Shearing mechanism of flat seaming machine

Abstract

The utility model discloses a shearing mechanism of a flat seaming machine, which comprises a support plate and a driving shaft rotatably mounted on one side of the surface of the support plate, a knob is fixed at one end of the driving shaft, and a disc type elastic pull-back structure used for preventing the driving shaft and the knob from rotating clockwise is mounted on the back of the support plate. And a driven shaft is rotationally installed on the other side of the surface of the supporting plate, a gear transmission structure is installed between the driven shaft and the rotary knob, a wiring box is fixed to the portion, below the driven shaft, of the surface of the supporting plate, and a guide pipe is installed in the wiring box in a penetrating mode. According to the flat seaming machine, the space of the flat seaming machine is effectively utilized, the flat seaming machine is more flexible in arrangement on a production site and higher in adaptability, meanwhile, compared with traditional matching structures such as a connecting piece and a lever, the structural design is simpler, use of the matching structures is reduced, and operation, maintenance and replacement are easy.

Description

Technical Field

[0001] The utility model relates to the technical field of thread cutting of a flat sewing machine, in particular to a shearing mechanism of a flat sewing machine. Background Art

[0002] The structure of the interlock sewing machine is mainly composed of a frame, a conveying system, a sewing system, a thread cutting system and a control system. The frame is the supporting structure of the interlock sewing machine, usually made of steel, with sufficient stability and load-bearing capacity. The conveying system is used to feed the bandage into the sewing mechanism, usually composed of a conveyor belt and rollers, which can ensure that the bandage maintains smooth movement during the sewing process. The sewing mechanism is the core part of the interlock sewing machine, which is usually composed of components such as a sewing head, a needle plate, a needle seat and a thread clamp, and can realize efficient and accurate sewing operations. The thread cutting mechanism is used to cut off the thread end after sewing is completed, and is usually composed of a thread cutting knife and a thread cutting device; such as the shearing mechanism of a interlock sewing machine disclosed in the authorization announcement number CN220952433U, including a machine body, a mounting plate is provided on the machine body, a transmission plate and a swing plate are provided on the mounting plate, the transmission plate and the swing plate are both arranged along the length direction of the mounting plate, the transmission plate and the swing plate are both hinged to the mounting plate, a moving knife head is provided at one end of the swing plate, a fixed knife is provided on the machine body corresponding to the moving knife head, the other end of the swing plate is transmission-connected to the transmission plate, and the machine body is also provided with a transmission plate for driving the transmission plate. The driving assembly for rotating the movable plate only needs to drive the transmission plate to rotate through the driving assembly to drive the swing plate to rotate back and forth, so that the movable knife head can cooperate with the fixed knife to cut the thread end. However, the above technical solution still needs to arrange a small cylinder on the interlock sewing machine during use, and the thread end cutting work can be completed by the connecting plate, lever and other matching structures. The shearing mechanism is bulky and complicated, occupying a large working space of the staff. In some production places with limited space, this structural design will hinder the sewing operation of the staff, and the design of the matching structures such as the connecting plate and the lever also increases the complexity of the shearing mechanism. These matching structures are easily affected by vibration and wear and need to be regularly maintained and replaced. Utility Model Content

[0003] The purpose of the utility model is to provide a shearing mechanism for a stretch sewing machine, in which a support plate is arranged at the sewing position of the stretch sewing machine. After the sewing operation is completed, the staff turns the knob to drive the cutter to deflect through the gear transmission structure, and uses the deflection of the cutter to cut the sewing thread in the wiring box. When the user releases the knob, the knob, cutter and other structures will be reset in the disc-type elastic pull-back structure to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a shearing mechanism of a stretch sewing machine, comprising a support plate and a driving shaft rotatably mounted on one side of the support plate surface, a knob being fixed to one end of the driving shaft, a disc-type elastic pullback structure for blocking the clockwise rotation of the driving shaft and the knob being installed on the back side of the support plate, a driven shaft being rotatably mounted on the other side of the support plate surface, a gear transmission structure being installed between the driven shaft and the knob, a wiring box being fixed to the support plate surface below the driven shaft, and a guide tube being installed through the interior of the wiring box, a cutting knife being fixed at a circular arc on one side of the driven shaft surface, and the back side of the cutting knife is in contact with the surface of the wiring box.

[0005] Preferably, two symmetrical right-angle foot supports with through holes are fixed to the front and rear outer walls of the support plate.

[0006] Preferably, the gear transmission structure includes an active gear ring fixed on the outer circumference of the knob, a middle gear rotatably mounted on one side of the support plate surface, and a driven gear plate fixed on the outer circumference of the driven shaft, and the active gear ring, middle gear and driven gear plate are meshed in sequence.

[0007] Preferably, the disc-type elastic pullback structure includes a first T-pin fixed on one side of the back side of the support plate, a turntable installed on one end of the driving shaft, a second T-pin fixed at the edge of the turntable surface, and a tension spring buckled between the second T-pin and the first T-pin.

