A yarn cutting device

Abstract

This utility model discloses a yarn cutting device, including a base, a movable blade arm assembly, a fixed blade arm assembly, and a cutting blade assembly. The cutting blade assembly includes a fixed blade mounted on the fixed blade arm assembly. A rotating shaft is mounted on the fixed blade, and a movable blade is rotatably mounted on the rotating shaft. The ends of the fixed blade and the movable blade away from the rotating shaft form a cutting zone. A U-shaped notch is provided at the end of the movable blade near the rotating shaft. The movable blade arm assembly includes a mounting sleeve located within the notch. In this utility model, the opening angle of the movable blade is less restricted, allowing for a larger opening angle.

Description

Technical Field

[0001] This utility model relates to the field of loom technology, and more specifically, to a yarn cutting device. Background Technology

[0002] Existing technologies such as Figure 1 , Figure 2 As shown, the device includes a fixed cutter arm 11 and a movable cutter arm 12. A fixed cutter 111 is mounted on the fixed cutter arm 11, and a movable cutter 112 is mounted on the fixed cutter 111 via a mounting shaft 113 and a spring 114. The ends of the fixed cutter 111 and the movable cutter 112 form a shearing zone. An opening 115 is provided on the fixed cutter 111 between the shearing zone and the mounting shaft 113. An elongated groove 116 is provided on the movable cutter 112 between the shearing zone and the mounting shaft 113. A pin 121 is provided on the movable cutter arm 12, and the pin 121 passes through the opening 115 and enters the elongated groove 116. Because the pin 121 is located close to the shearing zone, the movement space is limited, which restricts the opening angle of the movable cutter 112. Furthermore, the location of the pin 121 between the shearing zone and the mounting shaft 113 results in an overly compact structure and difficulty in adjustment. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a yarn cutting device.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model discloses a yarn cutting device, including a base, a movable blade arm assembly, a fixed blade arm assembly, and a shearing blade assembly. The shearing blade assembly includes a fixed blade, which is installed on the fixed blade arm assembly. A rotating shaft is installed on the fixed blade, and a movable blade is rotatably mounted on the rotating shaft. The ends of the fixed blade and the movable blade away from the rotating shaft form a shearing zone. The end of the movable blade near the rotating shaft has a notch, which is U-shaped. The movable blade arm assembly includes a mounting sleeve, which is located inside the notch.

[0006] Furthermore, a rotating shaft extends through a fixed blade, and a spring is fitted onto the portion of the rotating shaft that extends through the fixed blade. A locking nut is threaded onto the end of the rotating shaft, with one end of the spring abutting against the fixed blade and the other end of the spring abutting against the locking nut.

[0007] Furthermore, the movable cutter arm assembly includes a fixed base, which is mounted on a base. A mounting shaft is rotatably installed inside the fixed base, and a cutter arm is mounted on the mounting shaft. One end of the cutter arm is rotatably connected to a roller, and the other end of the cutter arm is fitted with a mounting sleeve. A cam is provided at the lower part of the base, and a baffle is provided on the base above the fixed base. A spring is provided between the baffle and the cutter arm.

[0008] Furthermore, a mounting block is installed at the end of the cutter arm, a mounting rod is connected to the mounting block, and a mounting sleeve is installed on the mounting rod.

[0009] Furthermore, the fixed blade assembly includes a connecting seat mounted on the base, and a fixed blade connecting block is mounted on the connecting seat by fixing screws, with the fixed blade mounted on the fixed blade connecting block.

[0010] Furthermore, the fixed blade is provided with mounting screws, which are used to fix the fixed blade to the fixed blade connecting block.

