Method and apparatus for releasable fastening and for modification of the relative positions of two components with respect to one another
View Patent ↗An apparatus for releasable fastening and for modifying the relative position of two components ( 1, 1 ′, Bf, G; 2, 2 ′, Bk, Br), which have a common connecting surface forming a contact surface ( 5, 5 ′), comprises two screws ( 3 ), which in coaction with specially configured V-shaped notch zones ( 9 a 1 , 9 a 2 ; 9 b 1 , 9 b 2 ; 9 a 3 , 9 a 4 ; 9 b 3 , 9 b 4 ) permit a relative positioning in zero-backlash and accurately aligned fashion, and serve as the fastening means. It is thereby possible to perform a linear displacement and/or a rotation and/or a tilt in simple fashion.
1. An apparatus comprising:
a movable component including a first notch zone having a pair of beveled surfaces, and a second notch zone having a pair of beveled surfaces, wherein the first and second notch zones are spaced apart, and each pair of beveled surfaces extends at an acute angle relative to the longitudinal axis of each respective notch zone;
a base component including a connecting surface engaged by the movable component;
a first point-contact member threadably adjustable relative to the base component and having a tapered portion arranged in single point contact with each of the pair of beveled surfaces of the first notch zone to form a first two-point contact; and
a second point-contact member threadably adjustable relative to the base component and having a tapered portion arranged in single point contact with each of the pair of beveled surfaces of the second notch zone to form a second two-point contact;
wherein the movable component is displaced along the connecting surface as a result of being engaged by at least one of the first and second point-contact members as the at least one point-contact member is adjusted relative to the base component.
2. The apparatus as defined in claim 1 , wherein the movable component is displaceable on the connecting surface of the base component along a translation path corresponding to the shortest connecting path between rotational axes of the first and second point-contact members.
3. The apparatus as defined in claim 2 , wherein the movable component has, in a sectional plane perpendicular to the contacting surfaces and containing the translation path, the shape of a trapezoid.
4. The apparatus as defined in claim 3 , wherein the trapezoid is an isosceles trapezoid.
5. The apparatus as defined in claim 3 , wherein a common intersection line between the pair of beveled surfaces of the first notch zone and a common intersection line between the pair of beveled surfaces of the second notch zone form converging sides of the trapezoid.
6. The apparatus as defined in claim 1 , wherein the first and second notch zones are V-shaped notch zones each forming, in plan view, an angle in the range of 90 +/−20 degrees.
7. The apparatus as defined in claim 1 , wherein the connecting surface of the base component is non-planar.
8. The apparatus as defined in claim 1 , wherein at least one of the first and second point-contact members comprises a screw mating with a threaded hole in the base component, and the screw includes a countersink head defining the tapered portion.
9. The apparatus as defined in claim 1 , wherein at least one of the first and second point-contact members comprises a nut mating with a threaded stud fixed to the base component, and the nut includes a rounded or frustoconical contour defining the tapered portion.
10. The apparatus as defined in claim 1 , wherein the first and second notch zones are V-shaped notch zones having planar beveled surfaces.
11. The apparatus as defined in claim 1 , wherein the first and second notch zones include converging non-planar beveled surfaces.
12. The apparatus as defined in claim 11 , wherein the tapered portion of the first point-contact member and the tapered portion of the second point-contact member are frustoconically shaped to make single point contact with the non-planar beveled surfaces of the first and second notch zones.
13. The apparatus as defined in claim 1 , wherein the movable component has a plane of symmetry, and each of the first and second notch zones includes an elongated cutout having a longitudinal axis lying in the plane of symmetry and coinciding with the translation path.
14. An apparatus comprising:
a baseplate;
a movable component including a first notch zone having a pair of beveled surfaces, and a second notch zone having a pair of beveled surfaces, wherein the first and second notch zones are spaced apart;
an intermediate component between the baseplate and the movable component, the intermediate component engaging the baseplate and including a connecting surface engaged by the movable component, a third notch zone having a pair of beveled surfaces, and a fourth notch zone having a pair of beveled surfaces, wherein the third and fourth notch zones are spaced apart;
a first point-contact member threadably adjustable relative to the baseplate and having a tapered portion arranged in single point contact with each of the pair of beveled surfaces of the first notch zone to form a first two-point contact;
a second point-contact member threadably adjustable relative to the base component and having a tapered portion arranged in single point contact with each of the pair of beveled surfaces of the second notch zone to form a second two-point contact;
a third point-contact member threadably adjustable relative to the base component and having a tapered portion arranged in single point contact with each of the pair of beveled surfaces of the third notch zone to form a third two-point contact; and
a fourth point-contact member threadably adjustable relative to the base component and having a tapered portion arranged in single point contact with each of the pair of beveled surfaces of the fourth notch zone to form a fourth two-point contact;
whereby the first and second point-contact members are adjustable in a coordinated manner such that the movable component is guided relative to the intermediate component in a first translation direction, and the third and fourth point-contact members are adjustable in a coordinated manner such that the intermediate component and the movable component are guided relative to the baseplate in a second translation direction not coincident with the first translation direction.
15. The apparatus as defined in claim 14 , wherein the first translation direction and the second translation direction form an angle of 90 degrees.