[0008] Preferably, an arc-shaped recessed portion coaxial with the driven shaft is provided at the top end of the wiring box, and the diameter of the arc-shaped recessed portion is greater than the diameter of the driven gear disc.

[0009] Preferably, the guide tube and wiring box are both made of hard plastic components.

[0010] Preferably, a protective cover for shielding the driven shaft and the middle gear is installed on one side of the surface of the support plate, and an arc portion is provided on the outer wall of the protective cover on the side close to the knob.

[0011] Compared with the prior art, the beneficial effect of the utility model is that the shearing mechanism of the interlock sewing machine is compact by providing a disc-type elastic pullback structure and a cutting knife and other structures that cooperate with each other, and does not occupy too much operating space of the interlock sewing machine. Compared with the traditional shearing mechanism, this design is more compact, and the support plate is arranged at the stitching position of the interlock sewing machine through a right-angle foot support, which effectively utilizes the space of the interlock sewing machine. Its arrangement on the production site is more flexible and more adaptable. At the same time, compared with traditional connecting plates, levers and other cooperating structures, this structural design is simpler, reduces the use of cooperating structures, and is easy to operate, maintain and replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1The three-dimensional structure of the utility model is shown in FIG. Figure 1 ;

[0013] Figure 2 The three-dimensional structure of the utility model is shown in FIG. Figure 2 ;

[0014] Figure 3 This is a schematic diagram of the main structure of the utility model after the protective cover is removed;

[0015] Figure 4 The three-dimensional structure of the utility model is shown in FIG. Figure 3 ;

[0016] Figure 5 It is a side structural schematic diagram of the utility model.

[0017] In the figure: 1. support plate; 2. right-angle foot support; 3. driving shaft; 4. knob; 401. driving gear ring; 5. middle gear; 6. disc-type elastic pullback structure; 601. first T-pin; 602. tension spring; 603. turntable; 604. second T-pin; 7. driven shaft; 8. driven gear disc; 9. wiring box; 901. guide tube; 10. cutter; 11. protective cover. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-5 The utility model provides an embodiment: a shearing mechanism of a flat sewing machine, comprising a support plate 1 and a driving shaft 3 rotatably mounted on one side of the surface of the support plate 1, and two symmetrical right-angle foot supports 2 with through holes are fixed on the front and rear outer walls of the support plate 1;

[0020] A knob 4 is fixed to one end of the driving shaft 3, a disc-type elastic pull-back structure 6 for blocking the driving shaft 3 and the knob 4 from rotating clockwise is installed on the back of the support plate 1, a driven shaft 7 is rotatably installed on the other side of the surface of the support plate 1, a gear transmission structure is installed between the driven shaft 7 and the knob 4, a wiring box 9 is fixed to the surface of the support plate 1 below the driven shaft 7, and a guide tube 901 is installed through the interior of the wiring box 9, a cutter 10 is fixed to the arc on one side of the surface of the driven shaft 7, and the back of the cutter 10 is in contact with the surface of the wiring box 9;

[0021] The gear transmission structure includes an active gear ring 401 fixed on the outer circumference of the knob 4, a middle gear 5 rotatably mounted on one side of the surface of the support plate 1, and a driven gear plate 8 fixed on the outer circumference of the driven shaft 7. The active gear ring 401, the middle gear 5 and the driven gear plate 8 are meshed in sequence. When the staff member turns the knob 4, the knob 4 drives the middle gear 5 to rotate through the active gear ring 401, and the middle gear 5 causes the driven gear plate 8 and the driven shaft 7 to rotate synchronously in the same direction as the knob 4, that is, the swing direction of the cutter 10 is consistent with the screwing direction of the knob 4, so that the staff member can control the swing and shearing action of the cutter 10, and can flexibly adjust the shearing angle and strength;

[0022] The top of the wiring box 9 is provided with an arc-shaped recessed portion co-centered with the driven shaft 7, the diameter of the arc-shaped recessed portion is larger than the diameter of the driven gear plate 8, and the disc-type elastic pull-back structure 6 includes a first T-shaped pin 601 fixed to one side of the back of the support plate 1, a turntable 603 installed at one end of the driving shaft 3, a second T-shaped pin 604 fixed at the edge of the surface of the turntable 603, and a tension spring 602 buckled between the second T-shaped pin 604 and the first T-shaped pin 601. When the driving shaft 3 is driven to rotate by the knob 4, the driving shaft 3 will drive the turntable 603 to rotate. When the second T-pin 604 revolves around the center of the rotating disk 603 and the driving shaft 3, the tension spring 602 is stretched and deformed under the drive of the second T-pin 604. When the staff releases the screwing force on the knob 4, the tension spring 602 pulls the rotating disk 603 and the driving shaft 3 to rotate and reset, and the structures such as the cutter 10 are automatically reset under the action of the disc-type elastic pull-back structure 6. By automatically resetting the cutter 10, the staff is less likely to be injured by accidental misoperation during operation, and the operational safety of the cutting mechanism is ensured;

[0023] The guide tube 901 and the wiring box 9 are both made of hard plastic material. The guide tube 901 allows the suture to pass through stably and be used by the interlock sewing machine.

