing plate 10 to move out of the displacement grooves 14 on both sides of the storage cavity 4 and engage with the top of the storage cavity 4. After engagement, there will be a round hole in the middle of the first sealing plate 9 and the second sealing plate 10. By moving the lever 25 horizontally, the slider 24 causes the sealing block 23 to move horizontally in the sliding groove 22 to block the round hole, thus forming a sealed state in the storage cavity 4. This protects the sewing machine body 2 stored inside from dust and dirt. When disassembly and repair are required, it is only necessary to exert upward force to pull the connecting block 21 out from the inner wall of the base 15 to remove the sewing machine body 2 from the top of the base 15. This sealing structure can store the sewing machine body 2, prevent dust and dirt, and facilitate disassembly.

[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A sealing structure for a sewing machine, comprising a sealing body (1), a sewing machine chassis (3), and a storage cavity (4), characterized in that: The sealing body (1) has a storage cavity (4) at its center. An electric cylinder (13) is installed at the bottom of the storage cavity (4). A base (15) is installed at the top of the electric cylinder (13). The sewing machine body (2) is movably installed on the electric cylinder (13) through the base (15). A sewing machine chassis (3) is installed at the bottom of the sewing machine body (2). A movable cavity (7) and a limiting groove (11) are symmetrically arranged on the side wall of the storage cavity (4). A servo motor (5) is installed on the side wall of the sealing body (1). The drive shaft of the servo motor (5) extends through the outer wall of the sealing body (1) to the inner wall of the movable cavity (7) and is connected to a lead screw (6). A first sealing plate (9) and a second sealing plate (10) are symmetrically and movably installed on the outer wall of the lead screw (6) through a threaded sleeve (8). A limiting block (12) is provided on the outer wall of the first sealing plate (9) and the second sealing plate (10) on the side away from the threaded sleeve (8).

2. The sealing structure of a sewing machine according to claim 1, characterized in that, The inner wall of the first sealing plate (9) is provided with a cavity, and the two sides of the cavity are symmetrically provided with sliding grooves (22). The first sealing plate (9) is movably installed with a sealing block (23) through the sliding grooves (22). The outer walls of the two sides of the sealing block (23) are symmetrically provided with sliders (24), and the top of the slider (24) is provided with a lever (25).

3. The sealing structure of a sewing machine according to claim 2, characterized in that, The storage cavity (4) has symmetrical displacement grooves (14) on both sides of its top end, and the displacement grooves (14) fit into the first sealing plate (9) and the second sealing plate (10).

4. The sealing structure of a sewing machine according to claim 2, characterized in that, The inner wall of the base (15) is symmetrically provided with movable grooves (16), and sleeves (17) are installed on the inner wall of each movable groove (16). Compression blocks (18) are symmetrically installed on the base (15) through the sleeves (17). Springs (19) are installed on the outer wall of each compression block (18). A connecting cavity (20) is provided at the center of the base (15), and the connecting cavity (20) is connected to the movable grooves (16).

5. The sealing structure of a sewing machine according to claim 3, characterized in that, The bottom end of the sewing machine chassis (3) is provided with a connecting block (21), which is composed of two symmetrical conical blocks and fits into the connecting cavity (20).

6. The sealing structure of a sewing machine according to claim 5, characterized in that, The outer wall of the lead screw (6) is symmetrically provided with external threads in opposite directions, and the inner wall of the threaded sleeve (8) is provided with internal threads that match the external threads.

7. The sealing structure of a sewing machine according to claim 6, characterized in that, The cross-section of the limiting block (12) is trapezoidal, and the limiting block (12) and the limiting groove (11) fit together.

8. The sealing structure of a sewing machine according to claim 5, characterized in that, The first sealing plate (9) and the second sealing plate (10) are provided with a semi-circular arc surface at their center positions, and the sealing block (23) has the same radius as the semi-circular arc surface.

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