Electrostatic devices for mechanical blocking

• US 6,684,994 B1
• Filed: 10/12/2001
• Issued: 02/03/2004
• Est. Priority Date: 04/14/1999
• Status: Expired due to Fees

• Current Assignee: Martyn Sergeevich Nunuparov
• Original Assignee: Martyn Sergeevich Nunuparov
• Inventors: Nunuparov, Martyn Sergeevich
• Primary Examiner(s): Bonck, Rodney H.
• Application Number:
  US09/958,861
• Time in Patent Office: 844 Days
• Field of Search: 192/84.1, 192/84.4, 192/20, 192/41.R, 192/47, 192/30.R, 192/21.5, 251/129.01, 475/149, 74/25
• US Class Current: 192/84.4
• CPC Class Codes: G05G 5/08 Interlocking of members, e.g. locking member in a particular position before or during the movement of another member
• CPC Class Codes: H02N 1/006 of the gap-closing type H02N1/004 takes precedence
• CPC Class Codes: H02N 13/00 Clutches or holding devices using electrostatic attraction, e.g. using Johnson-Rahbek effect

Abstract

An electrostatic unit for location of members of mechanical devices includes a housing of the electrostatic location unit, a locating member arranged in the housing and movable from one position to another, an electrostatic location apparatus for location of the locating member in one of the positions, placed in the housing and including two electrically conductive members and a layer of a dielectric therebetween, conformal surfaces of the electrically conductive members and the dielectric for electrostatic interaction and location of one relative to the other when they are in close proximity to each other and an electric charge is applied to the electrically conductive members. At least one of the members of the electrostatic location apparatus includes a layer of an elastic material on a conformal surface.

Claims

1. An electrostatic unit for location of members of a mechanical device, comprising:

a housing of the electrostatic location unit,

a locating member arranged in the housing and movable from one position to another,

an electrostatic location means designed for location of the locating member in one of the positions. placed in the housing and comprising two electrically conductive members and a layer of a dielectric therebetween, conformal surfaces of the electrically conductive members and the dielectric being designed for electrostatic interaction and location of one relative to the other when they are in close proximity to each other and when an electric charge is applied to the electrically conductive members, one of said members of the electrostatic location means being kinematically linked to the locating member,

a means for applying an electric charge to the electrically conductive members, said means being connected to the electrically conductive members,

at least one of the members of the electrostatic location means comprises a layer of an elastic material on a conformal surface, said elastic material being selected from the group consisting of an electrically conductive material and a dielectric material.

2. An electrostatic unit according to claim 1, wherein the layer of the elastic material on the conformal surface comprises at least two sublayers of a material, one of the sublayers of the material being electrically conductive and the other being dielectric.

3. An electrostatic unit according to claim 2, wherein the sublayer of the electrically conductive material is deposited by a process selected from the group consisting of depositing a sublayer of a metal onto the sublayer of the dielectric material, introducing particles of the electrically conductive material into a surface region of the dielectric sublayer, or by such changes in a chemical or stoichiometric composition of the surfaces of the dielectric sublayer which make the dielectric sublayer electrically conductive.

4. An electrostatic unit according to claim 1, wherein at least one layer of the elastic material comprises an elastic film fastened on a carcass and connected to the respective electrically conductive member of the electrostatic location means.

5. An electrostatic unit according to claim 4, wherein the elastic film is fastened on a member of the electrostatic location means and/or on the carcass by a means selected from the group consisting of a gluing joint, a welding joint or a clamping joint.

6. An electrostatic unit according to claim 4, wherein the elastic film comprises sublayers made of materials selected from the group consisting of an electrically conductive material and a dielectric material.

7. An electrostatic unit according to claim 4, wherein one part of a contour of the elastic film is fastened on the carcass, and another part of the elastic film is not fastened on the carcass and is free in the process of interaction of the conformal surfaces of the electrically conductive members.

