A thread trimming device for a lasting machine

Abstract

The utility model discloses a kind of line shearing devices of pulling machine, belong to pulling machine field, to solve the problems such as high cost, poor stability, use is limited and inconvenient maintenance of traditional cylinder driving line shearing device. The device includes feeding disc, fixed knife, moving knife and driving device, driving device contains driving shaft, crank, connecting rod and electromagnet telescopic device;Driving shaft is connected with moving knife by passing the center of feeding disc, and the telescopic spindle of electromagnet telescopic device is converted into driving shaft rotation by connecting rod, crank with linear reciprocating motion, drives moving knife swing and shears line. The device is driven by electromagnet, compact and stable structure, improves efficiency and line shearing quality.

Description

Technical Field

[0001] This utility model relates to the field of stretching machines, specifically to a thread-cutting device for stretching machines. Background Technology

[0002] In existing lasting machine technology, the thread-cutting device generally adopts a cylinder-driven structure. For example, a thread-cutting mechanism for a lasting machine disclosed in 2019215269269 uses a cylinder to drive a movable blade in conjunction with a fixed blade to cut the thread. However, this structure has the following drawbacks:

[0003] 1. High cost and complex maintenance: Cylinder drive requires auxiliary equipment such as air compressor, air pipe and solenoid valve, which increases the customer's initial investment cost and the difficulty of later maintenance. At the same time, the air pipe layout affects the appearance of the machine.

[0004] 2. Poor wire cutting stability: Air pressure fluctuations can easily lead to wire cutting time differences and instability, and the cylinder piston seal ring is prone to wear, requiring frequent replacement, which affects production efficiency.

[0005] 3. Limited operating environment: The tracheal tube layout places additional requirements on the machine's operating space and environment, such as avoiding tracheal tube bends or exposure to harsh environments.

[0006] 4. Inconvenient maintenance and adjustment: The cylinder and related components are installed in scattered locations, and many parts need to be disassembled during adjustment, which increases the difficulty of operation for users. Utility Model Content

[0007] In view of the above, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a wire cutting device for a stretching machine, so as to solve the problems of unstable wire cutting function, high cost, limited use environment, inconvenient maintenance and adjustment, and poor appearance of the existing stretching machine.

[0008] This solution provides a wire-cutting device for a laminating machine, comprising a feeding disc, a fixed blade extending into the feeding disc, a movable blade rotatably disposed within the feeding disc, and a drive device for driving the movable blade to perform the wire-cutting function. The drive device includes a drive shaft, a crank, a connecting rod, and an electromagnet telescopic device. The drive shaft passes through the center of the feeding disc and is connected to the movable blade. The crank is located at the end of the drive shaft. The electromagnet telescopic device has a telescopic main shaft, which is connected to the crank via a connecting rod. The linear reciprocating motion of the telescopic main shaft is converted into the rotational motion of the drive shaft via the connecting rod and crank, driving the movable blade to swing and cut the wire.

[0009] Furthermore, the drive shaft is fitted with a shaft tube, and the two are rotatably connected by bearings; the feed tray is fixed to the shaft tube.

[0010] Furthermore, a movable tool holder is provided, which includes a shaft tube clamping part and a guide rail part. The shaft tube clamping part is provided with a U-shaped clamping opening and is fixed to the end of the drive shaft by bolts. The guide rail part extends radially from the shaft tube clamping part and is provided with a guide rail on its surface. The bottom of the movable tool is provided with a sliding groove that matches the guide rail.

[0011] Furthermore, the moving blade has a first oblong hole, and the guide rail has a first threaded hole corresponding to the first oblong hole; the moving blade is pressed and fixed to the guide rail by a bolt passing through the first oblong hole and screwing into the first threaded hole.

[0012] Furthermore, a fixed tool holder is provided, the fixed tool holder is provided with a square boss, the tail of the fixed tool is provided with a matching rectangular positioning groove, the fixed tool is fixed on the square boss, and the tail of the fixed tool is provided with a second waist-shaped hole, the square boss is provided with a second threaded hole corresponding to the second waist-shaped hole; the fixed tool is pressed and fixed on the square boss by a bolt passing through the second waist-shaped hole and screwing into the second threaded hole. Beneficial effects

[0013] 1. Optimized drive structure: The electromagnet telescopic device replaces the traditional cylinder, and the linear motion is converted into rotational motion through the crank-connecting rod mechanism, so as to realize the precise swing of the moving blade to cut the wire. The structure is compact and highly stable.

