Sewing machine capable of lifting needle head assembly

Abstract

The sewing machine comprises a needle frame and a table body, a sewing mechanism is arranged at the top of the table body, the needle frame is installed on one side of the sewing mechanism, a fixing groove is formed in the top of the table body, a movable part is installed in the fixing groove, the needle frame is located above the movable part, and the movable part comprises a base and a shuttle hook. The shuttle hook is arranged in the base, one side of the base is in sliding fit and rotating fit with a tooth frame, two sets of teeth are arranged at the top end of the tooth frame, the teeth penetrate through the top of the base and correspond to the needle frame, a transmission mechanism is arranged on one side of the base, and a fixing frame is arranged at the bottom of the table body. Through the arrangement of the first rotating rod and the transmission mechanism, when the sewing mechanism is used for sewing, the first rotating rod can drive the tooth frame to rotate back and forth through hinging, and the transmission mechanism drives the tooth frame to move up and down, so that the tooth frame can drive the two groups of teeth to swing, ascend and descend, the teeth are subjected to cloth feeding and tooth lifting, the structure is reasonable, and the practicability is high. And the condition of matching errors is reduced.

Description

Technical Field

[0001] This utility model relates to the field of sewing machine technology, and specifically to a sewing machine with a raised needle assembly. Background Technology

[0002] A sewing machine is a machine that uses sewing thread to create stitches on fabric, allowing one or more layers of fabric to interweave or sew together. When sewing, a sewing machine often requires actions such as feeding the fabric, cutting the thread, and raising the presser foot. Accordingly, a sewing machine has a fabric feeding mechanism, a thread cutting mechanism, and a presser foot raising mechanism.

[0003] In the existing technology, due to the limitations of the sewing machine structure and transmission method, the feeding and lifting of the needle are carried out by the back and forth of the needle holder. The movement of the needle holder in the two directions of feeding and lifting is prone to coordination errors. Different forces are required to control the feeding and lifting of the needle holder to improve the convenience and efficiency of sewing. There is an urgent need to design a sewing machine with a raised needle assembly to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a sewing machine with an elevated needle assembly to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A sewing machine with an elevated needle assembly includes a needle holder and a table. A sewing mechanism is mounted on the top of the table, and the needle holder is installed on one side of the sewing mechanism. A fixing groove is formed on the top of the table, and a movable component is installed in the fixing groove. The needle holder is located above the movable component. The movable component includes a base and a shuttle. The shuttle is disposed in the base. A feed dog is slidably and rotatably engaged with one side of the base. Two sets of teeth are provided at the top of the feed dog, penetrating the top of the base and corresponding to the needle holder. A transmission mechanism is provided on one side of the base. A fixing frame is provided at the bottom of the table, and a drive mechanism is provided within the fixing frame. The drive mechanism cooperates with the movable component, and the transmission mechanism cooperates with the feed dog. A first rotating rod is hinged to one end of the feed dog. The transmission mechanism and the first rotating rod are connected to the sewing mechanism.

[0007] Furthermore, a rotating groove is provided on one side of the base, and an eccentric rotating ring is rotatably fitted in the rotating groove. A needle roller bearing is provided on the eccentric rotating ring. A fixing pin is slidably fitted and rotatably fitted in the dental frame. The fixing pin is inserted into the needle roller bearing. A fixing cover corresponding to the dental frame is installed at one end of the base, and a fixing bolt is provided on the fixing cover.

[0008] Furthermore, the transmission mechanism includes a second rotating rod and a cam. The cam is mounted on one end of the second rotating rod, and a support rod is rotatably engaged at one end of the cam. The fixing pin passes through the gear frame via one end of the support rod.

[0009] Furthermore, one end of the dental frame is rotatably fitted with a hinge rod, and one end of the first rotating rod is equipped with a swing element, with one end of the hinge rod rotatably fitted with one end of the swing element.

[0010] Furthermore, a fixing plate is installed at the bottom of the table body, and the first rotating rod and the second rotating rod are rotatably fitted within the fixing plate. One end of the first rotating rod and one end of the second rotating rod are both connected to the sewing mechanism.

[0011] Furthermore, the drive mechanism includes a transmission rod rotatably fitted within a fixed frame, a first transmission wheel and a second transmission wheel sleeved around the transmission rod, a transmission wheel corresponding to the shuttle inside the movable component, a chain sleeved between the first transmission wheel and the transmission wheel, and a synchronous belt between the second transmission wheel and the sewing mechanism.

