Upper die punching rod device of button sewing machine

Abstract

The technical scheme belongs to the technical field of button sewing machines, and particularly relates to an upper die punching rod device of a button sewing machine, which is used for being movably connected to the button sewing machine and comprises an upper pressing rod, the upper punching rod is arranged in the upper pressing rod in a penetrating mode, the upper punching rod is in sliding connection relative to the upper pressing rod, the upper punching rod is provided with a limiting piece, the limiting piece is connected to the upper end portion, penetrating into the sinking groove, of the upper punching rod, and the lower end of the upper punching rod is connected with a punching die; the recoil elastic piece is limited in the sinking groove through a fastener, the two ends of the recoil elastic piece act on the limiting piece and the fastener respectively, the elastic force of the recoil elastic piece pushes the limiting piece to abut against the step face of the sinking groove, and when the upper pressing rod gets close to the sewing material when descending, the elastic force of the recoil elastic piece is used for pushing the stamping die to be matched with the sewing material; rigid impact is effectively absorbed through an elastic buffering mechanism, flexible contact is formed in the stamping process, the button forming quality is guaranteed, rigid collision loss between a die and an equipment body is reduced, and therefore the service life of equipment is prolonged.

Description

Technical Field

[0001] This technical solution relates to the field of button attaching machine technology, and specifically refers to an upper die punching device for a button attaching machine. Background Technology

[0002] A button-attaching machine is an automated sewing device specifically designed for attaching buttons to fabrics such as clothing and bags. It ensures durability by feeding, positioning, and sewing the buttons, using lockstitch or chain stitch. It can accommodate various types of buttons, including flat buttons and buttonhole buttons.

[0003] Existing button-attaching machines use upper and lower dies to rivet buttons during operation. The drive component moves the upper punch up and down through a gear that meshes with the side wall of the upper punch at the drive output end. During stamping, the impact load is directly applied to the end of the upper punch. Due to differences in the thickness and hardness of the garment fabric, overload during stamping in thin material areas can cause damage to the fabric / buttons. In thick material areas, sudden changes in impact force can cause gear tooth breakage and propagation of micro-cracks in the punch. The rigid impact method cannot be adaptively adjusted, and prolonged use can damage the durability and processing consistency of the equipment, reducing its service life. Summary of the Invention

[0004] This technical solution aims to improve the problem of reduced equipment lifespan caused by the inability of the rigid impact load of the upper mold to adaptively adjust in existing button-attaching machines. It provides an upper mold punching device for button-attaching machines.

[0005] The purpose of this technical solution is achieved as follows:

[0006] A punching device for an upper die of a button-attaching machine, movably connected to the button-attaching machine, comprising:

[0007] Upper pressure rod, wherein the upper pressure rod is provided with a recessed groove;

[0008] An upper punch rod is inserted into the upper pressure rod and is slidably connected to the upper pressure rod. The upper punch rod is provided with a limiting member, which is connected to the upper end of the upper punch rod that extends into the sinking groove. A stamping die is connected to the lower end of the upper punch rod.

[0009] The recoil elastic member is confined within the sinking groove by fasteners. The two ends of the recoil elastic member act on the limiting member and the fasteners respectively. Its elastic force pushes the limiting member to press against the stepped surface of the sinking groove. When the upper pressure rod descends, it approaches the seam material. The elastic force of the recoil elastic member is used to push the stamping die to cooperate with the seam material.

[0010] Through the above technical solution, when the upper die punching device of a button-attaching machine is in normal use, the upper pressure rod is movably connected to the button-attaching machine. When the equipment is started, the upper pressure rod moves downward along the axis. Under normal conditions, the elastic force of the anti-jerk elastic element pushes the upper punching rod to maintain its initial position through the contact of the limiting element and the step surface of the sinking section. As the upper pressure rod continues to press down to the contact material stage, the anti-jerk elastic element is compressed between the fastener and the limiting element. At this time, the stamping die connected to the lower end of the upper punching rod adaptively adjusts the impact load under the buffering effect of the anti-jerk elastic element. When the stamping action is completed, the anti-jerk elastic element pushes the upper punching rod to reset. Through the elastic buffering mechanism, rigid impact is effectively absorbed, so that the stamping process forms flexible contact, which not only ensures the button forming quality, but also reduces the rigid collision loss between the die and the main body of the equipment, thereby extending the service life of the equipment.