8. An electrostatic unit according to claim 4, wherein the carcass comprises at least two non-linked members.

9. An electrostatic unit according to claim 8, wherein the carcass comprises two non-linked rings, a diameter of one of the rings being less than that of the other, wherein the rings are arranged in one plane and one ring inside the other ring, and the elastic film fastened on the carcass has the form of a flat ring.

10. An electrostatic unit according to claim 8, wherein the carcass comprises two rings having equal diameters, wherein the rings are arranged in different parallel planes, the centers of the rings are on one axis, and the elastic film fastened on the carcass has the form of a cylinder.

11. An electrostatic unit according to claim 8, wherein the carcass comprises a ring and a disc having different diameters and arranged in different parallel planes, the centers of the ring and the disc are on one axis, and the elastic film fastened on the carcass has the form of a cone.

12. An electrostatic unit according to claim 1, wherein the layer of the elastic material of the electrostatic location means member is made of an electrically conductive material selected from the group consisting of polymeric materials.

13. An electrostatic unit according to claim 1, wherein used as the materials of the layers and sublayers of the conformal surfaces are materials selected from the group consisting of materials based on polyethylene terephtalates, polytetrafluoroethylenes, polytrifluorochloroethylenes, poly-imides and silicon rubber.

14. An electrostatic unit according to claim 1, wherein used as the materials for the layers of the conformal surfaces are semiconductor materials.

15. An electrostatic unit according to claim 1, wherein the conformal surfaces of the electrically conductive members are arranged in close proximity to one another, and mutual movement of the electrically conductive members is performed along said conformal surfaces, while location of mutual position of said members is performed when the electrical charge is applied to the electrically conductive members.

16. An electrostatic unit according to claim 1, wherein the conformal surfaces of the electrically conductive members have two. positions, that is, a position in close proximity to one another, and the other position at a certain distance from one another, and mutual movement of the electrically conductive members from one said position to the other is performed under mechanical action to the locating member, wherein electrostatic location of mutual position of the electrically conductive members is accomplished when the members are positioned in close proximity to one another.

17. An electrostatic unit according to claim 1, wherein said unit further comprises a means for returning the conformal surfaces of the members of the electrostatic location unit to one of selected positions, said means being arranged in the unit housing and directly linked to said members.

18. An electrostatic unit according to claim 1, wherein said unit further comprises a means for returning the locating member to one of selected positions, said means being linked to the locating member and the housing of the electrostatic location unit.

19. An electrostatic unit according to claim 17 or 18, wherein said unit is made as an electromechanical valve of a gas/hydraulic distribution system and further comprises

a pipe with a seat of the valve, a gate of the valve arranged to take two positions in one of which a hole of the valve seat is closed and in the other the hole of the valve seat is open, the housing of the electrostatic location unit being fastened on the pipe, and the locating member being kinematically linked to the gate.

20. An electromechanical device for power engagement of members of a mechanical unit, comprising:

an electrostatic location unit comprising;

a housing and a locating member linked to the housing and arranged so that it can move from one position to the other, a means for applying an electrical charge to the electrostatic location unit, at least two engaging members linked to the members of the mechanical unit and designed for power engagement relative to one another, a means for power engagement of the engaging members, said power engagement means being kinematically linked to at least one of the engaging members and having a locked position and an unlocked position, a means for returning the power engagement means to an initial position, said returning means being linked to one of the engaging members, wherein the power engagement means is kinematically linked to the locating member of the electrostatic location unit, said means for returning the power engagement means to an initial position, said returning means being linked to at least one of a plurality of members selected from the group consisting of the power engagement means and the locating member.

21. An electromechanical device according to claim 20, wherein the electrostatic location unit comprises

an electrostatic location means designed for location of the locating member in one of the positions, placed in the housing of the electrostatic location unit and comprising two electrically conductive members and a layer of a dielectric therebetween, conformal surfaces of the electrically conductive members and the dielectric being designed for electrostatic interaction and location of one relative to the other when they are in close proximity to each other and when an electrical potential is applied to the electrically conductive members, one of said members of the electrostatic location means being kinematically linked to the locating member,

wherein at least one of the members of the electrostatic location means comprises a layer of an elastic material on a conformal surface, said elastic material being selected from the group consisting of an electrically conductive material and a dielectric material.