[0012] In the above technical solution, the sewing machine with a raised needle assembly provided by this utility model has the following beneficial effects:

[0013] By incorporating a first rotating rod and a transmission mechanism, the first rotating rod, through a hinge, drives the toothed frame to rotate back and forth during sewing. This, in turn, causes the transmission mechanism to move the toothed frame up and down, enabling the toothed frame to swing and move up and down along with two sets of teeth. This allows the teeth to feed and lift the fabric. The structure is reasonable, reducing the possibility of misalignment. Furthermore, the base elevates the needle holder and the base above the table surface, ensuring the operating point remains at a comfortable height, thus improving ease of operation and sewing efficiency. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 This is a schematic diagram of a sewing machine structure provided for an embodiment of a sewing machine with a needle-raising assembly according to the present invention.

[0016] Figure 2 This is a schematic diagram of the drive mechanism structure provided in an embodiment of a sewing machine with a needle-raising assembly according to the present invention.

[0017] Figure 3This is a schematic diagram of the base structure provided for an embodiment of a sewing machine with a needle-raising assembly according to the present invention.

[0018] Figure 4 This is a schematic diagram of the transmission mechanism structure provided in an embodiment of a sewing machine with a needle-raising assembly according to the present invention.

[0019] 1. Needle holder; 2. Moving part; 21. Base; 22. Rotating groove; 23. Fixed cover; 3. Tooth holder; 31. Tooth; 32. Support rod; 33. Fixed pin; 34. Eccentric rotating ring; 35. Hinge rod; 36. First rotating rod; 37. Swinging part; 4. Transmission mechanism; 41. Second rotating rod; 42. Cam; 5. Drive mechanism; 51. Transmission rod; 52. First transmission wheel; 53. Second transmission wheel; 6. Table body; 7. Fixed frame; 8. Fixed plate. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0021] like Figure 1-4 As shown in the figure, this utility model provides a sewing machine with a raised needle assembly.

[0022] The device includes a needle holder 1 and a table body 6. A sewing mechanism is installed on the top of the table body 6. The needle holder 1 is installed on one side of the sewing mechanism. A fixing groove is opened on the top of the table body 6, and a movable part 2 is installed in the fixing groove. The needle holder 1 is located above the movable part 2. The movable part 2 includes a base 21 and a shuttle. The shuttle is set in the base 21. A toothed frame 3 is slidably and rotatably fitted on one side of the base 21. Two sets of teeth 31 are set at the top of the toothed frame 3. The teeth 31 penetrate the top of the base 21 and correspond to the needle holder 1. A transmission mechanism 4 is set on one side of the base 21. A fixing frame 7 is set at the bottom of the table body 6. A drive mechanism 5 is set in the fixing frame 7. The drive mechanism 5 cooperates with the movable part 2. The transmission mechanism 4 cooperates with the toothed frame 3. A first rotating rod 36 is hinged to one end of the toothed frame 3. The transmission mechanism 4 and the first rotating rod 36 are connected to the sewing mechanism.

[0023] Reference Figure 4In this embodiment, a rotating groove 22 is provided on one side of the base 21. An eccentric rotating ring 34 is rotatably fitted in the rotating groove 22. A needle roller bearing is provided on the eccentric rotating ring 34. A fixing pin 33 is slidably fitted and rotatably fitted in the dental frame 3. The fixing pin 33 is inserted into the needle roller bearing. A fixing cover 23 corresponding to the dental frame 3 is installed at one end of the base 21. A fixing bolt is provided on the fixing cover 23. Through the fixed pin 33, the fixing pin 33 can pass through the dental frame 3 and connect with the eccentric rotating ring 34, so that the dental frame 3 can rotate along the circumference of the fixing pin 33. The fixing pin 33 can move up and down within a limited position through the eccentric rotating ring 34, so that the dental frame 3 can move up and down. The fixing cover 23 can cover the dental frame 3 after it is installed.

[0024] Reference Figure 4 In this embodiment, the transmission mechanism 4 includes a second rotating rod 41 and a cam 42. The cam 42 is mounted on one end of the second rotating rod 41, and a support rod 32 is rotatably fitted to one end of the cam 42. A fixing pin 33 passes through one end of the support rod 32 and through the tooth frame 3. The second rotating rod 41 drives the cam 42 to rotate, which in turn drives the support rod 32. The support rod 32 then drives the fixing pin 33 to move up and down, which in turn drives the tooth frame 3 to move up and down.

[0025] Reference Figure 4 In this embodiment, one end of the dental frame 3 is rotatably fitted with a hinge rod 35, and one end of the first rotating rod 36 is equipped with a swing member 37. One end of the hinge rod 35 is rotatably fitted with one end of the swing member 37. Through the hinge rod 35, the rotation of the first rotating rod 36 will drive the swing member 37 to rotate, so that the swing member 37 drives the hinge rod 35, and the hinge rod 35 will drive the dental frame 3 to rotate.

[0026] Reference Figure 2-3 In this embodiment, a fixed plate 8 is installed at the bottom of the table body 6. The first rotating rod 36 and the second rotating rod 41 are both rotatably fitted within the fixed plate 8. One end of the first rotating rod 36 and one end of the second rotating rod 41 are connected to the sewing mechanism. The fixed plate 8 allows the first rotating rod 36 and the second rotating rod 41 to rotate within the fixed plate 8, thus keeping the first rotating rod 36 and the second rotating rod 41 stable.