[0024] A protective cover 11 for shielding the driven shaft 7 and the middle gear 5 is installed on one side of the surface of the support plate 1. A circular arc portion is provided on the outer wall of the protective cover 11 close to the knob 4. The protective cover 11 is used to shield the driven shaft 7, the middle gear 5 and other components to prevent the staff from directly touching the gear transmission structure.

[0025] When the embodiment of the present application is in use, the staff first installs the support plate 1 in the shearing mechanism to the wiring position of the interlock sewing machine, so that the suture used by the interlock sewing machine can be led out from the support plate 1 through the wiring box 9 and the guide tube 901 and used by the sewing mechanism of the interlock sewing machine. When the interlock sewing machine completes the sewing operation, the user manually turns the knob 4 clockwise, then the driving shaft 3 and the knob 4 rotate together, and the rotational power of the knob 4 is synchronously transmitted to the driven shaft 7 in the same direction through the gear transmission structure, so that the driven shaft 7 and the knob 4 rotate synchronously in the same direction. At this time, the disc-type elastic pullback structure 6 on the back of the support plate 1 will be deformed, and the cutter 10 will deflect clockwise with the driven shaft 7 as the center until the blade of the cutter 10 passes the end of the guide tube 901. , so that the seam is cut by the cutter 10. At this time, the staff releases the knob 4, and the disc-type elastic pull-back structure 6 forces the active shaft 3, the knob 4, the driven shaft 7 and the cutter 10 to reset, so that the cutter 10 swings back to the initial position to wait for the next use. The shearing mechanism is small in size and does not occupy too much working space of the interlock sewing machine. Compared with the traditional shearing mechanism, this design is more compact. The support plate 1 is arranged at the seam position of the interlock sewing machine through the right-angle foot support 2, which effectively utilizes the space of the interlock sewing machine. Its arrangement on the production site is more flexible and more adaptable. At the same time, compared with traditional matching structures such as connecting plates and levers, this structural design is simpler, reduces the use of matching structures, and is easy to operate, maintain and replace.

Claims

1. A shearing mechanism of a flat seaming machine, characterized in that: The invention comprises a support plate (1) and a driving shaft (3) rotatably mounted on one side of the surface of the support plate (1); a knob (4) is fixed to one end of the driving shaft (3); a disc-type elastic pull-back structure (6) for blocking the clockwise rotation of the driving shaft (3) and the knob (4) is installed on the back side of the support plate (1); a driven shaft (7) is rotatably mounted on the other side of the surface of the support plate (1); a gear transmission structure is installed between the driven shaft (7) and the knob (4); a wiring box (9) is fixed to the surface of the support plate (1) below the driven shaft (7); a guide tube (901) is installed through the interior of the wiring box (9); a cutting knife (10) is fixed at a circular arc on one side of the surface of the driven shaft (7); the back side of the cutting knife (10) is in contact with the surface of the wiring box (9).

2. A shearing mechanism for a flat seaming machine according to claim 1, characterized in that: Two symmetrical right-angle foot supports (2) with through holes are fixed on the front and rear outer walls of the support plate (1).

3. The shearing mechanism of a flat seaming machine according to claim 1, characterized in that: The gear transmission structure comprises a driving gear ring (401) fixed on the outer peripheral surface of the knob (4), a middle gear (5) rotatably mounted on one side of the surface of the support plate (1), and a driven gear disc (8) fixed on the outer peripheral surface of the driven shaft (7); the driving gear ring (401), the middle gear (5) and the driven gear disc (8) are meshed in sequence.

4. The shearing mechanism of a flat seaming machine according to claim 1, characterized in that: The disc-type elastic pull-back structure (6) comprises a first T-shaped pin (601) fixed to one side of the back side of the support plate (1), a rotating disk (603) installed at one end of the driving shaft (3), a second T-shaped pin (604) fixed at the edge of the surface of the rotating disk (603), and a tension spring (602) buckled between the second T-shaped pin (604) and the first T-shaped pin (601).

5. The shearing mechanism of a flat seaming machine according to claim 3, characterized in that: The top end of the wiring box (9) is provided with an arc-shaped recessed portion co-centered with the driven shaft (7), and the diameter of the arc-shaped recessed portion is greater than the diameter of the driven gear disc (8).

6. The shearing mechanism of a flat seaming machine according to claim 1, characterized in that: The guide tube (901) and the wiring box (9) are both made of hard plastic components.

7. The shearing mechanism of a flat seaming machine according to claim 3, characterized in that: A protective cover (11) for shielding the driven shaft (7) and the middle gear (5) is installed on one side of the surface of the support plate (1), and an arc portion is provided on the outer wall of the protective cover (11) on the side close to the knob (4).

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