[0011] The beneficial effects of this utility model are: the mounting sleeve for driving the moving blade is located on the outside of the rotating shaft connecting the moving blade and the fixed blade, that is, at the end away from the shearing zone, so the opening angle of the moving blade is less restricted and can be opened to a larger angle; the spatial layout of the overall structure is more reasonable. Attached Figure Description

[0012] Figure 1 Schematic diagram of existing technology Figure 1 ;

[0013] Figure 2 Schematic diagram of existing technology Figure 2 ;

[0014] Figure 3 This is a schematic diagram of one structure of the yarn cutting device in this embodiment;

[0015] Figure 4 This is a schematic diagram of one structure of the movable cutter arm assembly in this embodiment;

[0016] Figure 5 This is a schematic diagram of one structure of the shearing blade assembly in this embodiment;

[0017] Figure 6 This is a schematic diagram of one structure of the fixed cutter arm assembly in this embodiment.

[0018] Reference numerals: 11. Fixed cutter arm; 111. Fixed cutter; 112. Moving cutter; 113. Mounting shaft; 114. Spring; 115. Opening; 116. Long groove; 12. Movable cutter arm; 121. Pin;

[0019] 1. Base; 2. Movable cutter arm assembly; 21. Fixed seat; 22. Mounting shaft; 23. Cutter arm; 24. Roller; 25. Mounting block; 26. Mounting sleeve; 27. Mounting rod; 3. Fixed cutter arm assembly; 31. Fixed blade connecting block; 32. Connecting seat; 33. Fixing screw; 4. Yarn blocking assembly; 5. Shearing blade assembly; 51. Moving blade; 52. Fixed blade; 53. Mounting screw; 54. Rotating shaft; 55. Spring 1; 56. Locking nut; 57. Notch; 6. Cam; 7. Fixed wheel; 8. Spring 2; 9. Baffle. Detailed Implementation

[0020] 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.

[0021] like Figures 2-6 As shown, a yarn cutting device includes a base 1, a movable blade arm assembly 2, a fixed blade arm assembly 3, and a cutting blade assembly 5. The cutting blade assembly 5 includes a fixed blade 52, which is mounted on the fixed blade arm assembly 3. A rotating shaft 54 ​​is mounted on the fixed blade 52, and a movable blade 51 is rotatably mounted on the rotating shaft 54. The ends of the fixed blade 52 and the movable blade 51 away from the rotating shaft form a cutting zone. A notch 57 is provided at the end of the movable blade 51 near the rotating shaft 54. The notch 57 is U-shaped. The movable blade arm assembly 2 includes a mounting sleeve 26, which is located inside the notch 57.

[0022] Furthermore, a rotating shaft 54 ​​extends through the fixed blade 52, and a spring 55 is fitted onto the portion of the rotating shaft 54 ​​extending through the fixed blade 52. A locking nut 56 is threaded onto the end of the rotating shaft 54. One end of the spring 55 abuts against the fixed blade 52, and the other end of the spring 55 abuts against the locking nut 56. Through the cooperation of the locking nut 56 and the spring 55, the moving blade 51 is made to fit tightly against the fixed blade 52.

[0023] Furthermore, the movable blade arm assembly 2 includes a fixed base 21, which is mounted on the base 1. A mounting shaft 22 is rotatably mounted inside the fixed base 21, and a blade arm 23 is mounted on the mounting shaft 22. The blade arm 23 is fixed to the mounting shaft 22 by screws. One end of the blade arm 23 is rotatably connected to a roller 24, and the other end of the blade arm 23 is fitted with a mounting sleeve 26. A cam 6 is provided at the lower part of the base 1, and a baffle 9 is provided on the base 1 above the fixed base 21. A spring 8 is provided between the baffle 9 and the blade arm 23. Under the action of the spring 8, the roller 24 on the blade arm 23 engages with the cam 6. The cam 6 is designed according to a pre-designed curve to control the moving blade 51 to open at a suitable angle and cut the yarn at a specified angle.

[0024] Cam 6 is fixedly connected to the shaft of base 1 via fixed wheel 7. When the shaft rotates, cam 6 fixedly connected to it rotates together, thereby driving the cutter arm 23 to swing through roller 24, which in turn drives the mounting sleeve 26 on it to swing, thereby driving the moving blade 51 to swing through the notch 57 on the moving blade 51 to complete the cutting.

[0025] Furthermore, a mounting block 25 is installed at the end of the blade arm 23, a mounting rod 27 is connected to the mounting block 25, and a mounting sleeve 26 is installed on the mounting rod 27.