[0027] Reference Figure 2In this embodiment, the drive mechanism 5 includes a transmission rod 51 rotatably fitted within a fixed frame 7, a first transmission wheel 52 and a second transmission wheel 53 sleeved around the transmission rod 51, and a transmission wheel corresponding to the shuttle within the movable component 2. A chain is sleeved between the first transmission wheel 52 and the transmission wheel, and a synchronous belt is provided between the second transmission wheel 53 and the sewing mechanism. Through the transmission rod 51, the sewing mechanism can drive the second transmission wheel 53 to rotate via the synchronous belt, causing the second transmission wheel 53 to drive the transmission rod 51 to rotate. The transmission rod 51 then drives the first transmission wheel 52 to rotate, and the first transmission wheel 52, in turn, drives the transmission wheel within the movable component 2 to rotate via the chain.

[0028] Working principle: When in use, the fabric is placed on the top of the base 21, and the sewing mechanism is activated to sew, so that the needle holder 1 positions the fabric. During the sewing process, the transmission mechanism 4 and the first rotating rod 36 are activated, so that the transmission mechanism 4 drives the tooth holder 3 to move up and down, and the first rotating rod 36 hinges to drive the tooth holder 3 to swing back and forth, so that the teeth 31 on the tooth holder 3 swing and move up and down. When the teeth 31 swing and move up and down, they pass through the top of the base 21, so that the teeth 31 drive the fabric, and at the same time, the teeth 31 lift the tooth holder 3, so that the device can feed the fabric and lift the teeth synchronously during the sewing process.

[0029] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A sewing machine with an elevated needle assembly, comprising a needle holder (1) and a table (6), characterized in that, The table body (6) is provided with a sewing mechanism on its top. The needle holder (1) is installed on one side of the sewing mechanism. The top of the table body (6) is provided with a fixing groove. A movable part (2) is installed in the fixing groove. The needle holder (1) is located above the movable part (2). The movable part (2) includes a base (21) and a shuttle. The shuttle is set in the base (21). A toothed frame (3) is slidably and rotatably fitted on one side of the base (21). Two sets of teeth (31) are provided at the top of the toothed frame (3). A transmission mechanism (4) is provided on one side of the base (21) and corresponding to the needle holder (1). A fixed frame (7) is provided at the bottom of the table body (6). A drive mechanism (5) is provided inside the fixed frame (7). The drive mechanism (5) cooperates with the movable part (2). The transmission mechanism (4) cooperates with the dental frame (3). A first rotating rod (36) is hinged to one end of the dental frame (3). The transmission mechanism (4) and the first rotating rod (36) are connected to the sewing mechanism.

2. A sewing machine with a raised needle assembly according to claim 1, characterized in that, A rotating groove (22) is provided on one side of the base (21). An eccentric rotating ring (34) is rotatably fitted in the rotating groove (22). A needle roller bearing is provided on the eccentric rotating ring (34). A fixing pin (33) is slidably fitted and rotatably fitted in the dental frame (3). The fixing pin (33) is inserted into the needle roller bearing. A fixing cover (23) corresponding to the dental frame (3) is installed at one end of the base (21). A fixing bolt is provided on the fixing cover (23).

3. A sewing machine with a raised needle assembly according to claim 2, characterized in that, The transmission mechanism (4) includes a second rotating rod (41) and a cam (42). The cam (42) is installed at one end of the second rotating rod (41). One end of the cam (42) is rotatably fitted with a support rod (32). The fixing pin (33) passes through the tooth frame (3) through one end of the support rod (32).

4. A sewing machine with a raised needle assembly according to claim 3, characterized in that, One end of the dental frame (3) is rotatably fitted with a hinge rod (35), and one end of the first rotating rod (36) is fitted with a swing member (37). One end of the hinge rod (35) is rotatably fitted with one end of the swing member (37).

5. A sewing machine with a raised needle assembly according to claim 4, characterized in that, The bottom of the table body (6) is equipped with a fixing plate (8), and the first rotating rod (36) and the second rotating rod (41) are rotatably fitted in the fixing plate (8). One end of the first rotating rod (36) and one end of the second rotating rod (41) are connected to the sewing mechanism.

6. A sewing machine with a raised needle assembly according to claim 1, characterized in that, The drive mechanism (5) includes a transmission rod (51) rotatably fitted in the fixed frame (7), a first transmission wheel (52) and a second transmission wheel (53) sleeved around the transmission rod (51), a transmission wheel corresponding to the shuttle is provided in the movable part (2), a chain is sleeved between the first transmission wheel (52) and the transmission wheel, and a synchronous belt is provided between the second transmission wheel (53) and the sewing mechanism.

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