[0014] 2. Dual-shaft tube design: The drive shaft and the tube are connected by bearings to achieve independent drive for feeding and wire cutting functions, reducing mutual interference and improving work efficiency.

[0015] 3. Optimized design for moving blades:

[0016] The moving tool holder is fixed to the drive shaft via a U-shaped clamping port, making it easy to disassemble and replace;

[0017] The guide rail and slide groove are fitted with an oblong hole to achieve stepless adjustment of the moving tool and adjust the fit clearance between the moving tool and the fixed tool.

[0018] 4. Fixed tool optimization design:

[0019] Innovative positioning structure: The square boss of the fixed blade holder cooperates with the rectangular positioning groove of the moving blade to ensure the installation accuracy of the fixed blade and improve the quality of wire cutting;

[0020] The waist-shaped hole adjustment structure can adjust the clearance between the moving and fixed blades. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present application;

[0022] Figure 2 This is a cross-sectional structural diagram of the drive shaft and shaft tube of this application;

[0023] Figure 3This is an exploded structural diagram of the drive shaft and shaft tube of this application;

[0024] Figure 4 This is a schematic diagram of the moving tool assembly structure of this application;

[0025] Figure 5 This is a schematic diagram of the fixed tool assembly structure of this application;

[0026] Reference numerals: 1. Feeding tray; 2. Fixed blade; 201. Rectangular positioning groove; 202. Second oblong hole; 3. Moving blade; 301. Slide groove; 302. First oblong hole; 4. Drive shaft; 5. Crank; 6. Connecting rod; 7. Electromagnetic telescopic device; 701. Telescopic spindle; 8. Shaft tube; 9. Bearing; 10. Moving blade holder; 1001. Shaft tube clamping part; 1002. Guide rail part; 1003. First threaded hole; 11. Fixed blade holder; 11. Square boss; 1101. Second threaded hole; 1102. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Reference Figures 1 to 5 The device shown is a wire cutting device for a slitting machine. It includes a feeding plate 1, a fixed blade 2, a moving blade 3 and a drive device. The components work together to complete the wire cutting action.

[0029] Among them, the drive unit, as the core power component, adopts a combination scheme of electromagnet telescopic device 7 plus crank 5 and connecting rod 6 mechanism to replace the traditional cylinder drive mode.

[0030] The structure of the drive unit includes:

[0031] Drive shaft 4: It runs through the center of the feed tray 1 and is fixedly connected to the moving knife 3 at its end, serving as the core carrier for power transmission.

[0032] Crank 5: Fixed to the end of drive shaft 4, converting rotational motion into reciprocating motion of connecting rod 6.

[0033] Link 6: Connects crank 5 and telescopic main shaft 701 of electromagnet telescopic device 7, forming an intermediate hub for motion transmission.

[0034] Electromagnetic telescopic device 7: provides linear reciprocating power. Its telescopic main shaft 701 drives the crank 5 to rotate through the connecting rod 6, thereby causing the drive shaft 4 to change angle, and finally driving the moving blade 3 to realize the swing cutting action.

[0035] In this embodiment, in order to achieve independent operation of the feeding and wire cutting functions, the device adopts a nested double-shaft tube 8 design, which includes a shaft tube 8, which is sleeved on the outside of the drive shaft 4, and forms a relatively rotatable connection structure with the drive shaft 4 through the bearing 9.

[0036] In terms of functional division, the feeding plate 1 is rigidly fixed to the shaft tube 8 and is responsible for completing the feeding action; the drive shaft 4 independently drives the moving blade 3 to realize the wire cutting function.

[0037] This design completely solves the problem of mutual interference between feeding and wire cutting actions in traditional structures, significantly improving the working efficiency of the equipment.