[0026] The mounting block 25 and the blade arm 23 are fixed together by bolts. The blade arm 23 is provided with a vertically arranged oval hole, so that the connection position between the mounting block 25 and the blade arm 23 can be adjusted, thereby adjusting the installation height of the mounting block 25, which in turn adjusts the installation height of the mounting sleeve 26, ensuring that the mounting sleeve 26 can be inserted into the notch 57.

[0027] Furthermore, the fixed blade assembly 3 includes a connecting seat 32 mounted on the base 1, and a fixed blade connecting block 31 is mounted on the connecting seat 32 by a fixing screw 33, and the fixed blade 52 is mounted on the fixed blade connecting block 31.

[0028] The connecting seat 32 is provided with a vertically arranged oval hole. The screw passes through the oval hole to install the connecting seat 32 on the base 1. Through this structure, the installation height of the connecting seat 32 on the base 1 can be adjusted, thereby adjusting the installation height of the shearing blade assembly 5.

[0029] Furthermore, the fixed blade 52 is provided with mounting screws 53, which are used to fix the fixed blade 52 to the fixed blade connecting block 31.

[0030] Furthermore, an elongated hole is formed in the fixed base 21 corresponding to the position of the mounting shaft 22, and the cutter arm 23 passes through the elongated hole. The cutter arm 23 can move laterally within the elongated hole to change its position, thereby controlling the mounting sleeve 26 at the appropriate position of the notch 57 to control the opening angle of the moving blade 51.

[0031] Furthermore, a yarn-blocking assembly 4 is also installed on the base 1, and the yarn-blocking assembly 4 can be adjusted in lateral position.

[0032] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A yarn cutting device characterized by, The assembly includes a base (1), a movable blade arm assembly (2), a fixed blade arm assembly (3), and a shearing blade assembly (5). The shearing blade assembly (5) includes a fixed blade (52), which is mounted on the fixed blade arm assembly (3). A rotating shaft (54) is mounted on the fixed blade (52), and a movable blade (51) is rotatably mounted on the rotating shaft (54). The fixed blade (52) and the movable blade (51) form a shearing zone at the ends away from the rotating shaft. A notch (57) is provided at the end of the movable blade (51) near the rotating shaft (54). The notch (57) is U-shaped. The movable blade arm assembly (2) includes a mounting sleeve (26), which is located inside the notch (57).

2. A yarn cutting device according to claim 1, wherein The rotating shaft (54) extends through the fixed blade (52), and a spring (55) is sleeved on the part of the rotating shaft (54) that extends through the fixed blade (52). A locking nut (56) is threaded to the end of the rotating shaft (54). One end of the spring (55) abuts against the fixed blade (52), and the other end of the spring (55) abuts against the locking nut (56).

3. The yarn cutting device of claim 1, wherein The movable cutter arm assembly (2) includes a fixed base (21), which is mounted on a base (1). A mounting shaft (22) is rotatably arranged inside the fixed base (21). A cutter arm (23) is mounted on the mounting shaft (22). A roller (24) is rotatably connected to one end of the cutter arm (23). A mounting sleeve (26) is installed at the other end of the cutter arm (23). A cam (6) is provided at the lower part of the base (1). A baffle (9) is provided on the base (1) above the fixed base (21). A spring (8) is provided between the baffle (9) and the cutter arm (23).

4. The yarn cutting device of claim 3, wherein The end of the blade arm (23) is equipped with a mounting block (25), and a mounting rod (27) is connected to the mounting block (25). A mounting sleeve (26) is installed on the mounting rod (27).

5. The yarn cutting device according to claim 1, characterized in that, The fixed blade assembly (3) includes a connecting seat (32) mounted on a base (1). A fixed blade connecting block (31) is mounted on the connecting seat (32) by a fixing screw (33). The fixed blade (52) is mounted on the fixed blade connecting block (31).

6. A yarn cutting device according to claim 5, wherein The fixed blade (52) is provided with mounting screws (53), which are used to fix the fixed blade (52) to the fixed blade connecting block (31).

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