[0011] Preferably, the stamping die includes:

[0012] The upper mold has a protruding positioning pin;

[0013] A spring clip is disposed on the upper mold and sleeved on the locating pin;

[0014] A nut is fitted onto the outside of the spring clip. The inner wall of the nut has a limiting annular surface. The lower end of the spring clip abuts against the limiting annular surface. The lower end of the upper punch has a connecting groove. When the nut is connected to the upper punch, the upper end of the spring clip is embedded in the connecting groove. The nut presses the spring clip through the limiting annular surface, so that the spring clip is clamped onto the positioning pin.

[0015] Through the above technical solution, the spring clip is first fitted onto the outside of the locating pin of the upper die, and then the nut is threaded onto the outside of the connecting groove at the lower end of the upper punch. When the nut is tightened along the thread, the limiting ring on its inner wall applies radial extrusion force to the upper end of the spring clip, forcing the spring clip to undergo elastic contraction deformation, thereby uniformly tightening the outer wall of the locating pin to form a reliable clamping. The elastic deformation of the spring clip enables the locating pin and the stamping die to be quickly aligned and locked, reducing wear caused by rigid contact. After the nut is loosened, the spring clip automatically springs back to release the locating pin, facilitating quick replacement and maintenance of the die. At the same time, the embedded fit between the connecting groove and the spring clip ensures axial positioning accuracy, suppresses off-center vibration during stamping, and extends the service life of the die assembly.

[0016] Preferably, the inner wall of the connecting groove has a guide ring surface, which causes the connecting groove to be flared outward away from the limiting member, and the spring clip is adapted to the guide ring surface.

[0017] With the above technical solution, when the spring clip is inserted along the guide ring surface of the connecting groove, the flared structure guides the outer wall of the spring clip to form a progressive fit contact with the guide ring surface. The guide ring surface and the limiting ring surface cooperate to cover and limit both ends of the spring clip, thereby improving the stability of the spring clip after installation.

[0018] Preferably, the upper punch has a connecting part located at the end of the upper punch away from the limiting member, and the connecting part has a corresponding connecting groove inside, and the connecting part has an external thread structure for threaded connection of a nut.

[0019] Through the above technical solution, the upper punch of the button-attaching machine can be quickly assembled with the nut through the external thread structure of its lower end connecting part, enabling quick mold replacement and improving maintenance efficiency.

[0020] Preferably, the upper pressure rod is further provided with a positioning groove, the positioning groove is located at the end of the upper pressure rod away from the sinking groove, the positioning groove has a positioning surface on the side opposite to the through end, the connecting part is embedded in the positioning groove, and the positioning surface is used for the connecting part to abut against.

[0021] Through the above technical solution, the positioning surface of the positioning groove forms a hard limiting constraint by axially abutting the end face of the connecting part, thereby limiting the elastic avoidance distance of the upper punch rod relative to the upper pressure rod, reducing the situation where the upper punch rod retracts excessively and causes excessive compression damage to the elastic element, and extending the service life.

[0022] Preferably, the upper pressure rod has a toothed groove on its side wall for meshing with the gear at the output end of the drive device in the button-attaching machine.

[0023] Through the above technical solution, the upper pressure rod forms a precise mesh with the gear at the output end of the drive device through the side wall tooth groove. When the drive gear rotates, the meshing transmission between the tooth groove and the gear tooth profile converts the rotational motion into the linear motion of the upper pressure rod along the axial direction in the button attaching machine. Combined with the buffering effect of the recoil elastic element, a composite drive mechanism is formed, which improves the response speed and stability of the stamping action and reduces the wear of the connection between the drive device and the upper pressure rod.

[0024] The key and beneficial technical effects of this technical solution compared to existing technologies are:

[0025] 1. This technical solution involves installing a recoil elastic element in the recessed groove of the upper pressure rod. The two ends of the recoil elastic element act on the limiting element and the fastener respectively. The elastic force of the recoil elastic element is used to push the stamping die to fit the material, so that the stamping process forms a flexible contact, reduces wear, and extends the service life. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0027] Figure 2This is a partial cross-sectional view of this embodiment;

[0028] Figure 3 This is one of the partial explosion diagrams of this embodiment;

[0029] Figure 4 This is the second schematic diagram of a partial explosion in this embodiment.

