A weft insertion device for an air jet loom

Abstract

This utility model discloses a weft insertion device for an air-jet loom, comprising: a rocker arm and a camshaft. An adjustable first roller and a second roller are mounted on the rocker arm, and a first cam and a second cam are mounted on the camshaft. The first cam is tangentially positioned to the first roller, and the second roller is tangentially positioned to the second cam. By configuring the cam on the camshaft and the cam roller tangentially mounted to it, and adjusting the eccentricity of the cam roller, the cam roller and cam are made to make tangential contact, thereby eliminating the gap between the cam and the cam roller, increasing the conjugacy of the cam, and avoiding problems such as abnormal cam wear and excessive noise caused by improper cam assembly.

Description

Technical Field

[0001] This utility model relates to the field of cam technology for jet looms, and in particular to a weft insertion device for jet looms. Background Technology

[0002] After years of development, air-jet looms are now poised to replace water-jet and shuttle looms. The weft-beating mechanism of air-jet looms typically uses a linkage system. However, with recent technological advancements, the conjugate cam mechanism has emerged. Due to its advantages such as accurate and reliable motion transmission, the cam mechanism is gaining increasingly widespread application. In loom production lines, the production of conjugate cams is mostly achieved through measurement and mapping. Although the cams produced can meet production needs with advancements in measurement and machining technologies, the clearance between the cam and roller caused by machining cannot be eliminated. This leads to abnormal wear and high noise levels in cam-driven weft-beating looms during operation. Therefore, it is necessary to design a cam-driven weft-beating device to reduce wear, lower noise, and mitigate these issues. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies, the purpose of this utility model is to provide a jet loom weft insertion device.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] A weft insertion device for an air-jet loom includes: a rocker arm and a camshaft, wherein an adjustable first roller and a second roller are mounted on the rocker arm, and a first cam and a second cam are provided on the camshaft; the first cam is tangentially disposed to the first roller, and the second roller is tangentially disposed to the second cam.

[0006] The rocker arm is provided with a first roller mounting bracket and a second roller mounting bracket, which are installed alternately. The first roller and the second roller are mounted on the first roller mounting bracket and the second roller mounting bracket.

[0007] The first roller includes: a first pin mounted on a first roller mounting bracket, a first roller roller mounted on the first pin, a first roller outer ring surface disposed outside the first roller roller, and the first roller outer ring surface being coaxially mounted with the first pin.

[0008] A first clamping block is installed on the first roller mounting bracket, and the first pin is installed between the first roller mounting bracket and the first clamping block. The first clamping block is installed on the first roller mounting bracket by a nut.

[0009] A second pin is mounted on the second roller mounting bracket, a second roller is mounted on the second pin, and a second outer ring surface is provided outside the second roller. The second outer ring surface is mounted off-center from the second pin.

[0010] A second clamping block is installed on the second roller mounting bracket, and the second pin is installed between the second roller mounting bracket and the second clamping block. The second clamping block is installed on the second roller mounting bracket by a nut.

[0011] One end of the second pin is provided with an adjustment hole, and an adjustment bolt for adjusting the position of the second pin is installed in the adjustment hole.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This utility model provides a weft insertion device for an air-jet loom. By setting a cam on the camshaft and a cam roller tangentially installed with the cam, the eccentricity of the cam roller is adjusted so that the cam roller and the cam are in tangential contact, thereby eliminating the gap between the cam and the cam roller, increasing the conjugacy of the cam, and avoiding problems such as abnormal cam wear and high noise when the cam is not properly assembled. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the jet loom weft insertion device of this utility model;

[0015] Figure 2 This is a side view of the jet loom beat-up device of this utility model;

[0016] Figure 3 This is a cross-sectional view of the first roller of the jet loom beating device of this utility model;

[0017] Figure 4 This is a cross-sectional view of the second roller of the jet loom beating device of this utility model.

[0018] In the figure, 1—rocker arm; 2—camshaft; 3—first roller; 4—second roller; 5—first roller mounting bracket; 6—second roller mounting bracket; 2a—first cam; 2b—second cam; 3a—outer ring face of first roller; 3b—first roller roller; 3c—first pin; 4a—outer ring face of second roller; 4b—second roller roller; 4c—second pin; 51—first clamping block; 61—second clamping block. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the protection scope of the present invention.

[0020] like Figure 1 , 2As shown, this utility model provides a weft insertion device for an air-jet loom, including: a rocker arm 1 and a camshaft 2. An adjustable first roller 3 and a second roller 4 are installed on the rocker arm 1. A first cam 2a and a second cam 2b are provided on the camshaft 2. The first cam 2a is tangentially disposed with the first roller 3, and the second roller 4 is tangentially disposed with the second cam 2b.

[0021] The camshaft 2 is connected to the main motor. When the main motor is powered on and rotates, the camshaft 2 rotates, which drives the rocker arm 1 to swing back and forth to achieve weft insertion.

[0022] Specifically, the rocker arm 1 is provided with a first roller mounting bracket 5 and a second roller mounting bracket 6 installed alternately, and the first roller 3 and the second roller 4 are mounted on the first roller mounting bracket 5 and the second roller mounting bracket 6.

