Bearing for shed machine or motion transmission system, heald frame motion lever comprising such bearing, and shed machine comprising such lever or bearing

Abstract

The invention relates to a bearing (25) for a shed forming machine or a system for transmitting motion to a frame of a weaving machine. The bearing (25) comprises an inner ring (72), an outer ring (74) and rolling elements (76). The inner ring is centered on a main axis (A72), includes two side surfaces perpendicular to the main axis, and defines a circular outer circumferential ring (80) centered on the main axis. The outer ring (74) defines an inner circumferential ring (82) that is circular and centered on the main axis. Rolling elements (76) are interposed radially with respect to the main shaft between the outer and inner circumferential rings to guide the rotation of the outer ring around the main shaft with respect to the inner ring. The inner ring (72) comprises at least one groove (90) being open at both sides, extending opposite a portion of the outer circumferential ring (80) and forming a material bridge (94) between the groove and the outer circumferential ring. The material bridge (94) extends on an angular sector (99) of the inner ring, which is centered on the main axis (A72) of the bearing, and has a vertex angle ([alpha] 1) that is greater than or equal to the vertex angle ([beta] 2) of the angular sector occupied by two rolling elements (76), preferably greater than or equal to the vertex angle ([beta] 5) of the angular sector occupied by five rolling elements, and preferably greater than or equal to the apex angle ([beta] 9) of the angular sector occupied by nine rolling elements, more preferably greater than or equal to the apex angle ([beta] 13) of the angular sector occupied by thirteen rolling elements. The inner ring (72) further comprises at least one hole (88) for fixing the bearing (25).

Description

Technical field[0001]BACKGROUND OF THE INVENTION A bearing comprising a bearing for a hobbode forming machine or a system for transmitting motion to a frame, further comprising a braided mechanism lever including the bearing, and relates to a shuttle comprising such a lever or bearing. Port formation machine.Background technique[0002]In the weaving field, the loom intersects the warp yarn and the weft to woven the fabric according to the woven model. The homosal forming machine controls the movement of the warp yarn by a sheet mounted on a humerical frame. Based on the knitting complexity of the fabric to be produced, multiple crosses can be provided.[0003]It is known that each web is controlled between a high position and low position, respectively, and the mechanical transmission system comprises a pulling element, a link and a lever. Some leverages have rolls, and these rolls fit together with a bearing actuated by a rotary cam. A homosal forming machine that combines the other c...

AI Technical Summary

Problems solved by technology

However, the inner ring of the bearing is complete and rigid, with little or no deformation, which geometrically results in a loss of loaded contact or movement of the rolling elements outside of the loaded area and increases the displacement of the rolling elements in the axis of force load, which further exacerbates the effects of material fatigue on rolling elements and tracks

[0007] A known way to reduce material fatigue is to use thicker parts, however making the part heavier, which creates a greater inertial effect, resulting in higher forces at the rolling elements, which limits the expected reduction in material fatigue and thus Benefits in Extended Bearing Life

These thicker components can also cause cost and size issues for bearing components in the small space dictated by the size of the machine

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