BALLSCREW ASSEMBLY HAVING A LOW FRICTION SLEEVE
First Claim
1. A ballscrew assembly comprising:
- ballnut comprising a first material;
a ballnut housing comprising a second material, wherein the first material and the second material are different materials; and
a sleeve comprising a third material positioned between an exterior surface of the ballnut and an interior surface of the ballnut housing,wherein the sleeve is made from a deformable material configured to assist axial movement of the ballnut.
2 Assignments
0 Petitions
Accused Products
Abstract
A ballscrew assembly may include a ballnut configured to combat the negative effects of thermal expansion of dissimilar materials used within the ballscrew assembly. Moreover, the ballscrew assembly described herein may have a decreased coefficient of friction as compared with a steel on steel housing and ballnut configuration. A ballscrew assembly may comprise a ballnut made from a first material, a ballnut housing made from a second material, and a sleeve made from a third material. The sleeve may be positioned between the exterior of the ballnut and an interior of the ballnut housing to reduce friction between the exterior surface of the ballnut and an interior surface of the ballnut housing.
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Citations
20 Claims
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1. A ballscrew assembly comprising:
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ballnut comprising a first material; a ballnut housing comprising a second material, wherein the first material and the second material are different materials; and a sleeve comprising a third material positioned between an exterior surface of the ballnut and an interior surface of the ballnut housing, wherein the sleeve is made from a deformable material configured to assist axial movement of the ballnut. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An apparatus comprising:
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a sleeve made from a third material, wherein the sleeve is positioned between an exterior of a ballnut comprising a first material and an interior of a ballnut housing comprising a second material, wherein the first material and the second material are different materials, wherein the third material comprises a coefficient of thermal expansion greater than the coefficient of thermal expansion off the first material, wherein the third material comprises a coefficient of thermal expansion less than the coefficient of thermal expansion of the second material, and wherein the ballnut travels axially along at least one slot integral to the sleeve.
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19. A method of manufacture of a ballscrew assembly comprising:
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disposing a sleeve comprising a third material within a ballnut housing comprising a second material; and inserting a ballnut comprising a first material within an aperture of the sleeve, wherein the second material and the first material are different materials, wherein the sleeve has a coefficient of friction less than the coefficient of friction of at least one of the first material and the second material. - View Dependent Claims (20)
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Specification