22. An electromechanical device according to claim 20, wherein the electrostatic location unit comprises

an electrostatic location means designed for location of the locating member in one of the positions, placed in the housing of the electrostatic location unit and comprising two electrically conductive members and a layer of an electro-rheologic liquid therebetween, conformal surfaces of the electrically conductive members being designed for electrostatic interaction and location of one relative to the other when they are in close proximity to each other and when an electrical potential is applied to the electrically conductive members, one of said members of the electrostatic location means being kinematically linked to the locating member.

23. An electromechanical device according to claim 20, wherein said device is made as a planetary gear clutch designed to transfer rotary motion from one shaft of the planetary gear clutch to another shaft, axes of the shafts being coincident, and comprises

a ring gear secured on one of the shafts and having a slot and limiters made on a toothed surface of said gear,

a sun wheel secured on the other shaft and arranged inside the ring gear,

a means for power engagement of the sun wheel and the ring gear, said means being made as a satellite gear having positions such that

in a first position, the satellite gear is in the slot of the ring gear, and the ring gear and the sun wheel are out of power engagement, and

in a second position, the satellite gear thrusts against the limiter, and the ring gear and the sun wheel are in power engagement,

wherein the housing of the electrostatic location unit is secured on the same shaft as the sun wheel,

the locating member is made as a satellite gear carrier and performs location of the angular position of the satellite gear relative to the angular position of the sun wheel when an electrical charge is applied to the electrostatic location unit,

linked the means for returning the satellite gear to the slot of the ring gear is made as a spring linked to the carrier and the ring gear of the clutch.

24. An electromechanical device according to claim 20, wherein said device is made as an overrunning clutch designed to transfer rotary motion from one shaft to another shaft, axes of the shafts being coincident, and comprises

a bushing secured on one of the shafts,

a cam secured on the other of the shafts, arranged inside the bushing and made as a disc having a slot on the perimeter,

a means for power engagement of the cam and the bushing, said means being made as a friction disc arranged in a space between the cam and the bushing, an axis of said means being parallel to the axis of the shafts, wherein a diameter of the friction disc slightly exceeding the difference of an inner diameter of the bushing and an outer diameter of the cam so that the friction disc does not come into contact with the bushing when fitting into the cam slot and, when going out from the cam slot, causes power friction jamming of relative motion of the cam and the bushing,

an electrostatic location unit designed for location of the angular position of the friction disc relative to the angular position of the bushing, said unit being secured on a bushing shaft and comprising:

a locating member made as a flat fork rotating on an axle coincident with the axis of the shafts and having a slit that is a guide for the friction disc when it reciprocates radially from the cam to the bushing,

a means for returning the friction disc to an initial position, into the cam slot, is made as a spring linked to the friction disc and the cam axle.

25. An electromechanical device according to claim 20, wherein said device further comprises a means for mechanical setting the power engagement means to a selected position associated with one of the engaging members.

26. An electromechanical device according to claim 25, wherein said device is designed to interlock the transfer of motion from a driving member to a driven member of a transmission mechanism, wherein

the driving member is made as a disc rotating about an axle secured in the transmission mechanism and comprises a slot arranged on the disc perimeter,

the driven member is made as a bar reciprocating in a cradle secured in the housing of said mechanism,

the means for power engagement of the driving and driven members is made as a dog fastened rotatably on an axle which is fastened on the driven member,

the housing of the electrostatic location unit is arranged on the disc of the driving member,

the locating member is made as a disc whose axle is coincident with an axle of the driving member rotating about said axis, the locating member disc comprising a slot arranged on the disc perimeter,

the means for mechanical positioning the dog to the position of engaging the slots on the discs is made as a spring linked to the bar and the dog,

the means for returning the dog to the initial position is made as a spring linked to the disc of the locating member and the housing piece of the mechanism.