[0030] Reference numerals: 1. Upper pressure rod; 2. Lower recess; 3. Upper punch; 4. Limiting component; 5. Stamping die; 51. Upper die; 52. Spring sleeve; 53. Nut; 6. Reverse elastic component; 7. Limiting ring surface; 8. Positioning pin; 9. Connecting groove; 10. Connecting part; 11. External thread structure; 12. Positioning surface; 13. Guide ring surface; 14. Tooth groove; 15. Positioning groove; 16. Fastener. Detailed Implementation

[0031] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0032] Example:

[0033] See Figure 1 An upper die punching device for a button attaching machine is used to be movably connected to the button attaching machine. It includes an upper pressure rod 1, which is rod-shaped. The outer side wall of the upper pressure rod 1 is provided with a plurality of toothed grooves 14. The plurality of toothed grooves 14 are arranged at intervals along the axial direction of the upper pressure rod 1. Existing button attaching machines are usually equipped with a drive device, which includes a drive component (such as a motor) and a gear mounted on the end of its output shaft. The drive device drives the gear to rotate. Through the meshing action of the gear and the toothed grooves 14, the rotational motion of the motor is accurately converted into the axial linear motion of the upper pressure rod 1.

[0034] See Figure 2 and Figure 3The upper pressure rod 1 is equipped with an upper punch rod 3, which is rod-shaped. The upper punch rod 3 passes through the interior of the upper pressure rod 1 and slides in cooperation with the upper pressure rod 1 to form a sliding pair. Specifically, the upper pressure rod 1 has a recessed groove 2 located at the upper end of the upper pressure rod 1. The upper pressure rod 1 also has a positioning groove 15 located at the lower end of the upper pressure rod 1 away from the recessed groove 2. One end of the upper punch rod 3 has a connecting part 10 protruding from it. During assembly, the other end of the upper punch rod 3 away from the connecting part 10 is aligned with the positioning groove 15 and inserted. The rod body passes through the recessed groove 2 along the upper pressure rod 1. The limiting component 4 is connected. In this embodiment, the limiting component 4 can be a gasket. The limiting component 4 can be threaded to the end of the upper punch 3 that passes through the sinking trough 2. The cross-sectional area of ​​the limiting component 4 is adapted to the cross-sectional area of ​​the sinking trough 2. The limiting component 4 abuts against the stepped surface of the sinking trough 2 to form a limiting. The positioning groove 15 has a positioning surface 12 on the side opposite to the through end. The connecting part 10 is embedded in the positioning groove 15. The positioning surface 12 abuts against the connecting part 10 to form a double constraint mechanism, which not only ensures the axial sliding freedom of the upper punch 3, but also effectively prevents it from rotating or detaching.

[0035] A recoil elastic element 6, preferably a return spring, is installed inside the sinking trough 2. The recoil elastic element 6 is fixed inside the sinking trough 2 by a fastener 16, preferably a headless screw. The fastener 16 is threaded to the through end of the sinking trough 2 to prevent the recoil elastic element 6 from detaching from the through opening of the sinking trough 2. The two ends of the recoil elastic element 6 act on the limiting member 4 and the fastener 16 respectively. Based on the fixed position after the fastener 16 is connected, the elastic force of the recoil elastic element 6 causes the upper punch 3 to have a downward sliding tendency, thereby causing the limiting member 4 to press against the stepped surface of the sinking trough 2.

[0036] See Figure 2 and Figure 4 The lower end of the upper punch 3 is connected to a stamping die 5. The stamping die 5 includes a spring sleeve 52 and a nut 53. The spring sleeve 52 is embedded in the nut 53. The inner hole of the nut 53 has a limiting annular surface 7 along its inner wall. The inclined direction of the limiting annular surface 7 makes the through end of the inner hole of the nut 53 flare outward. The lower part of the spring sleeve 52 is adapted to the limiting annular surface 7 and abuts against the limiting annular surface 7. The upper die 51 is provided with a positioning pin 8, which passes through the spring sleeve 52, thereby combining the upper die 51, the spring sleeve 52 and the nut 53.

[0037] The connecting part 10 has an external thread structure 11, and a connecting groove 9 is correspondingly opened on the inner side of the connecting part 10. A guide ring surface 13 is provided along the inner wall of the connecting groove 9. The inclined direction of the guide ring surface 13 makes the connecting groove 9 flared outward from the direction away from the limiting member 4. The nut 53 is threadedly connected to the external thread structure 11 and the connecting part 10. At this time, the upper end of the spring clip 52 is correspondingly embedded in the connecting groove 9. The upper part of the spring clip 52 is adapted to the guide ring surface 13 and abuts against the guide ring surface 13. When the nut 53 is tightened, the limiting ring surface 7 and the guide ring surface 13 cooperate to squeeze the spring clip 52. The spring clip 52 deforms and clamps the positioning pin 8, so that the spring clip 52 is fixedly connected to the upper mold 51.