[0038] In this embodiment, the moving tool 3 is equipped with a moving tool holder 10, which is designed as an integrated structure of a shaft tube clamping part 1001 and a guide rail part 1002. The shaft tube clamping part 1001 adopts a U-shaped opening design, which can be quickly and tightly fixed to the end of the drive shaft 4 by bolts. Compared with the traditional key connection structure, the disassembly and replacement efficiency is higher. The guide rail part 1002 extends radially from the shaft tube clamping part 1001 and has a guide rail machined on its surface. The bottom of the moving tool 3 is provided with a matching sliding groove 301. Through the sliding cooperation of the two, a first oblong hole 302 is opened on the moving tool 3, and a first threaded hole 1003 is provided at the corresponding position of the guide rail part 1002. By adjusting the position of the bolt passing through the oblong hole, the stepless adjustment of the fit clearance between the moving tool 3 and the fixed tool 2 can be realized.

[0039] In this embodiment, the fixed tool 2 is equipped with a fixed tool holder 11, the fixed tool holder 11 is provided with a square boss 1101, and a matching rectangular positioning groove 201 is machined at the tail of the fixed tool 2. The fixed tool 2 is accurately positioned by the concave-convex fit. A second waist-shaped hole 202 is opened at the tail of the fixed tool 2, and a second threaded hole 1102 is provided correspondingly on the square boss 1101. The fixed tool 2 is fixed by bolt connection.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wire-cutting device for a sheet forming machine, comprising a feeding disc (1), a fixed blade (2) extending into the feeding disc (1), a movable blade (3) rotatably disposed within the feeding disc (1), and a driving device for driving the movable blade (3) to perform the wire-cutting function; characterized in that The driving device includes an electromagnet telescopic device (7) that provides power.

2. The thread-cutting device for a stretching machine according to claim 1, characterized in that: The driving device also includes The drive shaft (4), crank (5), and connecting rod (6) are provided. The drive shaft (4) passes through the center of the feed tray (1) and is connected to the moving knife (3). The crank (5) is located at the end of the drive shaft (4). The electromagnet telescopic device (7) is provided with a telescopic main shaft (701). The telescopic main shaft (701) and the crank (5) are connected by the connecting rod (6). The linear reciprocating motion of the telescopic main shaft (701) is converted into the rotational motion of the drive shaft (4) through the connecting rod (6) and the crank (5), which drives the moving knife (3) to swing and cut the wire.

3. The thread-cutting device for a stretching machine according to claim 2, characterized in that: The drive shaft (4) is fitted with a shaft tube (8), and the two are rotatably connected by a bearing (9); the feed plate (1) is fixed to the shaft tube (8).

4. The thread-cutting device for a stretching machine according to claim 2, characterized in that: A movable tool holder (10) is provided. The movable tool holder (10) includes a shaft tube clamping part (1001) and a guide rail part (1002). The shaft tube clamping part (1001) is provided with a U-shaped clamping opening and is fixed to the end of the drive shaft (4) by bolts. The guide rail part (1002) extends radially from the shaft tube clamping part (1001) and its surface is provided with a guide rail. The bottom of the movable tool (3) is provided with a sliding groove (301) that matches the guide rail.

5. The thread-cutting device for a stretching machine according to claim 4, characterized in that: The moving blade (3) has a first waist-shaped hole (302), and the guide rail (1002) has a first threaded hole (1003) corresponding to the first waist-shaped hole (302); the moving blade (3) is pressed and fixed to the guide rail (1002) by a bolt passing through the first waist-shaped hole (302) and screwing into the first threaded hole (1003).

6. The thread-cutting device for a stretching machine according to claim 2, characterized in that: A fixed blade holder (11) is provided, the fixed blade holder (11) is provided with a square boss (1101), the tail of the fixed blade (2) is provided with a matching rectangular positioning groove (201), the fixed blade (2) is fixed on the square boss (1101), and the tail of the fixed blade (2) is provided with a second waist-shaped hole (202), the square boss (1101) is provided with a second threaded hole (1102) corresponding to the second waist-shaped hole (202); the fixed blade (2) is pressed and fixed on the square boss (1101) by a bolt passing through the second waist-shaped hole (202) and screwing into the second threaded hole (1102).

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