A guide roller assembly and a yarn feeder for a high-speed, multi-path yarn feeder

Abstract

This utility model relates to the field of yarn feeder technology, and discloses a guide roller assembly and a yarn feeder for a high-speed, multi-path yarn feeder. The guide roller assembly includes a bearing B, a bearing A, a roller, a mandrel, an elastic washer, and fixing screws. Bearing B is a floating bearing. An O-ring is added to the mandrel at the location of the floating bearing B. By changing the depth of the groove of the O-ring and the matching of the O-ring wire diameter, suitable friction can be obtained, stabilizing the static state of the inner ring of the floating bearing B, avoiding wear between the inner ring of bearing B and the mandrel, and ensuring that the bearing is always in a normal working state. This guide roller assembly has a simple structure and stable improvement effect.

Description

Technical Field

[0001] This utility model relates to the field of yarn feeder technology, and more specifically, to a guide roller assembly and a yarn feeder for a high-speed multi-channel yarn feeder. Background Technology

[0002] Roller structures are common rotating mechanisms in yarn feeders. Due to thermal expansion and contraction, different materials exhibit varying length changes at different temperatures. To prevent inconsistent axial dimensional changes between the aluminum roller and the iron mandrel, which could lead to excessive axial forces on the inner and outer rings of the bearing and cause it to seize, the bearing in this structure is typically supported by having one end fixed and the other floating.

[0003] The applicant's older model yarn feeder guide roller assembly features a fixed bearing A and a floating bearing B. The outer ring of bearing A has an interference fit with the roller, while the inner ring has a clearance fit with the spindle. The inner ring of bearing A is fixed by tightening the spindle with fixing screw A. Similarly, the outer ring of bearing B has an interference fit with the roller, while the inner ring has a clearance fit with the spindle. Tightening the spindle with fixing screw B forces a certain unidirectional preload on the inner ring of bearing B, allowing for axial floating within a certain range and maintaining a suitable axial force. This ensures appropriate static friction between the inner ring of bearing B and the elastic washer, maintaining the inner ring in a stationary or very slowly rotating normal working state. However, this structure is only suitable for applications with low rotational speeds and small axial dimensions.

[0004] On the one hand, as users' demands for yarn feeder speeds continue to increase, roller speeds have risen from 3000 rpm to 5000 rpm. For bearings, the higher outer ring speed transmits greater torque to the inner ring through the adhesion between the internal grease and the roller raceway. This increased torque disrupts the original force balance between the inner ring and the elastic washer, causing the inner ring to rotate faster relative to the spindle, thus accelerating wear on both. After a period of operation, the clearance between the inner ring and the spindle becomes looser, leading to even faster rotation of the inner ring relative to the spindle and more severe wear. The temperature rise generated by intense friction shortens the bearing's service life.

[0005] On the other hand, users have increased their requirements for the number of yarn feeding paths in yarn feeders, from the original 8 paths to 16 paths or even more. This has more than doubled the length of the yarn guide roller assembly. The longer rollers and mandrel mean that the length variation due to temperature is more than double, which in turn means that the axial displacement range of bearing B is more than double, consequently affecting the compression variation of the elastic washer. When the axial force generated by the elastic washer becomes insufficient or even nonexistent, the original force balance between the bearing inner ring and the elastic washer is disrupted, causing the bearing inner ring to rotate faster relative to the mandrel, ultimately shortening the bearing's lifespan. Summary of the Invention

[0006] This utility model addresses the shortcomings of existing technologies by providing a guide roller assembly and a yarn feeder for a high-speed, multi-channel yarn feeder.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A guide roller assembly for a high-speed, multi-path yarn feeder includes a bearing B, a bearing A, a roller, a mandrel, an elastic washer, and a fixing screw. Bearing A is fitted onto the head of the mandrel, bearing B is fitted onto the tail of the mandrel, and the roller is fitted onto the outside of bearings B and A. The fixing screw is locked to the end of the mandrel, and an elastic washer is provided between the fixing screw and bearing B. A groove is provided at the location where the mandrel fits onto bearing B, and an O-ring is placed within the groove, with the O-ring positioned between bearing B and the mandrel. The depth and width of the groove are adapted to the cross-sectional dimensions of the O-ring. Preferably, the O-ring has a surface friction coefficient lower than that of the mandrel.

[0009] Preferably, the O-ring is made of rubber.

