Thread trimming device for upper pulling machine

Abstract

The utility model discloses a trimming device for an upper pulling machine, which comprises an upper pulling machine main body, a fixed cutter group and a movable cutter group, the fixed cutter group and the movable cutter group are arranged on the upper pulling machine main body, the movable cutter group consists of a movable cutter group driving cylinder and a movable cutter group bearing, and the tail end of a piston rod of the movable cutter group driving cylinder is connected with a push arm. A middle connecting arm is hinged to the tail end of the push arm, a rotating frame is hinged to the tail end of the middle connecting arm, a clamping groove sleeve frame is connected and installed on the rotating frame, the movable cutter set bearing and the rotating frame are fixedly installed together, a clamping groove is formed in the side face of the clamping groove sleeve frame, and an arc-shaped movable blade is installed on the upper groove wall of the clamping groove. The feeding mechanism has the advantages that the feeding mechanism can be installed on an existing upper pulling machine structure, original upper pulling machine parts do not need to be replaced, a needle and thread assembly above the feeding wheel is not interfered, and the pushing connecting arm assembly is high in strength and durable.

Description

Technical Field

[0001] The utility model relates to the field of shearing accessories for lasting machines, in particular to a thread shearing device for lasting machines. Background Art

[0002] The commonly used sewing structure of the lasting machine is provided with two feed wheels. The sides of the shoe upper and other materials to be sewn are clamped between the inner and outer feed wheels, and then the materials are rolled and fed, and sewn by the needle and thread assembly. The existing lasting machines mostly trim the thread manually, which is not efficient. Some lasting machines mechanically cut the thread by adding a shearing assembly. For example, the patent application number 202323067064.7 introduces a shearing assembly for a shrinking bottom seam integrated machine, which cuts the thread by a movable blade and a fixed blade. However, the connecting rod and other accessories quickly frozen by the drive part are all arranged above the feed wheel, and the needle and thread assembly is arranged above the feed wheel. The space is relatively narrow, resulting in the diameter and thickness of accessories such as the connecting rod not being too large, and the strength being reduced. Secondly, the ball bearing is arranged above the feed wheel, and the feed wheel needs to be significantly modified to provide a bearing groove. For the lasting machine that has been working on the production line, its feed wheel needs to be remodified before it can be used, which increases the difficulty and complexity of adding it to the existing lasting machine. Utility Model Content

[0003] The purpose of the present utility model is to provide a thread cutting device for a lasting machine in order to solve the above problems.

[0004] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0005] A wire cutting device for a lasting machine comprises a lasting machine body, a fixed knife group and a movable cutting knife group installed on the lasting machine body, the movable cutting knife group consists of a movable knife group driving cylinder and a movable knife group bearing, the end of the piston rod of the movable knife group driving cylinder is connected to a push arm, the end of the push arm is hinged to an intermediate connecting arm, the end of the intermediate connecting arm is hinged to a rotating frame, a clamping groove sleeve frame is connected and installed on the rotating frame, the movable knife group bearing is fixedly installed together with the rotating frame, a clamping groove is provided on the side of the clamping groove sleeve frame, and an arc-shaped movable blade is installed on the upper groove wall of the clamping groove.

[0006] Furthermore, the fixed knife group consists of a fixed knife holder and an arc-shaped fixed blade mounted on the fixed knife holder. The fixed knife holder is fixed to the lasting machine body by screws, and the arc-shaped fixed blade is fixed to the fixed knife holder by screws.

[0007] Furthermore, an inner feed wheel is rotatably mounted on the outer side of the lasting machine body via a wheel shaft, a top wheel surface of the inner feed wheel is provided with a disc groove, and the arc-shaped fixed blade and the arc-shaped movable blade are both arranged in the disc groove.

[0008] Furthermore, the movable knife assembly bearing is rotatably mounted on the wheel shaft below the inner feeding wheel.

[0009] Furthermore, the driving cylinder of the movable knife assembly is fixedly mounted on the lasting machine body via a cylinder fixing bracket.

[0010] Furthermore, both ends of the intermediate connecting arm are rotatably mounted on the push arm and the rotating frame respectively through a hinge shaft.

[0011] Furthermore, a cutting groove edge is provided at the end of the arc-shaped movable blade.

[0012] The beneficial effects are: the thread cutting device for the lasting machine described in the utility model can be installed on the existing lasting machine structure without replacing the original lasting machine parts, does not interfere with the needle and thread assembly above the feed wheel, and the pushing arm assembly is high in strength and durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a structural diagram of a thread trimming device for a lasting machine according to the present invention;

[0014] Figure 2 This is an enlarged structural diagram of the thread cutting structure of a thread cutting device for a lasting machine described in the present utility model;

[0015] Figure 3 This is a structural diagram of a movable cutter assembly of a thread trimming device for a lasting machine described in the utility model.

[0016] The following are the descriptions of the reference numerals:

[0017] 1. Lasting machine body; 2. Fixed knife assembly, 21. Fixed knife holder, 22. Curved fixed blade; 3. Moving cutter assembly, 31. Moving knife assembly drive cylinder, 32. Moving knife assembly bearing, 33. Clamping groove sleeve, 34. Curved moving blade, 341. Knife groove cutting edge, 35. Cylinder fixing frame, 36. Middle connecting arm, 361. Articulated shaft, 37. Push arm, 38. Rotating frame; 4. Inner feed wheel. DETAILED DESCRIPTION

[0018] The present invention will be further described below with reference to the accompanying drawings:

[0019] like Figure 1-Figure 3 As shown, a thread trimming device for a lasting machine comprises a lasting machine body 1, a fixed knife assembly 2 mounted on the lasting machine body 1, and a movable cutting knife assembly 3;

[0020] The movable cutter group 3 is composed of a movable cutter group drive cylinder 31 and a movable cutter group bearing 32. The end of the piston rod of the movable cutter group drive cylinder 31 is connected to a push arm 37, the end of the push arm 37 is hinged to an intermediate connecting arm 36, and the end of the intermediate connecting arm 36 is hinged to a rotating frame 38. The rotating frame 38 is connected to the clamping groove frame 33. The movable cutter group bearing 32 is fixedly installed with the rotating frame 38, so that the clamping groove frame 33 rotates with the movable cutter group bearing 32.

