Bearing for both linear and curvilinear motions
First Claim
1. A bearing for both linear and curvilinear motions comprising a track rail having a track surface formed longitudinally, a bearing body provided with an endless track having a loaded ball rolling surface facing said track surface and a non-loaded ball recirculating passage which continuously connects with both ends of said loaded ball rolling surface, and a multiplicity of balls which recirculate through the endless track provided in said bearing body to bear a load in the area defined between said loaded ball rolling surface and the track surface of said track rail, wherein said loaded ball rolling surface constituting the endless track in said bearing body is provided with a linear loaded domain and a curvilinear loaded domain having a predetermined curvature, so that, in a linear area of the track surface of said track rail, a load is born by balls rolling on said linear loaded domain, whereas, in a curvilinear area of the track surface of said track rail, a load is born by balls rolling on said curvilinear loaded domain.
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Accused Products
Abstract
The present invention relates to a bearing for both linear and curvilinear motions which has a track rail, a bearing body provided with an endless track and a multiplicity of balls which recirculate through the endless track provided in the bearing body, wherein the endless track is defined by a loaded ball rolling surface which is provided with a linear loaded domain and a curvilinear loaded domain having a predetermined curvature, so that, in a linear area of the track surface of the track rail, a load is born by balls rolling on the linear loaded domain, whereas, in a curvilinear area of the track surface of the track rail, a load is born by balls rolling on the curvilinear loaded domain. Thus, it is possible to perform both linear and curvilinear guide operations with a single bearing.
21 Citations
9 Claims
- 1. A bearing for both linear and curvilinear motions comprising a track rail having a track surface formed longitudinally, a bearing body provided with an endless track having a loaded ball rolling surface facing said track surface and a non-loaded ball recirculating passage which continuously connects with both ends of said loaded ball rolling surface, and a multiplicity of balls which recirculate through the endless track provided in said bearing body to bear a load in the area defined between said loaded ball rolling surface and the track surface of said track rail, wherein said loaded ball rolling surface constituting the endless track in said bearing body is provided with a linear loaded domain and a curvilinear loaded domain having a predetermined curvature, so that, in a linear area of the track surface of said track rail, a load is born by balls rolling on said linear loaded domain, whereas, in a curvilinear area of the track surface of said track rail, a load is born by balls rolling on said curvilinear loaded domain.
Specification