[0010] Preferably, the depth of the groove is 17-20% of the radius of the mandrel portion.

[0011] Preferably, a flat washer is provided between the fixing screw and the mandrel, and the elastic washer is located between the flat washer and the bearing B.

[0012] Furthermore, this utility model also discloses a yarn feeder, which includes a yarn feeder base and a guide roller assembly for a high-speed multi-channel yarn feeder. The yarn feeder base is sleeved on the spindle head of the guide roller assembly, and the yarn feeder base is located at the front end of bearing A.

[0013] This invention addresses the problem of accelerated wear between the inner ring of the floating bearing B and the spindle in high-speed / multi-path applications of the yarn guide roller assembly. An O-ring is added to the spindle at the location of the floating bearing B. By adjusting the depth of the groove containing the O-ring and the diameter of the O-ring wire, suitable friction can be obtained, stabilizing the inner ring of the floating bearing B in a static state, preventing wear between the inner ring and the spindle, and ensuring the bearing is always in normal working condition. This structure is simple to manufacture and provides a stable improvement effect. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the yarn feeder of this utility model.

[0015] Figure 2 for Figure 1 A magnified view of part A in the image. Detailed Implementation

[0016] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0018] like Figure 1 , 2 As shown, a yarn feeder includes a yarn feeder base 9 and a guide roller assembly 10 for a high-speed, multi-path yarn feeder. The guide roller assembly 10 includes a bearing B1, a bearing A2, a roller 3, a spindle 4, an elastic washer 5, a flat washer 6, and a fixing screw 7. The bearing A2 is fitted onto the head of the spindle 4, the bearing B1 is fitted onto the tail of the spindle 4, the roller 3 is fitted onto the outside of the bearings B1 and A2, the fixing screw 7 is locked to the end of the spindle 4, the flat washer 6 is disposed between the fixing screw 7 and the bearing B1, and the elastic washer 5 is located between the flat washer 6 and the bearing B1. The yarn feeder base 9 is located at the front end of the bearing A2, and the front end of the guide roller assembly 10 is locked by a screw 11.

[0019] The mandrel 4 is fitted onto the bearing B1 and has a groove 41. An O-ring 8 is placed in the groove 41. The O-ring 8 is located between the bearing B1 and the mandrel 4. The depth and width of the groove 41 are matched with the cross-sectional dimensions of the O-ring 8. The surface friction coefficient of the O-ring 8 is lower than that of the mandrel 4. The depth of the groove 41 is 18% of the radius of the part of the mandrel 4.

[0020] The above description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A guide roller assembly for a high-speed multi-path yarn feeder, the guide roller assembly comprising a bearing B (1), a bearing A (2), a roller (3), a spindle (4), an elastic washer (5), and a fixing screw (7), wherein the bearing A (2) is sleeved on the head of the spindle (4), the bearing B (1) is sleeved on the tail of the spindle (4), the roller (3) is sleeved on the outside of the bearings B (1) and A (2), the fixing screw (7) is locked at the end of the spindle (4), and an elastic washer (5) is provided between the fixing screw (7) and the bearing B (1), characterized in that, The mandrel (4) is fitted onto the bearing B (1) and a groove (41) is provided. An O-ring (8) is provided in the groove (41). The O-ring (8) is located between the bearing B (1) and the mandrel (4). The depth and width of the groove (41) are adapted to the cross-sectional dimensions of the O-ring (8).

2. The guide roller assembly for a high-speed multi-path yarn feeder according to claim 1, characterized in that, The O-ring (8) is made of rubber.

3. The guide roller assembly for a high-speed multi-path yarn feeder according to claim 1, characterized in that, The depth of the groove (41) is 17-20% of the radius of the part of the mandrel (4).

4. The guide roller assembly for a high-speed multi-path yarn feeder according to claim 1, characterized in that, A flat washer (6) is also provided between the fixing screw (7) and the spindle (4), and an elastic washer (5) is located between the flat washer (6) and the bearing B (1).

5. A yarn feeder, characterized in that, The yarn feeder includes a yarn feeder base (9) and a guide roller assembly (10) for a high-speed multi-channel yarn feeder as described in any one of claims 1-4. The yarn feeder base (9) is sleeved on the head of the spindle (4) of the guide roller assembly (10), and the yarn feeder base (9) is located at the front end of the bearing A (2).

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