[0021] A clamping groove is provided on the side of the clamping groove sleeve 33, and an arc-shaped movable blade 34 is installed on the upper groove wall of the clamping groove. The clamping groove sleeve 33 drives the arc-shaped movable blade 34 to move during the rotation of the movable knife group bearing 32, thereby forming a shearing operation with the fixed knife group 2.

[0022] like Figure 1-Figure 3 As shown, the present invention also discloses the following multiple more optimized specific structures:

[0023] The fixed knife assembly 2 consists of a fixed knife holder 21 and an arc-shaped fixed blade 22 mounted on the fixed knife holder 21. The fixed knife holder 21 is fixed to the lasting machine body 1 by screws, and the arc-shaped fixed blade 22 is fixed to the fixed knife holder 21 by screws.

[0024] An inner feed wheel 4 is installed on the outer side of the lasting machine body 1 through the rotation of the wheel axle. The lasting machine generally clamps and conveys materials such as shoe uppers by rotating the inner feed wheel 4 and the outer feed wheel (not shown in the figure). This is a common structure of existing lasting machines and will not be described further. A disc groove is provided on the top wheel surface of the inner feed wheel 4, and an arc-shaped fixed blade 22 and an arc-shaped movable blade 34 are both arranged in the disc groove. The curvature of the arc-shaped fixed blade 22 matches the curvature of the groove edge of the disc groove.

[0025] The movable knife assembly bearing 32 is rotatably mounted on the wheel shaft below the inner feeding wheel 4 so as to rotate around the wheel shaft when driven.

[0026] The driving cylinder 31 of the movable knife group is fixed to the main body 1 of the lasting machine through the cylinder fixing frame 35 and is fixed by screws for easy disassembly.

[0027] The two ends of the middle connecting arm 36 are rotatably mounted on the push arm 37 and the rotating frame 38 respectively through the hinge shaft 361.

[0028] The end of the arc-shaped movable blade 34 is provided with a knife groove edge 34, which is convenient for clamping the wire body during its rotation and advancement, so that it forms a shearing structure with the arc-shaped fixed blade 22 to cut the wire.

[0029] like Figure 1-3The wire shearing device shown for the lasting machine mainly uses the fixed knife group 2 and the movable knife group 3 to shear the wire. The movable knife group drive cylinder drives the rotating frame 38 and the movable knife group bearing 32 to rotate through the push arm 37 and the intermediate connecting arm 36, thereby driving the arc-shaped movable blade 34 to perform the shearing operation and cut the wire.

[0030] The transmission structures such as the push arm 37 and the intermediate connecting arm 36 are arranged below the inner feed wheel 4, which has a larger operating space and can enhance the strength of the arm. The overall strength is high and durable. The clamping groove sleeve 33 is arranged on the side of the inner feed wheel 4 and does not interfere with the needle assembly above it. There is no need to change the existing shaft structure of the inner feed wheel 4 and it can be installed directly.

[0031] Those skilled in the art should understand that the present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements shall fall within the scope of the present invention to be protected.

Claims

1. A thread trimming device for a lasting machine, characterized by: It includes a lasting machine main body, a fixed knife group and a movable cutting knife group installed on the lasting machine main body. The movable cutting knife group is composed of a movable knife group driving cylinder and a movable knife group bearing. The end of the piston rod of the movable knife group driving cylinder is connected to a push arm, the end of the push arm is hinged to an intermediate connecting arm, the end of the intermediate connecting arm is hinged to a rotating frame, a clamping groove sleeve frame is connected and installed on the rotating frame, the movable knife group bearing is fixedly installed together with the rotating frame, a clamping groove is provided on the side of the clamping groove sleeve frame, and an arc-shaped movable blade is installed on the upper groove wall of the clamping groove.

2. The thread trimming device for a lasting machine according to claim 1, characterized in that: The fixed knife assembly consists of a fixed knife holder and an arc-shaped fixed blade mounted on the fixed knife holder. The fixed knife holder is fixed to the main body of the lasting machine by screws, and the arc-shaped fixed blade is fixed to the fixed knife holder by screws.

3. The thread trimming device for a lasting machine according to claim 2, characterized in that: An inner feeding wheel is rotatably mounted on the outer side of the lasting machine body via a wheel shaft, a disc groove is provided on the top wheel surface of the inner feeding wheel, and the arc-shaped fixed blade and the arc-shaped movable blade are both arranged in the disc groove.

4. The thread trimming device for a lasting machine according to claim 3, characterized in that: The movable knife assembly bearing is rotatably mounted on the wheel shaft below the inner feeding wheel.

5. The thread trimming device for a lasting machine according to claim 1, characterized in that: The driving cylinder of the movable knife group is fixedly mounted on the lasting machine body through a cylinder fixing frame.

6. The thread trimming device for a lasting machine according to claim 1, characterized in that: The two ends of the intermediate connecting arm are rotatably mounted on the push arm and the rotating frame respectively through a hinge shaft.

7. The thread trimming device for a lasting machine according to claim 1, characterized in that: The end of the arc-shaped movable blade is provided with a knife groove cutting edge.

Images