[0023] like Figure 3 As shown, the first roller 3 includes: a first pin 3c mounted on a first roller mounting bracket 5, a first roller 3b mounted on the first pin 3c, a first roller outer ring surface 3a disposed outside the first roller 3b, the first roller outer ring surface 3a being coaxially mounted with the first pin 3c, and the first roller outer ring surface 3a being coaxially rotatable along the axis of the first pin.

[0024] For example, a first clamping block 51 is installed on the first roller mounting bracket 5, and the first pin 3c is installed between the first roller mounting bracket 5 and the first clamping block 51. The first clamping block 51 is clamped onto the first roller mounting bracket 5 by a nut.

[0025] like Figure 4 As shown, a second pin 4c is mounted on the second roller mounting bracket 6, and a second roller 4b is mounted on the second pin 4c. A second roller outer ring surface 4a is provided outside the second roller 4b, and the second roller outer ring surface 4a is mounted off-axis to the second pin 4c. The second roller outer ring surface 4a can rotate off-axis along the axis of the second pin 4c. One end of the second pin 4c is provided with an adjustment hole, and an adjustment bolt for adjusting the position of the second pin 4c is installed in the adjustment hole. Specifically, the eccentricity between the second roller outer ring surface 4a and the second pin 4c can be adjusted through the adjustment hole.

[0026] Preferably, a second clamping block 61 is installed on the second roller mounting bracket 6, and the second pin 4c is installed between the second roller mounting bracket 6 and the second clamping block 61. The second clamping block 61 is pressed and installed on the second roller mounting bracket 6 by a nut. During installation, the rocker arm 1 and the camshaft 2 are fixed in the frame; the outer ring surface 3a of the first roller 3 is tangentially installed with the first cam 2a, and the first roller 3 is fastened with bolts; when installing the second roller 4, the eccentricity between the second pin 4c and the outer ring surface 4a of the second roller is adjusted. There is a certain eccentricity between the rotation center of the second pin 4c and the rotation center of the outer ring surface 4a of the second roller. The second pin 4c can be rotated to adjust the eccentricity so that the outer ring surface 4a of the second roller is tangential to the second cam 2b. At this time, the second roller 4 is fastened by adjusting bolts. At this point, both cam rollers and their corresponding cams are tangent to each other, avoiding the skipped contact that occurs during installation when the cam rollers and cams are not fully tangent, which can lead to abnormal wear, vibration, noise, and other problems. When the main motor is powered on and rotates, the camshaft 2 rotates, driving the rocker arm 1 to reciprocate, thus achieving weft insertion.

[0027] It will be apparent to those skilled in the art that the above specific examples are merely preferred embodiments of this utility model. Therefore, any improvements or modifications that those skilled in the art may make to certain parts of this utility model still embody the principles of this utility model and achieve its purpose, and all fall within the scope of protection of this utility model.

Claims

1. A weft insertion device for an air-jet loom, characterized in that, include: A rocker arm (1) and a camshaft (2) are provided. An adjustable first roller (3) and a second roller (4) are mounted on the rocker arm (1). A first cam (2a) and a second cam (2b) are provided on the camshaft (2). The first cam (2a) is tangential to the first roller (3), and the second roller (4) is tangential to the second cam (2b). The swing arm (1) is provided with a first roller mounting bracket (5) and a second roller mounting bracket (6) installed alternately, and the first roller (3) and the second roller (4) are mounted on the first roller mounting bracket (5) and the second roller mounting bracket (6). The first roller (3) includes: a first pin (3c) mounted on a first roller mounting bracket (5), a first roller (3b) mounted on the first pin (3c), a first roller outer ring surface (3a) provided outside the first roller (3b), and the first roller outer ring surface (3a) being coaxially mounted with the first pin (3c); the first roller outer ring surface (3a) of the first roller (3) is tangentially mounted with the first cam (2a), and the first roller (3) is fastened by bolts; when the second roller (4) is in operation, the eccentricity between the second pin (4c) and the second roller outer ring surface (4a) is adjusted, and there is a certain eccentricity between the rotation center of the second pin (4c) and the rotation center of the second roller outer ring surface (4a). The second pin (4c) is rotatable, and the eccentricity is adjusted so that the outer ring surface (4a) of the second roller is tangent to the second cam (2b). The first roller mounting bracket (5) is equipped with a first clamping block (51), and the first pin (3c) is installed between the first roller mounting bracket (5) and the first clamping block (51). The first clamping block (51) is clamped on the first roller mounting bracket (5) by a nut. The second roller mounting bracket (6) is equipped with a second pin (4c), and the second roller (4b) is equipped with a second outer ring surface (4a) outside the second roller (4b). The second outer ring surface (4a) is installed off-axis with the second pin (4c).

2. The jet loom beat-up device according to claim 1, characterized in that, The second roller mounting bracket (6) is equipped with a second clamping block (61), the second pin (4c) is installed between the second roller mounting bracket (6) and the second clamping block (61), and the second clamping block (61) is installed on the second roller mounting bracket (6) by a nut.

3. The jet loom beating device according to claim 1 or 2, characterized in that, One end of the second pin (4c) is provided with an adjustment hole, and an adjustment bolt for adjusting the position of the second pin (4c) is installed in the adjustment hole.

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