[0038] The specific work process of this plan is as follows:

[0039] This technical solution connects the upper pressure rod 1 to the button-attaching machine. When the equipment is started, the upper pressure rod 1 moves downward along the axis. Under normal conditions, the elastic force of the recoil elastic element 6 pushes the upper punch rod 3 to maintain its initial position through the contact of the limiting element 4 with the stepped surface of the sinking section. As the upper pressure rod 1 continues to press down to the contact material stage, the recoil elastic element 6 is compressed between the fastener 16 and the limiting element 4. At this time, the stamping die 5 connected to the lower end of the upper punch rod 3 adaptively adjusts the impact load under the buffering effect of the recoil elastic element 6. After the stamping action is completed, the recoil elastic element 6 pushes the upper punch rod 3 to reset. The elastic buffering mechanism effectively absorbs rigid impact, making the stamping process form flexible contact. This not only ensures the button forming quality but also reduces the rigid collision loss between the die and the main body of the equipment, thereby extending the service life of the equipment.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

Claims

1. A punching device for an upper die of a button-attaching machine, movably connected to the button-attaching machine, characterized in that, include: Upper pressure rod (1), the upper pressure rod (1) is provided with a recessed groove (2); An upper punch (3) is inserted into the upper pressure rod (1). The upper punch (3) is slidably connected to the upper pressure rod (1). The upper punch (3) is provided with a limiting member (4). The limiting member (4) is connected to the upper end of the upper punch (3) that extends into the sinkhole (2). The lower end of the upper punch (3) is connected to a stamping die (5). The recoil elastic member (6) is defined in the sinking groove (2) by fastener (16). The two ends of the recoil elastic member (6) act on the limiting member (4) and the fastener (16) respectively. Its elastic force pushes the limiting member (4) to press against the step surface of the sinking groove (2). When the upper pressure rod (1) descends, it approaches the seam material. The elastic force of the recoil elastic member (6) is used to push the stamping die (5) to cooperate with the seam material.

2. The upper die punch device for a button-attaching machine according to claim 1, characterized in that: The stamping die (5) includes: Upper mold (51), wherein the upper mold (51) has a protruding positioning pin (8); A spring clip (52) is disposed on the upper mold (51) and sleeved on the positioning pin (8); A nut (53) is fitted on the outside of the spring clip (52). The inner wall of the nut (53) has a limiting annular surface (7). The lower end of the spring clip (52) abuts against the limiting annular surface (7). The lower end of the upper punch (3) is provided with a connecting groove (9). When the nut (53) is connected to the upper punch (3), the upper end of the spring clip (52) is embedded in the connecting groove (9). The nut (53) squeezes the spring clip (52) through the limiting annular surface (7), so that the spring clip (52) is clamped on the positioning pin (8).

3. The upper die punch device for a button-attaching machine according to claim 2, characterized in that: The connecting groove (9) has a guide ring surface (13) along its inner wall. The guide ring surface (13) causes the connecting groove (9) to be flared outward in the direction away from the limiting member (4). The spring clip (52) is adapted to the guide ring surface (13).

4. The upper die punch device for a button-attaching machine according to claim 2, characterized in that: The upper punch (3) has a connecting part (10), which is located at the end of the upper punch (3) away from the limiting member (4). The connecting part (10) has a corresponding connecting groove (9) inside, and the connecting part (10) has an external thread structure (11) for threaded connection of the nut (53).

5. The upper die punch device for a button-attaching machine according to claim 4, characterized in that: The upper pressure rod (1) is also provided with a positioning groove (15). The positioning groove (15) is located at the end of the upper pressure rod (1) away from the sinking groove (2). The positioning groove (15) has a positioning surface (12) on the side opposite to the through end. The connecting part (10) is embedded in the positioning groove (15). The positioning surface (12) is used for the connecting part (10) to abut against.

6. The upper die punch device for a button-attaching machine according to claim 1, characterized in that: The upper pressure rod (1) has a toothed groove (14) on its side wall for meshing with the gear at the output end of the drive device in the button fastening machine.

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